Order No: RAC0209005C2

Room Air Conditioner

CS-ME7CKPG
CS-ME10CKPG
CS-ME12CKPG
CS-ME14CKPG
CS-ME18CKPG
CU-2E15CBPG
CU-2E18CBPG
CU-3E23CBPG
CU-4E27CBPG

CONTENTS
Page Page
1 Features 3 5.1. INDOOR UNIT (CS-
2 About Lead Free Solder (PbF) 3 ME7CKPG/ME10CKPG/ME12CKPG/ME14CKPG/ME18CK
2.1. DISTINCTION OF PbF P.C. BOARD 3 PG) 12
2.2. CAUTION 3 5.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 13
3 Functions 4 5.3. OUTDOOR UNIT (CU-3E23CBPG) 14
3.1. REMOTE CONTROL 4 5.4. OUTDOOR UNIT (CU-4E27CBPG) 15
3.2. INDOOR UNIT 5 6 Refrigeration Cycle Diagram 16
3.3. OUTDOOR UNIT 7 6.1. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 16
4 Product Specifications 8 6.2. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG) 17
4.1. PRODUCT SPECIFICATIONS 8 7 Block Diagram 18
4.2. APPROXIMATE COOLING AND HEATING CAPACITIES 7.1. INDOOR UNIT 18
10 7.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 19
5 Dimensions 12

© 2002 Matsushita Electric Industrial Co., Ltd. All

rights reserved. Unauthorized copying and
distribution is a violation of law.
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

8 Wiring Diagram 20 12 Installation Instruction 64

8.1. INDOOR UNIT 20 12.1. INDOOR UNIT 64
8.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 21 12.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 70
8.3. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG) 22 12.3. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG) 73
9 Operation Details (Functions & Protection) 23 13 Servicing Information 80
9.1. INDOOR UNIT OPERATION 23 13.1. TROUBLESHOOTING 80
9.2. OUTDOOR UNIT OPERATION (CU- 13.2. SELF DIAGNOSIS DISPLAY 82
2E15CBPG/2E18CBPG) 41 13.3. DISASSEMBLY OF PARTS 88
9.3. OUTDOOR UNIT OPERATION (CU-3E23CBPG/CU- 14 Technical Data 97
4E27CBPG) 46 14.1. OPERATION CHARACTERISTICS 97
10 Installation and Servicing Air Conditioner Using R410A 15 Electronic Circuit Diagram 103
(General Information) 49 15.1. REMOTE CONTROL 103
10.1. OUTLINE 49 15.2. INDOOR UNIT 104
10.2. TOOL FOR INSTALLING / SERVICING REFRIGERANT 15.3. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 106
PIPING 50 15.4. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG) 109
10.3. REFRIGERANT PIPING WORK 54 16 Exploded View & Replacement Parts List 111
10.4. INSTALLATION, TRANSFERRING, SERVICING 56 16.1. CS-
11 Installation Information 60 ME7CKPG/ME10CKPG/ME12CKPG/ME14CKPG/ME18CK
11.1. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG) 60 PG 111
11.2. OUTDOOR UNIT (CU-3E23CBPG) 61 16.2. CU-2E15CBPG/2E18CBPG 113
11.3. OUTDOOR UNIT (CU-4E27CBPG) 62 16.3. CU-3E23CBPG 116
11.4. PIPING LENGTH 63 16.4. CU-4E27CBPG 119

2
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

1 Features
· Product
− A single OUTDOOR unit enables air conditioning of up to four separate rooms

− Inverter controlled for High energy efficiency and optimal comfort

− E - scroll compressor - guarding against global warning
− New refrigerant R410A is used for protecting ozone layer
− Recyclable design - non foamed polystyrene packing, lead - free P.C. Board
− Quiet - running OUTDOOR unit
− Luminous remote controller
− Quiet mode
− Powerful mode
− Sleep timer (7-hour delay off)
− Odour wash
− 24-hour on & off real setting timer
· Serviceability
− Self diagnosis
− Test Run at both Cooling and Heating rated frequency
− Test Run at both of INDOOR and OUTDOOR unit’s
· Quality Improvement
− Abnormal wiring or piping connection detection

2 About Lead Free Solder (PbF)

2.1. DISTINCTION OF PbF P.C. BOARD
P.C. Boards (manufactured) using lead free solder will have a PbF stamp on the P.C. Board.

2.2. CAUTION
· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70 °F (30 - 40 °C) higher.
Please use a high temperature solder iron and set it to 700 ± 20 °F (370 ± 10 °C).
· Pb free solder will tend to splash when heated too high (about 1100 °F/ 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb
solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.

3
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

3 Functions
3.1. REMOTE CONTROL

4
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

3.2. INDOOR UNIT

5
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

6
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

3.3. OUTDOOR UNIT

7
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

4 Product Specifications
4.1. PRODUCT SPECIFICATIONS
4.1.1. Indoor Unit
Model name CS-ME7CKPG CS-ME10CKPG CS-ME12CKPG CS-ME14CKPG CS-ME18CKPG
Type Wall Mounted Wall Mounted Wall Mounted Wall Mounted Wall Mounted
Power Source Single phase, 230V, 50Hz (Power supply from outdoor unit)
Air Volume (Hi) Low Cooling(Heating) m3/min. 6.1(7.2) 6.1(7.2) 6.7(8.4) 6.7(8.4) 7.6(9.2)
Medium Cooling(Heating) m3/min. 8.1(9.2) 8.1(9.2) 9.2(10.8) 9.2(10.8) 10.0(11.8)
High Cooling(Heating) m3/min. 10.1(11.2) 10.1(11.2) 11.6(11.6) 11.6(11.6) 12.1(14.4)
Noise level (Hi/Lo) Low Cooling(Heating) dB 29(29) 29(29) 32(32) 32(33) 33(35)
Sound Pressure Medium Cooling(Heating) dB 36(36) 36(36) 39(39) 39(39) 41(41)
Level
High Cooling(Heating) dB 40(40) 40(40) 44(44) 44(44) 46(46)
Sound Power Level Low Cooling(Heating) dB 42(42) 42(42) 45(45) 45(46) 46(48)
Medium Cooling(Heating) dB 49(49) 49(49) 52(52) 52(52) 54(54)
High Cooling(Heating) dB 53(53) 53(53) 57(57) 57(57) 59(59)
Piping Connection Gas side inch Half Union 3/8"
Port
(Flare piping) Liquid side inch Half Union 1/4"
Pipe Diameter Gas side inch 3/8"
Liquid side inch 1/4"
Connecting Cable (Indoor-Outdoor) Polychloroprene Sheathed 4 x 1.5mm2 Flexible Code
Dimensions Height mm 275
Width mm 770
Depth mm 230
Air Circulation Type Cross-flow Fan
Motor Type DC Brushless motor
Rated Output w 30
Fan Speed Low Cooling(Heating) rpm 860(890) 860(890) 920(1000) 920(1000) 1000(1070)
Medium Cooling(Heating) rpm 1060(1070) 1060(1070) 1170(1230) 1170(1230) 1250(1310)
High Cooling(Heating) rpm 1250(1250) 1250(1250) 1410(1450) 1410(1450) 1500(1540)
Heat Exchanger Type Plate fin configuration, forced draft type
Tube Material Copper
Fin Material Aluminium
Row/Stage 2 / 14
FPI 21
Thermostat Electronic Control
Air Filter Anti-Mold treated P.P Honeycomb
Air Purifying Filter Catechin coated Electrostatic Filter
Deodorizing Filter Charcoal coated filter
Net Weight kg 8.0

* Specifications are subject to change without notice for further improvement.

8
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

4.1.2. Outdoor Unit

Model name CU-2E15CBPG CU-2E18CBPG CU-3E23CBPG CU-4E27CBPG
Indoor-units Combination 2.2 kW + 2.2 kW 3.2 kW + 3.2 kW
2.8 kW + 3.2 kW + 3.2 kW + 3.2 kW +
4.0 kW 3.2 kW + 4.0 kW
Power Source Single phase , 230 V, 50 Hz (Power supply from outdoor unit)
Cooling Capacity kW 4.5 (1.5 - 5.0) 5.2 (1.5 - 5.4) 6.8 (2.8 - 8.4) 8.0 (3.0 - 9.2)
Operation Electrical Running Current A 5.75 7.10 8.50 8.70
Data Power Input W 1 230 (250 - 1 1 520 (250 - 1 1 950 (490 - 2 1 980 (530 - 2
350) 580) 800) 870)
EER W/W 3.66 3.42 3.49 4.04
Noise Sound Pressure dB 47 49 48 48
Level
Sound Power Level dB 62 64 61 61
Heating Capacity kW 5.4 (1.1 - 7.0) 5.6 (1.1 - 7.2) 8.6 (3.5 - 9.1) 9.4 (4.2 - 10.6)
Operation Electrical Running Current A 5.20 5.35 8.30 9.10
Data Power Input W 1 170 (210 - 1 1 210 (210 - 1 1 880 (560 - 2 2 080 (700 - 3
670) 700) 710) 060)
COP W/W 4.62 4.63 4.57 4.52
Noise Sound Pressure dB 49 51 49 49
Level
Sound Power Level dB 64 66 62 62
Maximum Current A 12.0 12.0 18.5 19.0
Starting Current A 5.75 7.10 8.50 9.10
Circuit Breaker Capacity A 15 15 20 20
Dimensions Height mm 540 540 735 908
Width mm 780 (+70) 780 (+70) 826 (+110) 900
Depth mm 289 289 300 320
Net Weight kg 38 38 57 73
Connecting Cable 3 + 1 (earth) ø1.5 mm2
Pipe Length Range (1 room) m 3 - 20 3 - 20 3 - 25 3 - 25
Maximum Pipe Length (Total room) m 30 30 50 70
Refrigerant Liquid Side mm 6.35 6.35 6.35 6.35
Pipe Gas Side mm 9.52 9.52 9.52 9.52
Diameter
Compressor Type Scroll Type Hermetically Sealed Swing Type
Motor Type DC Brushless(4-poles) DC Brushless(4-poles)
Rated Output W 1,200 1,500 1900 2200
Air Type Propeller Fan Propeller Fan
Circulation Motor Type DC Brushless(8-poles) DC Brushless(8-poles)
Rated Output W 40 53 51
Fan Speed Low rpm 690 700 680
High rpm 860 790 780
Heat Type Plate fin configuration forced draft type
Exchanger Tube Material Copper
Fin Material Aluminum
Row/Stage 2/20 2/32 2/40
FPI 16.5 18 19
Air Volume Low Cooling (Heating) m3 / --- --- 45 (45) 42 (42)
min.
High Cooling (Heating) m3 / 33.3(28.5) 34.5(31.0) 51 (47.6) 48.5 (45)
min.
Refrigerant Control Device Expansion Valve Expansion Valve
Refrigerant Oil POE(RB-68A) FOC50K(Ethers)
Refrigerant (R410A) g 1,450 2,600 3,100

* Specifications are subject to change without notice for further improvement.

9
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

4.2. APPROXIMATE COOLING AND HEATING CAPACITIES

10
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

11
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5 Dimensions
5.1. INDOOR UNIT (CS-
ME7CKPG/ME10CKPG/ME12CKPG/ME14CKPG/ME18CKPG)

12
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

13
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5.3. OUTDOOR UNIT (CU-3E23CBPG)

14
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5.4. OUTDOOR UNIT (CU-4E27CBPG)

15
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

6 Refrigeration Cycle Diagram

6.1. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

16
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

6.2. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG)

17
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

7 Block Diagram
7.1. INDOOR UNIT

18
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

7.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

19
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

8 Wiring Diagram
8.1. INDOOR UNIT

20
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

8.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

21
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

8.3. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG)

22
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9 Operation Details (Functions & Protection)

9.1. INDOOR UNIT OPERATION
9.1.1. Simultaneous Operation Control
1. Operation modes which can be selected using the remote
control unit: Automatic, Cooling, Dry, Heating, Fan operation mode.
2. Types of operations modes which can be performed
simultaneously
· Cooling operation and cooling, dehumidifying or fan operation
· Heating operation and heating operation
"Waiting" denotes the standby status in which the operation
3. Types of operation modes which cannot be performed
lamp LED blinks (ON for 2.5 sec. and OFF for 0.5 sec.), and
simultaneously
the fan is stopped.
· While a cooling operation is in progress, a heating operation
cannot be performed by an indoor unit in another room.
In the room where the operation button for cooling was pressed
first, the operation is continued. In the room where the operation
button for heating was pressed afterward, the operation lamp of
the indoor unit blinks, where the attempt is made to establish the
heating operation. Its fan is stopped, and the air does not
discharged.
· While a heating operation is in progress, a cooling operation
cannot be performed by an indoor unit in another room.
In the room where the operation button for heating was pressed
first, operation is continued. In the room where the operation
button for cooling was pressed afterward, the operation lamp of
the indoor unit blinks, where the attempt is made to establish the
cooling operation. Its fan is stopped, and the air does not
discharged. * In the fan mode, priority is transferred to a non-priority unit.
4. Operation mode priority control Note
C: Cooling operation mode
· The operation mode designated first by the indoor unit has
priority. D: Dry operation mode

· If the priority indoor unit stops operation or initiates the fan H: Heating operation mode
operation, the priority is transferred to other indoor units. F: Fan operation mode

23
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.2. Room Temperature Control (Compressor Control)

The room temperature is adjusted by changing the compressor´s operation frequency in response to the difference between setting
temperature of remote control unit and the room temperature (intake air temperature sensor).

9.1.2.1. Cooling Operation

· Thermostat OFF temperature = setting temperature of
remote control - 2 °C
· Thermostat ON temperature = setting temperature of
remote control - 2.0 °C or higher
· Thermostat goes OFF when the intake air temperature
drops below the thermostat OFF temperature.

9.1.2.2. Dry Mode Operation

9.1.2.2.1. Dry Mode Operation (Applicable Intake Temperature: 15 °C or Higher)
· Thermostat OFF temperature = setting temperature of
remote control - 3 °C
· Thermostat ON temperature = setting temperature of
remote control - 3.0 °C or higher
· Thermostat goes OFF when the intake air temperature
drops below the thermostat OFF temperature.
· When the thermostat OFF temperature is approached, the
operation mode is switched to the dry mode operation (low-
frequency operation, SLo fan speed).

9.1.2.3. Heating Operation

· Thermostat OFF temperature = setting temperature of
remote control + 1.0 °C
· Thermostat ON temperature = setting temperature of
remote control + 1.0 °C or lower
· The maximum frequency operation is approached when
operation has continued for 3 minutes at the rated
frequency operation.

24
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.3. Airflow direction Control

The vertical airflow direction louver is controlled as shown in the table below in response to the operation of the remote control air
swing button and the operating conditions.

· When the air conditioner is operated using the remote control, the vertical airflow direction louvers first open, and then move
to the angle position which has been set.
· When the power has been turned off during operation, the operation stop with the vertical airflow louver left open.
· Horizontal airflow direction louvers are operated manually. Set them manually to the desired position.

25
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.4. Indoor Fan Control

· Depending on the airflow selector button setting of the remote control unit and the operating conditions, the operations for
indoor fan control are as shown in the table below.
· Airflow control may be at variance from the airflow which has been set.

26
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

27
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.4.1. Cooling Operation

1. Automatic fan speed
This air conditioner comes with a odour removing function. When operation starts or the thermostat is set ON, the fan stops for
40 seconds. This is done in order to clean off the odour components which have accumulated on the heat exchanger using the
moisture produced by dehumidification.

2. Maximum cooling capacity

When, in order to lower the room temperature quickly for the high cooling load, the fan speed is set to high and the temperature
setting is 16 °C, the fan speed is boosted for the first 30 minutes after operation is commenced. (Fan speed will be shifted to
"SHi".)
3. Anti-dew formation control
When the anti-dew formation control is activated, the fan speed is lowered. (In door fan speed approaches the "Me".)
4. Anti-freezing control
When the temperature of the indoor unit heat exchanger drops to below 12 °C, the compressor speed is adjusted. When it
exceeds 14 °C, operation returned to normal.
5. Powerful mode operation control
At the automatic fan speed setting, operation is transferred to the automatic powerful fan speed setting. At the manual fan
speed setting, the fan speed is boosted by two steps.

6. Quiet mode operation control

At the automatic fan speed setting, operation is transferred to the automatic quiet mode fan speed setting. At the manual fan
speed setting, the fan speed is reduced by one step.

7. Forced cooling operation

When AUTO button of the indoor unit is pressed for 5 seconds, the forced cooling operation is started with high fan speed.
8. Auto operation
Operation is performed at the automatic fan speed when operation is initiated using the auto operation button or when a cooling
operation has been initiated using the remote control when a diagnostic display for the kind of trouble by which auto operation
is enabled has appeared.

28
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.4.2. Dry Mode Operation

1. Basic fan speed
In the cooling zone, the fan speed for cooling operations is used. When it reaches into the dry mode zone, operation is
performed at the SLo fan speed.
2. Automatic fan speed
During the thermostat OFF period, a stop of 90 seconds and SSLo operation for 20 seconds are repeated. When operation
starts and while the thermostat is ON, the fan is stopped for 40 seconds.

9.1.4.3. Heating Operation

1. Hot start/anti cold draft control
When operation starts, the fan is stopped if the temperature of the indoor unit heat exchanger is low. The “POWER” indication
lamp blinks at this time. As the temperature of the heat exchanger rises, the fan speed is boosted to prevent discharging the
cold air.
2. Automatic fan speed
When the automatic fan speed is selected, fan speed is determined by the difference between the room temperature and
setting temperature of remote control and by heat exchanger temperature. However, when the temperature of the heat
exchanger is low, operation is conducted at the hot start/anti-cold draft control fan speed.
3. Thermostat OFF
When the thermostat is OFF, the fan´s operation is restricted based on the temperature of the heat exchanger.
4. Powerful operation
At the automatic fan speed setting, operation is transferred to the automatic powerful fan speed. At the manual fan speed
setting, the fan speed is boosted by two steps.

5. Quiet mode control

At the automatic fan speed setting, operation is transferred to the automatic quiet mode fan speed. At the manual airflow
setting, the fan speed is reduced by one step.

6. Forced heating operation

When AUTO button of the indoor unit is pressed for 8 seconds, the forced heating operation is started with SHi fan speed.
However, when the temperature of the heat exchanger is low, operation is conducted at the hot start/anti-cold draft control fan
speed.
7. Auto operation
Operation is performed at the automatic fan speed when operation is initiated using the auto operation button or when a heating
operation has been initiated using the remote control unit when a diagnostic display for the kind of trouble by which auto
operation is enabled has appeared. However, when the temperature of the heat exchanger is low, operation is conducted at the
hot start/anti-cold draft control fan speed.

29
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.5. Automatic Operation

· The operation mode (cooling, dry or heating) is selected automatically.
· The operation mode is first selected when operation starts and re-selected after each 3-hours period. The temperature, fan
speed and airflow direction are set using the remote control.

9.1.5.1. Selecting the Operation Mode

When the Automatic mode is selected, the operation mode is decided in accordance to remote control setting temperature, intake
air temperature and outdoor air temperature.
· During judging the operation mode, indoor fan is running at Lo-speed and outdoor fan at ON in order to sense the indoor intake
air temperature and outdoor air temperature for 20 seconds. At this time, Power LED is blinking. After the operation mode is
selected, Power LED light up.
There are 4 determination charts when automatic mode is selected.

30
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

· When the operation mode is changed over, the value for t1, t2 and t3 are shifted as follows:
Cooling/Soft dry → Heating: -2 °C
Heating → Cooling/Soft dry: +2 °C
· When the indoor intake air temperature is lower than 16 °C, heating operation is immediately started.
· When the outdoor air temperature is more than 25 °C, and the intake air temperature is over 16 °C, cooling operation is
immediately started.
· The operation mode is judged every 3 hours.

9.1.5.2. Temperature Shift

· When the operation mode (Heating, Cooling or Soft Dry) is decided, the internal setting temperature will shift as shown below:

9.1.6. Sleep Timer / Sleep Operation Mode

· When the sleep timer is set using the remote control, the air conditioner will stop after the set time (1, 2, 3, 5 or 7 hours) has
elapsed.
Remaining time of the remote control unit is displayed in 1-hour increments. When the set time is reached, the remaining time
display is cleared.
· When the sleep timer is set to 5 or 7 hours, sleep mode operation is activated after 3 hours.
· When the sleep mode operation is activated, the compressor operation frequency and outdoor fan speed are reduced to quiet
down the noise of the outdoor unit.
1. Sleep mode operation during cooling and dry operation

31
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

2. Sleep mode operation during heating operation

9.1.7. Timer Operation

Delay ON/OFF timer
· In accordance with the air-conditioning load, the preparatory operation is performed so that the setting temperature will be
reached at the set time. The preparatory operation period is fixed as shown in the table below.
· 60 minutes before the set time, the indoor fan operates at SLo and outdoor fan operates for 30 seconds to sample the indoor
intake air temperature and outdoor air temperature in order to determine the starting time for preparatory operation. (Operation
LED blinks. Timer LED lights.)
· The fan speed and air direction during the preparatory operation are based on the remote control settings (same as with normal
operation). However, at the automatic airflow setting, the fan speed setting is never raised above "Lo".
· Timer setting method
Type Set time
Setting range 0 : 00 - 23 : 50
Delay ON timer Increment 10 minutes
preparatory operation ●
Daily function ●
Type Set time Single action
Setting range 0 : 00 - 23 : 50 1, 2,3, 5 or 7 hours
Delay OFF timer Interval 10 minutes ---
preparatory operation --- ---

· During the preparatory operation, the compressor operation frequency and outdoor fan speed are reduced to reduce the noise
of the outdoor unit.
· Delay ON timer preparatory operation time

32
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.8. Filter Cleaning Indicator

· The blinking filter lamp warns the user that the air filter is dirty. When
the air conditioner has operated for a total of 360 hours or so, this lamp
blinks during cooling and heating operation and stop.
· The blinking filter lamp is turned off by pressing the filter reset button.
· The total operating time of the air conditioner is stored in the memory
after each hour elapses.
(Operation is detected by the change in the fan speed of the indoor
unit fan motor.)
· The total operating time data in the memory is not erased even when
the power is turned off.
· The time can be reset by the remote control unit even during stopping.

9.1.9. Odour Wash Operation

· The odour particles which have accumulated on the heat exchanger during fan and heating operations are volatilized and
cleaned off.

9.1.9.1. Odour Removing Mode Operation (In Season)

· Whether the odour removing mode is ON or OFF is indicated by the odour wash lamp which is lighted or off.

· This function works during cooling and dry mode operations at the automatic fan speed setting performed in season.

33
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.9.2. Odour Clear Mode Operation (Off-Season)

· By conducting heating operations simultaneously in all the rooms for a short period of time, the odour components are removed,
the insides of the indoor units are dried out, and the growth of mold is minimized. Odour clear control has two operation modes:
odour clear mode (without timer setting) that minimizes the growth of mold, and odour clear mode (with timer setting) which
mobilizes a specialized function for removing odour components.

· Odour clear mode

The odour clear mode of all rooms are carried out by setting the odour clear mode of one room.

(1) Odour clear mode operation (without timer setting)

· The POWER lamp lights if the air conditioner is operated before the odour clear operation, and it goes off if air conditioner has
been stop.
· Operation is switched to odour removing control 20 minutes after the odour clear operation started.

· Time chart

34
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

(2) Odour clear mode operation (with timer setting)

· The POWER lamp lights up if the air conditioner is operated before the odour clear operation, and it goes off if air conditioner
has been stop.
· Operation is switched to odour removing control 50 minutes after the odour clear operation started.

· Time chart

35
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.10. Auto Restart Control

· if there is a power failure, operation will automatically be restarted when the power is resumed. It will start with the previous
operation mode and airflow direction. (Time Delay Safety Control is valid)
1. Control start conditions
<1> The 24-hour timer must not be set.
<2> The sleep timer must not be set.

Auto restart control is not available when timer or sleep mode is set.

2. Description of control
<1> In the case of manual operation, the operation mode, temperature setting, fan speed and airflow direction before the power
is turned off are restored.
<2> In the case of automatic operation, after the power is restored operation starts with the determination of the mode.
<3> While the air conditioner odour clear timer has been set, the setting is cancelled, and operation is transferred to the mode
before the power is turned off.
<4> While the air conditioner odour clear operation (with timer / without timer setting) are being performed, both of these
operations are completed, and operation is transferred to the operation mode prior to these operations.

Example: When the power is turned off during an outdoor unit cooling operation

36
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.11. Other Indoor Unit Operation Functions

· Auto button
Proceed with operation when the air conditioner is stopped.
(When the auto button is pressed during operation, the air conditioner is stopped.)

1. Emergency operation
Press the auto button and release it within 5 seconds to perform emergency operation.
Under normal condition (failure is not occurred) automatic operation is performed. In the event of a failure that still enables
operation to be performed, emergency operation is performed.

2. Forced cooling operation

Press the auto button about 5-8 seconds (1 beep sound) to perform the forced cooling operation.
The air conditioner does not operate for 2 minutes if the room temperature is low (intake temperature below 16 °C)
so just wait. The forced operation is performed after the 2 minutes have elapsed.

3. Forced heating operation

Press the auto button about 8-11 seconds (2 beeps sound) to perform the forced heating operation.

4. Setting modes (Remote control transmission code, current switching mode)

The remote control transmission code selection mode is established by pressing the AUTO button about 11-16 seconds (3
beeps sound). Now remove the remote control unit´s battery cover, and short the "Setting" terminals to establish the current
switching mode.

■ CHANGING THE REMOTE CONTROL TRANSMISSION CODE

− When installing two air conditioners in one room, each air conditioner can be synchronized to the remote control.
In order to operate separately, open the rear cover of one of the remote control and set to “B”.

Set “B” on the remote control.

This can be achieved by cutting the jumper wire of the remote control with a cutter.

37
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Setting the air conditioner unit to “B”

1. Press the “AUTO” button for about 11 to 15 seconds. When you hear three short beeps “pep, pep, pep”, release the
button.
Note: you will hear one beep “pep” in about 5 seconds, and then two beeps “pep, pep” in about 8 seconds.
2. Press again the “AUTO” button within 60 seconds. Every press the “AUTO” button, you pressing the “AUTO” button,
which achieves “B” setting.
If you stop pressing the “AUTO” button midway at the short beep “pep”, this will achieve “A” setting.
3. After 60 seconds or longer of the above setting, use the “B” set remote control to confirm successful operation.
4. Set, A, B, C or D transmission code at remote control. (Fig.1)

5. Press auto button 11 to 15 seconds, of indoor unit.

6. Transmit the signal from remote control to indoor unit.

5. Odour clear setting mode

The odour clear inhibit mode is established by pressing the AUTO button 16-21 seconds (4 beeps sound).

6. Individual setting mode

The H14 error detection selection mode is established by pressing the auto button about for 21 seconds (5 beeps sound).
Now remove the remote control unit´s battery cover, and short the "SET" terminals to establish the beep sound mute mode.

* If the auto button is pressed and 26 seconds or so are allowed to elapse, the auto button operation mode is
restored. When nothing happens for 60 seconds in the "Setting mode", "Odour clear setting mode" or "individual
setting mode" or if a remote control code is received, the mode concerned is canceled.

38
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.12. Self Diagnosis display

The diagnostic displays that appear when trouble has occurred can be checked using the remote control unit.
When trouble occurs, operation is stopped automatically, and the timer lamp blinks. The diagnosis time has been reduced by
warning the user by means of the blinking of the timer lamp.
· When trouble occurs, operation is stopped automatically, and the timer
lamp blinks.
· The timer lamp will go off if the power is turned off, but it will start
blinking again if the air conditioner is operated with the trouble left
unremedied.
· No diagnostic displays will appear when the unit is operated after the
trouble has been remedied. However, the last diagnostic symbol is
stored in the IC´s memory. (This symbol can be cleared.)
· When the air conditioner protection operation is triggered because the
air conditioner is being operated under overload conditions, its heat
radiation is being interfered with or anti-freezing operation is initiated or
because its supply voltage has dropped or its power has been turned
off and then back on during operation, for instance, no diagnostic
displays will appear. However, F99 and other such information are
stored in the IC´s memory: this is normal and not indicative of
malfunctioning.

· The diagnostic displays appear automatically when trouble

occurs.
1. Operation is stopped automatically.
2. The timer lamp of the display unit on the right side of the indoor
unit blinks.
3. The timer lamp goes off when the power is turned off.
· To display the trouble (or protection operation) status stored in
the memory
1. Turn on the power.
2. Open the remote control unit´s door, and press the timer setting
"UP-ARROW" button for 5 seconds.
3. Press the "UP-ARROW" button slowly and repeatedly until 4
beeps are heard continuously from the indoor unit.
4. The 3-digit alphanumeric display on the remote control unit
indicates the trouble which has occurred.
* If the 3-digit alphanumeric display on the remote control unit
and the nature of the trouble match, the operation lamp
(green) will light.
· To clear the trouble (or protection operation) status stored in the
memory after remedial action has been taken
1. The air conditioner is reset by turning its power off and back on.
* If it is not reset by turning its power off and back on, remove
the battery cover from the remote control unit. The air
conditioner can then be forcibly reset by shorting the
"RESET" terminals toward the main unit (one receiving beep).

· Concerning emergency operation (which can be performed in

some of the trouble conditions)
1. Using the remote control unit, select COOL or HEAT, and press
the operation OFF/ON button. (4 receiving beeps are heard, and
the timer lamp blinks.)
2. The air conditioner can now be used temporarily until its trouble is
remedied.

39
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.1.12.1. Error Cord

Diagnostic Display Abnormality or Protection control Works
H 11 Indoor/Outdoor abnormal communication
H 12 Indoor unit capacity unmatched
H 14 Intake air temp.sensor
H 16 Outdoor Current Transformer
H 19 Indoor fan motor mechanism lock
H 23 Indoor heat exchanger temp.sensor
H 27 Outdoor air temp.sensor
H 28 Outdoor heat exchanger temp.sensor 1
H 30 Outdoor discharge pipe temp.sensor
H 32 Outdoor heat exchanger temp.sensor 2
H 34 Outdoor heat sink temp.sensor
H 36 Abnormal gas pipe temp.sensor
H 37 Outdoor liquid pipe temp.sensor
H 39 Abnormal indoor operating unit or standby units
H 41 Abnormal wiring or piping connection
H 97 Outdoor fan motor mechanism lock
H 98 Indoor high pressure protection
H 99 Indoor operating unit freezing
F 11 4-way valve switching failure
F 17 Indoor standby units freezing
F 90 PFC circuit protection
F 91 Refrigeration cycle abnormality
F 93 Compressor abnormal revolution
F 95 Outdoor high pressure protection
F 96 Power transistor module or compressor overheating
F 97 Compressor high discharge temperature
F 98 Total running current protection
F 99 DC peak detection

40
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.2. OUTDOOR UNIT OPERATION (CU-2E15CBPG/2E18CBPG)

9.2.1. Compressor Operation Frequent
9.2.1.1. Cooling, Dry and Heating Operations
· The compressor operation frequency is determined by room
temperature, capacity rank algebra and model code algebra.
1. When operation is started after the air conditioner has been
stopped for more than one hour, the air conditioner operates at a
high frequency which lowers the room temperature quickly for
cooling (or raises it quickly for heating) .
2. If, when two or more indoor units are operating, the thermostat is
set to OFF in one room, the automatic expansion valve is closed to
adjust the flow of refrigerant so as to control the room temperature.
3. When the thermostat is set to OFF during 1-room operation, the
compressor and fan of the outdoor unit are stopped. (The outdoor
unit fan is stopped 30 seconds after the compressor.)
4. It takes about 180 seconds to restart operation when the
compressor has been stopped. (Time delay safety control)

9.2.2. Deice Operation (Fuzzy Control) <Heating>

· The extent of the frost is estimated from the operating time, temperature of the outdoor heat exchanger and outside air
temperature.
· Highly efficient deice operation coped with to the frost condition is performed.
1. When the temperature of the outdoor unit heat exchanger falls below 3 °C, the de-icing timer is activated. When it comes
below the operation temperature continuously for 3 minutes after the timer setting has been reached, the deice operation
is started.
2. The 4-way valve is switched, and the frost is thawed out in the cooling cycle.
3. De-icing ends about 12 minutes after it started or when the temperature of the heat exchanger rises above 25 °C.

41
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.2.3. Protection Control

9.2.3.1. Time Delay Safety Control

· The compressor does not restart for 3 minutes after stop of compressor.

9.2.3.2. Total Running Current Control

1. When the air conditioner has been operated at the capacity designated by the indoor unit and the total running current exceeds
setting I1, the operating frequency of the compressor is reduced. Conversely, when the total current drops below setting I1, it
is increased (but only up to the capacity designated by the indoor unit).
2. The compressor is stopped as soon as the total current exceeds setting I2.
3. If the compressor is stop by the total running current control on 3 occasions in a 20-minute period, the "F98" error is displayed.
Setting CU-2E15CBPG/2E18CBPG
Dry-Cooling I1 9.0A
I2 15.0A
Heating I1 12.5A
I2 17.0A

9.2.3.3. IPM Protection Control (DC Peak)

9.2.3.3.1. D.C. Peak
· When the inverter load current (DC peak current) exceeds the setting value (22.5A), the compressor is stopped immediately.
If this happens within 30 seconds after it started operating, it will restart one minute later; if it happens after 30 seconds have
elapsed since it started operating, it will restart 3 minute later.
· If the DC peak current exceeds the setting value on 7 consecutive occasions within 30 seconds after the compressor started
operating, the "F99" error is displayed, and the unit operation is stopped.

9.2.3.3.2. IPM Overheating Prevention Control

· The compressor is stopped when the overheating protection circuit inside the IPM has been activated. It restarts after 3
minutes.
Activation temperature: 110 °C Reset temperature: 95 °C

9.2.3.4. Compressor Overheat Protection Control

1. When the compressor discharge temperature exceeds 105 °C, compressor frequency control (including expansion valve
control) is conducted.

· If the compressor stopping in response to that the temperature of the compressor discharge temperature exceeds 112 °C
on 3 occasions during a 30-minute period, timer LED blinks. (F97: compressor overheat)

42
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.2.3.5. Over Load Protection Control (Cooling . Dry Mode)

· Cooling over load protection control
1. When the temperature of the outdoor unit heat exchanger exceeds 52 °C during a cooling or dehumidifying operation, the
compressor frequency is restricted, and when it exceeds 62 °C, the compressor is stopped. (Time delay safety control is
conducted.)
2. If the compressor stooping in response to this control on 4 occasions during a 20-minute period, the indoor timer lamp
blinks. (F95: outdoor high pressure protection)

· Heating over load protection control

1. When the temperature of the indoor unit heat exchanger exceeds 50 °C during a heating operation, the compressor
frequency is restricted; furthermore, when it exceeds 62 °C, the compressor is stopped, and time delay safety control is then
conducted. (H98)

9.2.3.6. Low Pressure Control (Gas Leakage Protection)

· When the following conditions as shown in the below table occur for 5 minutes, the compressor stops and restarts after 3
minutes. If this phenomenon is continuously occurring twice within 20 minutes, the air conditioner will stop operation and the
Timer LED blinks. (F91: Refrigeration cycle abnormality.)

Note:
The above conditions are not valid during Deice operation.
● this conditions are continuous for 5 minutes.

43
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.2.3.7. 4-way Valve Failure Protection Control (Cooling/Heating Switching Errors)

· During a cooling operation
1. If the temperature of the indoor unit heat exchanger exceeds 45 °C 4 minutes after the compressor started, the compressor
is stop. (It restarts 3 minutes later → Time delay safety control.)
2. If this happens on 4 occasions in a 30-minute period, timer lamp blinks. ("F11" error)
· During a heating operation
1. If the temperature of the indoor unit heat exchanger drops below 5 °C 4 minutes after the compressor started, the
compressor is stopped. (It restarts 3 minutes later → Time delay safety control.)
2. If this happens on 4 occasions in a 30-minute period, timer lamp blinks. ("F11" error)

9.2.3.8. Outdoor Air Temperature Control

· The compressor operating frequency is regulated in accordance to the outdoor air temperature.

· This control is not applicable during minimum frequency operation protection control, deice operation, pump down operation.

44
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.2.4. Abnormal Wiring or Piping Connection Checking Control

1. Objective
To check for Abnormal Wiring or Piping connections during a cooling operation after the air conditioner has been installed.
2. Detection subjects
Heat exchanger temperature of indoor unit which is not operating, and outdoor unit gas pipe temperature
3. Condition of control
· The compressor is turned ON by the forced cooling operation after the power was turned on
· After compressor started 3 minutes, the gas pipe temperature of the non-operated indoor unit dropped by more than 5 °C
· The outdoor air temperature is more than 5 °C
· A non-operated unit is present
When above conditions are satisfied all, the timer lamp blinks. (H41 error)

9.2.5. Pump Down Control (Forced Cooling Operation)

· By shorting the "CN-S" terminals on the outdoor unit P.C. Board, the
air conditioner can be made to operate in the cooling mode regardless
of what is designated by the indoor unit.
* If the shorting of the terminals is released, the compressor is
stopped immediately. Three minutes later, it is operated
according to designation of indoor unit.

Minimum frequency operation protection

· When the compressor operates at less than 30Hz for 60
minutes, the operating frequency will increase to 35Hz for 4
minutes.

45
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.3. OUTDOOR UNIT OPERATION (CU-3E23CBPG/CU-4E27CBPG)

9.3.1. Room Temperature Control
9.3.1.1. Cooling, Dry and Heating Operations
Concerning CU-3E23CBPG and CU-4E27CBPG compressor frequency control
1. Immediately after the compressor has started up during an ongoing operation, the initial frequency is determined on the
basis of the information obtained from the heat exchanger capacities of the indoor units (thermostat ON) and the airflows
set by their remote controls.
2. During an ongoing operation, the difference between the temperature set in each of the rooms and the room temperature
is detected, the total load is calculated, and the compressor frequency is determined on the basis of this information.
3. When one room turns the thermostat OFF while two or more indoor units are operating, the automatic expansion valve
closes to restrict the flow of refrigerant, the compressor control is temporarily suspended, and both the initial frequency and
total load are determined again.
4. When the thermostat is turned OFF during 1-room operation, the outdoor unit´s compressor and fan stop. (The outdoor
unit’s fan stops 60 seconds after the compressor.)
5. It takes about 180 seconds for the compressor to be restarted after it has stopped. (Re-start control)

9.3.2. Deice Operation Control <Heating>

1. When the temperature of the heat exchanger drops below the deice operation start temperature during a heating operation,
deice operation is started, and when it rises above the release temperature, deice operation is released.
2. To prevent needless deicing or excessively long deicing, the deice operation start temperature is changed each time in such a
way that deicing is completed in the specified time.
· Specified time: 4 to 7 minutes
· When the time required for deicing is longer than the specified time, the deice operation start temperature is raised by 1 °C.
· When the time required for deicing is shorter than the specified time, the deice operation start temperature is lowered by 1
°C.
· The start temperature is changed in the range of -3 to -15.5 °C.
3. Deice operation is not performed during the guarded periods given below.
· For a cumulative total of 35 minutes after operation started and after deicing was completed
· For 5 minutes after the compressor started
4. In order to reduce the noise of the 4-way valve switching, the switching is done after the compressor has been stopped
temporary.
5. The deicing time is at most 10 minutes.

46
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.3.3. Forced Cooling Operation Control

· Forced cooling operations can be performed by the outdoor unit.
1. Set the operation mode setting switch (SW2) to COOL.
2. The forced cooling operation is performed when the forced operation
switch (SW1) is pressed.
* The forced cooling operation stops when the forced operation
switch (SW1) is pressed again.

47
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9.3.4. Wiring Error Check Control

The useful wiring error check function automatically corrects Basic knowledge
wiring errors using a microcomputer. · The principle operation of this function is as follows: The
In cases where wires are embedded or the locations of refrigerant flows in succession from the port A, and by
connecting wires are not known for other reasons, for instance, detecting the temperature of the indoor unit heat
pressing the wiring error check switch inside the right side exchanger sensor, the connected pipes and wires are
panel of the outdoor unit enables operation as is even if the collated.
wires to room A are connected to room B by mistake. Wiring · The sound of ice forming (a crackling noise) may be
error checks cannot be performed in the following situations: heard from the indoor unit while this function is
· For about 30 seconds (during the initial settings) after the operating: this is normal and not indicative of a
power was turned on malfunction. (This phenomenon occurs because the
· During the 3-minute standby after the compressor has heat exchanger temperature is lowered to 0 °C or below
stopped in order to improve the detection accuracy.)
· When the outside air temperature is below 5 °C · The indoor fan is also set to ON and OFF at the same
time.
· When trouble has occurred in the indoor unit (including
trouble in transmission to all rooms) ■ How to check the information currently stored in the
microcomputer
This function need not be used if the correct piping and
wiring are completely done. This information can be checked by observing the blinking
of the LEDs on the service monitor upon completion of the
■ Operation method
wiring error check, during forced operation or after stopped.
1. Remove the service panel (right side panel). (5 screws)
LED1: Wiring room A, LED2: wiring room B
2. Press the writing error check switch on the service
The first LED to blink denotes the piping port A and the
monitor P.C. Board to start the writing error check
second LED denotes the piping port B.
operation.
The LED which has lighted first denotes the room whose
3. The writing error check is automatically completed in
wiring is connected to the piping port A, and the next LED
about 10 to 15 minutes.
denotes the port B.
4. When the faulty wiring check is completed, the service
<Example> When the LEDs blink as shown below
monitor LEDs blink.
LED 1 2 3 4 Judgement
Display All LEDs Blinking Automatic Correction cannot
blink be done.
Blink in Off Automatic Correction have
sequence been implemented.

Automatic correction have been implemented: LEDs 1, 2 and 3

blink in sequence (LED4 is off).
Automatic correction cannot be done: LEDs 1 to 4 blink
simultaneously to indicate:
· A transmission problem in one of the indoor units
· A disconnected heat exchanger thermistor in an indoor unit The LEDs in this figure denote that the piping port A has
been connected (automatically corrected) to the wiring
· Trouble in an indoor unit (when the trouble has occurred
room B and that the piping port B has been connected
during the wiring error check)
(automatically corrected) to the wiring room A.
Trouble stopping: One of the LEDs 1 to 4 lights.
Precautions
1. About 10 to 15 minutes are required to conduct the
check after the wiring error switch is pressed.
(Only wiring error between an unit A and unit B cannot
be corrected.)
2. If liquid pipes and gas pipe connected to different unit it
cannot be corrected "automatically", be absolutely sure
to run the liquid pipes and gas pipes in pairs.
3. If the wiring error check switch is pressed again during
a wiring error check, the wiring error check can be
forcibly terminated. In this case, what is stored in the
microcomputer will be the initial statuses (wiring room A
→ piping A port, wiring room B → piping B port).
4. The wiring error check function MUST be used when
the outdoor unit P.C. Board is replaced.

48
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

10 Installation and Servicing Air Conditioner Using R410A

(General Information)
10.1. OUTLINE
10.1.1. About R410A Refrigerant
1. Converting air conditioners to R410A
Since it was declared in1974 that chlorofluorocarbons (CFC), hydro chlorofluorocarbons (HCFC) and other substances pose a
destructive danger to the ozone layer in the earth s upper stratosphere (20 to 40 km above the earth), measures have been
taken around the world to prevent this destruction.
The R22 refrigerant which has conventionally been used in ACs is an HCFC refrigerant and, therefore, possesses this ozone-
destroying potential. International regulations (the Montreal Protocol Ozone-Damaging Substances) and the domestic laws of
various countries call for the early substitution of R22 by a refrigerant which will not harm the ozone layer.
· In ACs, the HFC refrigerant which has become the mainstream alternative called R410A.Compared with R22, the pressure
of R410A is approximately 1.6 times as high at the same refrigerant temperature, but the energy efficiency is about the
same. Consisting of hydrogen (H), fluorine (F) and carbon (C), R410A is an HFC refrigerant. Another typical HFC refrigerant
is R407C. While the energy efficiency of R407C is some what inferior to that of R410A, it offers the advantage of having
pressure characteristics which are about the same as those of R22, and is used mainly in packaged ACs.

2. The characteristics of HFC (R410A) refrigerants

a. Chemical characteristics
The chemical characteristics of R410A are similar to those of R22 in that both are chemically stable, non-flammable
refrigerants with low toxicity.
However, just like R22, the specific gravity of R410A gas is heavier than that of air. Because of this, it can cause an oxygen
deficiency if it leaks into a closed room since it collects in the lower area of the room. It also generates toxic gas when it is
directly exposed to a flame, so it must be used in a well ventilated environment where it will not collect.

Table 1 Physical comparison of R410A and R22

R410A R22
Composition (wt%) R32/R125 (50/50) R22 (100)
Boiling point (°C) -51.4 -40.8
Vaporizing pressure (25°C) 1.56 Mpa (15.9 kgf/cm2) 0.94 Mpa (9.6 kgf/cm2)
Saturated vapor density 64.0 kg/m3 44.4 kg/m3
Flammability Non-flammable Non-flammable
Ozone-destroying point (ODP) 0 0.005
Global-warming point (GWP) 1730 1700

b. Compositional change (pseudo-azeotropic characteristics)

R410A is a pseudo-azeotropic mixture comprising the two components R32 and R125. Multi-component refrigerants with
these chemical characteristics exhibit little compositional change even from phase changes due to vaporization 9or
condensation), which means that there is little change in the circulating refrigerant composition even when the refrigerant
leaks from the gaseous section of the piping.
Accordingly, R410A can be handled in almost the same manner as the single-component refrigerant R22. However, when
charging, because there is a slight change in composition between the gas phase and the liquid phase inside a cylinder or
other container, charging should basically begin with the liquid side.
c. Pressure characteristics
As seen in Table 2, the gas pressure of R410A is approximately 1.6 times as high as that of R22 at the same refrigerant
temperature, which means that special R410A tools and materials with high-pressure specifications must be used for all
refrigerant piping work and servicing.

Table 2 Comparison of R410A and R22 saturated vapor density

Unit: MPa
Refrigerant Temperature (°C) R410A R22
-20 0.30 0.14
0 0.70 0.40
20 1.35 0.81
40 2.32 1.43
60 3.73 2.33
65 4.15 2.60

49
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

d. R410A refrigerating machine oil

Conventionally, mineral oil or a synthetic oil such as alkylbenzene has been used for R22 refrigerating machine oil. Because
of the poor compatibility between R410A and conventional oils like mineral oil, however, there is a tendency for the
refrigerating machine oil to collect in the refrigerating cycle. For this reason, polyester and other synthetic oils which have
a high compatibility with R410A are used as refrigerating machine oil.
Because of the high hygroscopic property of synthetic oil, more care must be taken in its handling than was necessary with
conventional refrigerating machine oils. Also, these synthetic oils will degrade if mixed with mineral oil or alkylbenzene,
causing clogging in capillary tubes or compressor malfunction. Do not mix them under any circumstances.

10.1.2. Safety Measure When Installing / Receiving Refrigerant Piping

Cause the gas pressure of R410A is approximately 1.6 times as high as that of R22, a mistake in installation or servicing could
result in a major accident. It is essential that you use R410a tools and materials, and that you observe the following precautions
to ensure safety.
1. Do not use any refrigerant other than R410A in ACs that have been used with R410A.
2. If any refrigerant gas leaks while you are working, ventilate the room. Toxic gas may be generated if refrigerant gas is exposed
to a direct flame.
3. When installing or transferring an AC, do not allow any air or substance other than R410A to mix into the refrigeration cycle. If
it does, the pressure in the refrigeration cycle can become abnormally high, possibly causing an explosion and/or injury.
4. After finishing the installation, check to make sure there is no refrigerant gas leaking.
5. When installing or transferring an AC, follow the instructions in the installation instructions carefully. Incorrect installation can
result in an abnormal refrigeration cycle or water leakage, electric shock, fire, etc.
6. Do not perform any alterations on the AC unit under any circumstances. Have all repair work done by a specialist. Incorrect
repairs can result in an water leakage, electric shock, fire, etc.

10.2. TOOL FOR INSTALLING / SERVICING REFRIGERANT PIPING

10.2.1. Necessary Tools
In order to prevent an R410A AC from mistakenly being charged with any other refrigerant, the diameter of the 3-way valve service
port on the outdoor unit has been changed. Also, to increase its ability to withstand pressure, the opposing dimensions have been
changed for the refrigerant pipe flaring size and flare nut. Accordingly, when installing or servicing refrigerant piping, you must have
both the R410A and ordinary tools listed below.
Table 3 Tools for installation, transferring or replacement
Type of work Ordinary tools R410A tools
Flaring Flaring tool (clutch type), pipe cutter, Copper pipe gauge for clearance
reamer Adjustment, flaring tool (clutch type)*1)
Bending, connecting pipes Torque wrench (nominal diameter 1/4,
3/8,1/2) Fixed spanner (opposing sides 12
mm, 17 mm, 19 mm) Adjustable wrench,
Spring bender
Air purging Vacuum pump Hexagonal wrench Manifold gauge, charging hose, vacuum
(opposing sides 4 mm) pump adaptor
Gas leak inspection Gas leak inspection fluid or soapy water Electric gas leak detector for HFC
refrigerant*2)

*1) You can use the conventional (R22) flaring tool. If you need to buy a new tool, buy the R410A type.
*2) Use when it is necessary to detect small gas leaks.
For other installation work, you should have the usual tools, such as screwdrivers (+,-), a metal-cutting saw, an electrical drill, a hole
core drill (65 or 70 dia.), a tape measure, a level, a thermometer, a clamp meter, an insulation tester, a voltmeter, etc.
Table 4 Tools for serving
Type of work Ordinary tools R410A tools
Refrigerant charging Electronic scale for refrigerant charging
Refrigerant cylinder Charging orifice and
packing for refrigerant cylinder
Brazing (Replacing refrigerating cycle Nitrogen blow set (be sure to use nitrogen
part*1) blowing for all brazing), and brazing), and
brazing machine

*1) Always replace the dryer of the outdoor unit at the same time. The replacement dryer is wrapped in a vacuum pack. Replace
it last among the refrigerating cycle parts. Start brazing as soon as you have opened the vacuum pack, and begin the vacuuming
operation within 2 hours.

50
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

10.2.2. R410A Tools

1. Cooper tube gauge for clearance adjustment
(used when flaring with the conventional flaring tool (clutch
type))
· This gauge makes it easy to set the clearance for the
copper tube to 1.0-1.5 mm from the clamp bar of the
flaring tool.

Fig. 1 Copper tube gauge for clearance adjustment

2. Flaring tool (clutch type)

· In the R410A flaring tool, the receiving hole for the
clamp bar is enlarged so the clearance from the clamp
bar can be set to 0-0.5 mm, and the spring inside the
tool is strengthened to increase the strength of the pipe-
expanding torque. This flaring tools can also be used
with R22 piping, so we recommend that you select it if
you are buying a new flaring tool.

Fig. 2 Flaring tool (clutch type)

3. Torque wrenches

Fig. 3 Torque wrenches

Table 5
Conventional wrenches R410A wrenches
For 1/4 (opposite side x torque) 17 mm x 18 N.m (180 kgf.cm) 17 mm x 18 N.m (180 kgf.cm)
For 3/3 (opposite side x torque) 22 mm x 42 N.m (180 kgf.cm) 22 mm x 42 N.m (180 kgf.cm)
For 1/2 (opposite side x torque) 24 mm x 55 N.m (180 kgf.cm) 26 mm x 55 N.m (180 kgf.cm)

4. Manifold gauge
· Because the pressure is higher for the R410A type, the conventional type cannot be used.
Table 6 Difference between R410A and conventional high / low-pressure gauges
Conventional wrenches R410A wrenches
High-pressure gauge (red) -76 cmHg - 35 kgf/cm3 -0.1 - 5.3 Mpa -76 cmHg - 53 kgf/cm 3
High-pressure gauge (blue) -76 cmHg - 17 kgf/cm3 -0.1 - 3.8 Mpa -76 cmHg - 38 kgf/cm 3

· The shape of the manifold ports has been changed to prevent the possibility of mistakenly charging with another type of
refrigerant.
Table 7 Difference between R410A and conventional manifold port size
Conventional gauges R410A gauges
Port size 7/6 UNF 20 threads 1/2 UNF 20 threads

51
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5. Charging hose
· The pressure resistance of the charging hose has been
raised to match the higher pressure of R410A. The hose
material has also been changed to suit HFC use, and
the size of the fitting has been changed to match the
manifold ports.

Fig. 4 Manifold gauge charging hose

Table 8 Difference between R410A and conventional charging hoses

Conventional hoses R410A hoses
Pressure Working pressure 3.4 MPa (35 kgf/cm 3) 5.1 MPa (52 kgf/cm 3)
resistance Bursting pressure 17.2 MPa (175 kgf/cm3) 27.4 MPa (280 kgf/cm3)
Material NBR rubber HNBR rubber Nylon coating inside

6. Vacuum pump adaptor

· When using a vacuum pump for R410A, it is necessary
to install an electromagnetic valve to prevent the
vacuum pump oil from flowing back into the charging
hose. The vacuum pump adaptor is installed for that
purpose. if the vacuum pump oil (mineral oil) becomes
mixed with R410A, it will damage the unit.

Fig. 5 Vacuum pump adaptor

7. Electric gas leak detector for HFC refrigerant

· The leak detector and halide torch that were used with
CFC and HCFC cannot be used with R410A (because
there is no chlorine in the refrigerant).
· The present R134a leak detector can be used, but the
detection sensitivity will be lower (setting the sensitivity
for R134a at 1, the level for R410A will drop to 0.6).
· For detecting small amounts of gas leakage, use the Fig. 6 Electric gas leak detector for HFC refrigerant
electric gas leak detector for HFC refrigerant. (Detection
sensitivity with R410A is about 23 g/year).

52
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

8. Electronic scale for refrigerant charging

· Because of the high pressure and fast vaporizing speed
of R410A, the refrigerant cannot be held in a liquid
phase inside the charging cylinder when charging is
done using the charging cylinder method, causing
bubbles to form in the measurement scale glass and
making it difficult to see the reading. (Naturally, the
conventional R22 charging cylinder cannot be used
because of the differences in the pressure resistance,
scale gradation, connecting port size, etc.)
· The electronic scale has been strengthened by using a
structure in which the weight detector for the refrigerant
cylinder is held by four supports. It is also equipped with
Fig. 7 Electronic scale for refrigerant charging
two connection ports, one for R22 *7/16 UNF, 20
threads) and one for R410A (1/2 UNF, 20 threads), so
it can also be used for conventional refrigerant charging.
· There are two types of electronic scales, one for 10-kg
cylinders and one for 20-kg cylinders. (The 10-kg
cylinder is recommended.)
Refrigerant charging is done manually by opening and
closing the valve.

9. Refrigerant cylinders
· The R410A cylinders are labeled with the refrigerant
name, and the coating color of the cylinder protector is
pink, which is the color stipulated by ARI of the U.S.
· Cylinder equipped with a siphon tube are available to
allow the cylinder to stand upright for liquid refrigerant
charging.

Fig. 8 Refrigerant cylinders

10. Charging orifice and packing for refrigerant cylinders

· The charging orifice must match the size of the charging
hose fitting (1/2 UNF, 20 threads).
· The packing must also be made of an HFC-resistant
material.

Fig. 9 Charging orifice and packing

10.2.3. R410A Tools Which are Usable for R22 Models

Table 9 R410A tools which are usable for R22 models
R410A tools Usable for R22 models
(1) Copper tube gauge for clearance adjustment OK
(2) Flaring tool (clutch type) OK
(3) Manifold gauge NG
(4) Charging hose NG
(5) Vacuum pump adaptor OK
(6) Electric gas leak detector for HFC refrigerant NG
(7) Electronic scale for refrigerant charging OK
(8) Refrigerant cylinder NG
(9) Charging orifice and packing for refrigerant cylinder NG

53
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

10.3. REFRIGERANT PIPING WORK

10.3.1. Piping Materials
It is recommended that you use copper and copper alloy jointless pipes with a maximum oil adherence of 40 mg/10m. Do not used
pipes that are crushed, deformed, or discolored (especially the inside surface). If these inferior pipes are used, impurities may clog
the expansion valves or capillaries.
Because the pressure of ACs using R410A is higher than those using R22, it is essential that you select materials that are
appropriate for these standards.
The thickness of the copper tubing used for R410A is shown in Table 10. Please be aware that tubing with a thickness of only 0.7
mm is also available on the market, but this should never be used.
Table 8 Difference between R410A and conventional charging hoses
Soft pipe Thickness (mm)
Nominal diameter Outside diameter (mm) R410A (Reference) R22
1/4 6.35 0.80 0.80
3/8 9.52 0.80 0.80
1/2 12.7 0.80 0.80

10.3.2. Processing and Connecting Piping Materials

When working with refrigerant piping, the following points must
be carefully observed: no moisture od dust must be allowed to
enter the piping, and there must be no refrigerant leaks.
1. Procedure and precautions for flaring work
a. Cut the pipe
Use a pipe cutter, and cut slowly so the pipe will not be
deformed.
b. Remove burrs and clean shavings from the cut surface
If the shape of the pipe end is poor after removing burrs,
or if shavings adhere to the flared area, it may lead to
refrigerant leaks.
To prevent this, turn the cut surface downward and
remove burrs, then clean the surface, carefully.
Fig. 10 Flaring dimensions
c. Insert the flare nut (be sure to used the same nut that is
used on the AC unit)
d. Flaring
Check the clamp bar and the cleanliness of the copper
pipe.
Be sure to sued the clamp bar to do the flaring with
accuracy. Use either an R410A flaring tool, or a
conventional flaring tool. flaring tools come in different
sizes, so be sure to check the size before using. When
using a conventional flaring tool, use the copper pipe
gauge for clearance adjustment, etc., to ensure the
correct A dimension (see Fig. 10)

Fig. 11 Relation between the flare nut structure and flaring tool end

54
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Table 11 R410A flaring dimensions

Nominal Outside Wall thickness A (mm)
diameter diameter (mm) R410A flaring Conventional flaring tool
(mm) tool, clutch type Clutch type Wing-nut type
1/4 6.35 0.8 0 - 0.5 1.0 - 1.5 1.5 - 2.0
3/8 9.52 0.8 0 - 0.5 1.0 - 1.5 1.5 - 2.0
1/2 12.70 0.8 0 - 0.5 1.0 - 1.5 2.0 - 2.5

Table 12 R410A flaring dimensions

Nominal Outside Wall thickness A (mm)
diameter diameter (mm) R410A flaring Conventional flaring tool
(mm) tool, clutch type Clutch type Wing-nut type
1/4 6.35 0.8 0 - 0.5 0.5 - 1.0 1.0 - 1.5
3/8 9.52 0.8 0 - 0.5 0.5 - 1.0 1.0 - 1.5
1/2 12.70 0.8 0 - 0.5 0.5 - 1.0 1.5 - 2.0

Table 13 R410A flaring and flare nut dimensions Unit: mm

Nominal Outside Wall thickness A +0, -0.4 B C D Flare nut
diameter diameter (mm) (mm) dimension dimension dimension width
1/4 6.35 0.8 9.1 9.2 6.5 13 17
3/8 9.52 0.8 13.2 13.5 9.7 20 22
1/2 12.70 0.8 16.6 16.0 12.9 23 26

Table 14 R410A flaring and flare nut dimensions Unit: mm

Nominal Outside Wall thickness A +0, -0.4 B C D Flare nut
diameter diameter (mm) (mm) dimension dimension dimension width
1/4 6.35 0.8 9.0 9.2 6.5 13 17
3/8 9.52 0.8 13.0 13.5 9.7 20 22
1/2 12.70 0.8 16.2 16.0 12.9 20 24

2. Procedure and precautions for flare connection

a. Check to make sure there are no scratches, dust, etc., on the flare and union.
b. Align the flared surface with the axial center of the union.
c. Use a torque wrench, and tighten to the specified torque. The tightening torque for R410A is the same as the conventional
torque value for R22. Be careful, because if the torque is too weak, it may lead to a gas leak. If it is too strong, it may split
the flare nut or make it impossible to remove the flare nut.
Table 15 R410A tightening torque
Nominal Outside Tightening torque Torque wrench tightening torque
diameter diameter (mm) N.m (kgf.cm) N.m (kgf.cm)
1/4 6.35 14 - 18 (140 - 180) 18 (180)
3/8 9.52 33 - 42 (330 -420) 42 (420)
1/2 12.70 55 (550) 55 (550)

10.3.3. Storing and Managing Piping Materials

1. Types of piping and their storage
The following is a general classification of the refrigerant pipe materials used for ACs.

Because the gas pressure of R410A is approximately 1.6 times as high as that of R22, copper pipes with the thickness shown
in Table 10, and with minimal impurities must be used. Care must also be taken during storage to ensure that pipes are not
crushed, deformed, or scratched, and that no dust, moisture or other substance enters the pipe interior. When storing sheathed
copper pipes or plain copper pipes, seal the openings by pinching or taping them securely.
2. Makings and management
a. Sheathed copper pipes and copper-element pipes
When using these pipes, check to make sure that they are the stipulated thickness. For flare nuts, be sure to used the same
nut that is used on the AC unit.

55
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

b. Copper pipes
Use only copper pipes with the thickness given in table 10, and with minimal impurities. Because the surface of the pipe is
exposed, you should take special care, and also take measures such as marking the pipes to make sure they are easily
distinguished from other piping materials, to prevent mistaken use.
3. Precautions during refrigerant piping work
Take the following precautions on-site when connecting pipes. (Keep in mind that the need to control the entry of moisture and
dust is even more important that in conventional piping).
a. Keep the open ends of all pipes sealed until connection with AC equipment is complete.
b. Take special care when doing piping work on rainy days. The entering of moisture will degrade the refrigerating machine oil,
and lead to malfunctions in the equipment.
c. Complete all pipe connections in as short a time as possible. If the pipe must be left standing for a long time after removing
the seal, it must be thoroughly purged with nitrogen, or dried with a vacuum pump.

10.4. INSTALLATION, TRANSFERRING, SERVICING

10.4.1. Inspecting Gas Leaks with a Vacuum Pump for New Installations (Using New
Refrigerant Piping)
1. From the viewpoint of protecting the global environment, please do not release refrigerant into the atmosphere.
a. Connect the projecting side (pin-pushing side) of the charging hose for the manifold gauge to the service port of the 3-way
valve. (1)
b. Fully open the handle Lo of the manifold gauge and run the vacuum pump. (2) (If the needle of the low-pressure gauge
instantly reaches vacuum, re-check step a).)
c. Continue the vacuum process for at least 15 minutes, then check to make sure the low-pressure gauge has reached -0.1
MPa (-76 cmHg). Once the vacuum process has finished, fully close the handle Lo of the manifold gauge and stop the
vacuum pump operation, then remove the charging hose that is connected to the vacuum pump adaptor. (Leave the unit in
that condition for 1-2 minutes, and make sure that the needle of the manifold gauge does not return.) (2) and (3)
d. Turn the valve stem of the 2-way valve 90 counter-clockwise to open it, then, after 10 seconds, close it and inspect for a gas
leak (4)
e. Remove the charging hose from the 3-way valve service port, then open both the 2-way valve and 3-way valve. (1) (4) (Turn
the valve stem in the counter-clockwise direction until it gently makes contact. Do not turn it forcefully).
f. Tighten the service port cap with a torque wrench (18 N.m (1.8 kgf.m)). (5) Then tighten the 2-way valve and 3-way valve
caps with a torque wrench (42 N.m (4.2 kgf.m)) or (55 N.m (5.5 kgf.m)).
g. After attaching each of the caps, inspect for a gas leak around the cap area. (5) (6)

Precautions
· Be sure to read the instructions for the vacuum pump,
vacuum pump adaptor and manifold gauge prior to use,
and follow the instructions carefully.
· Make sure that the vacuum pump is filled with oil up to
the designated line on the oil gauge.
· The gas pressure back flow prevention valve on the
charging hose is generally open during use. When you
are removing the charging hose from the service port, it
will come off more easily if you close this valve.

Fig. 12 Vacuum pump air purging configuration

56
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

10.4.2. Transferring (Using New Refrigerant Piping)

1. Removing the unit
a. Collecting the refrigerant into the outdoor unit by pumping down
The refrigerant can be collected into the outdoor unit (pumping down) by pressing the TEST RUN button, even when the
temperature of the room is low.
· Check to make sure that the valve stems of the 2-way valve and 3-way valve have been opened by turning them counter-
clockwise. (Remove the valve stem caps and check to see that the valve stems are fully opened position. Always use
a hex wrench (with 4-mm opposing sides) to operate the valve stems.)
· Press the TEST RUN button on the indoor unit, and allow preliminary for 5-6 minutes. (TEST RUN mode)
· After stopping the operation, let the unit sit for about 3 minutes, then close the 2-way valve by turning the valve stem in
the clockwise direction.
· Press the TEST RUN button on the indoor unit again, and after 2-3 minutes of operation, turn the valve stem of the 3-
way valve quickly in the clockwise direction to close it, then stop the operation.
· Tighten the caps of the 2-way valve and 3-way valve to the stipulated torque.
· Remove the connection pipes (liquid side and gas side).
2. Installing the unit
Install the unit using new refrigerant piping. Follow the instructions in section 4.1 to evacuate the pipes connecting the indoor
and outdoor units, and the pipes of the indoor unit, and check for gas leaks.

10.4.3. AC Units Replacement (Using Existing Refrigerant Piping)

When replacing and R410A AC unit with another R410A AC unit, you should re-flare the refrigerant piping. Even though the
replacement AC unit uses the R410A, problems occur when, for example, either the AC unit maker or the refrigerating machine oil
is different.
When replacing an R22 AC unit with an R410A AC unit, the following checks and cleaning procedures are necessary but are
difficult to do because of the chemical characteristics of the refrigerating machine oil (as described in items c) and d) of section
10.1.1.(2)). In this case, you should use new refrigerant piping rather than the existing piping.
1. Piping check
Because of the different pressure characteristics of R22 and R410A, the design pressure for the equipment is 1.6 times
different. the wall thickness of the piping must comply with that shown in Table 10, but this is not easy to check. Also, even if
the thickness is correct, there may be flattened or bent portions midway through the piping due to sharp curves. Buried sections
of the piping also cannot be checked.
2. Pipe cleaning
A large quantity of refrigerating machine oil (mineral oil) adheres to existing pipes due to the refrigeration cycle circulation. If the
pipes are used just as they are for the R410A cycle, the capacity will be lowered due to the incompatibility of this oil with the
R410A, or irregularities may occur in the refrigeration cycle. For this reason, the piping must be thoroughly cleaned, but this is
difficult with the present technology.

10.4.4. Refrigerant Compatibility (Using R410A Refrigerant in R22 ACs and Vice Versa)
Do not operate an existing R22 AC with the new R410A refrigerant. Doing so would result in improper functioning of the equipment
or malfunction, and might lead to a major accident such as an explosion in the refrigeration cycle. Similarly, do not operate an
R410A AC with R22 refrigerant. The chemical reaction between the refrigerating machine oil used in R410A ACs and the chlorine
that is contained in R22 would cause the refrigerating machine oil to degrade and lead to malfunction.

10.4.5. Recharging Refrigerant During Servicing

When recharging is necessary, insert the specified amount of new refrigerant in accordance with the following procedure.
1. Connect the charging hose to the service port of the outdoor unit.
2. Connect the charging hose to the vacuum pump adaptor. At this time, fully open the 2-way valve and 3-way valve.
3. Fully open the handle Lo of the manifold gauge, turn on the power of the vacuum pump and continue the vacuum process for
at least one hour.
4. Confirm that the low pressure gauge shows a reading of -0.1 Mpa (-76 cmHg), then fully close the handle Lo, and turn off the
vacuum pump. Wait for 1-2 minutes, then check to make sure that the needle of the Low pressure gauge has not returned. See
Fig. 13 for the remaining steps of this procedure.

57
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5. Set the refrigerant cylinder onto the electronic scale, then correct the hose the cylinder and to the connection port for the
electronic scale. (1)(2)
Precaution:
Be sure to set up the cylinder for liquid charging. If you use a cylinder equipped with a siphon tube, you can charge the liquid
without having to turn the cylinder around
6. Remove the charging hose of the manifold gauge from the vacuum pump adaptor, and connect it to the connection port of the
electronic scale. (2)(3)
7. Open the valve of the refrigerant cylinder, then open the charging valve slightly and close it. Next, press the check valve of the
manifold gauge and purge the air. (2)(4) (Watch the liquid refrigerant closely at this point.)
8. After adjusting the electronic scale to zero, open the charging valve, then open the valve Lo of the manifold gauge and charge
with the liquid refrigerant. (2)(5) (Be sure to read the operating instructions for the electronic scale.)
9. If you cannot charge the stipulated amount, operate the unit in the cooling mode while charging a little of the liquid at a time
(about 150 g/time as a guideline). If the charging amount is insufficient from one operation, wait about one minute, then use the
same procedure to do the liquid charging again.
Precaution:
Never use the gas side to allow a larger amount of liquid refrigerant to be charged while operating the unit.
10. Close the charging valve, and after charging the liquid refrigerant inside the charging hose, fully close the valve Lo of the
manifold gauge, and stop the operation of the unit. (2)(5)
11. Quickly remove the charging hose from the service port. (6) If you stop midway through, the refrigerant that is in the cycle will
be discharged.
12. After putting on the caps for the service port and operating valve, inspect around the caps for a gas leak. (6)(7)

Fig. 13 Re-charging refrigerant

58
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

10.4.6. Brazing
As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person.
In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting
dry nitrogen gas (N2) flow.
<Brazing Method for Preventing Oxidation>
1. Attach a reducing valve to the nitrogen gas cylinder.
2. Attach a reducing valve to the nitrogen gas cylinder.
3. Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to prevent the nitrogen gas
from flowing backward.
4. When the nitrogen gas is flowing, be sure to keep the piping end open.
5. Adjust the flow rate of nitrogen gas so that it is lower than 0.05 m3/h, or 0.02 MPa (0.2 kgf/cm2) by means of the reducing valve.
6. After taking the steps above, keep the nitrogen gas flowing until the piping cools down to a certain extent (i.e. temperature at
which pipes are touchable with finger).
7. Completely remove the flux after brazing.

Cautions during brazing

1. General Cautions
a. The brazing strength should be high as required.
b. After operation, airtightness should be kept under pressurized condition.
c. During brazing do not allow component materials to become damaged due to overheating.
d. The refrigerant pipe work should not become blocked with scale or flux.
e. The brazed part should not restrict the flow in the refrigerant circuit.
f. No corrosion should occur from the brazed part.
2. Preventing of Overheating
Due to heating, the interior and exterior surfaces of treated metal may oxidize. Especially, when the interior of the refrigerant
circuit oxidizes due to overheating, scale occurs and stays in the circuit as dust, thus exerting a fatally adverse effect. So,
make brazing at adequate brazing temperature and with minimum of heating area.
3. Overheating Protection
In order to prevent components near the brazed part from overheating damaged or quality deterioration due to flame or heat,
take adequate steps for protection such as (1) by shielding with a metal plate, (2) by using a wet cloth, and (3) by means
of heat absorbent.
4. Movement during Brazing
Eliminate all vibration during brazing to protect brazed joints from cracking and breakage.
5. Oxidation Preventative
In order to improve the brazing efficiency, various types of antioxidant are available on the market. However, the
constituents of these are widely varied, and some are anticipated to corrode the piping materials, or adversely affect HFC
refrigerant, lubricating oil, etc. Exercise care when using an oxidation preventive.

10.4.7. Servicing Tips

The drier must also be replaced whenever replacing the refrigerant cycle parts. Replacing the refrigerant cycle parts first
before replacing the drier. The drier is supplied in a vacuum pack. Perform brazing immediately after opening the vacuum
pack, and then start the vacuum within two hours. In addition, the drier also needs to be replaced when the refrigerant has
leaked completely.

59
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

11 Installation Information
11.1. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)
11.1.1. Check Points

11.1.2. The Shapes of the 3-way Valve

Caps of the Outdoor Unit have
been Changed.
· Accompanying the changes in the shapes of the 3-way
valve caps, the tightening method has also been changed.
· Firmly tighten the 3-way valve caps by hand, and then
tighten them up by another 30 degrees or so (one-twelfth of
a full turn) using a spanner or adjustable spanner.

60
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

11.2. OUTDOOR UNIT (CU-3E23CBPG)

11.2.1. Check Points

61
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

11.3. OUTDOOR UNIT (CU-4E27CBPG)

11.3.1. Check Points

11.3.2. The Pipe Diameter for the 4.0 kW or Above Models has been Reduced.
· 1/4” and 3/8” pipes are used for models with a rated cooling capacity of up to 5.0 kW.
· Applicable connecting tube kit: CZ-3F type.

62
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

11.4. PIPING LENGTH

(In case of CU-2E15CBPG)

63
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

12 Installation Instruction
12.1. INDOOR UNIT

Required tools for Installation Works

1. Philips screw driver 7. Reamer 14. Torque wrench
2. Level gauge 8. Knife 18 N•m (1.8 kgf.m)
3. Electric drill, hole core drill 9. Gas leak detector 42 N•m (4.2 kgf.m)
(ø70 mm) 10. Measuring tape 55 N•m (5.5 kgf.m)
4. Hexagonal wrench (4 mm) 11. Thermometer 15. Vacuum pump
5. Spanner 12. Megameter 16. Gauge manifold
6. Pipe cutter 13. Multimeter

SAFETY PRECAUTIONS
• Read the following “SAFETY PRECAUTIONS” carefully before installation.
• Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model to be installed.
• The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as
below.Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications.

WARNING This indication shows the possibility of causing death or serious injury.

CAUTION This indication shows the possibility of causing injury or damage to properties only.

The items to be followed are classified by the symbols:

Symbol with background white denotes item that is PROHIBITED from doing.

• Carry out test running to confirm that no abnormality occurs after the installation. Then, explain to user the operation, care and
maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.

WARNING
1) Engage dealer or specialist for installation. If installation done by the user is defective, it will cause water leakage, electrical shock or fire.
2) Install according to this installation instruction strictly. If installation is defective, it will cause water leakage, electrical shock or fire.
3) Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock.
4) Install at a strong and firm location which is able to withstand the set's weight. If the strength is not enough or installation is not properly done, the set
will drop and cause injury.
5) For electrical work, follow the local national wiring standard, regulation and this installation instruction. An independent circuit and single outlet must be
used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.
6) Use the specified cable (1.5 mm2) and connect tightly for indoor/outdoor connection. Connect tightly and clamp the cable so that no external force will
be acted on the terminal. If connection or fixing is not perfect, it will cause heat-up or fire at the connection.
7) Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause heat-up at
connection point of terminal, fire or electrical shock.
8) When carrying out piping connection, take care not to let air substances other than the specified refrigerant go into refrigeration
cycle.
Otherwise, it will cause lower capacity, abnormal high pressure in the refrigeration cycle, explosion and injury.
9) When connecting the piping, do not allow air or any substances other than the specified refrigerant (R410A) to enter the refrigeration
cycle. Otherwise, this may lower the capacity, cause abnormally high pressure in the refrigeration cycle, and possibly result in
explosion and injury.
10) • When connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may cause abnormally high
pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only R410A materials.
• Thickness of copper pipes used with R410A must be more than 0.8 mm. Never use copper pipes thinner than 0.8 mm.
• It is desirable that the amount of residual oil is less than 40 mg/10 m.

11) Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with other electrical
appliances. Otherwise, it will cause fire or electrical shock.

CAUTION
1) This equipment must be earthed. It may cause electrical shock if grounding is not perfect.

2) Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding
of the unit, it may cause fire.

3) Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture.

ATTENTION
1) Selection of the installation location.
Select a installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.
2) Power supply connection to the room air conditioner.
Connect the power supply cord of the room air conditioner to the mains using one of the following method.
Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency.
In some countries, permanent connection of this room air conditioner to the power supply is prohibited.
1) Power supply connection to the receptacle using a power plug.
Use an approved 15A/16A power plug with earth pin for the connection to the socket.
2) Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A circuit breaker for the permanent connection. It
must be a double pole switch with a minimum 3 mm contact gap.
3) Do not release refrigerant.
Do not release refrigerant during piping work for installation, reinstallation and during repairing a refrigeration parts. Take care of the liquid refrigerant,
it may cause frostbite.
4) Installation work.
It may need two people to carry out the installation work.
5) Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

64
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Attached accessories.
No. Accessories part Qty. No. Accessories part Qty.
Installation plate Air purifying filter

1 1 5 1

Installation plate fixing screw Solar refreshing deodorizing

filter
2 6 6 1

Remote control Remote control

holder
3 1 7 1

Battery Remote control holder fixing

screw
4 2 8 2

Applicable piping kit CZ-3F5, 7AEN

Indoor Unit Installation Diagram

Piping direction Attention not to

(Front side) bend up drain hose
Right

Right Rear
Right Left
Left
Bottom
Rear Left Bottom

1 SELECT THE BEST LOCATION

There should not be any heat source or steam near the unit.
There should not be any obstacles blocking the air circulation.
A place where air circulation in the room is good.
A place where drainage can be easily done.
A place where noise prevention is taken into consideration.
Do not install the unit near the door way.
Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.
Recommended installation height for indoor unit shall be at least 2.3 m.

Installation parts you should

purchase ( )
or more
5 cm

Installation plate

Sleeve ( )
Bushing Sleeve ( )
Putty (Gum type sealer) ( )
5 cm
or more

Bend the pipe as closely on

the wall as possible, but be
careful that it doesn’t break.
Air purifying filter
or
Solar refreshing
deodorizing filter
(Left and right are identical)
Vinyl tape (Wide) ( )
Insulation of piping connections • Apply after carrying out a
• Carry out insulation drainage test.
after checking for gas • To carry out the drainage
leaks and secure with test, remove the air filters
vinyl tape. and pour water into the heat
exchanger.

( ) Vinyl tape

Attaching the remote control holder to the wall

Remote control holder

fixing screws
Remote control Remote
holder MODE

AIR SWING
SLEEP
control
FAN SPEED
1 2 3
ON SET

OFF CANCEL

+
CHECK RESET CLOCK BATTERY

65
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

2 HOW TO FIX INSTALLATION PLATE

The mounting wall is strong and solid enough to prevent it from the vibration.
Wall Wall
More than 440 mm More than 425 mm

Screw ˇ

Installation
plate
210 mm
Measuring 120 mm 200 mm
tape
150 mm

The center of installation plate should be at more than 425 mm at right of the wall.
The centre of installation plate should be at more than 440 mm at left of the wall.
The distance from installation plate edge to ceiling should more than 67 mm.
From installation plate left edge to unit’s left side is 37 mm.
From installation plate right edge to unit’s right is 59 mm.
: For left side piping, piping connection for liquid should be about 95 mm from this line.
: For left side piping, piping connection for gas should be about 155 mm from this line.
: For left side piping, piping connecting cable should be about 800 mm from this line.
1. Mount the installation plate on the wall with 5 screws or more.
(If mounting the unit on the concrete wall consider using anchor bolts.)
• Always mount the installation plate horizontally by aligning the marking-off line with the
thread and using a level gauge.
2. Drill the piping plate hole with ø70 mm hole-core drill.
• Line according to the arrows marked on the lower left and right side of the installation
plate. The meeting point of the extended line is the centre of the hole.Another method
is by putting measuring tape at position as shown in the diagram above. The hole
centre is obtained by measuring the distance namely 150 mm and 120 mm for left and
right hole respectively.
• Drill the piping hole at either the right or the left and the hole should be slightly slanted
to the outdoor side.

3 TO DRILL A HOLE IN THE WALL AND

INSTALL A SLEEVE OF PIPING
1. Insert the piping sleeve to the hole.
2. Fix the bushing to the sleeve. Wall
3. Cut the sleeve until it extrudes about Indoor Outdoor
15 mm from the wall.
15 mm

CAUTION
Sleeve for
When the wall is hollow, please be tube ass'y
sure to use the sleeve for tube ass'y Approx. 5 - 7 mm
to prevent dangers caused by mice
biting the connecting cable.
Bushing for tube
ø70 through hole ass'y
4. Finish by sealing the sleeve with putty Putty or caulking compound
or caulking compound at the final
stage.

66
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

4 INDOOR UNIT INSTALLATION

1. FOR THE RIGHT REAR PIPING

Pull out the piping and drain hose Install the Indoor Unit

Pull out the Indoor piping Hook the indoor unit onto the upper portion of installation
Move the drain : Centre of the piping hole
(left rear side of piping) plate(Engage the indoor unit with the upper edge of the installation
hose near to arrow mark
and tape it with piping in a plate). Ensure the hooks are properly seated on the installation
position as mentioned in plate by moving in left and right.
Install the Indoor Unit Fig below Piping

Drain hose
Hooks at
Secure the Indoor Unit installation
plate
Cover for Cover for the Sleeve for
the right piping left piping piping hole
Piping
Insert the connecting cable Cover for the bottom
piping
Indoor unit Drain hose
Cover for the bottom piping
2. FOR THE RIGHT AND RIGHT
BOTTOM PIPING

Pull out the Indoor piping

How to keep the cover Secure the Indoor Unit

Cover for piping
In case of the cover is cut, keep the cover 1. Tape the extra power supply cord in a
Install the Indoor Unit
at the rear of chassis as shown in the bundle and keep it behind the chassis.
illustration for future reinstallation. 1. • Ensure that the power supply
cord is not clamped in
Insert the connecting cable between the unit's hook (2
positions) and installation
(Left, right and 2 bottom covers for piping)
plate.
2. Press the lower left and right
Secure the Indoor Unit Installation
side of the unit against the Unit’s hook plate
installation plate until hooks
engages with their slots
3. FOR THE EMBEDDED PIPING
Insert the connecting cable (sound click).

Replace the drain hose

Connecting cable
Gas side piping
Ab 9 c
8

ou m
–

Liquid side piping

Bend the embedded piping
Guide surface To take out the unit, push the
• Use a spring bender or Connecting cable Drain hose
PUSH marking at the bottom unit ,
equivalent to bend the piping so
Length of Gas side piping
that the piping is not crushed. and pull it slightly towards you to
connecting cable Liquid side piping
78 cm disengage the hooks from the unit. PUSH marking

Install the Indoor Unit Cable

(This can be used for left rear piping & left bottom piping also.)
Cut and flare the embedded piping
• When determining the
dimensions of the piping, slide Exchange the drain hose and the cap
the unit all the way to the left on Rear view for left piping installation
the installation plate.
• Refer to the section “Cutting and Sleeve for
flaring the piping”. piping hole
Connecting cable
Pull the connecting cable into Indoor Unit
Drain
• The inside and outside Drain hose hose
connecting cable can be Drain hose Connecting cable
Drain cap
connected without removing the Piping
front grille. Adjust the piping slightly downwards. More than approx. 95 cm
Connect the piping
• Please refer to “Connecting the
piping” column in outdoor unit
section. (Below steps are done
after connecting the outdoor
• How to pull the piping and drain hose out, in case of the embedded piping. • In case of left piping how to insert the
piping and gas-leakage
connecting cable and drain hose.
confirmation.)
Apply putty or caulking material to seal the wall opening
Insulate and finish the piping PVC tube for drain hose
• Please refer to “Piping and n Cable
tha
finishing” column of outdoor re Piping
Mo 00 cm
45

1 Connecting cable
section and “Insulation of piping
More than 70 cm

connections” column as Piping

mentioned in Indoor/ Outdoor
Unit Installation. More cm Drain hose
32 Drain hose from main unit Indoor
than
Secure the Indoor Unit PVC tube (VP-65) for piping Unit Piping
and connecting cable
PVC tube for Cable
PVC tube for drain hose (VP-30)
drain hose (VP-20) 6 cm (For the right piping, follow the same procedure)

67
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

5 CONNECT THE CABLE TO THE

INDOOR UNIT
1. The inside and outside connecting cable can be connected without removing the
front grille.
2. Connecting cable between indoor unit and outdoor unit shall be approved
2
polychloroprene sheathed 4 x 1.5 mm flexible cord, type designation 245 IEC
57(H05RN-F) or heavier cord.

• Ensure the color of wires of outdoor unit and the terminal Nos. are the same to
the indoor’s respectively. 1 2 3
• Earth lead wire shall be longer than the other lead wires as shown in the figure for
the electrical safety in case of the slipping out of the cord from the anchorage.

Terminals on the indoor unit 1 2 3

Color of wires
Terminals on the outdoor unit 1 2 3

• Secure the cable onto the control board with the holder (clamper).

68
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

INSTALLATION OF AIR PURIFYING FILTERS CHECK THE DRAINAGE

1. Open the front panel. • Open front panel and remove air filters.
2. Remove the air filters. (Drainage checking can be carried out without
3. Put air purifying filter (left) and solar refreshing removing the front grille.)
Drain tray-
deodorizing filter (right) into place as shown in • Pour a glass of water into the drain tray-styrofoam. styrofoam
illustration at right. • Ensure that water flows out from drain hose of the
Air filter indoor unit.
Air purifying filter
or
HOW TO TAKE OUT FRONT GRILLE Solar refreshing
deodrizing filter EVALUATION OF THE PERFORMANCE
Please follow the steps below to take out front grille if necessary such as when servicing.
1. Set the vertical airflow direction louver to the horizontal position. • Operate the unit at cooling operation mode for
2. Slide down the two caps on the front grille as shown in the illustration fifteen minutes or more.
at right, and then remove the two mounting screws. • Measure the temperature of the intake and
Vertical airflow
3. Pull the lower section of the front grille towards you to remove the deflection louver discharge air.
front grille. • Ensure the difference between the intake
Discharge air
temperature and the discharge is more than 8 C.

When reinstalling the front grille, first Screw

set the vertical airflow direction louver CHECK ITEMS
to the horizontal position and then (Move the vertical
carry out above steps 2 - 3 in the vane to horizontal) Is there any gas leakage at flare nut Is the indoor unit properly hooked
reverse order. connections? to the installation plate?
Has the heat insulation been carried out Is the power supply voltage
Cap
at flare nut connection? complied with rated value?
AUTO SWITCH OPERATION Is the connecting cable being fixed to Is there any abnormal sound?
terminal board firmly?
The below operations will be performed by pressing the “AUTO” switch. Is the cooling operation normal?
1. AUTO OPERATION MODE Is the connecting cable being clamped
Is the thermostat operation
firmly?
1. The Auto operation will be activated normal?
immediately once the Auto Switch is pressed. Is the drainage ok?
Is the remote control’s LCD
2. TEST RUN OPERATION (FOR PUMP (Refer to “Check the drainage” section)
operation normal?
DOWN/SERVICING PURPOSE) Is the earth wire connection properly
Is the air purifying filter installed?
The Test Run operation will be activated if done?
the Auto Switch is pressed continuously for
more than 5 sec. to below 8 sec.. ENGLISH
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
1. A “pep” sound will occur at the fifth sec., in
order to identify the starting of Test Run
Web Site : http://www.panasonic.co.jp/global/ F612315
operation. PRINTED IN JAPAN

Changing the remote control transmission code

• When installing two air conditioners in one room, each air conditioner can be
synchronized to the remote control.
In order to operate separately, open the rear cover of one of the remote control and set
to “B”.

Jumper wire
Remote controller
Set “B” on the remote control. Side view of jumper
This can be achieved by cutting Give two cuts.
the jumper wire of the remote
control with a cutter. The disconnected jumper
OPEN
wire is “B” setting.

Setting the air conditioner unit to “B”

1. Press the “AUTO” switch for about 11 to 15 seconds. When you hear three short beeps
“pep, pep, pep”, release the switch.
1. Note: you will hear one beep “pep” in about 5 seconds, and then two beeps “pep, pep” in
about 8 seconds.
2. Press again the “AUTO” switch within 60 seconds. Every press the “AUTO” switch, you
will hear a short beep “pep”. When you hear eventually a long beep “peep”, stop
pressing the “AUTO” switch , which achieves “B” setting.
1. If you stop pressing the “AUTO” switch midway at the short beep “pep”, this will achieve
“A” setting.
3. After 60 seconds or longer of the above setting, use the “B” set remote control to confirm
successful operation.

69
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

12.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

Attached accessories. Indoor/Outdoor Unit Installation Diagram

No. Accessories part Qty. No. Accessories part Qty.
Installation plate Piping direction Attention not to
Solar refreshing (Front side) bend up drain hose
deodorizing filter Right
1 1 6 1
Right Rear
Remote control Right Bottom Left Left
Installation plate fixing
holder Rear Left Bottom
screw
2 6 7 1
Installation parts you
Remote control Remote control holder fixing should purchase ( )
3 1 8
screw 2

or more
5 cm
Battery Drain elbow
Installation plate 1
4 2 Sleeve ( )
9 1 Bushing Sleeve ( )
Air purifying filter
5 1 Putty (Gum type sealer) ( )
5 cm
or more

Applicable piping kit Bend the pipe as closely

CZ-3F5, 7AEN on the wall as possible,
Air purifying filter 5
or but be careful that it
SELECT THE BEST LOCATION Solar refreshing doesn’t break.
(Left and right are identical) deodorizing filter 6
Insulation of piping connections
INDOOR UNIT • Carry out insulation
after checking for gas
Vinyl tape (Wide) ( )
There should not be any heat source or steam near
leaks and secure with • Apply after carrying out a
the unit. vinyl tape. drainage test.
There should not be any obstacles blocking the air • To carry out the
circulation. ( ) Vinyl tape drainage test, remove
A place where air circulation in the room is good. the air filters and pour
A place where drainage can be easily done. Attaching the remote control holder to the wall water into the heat
A place where noise prevention is taken into exchanger.
Remote control holder
consideration. fixing screwsıı 8
Do not install the unit near the door way. Remote
Remote control
control 3
Ensure the spaces indicated by arrows from the wall, holder 7
ceiling, fence or other obstacles.
Recommended installation height for indoor unit shall
be at least 2.3 m.
50Hz
Power supply cable:
OUTDOOR UNIT 230V ~
3 X 1.5mm2 or more.
15A
Breaker Type designation 245 ICE
If an awning is built over the unit to prevent direct 57(H05RN-F) Saddle ( )
sunlight or rain, be careful that heat radiation from the
condenser is not obstructed.
cm re
There should not be any animal or plant which could be 10 mo
or Connecting cable
affected by hot air discharged. 4 x 1.5 mm2or more.
Keep the spaces indicated by arrows from wall,ceiling, Type designation 245 IEC 57
fence or other obstacles. (H05RN-F)
Do not place any obstacles which may cause a short Additional drain hose ( )
10 cm
circuit of the discharged air. or more
If piping length is over the common length, additional
refrigerant should be added as shown in the table. 1/4" Liquid side piping ( )
cm
100more
or
Common Min. Max. total Max. Additional 3/8" Gas side piping ( )
PIPE size
gas charge 3
Length Length Length Elevation or 0 c
mom
amount re
Gas Liquid (m) (m) (m) (m) (g/m)
3/8" 1/4" 15 3m/Indoor 30 10 20
unit
Note: (1)It is possible to extend the piping length of one unit up to 20 meters.
However, the total piping length must not exceed 30 meters.
(2)If the piping length exceeds 20 meters, refrigerant of 20g per meter
• This illustration is for explanation purposes only.
must be added. The indoor unit will actually face a different way.

70
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

1 SELECT THE BEST LOCATION

(Refer to “Select the best location” section)

2 INSTALL THE OUTDOOR UNIT

• After selecting the best location, start 570 105
installation according to Indoor/Outdoor

18.5
Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame firmly
and horizontally by bolt nut (ø10 mm).

320
2. When installing at roof, please consider
strong wind and earthquake. Please fasten
the installation stand firmly with bolt or
nails.

3 CONNECTING THE PIPING

Connecting The Piping To Indoor Unit

Please make flare after inserting flare nut (locate at joint

portion of tube assembly) onto the copper pipe.
(In case of using long piping) Spanner
or wrench Torque
Connect the piping wrench

• Align the center of piping and sufficiently tighten

the flare nut with fingers. Piping size (Torque)
• Further tighten the flare nut with torque wrench in
Gas Liquid
specified torque as stated in the table.
3/8" [42 N•m] 1/4" [18 N•m]
Connecting The Piping To Outdoor Unit

Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make
flare after inserting the flare nut (locate at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specified torque
as stated in the table.

CUTTING AND FLARING THE PIPING

1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the copper pipes.
Improper flaring
Pipe
Handle Bar 0 - 0.5 mm
Reamer
Bar Yoke
Core Inclined Surface Cracked Uneven
damaged thickness

Point down When properly flared, the internal surface

Clamp handle Red arrow mark Copper pipe
of the flare will evenly shine and be of
even thickness. Since the flare part
1. To cut 2. To remove burrs 3. To flare comes into contact with the connections,
carefully check the flare finish.

71
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

4 EVACUATION OF THE EQUIPMENT (FOR EUROPE & OCEANIA DESTINATION)

WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR
INSIDETHE INDOOR UNIT AND PIPES in the following procedure.

1. Connect a charging hose with a push pin to the Low and High side of a charging set and the
Indoor unit Liquid side
THREE-WAY VALVE Outdoor unit service port of the 3-way valves.
• Be sure to connect the end of the charging hose with the push pin to the service port.
2. Connect the centre hose of the charging set to a vacuum pump with check valve, or vacuum pump
Gas side and vacuum pump adaptor.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves
THREE-WAY VALVE
from 0 cmHg(0 MPa)to – 76 cmHg(–0. 1MPa). Then evacuate the air for approximately 15
minutes.
4. Close the Low and High side valves of the charging set and turn off the vacuum pump.Make sure
that the needle in the gauge does not move after approximately 5 minutes.
Indoor unit Liquid side Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS
THREE-WAY VALVE
LEAKAGE.
CLOSED
5. Disconnect the charging hose from the vacuum pump and from the servise port of the 3-way

Gas side
valves.
6. Tighten the service port caps of the 3-way valves at a torque of 18 N·m with a torque wrench.
THREE-WAY VALVE 7. Remove the valve caps of the both 3-way valves.
OPEN
CLOSED Position both of the valves to OPEN using a hexagonal wrench(4mm).
Vacuum
pump Lo Hi 8. Mount valve caps onto the both 3-way valves.
CLOSE • Be sure to check for gas leakages.

Vacuum pump adaptor

CAUTION
• If gauge needle does not move from 0 cmHg (0 MPa) to –76 cmHg (–0.1 MPa), in step 3 above take the following measure:
• If the leak stops when the piping connections are tightened further, continue working from step 3 .
• If the leak does not stop when the connections are retightened, repair the location of leak.
• Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite.

5 CONNECT THE CABLE TO THE

OUTDOOR UNIT
6 PIPE INSULATION
1. Remove the control board cover from the unit by loosening the screw.
2. Connecting cable between indoor unit and outdoor unit shall be Control board Control board cover 1. Please carry out insulation at pipe connection portion as
approved polychloroprene sheathed 4 x 1.5 mm2 flexible cord, type Control board mentioned in Indoor/Outdoor Unit Installation Diagram.
designation 245 IEC 57(H05RN-F) or heavier cord. Please wrap the insulated piping end to prevent water
from going inside the piping.
Terminals on the indoor unit 1 2 3
2. If drain hose or connecting piping is in the room (where
Color of wires dew may form), please increase the insulation by using
15A
Terminals on the outdoor unit 1 2 3 Breaker
POLY-E FOAM with thickness 6 mm or above.
Power supply cord Power Indoor Indoor
3. Secure the cable onto the control board with the holder (clamper). supply unit A unit B
4. Attach the control board cover in its original position with the screw. cord

DISPOSAL OF OUTDOOR UNIT DRAIN WATER

CHECK ITEMS
• If a drain elbow is used, the unit should be placed
on a stand which is taller than 3 cm. Is there any gas leakage at flare nut Is the indoor unit properly hooked
• If the unit is used in an area where temperature connections? to the installation plate?
falls below 0 C for 2 or 3 days in succession, it is Has the heat insulation been carried out Is the power supply voltage
recommended not to use a drain elbow, for the at flare nut connection? complied with rated value?
drain water freezes and the fan will not rotate. Drain elbow 9 Hose
Install the hose at an angle so that the Is the connecting cable being fixed to Is there any abnormal sound?
water smoothly flows out. terminal board firmly?
CHECK THE DRAINAGE Is the cooling operation normal?
Is the connecting cable being clamped
Is the thermostat operation
• Open front panel and remove air filters. firmly?
normal?
(Drainage checking can be carried out without Is the drainage ok?
removing the front grille.) Is the remote control’s LCD
Drain tray- (Refer to “Check the drainage” section)
• Pour a glass of water into the drain tray-styrofoam. operation normal?
styrofoam Is the earth wire connection properly
• Ensure that water flows out from drain hose of the Is the air purifying filter installed?
done?
indoor unit.

EVALUATION OF THE PERFORMANCE

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ENGLISH
• Operate the unit at cooling operation mode for
fifteen minutes or more. Web Site : http://www.panasonic.co.jp/global/ F612314
• Measure the temperature of the intake and PRINTED IN JAPAN
discharge air.
• Ensure the difference between the intake
temperature and the discharge is more than 8 C.
Discharge air

72
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

12.3. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG)

Accessories
Accessories supplied with the outdoor unit: CU-3E23CBPG

(A) Drain plug (B) Screw bag

(For fixing electrical wire
anchor bands)
1 1
There is on the bottom
packing case. There is on the bottom packing case.

(C) Installation Manual 4 (D) Operation Manual 1

Accessories supplied with the outdoor unit: CU-4E27CBPG

(A) Drain socket (B) Drain cap (C) Drain receiver

1 2 3

(D) Screw bag

(For fixing electrical wire
anchor bands)
1 (E) Installation Manual 4 (F) Operation Manual 1

Precautions for Selecting the Location

Outdoor Unit
1) Choose a place solid enough to bear the weight and vibration of the unit, where the operation noise will not be amplified.
2) Choose a location where the hot air discharged from the unit or the operation noise, will not cause a nuisance to the
neighbors of the user.
3) Avoid places near a bedroom and the like, so that the operation noise will cause no trouble.
4) There must be sufficient spaces for carrying the unit into and out of the site.
5) There must be sufficient space for air passage and no obstructions around the air inlet and the air outlet.
6) The site must be free from the possibility of flammable gas leakage in a nearby place. Locate the unit so that the noise
and the discharged hot air will not annoy the neighbors.
7) Install units, power cords and inter-unit cables at least 3 meter away from television and radio sets. This is to prevent
interference to images and sounds. (Noises may be heard even if they are more than 3 meter away depending on radio
wave conditions.)
8) In coastal areas or other places with salty atmosphere of sulfate gas, corrosion may shorten the life of the air
conditioner.
9) Since drain flows out of the outdoor unit, do not place under the unit anything which must be kept away from moisture.

Note
Cannot be installed hanging from ceiling or stacked.

73
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Outdoor Unit Installation Drawings

For installation of the indoor units, refer to the installation manual which was provided with the units.
(The diagram shows a wall-mounted indoor unit.)
CAUTION
Do not connect the embedded branch piping and the outdoor unit when only carrying out piping work without connecting
the indoor unit in order to add another indoor unit later.
Make sure no dirt or moisture gets into either side of the embedded branch piping.
See “6 Refrigerant Piping Work” for details.
It is impossible to connect the indoor unit for one room only. Be sure to connect at least 2 rooms.

CU-3E23CBPG Allow 30 cm of work

space below the
In sites with poor drainage, ceiling surface.
use block bases for
outdoor unit.
Adjust foot height until 25 cm from
wall
the unit is leveled.
Otherwise, water leakage or Allow space for piping and
pooling of water may occur. electrical servicing.

cm hole
Where there is a danger of the 33 lt-
58cm bo
unit falling, use foot bolts, o ot es
(Foot
bolt-hole F ntr
or wires. c e
centre
s)

CU-4E27CBPG Allow 30 cm of work space

below the ceiling surface. Allow space for piping and
electrical servicing.

25 cm from
wall

In sites with poor drainage,

use block bases for
outdoor unit. le
cm ho
Adjust foot height until lt-
35 bo
the unit is leveled. 62cm ot es
(Foot Fo ntr
Otherwise, water leakage or bo lt-hole ce
centre
pooling of water may occur. s) Also insulate the connection on the outdoor unit.
Clamping material
Insulation tube
Tape Service lid
Where there is a danger of the unit falling,
use foot bolts, or wires.
Use tape or insulating material on all connections
to prevent air from getting in between the copper
piping and the insulation tube.
Be sure to do this if the outdoor unit is installed
above.

Installation

Install the unit horizontally.

The unit may be installed directly on a concrete verandah or a solid place if drainage is good.
If the vibration may possibly be transmitted to the building, use a vibration-proof rubber (field supply).

Connections (connection port)

Install the indoor unit according to the table below, which shows the relationship between the class of indoor unit and the
corresponding port.
The total indoor unit class that can be connected to this unit:

CU-3E23CBPG 5.0kW - 10.0kW

CU-4E27CBPG 5.0kW - 13.6kW

Indoor Unit
CS-ME7CKPG : 2.2kW
CS-ME10CKPG : 2.8kW
CS-ME12CKPG : 3.2kW
CS-ME14CKPG : 4.0kW
CS-ME18CKPG : 5.0kW

74
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Outdoor Unit Installation Guidelines

Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation guidelines below.
For any of the below installation patterns, the wall height on the exhaust side should be 1200 mm or less.

Wall facing one side Walls facing two sides

More than 100 More than 350

More than 350
More
1200 than 100
or less

More than 50 More than 50

Top view
Side view

Walls facing three sides

More than 100

More than 50 More than 350

Top view
Unit: mm

Selecting a location for installation of the indoor units

The maximum allowable length of refrigerant piping, and the maximum allowable height difference between the outdoor and
indoor units, are listed below.
(The shorter the refrigerant piping, the better the performance. Connect so that the piping is as short as possible. Shortest
allowable length per room is 3 m.)

Outdoor unit CU-4E27CBPG CU-3E23CBPG

Piping to each indoor unit 25 m max. 25 m max.
Total length of piping between all units 70 m max. 50 m max.

Indoor Unit
Level
Outdoor Unit difference:
15m max.
Level Level
difference: difference:
15m max. 7.5m max. Outdoor Unit
Level
difference:
7.5m max. Indoor Unit

If the outdoor unit is positioned higher than the If the outdoor unit is positioned otherwise.
indoor units. (If lower than one or more indoor units)

75
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

3P097711-1 (M02B043)
Outdoor Unit

1 Installing Outdoor Unit

When installing the outdoor unit, refer to “Precautions for Selecting the Location” and the “Indoor/outdoor
Unit Installation Drawings.”
If drain work is necessary, follow the procedures below.

2 Drain Work Drain-water hole

(CU-3E23CBPG) Bottom frame

Use drain plug for drainage. While
Drain plug
If the drain port is covered by a mounting base or floor surface, place pressing
additional foot bases of at least 30 mm in height under the outdoor Hose (available
unit’s feet. commercially, inner
In cold areas, do not use a drain hose with the outdoor unit. dia. 16mm)
(Otherwise, drain water may freeze, impairing heating performance.)
(A) Drain socket (B) Drain cap
(CU-4E27CBPG)
1. Insert drain receiver (C) onto drain socket (A) and drain cap (B)
beyond 4 projections around drain socket and drain cap.
2. Insert drain socket and drain caps into their matching drain hole ;
Drain socket (A) into drain hole I and drain caps (B) into drain hole II
and III. After insertion, turn them about 40 clockwise.

(Be sure not to insert them into wrong drain holes, or (C) Drain receiver
there causes water leakage.)
II
I
(View from bottom)
III

3. Connect vinyl hose on the market (intemal diameter of 25 mm) to drain socket (A)
(If the house is too long and hangs down, fix it carefully to prevent the kinks.)

Note
If the drain holes of the outdoor unit are covered with the mounting bracket or the floor, raise the unit to provide
the space of more than 100mm under the leg of the outdoor unit.

3 Refrigerant Piping
1. Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with
the torque wrenches.
Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas.

Flare nut tightening torque Valve cap tightening Service port cap
torque tightening torque
14.2-17.2N·m
Flare nut for 6.4
(144-175kgf·cm) Liquid pipe
26.5-32.3N·m 10.8-14.7N·m
32.7-39.9N·m (110-150kgf·cm)
Flare nut for 9.5 (270-330kgf·cm)
(333-407kgf·cm)

2. To prevent gas leakage, apply refrigeration machine oil on both inner and outer surfaces of the flare.
(Use refrigeration oil for R-410A)

4 Purging Air and Checking Gas Leakage

When piping work is completed, it is necessary to purge the air and check for gas leakage.

5 Charging with Refrigerant

If the total length of piping for all rooms exceeds the figure listed below, additionally charge with 20 g of
refrigerant (R-410A) for each additional meter of piping.

Outdoor capacity class CU-4E27CBPG CU-3E23CBPG

Total length of piping for all rooms 40m 30m

CAUTION
Even though the shut-off valve is fully closed, the refrigerant may slowly leak out; do not leave the flare nut
removed for a long period of time.

6 Refrigerant Piping Work

Cautions on Pipe Handling Be sure to place Wall
Protect the open end of the pipe against dust and moisture. a cap.
All pipe bends should be as gentle as possible. Use a pipe Rain If no flare cap is
bender for bending. available, cover the
(Bending radius should be 30 to 40 mm or larger.) flare mouth with
Selection of Copper and Heat Insulation materials tape to keep dirt
or water out.
When using commercial copper pipes and fittings, observe the following:
Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052kW/mK (0.035 to 0.045 kcal/mh C)
Refrigerant gas pipe’s surface temperature reaches 110 C max.
Choose heat insulation materials that will withstand this temperature.
Be sure to insulate both the gas and liquid piping and to provide insulation
dimensions as below.
Inter-unit wiring
Gas pipe Liquid pipe
Pipe size Pipe insulation

O.D : 6.4mm / Thickness : 0.8mm I.D : 8-10mm / Thickness : 10mm min.

O.D : 9.5mm, 12.7mm / Thickness : 0.8mm I.D : 12-15mm / Thickness : 13mm min.
O.D : 15.9mm / Thickness : 1.0mm I.D : 16-20mm / Thickness : 13mm min.
Gas pipe Liquid pipe
insulation insulation
Use separate thermal insulation pipes for gas and liquid refrigerant pipes. Drain hose
Finishing tape

76
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

7 Flaring the Pipe End

1. Cut the pipe end with a pipe cutter. (Cut exactly at right angles.) Remove burrs
2. Remove burrs with the cut surface facing Flaring
downward so that the chips do not enter Set exactly at the position shown below.
the pipe.
3. Put the flare nut on the pipe. A Flare tool for R-410A Conventional flare tool
4. Flare the pipe. Wing-nut type
Die Clutch-type Clutch-type
5. Check that the flaring is properly made. (Rigid-type) (Imperial-type)
A 0 ~ 0.5 mm 1.0 ~ 1.5 mm 1.5 ~ 2.0 mm

WARNING
Check
Do not use mineral oil on flared part. The pipe end
Flare’s inner
Prevent mineral oil from getting into the system as this would reduce the lifetime surface must must be evenly
of the units. be flaw-free. flared in a
Never use piping which has been used for previous installation. Only use parts perfect circle.
which are delivered with the unit.
Do never install a drier to this R-410A unit in order to guarantee its lifetime. Make sure
The drying material may dissolve and damage the system. that the flare
Incomplete flaring may cause refrigerant gas leakage. nut is fitted.

Purging Air and Checking Gas Leakage

WARNING WARNING
Do not mix any substance other than the specified If refrigerant gas leaked during air purging, ventilate
refrigerant (R-410A) into the refrigeration cycle. the room as soon as possible.

To prevent air pollution, a vacuum pump should be used for air purging wherever possible.

WARNING
Use a vacuum pump for R-410A exclusively. Using the same vacuum pump for different refrigerants may damage
the vacuum pump or the unit.

If using additional refrigerant, perform air purging from the refrigerant pipes and indoor unit using a vacuum pump,
then charge additional refrigerant.
Use a hexagonal wrench (4 mm) to operate the shut-off valve rod.
All refrigerant pipe joints should be tightened with a torque wrench at the specified tightening torque.

(1) Connect projection side (on which worm pin is pressed) of charging hose (which comes from gauge
manifold) to gas shut-off valve’s service port.

(2) Fully open gauge manifold’s low-pressure valve (Lo) and completely close its high-pressure valve (Hi).
(High-pressure valve subsequently requires no operation.)

(3) Apply vacuum pumping. Check that the compound pressure gauge reads – 0.1 MPa (– 76 cm Hg).
Evacuation for at least 1 hour is recommended.

(4) Close gauge manifold’s low-pressure valve (Lo) and stop vacuum pump.
(Leave as is for 4-5 minutes and make sure the coupling meter needle does not go back.
If it does go back, this may indicate the presence of moisture or leaking from connecting parts. Repeat steps
2 – 4 after checking all connecting parts and slightly loosening the nuts.)

(5) Remove covers from liquid shut-off value and gas shut-off valve.

(6) Turn the liquid shut-off valve’s rod 90 degrees counterclockwise with a hexagonal wrench to open valve.
Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from indoor unit’s flare and outdoor unit’s flare and valve rods.
After the check is complete, wipe all soapy water off.

(7) Disconnect charging hose from gas shut-off valve’s service port, then fully open liquid and gas shut-off
valves.
(Do not attempt to turn valve rod beyond its stop.)

(8) Tighten valve lids and service port caps for the liquid and gas shut-off valves with a torque wrench at the
specified torques. See “3 Refrigerant Piping” for details.

77
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Wiring

WARNING
Do not use tapped wires, stand wires, extensioncords, or starbust connections, as they may cause overheating,
electrical shock, or fire.

Do not turn ON the safety breaker until all work Outdoor unit
Room Room Room
is completed. A B C
(1) Strip the insulation from the wire (20 mm).
(2) Connect the connection wires between the
indoor and outdoor units so that the
Be sure to use the correct circuits.
terminal numbers match. Tighten the terminal
screws securely. We recommend Safety breaker Ground fault
Indoor unit 50Hz 220-240V
a flathead screwdriver be used to tighten 20A interrupter
the screws. The screws are packed with Room A
the terminal board. To room C
245 IEC57 (H05RN-F)
Power supply cord : 3×2.5mm2 or more To room B Shape the wires so that there
Connecting cord between indoor and outdoor : 4×1.5mm2 is no lifting of the service Use the specified wires and
hatch or other structural parts. connect them securely.
(3) Pull the wire and make sure that it does not disconnect.
Then fix the wire in place with a wire stop. Secure the branch wiring firmly using the 4 included
screws, as shown in the figure.
Secure firmly, making sure no outside pressure is
exerted on the terminals.

For CU-3E23CBPG, follow the procedure below to connect the wires. For CU-4E27CBPG, follow the procedure below to connect the wires.
(When connecting 3 or more rooms)

(A) (B) (A) (B)

Cover Cover

(C) (D) (C) (D)

(E) (E)

(1) Remove the service lid, and it should be as in Figure (A). (1) Remove the service lid, and it should be as in Figure (A).
First push up the cover as shown in Figure (B), then connect room C (Figure (C)). First push up the cover as shown in Figure (B), then connect room C,D (Figure (C)).
Be sure to connect from room C. Be sure to connect from room C,D.
(2) After room C is connected, replace the cover (Figure (D)). (2) After room C and D are connected, replace the cover (Figure (D)).
(3) Connect room A, B and power supply wires (Figure (E)). (3) Connect room A, B and power supply wires (Figure (E)).
(4) When connecting the power supply wires to rooms A and B, route the wires so that no force (4) When connecting the power supply wires to rooms A and B, route the wires so that no force
will be applied to the lid, which may otherwise be deformed. (Figure (E)) will be applied to the lid, which may otherwise be deformed. (Figure (E))

Earth
This air conditioner must be earthed.
For earthing, follow the applicable local standard for electrical installations.

78
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Test Run and Final Check

Before starting the test run, measure the voltage at the primary side of the safety To test cooling, set for the lowest temperature. To test heating, set for the highest temperature.
breaker. Check that it is 230V. (Depending on the room temperature, only heating or cooling (but not both) may be possible.)
Check that all liquid and gas shut-off valves are fully open. After the unit is stopped, it will not start again (heating or cooling) for approximately 3 minutes.
Check that piping and wiring all match. The wiring error check can be conveniently used During the test run, first check the operation of each unit individually. Then also check the
for underground wiring and other wiring that cannot be directly checked. simultaneous operation of all indoor units.
Check both heating and cooling operation.
Wiring error check Service P-board After running the unit for approximately 20 minutes, measure the temperatures at the indoor
This product is capable of automatic correction of wiring error. unit inlet and outlet. If the measurements are above the values shown in the table below, then
they are normal.
Press the “wiring error check switch” on the outdoor unit
service monitor print board. However, the wiring error check
Cooling Heating
switch will not function for one minute after the safety breaker
is turned on, or depending on the outside air conditions (See Temperature difference
Approx. 8 C Approx. 20 C
Note 2.). between inlet and outlet
Approximately 10 – 15 minutes after the switch is pressed, the Wiring error (When running in one room)
errors in the connection wiring will be corrected. check switch
(SW3) During cooling operation, frost may form on the gas shut-off valve or other parts. This
The service monitor LEDs indicate whether or not correction
is possible, as shown in the table below. For details about is normal.
how to read the LED display, refer to the service guide. Operate the indoor units in accordance with the included operation manual. Check that they
operate normally.
If self-correction is not possible, check the indoor unit wiring
Items to check
and piping in the usual manner.
Check item Consequences of trouble Check
LED 1 2 3 4 Message
Are the indoor units installed securely? Falling, vibration, noise
All Flashing Automatic correction impossible
Has an inspection been made to check for gas No cooling, no heating
Status Flashing One after another Automatic correction completed leakage?

(One or more of LEDs 1 to 4 are ON) Abnormal stop [Note. 4] Has complete thermal insulation been done Water leakage
(gas pipes, liquid pipes, indoor portions of the
drain hose extension)?
Wiring correct example
Is the drainage secure? Water leakage
Terminal block Are the ground wire connections secure? Danger in the event of a ground fault
Are the electric wires connected correctly? No cooling, no heating
Is the wiring in accordance with the Operation failure, burning
specifications?
* The figure at left shows
branch wiring. Are the inlets/outlets of the indoor and outdoor No cooling, no heating
units free of any obstructions?
From Room B From Room A From Room C From Room D Are the shut-off valves open?
to the “living room” to the “bedroom” to the “kitchen” to the “children’s room” Do the marks match (room A, room B) on the No cooling, no heating
wiring and piping for each indoor unit?
Wiring error check
Is the priority room setting set for 2 or more The priority room setting will not
LED lighting sequence after a wiring correction. rooms? function.

Order of LED flashing: 2 1 3 4

ATTENTION
Notes
Have the customer actually operate the unit while looking at the manual included with the
(1) For two rooms, LED 3 and 4 are not displayed, and for three rooms, LED 4 is not indoor unit. Instruct the customer how to operate the unit correctly (particularly cleaning of
displayed. the air filters, operation procedures, and temperature adjustment).
(2) If the outside air temperature is 5 C or less , the wiring error check function will not Even when the air conditioner is not operating, it consumes some electric power. If the
operate. customer is not going to use the unit soon after it is installed, turn OFF the breaker to avoid
(3) After wiring error check operation is completed, LED indication will continue until wasting electricity.
ordinary operation starts. If additional refrigerant has been charged because of long piping, list the amount added on
This is normal. the nameplate on the reverse side of the shut-off valve cover.
(4) Follow the product diagnosis procedures. (Check the nameplate on the underside of
the shut-off valve.)

Pump Down Operation

In order to protect the environment, be sure to pump down

Forced operation
when relocating or disposing of the unit. (1) Turn the Operation Mode switch (SW2) to “COOL.”
(2) Press the Forced Operation switch (SW1) to begin forced cooling. Press the Forced Operation switch (SW1) again
to stop forced cooling.
(1) Remove the valve lid from liquid shut-off valve and gas shut-off
valve. Service P-board
(2) Carry out forced cooling operation.
(3) After five to ten minutes, close the liquid shut-off valve with a
hexagonal wrench.
(4) After two to three minutes, close the gas shut-off valve and
stop forced cooling operation.

Gas shut-off valve Close

Hexagonal
wrench Operation
Mode switch
(SW2) Forced Operation
switch (SW1)
Liquid shut-off Valve lid
valve

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ENGLISH

Web Site : http://www.panasonic.co.jp/global/ PRINTED IN JAPAN

79
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13 Servicing Information
13.1. TROUBLESHOOTING
13.1.1. Rated Frequency Operation
During troubleshooting and servicing, rated compressor operating frequency must be obtained in order to check the specification
and technical data. Below are the methods used to obtain rated compressor operating frequency.
1. Cooling
· Press the AUTO button for 5-8 seconds on the indoor unit. The air conditioner starts operation at Cooling rated frequency.

2. Heating
Keep pressing the AUTO button for 8-11 seconds. The air conditioner starts operation at Heating rated frequency.

13.1.2. Troubleshooting Air Conditioner

Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the power source, malfunction of a compressor or a fan.
The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions; the standard values
for them are shown in the following table.
Gas pressure MPa (kg/cm 2G) Outlet air temperature (°C)
Cooling Mode 0.9 - 1.1 (9 - 11) 15 - 17
Heating Mode 2.1 - 2.8 (21 - 28) 35 - 41

* In case of CU-2E15CBPG/2E18CBPG

Condition:
· Indoor fan speed; High
· Outdoor temperature is 35 °C at cooling mode and 7 °C at heating mode.
· Compressor operates at rated frequency.

80
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

81
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.2. SELF DIAGNOSIS DISPLAY

13.2.1. Indoor Unit
[Table of diagnosis methods]
Symbol Diagnosis Diagnosis method
H11 Indoor/Outdoor This trouble display appears when indoor/outdoor unit communication fails to be established after 30 or more
abnormal seconds.
communication <Diagnosis checkpoint>
1. Measure the voltages of the indoor/outdoor unit communication cables, and check whether the voltage is
being supplied properly to the outdoor unit or whether it is being returned from the outdoor unit to the
indoor units.
H12 Indoor unit capacity This trouble display appears when wrong in the total connection capacity and wrong connection in each
unmatched capacity.
The trouble is determined within 2 minutes after the power is turned on.
<Diagnosis checkpoint>
1. Check the total capacity of the units connected and check that the models are compatible for connection.
H14 Intake air temp. This trouble display appears when the intake air temperature has exceeded above 46 °C continuously for 2
sensor minutes or dropped below -54 °C continuously for 5 seconds during operation.
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 6.5 kΩ) is not
found, defective contact of the connector is to blame.
H16 Outdoor Current CU-2E:
Transformer When a value of under 1.5A has been detected for the total current during operation beyond the set capacity,
the compressor operates with its operating frequency controlled to a maximum of 38 Hz for 3 minutes, and if
it continues to operate at a total current of under 1.5A for another 3 minutes, its operation stops.
CU-3E/4E:
When the total current has dropped below the set current level continuously for 20 seconds during operation
beyond the set capacity, operation is stopped. Three minutes later, operation is started up again, and when the
trouble occurs on 4 successive occasions, the trouble display appears (the timer lamp blinks).
<Diagnosis checkpoint>
1. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is extremely low).
2. Check the control P.C. Board: Check for a broken wire (open circuit) in the current transformer. (If an open
circuit is found, replace the control P.C. Board.)
In the case of a scroll compressor (DC motor), H16 is detected only when the regular compressor is
operating.
H19 Indoor fan motor · High-voltage PWM: When a state in which the fan motor speed is not synchronized with the control signal
mechanism lock has been detected on 7 successive occasions:
· Low-voltage PAM: When the fan lock detection signal has been detected on 7 successive occasions or it
has been detected continuously for 25 seconds or when a state in which the fan motor speed is not
synchronized with the control signal has been detected on 7 successive occasions:
The trouble display appears (the timer lamp blinks).
<Diagnosis checkpoint>
1. Check the nature of the fan lockup trouble.
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in
the control P.C. Board.
H23 Indoor heat This trouble display appears when a temperature of under approximately -40 °C or above approximately 80 °C
exchanger temp. has been detected by the heat exchanger temperature sensor continuously for 5 seconds.
sensor (This trouble is not detected during de-icing.)
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 2.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H27 Outdoor air temp. This trouble display appears when a temperature of under approximately -40 °C or above approximately 150
sensor °C has been detected by the outside air temperature sensor for 2 to 5 seconds. (This trouble is not detected
during de-icing.)
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H28 Outdoor heat This trouble display appears when a temperature of under approximately -60 °C or above approximately 110
exchanger temp. °C has been detected by the heat exchanger temperature sensor for 2 to 5 seconds. (This trouble is not
sensor 1 detected during de-icing.)
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.

82
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Symbol Diagnosis Diagnosis method

H30 Outdoor discharge CU-2E:
pipe temp. sensor This trouble display appears when a temperature of under approximately -16 °C or above approximately 200
°C has been detected by the outlet temperature sensor for 2 to 5 seconds.
CU-3E/4E:
Disconnected discharge sensor
· When the condensation temperature is higher than the discharge temperature + (plus) 6 °C, a sensor
disconnection is detected, operation stops, and the trouble display appears (the timer lamp blinks).
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H32 Outdoor heat This trouble display appears when a temperature of under approximately -60 °C or over approximately 110 °C
exchanger temp. has been detected continuously for 2 to 5 seconds by the outlet temperature sensor of the heat exchanger.
sensor 2 <Diagnosis checkpoint>
(discharge pipe 1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
temp.) has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H34 Outdoor heat sink This trouble display appears when a temperature of under -43 °C or above 80 °C has been detected by the
temp. sensor outdoor unit radiator fin sensor continuously for 2 seconds.
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H36 Abnormal gas pipe This trouble display appears when a temperature of under approximately -45 °C or above approximately 149
temp. sensor °C has been detected by the outdoor unit gas side pipe temperature sensor continuously for 2 to 5 seconds.
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H37 Outdoor liquid pipe This trouble display appears when a temperature of under -45 °C or above 149 °C has been detected by the
temp. sensor outdoor unit liquid side pipe temperature sensor continuously for 2 seconds.
<Diagnosis checkpoint>
1. This trouble display appears when a temperature which is impossibly high or low from a normal standpoint
has been detected.
Check the sensor, and if open-circuiting (more than 500 kΩ) or short-circuiting (less than 0.5 kΩ) is not
found, defective contact of the connector or a defective control P.C. Board is to blame.
H39 Abnormal indoor This display appears in rooms other than one in which indoor freezing trouble has occurred when the pipes
operating unit or have been connected incorrectly, when an outdoor expansion valve is defective or when an expansion valve
standby units connector has become disconnected.
H41 Abnormal wiring or CU-2E only
piping connection This display appears when this kind of trouble is detected 3 minutes after a forced cooling operation was
conducted for one room during the initial operation after the power was turned on. It appears when:
· The indoor unit pipe temperature in a room without the capacity supply available at an outside air
temperature above 5 °C has dropped by more than 20 °C to 5 °C or lower 3 minutes after the compressor
started up.
· The outdoor unit gas pipe temperature in a room without the capacity supply available has dropped by
more than 5 °C to 5 °C or lower 3 minutes after the compressor started up.
H97 Outdoor fan motor CU-2E:
mechanism lock When trouble, which is defined as a state in which the fan motor speed is not synchronized with the control
signal has been detected on 5 successive occasions, has occurred for the third time in a 60-minute period and
twice during a 30-minute period, the trouble display appears, and operation stops.
CU-3E/4E:
When the fan motor speed detected when its maximum output is demanded is below 30 rpm continuously for
15 seconds, the fan motor stops for 3 minutes and then restarted.
When this happens on 16 occasions (the trouble display is cleared when the value is normal for 5 minutes),
the H97 diagnostic symbol is stored in the memory, and the fan motor stops.
<Diagnosis checkpoint>
1. Check the nature of the fan lockup trouble.
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in
the control P.C. Board.
H98 Indoor high pressure The restriction on the compressor frequency is started when the temperature of the indoor unit heat exchanger
protection source is between 50 °C and 52 °C, the compressor stops at a temperature from 62 °C to 65 °C, it is restarted
3 minutes later at below 62 °C to 65 °C, and the restriction on the compressor frequency is released at a
temperature between 48 °C and 50 °C. (No trouble display appears.)
<Diagnosis checkpoint>
1. Check the indoor unit heat exchanger temperature sensor (check for changes in its characteristics and
check its resistance): Symptoms include no hot start when operation is started, a failure of the thermostat
to turn on (no outdoor unit operation). And frequent repetition of stopping and startup.
2. Check also for short circuits indoors and clogging of the air filters.

83
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Symbol Diagnosis Diagnosis method

H99 Indoor operating unit The restriction on the compressor frequency is started when the indoor unit heat exchanger temperature is
freezing between 8 °C and 12 °C. Operation stops if a temperature below 0 °C continues for 6 minutes. Three minutes
later, operation is started up at a temperature from 3 °C to 8 °C. The restriction on the compressor frequency
is released at a temperature between 13 °C and 14 °C.
<Diagnosis checkpoint>
1. A cooling or dry mode operation conducted at a low outside air temperature is mainly to blame:
this is not indicative of any malfunctioning.
If the outside air temperature rises during automatic operation in the winter months, the dry mode
operation is selected. The H99 diagnostic display also appears at such a time.
2. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is low) or a pipe may be
broken, etc.
3. Check also for short circuits indoors and clogging of the air filters.
F11 4-way valve switching CU-2E:
failure When the indoor unit heat exchanger temperature is under -5 °C during a warming operation or above 45 °C
during a cooling or dry mode operation four minutes after the compressor has started up, the F11 diagnostic
symbol is stored in the memory, and operation stops. 3 minutes later, operation is restarted.This trouble
display appears when this happens on 4 occasions in a 30-minute period.
CU-3E/4E:
When a difference of 0 °C to 5 °C has been detected between the outdoor unit heat exchanger temperature
and liquid side pipe temperature on 5 occasions, the trouble display appears.
<Diagnosis checkpoint>
1. Check the 4-way valve coil: Check that no power is supplied to the coil during cooling and dry mode
operations, and that power is supplied during heating operations. Inspect the coil for broken wires (open
circuits).
2. If the coil is trouble-free, the switching action of the 4-way valve may be defective.
F17 Indoor standby units CU-2E:
freezing After the operation of one indoor unit stops continuously for 5 minutes. The hole operation stops when the
stopping indoor unit pipe temperature is under -5 °C continuously for 1 minute or under 0 °C continuously for
5 minutes, and operation restarts after 3 minutes. This trouble display appears if that trouble happens on 3
occasions in a 30-minute period.
CU-3E/4E:
When the difference of an intake temperature (room temperature sensor) and the indoor unit heat exchanger
temperature (piping sensor) is higher than 10 °C or an indoor unit heat exchanger temperature of below -1 °C
has been detected continuously for 5 minutes, operation stops. Three minutes later, it is started up, and the
trouble display appears when this has occurred on 3 consecutive occasions.
<Diagnosis checkpoint>
1. Check the refrigerating cycle: Expansion valve leakage
2. Check the indoor unit pipe temperature sensor (check for changes in its characteristics and check its
resistance).
F90 PFC circuit protection CU-2E:
(CU-2E) When the rotation of the compressor is not synchronized with the control signal, the F90 diagnostic display is
stored in the memory, and operation stops. 3 minutes later, operation is restarted. This trouble display appears
when this happens on 4 occasions in a 10-minute period.
Main circuit low * With the multi 53 or above, it appears when this happens on 16 occasions.
voltage CU-3E/4E:
(CU-3E/4E) When a DC voltage below 305V to 328V has been detected on 16 occasions, this trouble display appears.
<Diagnosis checkpoint>
1. To check whether the 2-way or 3-way valve has been left open by mistake, operation is performed for one
to several minutes after the compressor has started up, F93 is stored in the memory as the symptom, and
operation stops.
2. Check the inverter circuit (for open circuits) in the control P.C. Board: Check the IPM base current (6
locations) within 3 minutes after the power has been turned back on. As the symptom, F93 is stored in the
memory 30 seconds after the compressor has started up, and operation stops. The trouble display
appears after 4 restarts.
3. Check for broken wires (open circuits) in the compressor winding: Approximately 1 ohm under normal
conditions for each phase (same symptom as in 2.)
4. Check the power supply voltage has been down or not.
F91 Refrigeration cycle CU-2E:
abnormality When the rotation speed of the compressor exceeds the setting frequency and the total current is 1.5A or
higher to 1.9A or lower continuously for 5 minutes, operation stops if the indoor unit heat exchanger
temperature is higher than 20 °C during cooling or dry operation or if it is under 25 °C during heating. Three
minutes later, it is restarted, and if the trouble occurs on 2 consecutive occasions in a 20-minute period, the
trouble display appears.
CU-3E/4E:
When the compressor frequency is above 55 Hz and the current drops below the prescribed level continuously
for 7 minutes, operation stops, and it is restarted 3 minutes later.
When the compressor discharge temperature has exceeded the setting and the expansion valve has remained
fully open for 80 seconds, operation stops, and it is restarted 3 minutes later.
When the stopping described above has occurred on 4 occasions, operation stops, and the trouble display
appears.
<Diagnosis checkpoint>
1. Check the refrigerating cycle: Gas may be leaking (more than one-half of the volume of the gas has gone).
The diagnostic displays resulting from a gas leak generally change in the following sequence depending
on the extent of the gas leak: H99 → F97 → F91 → H16.
The range of this trouble (F91) is limited. (Compressor protection at the start of the season)

84
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Symbol Diagnosis Diagnosis method

F93 Compressor CU-2E:
abnormal revolution When the rotation of the compressor is not synchronized with the control signal, the F93 diagnostic display is
stored in the memory, and operation stops. 3 minutes later, operation is restarted. This trouble display appears
when this happens on 4 occasions in a 20-minute period.
CU-3E/4E:
When a state in which the rotation of the compressor is not synchronized with the control signal has been
detected on 8 successive occasions, operation stops, and the trouble display appears.
<Diagnosis checkpoint>
1. To check whether the 2-way or 3-way valve has been left open by mistake, operation is performed for one
to several minutes after the compressor has started up, F93 is stored in the memory as the symptom, and
operation stops.
2. Check the inverter circuit (for open circuits) in the control P.C. Board: Check the IPM base current (6
locations) within 3 minutes after the power has been turned back on. As the symptom, F93 is stored in the
memory 30 seconds after the compressor has started up, and operation stops. The trouble display
appears after 4 restarts.
3. Check for broken wires (open circuits) in the compressor winding: Approximately 1 ohm under normal
conditions for each phase (same symptom as in 2.)
F95 Outdoor high CU-2E only
pressure protection When the temperature of the outdoor unit heat exchanger temperature sensor exceeds 62 °C, the F95
diagnostic symbol is stored in the memory, and operation stops. 13 minutes later, operation is restarted at a
temperature below 48 °C. This trouble display appears when this happens on 4 occasions in a 20-minute
period.
<Diagnosis checkpoint>
1. Check the outdoor unit heat exchanger temperature sensor (check for changes in its characteristics and
check its resistance).
2. Check whether something is interfering with the dissipation of the heat outdoors.
F96 Power transistor CU-2E:
module or Heating is detected inside the IPM which shuts itself off, the F96 diagnostic symbol is stored in the memory,
compressor and operation stops. 3 minutes later, operation is restarted. The trouble display appears when this happens on
overheating 4 occasions in a 30-minute period.
(CU-2E) CU-3E/4E:
When this trouble is detected from the electrical parts radiation fin temperature sensor and OLP output during
Compressor high operation, operation stops, and it is restarted 3 minutes later. If the trouble occurs on 4 occasions, operation
discharge stops, and the trouble display appears.
temperature <Diagnosis checkpoint>
(CU-3E/4E) 1. Something may be interfering with the dissipation of the heat outdoors or the outdoor unit fan may be
defective. (The outdoor unit fan is not running.)
2. Defective IPM (outdoor unit control P.C. Board)
3. Gas leaks. 2-way or 3-way valve is not opened.
F97 Compressor high When the temperature of the compressor temperature sensor exceeds 112 to 120 °C, the F97 diagnostic
discharge symbol is stored in the memory, and operation steps. Two minutes later, operation is restarted at a
temperature temperature below 107 to 110 °C.
CU-2E: The trouble display appears and operation stops when this happens on 3 occasions in a 30-minute
period.
CU-3E/4E: This trouble display appears and operation stops when this happens on 6 occasions (it is cleared
when the operation is normal for 20 minutes).
<Diagnosis checkpoint>
1. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is low). The stopping of the
outdoor unit from time to time is a symptom of this trouble.
2. When operation steps with this trouble display appearing, check the compressor temperature sensor
(check for changes in its characteristics and check its resistance).
3. Something may be interfering with the dissipation of the heat outdoors or the outdoor unit fan may be
defective. (The fan will not run because of an open circuit.)
(The protection function may be activated by an overload, and the F97 trouble display will remain stored
in the memory.)
F98 Total running current CU-2E:
protection When the total current exceeds the setting, the F98 diagnostic display is stored in the memory, and operation
stops. 3 minutes later, operation is restarted. The trouble display appears and operation stops when this
happens on 3 occasions in a 20-minute period.
CU-3E/4E:
When the total current exceeds the setting (17A to 20A), frequency control is started, and if it then exceeds the
setting, operation stops, and the trouble display appears.
<Diagnosis checkpoint>
1. Check the AC voltage at the outdoor unit terminal board during operation: The voltage drop must be within
5% of the voltage when operation has stopped (± 110% of rated voltage even during operation). If the
voltage drop exceeds 5% or if the voltage changes suddenly, inspect whether the power supply cord and
indoor/outdoor unit connection cables are too long or too small in diameter, etc.
2. heck whether something is interfering with the dissipation of the heat outdoors (during cooling operations):
Normally, the capacity is limited by the current so that the outdoor unit don’t stop, and the diagnostic
display does not appear.

85
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Symbol Diagnosis Diagnosis method

F99 DC peak detection CU-2E:
If the current level exceeds 22.5A after startup, the compressor stops, and it is restarted 3 minutes later. When
this occurs on 7 consecutive occasions, operation stops, and the trouble display appears.
CU-3E/4E:
When "Output current trouble", which occurs when the prescribed current level is exceeded, has occurred on
16 consecutive occasions, operation stops, and the trouble display appears.
<Diagnosis checkpoint>
1. Check whether the compressor is defective (locked up or shorted winding). Check the outdoor unit control
P.C. Board.

86
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.2.2. OUTDOOR UNIT (CU-3E23CBPG/4E27CBPG)

87
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.3. DISASSEMBLY OF PARTS

13.3.1. Indoor Unit

1. Remove the control box cover (steel plate).

2. Remove the display P.C. Board (plastic).

3. Disconnect the connectors, rearrange the lead wires, and remove the
discharge grille.

4. Remove the ground screw.

5. Disconnect the connectors of the fan motor, sensor, and others.

88
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

6. Remove the control board complete.

7. Remove the screw at the particular plate (heat exchanger clamp) on

the left of the unit.

8. Remove the screw that fix the heat exchanger to the base pan.

89
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

9. Remove the four screws that fix the fan motor cover (white), and
release the hooks.

10. Hold down the hook of the heat exchanger using a screwdriver or
other tool and remove the heat exchanger (while lifting 1, 2). Now
remove the fan motor cover.

90
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

11. Remove the screw that fix the fan, and then remove the fan motor.

12. Remove the cross-flow fan, and then remove the flucrum.

91
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.3.2. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

13.3.2.1. Removing the Cabinet Top Plate and Cabinet Front Plate

1. Remove the cabinet top plate (by removing the 4 screws).

2. Remove the 5 screws fixing the cabinet front plate, release the 6
hooks, and pull the cabinet front plate toward front side.

13.3.2.2. Removing the Control Board Cover

3. Remove the control board cover (remove 1 screw).

4. Remove the terminal cover (remove the 2 screws).

5. Remove the terminal cover (top), and disconnect all the lead wires (3
fasten tab) inside.

92
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.3.2.3. Removing the Control P.C. Board

6. Remove the control board cover.

7. Remove the 6 screws at the positions on the control P.C. Board

indicated by the arrows.

8. Disconnect the connectors and pipe sensor connected to the

compressor and reactor.

9. Remove the control P.C. Board.

* When pulling the control P.C. Board upward, it may not be

possible to remove it because of the way in which the ground
wire and other wires are routed. In this case, it is removed after
the control board cover itself has been removed.

13.3.2.4. Removing the Propeller Fan and Fan Motor

1. Follow the steps in 13.3.2.1. for removing the cabinet top plate and
cabinet front plate.

2. Remove the propeller fan by removing the nut turning clockwise at its
center.

3. Disconnect the connector of the fan motor from the control P.C.
Board.

4. Loosen the 4 fan motor mounting screws then remove the fan motor.

93
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.3.3. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG)

13.3.3.1. Removing the Cabinet Top Plate and Cabinet Front Plate
■ CU-3E23CBPG
1. Remove the cabinet top plate (remove the 4 screws).

2. Remove the 3 screws (1 on the right and 2 at the bottom) securing

the cabinet front plate, release the 2 hooks (1 each at the left and
right), and pull the cabinet front plate toward front side.

■ CU-4E27CBPG
1. Remove the cabinet top plate (remove the 12 screws).

2. Remove the 7 screws (2 on the each side and 3 at the bottom) fixing
the cabinet front plate, release the 4 hooks (2 each at the left and
right), and pull the cabinet front plate toward front side.

94
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.3.3.2. Remove the Control Board Cover (Right Side Plate for CU-4E27CBPG)
■ CU-3E23CBPG
3. Remove the control board cover (remove 2 screw).

■ CU-4E27CBPG
3. Remove the 5 screws and release the 2 hooks of the right side plate,
and remove the side plate.

95
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

13.3.3.3. Removing the Control P.C. Board

4. Remove the drip proof cover.

5. Disconnect the connectors (lead wires of the compressor, sensor,

and others).

6. Remove the screw at the right side of the control box, and pull out the
entire control box.

7. Release the control P.C. Board tab to remove the control P.C. Board.

13.3.3.4. Removing the Propeller Fan and Fan Motor

1. Follow the steps in 13.3.2.1. for removing the cabinet top plate and
cabinet front plate.

2. Remove the propeller fan by removing the nut turning clockwise at its
center.

3. Disconnect the fan motor connector from the control P.C. Board.

4. Loosen the 4 fan motor mounting screws then remove the fan motor.

96
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

14 Technical Data
14.1. OPERATION CHARACTERISTICS

97
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

98
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

99
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

100
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

101
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

102
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

15 Electronic Circuit Diagram

15.1. REMOTE CONTROL

Remote Control
Transmission Code Change
Setting J-A J-B Remarks
SEG10 SEG15
G COM0 SEG16 A ON ON At product delivery
COM1 SEG17
COM2 SEG18 B OFF ON
COM3 SEG19
SEG9 SEG20
C ON OFF
SEG8 SEG21
D OFF OFF
SEG7 Liquid SEG22
SEG6 Crystal SEG23
Display ON: Connected
SEG5 SEG24
SEG4 SEG25
OFF: Disconnected
SEG3 SEG26
SEG2 SEG27
SEG1 SEG28
F COM3 SEG29
COM2 SEG30
COM1 SEG31
COM0 SEG32 Remote Control Key

Key No. SW2 OFF SW2 ON

(Door is opened) (Door is closed)
1 OFF / ON OFF / ON
2 FAN SPEED TEMP
3 AIR SWING TEMP
E
4 ODOUR WASH
5
6 ON (Timer) QUIET
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 7 OFF (Timer) MODE
SEG22
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21

8 (Timer)
1 SEG6 SEG23 48
9 (Timer)
2 SEG5 SEG24 47
3 SEG4 SEG25 46
10 CANCEL (Timer) POWERFUL
4 SEG3 SEG26 45

D 5 SEG2 SEG27 44 11 SET (Timer) SLEEP TIMER

6 SEG1 SEG28 43
7 COM3 SEG29 42 12
8 COM2 IC1 SEG30 41
9 COM1 SBL3036M SEG31 40 13
10 COM0 SEG32 39
14
11 VLCD3 RMO 38
12 VLCD2 P40 37 15 CLOCK
13 VLCD1 P23 36
14 VDD P22 35 16 SET SET
R4 15 OSC1 P21 34
100K
16 OSC2 P20 33
RES
P30
P31
P32
P33
P00
P01
P02
P03
P10

P12
P13
VSS

P11

R5
XO
XI

100K
C 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
R6
100K

R7
47
X1
(3.52MHz)
EF0EC3524M4W C2 C1
4V 4V
100 100
BATTERY
0

R3
330K J-A J-B 13 14 15 16 R1
2.2
J2

J3

B
X2
(32.768kHz) D1
9 10 11 12 SID303
C002RX SW2

R2
1K
5 6 7 8 Q1
2SD1328STX

C5 RESET
0.1 terminal
1 2 3 4

1 2 3 4 5 6

103
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG
15.2. INDOOR UNIT

INDOOR 1/2
H

T1 ETXMJ251X1C
FUSE
250V 3.15A
LF1 DB1
D3SBA60 L1
12V ELECTRONIC
SS11V-04350
ELECTRONIC C43 c N3216ZP500T25 CONTROLER
CONTROLLER 250V TANSH11 R5 C4 15V D4
3300P (BLACK) 100K 250V UF4005
CWA742966 1/4W C1 4700P C2 C7 R20 C8
ZNR1 250V 250V b 25V
100K 0.01
TANSH16 ERZVEAV511 0.22 0.1 470
R6 C40 C5 C6
TANSH12 100K 250V 450V 25V R19
C42 (WHITE) 1/4W 4700P 68 120 6.8K 2 IC2
250V 1/4W
3300P L2 L3 SI-3050NA 5V
TH1 R15 a
100 N3216ZP500T25 N3216ZP500T25
ERF5TK7R5
TANSH14 C33 4 I O
G TANSH15 250V
1 4 C9 R21 C10 G C11 C12
2200P
D1
R9 Q3 5V 25V 560K 0.01 0.01
10V
3.9K PC1 DTA143XKA 470 100
ERA15-06V5 R7 R8 5
510K 510K D3 PS2501-1KE 5V
1/4W 1/4W 1SS355 2 3
TANSH13
EMC FILTER (RED)
ESD-R-16C R16
R1 R67 10K R18
6.8K 6.2K D2 PC2 5V 5.1K
GROUNDING 2W 2W ERA15-06V5 TLP421GR 1/4W
TERMINAL 1 2 3 TERMINAL 8 7 6 3
(BLACK) (WHITE) (RED) BOAD ASS'Y ZD1 4 1 R11 R14 C13 R17 C14
RD36EB1 10K 10K
680 0.1 0.022
EVAPORATER ZD2
RD36EB1 3 2 15V Q2
R12 R65 DTC143XKA 4 5 1 2
20K 5.6K R36
10K
To OUTDOOR UINT 1 4 R13
47K R37 5V
R10
F 1.21K 4.3K
2 3 Q1 PC4
2SC2412K 4 1 TLP521-1(GB) 5V
PC3 Q4
TLP421 (BL) 2SB1188 R38 Q6
3 2 1K DTC143XKA R30 C16 R28
1K 0.01 10K
R35
CN-FM 7.5K 5V

1
1 4 R31 R29 C17 5V
PC5 1K 10K 0.01
TLP521-1(GB) R43 SW1
FAN MOTOR 4 1K
FM 5
6
2 3 1/4W AUTO
SW
5V
7 5V R44 C25 R59
R39 Q5 20K 1000P 1K J2 J1
E ZD3 C24
50V
10K DTA143XKA 5V
RD6.8M-T1B R58
10 4 1
10K
R22 PC6
LED1M 1K TLP521-1(GB) R60
POWER SLR-342MC 5V R40 R41 R50 143
4.75K 3 2 R42 10K
(BLUE) 5.11K 1K
1/4W
104

LED2M R23 C15 C28

CN-DISP1M CN-DISP 10K 0.01 R61
SLR-342DC 1 374
TIMER
1 1 1/4W
R25 360
SW3M 2 2
R27 430
3 3
FILTER RESET 4 4
LED3M R26 430
5 5
SLR-342VC R24 360
FILTER 6 6 5V
IC3 5V (BLACK)
LED4M
ODOUR WASH SLR-342MC BR9080F (*Depend on Models) CN-TH1
INTAKE AIR TEMP
D DISPLAY C18 C26 C21
1
SENSOR
R46 2
1 10K R45 2 C41 R47 50V 0.01 (15K ,B=3950)
CWA742894 10K 10K 10
1/4W 1 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
4 SK WC 8 C30

P10

INTP5

INTP2

AVREF
AVSS
VSS

P05

P02

ANI5
P07

P04

P01
P00

ANI7
ANI6
P15
P14
P13
P12
P11
R62 50V
6 DO CS 3 15K 5V
10 (BLACK)
5 DI R/B 1 1 T02 ANI4 60
2 T06 ANI3 59 CN-TH2
7 3 RXD ANI2 58 PIPE TEMP
1
R66 5V 4 TXD ANI1 57 5V
2
SENSOR
10K
1/4W (GREEN) (GREEN) 5 SI ANI0 56 (20K ,B=3950)
IC7 6 SO AVDD 55 C39
GP1UA282RK CN-RCV1 CN-RCV C29 R63
7 SCK VDD 54 1 5.9K 50V
R32 R33 10
3 3 10K 5.1K 8 RESET VSS 53
1
Vout 1 2 2 R49 9 VDD IC1 P37 52
2 150K 10 X2 UPD784956AGC-121-8BT P36 51
C3 1 1 C34 C22 CN-NMODE
Vcc 2 10V 3 11 X1 P35 50 R57 5V
10 0.1 3300P 10K
2 1 12 VSS P34 49
C GND 3 X1 13 IC(VPP) P33 48
1/4W
4 3 CSTLS4M00G56-A0
14 P90 P32 47
Sensor Characteristics
(4MHz)
6 5 15 P91 T01 46 120
SIGNAL RECEIVER 16 P92 P30 45 R54 10K 115
8 7
CWA742895 17 P93 P67 44 110
18 P94 P66 43
CN-FLASH 19 P95 P65 42 R55 105
5V 5V 20 P40 P64 41 10K 100
IC4

P41
P42
P43
P44
P45
P46
P47
P50
P51
P52
P53
P54

P55
P56
P57
P60
P61
P62
P63
VSS
2 4 6 8 10 95
PST600DM C20
R48 0.01 1 3 5 7 9 90
100K 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
85
1 I O 3
G C27 R 80
C19
2 50V
75
0.01 2.2 E
S 70
5V 65
B k I

(
C23 R52
12V
1000P
IC5 10K
S 60
(WHITE) 12V UPA2003GR
T 55

)
R53 50
CN-STM 10K A
9 GND 8
1 1 N 45 2
2 2 10 7 C 40 1
STEPPING MOTOR 3 3 35
4 4 11 6 E
30
5 5
12 5 25
20
13 4 15
10
14 3
5
5V
R34 15 2 0
A 1K -10 0 10 20 30 40 50 60
16 1 TEMP ( C)
BZ BZ 1 Indoor intake air temp
PKM17EPP-2002 2 Indoor pipe temp

1 2 3 4 5 6 7 8 9 10 11 12
 INDOOR 2/2

Timer Table IC1

Indoor Microprocessor UPD784956GC-121-8BT
Function Time Test mode Pin No. Port No. Description Pin No. Port No. Description
24 hours OFF/ON timer 1 hour 1 min. 1 TO2 41 P64
Cooling FC max 30 min. 3 sec. 2 TO6 Buzzer Drive 42 P65

CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Hot start forced completion 7 min. 0 3 RXD Data Reception 43 P66
Hot start forced completion after deice 3 min. 18 sec. 4 TXD Transmission 44 P67
Auto mode judgment sampling time 180 min. 18 sec. 5 SI 45 P30
30 sec. 0 6 SO 46 TD1 Fan Speed Control
Sleep mode timer shift 60 min. 6 sec. 7 SCK 47 P32 Fan Motor ON/OFF 15V
120 min. 12 sec. 8 RESET Reset Signal 48 P33 + 5V
180 min. 18 sec. 9 Vdd + 5V 49 P34
300 min. 30 sec. 10 X2 4MHz Oscillation 50 P35
420 min. 42 sec. 11 X1 14MHz Oscillation 51 P36
Thermo off timer 3 min. 18 sec. 12 Vss GND 52 P37 Display Filter
Powerful mode operation time count 30 min. 0 13 IC(VPP) GND 53 Vss GND
Anti-dew formation control 20 min. 0 14 P90 Data 54 Vdd + 5V
Anti-freezing control 6 min. 0 15 P91 55 AVdd + 5V
16 P92 56 ANI0
17 P93 57 ANI1
18 P94 58 ANI2
19 P95 59 1ANI3
20 P40 60 ANI4 Pipe Temperature
105

21 P41 61 ANI5 Intake Air Temperature

22 P42 62 ANI6
23 P43 63 ANI7
24 P44 64 AVSS
25 P45 65 AVREF Power
26 P46 66 P00 Filter Reset
27 P47 67 P01 Test
28 P50 68 P02 Clock Pulse
29 P51 69 INTP2 Fan Speed Detection
30 P52 70 P04 Auto Switch
31 P53 71 P05
32 P54 72 INTP5 Remote Control Signal
33 Vss GND 73 P07
34 P55 74 Vss GND
35 P56 75 P10
36 P57 76 P11
37 P60 Stepping Motor 77 P12
38 P61 Stepping Motor 78 P13 Display Odour Wash
39 P62 Stepping Motor 79 P14 Display Power
40 P63 Stepping Motor 80 P15 Display Timer
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG
15.3. OUTDOOR UNIT (CU-2E15CBPG/2E18CBPG)

2-ROOM OUTDOOR 1/3

H
RED COIL (NH2)
4-WAY 3T CN-PUMP 1 2
ELECTRONIC 5V
PTC3 VALVES
CONTROLLER D4DDE100001
GREEN
(MAIN) PTC2
D4DDE100001
15V
RY-PWR
TERMINAL POWER AC-BLK LF101
FUSE 20.0A COIL BLACK G0B143N00001 C115 2P
L HOT1 HOT2 FM1 C47
C105 PC1 25V R38 R27 R26

XBA2C50TR0
250VAC BLACK BLACK RED R61 0.047 510K R40 499K 499K
N 39K TLP620 R44 8
4700P CR101 2W (GB) 5V 5.11K 3K 1/4W 1/4W
C108 C107 3
FUSE

AC230V 50Hz J0HBJY000004 1

5.0A

250VAC 250VAC
1 1 RY-HOT
C106 A00207M 5V R45 2 R32 1.00M C1 R35
G RY-AC CT101 1 4 C48 82P 34.0K R29 R28
AC-WHT 250VAC ETQ19Z59BZ 5.11K 4
4700P A00156 25V 499K 499K
WHITE 0.047 R33 1.00M 1/4W 1/4W
R86 C111 R47 C116 2P
1K 100P 4.99K
TERMINAL ROOM-A 2T R42
R62 R34 1.00M C3 R36

ZNR101
ZNR102
39K 2 3 R63 5.11K R39 510K 82P 34.0K R31 R30
D1 D2 2W 4.7K R41 499K 499K

510V
1

510V
R43 3K 1/4W 1/4W
7 5
TO INDOOR R65 5.11K
2 RED D3 D4 4.7K
UNIT A 6 C117 C2 R37
DATA1 5V C112 R46 2P 82P
100P 4.99K IC3 34.0K
3 Q9 AN1393S
D1-4 2SC2412KTX
B0ACCK000005 R66 D10
ZNR103 1.65K 1% B0ACCK000005
ERZVGAD102
R67 D12
590 B0ACCK000005

TERMINAL ROOM-B C45

F VR1
200
10V
220
1
TO INDOOR BROWN ZNR104
UNIT B 2 ERZVGAD102 ECU1 19 23 17 8 2 15 14 12 10 6 4 2 7 5 20
DATA2
3
CN201 19 23 17 8 2 15 14 12 10 6 4 2 7 5 20
5V 5V R201 R208
1K 1K
COIL 3T ZNR105 R212 R239 R206 R205 R207 R213 CN201 ECU1
7.5mm JP 10K 3K D201 C204
1K 1K 1K 10K
R209 B0ACCK000005 C203
1K 0.01 0.01 28 28
C202 R235 30 30
GREEN FG1 5V 0.01 100K
C205
COIL 2T 0.01
ECU1 CN201 R225
BLACK 4.7K 24 24
E AC1
25 25 26 26
C208 C213
ZD7 D5 25V 5V 22 22
ERA15-10 1000P 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
AC2 ZD6 36V 1/2W 0.047 R218 C207 R216 32 32
36V 1/2W IC208

ANI5
RTP02
RTP07
RTP06
RTP05
RTP04
RTP03

INTP0

AVREF
AVSS
ANI7
ANI6
VSS
P07

P03
P02

NMI
INTP5
INTP4
INTP3
BLACK 47K 1000P 10K 5V
TC4052BF 5V
R133 R132
R1 R224 5V IC203 1 P16 ANI4 60
106

1.21K 1% 1M PST600DR R236 R238 R204

18K 3W 27 27 1 Y0 VD 16 10K 2 T06 ANI3 59
D17 100K 20K 1K
ERA15-06 2 Y2 X2 15 3 RXD ANI2 58
I O 37 37
3 Y X1 14 C215 4 TXD ANI1 57 5V
2 1 3 4 C211 G C201
R131 4 Y3 X 13 R217 25V 16V 5 SI ANI0 56 0.01
D6 R136 5V C46 ZD2 1.5
13K 2W 100V 30V 1/2W 5 Y1 X0 12 10K 0.047
6 SO AVDD 55 12V 12V
ERA15-06 20.0K 1% C216
22
ZD1 6 INH X3 11 7 SCK VDD 54 C212
3 4 2 1 X201 25V 16V
AC2 AC1 R140 R144 30V 1/2W 7 VEE A 10 6.144MHZ 8 RESET VSS 53 0.047 10 33 33
BLACK BLACK 30K 22K R137 R4 D16 8 VSS B 9 R245 10K
1/4W 1/4W PC6 5.6K PC7 100K
ERA15-01 R237 9 VDD IC201 P37 52
R246 10K
34 34
TLP421(BL) TLP421(GR) R223 150K 10 X2 A52D4956G122 P36 51
FUSE1 3.15A Q13 5V
10K 5V 11 X1 P35 50
R247 10K 5V 5V
XBA2C31TR0 R141 R145 R134 5V R248 10K
12 VSS P34 49
D 30K
1/4W
22K
1/4W
680
13 IC(VPP) P33 48
R249 10K 39 39
ZNR1 R135 R226 IC202 C217
47K 31 31 4.7K 16V R219 R221 14 P90 P32 47
510V BR9080 10K 10K
R142 R146 29 29 10 15 P91 T01 46 41 41
30K 22K
4 1 2 1/4W 1/4W Q13 Q12 C209 1 R/B WC 8
16 P92 T00 45 5V 3 3
2SC2412KTX R3 DTC143XK ZD4 ZD5 R220 R222 17 P93 P67 44
36V 1/2W 36V 1/2W
1000P 2 VCC GND 7 10K 10K R215
1.21K 18 P94 P66 43 10K
T1 R143 R147 3 CS D0 6 R244
A401039 30K 22K 19 P95 P65 42 51K
1/4W 1/4W 5V 4 SK DI 5
R8 1M 20 P40 P64 41
2 1 15V

P41
P42
P43
P44
P45
P46
P47
P50
P51
P52
P53
P54

P55
P56
P57
P60
P61
P62
P63
VSS
7 10 Q8
R5 5V 5V R210 R227 DTA143XK
20.0K 3 4 100 47K 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CN-DC CN-DC 12V 3 4 R7 D202
680 RB501V-40
PC4 C206
1 1 PC5 TLP421 2 1 0.01
Q7
C1 TLP421 CN-MODE
DB1 25V 2 2 (GR) R233 5V DTC143XK
S1WB60B 6800 (BL) 10K R16 R17 R19
3 3 1 1K 5.11K 10K
C R1 4 4 R90 2 35 35
2K 5.6K Q6
DTC143XK 3 C38 R18 C39
C52 1000P 5.11K 50V
25V 4 10
0.047
5
ELECTRONIC R6
47K
45 45 5V
6
CONTROLLER 7
(POWER) Q5
2SC2412KTX
49 49 R228 8
10K
47 47
(MX8)
CWA742957 ELECTRONIC
CONTROLLER
120 IC204-206 (CPU)
Fig 1 115 TD62003AF
Sensor Characteristics 110 R211
105 12V 12V 12V 1K
B 7 6 5 4 3 2 1 7 6 5 4 3 2 1 7 6 5 4 3 2 1
100
8 9 8 9 8 9
95 R232 R202 R203 R240
50 50 D203-210 10K 1K 1K
90 EXPANSION VALVE1 CN-EV1 1K
85 (XH6) 48 48 RN501V-40 IC204 10 11 12 13 14 15 16 10 11 12 13 14 15 16 10 11 12 13 14 15 16
R 80 1 46 46 IC205 R234 C218
75 2 44 44 IC206 10K 0.01
E
70 3
S 65 D203 D204 D205 D206
(

4 D207 D208
k I 60 12V
D209 D210 12V
S 55 4 5
)

50 6 CN201 42 40 38 36 9 13 11 18 16 43 1
T
45 2
A 1

RY-AC
40 EXPANSION VALVE2 CN-EV2 ECU1 42 40 38 36 9 13 11 18 16 43 1 D18
N 35 ERA15-01
C 30 3 1 R15
10K
RY-PWR

E 25 2

RY-HOT
5V
A 1 Outdoor air temp. 20 3 12V
2 Pipe temp. A,B 15 4 Q10
10 12V (NH2) (NH2)
3 Heat exchanger temp. 5
5
CN-S 1 2 1 2 R48
2SC2411KRTX
4 Discharge temp. 0 6 10K
TEST
-10 0 10 20 30 40 50 60
TEMP( C)

1 2 3 4 5 6 7 8 9 10 11 12
 2-ROOM OUTDOOR 2/3
H
REACTOR

GRY2 GRY1
GRAY GRAY

DB101
A54D25XB60L

3
LJP101 A67C4053 A67C4054 A67C4054
2 1
R98
A67C4053 LJP102 C101
400V
JP6 C102
400V
LJP105 LJP106 232K R100
232K 1/4W
G
750 JP7 750 1/4W
4 R99
232K
R101
JP8 232K 1/4W 15V

JP10
JP11
JP12
JP13
1/4W D20
R117 JP9 R105 R102 T101 RB501V-40
100K 1/4W 232K
1/4W
232K 1/4W ETXMJ326X1C
D7

CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

LJP103 R106 R103 FUSE1 ERA22-04
C103 R115 232K 232K 1/4W 3.15A IC4
A67C4056 350V 100K 1/4W 1/4W 1 I O
XBA2C31TR0
65 G R148 5 7
LJP109 R114 R107 d C10 C11 C12 68
100K 1/4W 11.5K R104 25V 0.01 0.01 1/4W
A67C4057 LJP104 LJP107 LJP108 470 6 CN-FM1 (XH7-5)
11.0K 1% C18
250VAC IC1 D19 12V FAN MOTOR
A67C4056 A67C4055 A67C4055 e 1
4700P NJM78M15F B0ACCK000005
C43 2
R50 R93 630V 3
f 27 27 15V 0.22
D8
ERB83006
1/4W 1/4W R20
510K
4
5
FM F
RY-C 2 R53 R94 1/4W
K6B1AGA00082 C14 27 27 6
25V R2 1/4W 1/4W
470 4.7K 7
3 IC2 R21 C42
15V 5V 5V 510K 25V
PC2 NJM78M05F 1/4W 0.047
TLP521(BL)
I O R23 R25
G C40 10.0K 100
ECU2 3 2 4 5 C54 C15 C16 8 1/4W
4 1 50V 16V 1000P 3
0.01 1
DB102 10 100
A54D25XB60L 3 R111 CN401 3 2 4 5
470 2
D9 4
ERA22-04 IC4
2 1 3 2 AN1393S
Q2
2SC2411KRTX
C410
50V
C411
50V
D400
B0ACCK000005
R400
5.49K
ELECTRONIC b 5
C17 R52
R22 R24 C41
10 10 1% CONTROLLER 25V 4.7K
1/4W 73.2K 4.99K 0.01
4 R401 C413 470
ECU2 CN401 R402
1.8K 5 374K 1000P (ECU2) a 6
E
R108 7
10 10
47
Q4 IC401 6 R403 C401
30A Q3 IC401 C402 51.1K 0.01
AN1393S 0.01 Q402
2SC1036KRTX
R109 DTA143XK CN401 ECU2 Q1
10K 15V PS21245-AT
R112 D11
18K Q401 R54
33 ERA22-06
13 13 DTA143XK 11 11 2W 3
R110 C19 C20 HVIC1
PC3 R404 12 12 C13 25V 25V 4
10.0 C403 25V C27
1/4W TLP521(BL) 49.9K C412 47 0.047
P
0.047 8 1000P R405 R406
180 25V 2 VCC C
3 R55 680 0.047 C37
107

1 100 7.87K 1 IN HO 630V

1 4 COIL COIL
R113 D13 C113 0.47
U
2 1000P COM CE RED
0.1 R116 C44 C404 R407 C405 R408 ERA22-06 U
5Wx2 17.4K 1500P IC401 4 0.01 15K 0.82 2.74K 7
1/4W
C21 C22 HVIC2
25V 25V 8
2 3 47 0.047 C28
JP14 D401 R415 R56 680
25V
0.047
6 VCC C D
R412 B0ACCK000005 5 IN HO
JP15 R409 3.74K 3.74K
12V 1.8K IC402 D14 C25 V
AN1393S R414 C414 0.047 COM CE BLUE
ERA22-06 V
8 R417 374K 1000P 12
R410 100 5 C23 C24
RY-C 14 14 100 3 7 HVIC3
1 25V 25V 13
8 8 47 0.047 C29
6 25V 10 VCC C
D15 R411 2 R413 C408 R416 9 9 R57
10K
C407 15.0K 82.5K
680 0.047
4 0.01 0.01 9 IN HO
IC402 IC402 C26 11 COM CE w
ERA15-01 ZD3 0.047 C30 YELLOW
10V 1/2W Q403 C406 C409 W
0.82 0.01 25V LVIC
2SC2411KRTX 0.047
COMPRESSOR
CN401 6 7 1 14 VCC U OUT
R58 R64 R68-85,91,92
680 82.5 0.1 1/4W X 18
ECU2 6 7 1 19 IN(X)

R68

R70

R72

R74

R76

R78

R80

R82

R84

R91
R59 C36
680 V OUT 25V
20 IN(Y) 0.022 C
R60 C118

R69

R71

R73

R75

R77

R79

R81

R83

R85

R92
680 25V
21 IN(Z) 0.022
W OUT

18 VFO 5V
N
C31 C32 C33 C34 C35
5600P 5600P 5600P 5600P roc
25V R9 R10 CN-TH2
15 GND CCT 0.022 20.0K 20.0K
1 PIPE TEMP SENSOR A
17 16 (20K ,3950)
2
3 PIPE TEMP SENSOR B
C4 C5 (20K ,3950)
50V 50V 4
5V 10 10

B
R11 R12 CN-TH1
15.8K 15.0K (XH4) OUTDOOR AIR
1 TEMP SENSOR
2 (15K ,3950)
3 HEAT EXCHANGER
C6 C7
50V 50V 4 TEMP SENSOR
10 10 (4.96K ,3800)

5V CN-DIS
(XH3)
1 DISCHARGE
2 TEMP SENSOR
5V
3
(50K ,3975)
C8 R13
R14 50V
15.8K
1%
10
4.99K
CN-TH3 A
1 HEAT EXCHANGER
C9 2 EXIT TEMP SENSOR
50V
10 3 (4.96K ,3800)

Fig.1

13 14 15 16 17 18 19 20 21 22 23 24
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG
2-ROOM OUTDOOR 3/3

Timer Table Outdoor IC201

Outdoor Microprocessor A52D4956G122
Function Time Test mode Pin No. Port No. Description Pin No. Port No. Description
First deice operation time 60 min. 6 sec. 1 P16 +5V 41 P64
Deice operation starting 45 sec. 4.5 sec. 2 T06 42 P65
Deice forced completion 10 min. 30 sec. 63 sec. 3 RXD Data Reception 43 P66 PFC Abnormality Detection
Deice operation completion 59 sec. 5.9 sec. 4 TXD Data Transmission 44 P67
Deice detection 40 min. 8 sec. 5 SI 45 TO0
80 min. 16 sec. 6 SO 46 TO1 Fan Speed Control
120 min. 24 sec. 7 SCK 47 P32
Compressor forced operation time 30 sec. 0 8 RESET Reset Signal 48 P33
Compressor operation frequency step up 60 sec. 0 9 Vdd +5V 49 P34
Deice operation starting 3 degrees C 3 min. 1.8 sec. 10 X2 6MHz Oscillation 50 P35
DC peak detection after compressor restart 30 sec. 0 11 X1 6MHz Oscillation 51 P36
12 Vss GND 52 P37
13 IC(VPP) 53 Vss
14 P90 Expansion Valve 1 Drive 54 Vdd
15 P91 Expansion Valve 1 Drive 55 AVDD + 5V
16 P92 Expansion Valve 1 Drive 56 ANI0 Heat Exchanger Exit Temperature
17 P93 Expansion Valve 1 Drive 57 ANI1 Heat Exchanger Temperature
18 P94 PFC 58 ANI2 Outdoor Air Temperature
19 P95 59 ANI3 Compressor Discharge Temperature
108

20 P40 Expansion Valve 2 Drive 60 ANI4 Running Current

21 P41 Expansion Valve 2 Drive 61 ANI5 Pipe Temperature A
22 P42 Expansion Valve 2 Drive 62 ANI6 Pipe Temperature B
23 P43 Expansion Valve 2 Drive 63 ANI7 DC Voltage
24 P44 64 AVSS
25 P45 65 AVREF
26 P46 66 NMI DC Peak Detection
27 P47 67 INTP0 Fan Speed Detection
28 P50 LED 201 Drive 68 PO2 Pump Down
29 P51 Terminal for servicing 69 PO3 Ry-AC Drive
30 P52 PFC Drive 70 INTP3 Compressor Revolution Detection
31 P53 RY-PWR Drive 71 INTP4 Compressor Revolution Detection
32 P54 RY-HOT Drive 72 INTP5 Clock Pulse
33 Vss GND 73 PO7 73 PO7
34 P55 Data 74 Vss
35 P56 75 RTPO2 Compressor Drive U
36 P57 LED 202 Drive 76 RTPO3 Compressor Drive V
37 P60 LED 203 Drive 77 RTPO4 Compressor Drive W
38 P61 Test ( Timer shorten ) 78 RTPO5 Compressor Drive U
39 P62 79 RTPO6 Compressor Drive V
40 P63 80 RTPO7 Compressor Drive W
 15.4. OUTDOOR UNIT (CU-3E23CBPG/CU-4E27CBPG)

3, 4-ROOM OUTDOOR 1/2

H

S104 S103
1 1
2 2

X1M
TERMINAL BOARD
HE E (GRN/YLW)
C3 C5 C7
FU1 ECN1 (GRN) AC250V AC250V AC250V
0.01 0.01 0.01
D(4) C(3)
AC250V (RED) C2
30A L1 AC250V
L HR AC1 6 mH 2.2
C4 C6 C8 B(2) A(1)

CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

AC250V AC250V AC250V
G AC230V
50Hz SA1
V2
0.01 0.01 0.01
V3 C1
780NR-14D-201 AC250V L4
N 780NR-14D-201 (BLK) 1 1.5 mH
HS AC2 17.5VACT
0IS12A 5V
L101 PC817C/D
50 H
0IS15A 0IS15B 4 1 R37
PC814A/X1 PC814A/X1 10K
C37
JP5
R43 1 4 0.001
R36
Sensor Characteristics
X2M 1K 1K
JP101 R44
C40
0.001
3 2 120
JP1 91K 2W
2 3
C38
50V
C39 R42 R38 0IS12B 115
1 S15 0.1 536 20K
To INDOOR 0IS16A 0IS16B 1 PC817C/D 110
2 1
UNIT-A PC814A/X1 PC814A/X1 105
3 R45 1 4 100
3 1K
X3M C41 95
R46
F 5 91K 2W
0.001
2 3 90
1 85
To INDOOR
UNIT-B 2 80
R
3 75
R9
R47 E
X4M 18K 2W 70
S 65
ZD1 D12 I

(
To INDOOR 1 1ZC56 GP10-4005E
R104 k 60
UNIT-C HIC3 10K S
2 AS1701768 5V
5V
55
C11 R11
T

)
3 220V100 15K 1W
S90 50
X5M
8 2
OUTDOOR AIR 1
A 45
R10 4
100K TEMP. SENSOR 2 N 40
HEAT EXCHANGER 3
1 R105
3
4
C 35
E *To INDOOR
UNIT-D 2
200
TEMP. SENSOR
5 E 30
1/2W DISCHARGE 6 D18 - 33
3 C111 TEMP. SENSOR RMPG06G
25
AC250V 12V IC6
0.001 S20
D18 TD62084AP 20
6 1 1
D19 15
2
109

HIC4 EXPANSION D20 10

M 3 1 16
S11 AS1701768 VALVE COIL A D21
R12 4 5
15K 1W 5 2 15
7 5 3 1 0
8 2 6
4
7 5 3 1 S21
3 14 -20 -10 0 10 20 30 40 50
3 1
D22
4 13 TEMP( C)
S10 D23
2
EXPANSION 3
D24
5 12 Outdoor air temp
C112 VALVE COIL B M 4
D25
Heat exchanger temp
AC250V 5 6 11
0.001 Gas pipe temp.a,b,c,d,
D 6 1 6
Liguid pipe temp.a,b,c,d,
7 10
HIC5
S22 Discharge temp
D26
R13 AS1701768 1
D27
8 9 Heat sink temp
15K 1W 2
EXPANSION D28
8 2 M 3
VALVE COIL C D29
4 4
5
3 6
S23 5V HIC1
D30 M68954
1
C113 D31
AC250V 2
D32
0.001 EXPANSION M 3 3 +5V
6 1 * VALVE COIL D 4
S23-4 D33
18 PAM ON/OFF
5 20
HIC6 6 59 Heating Mode Operation
R14 AS1701768 5V 61 Cooling Operation Mode
C 15K 1W S91 36 Power
8 2 3 38 Data Transmission A
4 2 40 Data Reception A
HEAT SINK
TEMP. SENSOR 1 42 Data Transmission B
3 44 Data Reception B
C114
AC250V J1A 46 Data Transmission C
0.001 1 48 Data Reception C
C110
0.1 2 50 Data Transmission D
J1
52 Data Reception D
6 1 63 Gas piping Temperature
65 Gas/Liquid piping Temperature
IC7 67 Gas/Liquid piping Temperature
5V 69 Gas/Liquid piping Temperature
TC4051BP 5V
GAS PIPE TEMP. 5V 75 Outdoor Air Temperature
SENSOR S92 S6
73 Heat Exchanger Temperature
1 1 X4 VDD 16 1 71 Compressor Discharge Temperature
(UNIT-A) R49 33K C45 16V10
2 C44 2 TP1 15 Heat Sink Temperature
2 X5 X2 15
3 100P 3 43 Expansion Valve 1
B (UNIT-B) 4
R50 33K C46 16V10
3 C0M X1 14 4 41 Expansion Valve 2
5 5 39 Expansion Valve 3
(UNIT-C) R51 33K C47 16V10 4 X7 X0 13
6 6 37 Expansion Valve 4
7 5 X6 X3 12 7 45 Expansion Valve A
R52 33K C48 16V10
*(UNIT-D) 8
6 INH A 11
8
S4 R2
10K
R60
10K
47
49
Expansion Valve B
Expansion Valve C
7 VEE B 10 J12 51 Expansion Valve D
1
8 VSS C 9 MR8 53 Check Valve
2
LIQUID PIPE TEMP. 3
19 Fixed Frequency Mode
SENSOR S93 21
4
1 23
(UNIT-A) R53 33K C49 16V10 S1 17
2 R1 R57
3 1 10K 10K 25
(UNIT-B) R54 33K C50 16V10 27
4 2
5 3 33
(UNIT-C) R55 33K C51 16V10 35
6 4
7 31
R56 33K C52 16V10 J10A J10
A 29
*(UNIT-D) 8
9 *Mark parts are not
equiped in the
1
2
CU-3E23CBPG.

1 2 3 4 5 6 7 8 9 10 11 12
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG
3, 4-ROOM OUTDOOR 2/2
H

DBS25VB60
R5 (YLW) H1 REACTOR HIC7 R204 100 2W C205 0.0033
MRM20B 82 ECN2
3 2 10W L2 P2 P1
60 H
3 4 R120
(BLU) H2 L1 L2 P1 N1 P2 C201 75K
TPCT2 630V 2W
MRM10B C9 0.22 FU201
AC250V D13 - 16 5V AC250V
FU2 3.3 1SS133 R121
AC250V 5 3 3A
CT1 R201 75K
3.15A JP4
ETQ19Z60AM R8 D17 10 2W
4 1 D14 D13 1K 1W
1SS133
3 4
TPCT1 CT S104 N1 G
C20 R7 C21 U 2 C202 C203 C204
D16 D15 25V 25V 450V 450V 450V
MRM11B L3 C10 47 560 47 V 1 500 500 500
60 H AC250V
3.3 W
5V C73
0.001 HIC2 S33
5V HA6675 1 S70 FAN MOTOR
Q8 7
DTA114EKA 1 +5V 6
2 POSITION DETECTION U 17 4 POWER FACTOR CONTROL INV DREIVE CIRCUIT
R117 3 LEVEL SIGNAL V 19
0IS8B
560
1/10W PC817B/X2 4 GND W 21
C210
4
3
FM
7 7 CN11 CN14 630V 2
10 +15V 12 ST+ 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 0.22
1 4 R99 1
3.6K 8 N 13 STG DEFROST REVERSING
R118 11 -15V 14 ST- 10 SOLENOID SOLENOID S72
10K V5
1/10W C81 C80 C79 470NR-14D-204 MRB8 S80
VALUE COIL VALUE COIL 1
2 3 16V 16V
100
16V
100
3 2
1 (2-WAYS) (4-WAYS) 2 F
100
MRD8 3
0IS8A 3 2 4
3
PC817B/X2 MRC/W8 5
3 2
5 COMPRESSOR
V6 V7 V8 8
AVR-S14D471K AVR-S14D471K AVR-S14D471K 7 L5
5V 17.5VACT 8
0IS1A,B Q1 U 4 3
9 U 1 1
PC817A/B/C/D 2SC3052 V 6 5
R6 V 2 2
1 4 R80 51 S31 W 8 7
D43 5W W 3 3
1SS133 7.5K
R73 1 S34
10K 0IS1B Q1 2
N 4 4
1
2 3 3 CONNECTOR
R81 4 (WHITE)
0IS1A R79 C67 3.6K 5
2.4K 330P 4
6
1 4
D44 R83
7
8
E
1SS133 7.5K 7
R74 9
10K 0IS2B Q2
0IS2A,B ELECTRONIC
2 3 R84 PC817A/B/C/D 10 CONTROLLER
3.6K
0IS2A R82 C68 Q2 POWER(INVETER)
2.4K 330P 2SC3052 3 DB2 IC2 17.5VACT
S1NB60 T1 D5 P18V1 TA7818SB D36
1 4 RMPG06G D1N58 TP17.5V
D45 R86 0IS3A,B 4 1
7.5K PC817A/B/C/D 15 6 I O S32
1SS133
R75 0IS3B C18 G C90 5
10K Q3 D1 25V C86 C87 25V 5VF
C12 RPG10KE D54 4
Q3 2 R15 RMPG06G 220 0.1 0.1 220
2 3 R87 400V 3
110

2SC3052 430K ELECTRONIC

3.6K 22
1/2W C14 R16 7 TP5VF 2 5V
0IS3A R85 C69 630V CONTROLLER
2.4K 430K 1
330P 0.1 1/2W C88
0IS4A,B 16V SUB
17
PC817A/B/C/D R17
100 TP32
1 4 R89 IC1 8 LED-4
D46 D2 47 SLZ-9818-09
D55 R76 0IS4B
1SS133 7.5K
C13 STR-L472 RMPG06G 1/2W 12V D
1SS133 10K Q4 2KV 19 D6 D56
220P RMPG06G 1SS133 GNDACT
Q4 C15 TP12V
2 3 R90 R18 1
3.6K 2SC3052 50V LED-3
3.3K C24 IC4 5V
0IS4A R88 C70 8 1 2 3 4 10
R23
SLZ-9818-09
2.4K 330P 20 D7 25V P5V1 AN7805FA
10K
0IS5A,B

DRIVE AMP.
RMPG06G 470
TP5V R100
PC817A/B/C/D 2 I O 2.2K
1 4 R92 D3
D47 4 G C28 LED-2
1SS133 7.5K RMPG06G R22 C25 C26 C27 SLZ-9818-09
R77 25V 10V
10K 0IS5B Q5 10K
220
0.1 0.1 100
TP2
2 3 R93 Q5 3 TP200
3.6K 2SC3052 10 7 9 5 3 R19 C29 C30 R101 TP201
0IS5A R91 C71 R26 LED-1 5.6K
2.4K
1.8K R24 D8 35V R25 1K
25V SLZ-9818-09 1 SW4A
26 330P D4 RMPG06G 220 1
0IS6A,B 6.2 5.6K
RMPG06G GND S52 2 SW4B
Compressor Drive U phase 10 PC817A/B/C/D 4 VIN
Compressor Drive V phase 8 1 4 R95 15V 1
D48 R20 680 R102 TP202 3 SW4C
Compressor Drive W phase 6 1SS133 7.5K
0IS14B D9 0IS14A 2 LED-A 2.2K
R78 0IS6B R21 C16 RMPG06G PC817D/X4 4
Compressor Drive X phase
Compressor Drive Y phase
4
5
10K
2 3
Q6
R96
Q6
2SC3052
C17
470P
1.4
1/2W
PC817D/X4 2200P 9
R31 R136 R137 R138
TP15V 3
4
SLZ-3818-09
*SW4D C
Compressor Drive Z phase 7 3.6K
C31 C76 1K R33 1K 1K 1K 5 R103 TP203
INTO(OCP) 9 0IS6A R94 C72 5VF
25V 0.1 2W 9.76K 2W 2W 2W TP22 6 560
2.4K 330P PST+ D10 220
Rotor Position Detection 16 C65 R97 RMPG06G 7
Level Signal Input 14 0.001
1K
1 8
ST+ 11 SW3
PMW Output 12 C35 GNDP 9 S0R-112HS
D38 1SS133 4 1 C33 R32 R34
DC Fan Output 11 FAN 0UT PSTG 25V 1K 6.8K 10 1 2
R71 0.1 100 C32
DC Fan Input 13 FAN IN 390 R98 11
C66 10K
2 0.1 SW1: FORCED OPERATION
Input Power Reception 24 VIN 1/2W 0.01 STG 12 12 SW1
MRC/WA 1/10W ON/OFF SWITCH
OL/HPS 54 3 2 12V C36 S0R-112HS
C34 SW2: FORCED COOLING/HEATING
CT 22 CT R72 OVERLOAD PST- 0.1 25V D11 IC5 1 2
200 D39 1SS133 0IS7B 0IS7A S40 PROTECTOR 100 RMPG06G CHANGOVER SWITCH
MM1431ATT R35
1 (COMP) ST- 13 3.3K SW3: WRONG WIRING
SW5
0IS7A,B 2 10 S0R-112HS CONNECTION CHECK SWITCH
4WAY VALVE VMRC/W 55 MRDA D41 1SS133 PC817A/B/C/D 3
IC8A,B,C 15V 15V 1 2 SW4: PRIORITY ROOM
MRD 57 4 D34 SETTING SWITCH
5V LA8393M 15V
MRM11 32 D40 1SS133 Q7 1SS133 TP205 SW5: QUIET OPERATION
MRM20 34 MRM20A S101
MRM10 30
MR8 5V
DTA114EKA
0IS9B R67
3.3K
1 AT NIGHT SWITCH B
1 IC8A FANIN PC817B/X2 2
OL 28 MRM11A 8 R65 SW2
D42 1SS133 D37 1SS133 2 3 20K
LED-4 Drive 66 15V 1 1 5V 4 1 SSR-121MVB
3 0IS11A IC8C 1/10W
3
LED-3 Drive 68 R58 2 C57 R64
4 10K PC817A/B/C/D 1K 15V S102 S2
LED-2 Drive 70 MRM10A MRBA 0.1 C61 C62
5V 5 4 0IS10A 0.001 0.001
LED-1 Drive 72 1 4 1 1
4 1 PC817C/D S71
LED-A Drive 74 S51 3 2 2 2
C60 1
Priority Room Setting 56 C53 C54 15V C59 R66 25V 3 3
1 0.001 0.1 0.001 750 0IS9A 2
Wrong Wiring Checking 58 R61 100 4 4
2 PC817B/X2 3
Forced Operation Switch 60 3 2 100 2 3 5 5
3 4
Quiet Operation at night 62
4 FANOUT 0IS10B 5
Forced Cooling/Heating Changeover 64 R69 R68
12V 5 0IS11B 5 C55 R62 C58 C56 C64 PC817C/D PLV 330K 330K
6 PC817A/B/C/D 7 100P 1.13K 0.1 100P 0.001 1/2W 1/2W
7 6
+12V 76 8
8 R59
GND 1 6.8K C103 R63 R70
9 IC8B 0.1 1K 15K
GND 2
10
GND 77
11 A
12

13 14 15 16 17 18 19 20 21 22 23 24
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16 Exploded View & Replacement Parts List

16.1. CS-ME7CKPG/ME10CKPG/ME12CKPG/ME14CKPG/ME18CKPG
16.1.1. Exploded View

Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.

111
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.1.2. Replacement Parts List

<Model: CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG>
Ref. Part Name & Description Q’ty Part No. Remarks
No. CS-ME7CKPG CS-ME10CKPG CS-ME12CKPG CS-ME14CKPG CS-ME18CKPG
1 TERMINAL BOARD COMPLETE 1 CWA28K1045 ← ← ← ← ●
2 SENSOR COMPLETE (PIPE) 1 CWA50C2101 ← ← ← ← ●
3 SENSOR COMPLETE (INTAKE) 1 CWA50C2103 ← ← ← ← ●
4 PC BOARD (MAIN) 1 CWA73C1332 CWA73C1333 CWA73C1334 CWA73C1335 CWA73C1336 ●
5 PC BOARD (RECEIVER) 1 CWA742895 ← ← ← ← ●
6 PC BOARD (DISPLAY) 1 CWA742894 ← ← ← ← ●
7 REMOTE CONTROL CONPLETE 1 CWA75C2311 ← ← ← ← ●
8 FAN MOTOR 1 CWA981056 ← ← ← CWA981073 ●
9 MOTOR-AIR SWING 1 CWA98259X ← ← ← ← ●
11 FRONT GRILLE COMPLETE 1 CWE11C2681 ← ← ← ← ●
12 DISCHARGE GRILLE COMPLETE 1 CWE20C2174 ← ← ← ←
14 CROSS-FLOW FAN COMPLETE 1 CWH02K1016 ← ← ← ←
15 HOLDER CORD 1 CWH31103 ← ← ← ←
16 HOLDER SENSOR 1 CWH32137 ← ← ← ←
17 HOLDER REMOTE CONTROL 1 CWH361008 ← ← ← ←
21 CAP(FRONT GRILLE) 2 CWH521025B ← ← ← ←
22 NUT 1 CWH56081 ← ← ← ←
23 SCREW SET 1 CWH82C1155 ← ← ← ←
24 BELT 1 CWH881003 ← ← ← ←
25 LEAD WIRE COMPLETE(AIR SWING) 1 CWMA60C0001 ← ← ← ←
26 TERMINAL PLATE FOR EARTH 1 CWMA64C0001 ← ← ← ←
27 EVAPORATOR 1 CWMB30C0020 ← CWMB30C0019 ← ←
28 AIR FILTER 2 CWMD000001 ← ← ← ← ●
29 CHASSIS COMPLETE 1 CWMD50C0014 ← ← ← ←
30 PARTICULAR PLATE (EVA) 1 CWMD910002 ← ← ← ←
31 PARTICULAR PLATE (DISPLAY) 1 CWMD930001 ← ← ← ←
32 PARTICULAR PLATE (DISPLAY) 1 CWMD930002 ← ← ← ←
33 PARTICULAR COVER (FAN MOTOR) 1 CWMD930003 ← ← ← ←
34 PARTICULAR COVER (PIPE) 1 CWMD930009 ← ← ← ←
35 GRILLE DOOR 1 CWME140001 ← ← ← ←
36 INTAKE GRILLE 1 CWE22K1161 ← ← ← ←
37 LOUVER 1 CWME240001 ← ← ← ←
40 CONTROL BOARD BOX 1 CWH102172 ← ← ← ←
41 CONTROL COVER-1 1 CWMH130001 ← ← ← ←
42 CONTROL COVER-2 1 CWMH130002 ← ← ← ←
43 CONTROL COVER-3 1 CWMH130003 ← ← ← ←
44 INSTALLATION PLATE 1 CWMH36K0002 ← ← ← ←
45 SHAFT FOR LOUVER 1 CWMH630001 ← ← ← ←
46 TUBE ASSY 1 CWMT00C0015 ← CWMT00C0005 ← ←
47 DRAIN CAP 1 CWRH520001 ← ← ← ←
48 FLUCRUM 1 CWRH64K0001 ← ← ← ←
49 DRAIN HOSE 1 CWRH850001 ← ← ← ←
50 FLARE NUT (1/4) 1 CWT25086 ← ← ← ←
51 FLARE NUT (3/8) 1 CWT25087 ← ← ← ←
54 ZNR 1 ERZVEAV201 ← ← ← ←
55 ZNR 1 ERZVEAV511 ← ← ← ←
56 FUSE (250V, 3A) 1 K5E312BB0002 ← ← ← ←

(Note)
· "●" marked parts are recommended to be kept in stock.
· All parts are supplied from ACD, JAPAN (VENDER CODE : 00025800).

112
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.2. CU-2E15CBPG/2E18CBPG
16.2.1. Exploded View

Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.

113
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.2.2. Replacement Parts List

<Model: CU-2E15CBPG / CU-2E18CBPG>
Ref. No. Part Name & Description Q’ty Part No. Remarks
CU-2E15CBPG CU-2E18CBPG
1 TERMINAL BOARD COMPLETE (3P) 1 CWA28K1045 ← ●
2 TERMINAL BOARD COMPLETE (4P) 2 CWA28K1046 ← ●
3 VALVE COIL 1 CWA43C2112 CWA43C2086 ●
4 EXPANSION VALVE COIL 2 CWA43C2086 ← ●
5 THERMISTOR(OUTDOOR, COND TEMP) 1 CWA50C2088 ← ●
6 THERMISTOR(PIPE A.B TEMP) 1 CWA50C2089 ← ●
7 THERMISTOR(DISCHARGE TEMP) 1 CWA50C2090 ← ●
8 THERMISTOR(COND EXIT TEMP) 1 CWA50C2097 ← ●
9 LEAD WIRE COMPLETE (COMP) 1 CWA67C4539 ←
10 PC BOARD (MAIN) 1 CWA73C1353 CWA73C1354 ●
10-1 PC BOARD (POWER) 1 CWA742957 ← ●
11 FAN MOTOR 1 CWA981072 ← ●
12 4-WAY VALVE 1 CWB001017 ← ●
13 3-WAY VALVE (1/4) 2 CWB011080 ← ●
14 3-WAY VALVE (3/8) 2 CWB011081 ← ●
15 DRYER 1 CWB101011 ← ●
16 STRAINER 1 CWB111004 ←
17 CONDENSER 1 CWB32C1160 ←
18 CHASSIS COMPLETE 1 CWD50K2058 ←
19 FAN MOTOR BRACKET 1 CWD541021 ←
20 HOLDER 1 CWD791001 ←
21 CABINET SIDE PLATE 1 CWE04C1015 ←
22 HANDLE 1 CWE161001 ←
22-1 OPERATION INSTARUCTIONS 1 CWF563678 ←
22-2 INSTALLATION INSTARUCTIONS 1 CWF612315 ←
23 SOUND PLOOF MATERIAL 1 CWG302138 ←
24 SOUND PLOOF MATERIAL 1 CWG302139 ←
25 PROPELLER FAN 1 CWH03K1005 ←
26 CONTROL BOARD-1 1 CWH102135 ←
27 CONTROL BOARD-2 1 CWH102136 ←
28 CONTROL BOARD-3 1 CWH102164 ←
29 CONTROL BOARD COVER-1 1 CWH131116 ←
30 CONTROL BOARD COVER-2 1 CWH13C1073 ←
31 TERMINAL COVER 1 CWH17006 ←
32 HOLDER-SENSOR-1 1 CWH32074 ←
33 HOLDER-SENSOR-2 4 CWH32075 ←
34 HOLDER-SENSOR-3 2 CWH32138 ←
35 HOLDER-COUPLING 1 CWH351018 ←
36 ANTI-VABRATION BUSHING 1 CWH4601085 ←
37 BELT-1 1 CWH4605004 ←
38 BELT-2 2 CWH4605010 ←
39 CAP-1 2 CWH4611109 ←
40 CAP-2 2 CWH4611110 ←
41 ANTI-VIBRATION BUSHING (COMP) 3 CWH501022 ←
42 BUSHING 1 CWH511039 ←
43 CAP-3 4 CWH521027 ←
44 CAP-4 4 CWH52273 ←
45 NUT (COMP) 3 CWH56000 ←
46 NUT (CROSS-FLOW FAN) 1 CWH56053 ←
47 DRAIN ELBOW 1 CWH5850080K ←
48 NUT (TARMINAL) 1 CWH7080300 ←
49 REACTOR 1 CWA421051 ←
50 COMPRESSOR 1 CWMB090001 ← ●
51 PARTICULAR PIECE 1 CWMD910006X ←
52 CABINET TOP PLATE 1 CWME03C0001 ←
53 CABINET SIDE PLATE 1 CWE041054 ←
54 CABINET FRONT PLATE 1 CWE06C1046 ←
55 SOUND PLOOF PLATE 1 CWH151032 ←
56 HOLDER SENSOR-4 1 CWMH320001 ←
57 TUBE ASSY-1 1 CWT022719 ←
58 TUBE ASSY COMPLETE (CAPILLARY) 1 CWT01C2528 ←
59 TUBE ASSY COMPLETE (EXPANSION VALVE) 1 CWT01C2499 ←
60 TUBE ASSY COMPLETE (EXPANSION VALVE) 1 CWT01C2500 ←
61 TUBE ASSY-2 1 CWT022734 ←
62 TUBE ASSY-3 1 CWT022510 ←
63 TUBE ASSY-4 1 CWT022511 ←
64 TUBE ASSY-5 1 CWT022515 ←
65 TUBE ASSY-6 1 CWT022516 ←
66 TUBE ASSY-7 1 CWT022647 ←

114
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Ref. No. Part Name & Description Q’ty Part No. Remarks
CU-2E15CBPG CU-2E18CBPG
67 FLARE NUT (1/4) 2 CWT25086 ←
68 FLARE NUT (3/8) 2 CWT25087 ←
69 MULTI BEND TUBE-1 1 CWT332957 ←
70 MULTI BEND TUBE-2 1 CWT332958 ←
71 MULTI BEND TUBE-3 1 CWT333298 ←
72 TUBE ASSY-8 1 CWT022720 ←
73 MULTI BEND TUBE-4 1 CWT022735 ←
74 ZNR 4 ERZVEAV511 ←
75 ZNR 1 ERZV10D182 ←
76 FUSE (250V, 3.15A) 2 XBA2C31TRO ←
77 FUSE (250V, 5A) 1 XBA2C50TRO ←
78 FUSE (20A) 1 K5D203BBA002 ←

(Note)
· “●” marked parts are recommended to be kept in stock.
· All parts are supplied from ACD, JAPAN (VENDER CODE: 00025800).

115
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.3. CU-3E23CBPG
16.3.1. Exploded View

Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.

116
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.3.2. Replacement Parts List

<Model: CU-3E23CBPG>
Ref. No. Part Name & Description Q’ty Part No. Remarks
1 SWING COMPRESSOR 1 CW1266081 ●
2 VIBRATION ISOLATOR 3 CW1289899
3 NUT WITH WASHER 3 CWH56062
4 TERMINAL COVER 1 CW1262647
5 RUBBER BUSH, LEAD WIRE 1 CWH51260
6 RETAINER, OVER-LOAD RELAY 1 CW380620
7 SOUND INSULATOR, COMP. (TOP) 1 CW1306910
9 SOUND INSULATOR, COMPRESSOR 1 CW1306934
10 SOUND INSULATOR, COMPRESSOR 1 CW1306941
12 CROSS-FIN CONDENSER ASS’Y 1 CW1305809
14 FOUR WAY VALVE 1 CW1305830 ●
16 DISCHARGE PIPE 1 CW1351802
17 MUFFLER (SUCTION LINE) 1 CW1170298
18 DISCHARGE PIPE 1 CW1351819
19 CONNECTING PIPE 1 CW1351826
20 CONNECTING PIPE 1 CW1351833
21 SOLENOID VALVE ASS’Y 1 CW1313545 ●
22 VIBRATION ABSORBER, REF. PIPING 1 CWH50085
23 RETAINER, VIBRATION ABSORBER 1 CW0219253
25 SET PLATE, STOP VALVE (1) 1 CW1364101
26 SET PLATE, STOP VALVE (2) 1 CW1306996
28 STOP VALVE ASS’Y (LIQUID LINE) 1 CW1305847 ●
30 BODY, MOTORIZED EXP. VALVE 3 CW1296385 ●
31 UNION JOINT 3 CW0603214
32 STRAINER (FOR REF.) 3 CW1318230
33 STRAINER (FOR REF.) 1 CW0085296
34 PUTTY 3 CW1307014
35 PUTTY 1 CW1313134
36 SOUND ABSORBING PUTTY 1 CW962621
37 FIXTURE, THERMISTOR 3 CW1303896
39 STOP VALVE ASS’Y (GAS LINE) 1 CW1305854 ●
41 UNION JOINT 3 CW257587
42 FITTING SPRING, THERMISTOR 4 CW380120
43 FIXTURE, UNION JOINT 1 CW1313141
44 ACCUMULATOR ASS’Y 1 CW1305885
45 CUSHION RUBBER, ACCUMULATOR 1 CW380116
46 PUTTY 1 CW0640338
47 FLARE NUT 3 CW0080347
48 BLIND CAP, FLARE NUT 3 CW1020937
49 FLARE NUT 3 CW1198474
50 BLIND CAP, FLARE NUT 3 CW1020920
51 CAP, STOP VALVE 1 CWH521017
52 CAP, STOP VALVE 1 CW0079936
53 FIXTURE, THERMISTOR 1 CW1107384
54 SUCTION LINE ASS’Y 1 CW1351927
55 PUTTY 1 CW1201589
56 SOUND ABSORBING PUTTY 1 CW1128538
57 SOUND ABSORBING PUTTY 1 CW0141521
58 FAN BLADE 1 CW1183821
59 LOCK NUT, FAN BLADE 1 CW847002
60 AIR DISCHARGE GRILLE 1 CW1314308
61 GUARD NET 1 CW1182385
63 SWITCH BOX 1 CW1307069
64 CUSHION RUBBER 1 CW1307076
65 PRINTED CIRCUIT ASS’Y 1 CW1364118 ●
66 FUSE 1 CW0509002
67 VARISTOR 1 CW0608055 ●
68 WIRE HARNESS ASS’Y 1 CW1307083
69 HEAT SINK 1 CW1289914 ●
70 TERMINAL BLOCK 1 CW1364125 ●
71 PRINTED CIRCUIT ASS’Y (INVERTER) 1 CW1290402 ●
72 THERMISTOR 1 CW1302622 ●
73 RECTIFING STACK 1 CW628953
74 POWER TRANSISTOR MODULE 1 CW1289921 ●
75 THERMISTOR ASS’Y 1 CW1302639 ●
79 REACTOR 1 CW1305955
80 WIRE HARNESS ASS’Y 1 CW1305962
81 COIL, SOLENOID VALVE ASS’Y 1 CW1364132 ●
82 COIL, SOLENOID VALVE 1 CW1296378 ●
84 DC FAN MOTOR 1 CW1307160 ●

117
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Ref. No. Part Name & Description Q’ty Part No. Remarks
85 MOTORIZED EXP. V COIL, ASS’Y 1 CW1313350 ●
87 COIL, MOTORIZED EXP. VALVE 1 CW1305234
88 COIL, MOTORIZED EXP. VALVE 1 CW1305241
89 COIL, MOTORIZED EXP. VALVE 1 CW1305210
90 THERMISTOR ASS’Y (LIQUID LINE) 1 CW1309438 ●
91 THERMISTOR 3 CW1307223
92 THERMISTOR ASS’Y (GAS LINE) 1 CW1309522 ●
93 THERMISTOR 3 CW0115128
94 DRIP PROOF COVER 1 CW1307247
95 DRIP PROOF COVER 1 CW1307254
96 WIRE HARNESS ASS’Y 1 CW1307261
97 CLIP 1 CW1364156
98 OVER-LOAD RELAY 1 CW622418 ●
99 BOTTOM FRAME ASS’Y 1 CW1307278
100 SIDE PLATE (RIGHT) 1 CW1307285
101 SIDE PLATE (LEFT) 1 CW1182114
102 FRONT PLATE 1 CW1195064
103 PARTITION PLATE ASS’Y 1 CW1307292
104 MOTOR BASE 1 CW1204153
105 COVER, STOP VALVE 1 CW1313196
106 HANDLE (LEFT) 1 CW1182361
107 SOUND ABSORBING PUTTY 1 CW1307317
108 SCREW WITH SPACER 4 CW1315363
109 TRUSS HEAD TAPPING SCREW 35 CW0082033
110 TOP PLATE 1 CW1182347
112 DRAIN JOINT 1 CW0589565
121 GROUNDING TERMINAL 2 CW1137835
123 OPERATION MANUAL 1 CWF563678
123-1 I/M (INDOOR) 1 CWF612315
124 I/M (ENGLISH, GERMANY, FRENCH, DUTCH) 1 CW1364202
132 I/M (SPANISH, ITALIAN, GREEK, PORTUGUESE) 1 CW1364271
133 I/M (RUSSIAN) 1 CW1364288

(Note)
· “●” marked parts are recommended to be kept in stock.
· All parts are supplied from ACD, JAPAN (VENDER CODE: 00025800).

118
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.4. CU-4E27CBPG
16.4.1. Exploded View

Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.

119
CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

16.4.2. Replacement Parts List

<Model: CU-4E27CBPG>
Ref. No. Part Name & Description Q’ty Part No. Remarks
1 SWING COMPRESSOR 1 CW1266081 ●
2 SPRING 3 CW390208
3 NUT WITH WASHER 3 CWH56062
4 TERMINAL COVER 1 CW1262647
5 GUARD BUSH, POWER CORD 1 CW354120
6 RETAINER, OVER-LOAD RELAY 1 CW380620
7 SPRING HOLDER (1) 3 CW0960397
8 SPRING HOLDER (2) 3 CW390215
10 OVER-LOAD RELAY 1 CW1313747 ●
11 SOUND INSULATOR, COMP. (TOP) 1 CW1313754
12 SOUND INSULATOR, COMPRESSOR 1 CW1313761
13 SOUND INSULATOR, COMPRESSOR 1 CW1313778
14 CROSS-FIN CONDENSER ASS’Y 1 CW1313785
15 PUTTY 1 CW0640338
17 FOUR WAY VALVE 1 CW1305830 ●
18 DISCHARGE PIPE ASS’Y 1 CW1354399
19 CONNECTING PIPE 1 CW1354407
20 CONNECTING PIPE 1 CW1354414
21 SOLENOID VALVE ASS’Y 1 CW1313792 ●
22 CONNECTING PIPE 1 CW1354421
23 SUCTION LINE ASS’Y 1 CW1354438
24 PUTTY 1 CW1201589
26 SET PLATE, STOP VALVE 1 CW1313800
27 LIQUID RECEIVER 1 CW1313817
28 SET PLATE, STOP VALVE 1 CW1313824
30 STOP VALVE ASS’Y (LIQUID LINE) 1 CW1313831 ●
31 BRANCH PIPE 1 CW1354452
32 BODY, MOTORIZED EXP. VALVE 4 CW1318533 ●
33 UNION JOINT 4 CW0603214
34 STRAINER (FOR REF.) 4 CW1318230
35 STRAINER (FOR REF.) 1 CW0085296
36 PUTTY 4 CW1307014
37 SOUND ABSORBING PUTTY 1 CW1265374
39 STOP VALVE ASS’Y (GAS LINE) 1 CW1314252 ●
40 BRANCH PIPE 1 CW1354469
41 CONNECTING PIPE 4 CW1354476
42 UNION JOINT 4 CW257587
43 CONNECTING PIPE 1 CW1354483
44 FIXTURE UNION JOINT 4 CW1314269
45 FLARE NUT 3 CW0080347
46 BLIND CAP, FLARE NUT 3 CW1020937
47 CUSHION RUBBER 1 CW1314276
48 ACCUMULATOR ASS’Y 1 CW1314283
49 FLARE NUT 1 CW0080347
50 BLIND CAP, FLARE NUT 1 CW1020937
51 FLARE NUT 4 CW1198474
52 BLIND CAP, FLARE NUT 4 CW1020920
53 CAP, STOP VALVE 1 CW0454328
54 CAP, STOP VALVE 1 CW0079936
55 SOUND ABSORBING PUTTY 1 CW1128538
56 SOUND ABSORBING PUTTY 1 CW1040739
57 PUTTY 1 CW1314290
58 FITTING SPRING, THERMISTOR 8 CW380120
59 FIXTURE, THERMISTOR 4 CW1107384
60 FAN BLADE 1 CW1264302
61 LOCK NUT, FAN 1 CW847003
62 AIR DISCHARGE GRILLE 1 CW1314308
63 BELL MOUTH 1 CW1278882
64 GUARD NET 1 CW1314315
65 SWITCH BOX 1 CW1314322
66 CUSHION RUBBER 1 CW1307076
67 PRINTED CIRCUIT ASS’Y 1 CW1364295 ●
68 FUSE 1 CW0509002
69 VARISTOR 1 CW0608055 ●
70 WIRE HARNESS ASS’Y 1 CW1307083
71 HEAT SINK 1 CW1314339 ●
72 TERMINAL BLOCK 1 CW1364303 ●
73 PRINTED CIRCUIT ASS’Y (INVERTER) 1 CW1290402 ●
74 THERMISTOR 1 CW1302622 ●
75 RECTIFING STACK 1 CW628953

120
 CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG

Ref. No. Part Name & Description Q’ty Part No. Remarks
76 POWER TRANSISTOR MODULE 1 CW1289921 ●
77 THERMISTOR ASS’Y 1 CW1296633 ●
81 COIL, SOLENOID VALVE ASS’Y 1 CW1364310 ●
82 COIL, SOLENOID VALVE 1 CW1296378 ●
83 COIL, FOUR WAY VALVE 1 CW1176304
85 REACTOR 1 CW1305955
86 WIRE HARNESS ASS’Y 1 CW1314377
87 DRIP PROOF COVER 1 CW1307247
88 DC FAN MOTOR 1 CW1314384 ●
89 MOTORIZED EXP. V COIL ASS’Y 1 CW1314391 ●
90 COIL, MOTORIZED EXP. VALVE 1 CW1296392
91 COIL, MOTORIZED EXP. VALVE 1 CW1296400
92 COIL, MOTORIZED EXP. VALVE 1 CW1296417
93 COIL, MOTORIZED EXP. VALVE 1 CW1296424
94 THERMISTOR ASS’Y (LIQUID LINE) 1 CW1296671 ●
96 THERMISTOR ASS’Y (GAS LINE) 1 CW1296710 ●
98 WIRE HARNESS ASS’Y 1 CW1364334
99 DRIP PROOF COVER 1 CW1307835
101 BYPASS PROTECTOR 1 CW1314409
102 CLIP 1 CW1364156
103 BOTTOM FRAME ASS’Y 1 CW1279359
104 SIDE PLATE (RIGHT) 1 CW1314423
105 SIDE PLATE (LEFT) 1 CW1279335
106 FRONT PLATE (1) 1 CW1279272
107 PARTITION PLATE 1 CW1314430
108 MOTOR BASE (1) 1 CW1279373
109 MOTOR BASE 1 CW1314447
110 HANDLE 1 CW353605
111 HANDLE 1 CW1314454
112 SOUND INSULATOR 1 CW1314461
113 FRONT PLATE 1 CW1314478
114 PARTITION PLATE 1 CW1314485
115 REAR PLATE 1 CW1314492
116 ANCHOR PLATE 2 CW0423920
117 TOP PLATE 1 CW1278558
124 OPERATION MANUAL 1 CWF563678
124-1 I/M (INDOOR) 1 CWF612315
129 DRAIN SOCKET 1 CW537651
130 CAP DRAIN SOCKET 2 CW1314593
131 DRAIN TERMINAL 3 CW1314601
132 I/M (ENGLISH, GERMANY, FRENCH, DUTCH) 1 CW1364202
132-1 I/M (SPANISH, ITALIAN, GREEK, PORTUGUESE) 1 CW1364271
132-2 I/M (RUSSIAN) 1 CW1364288

(Note)
· “●” marked parts are recommended to be kept in stock.
· All parts are supplied from ACD, JAPAN (VENDER CODE: 00025800).

121 Printed in Japan