Service Manual

SUPER DC INVERTER LCAC SERIES

/Energy Related Products/
CASSETTE
FSKIF-120AE2-EU
FSKIF-181AE2
FSKIF-241AE2
FSKIF-300AE2
FSKIF-361AE2

Duct
FSLIF-181AE2
FSLIF-241AE2
FSLIF-300AE2
FSLIF-361AE2

ceiling /floor
FSPIF-181AE2
FSPIF-241AE2
FSPIF-300AE2
FSPIF-361AE2

Console
FSFIF-120AE2

NOTE:
Before servicing the unit, please read this at first.
Always contact with your service center if meet problem.

FI_SM_ FSKIF_FSLIF_FSPIF_FSFIF--AE2_2014
Part 1 General Information .................................................................................................... 1

Part 2 Indoor Units ................................................................................................................. 5

Part 3 Outdoor Units............................................................................................................. 63

Part 4 Installation.................................................................................................................. 72

Part 5 Electrical Control System ....................................................................................... 103

※The specifications, designs, and information in this book are subject to change without notice for
product improvement.
 General Information

Part 1
General Information
1. Model Lists .................................................................................................. 2
2. External Appearance .................................................................................. 3
2.1 Indoor Units............................................................................................................ 3
2.2 Outdoor Units......................................................................................................... 3
3. Features ....................................................................................................... 4

General Information 1
Model Lists

1. Model Lists
1.1 Indoor Units
R410A (capacity multiplied by 1000Btu/h)
Type Function 12 18 24 30 36
Super slim cassette Cooling and heating ● ● ● ●
Duct Cooling and heating ● ● ● ●
Ceiling-floor Cooling and heating ● ● ● ●
Four-way cassette(compact) Cooling and heating ●
Console Cooling and heating ●

1.2 Outdoor Units

Universal Outdoor unit Model Compressor type Compressor Brand Matched indoor units

FSKIF-120AE2-EU
FSOIF-120AE2 Rotary GMCC
FSFIF-120AE2

FSKIF-181AE2
FSOIF-181AE2 Rotary GMCC FSLIF-181AE2
FSPIF-181AE2

FSKIF-241AE2
FSOIF-241AE2 Rotary GMCC FSLIF-241AE2
FSPIF-241AE2

FSKIF-300AE2
FSOIF-300AE2 Rotary GMCC FSLIF-300AE2
FSPIF-300AE2

FSKIF-361AE2
FSOIF-361AE2-3F Rotary Mitsubishi FSLIF-361AE2
FSPIF-361AE2

2 General Information
 External Appearance

2. External Appearance
2.1 Indoor Units

Super slim cassette Duct

Ceiling-Floor Compact Four-way cassette

Console

2.2 Outdoor Units

Single fan outdoor unit

General Information 3
Features

3. Features
4.1. To meet Europe A level, actual EER/COP of new product with BLDC motors of indoor & outdoor unit and
DC compressor will be higher than 3.4.
4.2. Low ambient kit is standard for outdoor units
4.3. Network control function is standard for the indoor units.
4.4. Standard auto restart function and follow me function.
4.5. Slim cassette with standard remote controller, wire controller for optional. Duct with standard wired
controller, remote controller for optional.
4.6. Standard anti-cold air function.
4.7. Standard auto defrosting function.
4.8. Standard self-diagnose function.
4.9. Standard timer function and sleep mode function controlled by controller.

4 General Information
 Indoor Units

Part 2
Indoor Units

Super Slim Cassette Type ................................................. 6

Duct Type ......................................................................... 19

Ceiling & Floor Type ........................................................ 33

New Four-way Cassette Type (Compact) ........................ 42

Console Type ................................................................... 51

Indoor Units 5
Indoor Units

Super Slim Cassette Type

1. Features ................................................................................ 7

2. Dimensions ......................................................................... 11

3. Service Space ..................................................................... 12

4. Wiring Diagrams ................................................................ 13

5. Electric Characteristics ..................................................... 14

6. Sound Levels...................................................................... 15

7. Accessories ........................................................................ 16

8. The Specification of Power ............................................... 17

9. Field Wiring ........................................................................ 18

6 Indoor Units
 Features

1. Features
1.1 Overview
 Compact design, super slim body size, less space requiring in installation
 Each louver can be separately controlled, more comfort air blowing is possible.
 Auto-lifting panel design, more convenient to clean and maintain the filter. (optional)

Old Cassette New Slim Cassette

18K-24K 840*230*840 840*205*840
30K 840*300*840 840*205*840
36K 840*300*840 840*245*840

1.2 Fresh air intake function

 Fresh air fulfills air quality more healthy and comfortable.
 Ventilation motor is optional to increase the effect of fresh air.

Indoor Units 7
Features

New air-intake

1.3 Optional ionizer generator

 Ionizer generator is optional to get refreshing air to your room.

Ionizer generator Ventilation m otor

connector connector
 Ionizer can be switched on or off by remote controller.
When pressing the Clean Air button on the remote controller, Ionizer will work and the indicator light on
display board will shine.

8 Indoor Units
 Features

1.4 External air duct design

 Reserve external air duct, more flexible for the air supply.

1.5 Built-in draining pump

 Due to the improvement of structure, more convenient to repair or replace the draining pump.

Draining Pump

 Built-in draining pump to make sure condensed water drain out reliably.

Indoor Units 9
Features

1.6 Terminals for alarm lamp and long-distance on-off controller(Window contact)
connection are standard
 Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human
control.

Alarm lamp
Long-distance on-off controller

1.7 Optional wired controller

1.8 Twins Combination(18k-30k)

 The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The
indoor units can be combined in any of the different available ratings.

10 Indoor Units
 Dimensions

2. Dimensions

Model A H
FSKIF-181AE2 205 >235
FSKIF-241AE2 245 >275
FSKIF-300AE2 245 >275
FSKIF-361AE2 245 >275

Indoor Units 11
Service Space

3. Service Space

>1000mm
>1000m m

>1000m m

>1000mm

12 Indoor Units
 Wiring Diagrams

4. Wiring Diagrams
FSKIF-181AE2 FSKIF-241AE2 FSKIF-300AE2 FSKIF-361AE2

Indoor Units 13
Electric Characteristics

5. Electric Characteristics
Power
Indoor Unit
Model Supply
Hz Voltage Min Max MFA
FSKIF-181AE2 50 220-240 198 254 10
FSKIF-241AE2 50 220-240 198 254 10
FSKIF-300AE2 50 220-240 198 254 10
FSKIF-361AE2 50 220-240 198 254 10
Notes:
MFA: Max. Fuse Amps. (A)

14 Indoor Units
 Sound Levels

6. Sound Levels

1.4m

Microphone

Noise level dB(A)

Model Noise Power dB(A)
H M L
FSKIF-181AE2 59 49 44 39
FSKIF-241AE2 62 50 47 42
FSKIF-300AE2 62 52 49 46
FSKIF-361AE2 65 52 49 46

Indoor Units 15
Accessories

7. Accessories
Name Shape Quantity

Installation Fittings Installation paper board 1

Tubing & Fittings Soundproof / insulation sheath 1

Out-let pipe sheath 1

Out-let pipe clasp 1

Drainpipe Fittings
Drain joint 1

Seal ring 1

Remote controller & Its Frame 1

Remote controller & Its

Frame(The product you Remote controller holder 1
have might not be
provided the following
Mounting screw(ST2.9×10-C-H) 2
accessories)
Remote controller manual 1

Alkaline dry batteries (AM4) 2

Owner's manual 1
Others
Installation manual 1

Installation accessory Expansible hook 4

(The product you have
might not be provided the Installation hook 4
following accessories
Orifice 1

16 Indoor Units
 The Specification of Power

8. The Specification of Power

Model 18000-24000Btu/h 30000 Btu/h 36000 Btu/h
Phase 1-phase 1-phase 1-phase
Frequency and
220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz
INDOOR UNIT Voltage
POWER POWER WIRING
3×1.5 3×1.5 3×1.5
(mm2)
Fuse (A) C10 C10 C10
Phase 1-phase 1-phase 3-phase
Frequency and
220-240V, 50Hz 220-240V, 50Hz 380-420V, 50Hz
OUTDOOR UNIT Voltage
POWER POWER WIRING
3×2.5 3×2.5 5×2.5
(mm2)
Fuse (A) C16 C20 3xC16
Indoor/Outdoor Connecting Wiring
2 3×0.5 shielded 3×0.5 shielded 3×0.5 shielded
(Weak Electric Signal) (mm )

Indoor Units 17
Field Wiring

9. Field Wiring

18 Indoor Units
 Duct Type

Duct Type

1. Features .............................................................................. 20

2. Dimensions ......................................................................... 23

3. Service Space ..................................................................... 24

4. Wiring Diagrams ................................................................ 25

5. Static Pressure ................................................................... 27

6. Electric Characteristics ..................................................... 28

7. Sound Levels...................................................................... 29

8. Accessories ........................................................................ 30

9. The Specification of Power ............................................... 31

10. Field Wiring ...................................................................... 32

Indoor Units 19
Features

1. Features
1.1 Installation accessories: (Optional)
 Front Board, Filter, Panel for easy installation

Front Board

Canvas Air Passage Filter Panel

1.2 Easy Installation: Two air inlet styles (Bottom side or Rear side)
 Air inlet from rear is standard for all capacity; air inlet from bottom is optional.
 The size of air inlet frame from rear and bottom is same, it’s very easy to move the cover from bottom to
rear side, or from rear to the bottom, in order to matching the installation condition.

Air intake from rear (Standard) Air intake from bottom (Optional)

1.3 Fresh air intake function(Optional for 18~60k)

 Install one duct from the reserved fresh-air intake to outdoor.
Continually inhale the fresh air to improve the quality of the indoor air, fulfills air quality more healthy and
comfortable.

1.4 Easy maintenance

 Clean the filter (Optional, standard product without filter)
It is easy to draw out the filter from the indoor unit for cleaning, even the filter is installed in rear side or
bottom side.

20 Indoor Units
 Features

 Replace the motor or centrifugal fan

Remove the ventilated panel firstly. Remove a half of blower housing and take out the motor with
centrifugal fan. Directly remove two bolts, and then replace the motor or centrifugal fan easily.

Motor

Blower Housing

Ventilated Panel

1.5 Reserved remote on-off (Window contact)and central control ports

 Reserved remote on-off ports and central control ports, can connect the cable of an on-off controller or a
central controller to realize remote on-off control function or group control function.

Remote on-off ports Central control ports

1.6 Built-in drain pump (Optional):
 Built-in drain pump can lift the water to 750mm upmost. It’s convenient to install drainage piping under
most space condition.

Indoor Units 21
Features

750mm upmost
1.7 Built-in display board
 The standard indoor unit can be controlled by wired controller.
 There is a display board with a receiver in the E-box. Move out the display, and fix it in other place, even
in the distance of 10m. The unit will realized remoter control.
 The wired controller and the display board can display the error code or production code when the chips
detect some failure.

Wired Controller (Standard) Remote Controller (Optional)

Display

1.8 Twins Combination

 The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The
indoor units can be combined in any of the different available ratings.

22 Indoor Units
 Dimensions

2. Dimensions
G
H

B
D
E F
A C

Size of outline
Capacity Outline dimension(mm) Air outlet opening size Air return opening size dimension mounted
(KBtu) plug
A B C D E F G H I J K L M
18/24 920 270 635 570 65 713 35 179 815 260 20 960 350
30 1140 270 775 710 65 933 35 179 1035 260 20 1180 490
36 1200 300 865 800 80 968 40 204 1094 288 45 1240 500

Indoor Units 23
Service Space

3. Service Space
Ensure enough space required for installation and maintenance.

All the indoor units reserve the hole to joint the fresh air pipe. The hole size as following:

24 Indoor Units
 Wiring Diagrams

4. Wiring Diagrams
FSLIF-181AE2 FSLIF-241AE2 FSLIF-300AE2 FSLIF-361AE2

Indoor Units 25
Wiring Diagrams

26 Indoor Units
 Static Pressure

5. Static Pressure
18,000Btu/h 24,000Btu/h

Pa
Pa

90
90

80
80

External static pressure (Pa)

External static pressure (Pa)

Super high speed 70

70
Super high speed
60 60
High speed

50 50
High speed

40 40
Mid speed Mid speed

30 30
Low speed
Low speed
20 20

10 10

200 300 400 500 600 700 800 900 1000 1100 1200 700 800 900 1000 1100 1200 1300 1400 1500
Air volume(m3/h) Air volume(m3/h)

30,000Btu/h 36,000Btu/h
36K
Pa

90

80
External static pressure (Pa)

70
Super high speed

60
High speed

50

Mid speed
40

Low speed
30

20

10

1100 1200 1400 1600 1800 2000 2200 2400

Air volume(m3/h)

Indoor Units 27
Electric Characteristics

6. Electric Characteristics
Indoor Unit Power Supply
Model
Hz Voltage Min. Max. MFA
FSLIF-181AE2 50 220-240 198 254 10
FSLIF-241AE2 50 220-240 198 254 10
FSLIF-300AE2 50 220-240 198 254 10
FSLIF-361AE2 50 220-240 198 254 10
Note:
MFA: Max. Fuse Amps. (A)

28 Indoor Units
 Sound Levels

7. Sound Levels

Concealed Duct Type

Discharge Suction

Duct Duct

1.4m

Microphone

Sound Power Noise level dB(A)

Model
dB(A) H M L
FSLIF-181AE2 59 45 42 40
FSLIF-241AE2 63 46 42 39
FSLIF-300AE2 65 50 46 41
FSLIF-361AE2 64 43 41 40

Indoor Units 29
Accessories

8. Accessories
Name Shape Quantity

Soundproof / insulation sheath 2

Tubing & Fittings Binding tape 1

Seal sponge 1

Drain joint 1
Drainpipe Fittings
(for cooling & heating)
Seal ring 1

Wired controller & Its Frame Wired controller 1

，
Owner s manual 1
Others
Installation manual 1

Magnetic ring (twist the electric wires L

EMS & It’s fitting 1
and N around it to five circles)

30 Indoor Units
 The Specification of Power

9. The Specification of Power

Model 18000-24000Btu/h 30000 Btu/h 36000 Btu/h

Phase 1-phase 1-phase 1-phase
Frequency and
220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz
INDOOR UNIT Voltage
POWER POWER WIRING
3×1.5 3×1.5 3×1.5
(mm2)
Fuse (A) C10 C10 C10
Phase 1-phase 1-phase 3-phase
Frequency and
220-240V, 50Hz 220-240V, 50Hz 380-420V, 50Hz
OUTDOOR UNIT Voltage
POWER POWER WIRING
3×2.5 3×2.5 5×2.5
(mm2)
Fuse (A) C16 C20 3xC16
Indoor/Outdoor Connecting Wiring
2 3×0.5 shielded 3×0.5 shielded 3×0.5 shielded
(Weak Electric Signal) (mm )

Indoor Units 31
Field Wiring

10. Field Wiring

FSLIF-181AE2 FSLIF-241AE2 FSLIF-300AE2 FSLIF-361AE2

32 Indoor Units
Ceiling & Floor Type

Ceiling & Floor Type

1. Features ................................................................... 34

2. Dimensions .............................................................. 35

3. Service Space........................................................... 36

4. Wiring Diagrams ...................................................... 37

5. Electric Characteristics ........................................... 39

6. Sound Levels ........................................................... 39

7. Accessories.............................................................. 40

8. The Specification of Power...................................... 40

9. Field Wiring .............................................................. 41

Indoor Units 33
Features

1. Features
1.1. New design, more modern and elegant appearance.

1.2. Convenient installation

--The ceiling type can be easily installed into a corner of the ceiling even if the ceiling is very narrow
--It is especially useful when installation of an air conditioner in the center of the ceiling is impossible
due to a structure such as one lighting.

1.3. Two direction auto swing (vertical & horizontal) and wide angle air flow,
--Air flow directional control minimizes the air resistance and produces wilder air flow to vertical
direction.
--The range of horizontal air discharge is widened which secures wider air flow distribution to provide
more comfortable air circulation no matter where the unit is set up

1.4. Three level fan speed, more humanism design, meets different air-supply requirement.

1.5. New foam drain pan with plastic-spraying inner surface

1.6. Easy operation.

1.7. Remote control and optional wired control method.

34 Indoor Units
 Dimensions

2. Dimensions

Capacity (Btu/h) A B C D E
18K, 24K 1068 675 235 983 220
30K, 36K 1285 675 235 1200 220

Indoor Units 35
Service Space

3. Service Space

36 Indoor Units
 Wiring Diagrams

4. Wiring Diagrams
FSPIF-181AE2 FSPIF-241AE2 FSPIF-300AE2

FSPIF-361AE2

Indoor Units 37
Wiring Diagrams

38 Indoor Units
 Electric Characteristics

5. Electric Characteristics
Indoor Units Power Supply
Model
Hz Voltage Min. Max. MFA
FSPIF-181AE2 50 220-240 198 254 10
FSPIF-241AE2 50 220-240 198 254 10
FSPIF-300AE2 50 220-240 198 254 10
FSPIF-361AE2 50 220-240 198 254 10
Note:
MFA: Max. Fuse Amps. (A)

6. Sound Levels

Microphone
1m

1m 1.5m
Air outlet side 1m

Microphone

Ceiling Floor

Sound Power Noise level dB(A)

Model
dB (A) H M L
FSPIF-181AE2 60 46 43 40
FSPIF-241AE2 63 55 53 49
FSPIF-300AE2 64 55 50 46
FSPIF-361AE2 65 55 50 45

Indoor Units 39
Accessories

7. Accessories
Name Shape Quantity

1. Remote controller 1

Remote controller & Its

holder(The product you
have might not be 2. Remote controller holder 1
provided the following
accessories) 3. Mounting screw (ST2.9×10-C-H) 2

4. Alkaline dry batteries (AM4) 2

5. Owner's manual 1
Others 6. Installation manual 1
7. Remote controller manual 1

8. The Specification of Power

Model 18000-24000Btu/h 30000 Btu/h 36000 Btu/h
Phase 1-phase 1-phase 1-phase
Frequency and
220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz
INDOOR UNIT Voltage
POWER POWER WIRING
2 3×1.5 3×1.5 3×1.5
(mm )
Fuse (A) C10 C10 C10
Phase 1-phase 1-phase 3-phase
Frequency and
220-240V, 50Hz 220-240V, 50Hz 380-420V, 50Hz
OUTDOOR UNIT Voltage
POWER POWER WIRING
3×2.5 3×2.5 5×2.5
(mm2)
Fuse (A) C16 C20 3xC16
Indoor/Outdoor Connecting Wiring
3×0.5 shielded 3×0.5 shielded 3×0.5 shielded
(Weak Electric Signal) (mm2)

40 Indoor Units
 Field Wiring

9. Field Wiring

Indoor Units 41
Field Wiring

New Four-way Cassette Type

(Compact)
1. Features ............................................................................................ 43

2. Dimensions ....................................................................................... 44

3. Service Space ................................................................................... 45

4. Wiring Diagrams ............................................................................... 46

5. Air Velocity and Temperature Distributions(Reference Data) ......... 47

6. Electric Characteristics .................................................................... 48

7. Sound Levels .................................................................................... 48

8. Accessories ...................................................................................... 49

9. The Specification of Power .............................................................. 49

10. Field Wiring ..................................................................................... 50

42 Indoor Units
 Features

1. Features
1.1 New panel
 360°surrounding air outlet design, affords comfortable feeling

1.2 Compact design

 The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for
installation and will not damage the decoration. The panel size is 647×50×647mm.
 The hooks are designed in the four corners of the body, which can save installation space.

1.3 Electric control box built-in design

 The E-box is simply and safely built inside the indoor unit. It’s convenient for installation and
maintenance. Can check the control part easily, you only need to open the air return grille.

1.4 Air passage function

 Reserves the space for air outlet from the side of indoor unit; It’s availed to connect air duct
from the two sides to the nearby small rooms.

Indoor Units 43
Dimensions

2. Dimensions

44 Indoor Units
 Service Space

3. Service Space

Indoor Units 45
Wiring Diagrams

4. Wiring Diagrams
FSKIF-120AE2-EU

46 Indoor Units
 Air Velocity and Temperature Distributions(Reference Data)

5. Air Velocity and Temperature Distributions(Reference Data)

Airflow velocity

Temperature

Indoor Units 47
Electric Characteristics

6. Electric Characteristics
Indoor Units Power Supply
Model
Hz Voltage Min. Max. MFA
FSKIF-120AE2-EU 50 220-240 198 254 20
Notes:
MFA: Max. Fuse Amps. (A)

7. Sound Levels

1.4m

Microphone

Noise level dB(A)

Model Noise Power dB(A)
H M L
FSKIF-120AE2-EU 54 47 45 41

48 Indoor Units
 Accessories

8. Accessories
Name Shape Quantity

Installation Fittings Installation paper board 1

Tubing & Fittings Soundproof / insulation sheath 1

Out-let pipe sheath 1

Out-let pipe clasp 1

Drainpipe Fittings
Drain joint 1

Seal ring 1

Remote controller & Its Frame 1

Remote controller & Its

Frame(The product you Remote controller holder 1
have might not be
provided the following
Mounting screw(ST2.9×10-C-H) 2
accessories)
Remote controller manual 1

Alkaline dry batteries (AM4) 2

Owner's manual 1
Others
Installation manual 1

Installation accessory Expansible hook 4

(The product you have
might not be provided the Installation hook 4
following accessories
Orifice 1

9. The Specification of Power

MODEL 12000 Btu/h

Phase 1-phase
Power
Frequency and Voltage 220-240V, 50Hz

Fuse (A) C16

Indoor Unit Power Wiring (mm2)

Ground Wiring 2.5

Outdoor Unit Power

3×2.5
Indoor/Outdoor Connecting Wiring Wiring
(mm2)
Strong Electric Signal 4×1.5

Weak Electric Signal

Indoor Units 49
Field Wiring

10. Field Wiring

FSKIF-120AE2-EU

50 Indoor Units
 Console Type

Console Type
1. Features ............................................................................................ 53

2. Dimensions ....................................................................................... 55

3. Service Space ................................................................................... 56

4. Wiring Diagrams ............................................................................... 57

5. Air Velocity and Temperature Distributions(Reference Data) ......... 58

6. Electric Characteristics .................................................................... 59

7. Sound Levels .................................................................................... 60

8. Accessories ...................................................................................... 61

9. The Specification of Power .............................................................. 61

10. Field Wiring ..................................................................................... 62

Console Type 51
 Features

1. Features
1.1. Modern and elegant appearance
 The simple and stylish designs can nicely harmonies with your living space.

1.2. Two air-outlet ways

Cooling mode

Quick Cooling To maintain room temp

 Air outlet from top and bottom to make quick cooling ------When the A/C is just switched on, or room
temp. is still high, cold air will be blown out from top and bottom air outlet to cool down the room quickly
 Air outlet from top to maintain room temp. ----When the room has been cooled down, or the A/C has
been opened over 1 hour, cold air only from the top outlet to keep constant room temp
Heating mode
 Anti-cold air ------When the AC is just turn on, temperature of evaporator is very low, in this case, in
order to prevent cold air direct blowing, only the upper louver is opened in a high position, the lower
louver closed.

Console Type 53
Console Type
1.3. Four air inlets

1.4. Low noise

 DC indoor fan motor, which has five speeds.
 Low noise and energy saving.

 Advanced centrifugal fan technology makes a fast airflow and reduces the indoor noise lower to 28dB.

1.5. Active carbon filter is standard

54 Console Type
2. Dimensions
FSFIF-120AE2

Console Type 55
3. Service Space

56 Console Type
4. Wiring Diagrams
FSFIF-120AE2

Console Type 57
5. Air Velocity and Temperature Distributions(Reference Data)
Discharge angle 60

Airflow velocity

Temperature

58 Console Type
6. Electric Characteristics
Indoor Units Power Supply
Model
Hz Voltage Min. Max. MFA
FSFIF-120AE2 50 220-240 198 254 16

Console Type 59
7. Sound Levels

Microphone
1m

1.5m

Noise Power Noise level dB(A)

Model
dB(A) Higher H M L
FSFIF-120AE2 57 47 44 40 37

60 Console Type
8. Accessories
Name Shape Quantity

Installation fittings Hook 2

Remote controller 1

Remote controller & Its Frame Frame 1

Mounting screw(ST2.9×10-C-H) 2

Alkaline dry batteries (AM4) 2

Installation manual / 1
Others
Owner's manual / 1

9. The Specification of Power

MODEL 12000 Btu/h

Phase 1-phase
Power
Frequency and Voltage 220-240V, 50Hz

Circuit Breaker/ Fuse (A) C16

Indoor Unit Power Wiring (mm2)

Ground Wiring 2.5

Outdoor Unit Power

3×2.5
Indoor/Outdoor Connecting Wiring Wiring
(mm2)
Strong Electric Signal 4×1.5

Weak Electric Signal

Console Type 61
10. Field Wiring
FSFIF-120AE2

62
 Outdoor Units

Part 3
Outdoor Units
1. Dimensions .................................................................................................... 64

2. Service Space ................................................................................................ 65

3. Piping Diagrams ............................................................................................ 66

4. Wiring Diagrams ........................................................................................... 67

5. Electric Characteristics ................................................................................ 69

6. Operation Limits ........................................................................................... 70

7. Sound Levels ................................................................................................. 71

Outdoor Units 63
Dimensions

1. Dimensions

Unit：mm
Model
A B C D E F H
FSOIF-120AE2 760 530 290 315 270 285 590
FSOIF-181AE2 845 560 335 360 312 320 700
FSOIF-241AE2 900 590 333 355 302 315 860
FSOIF-300AE2 900 590 333 355 302 315 860
FSOIF-361AE2-3F 990 624 366 396 340 345 965

64 Outdoor Units
 Service Space

2. Service Space

(Wall or obstacle)

Air inlet More than 30cm More than 60cm

More than 30cm
Maintain channel
Air inlet
More than 60cm

Air outlet
More than 200cm

Outdoor Units 65
Piping Diagrams

3. Piping Diagrams
FSOIF-120AE2 FSOIF-181AE2 FSOIF-241AE2 FSOIF-300AE2

INDOOR OUTDOOR

Electronic
LIQUID SIDE CAPILIARY TUBE expansion valve

2-WAY VALVE T3 Condenser

temp. sensor

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
T2 Evaporator T1 Room temp. T4 Ambient EXCHANGE
temp. sensor sensor temp. sensor (CONDENSER)
middle

T2B Evaporator
temp. sensor
outlet
GAS SIDE
4-WAY VALVE

3-WAY VALVE Accumulator High pressure

switch
T5 Discharge
Low pressure temp. sensor
switch COOLING
Compressor
HEATING

FSOIF-361AE2-3F
INDOOR OUTDOOR

Electronic
LIQUID SIDE CAPILIARY TUBE expansion valve

2-WAY VALVE T3 Condenser

temp. sensor

HEAT
EXCHANGE
(EVAPORATOR) HEAT
T1 Room temp. T4 Ambient EXCHANGE
T2 Evaporator temp. sensor
sensor (CONDENSER)
temp. sensor
middle

T2B Evaporator
temp. sensor
outlet
GAS SIDE
4-WAY VALVE

3-WAY VALVE Accumulator High pressure switch

Compressor T5 Discharge temp. sensor
Oil separator
Low pressure
switch COOLING

Oil return Capillary HEATING

66 Outdoor Units
 Wiring Diagrams

4. Wiring Diagrams
FSOIF-120AE2

Outdoor Units 67
Wiring Diagrams

FSOIF-181AE2 FSOIF-241AE2 FSOIF-300AE2

FSOIF-361AE2-3F

68 Outdoor Units
 Electric
Characteristics

5. Electric Characteristics
Outdoor Unit
Model
Hz Voltage Min. Max.
FSOIF-120AE2 50 220-240V 198V 254V
FSOIF-181AE2 50 220-240V 198V 254V
FSOIF-241AE2 50 220-240V 198V 254V
FSOIF-300AE2 50 220-240V 198V 254V
FSOIF-361AE2-3F 50 380-415V 342V 440V

Outdoor Units 69
Operation Limits

6. Operation Limits
Temperature
Cooling operation Heating operation
Mode
Room temperature 17℃~32°C 0°C~30℃

Outdoor temperature -15℃～50℃ -15℃～24℃

CAUTION:
1. If the air conditioner is used beyond the above conditions, certain safety protection features may come
into operation and cause the unit to operate abnormally.
2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this figure, the
surface of the air conditioner may attract condensation. Please set the vertical air flow louver to its maximum
angle (vertically to the floor), and set HIGH fan mode.
3. The optimum performance will be achieved during this operating temperature zone.

70 Outdoor Units
 Sound Levels

7. Sound Levels
Outdoor Unit

Microphone

1.0m
Note: H= 0.5 × height of outdoor unit

Model Noise Power dB(A) Noise level dB(A)

FSOIF-120AE2 61 58
FSOIF-181AE2 65 60
FSOIF-241AE2 69 60
FSOIF-300AE2 70 61
FSOIF-361AE2-3F 70 63

Outdoor Units 71
Installation

Part 4
Installation
1. Installation Procedure...................................................... 73

2. Location selection ............................................................ 74

3. Indoor unit installation..................................................... 75

4. Outdoor unit installation (Side Discharge Unit) ............ 89

5. Refrigerant pipe installation ............................................ 90

6. Drainage pipe installation................................................ 94

7. Vacuum Drying and Leakage Checking ......................... 98

8. Additional refrigerant charge .......................................... 99

9. Engineering of insulation .............................................. 100

10. Engineering of electrical wiring .................................... 101

11. Test operation ................................................................. 102

72 Installation
 Installation Procedure

1. Installation Procedure

Indoor unit installation Outdoor unit installation

location selection location selection

Indoor unit installation Outdoor unit installation

Refrigerant pipe Refrigerant pipe

installation and insulation installation and insulation

Drainage pipe installation Drainage pipe installation

and insulation and insulation

Vacuum drying and leakage checking

Additional refrigerant charge

Insulation the joint part of refrigerant pipe

Wiring connection and electric safety checking

Test operation

Installation 73
Location selection

2. Location selection
2.1 Indoor unit location selection
 The place shall easily support the indoor unit’s weight.
 The place can ensure the indoor unit installation and inspection.
 The place can ensure the indoor unit horizontally installed.
 The place shall allow easy water drainage.
 The place shall easily connect with the outdoor unit.
 The place where air circulation in the room should be good.
 There should not be any heat source or steam near the unit.
 There should not be any oil gas near the unit
 There should not be any corrosive gas near the unit
 There should not be any salty air neat the unit
 There should not be strong electromagnetic wave near the unit
 There should not be inflammable materials or gas near the unit
 There should not be strong voltage vibration.

2.2 Outdoor unit location selection

 The place shall easily support the outdoor unit’s weight.
 Locate the outdoor unit as close to indoor unit as possible
 The piping length and height drop can not exceed the allowable value.
 The place where the noise, vibration and outlet air do not disturb the neighbors.
 There is enough room for installation and maintenance.
 The air outlet and the air inlet are not impeded, and not face the strong wind.
 It is easy to install the connecting pipes and cables.
 There is no danger of fire due to leakage of inflammable gas.
 It should be a dry and well ventilation place
 The support should be flat and horizontal
 Do not install the outdoor unit in a dirty or severely polluted place, so as to avoid blockage of the heat
exchanger in the outdoor unit.
 If is built over the unit to prevent direct sunlight, rain exposure, direct strong wend, snow and other scraps
accumulation, make sure that heat radiation from the condenser is not restricted.

More than 30cm

More than 60cm

(Service space)
More than 30cm
Fe
n
ob ce o
sta r
cle
s
More than 60cm

More than 200cm

74 Installation
 Indoor unit installation

3. Indoor unit installation

3.1 Super slim cassette indoor unit installation
3.1.1 Service space for indoor unit

Model A H Remark
18-30 205 >235 R410A Cooling / Cooling & Heating
36 245 >275 R410A Cooling / Cooling & Heating

3.1.2 Bolt pitch

3.1.3 Install the pendant bolt

Select the position of installation hooks according to the hook holes positions showed in upper picture.

Installation 75
Indoor unit installation

Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

3.1.4 Install the main body

Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on
the four installation hooks evenly, to ensure the balance of the body. Use a leveling instrument to make sure
the levelness of the main body is within ±1°.

Adjust the position to ensure the gaps between the body and the four sides of ceiling are even. The body's
lower part should sink into the ceiling for 10~12 mm. In general, L is half of the screw length of the
installation hook.

Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.

76 Installation
 Indoor unit installation

3.1.5 Install the panel

Remove the grille

Remove the 4 corner covers.

Hang the panel to the hooks on the mainbody. If the panel is with auto-lift grille, please watch the ropes lifing
the grille, DO NOT make the ropes enwinded or blocked.

Installation 77
Indoor unit installation

Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate
water.

Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control
box with corresponding terminators on the body respectively.

Install the 4 corner covers back.

Note: The panel shall be installed after the wiring connected.

78 Installation
 Indoor unit installation

3.2 Duct indoor unit installation

3.2.1 Service space for indoor unit

3.2.2 Bolt pitch

Size of outline dimension mounted plug

Capacity(KBtu)
L M
18/24 960 350
30 1180 490
36 1240 500

3.2.3 Install the pendant bolt

Select the position of installation hooks according to the hook holes positions showed in upper picture.
Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

Installation 79
Indoor unit installation

3.2.4 Install the main body

Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on
the four installation hooks evenly, to ensure the balance of the body. Use a leveling instrument to make sure
the levelness of the main body is within ±1°.

3.2.5 Install the air filter

Insert the air filter through the filter slot and fix it with 2 screws.

3.2.6 Install the air duct

Please design the air duct as below recommended picture

80 Installation
 Indoor unit installation

3.2.7 Change the air inlet direction

① Take off ventilation panel and flange, cut off the staples at side rail.

② Stick the attached seal sponge as per the indicating place in the following fig, and then change the
mounting positions of air return panel and air return flange .

③ When install the filter mesh, please plug it into flange inclined from air return opening, and then push up.

④ The installation has finish, upon filter mesh which fixing blocks have been insert to the flange positional
holes.

Installation 81
Indoor unit installation

3.3 Ceiling & floor indoor unit installation

3.3.1 Service space for indoor unit

3.3.2 Bolt pitch

① Ceiling installation

Capacity (Btu/h) D E
18K, 24K 983 220
36K 1200 220

② Wall-mounted installation

3.3.3 Install the pendant bolt

82 Installation
 Indoor unit installation

① Ceiling installation
Select the position of installation hooks according to the hook holes positions showed in upper picture.
Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

② Wall-mounted installation
Install the tapping screws onto the wall.(Refer to picture below)

3.3.4 Install the main body

① Ceiling installation (The only installation method for the unit with drain pump)
Remove the side board and the grille.

Locate the hanging arm on the hanging screw bolt. Prepare the mounting bolts on the unit.

Installation 83
Indoor unit installation

Put the side panels and grilles back.

② Wall-mounted installation
Hang the indoor unit by insert the tapping screws into the hanging arms on the main unit. (The bottom of
body can touch with floor or suspended, but the body must install vertically.)

84 Installation
 Indoor unit installation

3.4 Compact cassette indoor unit installation

3.4.1 Service space for indoor unit

3.4.2 Bolt pitch

3.4.3 Install the pendant bolt

Select the position of installation hooks according to the hook holes positions showed in upper picture.
Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

Installation 85
Indoor unit installation

Face the concave side of the installation hooks toward the expansible hooks. Determine the length of the
installation hooks from the height of ceiling, then cut off the unnecessary part.
If the ceiling is extremely high, please determine the length of the installation hook depending on the real
situation.

3.4.4 Install the main body

Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on
the four installation hooks evenly, to ensure the balance of the body. Use a leveling instrument to make sure
the levelness of the main body is within ±1°.

Adjust the position to ensure the gaps between the body and the four sides of ceiling are even. The body's
lower part should sink into the ceiling for 10~12 mm. In general, L is half of the screw length of the
installation hook.

Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.

3.4.5 Install the panel

Remove the grille

86 Installation
 Indoor unit installation

Hang the panel to the hooks on the mainbody.

Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate
water.

Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control
box with corresponding terminators on the body respectively.

Note: The panel shall be installed after the wiring connected.

Installation 87
Indoor unit installation

3.5 Console indoor unit installation

3.5.1 Service space for indoor unit

3.5.2 Install the main body

 Fix the hook with tapping screw onto the wall

 Hang the indoor unit on the hook.

(The bottom of body can touch with floor or suspended, but the body must install vertically.)

88 Installation
 Outdoor unit installation (Side Discharge Unit)

4. Outdoor unit installation (Side Discharge Unit)

4.1 Service space for outdoor unit
(Wall or obstacle)

Air inlet More than 30cm More than 60cm

More than 30cm
Maintain channel
Air inlet
More than 60cm

Air outlet
More than 200cm

4.2 Bolt pitch

Model B C D
FSOIF-120AE2 530 290 315
FSOIF-181AE2 560 335 360
FSOIF-241AE2
590 333 355
FSOIF-300AE2
FSOIF-361AE2-3F 624 366 396
4.3 Install the Unit
Since the gravity center of the unit is not at its physical center, so please be careful when lifting it with a sling.
Never hold the inlet of the outdoor unit to prevent it from deforming.
Do not touch the fan with hands or other objects.
Do not lean it more than 45, and do not lay it sidelong.
Make concrete foundation according to the specifications of the outdoor units.
Fasten the feet of this unit with bolts firmly to prevent it from collapsing in case of earthquake or strong wind.

Installation 89
Refrigerant pipe installation

5. Refrigerant pipe installation

5.1 Maximum pipe length and height drop
Considering the allowable pipe length and height drop to decide the installation position. Make sure the
distance and height drop between indoor and outdoor unit not exceeded the date in the following table.
Model Max. Length Max. Elevation
12,000Btu/h 20m 10m
18,000Btu/h 30m 20m
24,000Btu/h~30,000Btu/h 50m 25m
36,000Btu/h 65m 30m

5.2 The procedure of connecting pipes

5.2.1 Choose the pipe size according to the specification table.
5.2.2 Confirm the cross way of the pipes.
5.2.3 Measure the necessary pipe length.
5.2.4 Cut the selected pipe with pipe cutter
 Make the section flat and smooth.
o

Lean Crude Burr

90

5.2.5 Insulate the copper pipe

 Before test operation, the joint parts should not be heat insulated.
5.2.6 Flare the pipe
 Insert a flare nut into the pipe before flaring the pipe
 According to the following table to flare the pipe

90 Installation
 Refrigerant pipe installation

Flare dimension A (mm)

Pipe diameter Flare shape
Min Max
90°
+- 4
1/4" (6.35) 8.3 8.7
45¡
ã
A
3/8" (9.52) 12.0 12.4

1/2" (12.7) 15.4 15.8 R0.4~0.8

5/8" (15.9) 18.6 19.1

3/4" (19) 22.9 23.3

 After flared the pipe, the opening part must be seal by end cover or adhesive tape to avoid duct or
exogenous impurity come into the pipe.
5.2.7 Drill holes if the pipes need to pass the wall.
5.2.8 According to the field condition to bend the pipes so that it can pass the wall smoothly.
5.2.9 Bind and wrap the wire together with the insulated pipe if necessary.
5.2.10 Set the wall conduit
5.2.11 Set the supporter for the pipe.
5.2.12 Locate the pipe and fix it by supporter
 For horizontal refrigerant pipe, the distance between supporters should not be exceed 1m.
 For vertical refrigerant pipe, the distance between supporters should not be exceed 1.5m.
5.2.13 Connect the pipe to indoor unit and outdoor unit by using two spanners.
 Be sure to use two spanners and proper torque to fasten the nut, too large torque will damage the
bellmouthing, and too small torque may cause leakage. Refer the following table for different pipe
connection.
Torque Sketch map
Pipe Diameter
(kgf.cm) (N.cm)

1/4" (6.35) 144~176 1420~1720

3/8" (9.52) 333~407 3270~3990

1/2" (12.7) 504~616 4950~6030

5/8" (15.9) 630~770 6180~7540

3/4" (19) 990~1210 9270~11860

5.3 For Units with Twins Function

5.3.1 Length and drop height permitted of the refrigerant piping
Note: Reduced length of the branching tube is the 0.5m of the equivalent length of the pipe.

Installation 91
Refrigerant pipe installation

Note: All used branch pipe must be produced by the factory, otherwise it causes malfunction.
The indoor units should be installed equivalently at the both side of the U type branch
pipe.

Permitted Value Piping

18K+18K 30m
Total pipe length (Actual) 24K+24K 50m L+L1+L2
Length
Pipe

30K+30K 50m
Max. branch pipe length 15m L1, L2
Max. branch pipe length difference 10m L1-L2
Max. height difference between
20m H1
Height
Drop

indoor unit and outdoor unit

Max. height difference between
0.5m H2
indoor units

5.3.2 Size of joint pipes for indoor unit (R410a)

5.3.3 Size of joint pipes for outdoor unit (R410a)

5.3.4 The branching pipe must be installed horizontally, error angle of it should not large than 10°. Otherwise,
malfunction will be caused.

92 Installation
 Refrigerant pipe installation

Installation 93
Drainage pipe installation

6. Drainage pipe installation

Install the drainage pipe as shown below and take measures against condensation. Improperly installation
could lead to leakage and eventually wet furniture and belongings.

6.1 Installation principle

 Ensure at least 1/100 slope of the drainage pipe
 Adopt suitable pipe diameter
 Adopt nearby condensate water discharge

6.2 Key points of drainage water pipe installation

6.2.1 Considering the pipeline route and elevation
 Before installing condensate water pipeline, determine its route and elevation to avoid intersection with
other pipelines and ensure slope is straight.
6.2.2 Drainage pipe selection
 The drainage pipe diameter shall not small than the drain hose of indoor unit
 According to the water flowrate and drainage pipe slope to choose the suitable pipe, the water flowrate
is decided by the capacity of indoor unit.
Relationship between water flowrate and capacity of indoor unit
Capacity (x1000Btu) Water flowrate (l/h)
12 2.4
18 4
24 6
30 7
36 8
42 10
48 12
60 14
According to the above table to calculate the total water flowrate for the confluence pipe selection.
For horizontal drainage pipe (The following table is for reference)
Reference value of inner Allowable maximum water flowrate (l/h)
PVC pipe Remark
diameter of pipe (mm) Slope 1/50 Slope 1/100
PVC25 20 39 27
For branch pipe
PVC32 25 70 50
PVC40 31 125 88
PVC50 40 247 175 Could be used for confluence pipe
PVC63 51 473 334
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
For Vertical drainage pipe (The following table is for reference)
Reference value of inner
PVC pipe Allowable maximum water flowrate (l/h) Remark
diameter of pipe (mm)
PVC25 20 220
For branch pipe
PVC32 25 410
PVC40 31 730
PVC50 40 1440
PVC63 51 2760 Could be used for confluence pipe
PVC75 67 5710
PVC90 77 8280
Attention: Adopt PVC40 or bigger pipe to be the main pipe.

94 Installation
 Drainage pipe installation

6.2.3 Individual design of drainage pipe system

 The drainage pipe of air conditioner shall be installed separately with other sewage pipe, rainwater pipe
and drainage pipe in building.
 The drainage pipe of the indoor unit with water pump should be apart from the one without water pump.
6.2.4 Supporter gap of drainage pipe
 In general, the supporter gap of the drainage pipe horizontal pipe and vertical pipe is respectively
1m~1.5m and 1.5m~2.0m.
 Each vertical pipe shall be equipped with not less than two hangers.
 Overlarge hanger gap for horizontal pipe shall create bending, thus leading to air block.

Too long distance

Gas bag

6.2.5 The horizontal pipe layout should avoid converse flow or bad flow
Drainage pipe Drainage pipe Drainage pipe Drain tee

Water flow Water flow Water flow Water flow Water flow

Drain tee Drain tee Water flow

Water flow

Water flow Water flow

Branch pipe Water flow

Gas Gas
Water flow
Keep a certain degree Main pipe
Main pipe

Branch pipe

 The correct installation will not cause converse water flow and the slope of the branch pipes can be
adjusted freely
 The false installation will cause converse water flow and the slope of the branch pipe can not be
adjusted.
6.2.6 Water storage pipe setting
 If the indoor unit has high extra static pressure and without water pump to elevate the condensate water,
such as high extra static pressure duct unit , the water storage pipe should be set to avoid converse flow
or blow water phenomena.

Installation 95
Drainage pipe installation

Indoor unit

More than 50mm

Plug
More than 25mm

Water storage pipe

6.2.7 Lifting pipe setting of indoor unit with water pump

 The length of lifting pipe should not exceed the pump head of indoor unit water pump.
Pump head of big four way cassette: 750mm
Pump head of compact four way cassette: 500mm
 The drainage pipe should be set down inclined after the lifting pipe immediately to avoid wrong
operation of water level switch.
 Refer the following picture for installation reference.

Hanger

A Down incline pipe

A:Length of horizontal pipe ≤150mm

B B: Lift height≤the pump head of water pump

Flexible pipe 300mm

6.2.8 Blowhole setting

 For the concentrated drainage pipe system, there should design a blowhole at the highest point of main
pipe to ensure the condensate water discharge smoothly.
 The air outlet shall face down to prevent dirt entering pipe.
 Each indoor unit of the system should be installed it.
 The installation should be considering the convenience for future cleaning.
Blowhole

Indoor unit Indoor unit

Plug Plug

6.2.9 The end of drainage pipe shall not contact with ground directly.

96 Installation
 Drainage pipe installation

6.3 Drainage test

6.3.1 Water leakage test
After finishing the construction of drainage pipe system, fill the pipe with water and keep it for 24 hours to
check whether there is leakage at joint section.
6.3.2 Water discharge test
1. Natural drainage mode(the indoor unit with outdoor drainage pump)
Infuse above 600ml water through water test hole slowly into the water collector, observe whether the
water can discharge through the transparent hard pipe at drainage outlet.
2. Pump drainage mode
2.1 Disconnect the plug of water level switch, remove the cover of water test hole and slowly infuse about
2000ml water through the water test hole, be sure that the water will not touch the motor of drainage
pump.

2.2 Power on and let the air conditioner operate for cooling. Check operation status of drainage pump, and
then connect the plug of water level switch, check the operation sound of water pump and observe
whether the water can discharge through the transparent hard pipe at drainage outlet. (In light of the
length of drainage pipe, water shall be discharged about 1 minute delayed)
2.3 Stop the operation of air conditioner, power off the power supply and put the cover of water test hole
back to the original place.
a. After stopped the air conditioner 3 minutes, check whether there is anything abnormal. If drainage pipes
have not been distributed properly, over back-flow water shall cause the flashing of alarm indicator at
remote-controlled receiving board and even water shall run over the water collector.
b. Continuously infusing water until water level alarmed, check whether the drainage pump could
discharge water at once. If water level does not decline under warning water level 3 minutes later, it
shall cause shutdown of unit. When this situation happens, the normal startup only can be recovered by
turning down power supply and eliminating accumulated water.
Note: Drain plug at the main water-containing plate is used for eliminating accumulated water in
water-containing plate when maintaining air conditioner fault. During normal operation, the plug shall be
filled in to prevent leakage.

6.4 Insulation work of drainage pipe

Refer the introduction to the insulation engineering parts.

Installation 97
Vacuum Drying and Leakage Checking

7. Vacuum Drying and Leakage Checking

7.1 Purpose of vacuum drying
 Eliminating moisture in system to prevent the phenomena of ice-blockage and copper oxidation.
Ice-blockage shall cause abnormal operation of system, while copper oxide shall damage compressor.
 Eliminating the non-condensable gas (air) in system to prevent the components oxidizing, pressure
fluctuation and bad heat exchange during the operation of system.

7.2 Selection of vacuum pump

 The ultimate vacuum degree of vacuum pump shall be -756mmHg or above.
 Precision of vacuum pump shall reach 0.02mmHg or above.

7.3 Operation procedure for vacuum drying

Due to different construction environment, two kinds of vacuum drying ways could be chosen, namely
ordinary vacuum drying and special vacuum drying.

7.3.1 Ordinary vacuum drying

1. When conduct first vacuum drying, connect pressure gauge to the infusing mouth of gas pipe and liquid
pipe, and keep vacuum pump running for 1hour (vacuum degree of vacuum pump shall be reached
-755mmHg).
2 If the vacuum degree of vacuum pump could not reach -755mmHg after 1 hour of drying, it indicates
that there is moisture or leakage in pipeline system and need to go on with drying for half an hour.
3 If the vacuum degree of vacuum pump still could not reach -755mmHg after 1.5 hours of drying, check
whether there is leakage source.
4 Leakage test: After the vacuum degree reaches -755mmHg, stop vacuum drying and keep the pressure
for 1 hour. If the indicator of vacuum gauge does not go up, it is qualified. If going up, it indicates that
there is moisture or leak source.

7.3.2 Special vacuum drying

The special vacuum drying method shall be adopted when:
1. Finding moisture during flushing refrigerant pipe.
2. Conducting construction on rainy day, because rain water might penetrated into pipeline.
3. Construction period is long, and rain water might penetrated into pipeline.
4. Rain water might penetrate into pipeline during construction.

Procedures of special vacuum drying are as follows:

1. Vacuum drying for 1 hour.
2. Vacuum damage, filling nitrogen to reach 0.5Kgf/cm2 .
Because nitrogen is dry gas, vacuum damage could achieve the effect of vacuum drying, but this
method could not achieve drying thoroughly when there is too much moisture. Therefore, special
attention shall be drawn to prevent the entering of water and the formation of condensate water.
3. Vacuum drying again for half an hour.
If the pressure reached -755mmHg, start to pressure leakage test. If it cannot reached the value,
repeat vacuum damage and vacuum drying again for 1 hour.
4 Leakage test: After the vacuum degree reaches -755mmHg, stop vacuum drying and keep the pressure
for 1 hour. If the indicator of vacuum gauge does not go up, it is qualified. If going up, it indicates that
there is moisture or leak source.

98 Installation
 Additional refrigerant charge

8. Additional refrigerant charge

 After the vacuum drying process is carried out, the additional refrigerant charge process need to be
performed.
 The outdoor unit is factory charged with refrigerant. The additional refrigerant charge volume is decided
by the diameter and length of the liquid pipe between indoor and outdoor unit. Refer the following
formula to calculate the charge volume.
Diameter of liquid pipe (mm) Φ6.35 Φ9.52
Formula V=11g/m×(L-5) V=30g/m×(L-5)
V: Additional refrigerant charge volume (g).
L : The length of the liquid pipe (m).

Note:
 Refrigerant may only be charged after performed the vacuum drying process.
 Always use gloves and glasses to protect your hands and eyes during the charge work.
 Use electronic scale or fluid infusion apparatus to weight refrigerant to be recharged. Be sure to avoid
extra refrigerant charged, it may cause liquid hammer of the compressor or protections.
 Use supplementing flexible pipe to connect refrigerant cylinder, pressure gauge and outdoor unit. And
The refrigerant should be charged in liquid state. Before recharging, The air in the flexible pipe and
manifold gauge should be exhausted.
 After finished refrigerant recharge process, check whether there is refrigerant leakage at the connection
joint part.(Using gas leakage detector or soap water to detect).

Installation 99
Engineering of insulation

9. Engineering of insulation
9.1 Insulation of refrigerant pipe
9.1.1 Operational procedure of refrigerant pipe insulation
Cut the suitable pipe → insulation (except joint section) → flare the pipe → piping layout and connection→
vacuum drying → insulate the joint parts

9.1.2 Purpose of refrigerant pipe insulation

 During operation, temperature of gas pipe and liquid pipe shall be over-heating or over-cooling
extremely. Therefore, it is necessary to carry out insulation; otherwise it shall debase the performance
of unit and burn compressor.
 Gas pipe temperature is very low during cooling. If insulation is not enough, it shall form dew and cause
leakage.
 Temperature of gas pipe is very high (generally 50-100℃) during heating. Insulation work must be
carried out to prevent hurt by carelessness touching.

9.1.3 Insulation material selection for refrigerant pipe

 The burning performance should over 120℃
 According to the local law to choose insulation materials
 The thickness of insulation layer shall be above 10mm.If in hot or wet environment place, the layer of
insulation should be thicker accordingly.

9.1.4 Installation highlights of insulation construction

 Gas pipe and liquid pipe shall be insulated separately, if the gas pipe and liquid pipe were insulated
together; it will decrease the performance of air conditioner.
Liquid pipe Insulation meterial Gas pipe

 The insulation material at the joint pipe shall be 5~10cm longer than the gap of the insulation material.
 The insulation material at the joint pipe shall be inserted into the gap of the insulation material.
 The insulation material at the joint pipe shall be banded to the gap pipe and liquid pipe tightly.
 The linking part should be use glue to paste together
 Be sure not bind the insulation material over-tight, it may extrude out the air in the material to cause bad
insulation and cause easy aging of the material.

9.2 Insulation of drainage pipe

9.2.1 Operational procedure of refrigerant pipe insulation
Select the suitable pipe → insulation (except joint section) → piping layout and connection→ drainage test→
insulate the joint parts

9.2.2 Purpose of drainage pipe insulation

The temperature of condensate drainage water is very low. If insulation is not enough, it shall form dew and
cause leakage to damage the house decoration.

100 Installation
 Engineering of electrical wiring

9.2.3 Insulation material selection for drainage pipe

 The insulation material should be flame retardant material, the flame retardancy of the material should
be selected according to the local law.
 Thickness of insulation layer is usually above 10mm.
 Use specific glue to paste the seam of insulation material, and then bind with adhesive tape. The width
of tape shall not be less than 5cm. Make sure it is firm and avoid dew.

9.2.4 Installation and highlights of insulation construction

 The single pipe should be insulated before connecting to another pipe, the joint part should be insulated
after the drainage test.
 There should be no insulation gap between the insulation material.

10. Engineering of electrical wiring

10.1 Highlights of electrical wiring installation
 All field wiring construction should be finished by qualified electrician.
 Air conditioning equipment should be grounded according to the local electrical regulations.
 Current leakage protection switch should be installed.
 Do not connect the power wire to the terminal of signal wire.
 When power wire is parallel with signal wire, put wires to their own wire tube and remain at least 300mm
gap.
 According to table in indoor part named “the specification of the power” to choose the wiring, make sure
the selected wiring not small than the date showing in the table.
 Select different colors for different wire according to relevant regulations.
 Do not use metal wire tube at the place with acid or alkali corrosion, adopt plastic wire tube to replace it.
 There must be not wire connect joint in the wire tube If joint is a must, set a connection box at the place.
 The wiring with different voltage should not be in one wire tube.
 Ensure that the color of the wires of outdoor and the terminal No. are same as those of indoor unit
respectively.

Installation 101
Test operation

11. Test operation

11.1 The test operation must be carried out after the entire installation has been
completed.
11.2 Please confirm the following points before the test operation.
 The indoor unit and outdoor unit are installed properly.
 Tubing and wiring are correctly completed.
 The refrigerant pipe system is leakage-checked.
 The drainage is unimpeded.
 The ground wiring is connected correctly.
 The length of the tubing and the added stow capacity of the refrigerant have been recorded.
 The power voltage fits the rated voltage of the air conditioner.
 There is no obstacle at the outlet and inlet of the outdoor and indoor units.
 The gas-side and liquid-side stop values are both opened.
 The air conditioner is pre-heated by turning on the power.
11.3 Test operation
Set the air conditioner under the mode of "COOLING" by remote controller, and check the following points.
Indoor unit
 Whether the switch on the remote controller works well.
 Whether the buttons on the remote controller works well.
 Whether the air flow louver moves normally.
 Whether the room temperature is adjusted well.
 Whether the indicator lights normally.
 Whether the temporary buttons works well.
 Whether the drainage is normal.
 Whether there is vibration or abnormal noise during operation.
Outdoor unit
 Whether there is vibration or abnormal noise during operation.
 Whether the generated wind, noise, or condensed of by the air conditioner have influenced your
neighborhood.
 Whether any of the refrigerant is leaked.

102 Installation
 Electrical Control System

Part 5
Electrical Control System
1. Electrical Control Function ................................... 104

2. Troubleshooting .................................................... 118

3. Controller ............................................................... 150

Electrical Control System 103

Electrical Control Function

1. Electrical Control Function

1.1 Definition
T1: Indoor room temperature
T2: Coil temperature of indoor heat exchanger middle.
T2B: Coil temperature of indoor heat exchanger outlet.
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
1.2 Main Protection
1.2.1 Time delay at restart for compressor.
1.2.2 Temperature protection of compressor top
The unit will stop working when the compressor top temp. protector cut off, and will restart after the
compressor top temp. protector restart.
1.2.3 Temperature protection of compressor discharge
For 12K units:
When the compressor discharge temp. is getting higher, the running frequency will be limited as below rules:
---Compressor discharge temp. T5>115℃ for 5s, compressor stops and restarts up till T5<90℃
---110<T5<115℃, decrease the frequency to the lower level every 2 minutes.
---105<T5<110℃, keep running at the current frequency.
----T5<105℃, no limit for frequency.

For other units:

When the compressor discharge temp. is getting higher, the running frequency will be limited as below rules:
----If 102℃<T5<115℃, decrease the frequency to the lower level every 2 minutes till to F1.
---If T5>115℃ for 10 seconds, the compressor will stop and restart till T5<90℃.
1.2.4 Sensor protection at open circuit and breaking disconnection.
1.2.5 Indoor fan delayed open function
For M floor-standing:
When the unit starts up, the louver will be active immediately and the indoor fan will open 5s later.
If the unit runs in heating mode, the indoor fan will be also controlled by anti-cold wind function.
For other models:
When the unit starts up, the louver will be active immediately and the indoor fan will open 10s later.
If the unit runs in heating mode, the indoor fan will be also controlled by anti-cold wind function.
1.2.6 Fan Speed is out of control(for units used DC motor)
For super slim cassette: When indoor fan speed keeps too low (lower than 200RPM) for 50s, the unit will
stop and the LED will display the failure.
For M floor-standing: When indoor fan speed keeps too low (lower than 300RPM) for 10s, the unit will stop
and the LED will display the failure.
For other models: When indoor fan speed keeps too low (lower than 300RPM) for 50s, the indoor fan will
shut off and restart 30s later, if protection happened 3 times when fan motor restart continuously, the unit will
stop and the LED will display the failure.
104 Electrical Control System
 Electrical Control Function

1.3 Operation Modes and Functions

1.3.1 Fan mode
(1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) For Console& Compact cassette(12K): Indoor fan can be set to high/med/low/ breeze, for other models:
Indoor fan can be set to high/(med)/low/auto;
(4) The louver operates same as in cooling mode.
(5) Auto fan:
For Console:
T 1 -2 4
H
6 .0
a (H -L )* 0 .7 5 + L
5 .0
b (H -L )* 0 .5 + L
4 .0
c (H -L )* 0 .2 5 + L
2 .5
d L
1 .0
e

For Compact cassette(12K)、A5(12K)

3.5
High
3.0

Medium
1.5

1.0

Low

Ts=24

For other models:

5.0
High
4.0

Medium
3.0

2.0

Low

Ts=24

1.3.2 Cooling Mode

1.3.2.1 Outdoor PMW open angle control
The unit is working in cooling mode with the EXV open 300P(For 12K, it is 220P) for 3 minutes, then
adjusting PMW open angle according to the temperature of compressor discharge every 2 minutes.

Electrical Control System 105

Electrical Control Function

1.3.2.2 Outdoor fan running rules

T4

A DC_FAN_HI_SPD_ADD
28℃

26℃
B DC_FAN_MID_SPD_ADD
25℃

23℃
C DC_FAN_MIN_SPD_ADD
22℃

20℃
D DC_FAN_SLOW_SPD_ADD
19℃

17℃
E DC_FAN_SSLOW_SPD_ADD

1.3.2.3 Indoor fan running rules

For Console(12K):
In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and
silent. When the compressor is running, the indoor fan is controlled as below:

The auto fan acts as below rules:

T1-Ts
H
6.0
a (H -L)*0.75+L
5.0
b (H -L)*0.5+L
4.0
c (H -L)*0.25+L
2.5
d L
1.0
e

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For Compact cassette(12K)

In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and
silent.
The auto fan:

3.5
High
3.0

Medium
1.5

1.0

Low

For other models:

5.0
High
4.0
Medium
3.0

2.0

Low

1.3.2.4 Evaporator low temperature T2 protection.

For 12K models：
---T2<0℃, the compressor will stop and restart when T2>=5℃.
---0℃≦T2<4℃, the compressor frequency will be limited and decreased to the lower level
---4℃≤T2<7℃, the compressor will keep the current frequency.
---T2>7℃, the compressor frequency will not be limited.
For other models: When T2<2°C and lasts for 3 minutes, the indoor has no capacity demand and resume till
T2≥7°C.

1.3.2.5 Condenser high temperature T3 protection

For 12K models :
---55℃<T3<60℃, the compressor frequency will decrease to the lower level until to F1 and then runs at F1.If
T3<55℃, the compressor will keep running at the current frequency.
---T3<52℃, the compressor will not limit the frequency and resume to the former frequency.
---T3>60℃ for 5 seconds, the compressor will stop until T3<52℃.
For other models: When T3≥65℃ for 3 seconds, the compressor will shut off. When T3＜52,the compressor
will restart.

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Electrical Control Function

1.3.3 Heating Mode

1.3.2.1 Outdoor PMW open angle control
The unit is working in heating mode with the EXV open 300P(For 12K,it is 480P) for 3 minutes, then
adjusting PMW open angle according to the temperature of compressor discharge every 2 minutes.
1.3.3.2 Outdoor fan running rules:

T4

E DC_FAN_SSLOW_SPD_ADD
21℃

19℃
D DC_FAN_SLOW_SPD_ADD
18℃

16℃
C DC_FAN_MIN_SPD_ADD
15℃

13℃
B DC_FAN_MID_SPD_ADD
12℃

10℃
A DC_FAN_HI_SPD_ADD

1.3.3.3 Indoor fan running rules:

For Console(12K):
In heating mode, indoor fan can be selected as high, medium, low, auto and silent. The anti-cold- wind
function has the priority.
When the compressor is running, the indoor fan is controlled as below:

If the compressor stops caused by the room temperature rising, the indoor fan will be forced to run 127
seconds with breeze. During this period, the anti-cold-wind is disabled.
Auto fan action in heating mode:

108 Electrical Control System

 Electrical Control Function

T1-Ts+¦ ¤
T

0.0
L
-1.0
(H+-L)*0.2+L
-2.0
(H+-L)*0.4+L
-3.0
(H+-L)*0.6+L
-4.0
(H+-L)*0.6+L
-5.0
-6.0 (H+-L)*0.8+L
-6.5
H+

For Compact cassette(12K):

When the compressor is on, the indoor fan can be set to high, medium, low, auto and silent. And the
anti-cold wind function has the priority.
Auto fan action:

T1-Ts-¦ ¤T

Low
-3.5

-4
Medium
-4.5
-5
High

For other models:

When the compressor is on, the indoor fan can be set to high/medium/low/auto. And the anti-cold wind
function has the priority.
Auto fan action:
T1-Ts-¦ T
¤

Low
-2

-3
Medium
-4
-5
High

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Electrical Control Function

1.3.3.4 Defrosting mode：

For 12K models：

Condition of defrosting:
If any one of the following items is satisfied, AC will enter the defrosting mode.
After the compressor starts up and keeps running, mark the minimum value of T3 from the 10th minutes to
15th minutes as T30.
1)If the compressor cumulate running time is up to 29 minutes and T3< TCDI1, T3＋T30SUBT3ONE≦T30.
2)If the compressor cumulate running time is up to 35 minutes and T3< TCDI2, T3＋T30SUBT3TWO≦T30.
3)If the compressor cumulate running time is up to 29 minutes and T3< TCDI3 for 3 minutes.
4)If the compressor cumulate running time is up to 120 minutes and T3<-15℃.
Condition of ending defrosting:
If any one of the following items is satisfied, the defrosting will finish and the machine will turn to normal
heating mode.
----T3 rises to be higher than TCDE1℃.
----T3 keeps to be higher than TCDE2℃ for 80 seconds.
----The machine has run for 10 minutes in defrosting mode.
Defrosting action：

Frequency F3 FrequencyF16

on
Compressor
off

on
4-way valve
off

on
Outdoor fan
off

on
Indoor fan
off

10s
Indoor fan breeze(10s)
xx
10s

no longer than 10m 30s

xx=90

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 Electrical Control Function

The other models:

Condition of defrosting:

T4
Time1
3℃
Time2

Time conditions:
time1
Time conditions(Meet the following conditions)
1.Running in heating mode
2. T4≥3℃
3. Compressor is on
4. T3≤TempEnterDefrost_ADD ℃
Cleared conditions (Meet any one of the following conditions)
1. Compressor is off.
2. T3＞TempEnterDefrost_ADD ℃

Time2
Time conditions(Meet the following conditions)
1.Running in heating mode
2. T4<3℃
3. Compressor is on
4. T3≤TempEnterDefrost_ADD ℃

Cleared conditions (Meet any one of the following conditions)

1. Compressor is off and T3＞TempEnterDefrost_ADD +2℃ last for 20 minutes
2. Running in cooling mode.
3. Compressor is off for 1 hour.

Condition of entry defrosting:

time1+ time2≥40 minutes, When defrosting is end,time1 and time2 are cleared.

Condition of ending defrosting:

If any one of following items is satisfied, defrosting will stop and the machine will turn to normal heating
mode.
① The defrosting time achieves 10min;

② T3 ≥15℃;
③ T3 ≥7℃ for 60seconds.

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Electrical Control Function

Defrosting action：

4-Way valve

no longer than 10min

Compressor

TimeA 10S
10S 30S
Indoor fan

Outdoor fan

PMV running
PMV 8 mins with 300P
480P

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 Electrical Control Function

1.3.3.5 High evaporator coil temp.T2 protection:

For 12K models：

T2

Off
TEstop
Decrease
TEdown
Hold
TEnorm
Resume

Off: Compressor stops.

Decrease: Decrease the running frequency to the lower level.
Hold: Keep the current frequency.
Resume: No limitation for frequency.
For other models:T2>60℃, the compressor will stop and restart when T2≤54℃.

1.3.4 Auto-mode
This mode can be chosen with remote controller and the setting temperature can be changed between
17~30℃.
In auto mode, the machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts).
For 12K models:
ΔT=T1-Ts Running mode

ΔT＞1℃ Cooling

-1<ΔT≤1℃ Fan-only

ΔT≤-1℃ Heating

For other models:

ΔT=T1-Ts Running mode

ΔT≥2℃ Cooling

-1≤ΔT<2℃ Fan-only

ΔT<-1℃ Heating

Indoor fan will run at auto fan of the relevant mode.

The louver operates same as in relevant mode.
If the machine switches mode between heating and cooling, the compressor will keep stopping for 15
minutes and then choose mode according to T1-Ts.
If the setting temperature is modified, the machine will choose running function again.

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Electrical Control Function

1.3.5 Drying mode

For 12K models:
Indoor fan speed is fixed at breeze and can’t be changed. The louver angle is the same as in cooling mode.
Low indoor room temperature protection
In drying mode, if room temperature is lower than 10℃, the compressor will stop and not resume until room
temperature exceeds 12℃.
All protections are active and the same as that in cooling mode.
For other models: Drying mode works the same as cooling mode in low speed.
All protections are active and the same as that in cooling mode.

1.3.6 Timer function

1.3.6.1 Timing range is 24 hours.
1.3.6.2 Timer on. The machine will turn on automatically when reaching the setting time.
1.3.6.3 Timer off. The machine will turn off automatically when reaching the setting time.
1.3.6.4 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and then
turn off automatically when reaching the setting “off” time.
1.3.6.5 Timer off/on. The machine will turn off automatically when reaching the setting “off” time, and then
turn on automatically when reaching the setting “on” time.
1.3.6.6 The timer function will not change the AC current operation mode. Suppose AC is off now, it will not
start up firstly after setting the “timer off” function. And when reaching the setting time, the timer LED will be
off and the AC running mode has not been changed.
1.3.6.7 The setting time is relative time.

1.3.7 Economy function

1.3.7.1 The sleep function is available in cooling, heating or auto mode.
1.3.7.2. Operation process in sleep mode is as follow:
When cooling, the setting temperature rises 1℃ (be lower than 30℃) every one hour, 2 hours later the
setting temperature stops rising and the indoor fan is fixed at low speed.
When heating, the setting temperature decreases 1℃ (be higher than 17℃) every one hour, 2 hours later
the setting temperature stops rising and indoor fan is fixed at low speed. (Anti-cold wind function has the
priority).
1.3.7.3 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode but doesn’t turns off,
but for console, the unit will turn off.
1.3.7.4 Timer setting is available

1.3.8 Auto-Restart function

The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In
case of a sudden power failure, the module memorizes the setting conditions before the power failure. The
unit will resume the previous operation setting (not including Swing function) automatically after 3 minutes
when power returns.

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 Electrical Control Function

1.3.9 Drain pump control (For Cassette)

Adopt the water-level switch to control the action of drain pump.
Main action under different condition :( every 5 seconds the system will check the water level one time)
1. When the A/C operates with cooling (including auto cooling) and forced cooling mode, the pump will start
running immediately and continuously, till stop cooling.
2. Once the water level increase and up to the control point, LED will alarm and the drain pump open and
continue checking the water level. If the water level fall down and LED disalarmed (drain pump delay close 1
minute) and operate with the last mode. Otherwise the entire system stop operating ( including the pump)
and LED remain alarming after 3 minutes.

1.3.10 Follow me

1) If the indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote

controller, the buzzer will emit a sound and this indicates the follow me function is initiated. But when the

indoor PCB receives signal which sent from remote controller every 3 minutes, the buzzer will not

respond. When the unit is running with follow-me function, the PCB will control the unit according to the

temperature from follow-me signal, and the temperature collection function of room temperature sensor

will be shielded.

2) When the follow-me function is available, the PCB will not respond according to the setting temperature

from follow-me signal every 3 minutes.

3) The PCB will take action to the mode change information from remote controller signal, and the

follow-me function will be turned off. (if the wired remote controller does not initiate follow me function).

4) When the unit is running with follow-me function, if the PCB doesn’t receive any signal from remote

controller for 7 minutes or pressing FOLLOW ME button again, the follow-me function will be turned off

automatically, and the temperature collection function of room temperature sensor will be available, the

PCB will control the unit according to the room temperature detected from its own room temperature

sensor and setting temperature.

5) When the indoor PCB receives the follow-me signal from wired remote controller, the control is the
same as that from wireless remote controller, but buzzer will not respond. When the PCB receives
turning-off follow-me signal from wired remote controller, the unit will quit follow-me function at once.
The follow-me function controlled by wired remote controller prevails that by wireless remote controller.

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Electrical Control Function

1.3.11 Point Check Function(Excluding 12K)

There is a check switch in outdoor PCB.
Press the switch SW1 to check the states of unit when the unit is running.
Press the switch N times it will display the content corresponding to No. N. After getting into the check
function, it will display No. N with 1.5s, meanwhile the low bit decimal of digit display flashing, indicated to
get into the check function display. After 1.5s, it will display the content corresponding to No. N.

the digital display tube will display the follow procedure when push SW1 each time.
N Display Remark
00 Normal display Display running frequency, running state or malfunction code
Actual data*HP*10
If capacity demand code is higher than 99, the digital display
tube will show single digit and tens digit. (For example, the
01 Indoor unit capacity demand code
digital display tube show “5.0”,it means the capacity demand
is 15. the digital display tube show “60”,it means the capacity
demand is 6.0)
02 Amendatory capacity demand code
The frequency after the capacity requirement
03
transfer
04 The frequency after the frequency limit
05 The frequency of sending to 341
If the temp. is lower than 0 degree, the digital display tube will
Indoor unit evaporator outlet temp.(heating T2，
06 show “0”.If the temp. is higher than 70 degree, the digital
cooling T2B)
display tube will show “70”.
07 Condenser pipe temp.(T3) If the temp. is lower than -9 degree, the digital display tube will
show “-9”.If the temp. is higher than 70 degree, the digital
08 Outdoor ambient temp.(T4) display tube will show “70”. If the indoor unit is not connected,
the digital display tube will show: “――”
The display value is between 13~129 degree. If the temp. is
lower than 13 degree, the digital display tube will show “13”.If
the temp. is higher than 99 degree, the digital display tube will
09 Compressor discharge temp.(T5) show single digit and tens digit. (For example, the digital
display tube show “0.5”,it means the compressor discharge
temp. is 105 degree. the digital display tube show “1.6”,it
means the compressor discharge temp. is 116 degree)
10 AD value of current
The display value is hex number.
11 AD value of voltage
12 Indoor unit running mode code Off:0, Fan only 1,Cooling:2, Heating:3
13 Outdoor unit running mode code Off:0, Fan only 1,Cooling:2, Heating:3, Forced cooling:4
Actual data/4.
If the value is higher than 99, the digital display tube will show
14 EXV open angle single digit and tens digit.
For example ,the digital display tube show “2.0”,it means the
EXV open angle is 120×4=480p.)
Frequency limit
Bit7 caused by IGBT
radiator
Frequency limit
Bit6
caused by PFC
Frequency limit The display value is hex
Bit5 number. For example,
caused by T4.
the digital display tube
Frequency limit
Bit4 show 2A,then Bit5=1,
15 Frequency limit symbol caused by T2.
Bit3=1, Bit1=1.
Frequency limit
Bit3 It means frequency limit
caused by T3.
caused by T4,T3 and
Frequency limit current.
Bit2
caused by T5.
Frequency limit
Bit1
caused by current
Frequency limit
Bit0
caused by voltage
16 DC fan motor speed
17 IGBT radiator temp. The display value is between 30~120 degree. If the temp. is

116 Electrical Control System

 Electrical Control Function

lower than 30 degree, the digital display tube will show “30”.If
the temp. is higher than 99 degree, the digital display tube will
show single digit and tens digit. (For example, the digital
display tube show “0.5”,it means the IGBT radiator temp. is
105 degree. the digital display tube show “1.6”,it means the
IGBT radiator temp. is 116 degree)
18 Indoor unit number The indoor unit can communicate with outdoor unit well.
19 Condenser pipe temp. of 1# indoor unit If the temp. is lower than 0 degree, the digital display tube will
20 Condenser pipe temp. of 2# indoor unit show “0”.If the temp. is higher than 70 degree, the digital
display tube will show “70”. If the capacity demand is 0, , the
digital display tube will show “0. If the indoor unit is not
21 Condenser pipe temp. of 3# indoor unit
connected, the digital display tube will show: “――”(heating
T2，cooling T2B)
22 1# Indoor unit capacity demand code Actual data*HP*10
If capacity demand code is higher than 99, the digital display
23 2# Indoor unit capacity demand code tube will show single digit and tens digit. (For example, the
digital display tube show “5.0”,it means the capacity demand
is 15. the digital display tube show “60”,it means the capacity
24 3# Indoor unit capacity demand code demand is 6.0). If the indoor unit is not connected, the digital
display tube will show: “――”

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Troubleshooting

2. Troubleshooting
2.1 Display board
2.1.1 Icon explanation on indoor display board (Super slim cassette).

2.1.2 Icon explanation on indoor display board ( Duct)

PRE-DEF indicator(cooling and heating type)
or fan only indicator(cooling only type)
Timer indicator Alarm indicator
Operation lamp Infrared signal receiver
Temporary button Display digital tube

MANUAL OPERATION TIMER DEF./FAN ALARM

2.1.3 Display board of Ceiling-floor indoor unit

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 Troubleshooting

2.1.4 Icon explanation on indoor display board (Compact cassette).

2.1.5 Icon explanation on indoor display board (Console)

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Troubleshooting

2.2 Indoor unit malfunction

For Console(12K)
NO. Malfunction Running lamp Timer lamp Defrosting lamp
1 Refrigerant Leakage Detection ☆ ☆ ◎
2 Open or short circuit of T1 temperature sensor ☆ X X

3 Open or short circuit of T2 temperature sensor X X ☆

4 Indoor / outdoor units communication error X ☆ X

5 Outdoor fan speed has been out of control X ☆ O

6 Indoor EEPROM malfunction ☆ ☆ X

7 IPM module protection ☆ X ☆

Open or short circuit of T3 or T4 temperature sensor or
8 ☆ ☆ ☆
Outdoor unit EEPROM parameter error
9 Over voltage or over low voltage protection ☆ ☆ O

10 Top temperature protection of compressor ☆ O X

11 Inverter compressor drive protection ☆ ◎ X
12 Indoor fan speed has been out of control. ☆ O ☆

O(light) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)

For Compact cassette(12K):

Defrosting Alarm Timer Display(digital
NO. Malfunction Running lamp
lamp lamp lamp tube)
Open or short circuit of T1 temperature
1 X X ☆ X E0
sensor
Open or short circuit of T2 temperature
2 ☆ X X X E1
sensor
3 Indoor / outdoor units communication error X X X ☆ E2

4 Full-water malfunction X ☆ X X E3

5 Indoor EEPROM malfunction X X ☆ ☆ E4

6 IPM module protection X O ☆ X E5

Open or short circuit of T3 or T4 temperature
7 sensor or Outdoor unit EEPROM parameter X X ☆ O E6
error
8 Outdoor fan speed has been out of control ☆ X ☆ O E7

9 Refrigerant Leakage Detection ☆ ☆ O X EC

10 Over voltage or over low voltage protection X O ☆ O P0

11 Top temperature protection of compressor O X ☆ X P1

12 Outdoor current protection ☆ X ☆ ☆ P2

13 Inverter compressor drive error X ◎ X X P4

14 Indoor fan Speed has been out of control. O X ☆ O F5

O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)

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For other models:

Defrosting Alarm Timer Display(digital
NO. Malfunction Running lamp
lamp lamp lamp tube)
1 Indoor / outdoor units communication error X X X ☆ E1
Open or short circuit of T1 temperature
2 X X ☆ X E2
sensor
Open or short circuit of T2 temperature
3 X X ☆ X E3
sensor
Open or short circuit of T2B temperature
4 X X ☆ X E4
sensor
5 Indoor EEPROM malfunction ☆ X X X E7

6 Indoor fan speed is out of control ☆ ☆ X X E8

7 Refrigerant Leakage Detection ☆ ☆ O X EC

8 Outdoor unit malfunction X ◎ X X Ed

9 Full-water malfunction X ☆ X X EE
Communication malfunction between main
10 ☆ ☆ ☆ X F0
PCB and up-down panel PCB
11 Up-down panel malfunction ☆ ☆ X ☆ F1

12 Up-down panel is not closed ☆ ☆ X O F2

Communication malfunction between master
13 X ☆ X ☆ F3
unit and slave unit
14 Other malfunction of master unit or slave unit X ☆ ☆ X F4

O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)

F0,F1,F2 are only available for super-slim cassette
F3,F4 are only available for the unit with TWINS function
Note: Digital display is only available for super slim cassette & duct type.

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2.3 Outdoor unit malfunction

18~36k
Display Malfunction or Protection

E0 Outdoor EEPROM malfunction

E2 Indoor / outdoor units communication error

E3 Communication malfunction between IPM board and outdoor main board

E4 Open or short circuit of T3 or T4 temperature sensor

E5 Voltage protection of compressor

E6 PFC module protection (For 36K 1-Phase models)

E8 Outdoor fan speed is out of control

P0 Top temperature protection of compressor

P1 High pressure protection (For 36k models)

P2 Low pressure protection(For 36k models)

P3 Current protection of compressor

P4 Discharge temperature protection of compressor

P5 High temperature protection of condenser

P6 IPM module protection

P7 High temperature protection of evaporator

In low ambient cooling mode, the LED displays“LC” or alternative displays between running frequency
and “LC”(each displays 0.5s)

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2.4 Solving steps for typical malfunction

2.4.1 For the indoor unit
2.4.1.1 Open or short circuit of temperature sensor

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2.4.1.2. Outdoor unit malfunction

124 Electrical Control System

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2.4.1.3. Indoor EEPROM malfunction

2.4.1.4. Full-water malfunction

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2.4.1.5. Indoor fan speed has been out of control.

Index 1:
1.Indoor DC fan motor(control chip is inside fan motor)
Measure the resistance value of each winding by using the tester. If any resistance value is zero, the fan
motor must have problems and need to be replaced.
For other models:

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NO. Color
1 Red
2 ---
3 Black
4 White
5 Yellow
6 Blue

For console:
5
4
6

1 3
2
NO. Color
1 Red
2 ---
3 White
4 Blue
5 Yellow
6 Black

2.Indoor DC Fan Motor(control chip is in outdoor PCB)

NO. 1 2 3 4 5
Color Orange Grey White Pink Black
Signal Hu Hv Hw Vcc GND

Color Red Blue Yellow

Signal W V U
1) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to

each other, the fan motor must has problems and need to be replaced. Otherwise, go to step 2.

2) Power on and when the unit is in standby, measure the voltage of pin4-5 in feedback signal connector. If

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the value is not 5V, change the PCB. Otherwise, go to step 3.

3) Rotate the fan by hand, measure the voltage of pin1-5, pin 2-5 and pin 3-5 in feedback signal connector.

If any voltage is not positive voltage fluctuation, the fan motor must has problems and need to be

replaced.

Index2:
1. Indoor DC fan motor(control chip is inside fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor
connector. If the value of the voltage is not in the range showing in below table, the PCB must have
problems and need to be replaced.
For other models:

DC motor voltage input and output

NO. Color Signal Voltage
1 Red Vs/Vm 192V~380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 13.5-16.5V
5 Yellow Vsp 0~6.5V
6 Blue FG 15V
For console:
5
4
6

1 3
2

DC motor voltage input and output

NO. Color Signal Voltage
1 Red VDC 310V
2 --- --- ---
3 White Vcc 15V
4 Blue FG 15V
5 Yellow Vsp 0-7.5V
6 Black GND 0V

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2.4.1.6. Refrigerant Leakage Detection

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2.4.3 For the unit with TWINS function(For the super-slim cassette & duct)
2.4.3.1 Communication malfunction between master unit and indoor unit

2.4.3.2 Other malfunction between master unit and indoor unit

One indoor unit displays ”F4”, which means another indoor unit is faulty. Check another indoor unit’s error
code and then follow the appropriate solutions to solve the malfunction.

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2.4.4 For the outdoor unit

2.4.4.1. E0 malfunction
E0 display

Outdoor EEPROM malfunction

Yes

If the EEPROM chip

is welded on PCB,
replace the PCB
directly. Otherwise, No Insert the EEPROM well
check whether the
EEPROM chip
plugged in PCB well?

Yes

Replace the outdoor main board

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2.4.4.2. E2 malfunction
E2 display

Indoor / outdoor units communication error

Power off, then turn on the unit 5

seconds later(reconnect the power
wire).Is the error still displaying
after several minutes?

Yes

Check whether there’s any

interference. Remove interference.
Such as too many lamps, power Yes Increase the capacity of anti-
transformers? Or the signal wire interference
is too long?

No

Check whether the signal wire

Adopt shield cable/Shield
is shield cable or whether the No
cable earthing.
shield cable is earthing?

Yes

Check whether the wire is

correct polarity? P to P, Q to Q, No Correct the connection.
E to E?

Yes

Check whether the signal wire

Yes Replace the signal wire.
is broken?

No

Check whether the signal wires

No Pull out and insert back.
insert on PCB well?

Yes

Replace indoor PCB, is the error

distinguished?

No

Replace the outdoor PCB.

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2.4.4.3. E3 malfunction

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2.4.4.4. E4 malfunction

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2.4.4.5. E5 malfunction (For single phase models)

E5 display

Voltage protection

Check the voltage of

outdoor unit power supply,
whether the voltage No Check the power supply
between L(1) and N is about
220~240VAC

Yes

Replace the power board,

then check whether the
system can run normally

No

Check whether the voltage

of IPM board P and N is
normal? DC277-356V for
18K/24K/30KBtu/h; DC277-
410V for 36K/48KBtu/h
Yes
No

Replace bridge rectifiers,

and then check whether the Yes
system can run normally
Yes

No

Replace IPM board, and

then check whether the Yes
system can run normally

No

Replace outdoor main board Trouble is solved

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2.4.4.6. E5 malfunction (For three phases models)

E5 display

Voltage protection

Check whether the voltage

range of P-N on IPM module is
normal? DC277-356V for 18K/ No Check the power supply
24KBtu/h; DC277-410V for
36KBtu/h

Yes

Replace the power board,

then check whether the
system can run normally

No

Check whether the voltage

range of P-N on IPM module is
normal? DC 350-650V

No Yes

Replace bridge rectifiers,

and then check whether the Yes
system can run normally
Yes

No

Replace IPM board, and

then check whether the Yes
system can run normally

No

Replace outdoor main board Trouble is solved

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2.4.4.7. E6 malfunction (For 36K 1-phase models)

E6 display

PFC module protection

Check whether the

connecting line between Connect it tightly, check
No
main board and the PFC normal or not
module is connected tightly

Yes
No

Check whether the voltage

range of P-N on IPM
Yes Replace the outdoor main board Yes
module is normal? DC277-
410V

No

Check whether the

inductance of PFC module
is good? If the inductance is No Replace the inductance
good, the resistance of the
two ports is 0

Yes

Replace the PFC module Trouble is solved

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2.4.4.8. E8 malfunction

DC motor voltage input and output

NO. Color Signal Voltage
1 Red Vs/Vm 140～380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 13.5~16.5V
5 Yellow Vsp 0~6.5V
6 Blue FG 15V

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2.4.4.8. P0 malfunction

Electrical Control System 139

Troubleshooting

2.4.4.9. P1 malfunction (For 36k models)

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2.4.4.10. P2 malfunction (For 36k models)

Electrical Control System 141

Troubleshooting

2.4.4.11. P3 malfunction

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2.4.4.12. P4 malfunction
When compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when
compressor discharge temperature is lower than 90°C.
P4 display

Temperature protection of
compressor discharge

Check whether the

Check whether the
compressor discharge temp. Yes Yes Stop leaking and add refrigerant
refrigerant is leak
is more than 115°C ?

No

Check whether the wiring

connection is right between
compressor discharge temp. No Correct the wiring connection
sensor and PCB according
to wiring diagrams?

Yes

Judge: The
discharge temp.
sensor is broken

Method: Check whether the

resistance of compressor
No Replace the compressor discharge temp. sensor
discharge temp. sensor is
right refer to the Appendix 2

Yes

Replace outdoor main board Trouble is solved

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Troubleshooting

2.4.4.13. P5 malfunction
When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe
temp. less than 52°C.

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2.4.4.14. P6 malfunction (For single phase models)

At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or
close to 0, the IPM is defective. Otherwise, please follow the procedure below:

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Troubleshooting

2.4.4.15. P6 malfunction (For three phases models)

At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or
close to 0, the IPM is defective. Otherwise, please follow the procedure below:
P6 display

IPM module protection

Check whether the Regulate it to correct,

Check whether the voltage
input power supply is then check whether the
range of P-N on IPM module is No No
correct? 380-415V, 3N, system can work
normal? DC 350-650V
50Hz normally?

Yes

Yes No

Check whether the

connecting line between main Connect it tightly,
No
board and the IPM module is check ok or not? Check whether the
Connect it correctly
connected tightly power supply line is
No and tightly, check ok
connected correctly
or not?
and tightly

Yes
No Yes No

Check whether the

connecting line of the Connect it well,
No
compressor is connected check ok or not?
Check whether the
correctly or tightly Connect it tightly,
lines in E-part box are No
check ok or not?
connected tightly

Yes
No

Yes No
Replace the IPM module,
check whether the system
can work normally? Check whether the bridge rectifiers
are normal? Use the multimeter to
measure the resistance between
each two terminals, check whether
there is the condition that value of
No resistance is 0
Yes No

Replace the main board;

Yes
check whether the system Yes Replace the bridge rectifiers
can work normally?

Check whether the 3300µF/400V

electrolytic capacitor is normal?

No
No

Replace the compressor, Replace this electrolytic

check whether the system Yes capacitor
can work normally?

Trouble is solved
Yes

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2.4.4.16. P7 malfunction
P7 display

High temperature protection of

evaporator

Whether the
Whether compressor
No connection is No Reconnect and retest
operates?
good?

Yes Yes

Check whether the heat Check the

exchanger is dirty, the air- resistance value of
outlet is blocked and the the sensor via No Replace the temperature sensor
indoor fan is running Appendix 1,Is it
normal? normal?

No
Yes
Clean the heat exchanger and
the air-outlet

Whether the indoor

No Replace the indoor PCB
PCB is normal?
Check whether the
indoor fan is running
normal

No

Check refrigerant system

(such as clogging of
capillary etc.)

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Troubleshooting

Appendix 1 Temperature Sensor Resistance Value Table (℃--K)

℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm
-20 115.266 20 12.6431 60 2.35774 100 0.62973
-19 108.146 21 12.0561 61 2.27249 101 0.61148
-18 101.517 22 11.5000 62 2.19073 102 0.59386
-17 96.3423 23 10.9731 63 2.11241 103 0.57683
-16 89.5865 24 10.4736 64 2.03732 104 0.56038
-15 84.2190 25 10.000 65 1.96532 105 0.54448
-14 79.3110 26 9.55074 66 1.89627 106 0.52912
-13 74.5360 27 9.12445 67 1.83003 107 0.51426
-12 70.1698 28 8.71983 68 1.76647 108 0.49989
-11 66.0898 29 8.33566 69 1.70547 109 0.48600
-10 62.2756 30 7.97078 70 1.64691 110 0.47256
-9 58.7079 31 7.62411 71 1.59068 111 0.45957
-8 56.3694 32 7.29464 72 1.53668 112 0.44699
-7 52.2438 33 6.98142 73 1.48481 113 0.43482
-6 49.3161 34 6.68355 74 1.43498 114 0.42304
-5 46.5725 35 6.40021 75 1.38703 115 0.41164
-4 44.0000 36 6.13059 76 1.34105 116 0.40060
-3 41.5878 37 5.87359 77 1.29078 117 0.38991
-2 39.8239 38 5.62961 78 1.25423 118 0.37956
-1 37.1988 39 5.39689 79 1.21330 119 0.36954
0 35.2024 40 5.17519 80 1.17393 120 0.35982
1 33.3269 41 4.96392 81 1.13604 121 0.35042
2 31.5635 42 4.76253 82 1.09958 122 0.3413
3 29.9058 43 4.57050 83 1.06448 123 0.33246
4 28.3459 44 4.38736 84 1.03069 124 0.32390
5 26.8778 45 4.21263 85 0.99815 125 0.31559
6 25.4954 46 4.04589 86 0.96681 126 0.30754
7 24.1932 47 3.88673 87 0.93662 127 0.29974
8 22.5662 48 3.73476 88 0.90753 128 0.29216
9 21.8094 49 3.58962 89 0.87950 129 0.28482
10 20.7184 50 3.45097 90 0.85248 130 0.27770
11 19.6891 51 3.31847 91 0.82643 131 0.27078
12 18.7177 52 3.19183 92 0.80132 132 0.26408
13 17.8005 53 3.07075 93 0.77709 133 0.25757
14 16.9341 54 2.95896 94 0.75373 134 0.25125
15 16.1156 55 2.84421 95 0.73119 135 0.24512
16 15.3418 56 2.73823 96 0.70944 136 0.23916
17 14.6181 57 2.63682 97 0.68844 137 0.23338
18 13.9180 58 2.53973 98 0.66818 138 0.22776
19 13.2631 59 2.44677 99 0.64862 139 0.22231

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Appendix 2
Unit: ℃---K Discharge temp. sensor table
-20 542.7 20 68.66 60 13.59 100 3.702
-19 511.9 21 65.62 61 13.11 101 3.595
-18 483 22 62.73 62 12.65 102 3.492
-17 455.9 23 59.98 63 12.21 103 3.392
-16 430.5 24 57.37 64 11.79 104 3.296
-15 406.7 25 54.89 65 11.38 105 3.203
-14 384.3 26 52.53 66 10.99 106 3.113
-13 363.3 27 50.28 67 10.61 107 3.025
-12 343.6 28 48.14 68 10.25 108 2.941
-11 325.1 29 46.11 69 9.902 109 2.86
-10 307.7 30 44.17 70 9.569 110 2.781
-9 291.3 31 42.33 71 9.248 111 2.704
-8 275.9 32 40.57 72 8.94 112 2.63
-7 261.4 33 38.89 73 8.643 113 2.559
-6 247.8 34 37.3 74 8.358 114 2.489
-5 234.9 35 35.78 75 8.084 115 2.422
-4 222.8 36 34.32 76 7.82 116 2.357
-3 211.4 37 32.94 77 7.566 117 2.294
-2 200.7 38 31.62 78 7.321 118 2.233
-1 190.5 39 30.36 79 7.086 119 2.174
0 180.9 40 29.15 80 6.859 120 2.117
1 171.9 41 28 81 6.641 121 2.061
2 163.3 42 26.9 82 6.43 122 2.007
3 155.2 43 25.86 83 6.228 123 1.955
4 147.6 44 24.85 84 6.033 124 1.905
5 140.4 45 23.89 85 5.844 125 1.856
6 133.5 46 22.89 86 5.663 126 1.808
7 127.1 47 22.1 87 5.488 127 1.762
8 121 48 21.26 88 5.32 128 1.717
9 115.2 49 20.46 89 5.157 129 1.674
10 109.8 50 19.69 90 5 130 1.632
11 104.6 51 18.96 91 4.849
12 99.69 52 18.26 92 4.703
13 95.05 53 17.58 93 4.562
14 90.66 54 16.94 94 4.426
15 86.49 55 16.32 95 4.294 B(25/50)=3950K
16 82.54 56 15.73 96 4.167
17 78.79 57 15.16 97 4.045 R(90℃)=5KΩ±3%
18 75.24 58 14.62 98 3.927
19 71.86 59 14.09 99 3.812

Electrical Control System 149

Controller

3. Controller
3.1Wireless Remote Controller
3.1.1RG36C2/BGE

150 Electrical Control System

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Electrical Control System 151

Controller

152 Electrical Control System

 Controller

3.2 Wired Remote Controller (for Duct type unit)

3.2.1 KJR-12B

Name and functions of buttons on the wire controller

1. Mode button: When press this button, the operation mode change as the following sequence:
AUTO COOL DRY HEAT FAN

Remark: For the cooling only model, the heating mode is skipped.
2. Timer on button: Press this button, timer on function is active. Then every press, the time increase 0.5h,
after 10h, 1h increasement after each press. If cancel this Function, just set it to "0.0"
3. Timer off button: Press this button, timer off function is active. Then every press, the time increase 0.5h,
after 10h, 1h increasement after each press. If cancel this function, just set it to "0.0" .
4. Follow me button: When under cool, heat and auto mode, press this button, follow me function is active.
Press again, this function is ineffective.
5. Electrical heater button: If press this button in heat mode, electrical heater function become ineffective.
6. Reset button (hidden): Use a 1mm stick to press in the little hole , then the current setting is canceled .
The wire controllers enter into original state.
7. ON/OFF button: When in off state, press this button, the indicator is on, the wire controller enter into on
state, and send setting information to indoor PCB. When in on state, press this button, the indicator is
off, and send instruction. If timer on or timer off has been set, it cancel this setting then send instruction
to stop the machine.

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8. Adjust button: Set indoor temperature up. If press and hold on, it will increase at 1degree per 0.5
second.
9. Adjust button: Set indoor temperature down. if press and hold on, it will decrease at 1degree per 0.5
Second.
10. Swing button: First press, start swing function; second press, stop swing. (Match to some model with
swing function).
11. Economy operation button: press this button, the indoor unit operates in economy mode, press again,
exit this mode (it may be ineffective for some models)
12. Fan speed button: press this button consecutively; the fan speed will circle as follow:

13. Lock button (hidden): When you push the LOCK button, all current settings are locked in and the wire
controller does not accept any operation except that of the LOCK button. Use the lock mode when you
want to prevent setting from being changed accidentally or play fully. Push the LOCK button again when
you want to cancel the LOCK mode.

Name and function of LCD on the wire controller

1. Operation mode indication: When press” MODE” button, the following mode can be selected in circle.
Auto Cool Dry Heat Fan only Auto.
Auto→ Cool→ Dry →Heat→ Fan only →Auto
For cooling only model, heat mode is skipped.
2. Timer: When adjust setting on time or only on time is set, the “ON” is lighted. When adjust setting off
time or only off time is set, the” OFF" is lighted. If on and off timer are both set, the “ON” and “OFF” are
both lighted.
3. Follow me function: There is a temperature sensor inside the wire controller, after setting temperature, it
will compare the two temperatures, and the space of wire controller will be the same as setting
temperature. It is available under cooling, heating, auto mode.
4 ON/OFF indication: When it is on, the icon display, otherwise it is extinguished.
5. Fan speed indication: There are four fan modes: low, middle, high, auto. For some models, no middle
fan then the middle fan is seen as high speed.
6. Lock: When the "LOCK" button is pressed, the icon appears and other buttons is unable, press again,
the icon disappears.
7. Temperature display zone: Generally it displays setting temperature; it can be adjusted by press
temperature button▲and▼ .But in fan mode, no display here.

Remark:

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The wired controller will reset to factory setting with auto mode, auto fan and 24℃ setting temperature when
the air conditioner restarts after power failure.
And this may cause inconsistent displays on the wired controller and on the air conditioner. You need to
readjust the running status through the wired controller.

Installation

Installation Notice:
When the air conditioner needs the constant frequency wire controller, be sure adding a wire joint with 5
terminal named A, B, C, D, E in indoor unit, and fixing an infrared emitter whose anode and cathode
connecting with A and B near the receiver in the indoor unit switch board, then connecting the terminal +5v,
GND, Run in the switch board to C,D,E respectively.

NOTE
●The connecting wire should be a little longer as to take away the switch board easily for maintenance.
●The connecting wire should be a little longer as to take away the controller easily for maintenance.

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Controller

LFIS-B-1401

156 Electrical Control System