Manual No.

'20・SRK-T-320

TECHNICAL MANUAL

INVERTER WALL MOUNTED TYPE

RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)

SRK25ZSP-W
SRK35ZSP-W
SRK45ZSP-W
SRK50ZSP-W
 '20 • SRK-T-320

CONTENTS

1. SPECIFICATIONS .............................................................................................. 3
2. EXTERIOR DIMENSIONS ................................................................................. 8
(1) Indoor units ................................................................................................. 8
(2) Outdoor units .............................................................................................. 9
(3) Wireless remote control ............................................................................ 11
3. ELECTRICAL WIRING .................................................................................... 12
(1) Indoor units ............................................................................................... 12
(2) Outdoor units ............................................................................................ 13
4. NOISE LEVEL .................................................................................................. 15
5. PIPING SYSTEM ............................................................................................. 26
6. RANGE OF USAGE & LIMITATIONS .............................................................. 27
7. CAPACITY TABLES ......................................................................................... 29
8. APPLICATION DATA ....................................................................................... 31
9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .................... 39
(1) Operation control function by wireless remote control ............................... 39
(2) Unit ON/OFF button ................................................................................... 40
(3) Auto restart function .................................................................................. 40
(4) Installing two air-conditioners in the same room ....................................... 40
(5) High power operation ................................................................................ 41
(6) Economy operation .................................................................................... 41
(7) Air flow direction adjustment ..................................................................... 41
(8) Timer operation .......................................................................................... 42
(9) Outline of heating operation ...................................................................... 42
(10) Outline of cooling operation ...................................................................... 44
(11) Outline of automatic operation .................................................................. 44
(12) Protection control function ........................................................................ 45
10. MAINTENANCE DATA ................................................................................... 53
(1) Cautions ..................................................................................................... 53
(2) Items to check before troubleshooting ...................................................... 53
(3) Troubleshooting procedure (If the air-conditioner does not run at all) ........ 53
(4) Troubleshooting procedure (If the air-conditioner runs) .............................. 54
(5) Self-diagnosis table ................................................................................... 55
(6) Service mode (Trouble mode access function) .......................................... 56
(7) Inspection procedures corresponding to detail of trouble ......................... 64

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 '20 • SRK-T-320

(8) Phenomenon observed after short-circuit, wire breakage on sensor ........ 68

(9) Checking the indoor electrical equioment ................................................. 69
(10) How to make sure of wireless remote control ........................................... 70
(11) Outdoor unit inspection points .................................................................. 71
11. TECHNICAL INFORMATION ........................................................................ 74

■How to read the model name

Example: SRK 25 Z SP-W

Series code
Inverter type
Product capacity (Cooling capacity)
25 : 2.5kW
35 : 3.2kW
45 : 4.5kW
50 : 5.0kW

Model name SRK : Wall mounted type

SRC : Outdoor unit

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 '20 • SRK-T-320

1. SPECIFICATIONS
Model SRK25ZSP-W
Model SRK25ZSP-W
Item Indoor unit SRK25ZSP-W Outdoor unit SRC25ZSP-W
Power source 1 Phase, 220 - 240V, 50Hz
Nominal cooling capacity (range) kW 2.5 ( 0.9 (Min.) - 3.1 (Max.))
Nominal heating capacity (range) kW 2.8 ( 1.0 (Min.) - 4.1 (Max.))
Heating capacity (H2) kW -
Cooling 0.710 ( 0.20 - 1.01 )
Power consumption Heating 0.690 ( 0.20 - 1.43 )
kW
Heating (H2) -
Max power consumption 1.65
Cooling 3.6 / 3.4 / 3.3 (220/ 230/ 240 V)
Running current
Heating A 3.5 / 3.4 / 3.2 (220/ 230/ 240 V)
Operation Inrush current, max current 3.6 / 3.4 / 3.3 (220/ 230/ 240 V) Max. 9
data Cooling 90
Power factor %
Heating 89
EER Cooling 3.52
Heating 4.05
COP
Heating (H2) -
Cooling 57 57
Sound power level
Heating 57 56
Cooling dB(A) Hi: 45 Me: 34 Lo: 23 47
Sound pressure level
Heating Hi: 43 Me: 34 Lo: 26 45
Silent mode sound pressure level - -
Exterior dimensions (Height x Width x Depth) mm 267 × 783 × 210 540 × 645(+57) × 275
Exterior appearance Fine snow Stucco white
(Equivalent color) Munsell : ( 8.0Y 9.3/0.1 ), RAL : 9003 Munsell : ( 4.2Y 7.5/1.1 ), RAL : 7044
Net weight kg 7.0 26.5
Compressor type & Quantity - RM-C5077SBE7( Rotary type ) x 1
Compressor motor (Starting method) kW - 0.75 ( Inverter driven )
Refrigerant oil (Amount, type) ℓ - 0.3 ( DIAMOND FREEZE MB75 )
Refrigerant (Type, amount, pre-charge length) kg R32 0.550 in outdoor unit (Incl. the amount for the piping of 10m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Quantity Tangential fan × 1 Propeller fan × 1
Fan motor (Starting method) W 30 × 1 (Direct drive) 24 × 1 (Direct drive)
Cooling 3 Hi: 10.0 Me: 7.3 Lo: 4.2 23.7
Air flow m /min
Heating Hi: 9.5 Me: 7.3 Lo: 5.2 19.7
Available external static pressure Pa 0 0
Outside air intake Not possible -
Air filter, Quality / Quantity Polypropylene net ( Washable ) -
Shock & vibration absorber Rubber sleeve (for fan motor) Rubber sleeve (for fan motor & compressor)
Electric heater - -
Remote control Wireless remote control
Operation
Room temperature control Microcomputer thermostat
control
Operation display RUN: Green , TIMER: Yellow
Compressor overheat protection, Overcurrent protection,
Safety equipments Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Refrigerant piping size ( O.D ) mm Liquid line: φ 6.35 ( 1/4" ) Gas line: φ 9.52 ( 3/8" )
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.46 / Gas line : 0.39 -
Installation
Insulation for piping Necessary ( Both sides ), independent
data
Refrigerant line (one way) length m Max.15
Vertical height diff. between O.U. and I.U. m Max.10 ( Outdoor unit is higher ) / Max.10 ( Outdoor unit is lower )
Drain hose Hose connectable ( VP16 ) Hole φ 20 x 2 pcs.
Drain pump, max lift height mm - -
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 3.6 / 3.4 / 3.3 (220/ 230/ 240 V)
Interconnecting wires Size x Core number 1.5mm2 × 4 cores ( Including earth cable ) / Terminal block ( Screw fixing type )
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts -
Notes ( 1) The data are measured at the following conditions. The pipe length is 5m.
Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27℃ 19℃ 35℃ 24℃ ISO5151-T1
Heating 20℃ - 7℃ 6℃ ISO5151-H1
Heating (H2) 20℃ - 2℃ 1℃ ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat higher due to ambient
conditions.
(4) Select the breaker size according to the own national standard.

RWA000Z275 B
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 '20 • SRK-T-320

Model SRK35ZSP-W
Model SRK35ZSP-W
Item Indoor unit SRK35ZSP-W Outdoor unit SRC35ZSP-W
Power source 1 Phase, 220 - 240V, 50Hz
Nominal cooling capacity (range) kW 3.2 ( 0.9 (Min.) - 3.7 (Max.))
Nominal heating capacity (range) kW 3.6 ( 1.0 (Min.) - 4.6 (Max.))
Heating capacity (H2) kW -
Cooling 0.910 ( 0.20 - 1.32 )
Power consumption Heating 0.930 ( 0.20 - 1.43 )
kW
Heating (H2) -
Max power consumption 1.65
Cooling 4.4 / 4.3 / 4.1 (220/ 230/ 240 V)
Running current
Heating A 4.5 / 4.3 / 4.2 (220/ 230/ 240 V)
Operation Inrush current, max current 4.5 / 4.3 / 4.2 (220/ 230/ 240 V) Max. 9
data Cooling 93
Power factor %
Heating 93
EER Cooling 3.52
Heating 3.87
COP
Heating (H2) -
Cooling 58 59
Sound power level
Heating 58 60
Cooling dB(A) Hi: 45 Me: 36 Lo: 23 48
Sound pressure level
Heating Hi: 44 Me: 36 Lo: 28 48
Silent mode sound pressure level - -
Exterior dimensions (Height x Width x Depth) mm 267 x 783 x 210 540 x 645(+57) x 275
Exterior appearance Fine snow Stucco white
(Equivalent color) Munsell ： ( 8.0Y 9.3/0.1 ), RAL ： 9003 Munsell ： ( 4.2Y 7.5/1.1 ), RAL ： 7044
Net weight kg 7.0 28.5
Compressor type & Quantity - RM-C5077SBE7( Rotary type ) x 1
Compressor motor (Starting method) kW - 0.75 ( Inverter driven )
Refrigerant oil (Amount, type) ℓ - 0.3 ( DIAMOND FREEZE MB75 )
Refrigerant (Type, amount, pre-charge length) kg R32 0.68 in outdoor unit (Incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Quantity Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Cooling Hi: 9.5 Me: 6.8 Lo: 4.2 22.8
Air flow m3/min
Heating Hi: 9.6 Me: 7.4 Lo: 5.5 22.0
Available external static pressure Pa 0 0
Outside air intake Not possible -
Air filter, Quality / Quantity Polypropylene net ( Washable ) -
Shock & vibration absorber Rubber sleeve (for fan motor) Rubber sleeve (for fan motor & compressor)
Electric heater - -
Remote control Wireless remote control
Operation
Room temperature control Microcomputer thermostat
control
Operation display RUN: Green , TIMER: Yellow
Compressor overheat protection, Overcurrent protection,
Safety equipments Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Refrigerant piping size ( O.D ) mm Liquid line: φ 6.35 ( 1/4" ) Gas line: φ 9.52 ( 3/8" )
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.46 / Gas line : 0.39 -
Installation
Insulation for piping Necessary ( Both sides ), independent
data
Refrigerant line (one way) length m Max.15
Vertical height diff. between O.U. and I.U. m Max.10 ( Outdoor unit is higher ) / Max.10 ( Outdoor unit is lower )
Drain hose Hose connectable ( VP16 ) Hole φ 20 x 2 pcs.
Drain pump, max lift height mm - -
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 4.5 / 4.3 / 4.2 (220/ 230/ 240 V)
Interconnecting wires Size x Core number 1.5mm2 × 4 cores ( Including earth cable ) / Terminal block ( Screw fixing type )
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts -
Notes ( 1) The data are measured at the following conditions. The pipe length is 5m.
Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27℃ 19℃ 35℃ 24℃ ISO5151-T1
Heating 20℃ - 7℃ 6℃ ISO5151-H1
Heating (H2) 20℃ - 2℃ 1℃ ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat higher due to ambient
conditions.
(4) Select the breaker size according to the own national standard.

RWA000Z275 B
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 '20 • SRK-T-320

Model SRK45ZSP-W
Model SRK45ZSP-W
Item Indoor unit SRK45ZSP-W Outdoor unit SRC45ZSP-W
Power source 1 Phase, 220 - 240V, 50Hz
Nominal cooling capacity (range) kW 4.5 ( 1.3 (Min.) - 4.8 (Max.))
Nominal heating capacity (range) kW 5.0 ( 1.2 (Min.) - 5.8 (Max.))
Heating capacity (H2) kW -
Cooling 1.350 ( 0.29 - 1.71 )
Power consumption Heating 1.360 ( 0.27 - 1.84 )
kW
Heating (H2) -
Max power consumption 2.68
Cooling 6.3 / 6.1 / 5.8 (220/ 230/ 240 V)
Running current
Heating A 6.4 / 6.1 / 5.8 (220/ 230/ 240 V)
Operation Inrush current, max current 6.4 / 6.1 / 5.8 (220/ 230/ 240 V) Max. 14.5
data Cooling 97
Power factor %
Heating 97
EER Cooling 3.33
Heating 3.68
COP
Heating (H2) -
Cooling 56 63
Sound power level
Heating 62 64
Cooling dB(A) Hi: 44 Me: 39 Lo: 24 51
Sound pressure level
Heating Hi: 48 Me: 41 Lo: 30 51
Silent mode sound pressure level - -
Exterior dimensions (Height x Width x Depth) mm 267 x 783 x 210 595 x 780(+62) x 290
Exterior appearance Fine snow Stucco white
(Equivalent color) Munsell ： ( 8.0Y 9.3/0.1 ), RAL ： 9003 Munsell ： ( 4.2Y 7.5/1.1 ), RAL ： 7044
Net weight kg 7.5 36.0
Compressor type & Quantity - 9RS102XDA21( Rotary type ) x 1
Compressor motor (Starting method) kW - 1.50 ( Inverter driven )
Refrigerant oil (Amount, type) ℓ - 0.32 ( FW50S )
Refrigerant (Type, amount, pre-charge length) kg R32 1.10 in outdoor unit (Incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Quantity Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 × 1 (Direct drive) 24 × 1 (Direct drive)
Cooling Hi: 9.0 Me: 7.2 Lo: 3.8 35.6
Air flow m3/min
Heating Hi: 12.0 Me: 9.2 Lo: 6.2 33.4
Available external static pressure Pa 0 0
Outside air intake Not possible -
Air filter, Quality / Quantity Polypropylene net ( Washable ) -
Shock & vibration absorber Rubber sleeve (for fan motor) Rubber sleeve (for fan motor & compressor)
Electric heater - -
Remote control Wireless remote control
Operation
Room temperature control Microcomputer thermostat
control
Operation display RUN: Green , TIMER: Yellow
Compressor overheat protection, Overcurrent protection,
Safety equipments Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Refrigerant piping size ( O.D ) mm Liquid line: φ 6.35 ( 1/4" ) Gas line: φ 12.7 ( 1/2” )
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.46 / Gas line : 0.39 -
Installation
Insulation for piping Necessary ( Both sides ), independent
data
Refrigerant line (one way) length m Max.25
Vertical height diff. between O.U. and I.U. m Max.15 ( Outdoor unit is higher ) / Max.15 ( Outdoor unit is lower )
Drain hose Hose connectable ( VP16 ) Hole φ 20 x 2 pcs.
Drain pump, max lift height mm - -
Recommended breaker size A 20
L.R.A. (Locked rotor ampere) A 6.4 / 6.1 / 5.8 (220/ 230/ 240 V)
Interconnecting wires Size x Core number 1.5mm2 × 4 cores ( Including earth cable ) / Terminal block ( Screw fixing type )
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts -
Notes ( 1) The data are measured at the following conditions. The pipe length is 5m.
Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27℃ 19℃ 35℃ 24℃ ISO5151-T1
Heating 20℃ - 7℃ 6℃ ISO5151-H1
Heating (H2) 20℃ - 2℃ 1℃ ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat higher due to ambient
conditions.
(4) Select the breaker size according to the own national standard.

RWA000Z275 B
- 5-
 '20 • SRK-T-320

Model SRK50ZSP-W
Model SRK50ZSP-W
Item Indoor unit SRK50ZSP-W Outdoor unit SRC50ZSP-W
Power source 1 Phase, 220 - 240V, 50Hz
Nominal cooling capacity (range) kW 5.0 ( 1.3 (Min.) - 5.2 (Max.))
Nominal heating capacity (range) kW 5.6 ( 1.2 (Min.) - 5.8 (Max.))
Heating capacity (H2) kW -
Cooling 1.740 ( 0.29 - 1.86 )
Power consumption Heating 1.660 ( 0.27 - 1.84 )
kW
Heating (H2) -
Max power consumption 2.68
Cooling 7.9 / 7.6 / 7.3 (220/ 230/ 240 V)
Running current
Heating A 7.6 / 7.3 / 7.0 (220/ 230/ 240 V)
Operation Inrush current, max current 7.9 / 7.6 / 7.3 (220/ 230/ 240 V) Max. 14.5
data Cooling 99
Power factor %
Heating 99
EER Cooling 2.87
Heating 3.37
COP
Heating (H2) -
Cooling 59 65
Sound power level
Heating 63 66
Cooling dB(A) Hi: 46 Me: 39 Lo: 24 52
Sound pressure level
Heating Hi: 48 Me: 41 Lo: 30 52
Silent mode sound pressure level - -
Exterior dimensions (Height x Width x Depth) mm 267 x 783 x 210 595 x 780(+62) x 290
Exterior appearance Fine snow Stucco white
(Equivalent color) Munsell ： ( 8.0Y 9.3/0.1 ), RAL ： 9003 Munsell ： ( 4.2Y 7.5/1.1 ), RAL ： 7044
Net weight kg 7.5 36.0
Compressor type & Quantity - 9RS102XDA21( Rotary type ) x 1
Compressor motor (Starting method) kW - 1.50 ( Inverter driven )
Refrigerant oil (Amount, type) ℓ - 0.32 ( FW50S )
Refrigerant (Type, amount, pre-charge length) kg R32 1.10 in outdoor unit (Incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Quantity Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 × 1 (Direct drive) 24 × 1 (Direct drive)
Cooling Hi: 9.9 Me: 7.2 Lo: 3.8 37.7
Air flow m3/min
Heating Hi: 12.0 Me: 9.2 Lo: 6.2 35.6
Available external static pressure Pa 0 0
Outside air intake Not possible -
Air filter, Quality / Quantity Polypropylene net ( Washable ) -
Shock & vibration absorber Rubber sleeve (for fan motor) Rubber sleeve (for fan motor & compressor)
Electric heater - -
Remote control Wireless remote control
Operation
Room temperature control Microcomputer thermostat
control
Operation display RUN: Green , TIMER: Yellow
Compressor overheat protection, Overcurrent protection,
Safety equipments Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Refrigerant piping size ( O.D ) mm Liquid line: φ 6.35 ( 1/4" ) Gas line: φ 12.7 ( 1/2” )
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.46 / Gas line : 0.39 -
Installation
Insulation for piping Necessary ( Both sides ), independent
data
Refrigerant line (one way) length m Max.25
Vertical height diff. between O.U. and I.U. m Max.15 ( Outdoor unit is higher ) / Max.15 ( Outdoor unit is lower )
Drain hose Hose connectable ( VP16 ) Hole φ 20 x 2 pcs.
Drain pump, max lift height mm - -
Recommended breaker size A 20
L.R.A. (Locked rotor ampere) A 7.9 / 7.6 / 7.3 (220/ 230/ 240 V)
Interconnecting wires Size x Core number 1.5mm2 × 4 cores ( Including earth cable ) / Terminal block ( Screw fixing type )
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts -
Notes ( 1) The data are measured at the following conditions. The pipe length is 5m.
Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27℃ 19℃ 35℃ 24℃ ISO5151-T1
Heating 20℃ - 7℃ 6℃ ISO5151-H1
Heating (H2) 20℃ - 2℃ 1℃ ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat higher due to ambient
conditions.
(4) Select the breaker size according to the own national standard.

RWA000Z275 C
- 6-
 '20 • SRK-T-320

Weight list (Package)

【Indoor unit & outdoor unit】 Unit : kg

Material
Packing Foam
Gross Alumi-
parts Paper poly- Plastic Steel Wood Glass Others
weight nium
weight styrene
Model

SRK25ZSP-W 9.0 0.94 0.64 0.24 0.06 0.00 0.00 0.00 0.00 0.00
SRK35ZSP-W 9.0 0.94 0.64 0.24 0.06 0.00 0.00 0.00 0.00 0.00
Indoor
SRK45ZSP-W 9.5 0.94 0.64 0.24 0.06 0.00 0.00 0.00 0.00 0.00
SRK50ZSP-W 9.5 0.94 0.64 0.24 0.06 0.00 0.00 0.00 0.00 0.00
SRC25ZSP-W 28.0 1.64 1.36 0.24 0.04 0.00 0.00 0.00 0.00 0.00
SRC35ZSP-W 30.0 1.64 1.36 0.24 0.04 0.00 0.00 0.00 0.00 0.00
Outdoor
SRC45ZSP-W 38.0 2.13 1.78 0.27 0.08 0.00 0.00 0.00 0.00 0.00
SRC50ZSP-W 38.0 2.13 1.78 0.27 0.08 0.00 0.00 0.00 0.00 0.00

- 7-
 25 60 60 39
Symbol Content
G G SRK25,35 φ9.52（3／8"）
（Flare）
A Gas piping
SRK45,50 φ12.7（1／2"）
（Flare）
B Liquid piping φ6.35（1／4"）
（Flare）
(1) Indoor units

45
45
C Hole on wall for right rear piping （φ65）
D Hole on wall for left rear piping （φ65）
E Drain hose VP16
F Outlet for wiring
783 210 3 G Outlet for piping（on both side）

267
G
2. EXTERIOR DIMENSIONS

55

-
16
Outlet for downward piping Terminal block 45
F

8-
（Refer to the top view）
Installation board Wireless remote control
Models SRK25ZSP-W, 35ZSP-W, 45ZSP-W, 50ZSP-W

（Service space）50 130.5 508 144.5 100 （Service space）

157 455 171 Service space 65
※
150

187.5 394 201.5 Recommendation 80

Unit

12.3
60 17

44.6
Note（1）The model name label is attached
on the underside of the indoor unit.

190
247.3
47

47
Unit:mm

6.9
D 55 E B A 69 C
443.5
511.5
15（Service space）

546
Space for installation and service when viewing from the front

RLC000Z106
'20 • SRK-T-320
 Notes
Symbol Content （1）The unit must not be surrounded by walls on the four sides.
A Service valve connection（gas side） φ9.52（3／8"）
（Flare） （2）The unit must be fixed with anchor bolts.
B Service valve connection（liquid side） φ6.35（1／4"）
（Flare） An anchor bolt must not protrude more than 15mm.
（3）If the unit is installed in the location where there is a possibility of strong winds,
C Pipe／cable draw-out hole
place the unit such that the direction of air from the outlet gets perpendicular to
D Drain discharge hole φ20 × 2 places
the wind direction.
E Anchor bolt hole M10-12 × 4 places （4）Leave 200mm or more space above the unit.
（5）The wall height on the outlet side should be 1200mm or less.
(2) Outdoor units

（6）The model name label is attached on the lower right corner of the front panel.
※1
Center of gravity
40
14.6 322 12

E D E

16.8
2-R

50
Inlet L3
Models SRC25ZSP-W, 35ZSP-W

L2 L4

275
336
( Service
space )

304.4
Inlet

※3

135
（※5）
Dimensions
※1 ※2 ※3 ※4 ※5 Outlet L1
Model

12

-
15.7
2-12X16

14.8
120.5 Slot hole （※4） SRC25ZSP-W 200 240 115 109.5 130.7

9-
74.5 480 90.5 20.2
645 57.2 SRC35ZSP-W 215 240 140 124.5 155.7
Installation space（mm）
L1 280 or more
L2 100 or more
L3 80 or more
L4 250 or more
Terminal block

540
Unit:mm
B
20°

43.2
20°

※2

16.5
86.3
A

Center of gravity 147.2

RCW000Z007
'20 • SRK-T-320
 Notes
Symbol Content （1）The unit must not be surrounded by walls on the four sides.
A Service valve connection（gas side） φ12.7（1／2"）
（Flare） （2）The unit must be fixed with anchor bolts.
B Service valve connection（liquid side） φ6.35（1／4"）
（Flare） An anchor bolt must not protrude more than 15mm.
（3）If the unit is installed in the location where there is a possibility of strong winds,
C Pipe／cable draw-out hole
place the unit such that the direction of air from the outlet gets perpendicular to
D Drain discharge hole φ20 × 2 places
the wind direction.
E Anchor bolt hole M10-12 × 4 places （4）Leave 200mm or more space above the unit.
（5）The wall height on the outlet side should be 1200mm or less.
Center of gravity
（6）The model name label is attached on the right side of the unit.
270
50.6
14.6 390.6 12
E D E

24.3
2-R

63.4
L3
Models SRC45ZSP-W, 50ZSP-W

Inlet
L2 L4

290
( Service
space )

312.5
351.6
Inlet

145
（161.4）
Outlet L1

-
20
69.4
390.6

14.8

16.4
2-12X16

10 -
Slot hole （111.6）
111.6 510 158.4 17.9
780 61.9 Installation space（mm）
L1 280 or more
L2 100 or more
L3 80 or more
Terminal block L4 250 or more

595
B Unit:mm
40°

42.5
40°

275

15.8
97.7
A

Center of gravity 138.4 33.5

RCV000Z038
'20 • SRK-T-320
 '20 • SRK-T-320

(3) Wireless remote control

Unit: mm

150

60 17

- 11 -
 FLAP INDOOR
MOTOR FAN MOTOR Meaning of marks
M M Item Description
CNE Connector
BOX, CNF

5
CONTROL CNG
CNM
(1) Indoor units

CNU

RED
BLACK
WHITE
YELLOW
BLUE
CNM 1 3 4 5 6
CNU G YELLOW／GREEN
DIODE
STACK
S／N WHITE
VARISTOR

U
3. ELECTRICAL WIRING

FUSE L BLACK
250V 3.15A

TO HEAT EXCHANGER

-
PCB ASSY
J RED

12 -
Models SRK25ZSP-W, 35ZSP-W, 45ZSP-W, 50ZSP-W

CNE CNG CNF

BLACK
WHITE
RED
YELLOW／GREEN
1 2／N 3

6
2
2
2
TERMINAL
BLOCK
DISPLAY

t°
WIRELESS
R-AMP
BACK UP SW

ROOM TEMPERATURE.
SENSOR
HEAT EXCHANGER
TEMPERATURE SENSOR t°
HUMIDITY
SENSOR
TO OUTDOOR UNIT

RLC000Z107
'20 • SRK-T-320
 Power source
1 Phase
220-240V 50Hz （YELLOW）
（ORANGE） REACTOR

3 PCB ASSY
(2) Outdoor units

T1 T2 POWER
F7 t° TRANSISTOR
TERMINAL F2 U （RED）
T 250V E 15A （BLACK） R.IN U
BLOCK P
TB1 NOISE + + 250V 20A NU V V （WHITE） M
L 1 （WHITE） S.IN FILTER NV 3～
NW W W （BLACK） COMPRESSOR
N 2 MOTOR
（RED） C-2 F3 T 1A L 250V
3 （YELLOW／ PAM

F1
Models SRC25ZSP-W, 35ZSP-W

GREEN） G1 F4 CIRCUIT CNFAN M

250V 2A
（YELLOW／ （YELLOW／
GREEN） 250V 10A FAN MOTOR
GREEN） G2 SWITCHING POWER
4 CIRCUIT
CN20S CNTH CNEEV

TO INDOOR UNIT 2 2 2 2

-
2
POWER CABLE 1 N
SIGNAL WIRE 3 M

13 -
[ EARTH WIRE ] Meaning of marks
Item Description
CN20S Connector
CNEEV
CNFAN

SOLENOID COIL FOR

4-WAY VALVE
HEAT EXCHANGER
TEMPERATURE SENSOR t°
OUTDOOR AIR
TEMPERATURE SENSOR t°
DISCHARGE PIPE
TEMPERATURE SENSOR t°
ELECTRIC EXPANSION
VALVE（COIL）

CNTH

Power cable, indoor-outdoor connecting wires

MAX running current Power cable Power cable length Connecting cable
Model
（A） wire size x number* （m） wire size x number*
25,35 9 2.0mm 2x 3 22 1.5mm 2 x 4

* The wire numbers include Earth wire（Yellow／Green）.

Switchgear or circuit breaker capacity should be chosen according to national or regional electricity
regulations.
The power cable specifications are based on the assumption that a metal or plastic conduit is used
with no more than three cables contained in a conduit and a voltage drop is 2％. For an installation
falling outside of these conditions, please follow the national or regional electricity regulations.

RWC000Z324
'20 • SRK-T-320
 Power source
1 Phase
220-240V 50Hz
220V 60Hz
PCB ASSY PCB1
3
DIODE POWER
STACK1 T1 （YE） （YE） T2
F4 L1 TRANSISTOR
（BK） R.IN ～ ＋
250V 20A NOISE T11 （BL） （BL） T12 U （RD）
FILTER L2 P U
（WH） S.IN
+ + + V （WH） MS
～ － V
（RD） C-2 3～
F8 W （BK）
W
N
250V 20A CM

DIODE PAM PAM

STACK2 CIRCUIT CIRCUIT
F1 F3
TERMINAL （YG） G1 ～ ＋
BLOCK SWITCHING T 1A L 250V
TB1 F 3.15A L 250V POWER
CIRCUIT
Models SRC45ZSP-W, 50ZSP-W

（BK）
L 1 （YG） G2
～ － CNFAN M
（WH）
N 2
FMo
3
（YG） （RD）
CN20S CNTH（BK） CNEEV（WH）

-
4

14 -
TO INDOOR UNIT 2 2 2 2

2
POWER CABLE 1 N M

t゜
t゜
t゜
SIGNAL WIRE 3 20S Meaning of marks
TH1 TH2 TH3 EEV
[ EARTH WIRE ] Item Description
20S 4-way valve（coil）
CN20S Connector
CNEEV
CNFAN
Power cable, indoor-outdoor connecting wires Color marks CNTH
MAX running current Power cable Power cable length Connecting cable Mark Color CM Compressor motor
Model name
（A） wire size x number* （m） wire size x number* BK Black EEV Electric expansion valve（coil）
BL Blue FMo Fan motor
SRC45, 50ZSP-W 14.5 2.5mm 2x 3 17 1.5mm 2x 4
RD Red L1,2 Reactor
WH White TH1 Heat exchanger temperature sensor
* The wire numbers include Earth wire（Yellow／Green）. YE Yellow TH2 Outdoor air temperature sensor
Switchgear or circuit breaker capacity should be chosen according to national or regional electricity
regulations. YG Yellow／Green TH3 Discharge pipe temperature sensor
The power cable specifications are based on the assumption that a metal or plastic conduit is used
with no more than three cables contained in a conduit and a voltage drop is 2％. For an installation
falling outside of these conditions, please follow the national or regional electricity regulations.

RWC000Z325
A
'20 • SRK-T-320
 '20 • SRK-T-320

4. NOISE LEVEL
(1) Sound power level
Model SRK25ZSP-W

(Indoor unit)
Model SRK25ZSP-W Condition ISO5151 T1/H1
Noise Cooling 57 dB(A) MODE Rated capacity value (Hi)
level Heating 57 dB(A)

× ...... Cooling Heating

70.0

60.0
Sound power level (dB)

50.0

40.0

30.0

20.0

10.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC25ZSP-W
Noise Cooling 57 dB(A)
level Heating 56 dB(A)
× ...... Cooling Heating
70.0

60.0
Sound power level (dB)

50.0

40.0

30.0

20.0

10.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 15 -
 '20 • SRK-T-320

Model SRK35ZSP-W
(Indoor unit)
Model SRK35ZSP-W Condition ISO5151 T1/H1
Noise Cooling 58 dB(A) MODE Rated capacity value (Hi)
level Heating 58 dB(A)

× ...... Cooling Heating

70.0

60.0
Sound power level (dB)

50.0

40.0

30.0

20.0

10.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC35ZSP-W
Noise Cooling 59 dB(A)
level Heating 60 dB(A)
× ...... Cooling Heating
70.0

60.0
Sound power level (dB)

50.0

40.0

30.0

20.0

10.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 16 -
 '20 • SRK-T-320

Model SRK45ZSP-W
(Indoor unit)
Model SRK45ZSP-W Condition ISO5151 T1/H1
Noise Cooling 56 dB(A) MODE Rated capacity value (Hi)
level Heating 62 dB(A)

× ...... Cooling Heating

70.0

60.0
Sound power level (dB)

50.0

40.0

30.0

20.0

10.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC45ZSP-W
Noise Cooling 63 dB(A)
level Heating 64 dB(A)
× ...... Cooling Heating
80.0

70.0
Sound power level (dB)

60.0

50.0

40.0

30.0

20.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 17 -
 '20 • SRK-T-320

Model SRK50ZSP-W
(Indoor unit)
Model SRK50ZSP-W Condition ISO5151 T1/H1
Noise Cooling 59 dB(A) MODE Rated capacity value (Hi)
level Heating 63 dB(A)

× ...... Cooling Heating

70.0

60.0
Sound power level (dB)

50.0

40.0

30.0

20.0

10.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC50ZSP-W
Noise Cooling 65 dB(A)
level Heating 66 dB(A)
× ...... Cooling Heating
80.0

70.0
Sound power level (dB)

60.0

50.0

40.0

30.0

20.0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 18 -
 '20 • SRK-T-320

(2) Sound pressure level

(a) Rated capacity value
Condition ISO5151 T1/H1
Model SRK25ZSP-W
MODE Rated capacity value (Hi)
(Indoor unit) Mike position
Model SRK25ZSP-W 1m
Noise Cooling 45 dB(A) 0.8m
Unit
level Heating 43 dB(A) Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
Mike position: at highest
N60 noise level in position as mentioned below
Sound pressure level (dB)

Distance from front side 1m

50 50
(Standard 2×10-5Pa)

N50

40 40
N40
30 30
N30
20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC25ZSP-W ◦ Mike position: at highest noise level in position as
mentioned below
Noise Cooling 47 dB(A)
Distance from front side 1m
level Heating 45 dB(A)
× ...... Cooling Heating
70 70
N70

60 60
N60
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50

40 40
N40

30 30
N30

20 20
N20

10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 19 -
 '20 • SRK-T-320

Condition ISO5151 T1/H1

Model SRK35ZSP-W
MODE Rated capacity value (Hi)
(Indoor unit) Mike position
Model SRK35ZSP-W 1m
Noise Cooling 45 dB(A) 0.8m
Unit
level Heating 44 dB(A) Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
Mike position: at highest
N60 noise level in position as mentioned below
Distance from front side 1m
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50
40 40
N40
30 30
N30
20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC35ZSP-W ◦ Mike position: at highest noise level in position as
mentioned below
Noise Cooling 48 dB(A)
Distance from front side 1m
level Heating 48 dB(A)
× ...... Cooling Heating
70 70
N70

60 60
N60
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50

40 40
N40

30 30
N30

20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 20 -
 '20 • SRK-T-320

Condition ISO5151 T1/H1

Model SRK45ZSP-W
MODE Rated capacity value (Hi)
(Indoor unit) Mike position
Model SRK45ZSP-W 1m
Noise Cooling 44 dB(A) 0.8m
Unit
level Heating 48 dB(A) Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
Mike position: at highest
N60 noise level in position as mentioned below
Distance from front side 1m
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50

40 40
N40
30 30
N30

20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC45ZSP-W ◦ Mike position: at highest noise level in position as
mentioned below
Noise Cooling 51 dB(A)
Distance from front side 1m
level Heating 51 dB(A)
× ...... Cooling Heating
70 70
N70

60 60
N60
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50

40 40
N40

30 30
N30
20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 21 -
 '20 • SRK-T-320

Condition ISO5151 T1/H1

Model SRK50ZSP-W
MODE Rated capacity value (Hi)
(Indoor unit) Mike position
Model SRK50ZSP-W 1m
Noise Cooling 46 dB(A) 0.8m
Unit
level Heating 48 dB(A) Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
Mike position: at highest
N60 noise level in position as mentioned below
Distance from front side 1m
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50

40 40
N40
30 30
N30

20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

(Outdoor unit)
Model SRC50ZSP-W ◦ Mike position: at highest noise level in position as
mentioned below
Noise Cooling 52 dB(A)
Distance from front side 1m
level Heating 52 dB(A)
× ...... Cooling Heating
70 70
N70

60 60
N60
Sound pressure level (dB)

50 50
(Standard 2×10-5Pa)

N50

40 40
N40

30 30
N30
20 20
N20
10 10
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 22 -
 '20 • SRK-T-320

(b) Each fan speed mode Condition ISO5151 T1/H1

MODE Me
(Indoor unit) Mike position
Model SRK25ZSP-W 1m
Noise Cooling 34 dB(A) 0.8m
Unit
level Heating 34 dB(A) Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
N60
Mike position: at highest noise level in position as mentioned below
50 50
Distance from front side 1m
Sound pressure level (dB)

N50
(Standard 2×10-5Pa)

40 40
N40
30 30
N30
20 20
N20
10 10

0 0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)
(Indoor unit) MODE Lo
Model SRK25ZSP-W Mike position
Noise Cooling 23 dB(A) 1m
level Heating 26 dB(A) 0.8m
Unit
Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
N60

50 Mike position: at highest noise50level in position as mentioned below

Sound pressure level (dB)

Distance from front side

N50 1m
(Standard 2×10-5Pa)

40 40
N40

30 30
N30
20 20
N20
10 10

0 0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 23 -
 '20 • SRK-T-320

(Indoor unit) Condition ISO5151 T1/H1

Model SRK35ZSP-W MODE Me
Noise Cooling 36 dB(A) Mike position
level Heating 36 dB(A) 1m
0.8m
Unit
Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
N60
Mike position: at highest noise level in position as mentioned below
50 50
Distance from front side 1m
Sound pressure level (dB)

N50
(Standard 2×10-5Pa)

40 40
N40
30 30
N30
20 20
N20

10 10

0 0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)
(Indoor unit) MODE Lo
Model SRK35ZSP-W Mike position
Noise Cooling 23 dB(A) 1m
level Heating 28 dB(A) 0.8m
Unit
Mike position
(Center & low points)
× ...... Cooling Heating
70 70
N70

60 60
N60

50 Mike position: at highest noise50level in position as mentioned below

Sound pressure level (dB)

Distance from front side

N50 1m
(Standard 2×10-5Pa)

40 40
N40

30 30
N30
20 20
N20

10 10

0 0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 24 -
 '20 • SRK-T-320

(Indoor unit) Condition ISO5151 T1/H1

Model SRK45ZSP-W, 50ZSP-W MODE Me
Noise Cooling 39 dB(A) Mike position
level Heating 41 dB(A) 1m
0.8m
Unit
Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
N60
Mike position: at highest noise level in position as mentioned below
50 50
Distance from front side 1m
Sound pressure level (dB)

N50
(Standard 2×10-5Pa)

40 40
N40
30 30
N30
20 20
N20

10 10

0 0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)
(Indoor unit) MODE Lo
Model SRK45ZSP-W, 50ZSP-W Mike position
Noise Cooling 24 dB(A) 1m
level Heating 30 dB(A) 0.8m
Unit
Mike position
(Center & low points)

× ...... Cooling Heating

70 70
N70

60 60
N60

50 Mike position: at highest noise50level in position as mentioned below

Sound pressure level (dB)

Distance from front side

N50 1m
(Standard 2×10-5Pa)

40 40
N40

30 30
N30

20 20
N20
10 10

0 0
63 125 250 500 1000 2000 4000 8000
Mid octave band frequency (Hz)

- 25 -
 '20 • SRK-T-320

5. PIPING SYSTEM
Models SRK25ZSP-W, 35ZSP-W

Outdoor air
temperature
sensor

Discharge pipe
Heat temperature sensor
Room exchanger
temperature temperature
sensor sensor

Heat
exchanger
Heat
exchanger
temperature
sensor

Capillary tube SRK25ZSP-W

only

Strainer
Capillary tube SRK35ZSP-W
only

Models SRK45ZSP-W, 50ZSP-W

Outdoor air
temperature
sensor

Discharge pipe
Heat temperature sensor
Room exchanger
temperature temperature
sensor sensor

4-way valve

Heat
exchanger
temperature
sensor

- 26 -
 '18'20 • SRK-T-320
• LMK-DB-257

6. RANGE OF USAGE & LIMITATIONS

SRK25ZSP-W, 35ZSP-W SRK45ZSP-W, 50ZSP-W

Net capacity = Capacity shown on specification Correction factors as follows

(1) Coefficient of cooling and heating capacity in relation to temperatures

1.3

1.2
Coefficient of cooling &

relation to temperature

Cooling
heating capacity in

1.1

1.0
Heating
0.9

0.8

0.7

0.6

Applicable range
Cooling operation

46
Outdoor air DB
temperature

40
°C DB

35
30
25 26
20 24

0
-5 Depends on installed situation
-10
-15
14 16 18 20 22
Heating operation

Indoor air WB temperature °C WB ISO-T1 Standard Condition

Indoor air DB
temperature
°C DB

30
25
20
15
-10 -5 0 5 10 15
ISO-H1 Standard Condition
Outdoor air WB temperature °C WB

- 27
23 -
 '18'20
• LMK-DB-257
• SRK-T-320

(2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping

Piping length [m] 7 10 15 20 25 30

Cooling 1.0 0.99 0.975 0.965 0.95 0.935
Heating 1.0 1.0 1.0 1.0 1.0 1.0

(3) Correction relative to frosting on outdoor heat exchanger during heating

Air inlet temperature of

outdoor unit in °CWB -15 -10 -9 -7 -5 -3 -1 1 3 5 or more

Adjustment coefficient 0.95 0.95 0.94 0.93 0.91 0.88 0.86 0.87 0.92 1.00

How to obtain the cooling and heating capacity

SRK35ZSP-W

3.2 ≒ 3.1kW

SRK35ZSP-W

- 24 -
28
 '20 • SRK-T-320

7. CAPACITY TABLES
Model SRK25ZSP-W Cooling Mode (kW) Heating Mode (HC) (kW)
Indoor air temperature Outdoor
Outdoor air Indoor air temperature
air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature
Air flow temperature
14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB ℃WB 16℃ DB 18℃ DB 20℃ DB 22℃ DB 24℃ DB
℃DB
TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC -15 1.72 1.69 1.65 1.61 1.58
10 2.82 2.47 2.95 2.43 3.06 2.56 3.11 2.53 3.16 2.50 3.26 2.61 3.34 2.54 -10 1.95 1.91 1.89 1.84 1.80
12 2.77 2.45 2.90 2.41 3.01 2.54 3.07 2.52 3.12 2.48 3.22 2.60 3.31 2.53 -5 2.11 2.08 2.04 2.02 1.98
14 2.71 2.43 2.85 2.39 2.97 2.52 3.03 2.50 3.08 2.47 3.18 2.59 3.28 2.52 Hi 0 2.21 2.18 2.14 2.12 2.09
16 2.66 2.40 2.80 2.37 2.92 2.50 2.98 2.48 3.04 2.45 3.15 2.57 3.24 2.51 10.0 5 2.82 2.79 2.77 2.72 2.68
18 2.60 2.38 2.74 2.34 2.88 2.49 2.94 2.46 2.99 2.44 3.11 2.56 3.20 2.50 (m3/min) 6 2.87 2.83 2.80 2.76 2.73
20 2.55 2.35 2.68 2.32 2.83 2.47 2.89 2.45 2.95 2.42 3.07 2.54 3.17 2.49 10 3.04 3.02 3.00 2.96 2.93
Hi 22 2.49 2.32 2.63 2.30 2.78 2.44 2.84 2.43 2.90 2.40 3.02 2.53 3.13 2.48 15 3.31 3.28 3.26 3.23 3.20
10.1 24 2.43 2.29 2.57 2.27 2.72 2.42 2.80 2.41 2.85 2.39 2.98 2.52 3.08 2.46 20 3.56 3.53 3.52 3.48 3.45
3
(m /min) 26 2.37 2.25 2.51 2.24 2.67 2.40 2.74 2.39 2.80 2.37 2.93 2.50 3.04 2.45
28 2.31 2.19 2.44 2.22 2.61 2.38 2.69 2.37 2.75 2.35 2.89 2.48 3.00 2.44
30 2.24 2.13 2.38 2.19 2.56 2.36 2.64 2.35 2.70 2.33 2.84 2.47 2.95 2.40
32 2.18 2.07 2.31 2.16 2.50 2.34 2.58 2.33 2.64 2.31 2.79 2.45 2.90 2.39
34 2.11 2.00 2.25 2.13 2.44 2.31 2.53 2.31 2.59 2.29 2.74 2.42 2.85 2.38
35 2.08 1.97 2.21 2.10 2.41 2.29 2.50 2.30 2.56 2.28 2.71 2.41 2.83 2.37
36 2.04 1.94 2.18 2.07 2.38 2.26 2.47 2.29 2.53 2.27 2.69 2.40 2.80 2.36
38 1.97 1.87 2.11 2.00 2.32 2.20 2.41 2.26 2.47 2.24 2.63 2.39 2.75 2.35
40 1.90 1.81 2.03 1.93 2.25 2.14 2.35 2.23 2.41 2.22 2.58 2.37 2.70 2.33
43 1.79 1.70 1.92 1.83 2.15 2.04 2.26 2.15 2.32 2.19 2.49 2.34 2.61 2.31
46 1.68 1.59 1.81 1.72 2.05 1.95 2.16 2.05 2.22 2.11 2.40 2.28 2.53 2.28

Model SRK35ZSP-W Cooling Mode (kW) Heating Mode (HC) (kW)

Indoor air temperature Outdoor
air temp.
Outdoor air Indoor air temperature
air 21 ℃ DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature
Air flow temperature
14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB ℃WB 16℃ DB 18℃ DB 20℃ DB 22℃ DB 24℃ DB
℃DB
TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC -15 2.21 2.17 2.12 2.07 2.03
10 3.61 2.86 3.77 2.81 3.91 2.92 3.98 2.88 4.05 2.84 4.17 2.93 4.28 2.85 -10 2.51 2.46 2.43 2.37 2.32
12 3.54 2.83 3.71 2.78 3.86 2.90 3.93 2.86 4.00 2.83 4.12 2.92 4.24 2.83 -5 2.71 2.68 2.62 2.59 2.55
14 3.47 2.79 3.65 2.75 3.80 2.87 3.87 2.84 3.94 2.80 4.08 2.90 4.19 2.82 Hi 0 2.85 2.80 2.76 2.72 2.68
16 3.40 2.76 3.58 2.72 3.74 2.84 3.82 2.81 3.89 2.78 4.03 2.88 4.15 2.80 10.1 5 3.63 3.58 3.56 3.49 3.44
18 3.33 2.72 3.51 2.69 3.68 2.82 3.76 2.79 3.83 2.76 3.98 2.86 4.10 2.79 (m3/min) 6 3.68 3.64 3.60 3.55 3.51
20 3.26 2.69 3.44 2.65 3.62 2.79 3.70 2.76 3.78 2.73 3.92 2.84 4.05 2.77 10 3.91 3.88 3.85 3.80 3.76
Hi 22 3.19 2.65 3.36 2.62 3.55 2.76 3.64 2.74 3.71 2.71 3.87 2.83 4.00 2.75 15 4.26 4.22 4.19 4.15 4.11
9.8 24 3.11 2.61 3.29 2.58 3.49 2.74 3.58 2.72 3.65 2.69 3.81 2.81 3.95 2.73 20 4.58 4.54 4.52 4.47 4.43
(m3/min) 26 3.03 2.58 3.21 2.55 3.42 2.70 3.51 2.69 3.59 2.66 3.76 2.78 3.89 2.72
28 2.95 2.54 3.13 2.51 3.35 2.68 3.45 2.66 3.52 2.64 3.70 2.76 3.84 2.70
30 2.87 2.50 3.05 2.48 3.27 2.64 3.38 2.64 3.45 2.61 3.64 2.74 3.78 2.68
32 2.79 2.46 2.96 2.44 3.20 2.61 3.31 2.60 3.38 2.58 3.57 2.72 3.72 2.66
34 2.70 2.42 2.88 2.40 3.12 2.58 3.24 2.58 3.31 2.56 3.51 2.69 3.65 2.64
35 2.66 2.40 2.83 2.38 3.08 2.57 3.20 2.56 3.28 2.54 3.47 2.68 3.62 2.63
36 2.61 2.38 2.79 2.36 3.04 2.55 3.16 2.55 3.24 2.53 3.44 2.67 3.59 2.62
38 2.52 2.34 2.70 2.32 2.96 2.52 3.09 2.52 3.16 2.50 3.37 2.64 3.52 2.59
40 2.43 2.29 2.60 2.28 2.88 2.49 3.01 2.49 3.08 2.47 3.30 2.62 3.45 2.57
43 2.29 2.18 2.46 2.22 2.75 2.43 2.89 2.44 2.96 2.42 3.19 2.58 3.35 2.54
46 2.15 2.04 2.31 2.15 2.62 2.38 2.77 2.39 2.84 2.38 3.08 2.54 3.23 2.50

Model SRK45ZSP-W Cooling Mode (kW) Heating Mode (HC) (kW)

Indoor air temperature Outdoor
Outdoor air Indoor air temperature
air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature
Air flow temperature
14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB ℃WB 16℃ DB 18℃ DB 20℃ DB 22℃ DB 24℃ DB
℃DB TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC -15 3.08 3.01 2.94 2.88 2.81
10 5.07 3.60 5.31 3.55 5.50 3.61 5.59 3.56 5.69 3.50 5.86 3.53 6.02 3.40 -10 3.48 3.42 3.37 3.29 3.22
12 4.98 3.55 5.22 3.50 5.42 3.57 5.52 3.52 5.62 3.46 5.80 3.51 5.96 3.38 -5 3.77 3.72 3.64 3.60 3.54
14 4.88 3.50 5.13 3.44 5.34 3.53 5.45 3.48 5.55 3.43 5.73 3.48 5.90 3.36 Hi 0 3.95 3.89 3.83 3.78 3.73
16 4.79 3.44 5.03 3.39 5.26 3.49 5.37 3.44 5.47 3.39 5.66 3.45 5.83 3.33 12.1 5 5.04 4.98 4.95 4.85 4.78
18 4.69 3.39 4.93 3.34 5.18 3.44 5.29 3.40 5.39 3.35 5.59 3.42 5.77 3.30 (m3/min) 6 5.12 5.06 5.00 4.94 4.88
20 4.59 3.32 4.83 3.28 5.09 3.39 5.20 3.36 5.31 3.32 5.52 3.39 5.70 3.28 10 5.44 5.38 5.35 5.28 5.23
Hi 22 4.48 3.26 4.73 3.22 5.00 3.35 5.12 3.32 5.22 3.28 5.44 3.35 5.63 3.25 15 5.92 5.87 5.82 5.76 5.71
9.1 24 4.37 3.21 4.62 3.17 4.90 3.30 5.03 3.28 5.14 3.24 5.36 3.32 5.55 3.21 20 6.36 6.31 6.28 6.21 6.16
(m3/min) 26 4.26 3.14 4.51 3.11 4.80 3.25 4.94 3.23 5.05 3.19 5.28 3.28 5.48 3.18
28 4.15 3.08 4.40 3.06 4.70 3.21 4.85 3.19 4.95 3.15 5.20 3.24 5.40 3.15 Notes(1) T hese data show average statuses.
30 4.04 3.02 4.28 2.99 4.60 3.16 4.75 3.14 4.86 3.11 5.11 3.21 5.31 3.13 Depending on the system control, there may be ranges where the
operation is not conducted continuously.
32 3.92 2.95 4.16 2.93 4.50 3.11 4.65 3.10 4.76 3.06 5.02 3.18 5.23 3.09
These data show the case where the operation frequency of a
34 3.80 2.89 4.04 2.87 4.39 3.06 4.55 3.05 4.66 3.02 4.93 3.14 5.14 3.06 compressor is fixed.
35 3.74 2.86 3.98 2.84 4.34 3.03 4.50 3.03 4.61 3.00 4.88 3.12 5.09 3.04 (2) C
 apacities are based on the following conditions.
36 3.67 2.82 3.92 2.81 4.28 3.00 4.45 3.00 4.55 2.97 4.84 3.10 5.05 3.02 Corresponding refrigerant piping length :5m
38 3.55 2.76 3.79 2.74 4.17 2.95 4.34 2.96 4.45 2.93 4.74 3.06 4.95 2.99 Level difference of Zero.
(3) S
 ymbols are as follows.
40 3.42 2.69 3.66 2.68 4.05 2.90 4.23 2.91 4.34 2.88 4.64 3.02 4.85 2.95
TC : Total cooling capacity (kW)
43 3.22 2.59 3.46 2.59 3.87 2.82 4.06 2.83 4.17 2.81 4.49 2.96 4.70 2.90 SHC : Sensible heat capacity (kW)
46 3.02 2.49 3.25 2.49 3.69 2.73 3.89 2.75 3.99 2.73 4.33 2.90 4.55 2.84 HC : Heating capacity (kW)

- 29 -
 '20 • SRK-T-320

Model SRK50ZSP-W Cooling Mode (kW) Heating Mode (HC) (kW)

Indoor air temperature Outdoor
Outdoor air Indoor air temperature
air 21 ℃DB 23 ℃DB 26 ℃DB 27 ℃DB 28 ℃DB 31 ℃DB 33 ℃DB Air flow temperature
Air flow temperature
14 ℃WB 16 ℃WB 18 ℃WB 19 ℃WB 20 ℃WB 22 ℃WB 24 ℃WB ℃WB 16℃ DB 18℃ DB 20℃ DB 22℃ DB 24℃ DB
℃DB TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC -15 3.44 3.37 3.29 3.22 3.15
10 5.63 3.99 5.90 3.93 6.11 3.99 6.22 3.93 6.32 3.87 6.51 3.91 6.69 3.76 -10 3.90 3.83 3.78 3.68 3.61
12 5.53 3.93 5.80 3.87 6.03 3.95 6.14 3.89 6.25 3.84 6.44 3.88 6.62 3.73 -5 4.22 4.16 4.08 4.03 3.97
14 5.43 3.87 5.70 3.82 5.94 3.90 6.05 3.85 6.16 3.80 6.37 3.84 6.55 3.71 Hi 0 4.43 4.36 4.29 4.23 4.17
16 5.32 3.81 5.59 3.75 5.85 3.86 5.96 3.81 6.08 3.75 6.29 3.81 6.48 3.68 12.1 5 5.64 5.57 5.54 5.43 5.36
18 5.21 3.75 5.48 3.69 5.75 3.81 5.88 3.76 5.99 3.71 6.21 3.78 6.41 3.65 (m3/min) 6 5.73 5.66 5.60 5.53 5.46
20 5.10 3.68 5.37 3.63 5.65 3.76 5.78 3.72 5.90 3.67 6.13 3.74 6.33 3.62 10 6.09 6.03 5.99 5.91 5.85
Hi 22 4.98 3.61 5.25 3.57 5.55 3.70 5.69 3.67 5.80 3.62 6.05 3.70 6.25 3.58 15 6.63 6.57 6.52 6.45 6.39
9.9 24 4.86 3.55 5.14 3.50 5.45 3.65 5.59 3.62 5.71 3.58 5.96 3.66 6.17 3.55 20 7.12 7.06 7.03 6.95 6.89
(m3/min) 26 4.74 3.48 5.01 3.44 5.34 3.60 5.49 3.58 5.61 3.53 5.87 3.62 6.08 3.52
28 4.61 3.40 4.89 3.38 5.23 3.54 5.39 3.52 5.50 3.48 5.78 3.58 5.99 3.48 Notes(1) T hese data show average statuses.
30 4.49 3.34 4.76 3.31 5.11 3.49 5.28 3.47 5.40 3.43 5.68 3.54 5.90 3.44 Depending on the system control, there may be ranges where the
operation is not conducted continuously.
32 4.35 3.26 4.63 3.24 5.00 3.43 5.17 3.42 5.29 3.38 5.58 3.50 5.81 3.41
These data show the case where the operation frequency of a
34 4.22 3.19 4.49 3.18 4.88 3.38 5.06 3.37 5.18 3.33 5.48 3.46 5.71 3.37 compressor is fixed.
35 4.15 3.16 4.42 3.14 4.82 3.34 5.00 3.34 5.12 3.31 5.43 3.44 5.66 3.36 (2) C
 apacities are based on the following conditions.
36 4.08 3.12 4.35 3.11 4.76 3.31 4.94 3.32 5.06 3.28 5.37 3.42 5.61 3.33 Corresponding refrigerant piping length :5m
38 3.94 3.04 4.21 3.03 4.63 3.25 4.82 3.26 4.94 3.23 5.27 3.38 5.50 3.29 Level difference of Zero.
(3) S
 ymbols are as follows.
40 3.80 2.97 4.07 2.96 4.50 3.20 4.70 3.21 4.82 3.18 5.16 3.33 5.39 3.26
TC : Total cooling capacity (kW)
43 3.58 2.86 3.84 2.86 4.30 3.11 4.52 3.13 4.63 3.10 4.98 3.26 5.23 3.19 SHC : Sensible heat capacity (kW)
46 3.35 2.74 3.61 2.75 4.10 3.01 4.32 3.04 4.44 3.02 4.81 3.19 5.05 3.13 HC : Heating capacity (kW)

- 30 -
 RLC012A105A
SELECTING OF INSTA
After getting customer’s approval, select in
Model DXK09, 12, 15, 18Z6-W / SRK25, 35, 45, 50ZSP-W / LMK09, 12, 15Z6-W
INSTALLATION MANUAL R32 REFRIGERANT USED 1. Indoor unit
• Where there is no obstruction to the air
distributed.
SAFETY PRECAUTIONS • A solid place where the unit or the wall w
• A place where there will be enough spac
• Before installation, read the “SAFETY PRECAUTIONS” carefully and strictly follow it during the installa- • Be sure to conrm no operation problem on the equipment after completing the installation. If unusual can be secured.)
tion work in order to protect yourself. noise can be heard during the test run, consult the dealer. • Where it is easy to conduct wiring and pi
• The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION . • Be sure to explain the operating methods as well as the maintenance methods of this equipment to the
• A place where unit is not directly expose
WARNING Indicates a potentially hazardous situation which, if not avoided, can result in serious con- user according to the user’s manual. • A place where it can be easily drained.
sequences such as death or severe injury. • Be sure to keep the installation manual together with user’s manual at a place where it is easily accessi-
• A place separated at least 1 m away fro
CAUTION Indicates a potentially hazardous situation which, if not avoided, can result in personal in- ble to the user any time. Moreover, ask the user to hand the manuals to a new user, whenever required.
jury or property damage. images and sounds.)
Both mention the important items to protect your health and safety. Therefore, strictly follow them by any means. • A place where this unit is not affected by
• Avoid installing this unit in place where t
• A place where there is no electric equip
WARNING • Install the indoor unit on the wall where t
180 cm.
• Be sure to use only for residential purpose. • Make sure that no air enters the refrigerant circuit Circuit breaker should be able to disconnect all poles under over
If this unit is installed in inferior environment such as machine when the unit is installed and removed. current. Absence of appropriate breakers can cause electric
8. APPLICATION DATA

2. Remote control
shop, vehicle (like ship), warehouse, etc., it can malfunction. If air enters the refrigerant circuit, the pressure in the refrigerant shock, personal injury or property damage. • A place where the air-conditioner can rec
• Installation must be carried out by the qualified circuit will become too high, which can cause burst and personal • Be sure to switch off the power source in the • A place where it is not affected by the TV
installer completely in accordance with the instal- injury. event of installation, maintenance or service. • Do not place where it is exposed to direc
lation manual. • Be sure to use the prescribed pipes, are nuts and If the power source is not switched off, there is a risk of electric
Installation by non qualified person or incorrect installation can tools for R32. shock, unit failure or personal injury. 3. Outdoor unit
Select the suitable installation location wh
cause serious troubles such as water leak, electric shock, re and Using existing parts (for R22 or R407C) can cause refrigerant cir- • Be sure to tighten the cables securely in terminal
• Unit will be stable, horizontal and free of
personal injury. cuit burst resulting in unit failure and personal injury. block and relieve the cables properly to prevent • There is no obstacle which can prevent

-
• Be sure to wear protective goggles and gloves • Be sure to connect both liquid and gas connecting overloading the terminal blocks. • There is enough space for service and
while performing installation work. pipes properly before operating the compressor. Loose connections or cable mountings can cause anomalous heat • Neighbours are not bothered by noise o
Models SRK25ZSP-W, 35ZSP-W, 45ZSP-W, 50ZSP-W

Improper safety measures can result in personal injury. Do not open the liquid and gas operation valves production or re. • Outlet air of the unit does not blow direc

31 -
• Use the original accessories and the specified before completing piping work, and evacuation. • Do not process, splice or modify the power cable, • Drain water can be discharged properly.
components for the installation. If the compressor is operated when connecting pipes are not or share the socket with other power plugs. • There is no risk of ammable gas leaka
Using parts other than those prescribed may cause water leak, connected and operation valves are open, air can be sucked into Improper power cable or power plug can cause re or electric shock • There are no other heat sources nearby.
electric shock, re and personal injury. the refrigerant circuit which can cause anomalous high pressure due to poor connection, insufcient insulation or over-current. • Unit is not directly exposed to rain or su
• Do not install the unit near the location where resulting in burst or personal injury. • Do not perform any change in protective device or • Unit is not directly exposed to oil mist an
• Chemical substances like ammonia (or
leakage of ammable gases can occur. • Be sure to tighten the flare nuts to specified its setup condition yourself.
acid (sulfurous acid etc.), which can har
If leaked gases accumulate around the unit, it can cause fire torque using the torque wrench. Changing protective device specifications can cause electric • Unit is not directly exposed to corrosive
resulting in property damage and personal injury. Tightening are nuts with excess torque can cause burst and re- shock, re or burst. atmosphere.
• When installing the unit in small rooms, make frigerant leakage after a long period. • Be sure to clamp the cables properly so that they • No TV set or radio receiver is placed wit
sure that refrigerant density does not exceed the • During pump down work, be sure to stop the com- do not touch any internal component of the unit. • Unit is not affected by electromagnetic
limit (Reference: ISO5149) in the event of leakage. pressor before closing operation valves and re- If cables touch any internal component, it can cause overheating and re. ments.
If refrigerant density exceeds the limit, consult the dealer and in- moving connecting pipes. • Be sure to install service cover properly. • Strong wind does not blow against the u
stall the ventilation system. If the connecting pipes are removed when the compressor is in Improper installation can cause electric shock or re due to intru- • Heavy snowfalls do not occur (If installe
Otherwise lack of oxygen can occur resulting in serious accident. operation and operation valves are open, air can be sucked into sion of dust or water. • There must be 1 meter or larger spac
• Install the unit in a location where unit will remain the refrigerant circuit which can cause anomalous high pressure • Be sure to use the prescribed power and connect- Walls surrounding the unit from 4 sides i
1200 mm or less. Refer to the following
stable, horizontal and free of any vibration trans- resulting in burst or personal injury. ing cables for electrical work.
mission. • In the event of refrigerant leakage during instal- Using improper cables can cause electric leak or re.
Unsuitable installation location can cause the unit to fall resulting lation, be sure to ventilate the working area prop- • This appliance must be connected to main power Inlet L3
in material damage and personal injury. erly. source by means of a circuit breaker or switch L2 (Service
space )
• Do not run the unit with removed panels or protections. If the refrigerant comes into contact with naked ames, poisonous with a contact separation of at least 3 mm. L4
Inlet
Touching rotating equipments, hot surfaces or high voltage parts gases will be produced. Improper electrical work can cause unit failure or personal injury.
can cause personal injury due to entrapment, burn or electric shock. • Electrical work must be carried out by the quali- • Be sure to connect the power source cable with Outlet
L1
• This unit is designed specically for R32. ed electrician, strictly in accordance with nation- power source properly.
Using any other refrigerant can cause unit failure and personal al or regional electricity regulations. Improper connection can cause intrusion of dust or water resulting
injury. Incorrect installation can cause electric shock, fire or personal in electric shock or re.
• Do not vent R32 into atmosphere. injury. NOTE
R32 is a fluorinated greenhouse gas with a Global Warming • Make sure that earth leakage breaker and circuit
Potential (GWP) = 675. breaker of appropriate capacities are installed. When more than one unit are installed sid
'20 • SRK-T-320

as a service space.
CAUTION CAUTION
• Take care when carrying the unit by hand. It can cause corrosion of heat exchanger and damage to plastic It can cause performance degradation, corrosion and damage of When more than one unit are installed in
If the unit weight is more than 20 kg, it must be carried by two or parts. components, unit malfunction and re. circuiting may not occur.
more persons. • Do not install the unit close to the equipments • Dispose of all packing materials properly.
Do not carry the unit by the plastic straps. Always use the carry that generate electromagnetic waves and/or high- Packing materials contain nails and wood which can cause per-
handle. harmonic waves. sonal injury.
• Do not install the outdoor unit in a location where Equipment such as inverters, standby generators, medical high Keep the polybag away from children to avoid the risk of suffoca- DRAIN PIPING WORK (
insects and small animals can inhabit. frequency equipments and telecommunication equipments can af- tion. Carry out drain piping work by using a drai
Insects and small animals can enter the electrical parts and cause fect the system, and cause malfunctions and breakdowns. • Do not put anything on the outdoor unit. accessories if condensed water needs to
damage resulting in fire or personal injury. Instruct the user to The system can also affect medical equipment and telecommuni- Object may fall causing property damage or personal injury. (1) Install drain elbow and drain grommet.
 mission. • In the event of refrigerant leakage during instal- Using improper cables can cause electric leak or re.
Unsuitable installation location can cause the unit to fall resulting lation, be sure to ventilate the working area prop- • This appliance must be connected to main power Inlet L3
in material damage and personal injury. erly. source by means of a circuit breaker or switch L2 (Service
space )
• Do not run the unit with removed panels or protections. If the refrigerant comes into contact with naked ames, poisonous with a contact separation of at least 3 mm. L4
Inlet
Touching rotating equipments, hot surfaces or high voltage parts gases will be produced. Improper electrical work can cause unit failure or personal injury.
can cause personal injury due to entrapment, burn or electric shock. • Electrical work must be carried out by the quali- • Be sure to connect the power source cable with Outlet
L1
• This unit is designed specically for R32. ed electrician, strictly in accordance with nation- power source properly.
Using any other refrigerant can cause unit failure and personal al or regional electricity regulations. Improper connection can cause intrusion of dust or water resulting
injury. Incorrect installation can cause electric shock, fire or personal in electric shock or re.
• Do not vent R32 into atmosphere. injury. NOTE
R32 is a fluorinated greenhouse gas with a Global Warming • Make sure that earth leakage breaker and circuit
Potential (GWP) = 675. breaker of appropriate capacities are installed. When more than one unit are installed sid
as a service space.
CAUTION CAUTION
• Take care when carrying the unit by hand. It can cause corrosion of heat exchanger and damage to plastic It can cause performance degradation, corrosion and damage of When more than one unit are installed in
If the unit weight is more than 20 kg, it must be carried by two or parts. components, unit malfunction and re. circuiting may not occur.
more persons. • Do not install the unit close to the equipments • Dispose of all packing materials properly.
Do not carry the unit by the plastic straps. Always use the carry that generate electromagnetic waves and/or high- Packing materials contain nails and wood which can cause per-
handle. harmonic waves. sonal injury.
• Do not install the outdoor unit in a location where Equipment such as inverters, standby generators, medical high Keep the polybag away from children to avoid the risk of suffoca- DRAIN PIPING WORK (
insects and small animals can inhabit. frequency equipments and telecommunication equipments can af- tion. Carry out drain piping work by using a drai
Insects and small animals can enter the electrical parts and cause fect the system, and cause malfunctions and breakdowns. • Do not put anything on the outdoor unit. accessories if condensed water needs to
damage resulting in fire or personal injury. Instruct the user to The system can also affect medical equipment and telecommuni- Object may fall causing property damage or personal injury. (1) Install drain elbow and drain grommet.
keep the surroundings clean. cation equipment, and obstruct its function or cause jamming. • Do not touch the aluminum n of the outdoor unit. (2) Seal around the drain elbow and drain
• If the outdoor unit is installed at height, make sure • Do not install the unit in the locations where: Aluminium fin temperature is high during heating operation.
that there is enough space for installation, mainte- • There are heat sources nearby. Touching n can cause burn. Do not put a grom
This is a supplem
nance and service. • Unit is directly exposed to rain or sunlight. • Do not touch any refrigerant pipe with your hands
when a large amo
Insufcient space can result in personal injury due to falling from • There is any obstacle which can prevent smooth air circulation when the system is in operation.
the height. from inlet and outlet side of the unit. During operation the refrigerant pipes become extremely hot or <DXK09/12, SRK25/35, LMK09/1
• Do not install the unit near the location where • Unit is directly exposed to oil mist and steam such as kitchen. extremely cold depending on the operating condition. Touching
neighbours are bothered by noise or air generat- • Chemical substances like ammonia (organic fertilizer), calcium pipes can cause personal injury like burn (hot/cold).
ing from the unit. chloride (snow melting agent) and acid (sulfurous acid etc.), • Install isolator or disconnect switch on the power
It can affect surrounding environment and cause a claim. which can harm the unit, will generate or accumulate. source wiring in accordance with the local codes
• Do not install in the locations where unit is direct- • Drain water can not be discharged properly. and regulations.
ly exposed to corrosive gases (like sulphide gas, • TV set or radio receiver is placed within 1 m. The isolator should be locked in OFF state in accordance with
chloride gas), sea breeze or salty atmosphere. • Height above sea level is more than 1000 m. EN60204-1.

ACCESSORIES AND TOOLS

-
Standard accessories (supplied with indoor unit) Locally procured parts Tools for installation work
(a) Sleeve (1 pc.) Plus headed driver Hole core drill (65 mm in diameter) Drain grommet
(1) Installation board 1 pc. (6) Batteries [R03 (AAA, Micro) 1.5 V] 2 pcs. (b) Sealing plate (1 pc.) Knife Wrench key (Hexagon) [4 mm] Drain elbow

32 -
(c) Inclination plate (1 pc.) Saw Flaring tool set*
lters
(2) Remote control 1 pc. (7) Air-cleaning 2 pcs. (d) Putty Tape measure Gas leak detector*
(LMK model only)
(e) Connecting cable Torque wrench
holders Pipe bender
(3) Remote control holder 1 pc. (8) Filter 2 pcs. (f) Drain hose (extension hose) (14.0-62.0 N·m (1.4-6.2 kgf·m))
(LMK model only)
Piping cover Plier
(g) Gauge for projection adjustment
Tapping screws (for insulation of connection piping) Pipe cutter (Used when are is made by using
(4) (for installation board ø4 X 25 mm) 5 pcs. (9) Insulation (#486 50 X 100 t3) 1 pc.
(h) Clamp and screw (for nishing work) conventional are tool) CAUTION
Spanner wrench
(i) Anchor bolt (M10-M12) × 4 pcs. Do not use drain elbow and drain gromm
(5) Wood screws 2 pcs. Flare adjustment gauge Charge hose *
(for remote control holder ø3.5 X 16 mm) (j) Electrical tape days of sub zero temperature. (There is a
Vacuum pump* Vacuum pump adapter* drain.)
(k) Connecting pipe (Anti-reverse ow type)
Standard accessories (supplied with outdoor unit) Gauge manifold *
(l) Power cable
* Designed specically for R32 or R410A
(1) Drain grommet 1 pc. (2) Drain elbow 1 pc.

RLC012A105A_EN.indd 1
'20 • SRK-T-320
 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

RLC012A105A
SELECTING OF INSTALLATION LOCATION
After getting customer’s approval, select installation location according to following guidelines.
RK25, 35, 45, 50ZSP-W / LMK09, 12, 15Z6-W 5 cm
1. Indoor unit m 6.5 cm minimum from the ceiling
from inimum (Recommendation 8.0 cm)
the w
• Where there is no obstruction to the airow and where the cooled and heated air can be evenly all
distributed. Installation board
• A solid place where the unit or the wall will not vibrate. 10 cm
• A place where there will be enough space for servicing. (Where space mentioned on the right side m
from inimum
quipment after completing the installation. If unusual can be secured.)
the w
all
dealer. • Where it is easy to conduct wiring and piping work.
s the maintenance methods of this equipment to the • A place where unit is not directly exposed to sunlight or street light.
• A place where it can be easily drained.
th user’s manual at a place where it is easily accessi-
• A place separated at least 1 m away from the television or the radio. (To prevent interference to
hand the manuals to a new user, whenever required.
images and sounds.)
• A place where this unit is not affected by the high frequency equipment or electric equipment.
• Avoid installing this unit in place where there is much oil mist.
Sleeve
• A place where there is no electric equipment or household.
(sold separately)
• Install the indoor unit on the wall where the height from the oor to the bottom of the unit is more than
180 cm.
r should be able to disconnect all poles under over
nce of appropriate breakers can cause electric 2. Remote control
al injury or property damage. • A place where the air-conditioner can receive the signal surely during operating the remote control.
switch off the power source in the • A place where it is not affected by the TV, radio etc. Remote control
stallation, maintenance or service. • Do not place where it is exposed to direct sunlight or near heat devices such as a stove.
ource is not switched off, there is a risk of electric Remote control holder
lure or personal injury. 3. Outdoor unit
Select the suitable installation location where: Wood screws
tighten the cables securely in terminal
• Unit will be stable, horizontal and free of any vibration transmission.
relieve the cables properly to prevent • There is no obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
g the terminal blocks. • There is enough space for service and maintenance of unit.
180 cm minimum from the oor

tions or cable mountings can cause anomalous heat • Neighbours are not bothered by noise or air generating from the unit.
re.

-
• Outlet air of the unit does not blow directly to animals or plants.
cess, splice or modify the power cable, • Drain water can be discharged properly.
e socket with other power plugs. • There is no risk of ammable gas leakage.
r cable or power plug can cause re or electric shock • There are no other heat sources nearby.

33 -
• Unit is not directly exposed to rain or sunlight. The screw of the
nnection, insufcient insulation or over-current. service panel is
form any change in protective device or • Unit is not directly exposed to oil mist and steam.
tightened securely.
• Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and
ondition yourself. Service panel for
acid (sulfurous acid etc.), which can harm the unit, will not generate or accumulate.
tective device specifications can cause electric electrical parts
• Unit is not directly exposed to corrosive gases (like sulphide gas, chloride gas), sea breeze or salty
urst. atmosphere. Note as a unit designed for R32
clamp the cables properly so that they • No TV set or radio receiver is placed within 1 m. • Do not use any refrigerant other than R32. R32 will rise to pressure about 1.6 times higher than that of
h any internal component of the unit. • Unit is not affected by electromagnetic waves and/or high-harmonic waves generated by other equip- a conventional refrigerant. A cylinder containing R32 has a light blue indication mark on the top.
any internal component, it can cause overheating and re. ments. • Do not use a charge cylinder. The use of a charge cylinder will cause the refrigerant composition to
change, which results in performance degradation.
install service cover properly. • Strong wind does not blow against the unit outlet.
• In charging refrigerant, always take it out from a cylinder in the liquid phase.
llation can cause electric shock or re due to intru- • Heavy snowfalls do not occur (If installed, provide proper protection to avoid snow accumulation). • All indoor units must be models designed exclusively for R32. Check connectable indoor unit models in
water. • There must be 1 meter or larger space between the unit and the wall in at least 1 of the 4 sides. a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation)
use the prescribed power and connect- Walls surrounding the unit from 4 sides is not acceptable. The wall height on the outlet side should be
Limitation of the piping length
1200 mm or less. Refer to the following gure and table for details.
for electrical work.
Model DXK09, SRK25, LMK09 DXK12, SRK35, LMK12 DXK15/18, SRK45/50, LMK15
r cables can cause electric leak or re.
nce must be connected to main power Installation space (mm) Total one way length MAX. 15 m MAX. 15 m MAX. 25 m
Inlet L3
means of a circuit breaker or switch L2 (Service L1 280 or more Vertical height difference MAX. 10 m MAX. 10 m MAX. 15 m
space )
act separation of at least 3 mm. L4 L2 100 or more
Inlet Less than 10 m : Not required Less than 15 m : Not required
trical work can cause unit failure or personal injury. L3 80 or more Additional refrigerant Not required
More than 10 m : 20 g/m More than 15 m : 20 g/m
connect the power source cable with Outlet L4 250 or more
L1
rce properly. Charging refrigerant
ection can cause intrusion of dust or water resulting (1) Charge the R32 refrigerant in liquid phase from service port with both liquid and gas operation valves
shut. Since R32 refrigerant must be charged in the liquid phase, make sure that refrigerant is dis-
ck or re. charged from the cylinder in the liquid phase all the time.
NOTE (2) When it is difcult to charge a required refrigerant amount, fully open both liquid and gas operation
valves and charge refrigerant, while running the unit in the cooling mode. When refrigerant is charged
When more than one unit are installed side by side, provide a 250 mm or wider interval between them with the unit being run, complete the charge operation within 30 minutes.
as a service space. (3) Write the additional refrigerant charge calculated from the connecting pipe length on the label attached
on the service cover.
CAUTION CAUTION
erformance degradation, corrosion and damage of When more than one unit are installed in parallel directions, provide sufcient inlet space so that short-
• Running the unit with an insufcient quantity of refrigerant for a long time can cause unit malfunction.
nit malfunction and re. circuiting may not occur.
• Do not charge more than the maximum refrigerant amount. It can cause unit malfunction.
'20 • SRK-T-320

all packing materials properly.

rials contain nails and wood which can cause per-

bag away from children to avoid the risk of suffoca- DRAIN PIPING WORK (if necessary) INSTALLING REMOTE CONTROL
Carry out drain piping work by using a drain elbow and a drain grommet supplied separately as Mount the batteries
anything on the outdoor unit. accessories if condensed water needs to be drained out. (1) Slide and take out the cover of backside.
ll causing property damage or personal injury. (1) Install drain elbow and drain grommet. (2) Mount the batteries [R03 (AAA, Micro), × 2 pieces]
ch the aluminum n of the outdoor unit. (2) Seal around the drain elbow and drain grommet with putty or adequate caulking material. in the body properly.
(Fit he poles with the indication marks + & −)
n temperature is high during heating operation. (3) Set the cover again.
an cause burn. Do not put a grommet on this hole. Remote control
This is a supplementary drain hole to discharge drain water,
ch any refrigerant pipe with your hands Installing remote control holder
when a large amount of it is gathered. Wood screws
ystem is in operation. (1) Select the place where the unit can receive signals.
(2) Fix the holder to pillar or wall with wood screws. ø3.5 X 16
ion the refrigerant pipes become extremely hot or <DXK09/12, SRK25/35, LMK09/12> <DXK15/18, SRK45/50, LMK15>
e intrusion of dust or water resulting (1) Charge the R32 refrigerant in liquid phase from service port with both liquid and gas operation valves
shut. Since R32 refrigerant must be charged in the liquid phase, make sure that refrigerant is dis-
charged from the cylinder in the liquid phase all the time.
NOTE (2) When it is difcult to charge a required refrigerant amount, fully open both liquid and gas operation
valves and charge refrigerant, while running the unit in the cooling mode. When refrigerant is charged
When more than one unit are installed side by side, provide a 250 mm or wider interval between them with the unit being run, complete the charge operation within 30 minutes.
as a service space. (3) Write the additional refrigerant charge calculated from the connecting pipe length on the label attached
on the service cover.
CAUTION CAUTION
radation, corrosion and damage of When more than one unit are installed in parallel directions, provide sufcient inlet space so that short-
• Running the unit with an insufcient quantity of refrigerant for a long time can cause unit malfunction.
and re. circuiting may not occur.
• Do not charge more than the maximum refrigerant amount. It can cause unit malfunction.
materials properly.
ils and wood which can cause per-

children to avoid the risk of suffoca- DRAIN PIPING WORK (if necessary) INSTALLING REMOTE CONTROL
Carry out drain piping work by using a drain elbow and a drain grommet supplied separately as Mount the batteries
the outdoor unit. accessories if condensed water needs to be drained out. (1) Slide and take out the cover of backside.
rty damage or personal injury. (1) Install drain elbow and drain grommet. (2) Mount the batteries [R03 (AAA, Micro), × 2 pieces]
num n of the outdoor unit. (2) Seal around the drain elbow and drain grommet with putty or adequate caulking material. in the body properly.
(Fit he poles with the indication marks + & −)
is high during heating operation. (3) Set the cover again.
Do not put a grommet on this hole. Remote control
This is a supplementary drain hole to discharge drain water,
erant pipe with your hands Installing remote control holder
when a large amount of it is gathered. Wood screws
peration. (1) Select the place where the unit can receive signals.
(2) Fix the holder to pillar or wall with wood screws. ø3.5 X 16
nt pipes become extremely hot or <DXK09/12, SRK25/35, LMK09/12> <DXK15/18, SRK45/50, LMK15>
the operating condition. Touching
ry like burn (hot/cold).
nnect switch on the power HOW TO REMOVE AND INSTALL FRONT PANEL
dance with the local codes
1. Removing
(1) Remove the air inlet panel and the air lters. Latch
d in OFF state in accordance with (2) Remove the 2 screws.
(3) Remove the 3 upper latches and then front panel
can be removed.
2. Installing
(1) Cover the unit with the front panel and x 3
upper latches.
nstallation work (2) Secure the front panel with the 2 screws.
Hole core drill (65 mm in diameter) Drain grommet (3) Install the air inlet panel and the air lters.
Wrench key (Hexagon) [4 mm] Drain elbow
Flaring tool set* Drain grommet
Gas leak detector*
Drain elbow PUMP DOWN WORK
Pipe bender Drain hose For the environmental protection, be sure to pump down when relocating or disposing of the unit. Pump
(To be procured on

-
down is the method of recovering refrigerant from the indoor unit to the outdoor unit before the connecting
the installer’s part) pipes are removed from the unit. When pump down is carried out, forced cooling operation is needed.
Gauge for projection adjustment
(Used when are is made by using
conventional are tool) CAUTION Forced cooling operation
(1) Turn off the power source and turn it on again

34 -
Charge hose * Do not use drain elbow and drain grommet if there is a possibility to have several consecutive after 1 minute.
days of sub zero temperature. (There is a risk of drain water freezing inside and blocking the (2) Press the ON/OFF button continuously for at
Vacuum pump adapter* drain.) least 5 seconds. Then operation will start.
(Anti-reverse ow type)
ed specically for R32 or R410A For the detail of pump down, refer to the
installation manual of outdoor unit.
Unit ON/OFF button

1. INSTALLING INSTALLATION BOARD 5. DRAINAGE WORK

Installation board Unit • Arrange the drain hose in a downward an
• Installation board should be installed on the wall which can support the weight of the indoor unit. 100
50 (Service Space) 130.5 508 144.5 (Service space) 8/18/2020 9:49:38 AM • Avoid the following drain piping.
• Adjustment of the installation board in the horizontal direction is to be conducted with ve screws in a temporary
57 394 57
tightened state. 157 455 171
• With the standard hole as a center, adjust the board and level it. 254 254
65 (Service Space)
12.3

Standard hole
394
44.6

Higher than The drain hose Wavy

Bolt specified tip is in water.
(M6 X 12)
190
247.3

6. INSTALLING INDOO
47

47

In case of fixing the unit on Indoor unit

concrete wall, use nut anchor.
6.9

55 69
443.5 (Gas pipe)
511.5 (Liquid pipe)
546 (Drain hose) atio
Mating mark for level surface Latch (2 loc
Unit: mm
15 (Service Space)

CAUTION
Improper adjustment of the installation board can cause water leakage.
'20 • SRK-T-320

Installation board
Wall

2. DRILLING HOLE AND FIXTURE OF SLEEVE

Indoor unit base lower latch
When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use sealing plate, sleeve and inclination plate (Locally procured parts).
(a) Sleeve (c) Inclination plate
Top (a) Sleeve WARNING
(d) Putty 7. CONNECTING PIPIN
5 Turn to Completely seal the hole in the wall with putty.
tighten If not sealed properly, dust, insects, small animals,
ø65 and highly humid air may enter the room from out- 1. Preparation of connecting pip
Cut
(b) Sealing plate (d) Putty side, which could result in re or other hazards. 1.1. Selecting connecting pipe
Indoor side Outdoor side Thickness of the wall + 1.5 cm Indoor side Outdoor side Installed state Indoor side Outdoor side Select connecting pipe according to the foll
CAUTION
 1
2
6. INSTALLING INDOO

47

47
In case of fixing the unit on Indoor unit
concrete wall, use nut anchor.

6.9
55 69
443.5 (Gas pipe)
511.5 (Liquid pipe)
546 (Drain hose) atio
Mating mark for level surface Latch (2 loc
Unit: mm

15 (Service Space)
CAUTION
Improper adjustment of the installation board can cause water leakage.
Installation board
Wall

2. DRILLING HOLE AND FIXTURE OF SLEEVE

Indoor unit base lower latch
When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use sealing plate, sleeve and inclination plate (Locally procured parts).
(a) Sleeve (c) Inclination plate
Top (a) Sleeve WARNING
(d) Putty 7. CONNECTING PIPIN
5 Turn to Completely seal the hole in the wall with putty.
tighten If not sealed properly, dust, insects, small animals,
ø65 and highly humid air may enter the room from out- 1. Preparation of connecting pip
Cut
(b) Sealing plate (d) Putty side, which could result in re or other hazards. 1.1. Selecting connecting pipe
Indoor side Outdoor side Thickness of the wall + 1.5 cm Indoor side Outdoor side Installed state Indoor side Outdoor side Select connecting pipe according to the foll
(1) Drill a hole with hole (2) Cut sleeve to adjust to wall (3) Fix sealing plate, sleeve (4) After piping work, CAUTION Model DXK09/12
core drill. thickness. In case of rear and inclination plate. seal the hole in the wall Completely seal the hole in the wall with putty. SRK25/35
piping draw out, cut off the with putty. If not sealed properly, furniture and other xtures may LMK09/12
lower and the right side be damaged by water leakage or condensation.
portions of the sleeve collar. Gas pipe ø9.52
Liquid pipe ø6.35
• Pipe wall thickness must be greater than
3. ELECTRICAL WIRING WORK • Pipe material must be O-type (Phosphorus de
1.2. Cutting connecting pipe
• Before installation, make sure that the power source complies with the air-conditioner’s power specication.
• Carry out electrical wiring work according to following guidelines. WARNING (1) Cut the connecting pipe to the required
• Make sure that all the electrical work is carried out in accordance with the national or regional electrical standards. (2) Hold the pipe downward and remove th
1. Preparing cable • Make sure that the earth leakage breaker and circuit breaker of appropriate capacities are installed (3) Cover the connecting pipe ends with th
(1) Selecting cable (Refer to the table given below).
Select the power source cable and connecting cable in accordance with the specications mentioned below. • Do not turn on the power until the electrical work is completed. 2. Piping work
(a) Power source cable • Do not use a condensive capacitor for power factor improvement under any circumstances.
3-core* 2.5 mm2 or more, conformed with 60245 IEC57 (It does not improve power factor. Moreover, it can cause an abnormal overheat accident). 2.1. Flaring pipe
When selecting the power source cable length, make sure that voltage drop is less than 2 %. (1) Take out are nuts from the operation va
If the wire length gets longer, increase the wire diameter. Breaker specications (2) Flare the pipes according to table and
(b) Connecting cable Flare dimensions for R32 are different f
4-core* 1.5 mm2, conformed with 60245 IEC57 Model Phase Earth leakage breaker Circuit breaker
Although it is recommended to use the 
* 1 Earth wire is included (Yellow/Green). DXK09/12, SRK25/35, LMK09/12 Leakage current: 30 mA, Over current: 16 A tional aring tools can also be used by adj
Single phase
(2) Arrange each wire length as shown below. DXK15/18, SRK45/50, LMK15 0.1sec or less Over current: 20 A
Make sure that each wire is stripped 10 mm from the end. A

-
Main fuse specication Copper pipe
(3) Attach round crimp-type terminal to each wire as shown in the below. A
Model Specication Parts No. Code on LABEL,WIRING outer diameter
Select the size of round crimp-type terminal after considering the specications of terminal block and wire diameter.
<Connecting cable (4 wires)> DXK09/12, SRK25/35, LMK09/12 250V 15A SSA564A136 F7 ø6.35 9.1
<Wire end> DXK15/18, SRK45/50, LMK15 250V 20A SSA564A136A F4

35 -
<Power source cable (3 wires)>
ø9.52 13.2
30 mm or more Round crimp- 3. Connecting cable (Outdoor)
type terminal (1) Remove the service cover. ø12.7 16.6
10 mm (2) Connect the cables according to the instructions and gures given below.
(a) Connect the earth wire of power source cable. 2.2 Connecting pipes
An earth wire must be connected before connecting the other wires of power source cable. (1) Connect pipes on both liquid and gas si
40 mm or more Sleeve Keep the earth wire longer than the remaining two wires of power source cable. (2) Tighten nuts to specied torque shown i
Earth wire
(b) Connect the remaining two wires (N and L) of power source cable.
(c) Connect the wires of connecting cable. Make sure that for each wire, outdoor and indoor side Operation valve size (mm) Tightening
2. Connecting cable (Indoor) terminal numbers match.
The screw of the lid (3) Fasten the cables properly with cable clamps so that no external force may work on terminal connections. ø6.35 (1/4") 1
(1) Remove the lid. is tightened securely. Moreover, make sure that cables do not touch the piping, etc. When cables are connected, make
Terminal block
(2) Remove the terminal cover. sure that all electrical components within the electrical component box are free of loose connector ø9.52 (3/8") 3
(3) Remove the cable clamp. Terminal cover coupling or terminal connection.
(4) Connect the connecting wire to ø12.7 (1/2") 4
the terminal block. <Circuit diagram>
Lid
(5) Fix the connecting cable by
cable clamp. Outdoor unit CAUTION
(6) Fix the terminal cover. N L 1 2/N 3 • Do not apply refrigerating machine oil to t
(7) Fix the lid. • Do not apply excess torque to the ared
Power
leakage.
Screw
source
Cable clamp cable 3. Heating and condensation pr
Connecting cable
Earth wire shall be Yellow/Green (Y/G) in color (1) Dress the connecting pipes (both liquid
Circuit
and longer than other wires for safety reason. breaker and dew condensation.
Use the heat insulating material which
NOTE that insulation is wrapped tightly aroun
Earth Earth (2) Wrap the refrigerant pipings of indoor u
Take care not to confuse the terminal numbers for indoor and outdoor connections. leakage
breaker 1 2/N 3 (3) Cover the are-connected joints (indo
WARNING Indoor unit Connecting cable Power source with an insulation pad (standard access
Power
source cable (4) Wrap the connecting pipes, connecting
Incorrect wiring connection can cause malfunction or re.
(2) (3)
Tape

4. FORMING PIPING AND DRAIN HOSE

'20 • SRK-T-320

1. Forming piping Forming of pipings. Taping of the exterior

Piping is possible in the right, rear, downward, left, left rear or left downward direction. • Hold the bottom of the piping and x direction • Tape only the portion that goes through the wall.
before stretching it and shaping it. • Always tape the wiring with the piping.
Pipings Position i
NOTE upward.
Sufcient care must be taken not to damage the panels when connecting pipes.

Right
8. INSTALLATION CHE
Drain hose
2. Drain change procedures After nishing the installation work, check t
(1) Remove the screw and drain hose. before turning on the power. Conduct a tes
unit operates properly.
Rear (2) Remove the drain cap by hand or pliers. At the same time, explain to the customer
 (7) Fix the lid. • Do not apply excess torque to the ared
Power
leakage.
Screw
source
Cable clamp cable 3. Heating and condensation pr
Connecting cable
Earth wire shall be Yellow/Green (Y/G) in color (1) Dress the connecting pipes (both liquid
Circuit
and longer than other wires for safety reason. breaker and dew condensation.
Use the heat insulating material which
NOTE that insulation is wrapped tightly aroun
Earth Earth (2) Wrap the refrigerant pipings of indoor u
Take care not to confuse the terminal numbers for indoor and outdoor connections. leakage
breaker 1 2/N 3 (3) Cover the are-connected joints (indo
WARNING Indoor unit Connecting cable Power source with an insulation pad (standard access
Power
source cable (4) Wrap the connecting pipes, connecting
Incorrect wiring connection can cause malfunction or re.
(2) (3)
Tape

4. FORMING PIPING AND DRAIN HOSE

1. Forming piping Forming of pipings. Taping of the exterior
Piping is possible in the right, rear, downward, left, left rear or left downward direction. • Hold the bottom of the piping and x direction • Tape only the portion that goes through the wall.
before stretching it and shaping it. • Always tape the wiring with the piping.
Pipings Position i
NOTE upward.
Sufcient care must be taken not to damage the panels when connecting pipes.

Right
8. INSTALLATION CHE
Drain hose
2. Drain change procedures After nishing the installation work, check t
(1) Remove the screw and drain hose. before turning on the power. Conduct a tes
unit operates properly.
Rear (2) Remove the drain cap by hand or pliers. At the same time, explain to the customer
Left (3) Insert the drain cap which was removed at procedure (2) securely using a hexagonal wrench etc. how to take care of the unit following the u
Downward rear Left (4) Install the drain hose and screw securely.
Left downward (1) (2) (3) (4)
Screw NOTE
Left hand side piping Right hand side piping During restart or change in operation mode
operating for approximately 3 minutes. Thi
Piping in the left rear direction Piping in the right rear direction Drain cap
and it is not malfunction.

Piping in the left direction Piping in the right direction CAUTION

Incorrect installation of drain hose and cap can cause water leakage.
RLC012A105A

5. DRAINAGE WORK
RLC012A105A_EN.indd 2

-
nit • Arrange the drain hose in a downward angle. • Pour water to the drain pan located under the heat exchanger, and ensure that the water is discharged outdoor.
100
144.5 (Service space) • Avoid the following drain piping. • When extended drain hose is present inside the room, insulate it securely with heat insulator available in the market.
57 Gutter
171 Since this air-conditioner is designed to collect dew drops on the rear surface to the
254

36 -
drain pan, do not install the connecting wire above the gutter.

65 (Service Space)
Odor from
the gutter Wall

12.3
CAUTION
Higher than The drain hose Wavy The gap to the ground The drain hose tip
specified tip is in water. is 5 cm or less. is in the gutter. Incorrect drainage work can cause water leakage.
Pipe space

247.3
6. INSTALLING INDOOR UNIT

47
Indoor unit
Installation steps ● How to remove the indoor unit from the installation board

6.9
69 (1) Pass the pipe through the hole
443.5 (Gas pipe) (1) Push up at the marked portion of
Installation in the wall, and hook the upper
511.5 (Liquid pipe) the indoor unit base lower latch,
board
ain hose) ations) part of the indoor unit to the
Latch (2 loc and slightly pull it toward you.
Unit: mm installation board.

15 (Service Space)
(both right and left hand sides)
(The indoor unit base lower
latch can be removed from the
cause water leakage. (2) Gently push the lower part to installation board.)
Installation board secure the unit. (2) Push up the indoor unit upward
Wall The marked portion of the indoor
so that it can be removed from
the installation board. unit base lower latch

Indoor unit base lower latch

hole in the wall with putty.

7. CONNECTING PIPING WORK
ly, dust, insects, small animals,
r may enter the room from out- 1. Preparation of connecting pipe NOTE
sult in re or other hazards. 1.1. Selecting connecting pipe
Locations where relative humidity exceeds 70 %, both liquid and gas pipes need to be dressed with 20 mm or
Select connecting pipe according to the following table. thicker heat insulation materials.
Model DXK09/12 Model DXK15/18
'20 • SRK-T-320

hole in the wall with putty. SRK25/35 SRK45/50 CAUTION

ly, furniture and other xtures may LMK09/12 LMK15 • Improper insulation can cause condensate (water) formation during cooling operation.
ter leakage or condensation. Gas pipe ø9.52 ø12.7 Condensate can leak or drip causing damage to household property.
• Poor heat insulating capacity can cause pipe outer surface to reach high temperature during heat-
Liquid pipe ø6.35 ø6.35 ing operation. It can cause cable deterioration and personal injury.
• Pipe wall thickness must be greater than or equal to 0.8 mm.
• Pipe material must be O-type (Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30). 4. Finishing work
1.2. Cutting connecting pipe (1) Make sure that the exterior portion of connecting pipes, connecting cable and
drain hose is wrapped properly with tape. Shape the connecting pipes to match
(1) Cut the connecting pipe to the required length with pipe cutter. with the contours of the pipe assembly route.
ational or regional electrical standards. (2) Hold the pipe downward and remove the burrs. Make sure that no foreign material enters the pipe. (2) Fix the pipe assembly with the wall using clamps and screws. Pipe assembly Pipe
riate capacities are installed (3) Cover the connecting pipe ends with the tape. should be anchored every 1.5 m or less to isolate the vibration. assembly
(3) Install the service cover securely. Water may enter the unit if service cover is not (h) Screw
installed properly, resulting in unit malfunction and failure. (h) Clamp
2. Piping work
under any circumstances.
 443.5 (Gas pipe) (1) Push up at the marked portion of
Installation in the wall, and hook the upper
511.5 (Liquid pipe) the indoor unit base lower latch,
board
rain hose) at ions) part of the indoor unit to the
Latch (2 loc and slightly pull it toward you.
Unit: mm installation board.

15 (Service S
(both right and left hand sides)
(The indoor unit base lower
latch can be removed from the
cause water leakage. (2) Gently push the lower part to installation board.)
Installation board secure the unit. (2) Push up the indoor unit upward
Wall The marked portion of the indoor
so that it can be removed from
the installation board. unit base lower latch

Indoor unit base lower latch

e hole in the wall with putty.

7. CONNECTING PIPING WORK
rly, dust, insects, small animals,
ir may enter the room from out- 1. Preparation of connecting pipe NOTE
esult in re or other hazards. 1.1. Selecting connecting pipe
Locations where relative humidity exceeds 70 %, both liquid and gas pipes need to be dressed with 20 mm or
Select connecting pipe according to the following table. thicker heat insulation materials.
Model DXK09/12 Model DXK15/18
e hole in the wall with putty. SRK25/35 SRK45/50 CAUTION
rly, furniture and other xtures may LMK09/12 LMK15 • Improper insulation can cause condensate (water) formation during cooling operation.
ter leakage or condensation. Gas pipe ø9.52 ø12.7 Condensate can leak or drip causing damage to household property.
• Poor heat insulating capacity can cause pipe outer surface to reach high temperature during heat-
Liquid pipe ø6.35 ø6.35 ing operation. It can cause cable deterioration and personal injury.
• Pipe wall thickness must be greater than or equal to 0.8 mm.
• Pipe material must be O-type (Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30). 4. Finishing work
1.2. Cutting connecting pipe (1) Make sure that the exterior portion of connecting pipes, connecting cable and
drain hose is wrapped properly with tape. Shape the connecting pipes to match
(1) Cut the connecting pipe to the required length with pipe cutter. with the contours of the pipe assembly route.
ational or regional electrical standards. (2) Hold the pipe downward and remove the burrs. Make sure that no foreign material enters the pipe. (2) Fix the pipe assembly with the wall using clamps and screws. Pipe assembly Pipe
riate capacities are installed (3) Cover the connecting pipe ends with the tape. should be anchored every 1.5 m or less to isolate the vibration. assembly
(3) Install the service cover securely. Water may enter the unit if service cover is not (h) Screw
installed properly, resulting in unit malfunction and failure. (h) Clamp
2. Piping work
under any circumstances.
rmal overheat accident). 2.1. Flaring pipe
(1) Take out are nuts from the operation valves of indoor unit and engage them onto connecting pipes.
WARNING
(2) Flare the pipes according to table and gure shown below. • To avoid the risk of re or explosion, the ared connection Wall hole cover
breaker Circuit breaker Flare dimensions for R32 are different from those for conventional refrigerant. must/shall be installed outdoors. Seal hole with putty
Indoor
Although it is recommended to use the aring tools designed specically for R32 or R410A, conven- • Reusable mechanical connectors and ared joints are not
ent: 30 mA, Over current: 16 A unit
tional aring tools can also be used by adjusting the dimension B with a are adjustment gauge. allowed indoors.
Over current: 20 A
A Flared joint outside

B
Copper pipe Copper pipe B [ Rigid (clutch) type ]
A for indoor unit
outer diameter outer diameter Wall
Code on LABEL,WIRING R32 Conventional
F7 ø6.35 9.1 ø6.35
A F4
CAUTION
ø9.52 13.2 ø9.52 0-0.5 1.0-1.5 Make sure that the connecting pipes do not touch the components within the unit. If pipes touch the

-
internal components, it may generate abnormal sounds and/or vibrations.
ø12.7 16.6 ø12.7
n below. 5. Evacuation
2.2 Connecting pipes (1) Connect vacuum pump to gauge manifold. Connect charge hose of gauge manifold to service port of outdoor unit.
r wires of power source cable. (1) Connect pipes on both liquid and gas sides.

37 -
(2) Run the vacuum pump for at least one hour after the vacuum gauge shows -0.1 MPa (–76 cm Hg).
ower source cable. (2) Tighten nuts to specied torque shown in the table below. Liquid side (3) Conrm that the vacuum gauge indicator does not rise even if the system is left for 15 minutes or more.
cable. Gas side Vacuum gauge indicator will rise if the system has moisture left inside or has a leakage point.
each wire, outdoor and indoor side Operation valve size (mm) Tightening torque (N·m) Check the system for the leakage point. If leakage point is found, repair it and return to (1) again.
(4) Close the Handle Lo and stop the vacuum pump.
ce may work on terminal connections. ø6.35 (1/4") 14-18
When cables are connected, make (Do not turn) Keep this state for a few minutes to make sure that the compound pressure gauge pointer does not swing back.
ent box are free of loose connector ø9.52 (3/8") 34-42 (5) Remove valve caps from liquid operation valve and gas operation valve.
(6) Turn the liquid operation valve’s rod 90 degree counterclockwise with a hexagonal wrench key to open valve.
ø12.7 (1/2") 49-61 Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from indoor unit’s are and outdoor unit’s are and valve rods.
Wipe off all the water after completing the check.
CAUTION (7) Disconnect charging hose from gas operation valve’s service port and fully open liquid and gas
• Do not apply refrigerating machine oil to the ared surface. It can cause refrigerant leakage. operation valves. (Do not attempt to turn valve rod beyond its stop.)
• Do not apply excess torque to the ared nuts. The ared nuts may crack resulting in refrigerant (8) Tighten operation valve caps and service port cap to the specied torque shown in the table below.
leakage. Operation valve cap tightening Service port cap tightening
Operation valve size (mm)
3. Heating and condensation prevention torque (N·m) torque (N·m)
ø6.35 (1/4")
(1) Dress the connecting pipes (both liquid and gas pipes) with insulation to prevent it from heating 20-30
and dew condensation. ø9.52 (3/8") 10-12
Use the heat insulating material which can withstand 120 °C or higher temperature. Make sure ø12.7 (1/2") 25-35
that insulation is wrapped tightly around the pipes and no gap is left between them. Compound pressure gauge
(2) Wrap the refrigerant pipings of indoor unit with indoor unit heat insulation using tape. Pressure gauge
(3) Cover the are-connected joints (indoor side) with the indoor unit heat insulation and wrap it Handle Lo Gauge manifold
g cable Power source with an insulation pad (standard accessory provided with indoor unit).
cable (4) Wrap the connecting pipes, connecting cable and drain hose with the tape. Liquid operation valve Handle Hi
(2) (3) (4) Valve cap
Insulation pad Connecting cable
Tape Gas operation valve
Gas pipe Vacuum pump
Liquid pipe Service port
Tape
Charge hose
terior
rtion that goes through the wall. CAUTION
wiring with the piping.
Position it so that the slit area faces Insulation To prevent vacuum pump oil from entering into the refrigerant system, use a counterow prevention
upward. Drain hose adapter.
'20 • SRK-T-320

8. INSTALLATION CHECK AND TEST RUN

After nishing the installation work, check the following points again Before test run Test run
before turning on the power. Conduct a test run and ensure that the Before test run, check following points. Check following points during test run.
unit operates properly.
At the same time, explain to the customer how to use the unit and Power source voltage complies with the rated voltage of Indoor unit receives signal of remote control.
ly using a hexagonal wrench etc. how to take care of the unit following the user’s manual. air-conditioner. Air-conditioning operation is normal.
Earth leakage breaker and circuit breaker are installed. There is no abnormal noise.
(4)
NOTE Power cable and connecting cable are securely xed to Water drains out smoothly.
the terminal block.
During restart or change in operation mode, the unit will not start Display of remote control is normal.
Both liquid and gas operation valves are fully open.
 Handle Lo Gauge manifold
g cable Power source with an insulation pad (standard accessory provided with indoor unit).
cable (4) Wrap the connecting pipes, connecting cable and drain hose with the tape. Liquid operation valve Handle Hi
(2) (3) (4) Valve cap
Insulation pad Connecting cable
Tape Gas operation valve
Gas pipe Vacuum pump
Liquid pipe Service port
Tape
Charge hose
erior
rtion that goes through the wall. CAUTION
wiring with the piping.
Position it so that the slit area faces Insulation To prevent vacuum pump oil from entering into the refrigerant system, use a counterow prevention
upward. Drain hose adapter.

8. INSTALLATION CHECK AND TEST RUN

After nishing the installation work, check the following points again Before test run Test run
before turning on the power. Conduct a test run and ensure that the Before test run, check following points. Check following points during test run.
unit operates properly.
At the same time, explain to the customer how to use the unit and Power source voltage complies with the rated voltage of Indoor unit receives signal of remote control.
y using a hexagonal wrench etc. how to take care of the unit following the user’s manual. air-conditioner. Air-conditioning operation is normal.
Earth leakage breaker and circuit breaker are installed. There is no abnormal noise.
(4)
NOTE Power cable and connecting cable are securely xed to Water drains out smoothly.
the terminal block.
During restart or change in operation mode, the unit will not start Display of remote control is normal.
operating for approximately 3 minutes. This is to protect the unit Both liquid and gas operation valves are fully open.
and it is not malfunction. No gas leaks from the joints of the operation valves. After test run
Indoor and outdoor side pipe joints have been insulated. Explain the operating and maintenance methods to the
Hole on the wall is completely sealed with putty. user according to the user’s manual.
Drain hose and cap are installed properly. Keep this installation manual together with user’s
Screw of the lid is tightened securely. manual.
e.

8/18/2020 9:49:39 AM

-
38 -
'20 • SRK-T-320
 '20 • SRK-T-320

9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Operation control function by wireless remote control

Remote control
◆ Operation section

FAN SPEED button OPERATION MODE select button

Each time the button is pressed, the fan Each time the button is pressed, the
speed changes. mode changes.

HI POWER/ECONO button ON/OFF (luminous) button

This button changes the HIGH POWER/ Press to start operation, press again to
ECONOMY mode. stop.

AIR FLOW (UP/DOWN) button

This button changes the air flow
ON TIMER button (up/down) direction.
This button selects ON TIMER operation.
TEMPERATURE button
These buttons set the room temperature.
SLEEP button (These buttons are used for setting the
current time and timer function as well.)
This button selects SLEEP operation.

OFF TIMER button

CLEAN switch This button selects OFF TIMER

operation.
This switch selects the SELF CLEAN
mode.
ACL switch

CANCEL button This switch resets the program to default

state.
This button cancels the ON timer, OFF
timer, and SLEEP operation. • 
The above illustration shows all controls, but in
practice only the relevant parts are shown.

Name of each part and its function

Unit display section

Unit ON/OFF button RUN light (green)

This button can be used for turning on/off
the unit when a remote control is not available. • Illuminates during operation.
• Blinks slowly when SELF CLEAN operation
(3 seconds ON, 1 second OFF).

Wireless remote control signal receiver

• Blinks when air flow is stopped to

prevent blowing out of cold air in
heating operation (1.5 seconds ON,
0.5 seconds OFF).

TIMER light (yellow)

Illuminates during TIMER operation.

Accessories

Battery × 2 Allergen clear filter

(R03 (AAA, Micro)) (Light orange)

- 39 -
Filter holder × 2
Remote control Remote control Wood screw × 2 Photocatalytic washable
holder (for remote control holder mounting) deodorizing filter (Orange)

NOTE

• Buzzer sound for remote control

 '20 • SRK-T-320

(2) Unit ON/OFF button

When the wireless remote control batteries become weak, or if the wireless remote control is lost or malfunctioning, this
button may be used to turn the unit on and off.
(a) Operation
Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off.
(b) Details of operation
The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by
sensor), whether to go into the COOL, DRY or Heat modes.

Function Room temperature Fan Timer

setting speed Flap switch
Operation mode
COOL About 24ºC

DRY About 24ºC Auto Auto Continuous

Unit ON/OFF button
HEAT About 26ºC

(3) Auto restart function

(a) A
 uto restart function records the operational status of the air-conditioner immediately prior to be switched off by a
power cut, and then automatically resumes operations after the power has been restored.
(b) The following settings will be cancelled:
(i) Timer settings
(ii) HIGH POWER operation
Jumper wire (J1)

Notes (1) A
 uto restart function is set at on when the air-conditioner is shipped from the factory.
Consult with your dealer if this function needs to be switched off.
(2) W hen power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.
(3) If the jumper wire (J1) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right.)

(4) Installing two air-conditioners in the same room

When two air-conditioners are installed in the room, set the wireless
remote contrrol and indoor unit as belows to prevent operating air-condi-
tioners with one wireless remote control.
(a) Setting an indoor unit’s printed circuit board Jumper wire (J2)

(i) Take out the printed circuit board from the control box.
(ii) Disconnect jumper wire (J2) with wire cutters.
(iii) Install a printed circuit board.
(b) Setting a wireless remote control
(i) P
 ull out the cover and take out batteries.
(ii) Disconnect the switching line next to the battery with wire cutters.
(iii) Insert batteries. Close the cover.

Cut

- 40 -
 '20 • SRK-T-320

(5) High power operation

Pressing the HI POWER/ECONO button intensifies the operating power and initiates powerful cooling and heating operation for
15 minutes continuously. The wireless remote control displays HIGH POWER mark and the FAN SPEED display disappears.
(a) During the HIGH POWER operation, the room temperature is not controlled. When it causes an excessive cooling and hea-
ting, press the HI POWER/ECONO button again to cancel the HIGH POWER operation.
(b) HIGH POWER operation is not available during the DRY and the ON timer to OFF timer operations.
(c) When HIGH POWER operation is set after ON TIMER operation, HIGH POWER operation will start from the set time.
(d) When the following operation are set, HIGH POWER operation will be canceled.
① When the HI POWER/ECONO button is pressed again.
② When the operation mode is changed.
③ When it has been 15 minutes since HIGH POWER operation has started.
(e) Not operable while the air-conditioner is OFF.

(6) Economy operation

Pressing the HI POWER/ECONO button initiates a soft operation with the power suppressed in order to avoid an excessive
cooling or heating. The unit operates 1.5℃ higher than the setting temperature during cooling or 2.5℃ lower than that during
heating. The wireless remote control displays ECONO mark and the FAN SPEED display disappears.
(a) It will go into ECONOMY operation at the next time the air-conditioner runs in the following cases.
① When the air-conditioner is stopped by ON/OFF button during ECONOMY operation.
② When the air-conditioner is stopped in SLEEP or OFF TIMER operation during ECONOMY operation.
③ When the operation is retrieved from CLEAN operation.
(b) When the following operation are set, ECONOMY operation will be canceled.
① When the HI POWER/ECONO button is pressed again.
② When the operation mode is changed DRY to FAN.
(c) Not operable while the air-conditioner is OFF.
(d) The setting temperature is adjusted according to the following table.

Mode
Cooling Heating ① at the start of operation.
Item
①＋0.5 ①－1.0 ② one hour after the start of operation.
Temperature ③ two hours after the start of operation.
adjustment ②＋1.0 ②－2.0
③＋1.5 ③－2.5

(7) Air flow direction adjustment

Air flow direction can be adjusted with by AIR FLOW 
(UP/DOWN) button on the wireless remote control.
(a) Flap
Each time when you press the AIR FLOW 
(UP/DOWN) button the mode changes as follows.

(Flap stopped) (Swing)

Angle of flap from horizontal

Remote control
display
COOL, DRY, FAN Approx. 15° Approx. 25° Approx. 35° Approx. 45° Approx. 59°
HEAT Approx. 25° Approx. 35° Approx. 50° Approx. 59° Approx. 65°

- 41 -
 '20 • SRK-T-320

(b) Swing
Flap moves in upward and downward directions continuously.
◆ In HEAT operation ◆ In COOL, DRY, FAN operation

Approx.
20°

Approx. 35°

Approx. 59°

Approx. 65°

(c) Memory flap

When you press the AIR FLOW (UP/DOWN) button once while the flap is operating, it stops swinging at the position.
Since this angle is memorized in the microcomputer, the flap will automatically be set at this angle when the next opera-
tion is started.
(d) When not operating
The flap returns to the position of air flow directly below, when operation has stopped.

(8) Timer operation

(a) Comfortable timer setting (ON timer)
If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in
auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based
on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of
room temperature sensor) and the setting temperature.
(b) Sleep timer operation
Pressing the SLEEP button causes the temperature to be controlled with respect to the set temperature.
(c) OFF timer operation
The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period.

(9) Outline of heating operation

(a) Operation of major functional components in heating mode
Heating
Thermostat ON Thermostat OFF Defrost Failure
Compressor ON OFF OFF OFF
Indoor fan motor ON ON(HOT KEEP) OFF OFF
Outdoor fan motor ON OFF OFF OFF
(few minutes ON)
4-way valve ON ON OFF OFF
(3 minutes ON)

(b) Details of control at each operation mode (pattern)

(i) Fuzzy operation
Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed.
Model
SRK25ZSP-W SRK35ZSP-W SRK45, 50ZSP-W
Fan speed
AUTO 20-115rps 20-100rps
HI 20-115rps 20-100rps
MED 20-72rps 20-84rps 20-90rps
LO 20-54rps 20-62rps 20-58rps

When the defrost operation, protection device, etc. is actuated, operation is performed in the corresponding mode.

- 42 -
(16)ࠉOutline of heating operation
(9)ࠉOutline of heating operation
(a) Operation of major functional components in heating mode
(a) Operation of major functional components in heating mode
Heating
Thermostat ON Heating
Thermostat OFF Failure
Thermostat ON Thermostat OFF Failure
'20 • SRK-T-320
Compressor ON OFF OFF
Compressor
Indoor fan motor ON
ON ON(HOT OFF
KEEP)* OFF
OFF
Indoor fan motor ON ON(HOT
OFF KEEP) OFF
Outdoor fan motor ON OFF
(ii) Outdoor
Hot keep (few minutes
OFF ON)
fan operation
motor ON OFF
During the heating operation, ON
4-way valve the indoor
fan speed(few
canminutes ON)
be controlled
of the indoor heat ex-
ON based on OFF
the temperature
(3 minutes
OFFON)
4-way valve ON ON
changer (Th2) to prevent blowing of cold air.
*It can be set the indoor fan motor off or the heating thermostat OFF with connecting a wired remote control.
(3 minutes ON)

(c)InDefrost
the case, operation
indoor air temperature is detected by sensor on the wired remote control.
(b) Details of control at each operation mode (pattern)
(i) Fuzzy operation
1) satisfied.
(b) Details of control at each operation mode (pattern)
1)
(i) Fuzzy operation
35 (model SRK35 : 45) Total
2) Model
SRK20ZJ-S SRK25ZJ-S SRK35ZJ-S SRK50ZJ-S
Fan speed Model
35 (model SRK35 : 45)
SRK20ZS-S Total
SRK25ZS-S SRK35ZS-S SRK50ZS-S
Fan speed Auto 30~115rps 30~115rps 30~115rps 23~106rps
3)
HI
Auto 30~115rps
20~115rps 30~115rps
20~115rps 30~115rps
20~115rps 23~106rps
23~106rps
MED
HI －
30~66rps
20~115rps or less 30~72rps
20~115rps 30~76rps
20~115rps 23~78rps
23~106rps
4) The difference
MEDLO between the20~86rps
outdoor
30~40rps air temperature sensor temperature
30~42rps
20~104rps and the outdoor23~82rps
30~46rps
20~108rps heat exchanger temperature
23~50rps
sensor temperature
LO 20~70rps
is as follows. 20~84rps 20~96rps 23~70rps
ULO 20~44rps 20~54rps 20~60rps 23~37rps
2) Hot•0℃≦ keepTH2: TH2－TH1≧7℃, TH1≦TH2－7℃
operation
•－15℃≦TH2＜0℃: TH2－TH1≧2/15×TH2＋7℃, TH1≦13/15×TH2－7℃
(ii) Hot•TH2keep＜－15operation
℃: TH2－TH1≧－5℃, TH1≦TH2＋5℃
During the heating operation, the indoor fan speed can be controlled based on the temperature of the indoor heat
exchanger
(c) Defrosting (Th2) to prevent
operation blowing out of cold air.
5) Models LMK09, 12, 45,
SRK25, 35, 15Z6-W 50ZSP-W Model DXK15Z6-S
(i)
(c) Defrost operation 0 0
met.
(i) 1) are satisfied.)
1) 2) 3) 5) Outdoor heat exchanger temperature (℃)
Outdoor heat exchanger temperature (℃)

1) -5 35 (model DXK12 : 45) -5

－
2) (model SRK50 : 35) (Total compressor operation time)
－ re
2) After finish 35 operation
-10 of defrost (model DXK12 pe
ra
tu : 45) -10
(ii) t em
3) (modelon sSRK50
r t
: 35) (Total compressor operation time) erature
TH1

TH1

t a
1) ra
ti (LMK15 p : 10 )
pe tem
3) -15
s to
-15
sta
rt
ro
2) 4) De
f Defrost operation
start 16 minutes and 50 seconds ati
o (model LMK15
n 17 minutes
Defrost :operation
C or less for 3 minutes continuously. op
er start
and 30 seconds).
-20 (model DXK15 : 2-20
ࠉ) (model
fr o st
DXK15 : 10 ࠉ)
4) De

is as following. (model DXK15 : 2 ࠉ)

(model
-25 DXK15 : 10 ࠉ) higher -25
-20 -15 -10 -5 0 5 10 -20 -15 -10 -5 0 5 10
Outdoor air temperature (℃) Outdoor air temperature (℃)
TH2 TH2
5)
5)
In case satisfied all of following conditions. 1) 2) 3) 5)
• Connect compressor speed 0 rps 10 times or more.
• Satisfy 1), 2) and 3) conditions above.
• Outdoor air temperature is 3°C or less.
(ii)
(ii) satisfied.
is satisfied.)
1) (model SRK50 : 10 (SRK45,
) 50 : 10 )
operation → For more than 16
2) Continued operation time of defrost operation 16minutes
minutesand
and50
50seconds
seconds(model
(modelsSRK50
SRK45,
: 1850minutes).
:
17 minutes and 30 seconds).
Defrost operation

Heating operation
Max. 16 minutes and 50 seconds 2-7 minutes ͤ

(Models SRK45, 50 : Max.17 minutes and 30 seconds) Hot keep operation

ͤDepends on an operation condition, the time can be longer than 7 minutes.

- 43 -
 '20 • SRK-T-320

(10) Outline of cooling operation

(a) Operation of major functional components in cooling mode

Cooling
Thermostat ON Thermostat OFF Failure
Compressor ON OFF OFF
Indoor fan motor ON ON ON
Outdoor fan motor ON OFF OFF
(few minutes ON) (few minutes ON)
4-way valve OFF OFF OFF

(b) Detail of control in each mode (Pattern)

(i) Fuzzy operation
During the fuzzy operation, the air flow and the compressor speed are controlled by calculating the difference between
the room temperature setting correction temperature and the suction air temperature.
Model
SRK25ZSP-W SRK35ZSP-W SRK45ZSP-W SRK50ZSP-W
Fan speed
AUTO 15-74rps 15-98rps 20-97rps 20-100rps
HI 15-74rps 15-98rps 20-97rps 20-100rps
MED 15-52rps 15-74rps 20-72rps 20-72rps
LO 15-38rps 15-46rps 20-44rps 20-44rps

(11) Outline of automatic operation

(a) Determination of operation mode
The unit checks the indoor air temperature and the outdoor air temperature, determines the operation mode, and then
begins in the automatic operation.
Cooling
27.5

25.5

Indoor air temperature (˚C) A Dehumidifying

18.0

Heating

18 30
Outdoor air temperature (˚C)

(b) The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the pre-
vious operation mode, changes the operation mode.
(i) If the setting temperature is changed with the remote control, the operation mode is judged immediately.
(ii) When both the indoor and the outdoor air temperatures are in the range “A”, cooling or heating is switched depending
on the difference between the setting temperature and the indoor air temperature.
(iii) When the operation mode has been judged following the change of setting temperature with the remote control, the hour-
ly judgment of operation mode is cancelled.
(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is
selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the
signals of the wireless remote control and the setting temperature.
Signals of wireless remote control (Display)
–6 –5 –4 –3 –2 –1 ±0 +1 +2 +3 +4 +5 +6
Cooling 18 19 20 21 22 23 24 25 26 27 28 29 30
Setting
Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31
temperature
Heating 20 21 22 23 24 25 26 27 28 29 30 31 32

(e) When the unit is operated automatically with the wired remote control connected, the cooling operation is controlled ac-
cording to the display temperatures while the setting temperature is compensated by ＋ 1˚C during dehumidifying or by
＋ 2˚C during heating.

- 44 -
 '20 • SRK-T-320

(12) Protection control function

(a ) Dew prevention control Ⅰ [Cooling]
Prevents dewing on the indoor unit.
(i) Operating conditions
When the following conditions have been satisfied
1) Humidity is 78% or higher.
(ii) Contents of operation
Maximum compressor speed
SRK25ZSP-W 68 rps
SRK35ZSP-W 73 rps
SRK45ZSP-W 87 rps
SRK50ZSP-W 87 rps

(iii) Reset condition

When either of the following condition is satisfied
1) Humidity is 73% or less.
2) Dew prevention control Ⅱ has been satisfied.
(b) Dew prevention control Ⅱ [Cooling]
Prevents dewing on the indoor unit.
(i) Operating conditions
When the following conditions have been satisfied for more than 30 minutes after starting operation
1) Compressor speed is 32 rps or higher. (SRK25, 35)
2) Humidity is 68% or higher. (SRK45, 50 : 60%)
(ii) Contents of operation
1) Air capacity control
Model
SRK25, 35ZSP-W SRK45, 50ZSP-W
Item
Upper limit of compressor speed RangeA: 41rps, RangeB: 41rps RangeA: 57rps, RangeB: 39rps
LO
Indoor fan 4th speed (SRK35 : 5th speed)

Upper limit of compressor speed RangeA: 41rps, RangeB: 41rps RangeA: 57rps, RangeB: 39rps
AUTO,HI,MED
Adaptable to compressor
Indoor fan speed (Lower limit 4th speed)
Note (1) Ranges A and B are as shown below.
Range B

Range A

68 73
Humidity(%)

2) When this control has continued for more than 30 minutes continuously,the following wind direction control is per-
formed.
a) When the vertical wind direction is set at other than the vertical swing,the flaps change to the horizontal position.
b) When the horizontal wind direction is set at other than the horizontal swing,the louver changes to the vertical po-
sition.
(iii) Reset condition
When any of followings is satisfied
Humidity is less than 63%. (SRK45, 50 : 55%)

- 45 -
 '09•SRK-DB-087D

'20 • SRK-T-320

(c) Frost prevention control

(i) Operating conditions
1)
compressor
2) speed
(ii) Detail of anti-frost operation Lower
Indoor heat exchanger limit
temperature 5°C or lower 2.5°C or lower speed
Item
Lower limit of compressor speed 22rps (SRK45, 50 : 23 rps) 0 rps
Indoor fan 2.5 5 8
Outdoor fan compressor Indoor heat exchanger
4-way valve temperature (ºC)
-

(iii) Reset conditions

1)
2)
(d)
(c) Cooling
Coolingoverload
overloadprotective
protectivecontrol
control
(i) (i)
Operating conditions
Operating conditions:
When the outdoor air temperature (TH2)
more, has become
or 47ºC or morecontinuously
(model SRK50for: 41ºC
30 seconds at 41ºC
or more) or more,
with the or 47ºC
compressor or morethe lower
running,
with the compressor running, the lower limit speed of compressor is brought up.
limit
Model
Model SRK25, 35ZSP-W SRK45, 50ZSP-W
Item SRK20~35ZJ-S SRK50ZJ-S
Item
Outdoor air temperature 41°C or more 47°C or more 41°C or more 47°C or more
Outdoor air temperature 41°C or more
Lower limit speed 30 rps 45 rps 27 rps 35 rps
Lower limit speed 29 rps
(ii) (ii)
Detail of operation
Detail of operation
1) The1)outdoor fan is stepped up by 3 speed step. (Upper limit; 8th speed.)
2) The2)lower
Thelimit
loweroflimit
compressor speed iscommand
of compressor set to 30 or 45(models
speed is set toSRK45,50 : 27 or SRK50
30 or 40 (model 35 rps).:However, when
29) rps and eventheif thermo
the calculated
OFF, the speed is reduced to 0 rps.
result becomes lower than that after fuzzy calculation, the speed is kept to 30 or 40 (model SRK50 : 29) rps. Howev-
(iii) Reset conditions
er, when the thermo OFF, the speed is reduced to 0 rps.
When either of the following condition is satisfied
(iii) Reset conditions:
1) The outdoor air temperature is lower than 40ºC.
1)
2) The compressor speed is 0 rps.
2)
( e) Cooling high pressure control
(d) Cooling high pressure control
(i) Purpose
(i) Purpose:
Prevents anomalous high pressure operation during cooling.
(ii) Detector:
(ii) Detector
(iii) Detail of operation:
Outdoor heat exchanger temperature sensor (TH1)
(Example) Fuzzy
(iii) Detail of operation After lapse of 30 sec. or over
(3)
6rps
(1)

6rps
(1)
After lapse of 30 sec. or over
(3)

(Example) Fuzzy
After lapse lower limit 8rps(1)
After of 20 sec.
of 30orsec.
overor over(3)
(3)
lapse speed 30 (model SRK50 : 29) rps
After lapse of 20 sec. or over(3) 0rps 8rps(1)

After lapse of 20 sec. or over

(3)

0rps
53 58 63
Outdoor heat exchanger temperature (°C)
A B C
Outdoor heat exchanger temperature(°C)

- 46 -
 '20 • SRK-T-320

Notes (1) When the outdoor heat exchanger temperature is in the range of B-C ºC, the speed is reduced by 8 rps at each 20 seconds.
(2) When the temperature is C ºC or higher, the compressor is stopped.
(3) When the outdoor heat exchanger temperature is in the range of A-B ºC, if the compressor speed is been maintained and the operation has
continued for more than 20 seconds at the same speed, it returns to the normal cooling operation.
● Temperature list
SRK25, 35 SRK45, 50
A B C A B C
Outdoor air temperature > 53 58 63 48 53
'09•SRK-DB-087D
55
= 32 ºC
Outdoor air temperature < 32 ºC 40 43 46 53 58 63

( f ) Cooling low outdoor air temperature protective control

'09•SRK-DB-087D
(i) Operating
(e) Cooling conditions
low outdoor air temperature protective control
(i) Operating conditions
When the outdoor air temperature (TH2) is 22°C or lower continues for 20 seconds while the compressor speed is other than 0 rps.
(ii) Detail of operation
operation:
1) It controls the upper and lower limit values for the compressor speed 44
according to the following table.
2) It checks the 50
than outdoor temperature
44 <44> (TH2)
(30) rps, once every
the speed hour
is kept to to
50judge the operation
44 <44> range.
(30) rps. However, when the thermo OFF, the
speed is
Compressor speed: Upper/lower limit (rps)
2) Lower 1
Upper 1 Lower 2 Upper 2 Lower 3 Upper 3
Range B Range A
SRK25, 35 30 Release 60 44 50 50 50
A B
SRK45, 50 27 Release 60 C 44 D 50 44 50
(3) Values in are for the model DXK15.
ON Upper 3
Lowerlimit
Upper
ON Upper
ON 3 50
limit 50 rps
rps
Lower limit
Lower limit 50
50ࠝ44ࠞ
ࠝ44ࠞ ONrpsUpper 2
rps
Lowerlimit
Upper
ON Upper
ON 2 50
limit 50 rps
rps
Lower limit
Lower limit 44
44 rps
rpsON Upper 1
Lowerlimit
Upper
ON Upper
ON 1 60
limit 60 rps
rps
Range A
Lower limit
Lower limit 30
30ࠝ27ࠞ
rps rps
Range A
Range B
OFF Range B
OFF
OFF
E F A B C D 24 26
Outdoor air
A temperature
C(°C) D 24 26 ( Υ)
Indoor air temperature
EE FF A BB C D
Outdoor air
Outdoor air temperature.(°C
temperature (°C)) Indoor air temperature ( Υ)
(Models SRK25, 35) (Model SRK45, 50)
(Models DXK09,
(Models SRK25, 35)
12) , E,, E,
F (Models
F (ModelSRK45,
DXK15)50)
Outdoor air temperature (˚C) Outdoor air temperature (˚C)
Outdoor
Outdoorairair
temperature (˚C) Outdoor air air
temperature (˚C)
E F A temperature
B (˚C)
C D A Outdoor
B temperature
C D (˚C)
EE FF AA BB CC DD E E F F A A B B C C D D
First time First time 9 11
First
First time
Aftertime First time
First time 0 0 2 9 11 11 22 22 25 25
the After the 16 2 19 9
second
After
After thetimes
the second
After thethetimes 5 5
After 7 7 16 16 19 19 25 25 28 28
second times
second times second
secondtimes
times
(iii) Reset conditions
(iii) Reset conditions
conditions:
When either of the following condition is satisfied.
1) 1) The outdoor air temperature (TH2) is D°C or higher.
1)2)
2) The compressor speed is 0 rps.
2)
(f ) Heating
Heating high pressure
pressure control
control
(f) high
(i)
(g) Purpose
(i)Heating high pressure control
Purpose:
(i) Purpose
(ii) Detector:
(ii) Detector
(iii) Detail of operation:
(ii) Detector
(Example) Fuzzy
(iii) Detail of operation After lapse of 10 sec. or over(3) 4rps(1) 8rps(2)
After lapse of 10 sec. or over(3) 4rps(1) 8rps(2)
(iii) Detail of operation
(Example) lower limit (1)
After
Afterlapse
lapseof
of10
20sec.
sec.or
orover
over
(3)
(3)
4rps
speed 30 rps 8rps(2)
Compressor
(Example) Fuzzy After lapse of 20 sec. or over (3)
4rps (1) 0rps
8rps (2)

speed After lapse of 10 sec. or over(3)(3) 4rps(1)

lower limit
8rps(2) Note (1) Value in ( ) are for the model SRK50.
After lapse of 20 sec. or over speed 30(23) rps
After lapse of 10 sec. or over(3) 4rps(1) 8rps(2)
A B limit C D 0rps
After lapse of 10 sec. or over lower30(35)
(3)

Indoor heat exchangerspeedtemperature(°C) rps

0rps
A B C D
Indoor heat exchanger temperature(°C)
A B B-C C D
Indoor heat exchanger Ctemperature(°C)
-D
10
-
When the indoor heat exchanger temperature is in the range of A-B °C, if the compressor
- speed is been maintained and the operation has continued for more
Temperature list
than 20 seconds at the same speed, it returns to the normal heating operation.
fan speed - fan
Models DXK09.12
Temperature list fan
10
A
-
B
47 - C D
speed fan
Models
RPSmin SRK20,
< 50
Temperature 25, 35
list 52 54 55
50 <
= RPSmin < 91 A 54.5
B C D
Models DXK09.12
91 <
= RPSmin
RPSmin < 50< 97 48 54.5 5351.5 55 58
A B C D
50<
97 =<
=RPSmin
RPSmin<<100
91 48.5 51.5 5650 58 61
RPSmin < 50 52 54 55
100 <<
= RPSmin<<97
91 = RPSmin 115 48.5 50 - 52.5
56 58 61
50 <= RPSmin < 91 54.5
97 <<
115 RPSmin< 100
=RPSmin 48.5 52.5 - 50.8 58 - 56.2 61
(iii) Detail of operation

(Example) Fuzzy
After lapse of 10 sec. or over(3) 4rps(1) 8rps(2)
After lapse of 10 sec. or over (3)
4rps (1)
8rps(2)
lower limit
After lapse of 10 sec. or over (3)
speed 30(35) rps

0rps
'20 • SRK-T-320
A B C D
Indoor heat exchanger temperature(°C)
-
-

-
10
fan speed fan
Temperature list
● Temperature list
Models DXK09.12
Models SRK25, 35 Unit : ºC
A B C D
A B C D
RPSminRPSmin
< 50 < 50 47 52 52 54 54 55 55
50 < 50 <
= RPSmin < 91 < 92
= RPSmin 47.5 54.5 55 57 61
91 < 92 <
RPSmin
= < 97 <
RPSmin = 115 47.5-39.0 54.5-51.555.0-40.0 57.0-42.0 61
=
97 <
= RPSmin < 100 51.5-50 -
100 < Models SRK45, 50 - 50- - Unit : ºC  Unit : ºC
'09•SRK-DB-087D
= RPSmin < 115
<
115 = RPSmin A B C D
RPSmin < 30 45 49 50 RPSmin < 35 55.5
30 <
= RPSmin < 40 45-49 49-55 50-57 35 <
= RPSmin < 40 55.5-62
40 <
= RPSmin < 80 49 55 57 40 <
= RPSmin < 80 62
80 <
= RPSmin < 90 49-48 55-53 57-55 80 <
= RPSmin < 95 62-56
90 <
= RPSmin < 100 48-37 53-42 55-44 95 <
= RPSmin < 100 56-50.5

(h) Heating overload protective control

(i) Indoor unit side
1) Operating conditions

2) Detail of operation

3) Reset conditions

(ii) Outdoor unit side

1) Operating conditions
When the outdoor air temperature (TH2) is 22 (11 or 20)ºC or higher continues for 30 seconds while the compressor
speed other than 0 rps.

2) Detail of operation
b) Detail
Upper of operation
and lower limits of compressor speed and the outdoor unit fan speed are restricted.
i) Taking the upper limit of compressor command speed range at 60 rps, if the output speed obtained with the fuzzy
Models SRK25, 35
calculation
Compressor exceeds
command speedthe upper limit, the upper limit value is maintained.
(rps)
Thelimit
ii)Lower lower limitUpper
of compressor
limit command
Outdoor speed is set to 40 rps and even if the calculated result becomes lower than
fan speed
Range A Range B
that after fuzzy calculation, the speed is kept to 40 rps. However, when thethermo becomes OFF, the speed is
ON1 － － － －
ON2 40 reduced to 0 prs. 60
Release 2nd speed
iii) 50
Models SRK45,
rps.
Compressor command speed (rps)
Lower limit Outdoor fan speed
iv) Upper limit
Range A Range B
ON1 35 Release 85 It depends on compressor speed
Protective
ON2 35 35 55 2nd speed control

Protective Normal
ON2operation
control
Range A
ON1
Normal
operation Range B
OFF 21 22
10 11 21 (19) 22 (20) Outdoor air temperature(°C)
21 23
Outdoor air temperature(°C) Indoor air temperature ( Υ)
c) Reset conditions: .
3) Reset
• Model 50 conditions
When the outdoor air temperature drops below 19 (13)ºC.
a) Operating conditions : When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while
Note (1) Values in ( ) are for the model SRK45, 50.
the compressor command speed other than 0 rps.
b) Detail of operation
- 48 -
i) Taking the upper limit of compressor command speed range at 78 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
ii) The lower limit of compressor command speed is set to 30 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 30 rps. However, when thethermo becomes OFF, the speed is
reduced to 0 prs.
iii)
 Protective control ON1

Normal operation

10 11 19 20 '20 • SRK-T-320
Outdoor air temperature(°C)
c) Reset conditions: 10 .
( i ) Heating low outdoor temperature protective control
(i) Protective control I
1) Operating conditions
2 (-8) lower

2) Detail of operation
changed as shown in the figure below.
Models SRK25, 35 Models SRK45, 50
Lower limit 45(55) rps
Lower limit 27 rps
Lower limit 40 rps
Lower limit 38(40) rps Normal operation
Normal operation
-10 -8 0 2 4 -8 -6
Outdoor air temperature(°C ) Outdoor air temperature(°C )

3) Reset conditions

a) 4 (-6)
b)
• Model 50 Note (1) Values in ( ) are for the model SRK35.

1)ࠉOperating conditions: When the outdoor air temperature (TH2) is lower than 4ºC or higher continues for 30 seconds
( j ) Compressor overheat protection
while the compressor command speed is other than 0 rps.
(i) 2)ࠉDetail
Purpose of operation: The lower limit compressor command speed is change as shown in the figure belo.
It is designedLower
to prevent deterioration
limit 29 rps of oil, burnout of motor coil and other trouble resulting from the compressor over-
heat.
(ii) Detail of operation Normal operation
1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe.
4 6
(Example) Fuzzy
Outdoor air of
After lapse temperature(°C)
60 seconds. or over (3) 4 rps (1)
(3)
After lapse of 60 seconds. or over 4 rps

After lapse of 60 seconds. or over (3) Lower limit (4)

0 rps

90 100 110
Discharge pipe temperature (˚C)

Notes (1) When the discharge pipe temperature is in the range of 100 to 110 ºC, the speed is reduced by 4 rps.
(2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4
rps.
(3) If the discharge pipe temperature is in the range of 90-100ºC even when the compressor speed is maintained for 60 second when the tempera-
ture is in the range of 90-100ºC, the speed is raised by 1 rps and kept at that speed for 60 second. This process is repeated until the compres-
sor speed is reached.
(4) Lower limit speed

Cooling Heating
Models SRK25, 35 15 rps 20 rps
Models SRK45, 50 20 rps 30rps

- 49 -
 '20 • SRK-T-320

2) If the temperature of 110ºC is detected by the sensor on the discharge pipe, then the compressor will stop immediately.
When the discharge pipe temperature drops and 3 minutes has elapsed, the unit starts again within 1 hour but there
is no start at the third time.

(k) Current safe

(i) Purpose
Current is controlled not to exceed the upper limit of the setting operation current.
(ii) Detail of operation
Input current to the converter is monitored with the current sensor fixed on the printed circuit board of the outdoor
unit and, if the operation current value reaches the limiting current value, the compressor speed is reduced.
If the mechanism is actuated when the compressor speed is less than 30 rps, the compressor is stopped immediately.
Operation starts again after 3 minutes.

( l ) Current cut
(i) Purpose
Inverter is protected from overcurrent.
(ii) Detail of operation
Output current from the inverter is monitored with a shunt resistor and, if the current exceeds the setting value, the
compressor is stopped immediately. Operation starts again after 3 minutes.

(m) Outdoor unit failure

This is a function for determining when there is trouble with the outdoor unit during air-conditioning.
The compressor is stopped if any one of the following in item (i), (ii) is satisfied. Once the unit is stopped by this func-
tion, it is not restarted.
(i) When the input current is measured at 1 A or less for 3 continuous minutes or more.
(ii) If the outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on.

( n) Indoor fan motor protection

When the air-conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300
min-1 or under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system.

(o) Serial signal transmission error protection

(i) Purpose

(ii) Detail of operation

(p) Rotor lock

(p ) Rotor lock

(q) Outdoor fan motor protection

(q ) Outdoor fan motor protection min-1
min-1
( r ) Outdoor fan control at low outdoor temperature
( r ) Outdoor fan control at low outdoor temperature
(i) Cooling
(i) Cooling
1) Operating conditions
1) Operating conditions

2) Detail of operation
2) Detail of operation

- 50 -
Outdoor fan
Outdoor fan
Outdoor temperature > 10˚C
Outdoor temperature > 10˚C
Outdoor temperature <
= 10˚C
Outdoor temperature <
= 10˚C
a)
(p ) Rotor lock

(q ) Outdoor fan motor protection '20 • SRK-T-320

min-1

( r ) Outdoor fan control at low outdoor temperature

(i) Cooling
1) Operating conditions

2) Detail of operation

N
Outdoor fan

Outdoor temperature > 10˚C

Outdoor temperature <

= 10˚C

a)
-

b)

-
c)

3) Reset conditions

a) 24
b)
(ii) Heating
1) Operating conditions
(models SRK45, 50:0 )

2) Detail of operation
; models SRK25, 35 : refer to belows,
models SRK45, 50 : 8th speed)
ON2
SRK25, 35 Th1<21℃ = 21℃
Th1 >
ON1 8th speed 8th speed ON1
ON2 9th(8th) speed 8th speed
OFF
-1 1 4 6
Outdoor air temperature(°C )
Values in ( ) are for the model SRK35.

3) Reset conditions

a) (models SRK45, 50:2 )

b)

(s ) Refrigeration cycle system protection

(i) Starting conditions
1) When 5 minutes have elapsed after the compressor ON or the completion of the defrost operation
2) Other than the defrost operation
3) When, after satisfying the conditions of 1) and 2) above, the compressor speed, indoor air temperature (Th1) and indoor
heat exchanger temperature (Th2) have satisfied the conditions in the following table for 10 (SRK45, 50 : 5) minutes:
Room temperature (Th1)/
Operation mode Compressor speed (N) Indoor 51
- air temperature
- (Th1)
Indoor heat exchanger temperature (Th2)
Cooling 50 <
=N 10 <
= Th1<
= 40 Th1−4<Th2
Heating(1) 50 <
=N 0<
= Th1<
= 40 Th2<Th1+6
Except that the fan speed is HI in heating operation.
 OFF
-1 1 4 6
Outdoor air temperature(°C )
Values in ( ) are for the model SRK35.

3) Reset conditions
'20 • SRK-T-320
a) (models SRK45, 50:2 )
b)

(s ) Refrigeration cycle system protection

(i) Starting conditions
1) When 5 minutes have elapsed after the compressor ON or the completion of the defrost operation
2) Other than the defrost operation
3) When, after satisfying the conditions of 1) and 2) above, the compressor speed, indoor air temperature (Th1) and indoor
heat exchanger temperature (Th2) have satisfied the conditions in the following table for 10 (SRK45, 50 : 5) minutes:
Room temperature (Th1)/
Operation mode Compressor speed (N) Indoor air temperature (Th1)
Indoor heat exchanger temperature (Th2)
Cooling 50 <
=N 10 <
= Th1<
= 40 Th1−4<Th2
Heating(1) 50 <
=N 0<
= Th1<
= 40 Th2<Th1+6
Except that the fan speed is HI in heating operation.

(ii) Contents of control

1) When the conditions of (i) above are satisfied, the compressor stops.
2) Error stop occurs when the compressor has stopped 3 times within 60 minutes.
(iii) Reset condition
When the compressor has been turned OFF.

- 52 -
 '20 • SRK-T-320

10. MAINTENANCE DATA

(1) Cautions
(a) If you are disassembling and checking an air-conditioner, be sure to turn off the power before beginning. When working on
indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an out-
door unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after
discharging this electrical charge (to DC 10 V or lower).
(b) When taking out printed circuit boards, be sure to do so without exerting force on the circuit boards or package components.
(c) When disconnecting and connecting connectors, take hold of the connector housing and do not pull on the lead wires.
(2) Items to check before troubleshooting
(a) Have you thoroughly investigated the details of the trouble which the customer is complaining about?
(b) Is the air-conditioner running? Is it displaying any self-diagnosis information?
(c) Is a power source with the correct voltage connected?
(d) Are the control lines connecting the indoor and outdoor units wired correctly and connected securely?
(e) Is the outdoor unit’s service valve open?
(3) Troubleshooting procedure (If the air-conditioner does not run at all)
If the air-conditioner does not run at all, diagnose the trouble using the following troubleshooting procedure. If the air-condi-
tioner is running but breaks down, proceed to troubleshooting step (4).
Important When all the following conditions are satisfied, we say that the air-conditioner will not run at all.
(a) The RUN light does not light up.
(b) The flaps do not open.
(c) The indoor unit fan motors do not run.
(d) The self-diagnosis display does not function.

Troubleshooting procedure (If the air-conditioner does not run at all) * If the voltage is correct, it will be
within the following voltage range.
AC 198-264 V
Is the correct voltage Make sure the correct volt-
connected for the power NO
age is connected, then per-
source? form an operation check.
YES

With the power off, do

the flaps open manually, NO Is the current fuse on the in- YES
then close again when door unit PCB blown?
the power is turned on?
NO
YES
Proceed to the indoor unit If the package components
PCB check. are not damaged, replace
the fuse and perform an op-
Is there a reception sound
NO eration check again.
emitted from the unit
when it is operated by the
wireless remote control?
YES

Replace the indoor unit PCB Proceed to the wireless remote

and perform an operation control troubleshooting proce-
check. dure.

- 53 -
 '20 • SRK-T-320

(4) Troubleshooting procedure (If the air-conditioner runs)

Confirm the contents of the customer complaint.

NO The cause of the trouble can YES

be specifically identified.

Check the self-diagnosis display. Eliminate the cause of the trouble and perform an
operation check.
See page 55.

Is an error code displayed by NO Using the service mode, access the self-diagnosis
the self-diagnosis function? displays generated in the past.

YES See pages 56-62.

YES Is there a history of self-di-

agnosis display items?
NO

Using the service mode, access the stop history due

to protection control generated in the past.
See pages 56-62.

YES Is there a history of stops due

to protection control? (1)
NO

Identify the faulty component by using the check

procedure corresponding to the content of the trouble.

Replace the faulty component, then perform an The air-conditioning system is operating normally.
operation check.

Note (1) Even in cases where only intermittent stop data are generated, the air-conditioning system is normal. However, if the same protective operation
recurs repeatedly (3 or more times), it will lead to customer complaints. Judge the conditions in comparison with the contents of the complaints.

- 54 -
 '20 • SRK-T-320

(5) Self-diagnosis table

When this air-conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flash-
ing of display lights. If the air-conditioner is operated using the wireless remote control 3 minutes or more after the emergen-
cy stop, the trouble display stops and the air-conditioner resumes operation. (1)

Indoor unit display section

Description Cause Display (flashing) condition
RUN TIMER of trouble
light light
• Broken heat exchanger temperature When a heat exchanger temperature sensor wire disconnection is detected while
1‐time Indoor heat exchanger sensor wire, poor connector operation is stopped. (If a temperature of –28ºC or lower is detected for 15
ON connection seconds, it is judged that the wire is disconnected.)
flash temperature sensor error
• Indoor unit PCB is faulty (Not displayed during operation.)

• Broken room temperature When a room temperature sensor wire disconnection is detected while operation
2‐time Room sensor wire, poor connector is stopped. (If a temperature of –45ºC or lower is detected for 15 seconds, it is
ON temperature connection judged that the wire is disconnected.)
flash sensor error • Indoor unit PCB is faulty (Not displayed during operation.)

5‐time Active filter When the wrong voltage connected for the power source.
ON voltage error • Defective active filter When the outdoor unit PCB is faulty.
flash

When conditions for turning the indoor unit’s fan motor on exist during air-
6‐time Indoor fan • Defective fan motor, poor
ON conditioner operation, an indoor unit fan motor speed of 300 min-1 or lower is
flash motor error connector connection
measured for 30 seconds or longer. (The air-conditioner stops.)
Refrigeration
7‐time cycle system • Service valve is closed.
ON When refrigeration cycle system protective control operates.
flash protective • Refrigerant is insufficient
control
• Broken outdoor air temperature -55℃ or lower is detected for 5 seconds continuously 3 times within 40 minutes
Outdoor air sensor wire, poor connector
Keeps 1‐time temperature
after initial detection of this anomalous temperature.
flashing flash connection Or -55℃ or higher is detected for within 20 seconds after power ON.
sensor error • Outdoor unit PCB is faulty (The compressor is stopped.)
Outdoor heat • Broken heat exchanger temperature -55℃ or lower is detected for 5 seconds continuously 3 times within 40 minutes
Keeps 2‐time exchanger sensor wire, poor connector after initial detection of this anomalous temperature.
flashing flash temperature connection Or -55℃ or higher is detected for within 20 seconds after power ON.
sensor error • Outdoor unit PCB is faulty (The compressor is stopped.)

• Broken discharge pipe temperature

Discharge pipe -25℃ or lower is detected for 5 seconds continuously 3 times within 40 minutes
Keeps 4‐time sensor wire, poor connector
temperature after initial detection of this anomalous temperature.
flashing flash connection
sensor error (The compressor is stopped.)
• Outdoor unit PCB is faulty

• Compressor locking, open The compressor output current (compressor motor current) exceeds the set value
1‐time phase on compressor output, during compressor start.
ON Current cut short-circuit on power
flash (The air-conditioner stops.)
transistor, closed service valve
When there is an emergency stop caused by trouble in the outdoor unit, or the
2‐time Trouble of • Broken compressor wire
ON outdoor unit • Compressor blockage input current value is found to be lower than the set value.
flash (The air-conditioner stops.)

• Overload operation
3‐time Current safe When the compressor speed is lower than the set value and the current safe has
ON • Overcharge
flash stop operated. (The compressor is stopped.)
• Compressor locking
When there is an emergency stop caused by trouble in the outdoor unit, or the
4‐time Power transistor input current value is found to be lower than the set value continuously for 3
ON • Broken power transistor
flash error minutes or longer.
(The compressor is stopped.)

• Gas shortage, defective

5‐time Over heat of When the value of the discharge pipe temperature sensor exceeds the set value.
ON discharge pipe temperature
flash compressor (The air-conditioner stops.)
sensor, closed service valve
When there is no signal between the indoor unit PCB and outdoor unit PCB for
• Defective power source,
6‐time Error of signal 10 seconds or longer (when the power is turned on), or when there is no signal
ON Broken signal wire, defective
flash transmission for 7 minutes 35 seconds or longer (during operation)
indoor/outdoor unit PCB
(The compressor is stopped).

7‐time Outdoor fan • Defective fan motor, poor When the outdoor unit’s fan motor sped continues for 30 seconds or longer at
ON motor error connector connection 75 min-1 or lower. (3 times) (The air-conditioner stops.)
flash

• Overload operation, overcharge

Keeps Cooling high • Broken outdoor heat exchange When the value of the outdoor heat exchanger temperature sensor exceeds the
ON flashing pressure temperature sensor wire set value.
protection • Service valve is closed.

• Defective compressor If the compressor motor’s magnetic pole positions cannot be correctly detected
2‐time 2‐time when the compressor starts.
Rotor lock • Open phase on compressor
flash flash • Defective outdoor unit PCB (The air-conditioner stops.)

Note (1) The air-conditioner cannot be restarted using the wireless remote control for 3 minutes after operation stops.

- 55 -
 '20 • SRK-T-320

(6) Service mode (Trouble mode access function)

This air-conditioner is capable of recording error displays and protective stops (service data) which have occurred in the
past. If self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble oc-
curred by checking these service data.
(a) Explanation of terms
Term Explanation
The service mode is the mode where service data are displayed by flashing of the display lights
Service mode
when the operations in item (b) below are performed with the indoor control.
These are the contents of error displays and protective stops which occurred in the past in the air-
conditioner system. Error display contents and protective stop data from past anomalous
Service data operations of the air-conditioner system are saved in the indoor unit control’s non-volatile
memory (memory which is not erased when the power goes off). There are two types of data,
self-diagnosis data and stop data, described below.
These are the data which display the reason why a stop occurred when an error display (self-
diagnosis display) occurred in an indoor unit. Data are recorded for up to 5 previous occurrences.
Data which are older than the 5th previous occurrence are erased.
Self-diagnosis data In addition, data on the temperature of each sensor (room temperature, indoor heat exchanger,
outdoor heat exchanger, outdoor air temperature, discharge pipe), wireless remote control
information (operation switching, fan speed switching) are recorded when trouble occurs, so more
detailed information can be checked.
These are the data which display the reason by a stop occurred when the air-conditioning system
performed protective stops, etc. in the past. Even if stop data alone are generated, the system
restarts automatically. (After executing the stop mode while the display is normal, the system
restarts automatically.) Data for up to 10 previous occasions are stored. Data older than the 10th
Stop data
previous occasion are erased.
( Important) In cases where transient stop data only are generated, the air-conditioner system
may still be normal. However, if the same protective stop occurs frequently (3 or
more times), it could lead to customer complaints.

(b) Service mode display procedure

Start

Turn off the air-conditioner’s power once, then

wait 1 minute or longer.

Turn the air-conditioner’s power on again while

pressing the unit ON/OFF button.

*1: If the buzzer does not sound no matter how

NO (*1) Did a buzzer located in many times you repeat the operation, the
the indoor unit sound? unit ON/OFF button may be faulty.
YES
Within 1 minute after turning the air-condition- *2: Set the wireless remote control’s settings on
er’s power on, signals will be sent from the “Cooling operation,” “Fan speed: MED” and
remote control. (*2) “Set temperature: 21ºC.”

Count the number of times the RUN light and

TIMER light flash (*3), and check the contents of the
error, etc. from the table. (See pages 59.)

Turn off the air-conditioner’s power to terminate the

NO
Are other data displayed? service mode. If you are going to turn the power on
again, wait 1 minute or longer after turning it off.
YES
Change the wireless remote control settings based
on the instructions in the table (*4). (See page 57.)

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 '20 • SRK-T-320

*3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second
initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of
flashes.)
• In the case of current cut (example: stop code “42”)
The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
4 × 10 + 2 × 1 = 42 → From the table, read the instructions for error code 42, “current cut”.
1.5 sec.
ON
RUN light
(10’s digit)
OFF
0.5 sec. 0.5 sec.
ON
TIMER light
(1’s digit)
OFF
11-second interval

*4: When in the service mode, when the remote control settings (operation switching, fan speed switching, temperature
setting) are set as shown in the following table and sent to the air-conditioner unit, the unit switches to display of service data.
① Self-diagnosis data
What are Self-diagnosis data?
These are control data (reasons for stops, temperature at each sensor, wireless remote control information) from the time when
there were error displays (abnormal stops) in the indoor unit in the past. Data from up to 5 previous occasions are stored in
memory. Data older than the 5th previous occasion are erased. The temperature setting indicates how many occasions previous
to the present setting the error display data are and the operation switching and fan speed switching data show the type of data.

Remote control setting

Contents of output data
Operation switching Fan speed switching
MED Displays the reason for stopping display in the past (error code).
Cooling HI Displays the room temperature sensor temperature at the time the error code was displayed in the past.
AUTO Displays the indoor heat exchanger temperature sensor temperature at the time the error code was displayed in the past.
LO Displays the remote control information at the time the error code was displayed in the past.
MED Displays the outdoor air temperature sensor temperature at the time the error code was displayed in the past.
Heating
HI Displays the outdoor heat exchanger temperature sensor temperature at the time the error code was displayed in the past.
AUTO Displays the discharge pipe temperature sensor temperature at the time the error code was displayed in the past.

Remote control setting Indicates the number of

occasions previous to the present
Temperature setting the error display data are from.
21ºC 1 time previous (previous time)
22ºC 2 times previous
23ºC 3 times previous
24ºC 4 times previous
25ºC 5 times previous

(Example)

Remote control setting

Operation Fan speed Temperature Displayed data
switching switching setting
21ºC Displays the reason for the stop (error code) the previous time an error was displayed.
22ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed.
Cooling MED 23ºC Displays the reason for the stop (error code) 3 times previous when an error was displayed.
24ºC Displays the reason for the stop (error code) 4 times previous when an error was displayed.
25ºC Displays the reason for the stop (error code) 5 times previous when an error was displayed.

- 57 -
 '20 • SRK-T-320

② Stop data
Remote control setting
Operation Fan speed Temperature Displayed data
switching switching setting
21ºC Displays the reason for the stop (stop code) the previous time when the air-conditioner was stopped by protective stop control.
22ºC Displays the reason for the stop (stop code) 2 times previous when the air-conditioner was stopped by protective stop control.
23ºC Displays the reason for the stop (stop code) 3 times previous when the air-conditioner was stopped by protective stop control.
24ºC Displays the reason for the stop (stop code) 4 times previous when the air-conditioner was stopped by protective stop control.
25ºC Displays the reason for the stop (stop code) 5 times previous when the air-conditioner was stopped by protective stop control.
Cooling LO
26ºC Displays the reason for the stop (stop code) 6 times previous when the air-conditioner was stopped by protective stop control.
27ºC Displays the reason for the stop (stop code) 7 times previous when the air-conditioner was stopped by protective stop control.
28ºC Displays the reason for the stop (stop code) 8 times previous when the air-conditioner was stopped by protective stop control.
29ºC Displays the reason for the stop (stop code) 9 times previous when the air-conditioner was stopped by protective stop control.
30ºC Displays the reason for the stop (stop code) 10 times previous when the air-conditioner was stopped by protective stop control.

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 '09•SRK-DB-087D
'20 • SRK-T-320

(c) Error code, stop code table

Number of flashes when in
service mode Stop coad
Error Auto
RUN TIMER or Error content Cause Occurrence conditions display recovery
light light Error coad
(10's digit) (1's digit)
OFF 0 Normal

OFF Can not receive signals for 35 Power source is faulty. When 35 seconds passes without
5̺time Power source cables and signal lines
05 seconds communications signals from either the outdoor unit or
flash are improperly wired.
(if communications have recovered) the indoor unit being detected correctly.
Indoor or outdoor unit PCB are faulty.

Cooling overload operation.

5̺time Outdoor unit fan speed drops. When the outdoor heat exchanger temperature sensor's
35 Cooling high pressure control
flash Outdoor heat exchanger temperature value exceeds the set value. (5 times)
sensor is short-circuit.

6̺time Refrigerant is insufficient. When the discharge pipe temperature sensor's value
36 Compressor overheat 110°C Discharge pipe temperature sensor. is faulty. exceeds the set value.
flash (2 times)
Service valve is closed.

–55°C or lower is detected for 5 seconds continuously 3 times

Outdoor heat exchanger temperature
within 40 minutes after initial detection of this anomalous
7̺time Outdoor heat exchanger temperature sensor wire is disconnected.
37 temperature.
3̺time flash sensor is abnormal Connector connections are poor. (3 times)
Outdoor unit PCB is faulty. Or–55°C higher is detected for 5 seconds continuously
flash
within 20 seconds after power ON.

–55°C or lower is detected for 5 seconds continuously 3 times

Outdoor air temperature sensor wire is
Outdoor air sensor within 40 minutes after initial detection of this anomalous
8̺time disconnected.
38 temperature.
flash is abnormal Connector connections are poor. (3 times)
Outdoor PCB is faulty. Or–55°C higher is detected for 5 seconds continuously
within 20 seconds after power ON.
Discharge pipe temperature sensor wire –25°C or lower is detected for 5 seconds continuously 3 times
9̺time Discharge pipe temperature is disconnected.
39 within 40 minutes after initial detection of this anomalous
flash sensor is abnormal (anomalous stop) Connector connections are poor. (3 times)
temperature.
Outdoor unit PCB is faulty.
Compressor lock.
Compressor wiring short-circuit.
Compressor output is open phase. Compressor start fails 42 times in succession and the
2̺time
42 Current cut Outdoor unit PCB is faulty.
flash reason for the final failure is current cut. (2 times)
Service valve is closed.
Electronic expansion valve is faulty.
4̺time Compressor is faulty.
flash
7̺time When the wrong voltage connected for the power source.
47 Active filter voltage error Defective active filter.
flash When the outdoor unit PCB is faulty.

8̺time Outdoor unit's fan motor is Outdoor fan motor is faulty. When a fan speed of 75 min-1 or lower continues for 30
48 Connector connections are poor.
flash abnormal seconds or longer. (3 times)
Outdoor unit PCB is faulty.
Short-circuit in the power
1̺time Outdoor unit PCB is faulty. When it is judged that the power transistor was
51 transistor (high side)
flash Power transistor is damaged. damaged at the time the compressor started.
Current cut circuit breakdown

7̺time Refrigeration cycle system Service valve is closed. When refrigeration cycle system protective control
57
flash protective control Refrigerant is insufficient. operates. (3 times)

5̺time 8̺time Refrigerant is overcharge.

flash 58 Current safe Compressor lock. When there is a current safe stop during operation.
flash
Overload operation.

Compressor wiring is disconnected. When the current is 1A or less at the time the
Compressor wiring is unconnection Power transistor is damaged. compressor started.
9̺time
59 Voltage drop Power source construction is defective. When the power source voltage drops during operation.
flash
Low speed protective control Outdoor unit PCB is faulty. When the compressor command speed is lower than 32
Compressor is faulty. rps for 60 minutes.

Compressor is faulty.
Compressor output is open phase. After the compressor starts, when the compressor stops
OFF 60 Rotor lock Electronic expansion valve is faulty. due to rotor lock. (2 times)
Overload operation.
Outdoor unit PCB is faulty.
6̺time
Connection lines between the When 10 seconds passes after the power is turned on
flash 1̺time Connection lines are faulty.
61 indoor and outdoor units are without communications signals from the indoor or
flash Indoor or outdoor unit PCB are faulty.
faulty outdoor unit being detected correctly.

Indoor or outdoor unit PCB are faulty. When 7 minutes 35 seconds passes without
2̺time
62 Serial transmission error communications signals from either the outdoor unit or
flash Noise is causing faulty operation.
the indoor unit being detected correctly.

Indoor unit's fan motor is Indoor fan motor is faulty. When the indoor unit's fan motor is detected to be running
OFF 80 Connector connections are poor. at 300 min-1 or lower speed with the fan motor in the ON
abnormal
Indoor unit PCB is faulty. condition while the air-conditioner is running.

Indoor heat exchanger Indoor heat exchanger temperature When a temperature of –28°C or lower is sensed
2̺time
82 temperature sensor sensor wire is disconnected. continuously for 40 minutes during heating operation.
flash
is abnormal (anomalous stop) Connector connections are poor. (The compressor stops.)
8̺time
4̺time High humidity condition.
flash 84 Anti-condensation control Anti-condensation prevention control is operating.
flash Humidity sensor is faulty.

5̺time Indoor unit fan speed drops. When the anti-frost control operates and the compressor
85 Anti-frost control Indoor heat exchanger temperature
flash stops during cooling operation.
sensor is broken wire.
Heating overload operation.
6̺time Indoor unit fan speed drops. When high pressure control operates during heating
86 Heating high pressure control
flash Indoor heat exchanger temperature operation and the compressor stops.
sensor is short-circuit.

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 '20 • SRK-T-320

Notes (1) The number of flashes when in the service mode do not include the 1.5 second period when the lights light up at first (start signal). (See the ex-
ample shown below.)

• In the case of current cut (example: stop code “42”)

The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
4 × 10 + 2 × 1 = 42 → From the table, read the instructions for error code 42, “Current cut”.

1.5 sec.
ON
RUN light
(10’s digit)
OFF
0.5 sec. 0.5 sec.
ON
TIMER light
(1’s digit)
OFF
11-second interval

Notes (2) Abnormal Stop: - Is not displayed. (automatic recovery only)

○Displayed.
If there is a ( ) displayed, the error display shows the number of times that an automatic recovery occurred for the same
reason has reached the number of times in ( ).
If no ( ) is displayed, the error display shows that the trouble has occurred once.
Notes (3) Automatic Recovery: - Does not occur.
○Automatic recovery occurs.

(d) Wireless remote control information tables

1) Operation switching 2) Fan speed switching

Display pattern when Display pattern when

in service mode Fan speed
in service mode Operation switching switching when
when there is an there is an
RUN light abnormal stop TIMER light abnormal stop
(Operation switching) (Fan speed switching)
0 AUTO 0 AUTO
1 DRY 2 HI
2 COOL 3 MED
3 FAN 4 LO
4 HEAT 6 HI POWER
7 ECONO

* If no data are recorded (error code is normal), the information display in the wireless remote control becomes as follows.

Wireless remote control setting Display when error code is normal

Operation switching AUTO
Fan speed switching AUTO

(Example): Operation switching, fan speed switching, cooling HI

1.5 sec.
ON
RUN light
(10’s digit)
OFF
0.5 sec. 0.5 sec.
ON
TIMER light
(1’s digit)
OFF
11-second interval

- 60 -
 '20 • SRK-T-320

(e) Room temperature sensor, indoor heat exchanger temperature sensor, outdoor air temperature sen-
sor, outdoor heat exchanger temperature sensor table
Unit: ºC
TIMER light
(1’s digit)
RUN light
(10’s digit) 0 1 2 3 4 5 6 7 8 9

Buzzer sound
6 -60 -61 -62 -63 -64
5 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59
4 -40 -41 -42 -43 -44 -45 -46 -47 -48 -49
Yes
(sounds for 0.1 second) 3 -30 -31 -32 -33 -34 -35 -36 -37 -38 -39
2 -20 -21 -22 -23 -24 -25 -26 -27 -28 -29
1 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19
0 -1 -2 -3 -4 -5 -6 -7 -8 -9
0 0 1 2 3 4 5 6 7 8 9
1 10 11 12 13 14 15 16 17 18 19
2 20 21 22 23 24 25 26 27 28 29
3 30 31 32 33 34 35 36 37 38 39
No 4 40 41 42 43 44 45 46 47 48 49
(does not sound) 5 50 51 52 53 54 55 56 57 58 59
6 60 61 62 63 64 65 66 67 68 69
7 70 71 72 73 74 75 76 77 78 79
8 80 81 82 83 84 85 86 87 88 89
9 90 91 92 93 94 95 96 97 98 99

* If no data are recorded (error code is normal), the display for each sensor becomes as shown below.

Sensor name Sensor value displayed when the error code is normal
Room temperature sensor -19ºC
Indoor heat exchanger temperature sensor -64ºC
Outdoor air temperature sensor -64ºC
Outdoor heat exchanger temperature sensor -64ºC

(Example) Room temperature, indoor heat exchanger temperature, outdoor air temperature, outdoor heat exchanger tem-
perature: “-9ºC”

0.1 sec.
ON If the temperature is < 0, the buzzer sounds.
Buzzer sound If the temperature is >
= 0, the buzzer does not sound.
OFF

1.5 sec.
ON
RUN light
(10’s digit)
OFF
0.5 sec. 0.5 sec.
ON
TIMER light
(1’s digit)
OFF
11-second interval

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 '20 • SRK-T-320

(f) Discharge pipe temperature senson table

Unit: ºC
TIMER light
(1’s digit)
RUN light
(10’s digit) 0 1 2 3 4 5 6 7 8 9

Buzzer sound
3 -60 -62 -64
Yes 2 -40 -42 -44 -46 -48 -50 -52 -54 -56 -58
(sounds for 0.1 second) 1 -20 -22 -24 -26 -28 -30 -32 -34 -36 -38
0 -2 -4 -6 -8 -10 -12 -14 -16 -18
0 0 2 4 6 8 10 12 14 16 18
1 20 22 24 26 28 30 32 34 36 38
2 40 42 44 46 48 50 52 54 56 58
No 3 60 62 64 66 68 70 72 74 76 78
(does not sound)
4 80 82 84 86 88 90 92 94 96 98
5 100 102 104 106 108 110 112 114 116 118
6 120 122 124 126 128 130 132 134 136 138
7 140 142 144 146 148 150

* If no data are recorded (error code is normal), the display for sensor becomes as shown below.

Sensor name Sensor value displayed when the error code is normal
Discharge pipe temperature sensor -64ºC

(Example) Discharge pipe temperature: “122ºC”

* In the case of discharge pipe data, multiply the reading value by 2. (Below, 61 × 2 = “122ºC”)

0.1 sec.
ON If the temperature is < 0, the buzzer sounds.
Buzzer sound If the temperature is >
= 0, the buzzer does not sound.
OFF

1.5 sec.
ON
RUN light
(10’s digit)
OFF
0.5 sec. 0.5 sec.
ON
TIMER light
(1’s digit)
OFF
11-second interval

- 62 -
 '20 • SRK-T-320

Service data record form

Customer Model
Date of investigation
Machine name

Content of complaint

Remote control settings Display results

Content of displayed data Display content
Temperature setting Operation switching Fan speed switching Buzzer (Yes/No.) RUN light (Times) TIMER light (Times)
MED Error code on previous occasion
Cooling HI Room temperature sensor temperature on previous occasion
AUTO Indoor heat exchanger temperature sensor temperature on previous occasion
21 LO Remote control information on previous occasion
MED Outdoor air temperature sensor temperature on previous occasion
Heating
HI Outdoor heat exchanger temperature sensor temperature on previous occasion
AUTO Discharge pipe temperature sensor temperature on previous occasion
MED Error code on second previous occasion
Cooling HI Room temperature sensor temperature on second previous occasion
AUTO Indoor heat exchanger temperature sensor temperature on second previous occasion
22 LO Remote control information on second previous occasion
MED Outdoor air temperature sensor temperature on second previous occasion
Heating
HI Outdoor heat exchanger temperature sensor temperature on second previous occasion
AUTO Discharge pipe temperature sensor temperature on second previous occasion
MED Error code on third previous occasion
Cooling HI Room temperature sensor temperature on third previous occasion
AUTO Indoor heat exchanger temperature sensor temperature on third previous occasion
23 LO Remote control information on third previous occasion
MED Outdoor air temperature sensor temperature on third previous occasion
Heating
HI Outdoor heat exchanger temperature sensor temperature on third previous occasion
AUTO Discharge pipe temperature sensor temperature on third previous occasion
MED Error code on fourth previous occasion
Cooling HI Room temperature sensor temperature on fourth previous occasion
AUTO Indoor heat exchanger temperature sensor temperature on fourth previous occasion
24 LO Remote control information on fourth previous occasion
MED Outdoor air temperature sensor temperature on fourth previous occasion
Heating
HI Outdoor heat exchanger temperature sensor temperature on fourth previous occasion
AUTO Discharge pipe temperature sensor temperature on fourth previous occasion
MED Error code on fifth previous occasion
Cooling HI Room temperature sensor temperature on fifth previous occasion
AUTO Indoor heat exchanger temperature sensor temperature on fifth previous occasion
25 LO Remote control information on fifth previous occasion
MED Outdoor air temperature sensor temperature on fifth previous occasion
Heating
HI Outdoor heat exchanger temperature sensor temperature on fifth previous occasion
AUTO Discharge pipe temperature sensor temperature on fifth previous occasion
21 Stop code on previous occasion
22 Stop code on second previous occasion
23 Stop code on third previous occasion
24 Stop code on fourth previous occasion
25 Stop code on fifth previous occasion
Cooling LO
26 Stop code on sixth previous occasion
27 Stop code on seventh previous occasion
28 Stop code on eighth previous occasion
29 Stop code on ninth previous occasion
30 Stop code on tenth previous occasion
Examiner

Judgment

Remarks

- 63 -
 '20 • SRK-T-320

(7) Inspection procedures corresponding to detail of trouble

Sensor error Broken sensor wire,

connector poor connection

Discharge pipe temperature sensor characteristics Sensor temperature characteristics (Room

temperature, indoor heat exchanger
temperature, outdoor heat exchanger
temperature, outdoor air temperature)

180 30
160
25
140
Resistance (k )

Resistance (k )
120 20
100
15
80
60 10
40
5
20
- 0 -
-10 0 10 20 30 40 50 60 70
0 20 40 60 80 100 120 135
Temperature (˚C) Temperature (˚C)

Indoor fan motor error Defective fan motor, connector poor

connection, defective indoor unit PCB

unit

unit

69 for the fan motor and indoor unit PCB check

pro
unit
unit

Power source reset

Replace fan motor. (If the

error persists after replacing
Is it normalized?
the fan motor, replace the
indoor unit PCB.)

Malfunction by temporary noise

- 64 -
 '09•SRK-DB-087D
'20 • SRK-T-320

Current cut Compressor lock, Compressor wiring short-circuit, Compressor output is open phase,
Outdoor unit PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty.

73.
unit

unit

unit
70.

Check resistance between terminals .

SRC25, 35 : 4.428Ω (U-V, V-W, U-W) or more at 20ºC
SRC45, 50 : 1.728Ω (U-V) , 1.705Ω (V-W) , 1.761Ω (U-W) or more at 20ºC

Current safe stop Overload operation, compressor

lock, overcharge

Inspect outdoor air temperature sensor

unit

- 65 -
 '09•SRK-DB-087D
'20 • SRK-T-320

Over heat of compressor Gas shortage, defective discharge

pipe temperature sensor

Is discharge pipe temperature. sensor

64) temperature sensor

unit

Error of signal transmission Wiring error including power cable, defective indoor/
outdoor unit PCB

-
- unit

-
-

unit
-

unit

- 66 -
 '09•SRK-DB-087D
'20 • SRK-T-320

Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire
Service valve close, Defective EEV, Defective outdoor unit PCB

source source source

source
AC AC -
AC AC -
AC AC -

(1)

unit

(2)

unit

operation

(3)
Notes (1) 73.

unit (2) 70.

(3) Check resistance between terminals, see page 65.

Outdoor fan motor error Defective fan motor, connector poor

connection, defective outdoor unit PCB

the fan motor and outdoor

unit Replace outdoor fan motor

ourdoor unit PCB

See page 71-73 for the fan motor and outdoor unit PCB
outdoor unit check pro
After making sure the fan motor and outdoor unit PCB are
nor

Power source reset

Replace fan motor. (If the

error persists after replacing
Is it normalized?
the fan motor, replace the
outdoor unit PCB.)

Malfunction by temporary noise

- 67 -
 '20 • SRK-T-320

Rotor lock Defective compressor, defective

outdoor unit PCB

unit

Check resistance between terminals.

See page 65.

(8) Phenomenon observed after short-circuit, wire breakage on sensor

(a) Indoor unit
Operation Phenomenon
Sensor
mode Short-circuit Disconnected wire
Room temperature Cooling
sensor Heating

Heat exchanger Cooling

temperature sensor
Heating
Cooling
Humidity sensor
Heating

Humidity sensor operation

Failure mode Control input circuit reading Air conditioning system operation

short-
-

.
.

(b) Outdoor unit

Operation Phenomenon
Sensor
mode Shortcircuit Disconnected wire
Heat exchanger Cooling .
temperature sensor Heating operation Defrost operation is performed for 10 minutes at approx. 35 (model LMC12:45) minutes.
Ourdoor air Cooling .
temperature sensor Heating operation Defrost operation is performed for 10 minutes at approx. 35 (model LMC12:45) minutes.
Discharge pipe
All modes .
temperature sensor

(9) Checking the indoor electrical equipment

(a) Indoor unit PCB check procedure

Is there voltage between terminal NO Inspect power source

blocks and ? (AC 220/230/240 for outdoor unit.
V)
YES

NO
Is the fuse burnt out? (3.15 A) Replace fuse.

YES

Is the voltage between terminal NO Replace indoor unit

blocks and oscillating between PCB.
DC 0 and 20V?

YES

Indoor electrical components

- 68 -
are normal.

(b) Indoor unit fan motor check procedure

unit
1) Indoor unit PCB output check
 (b) Outdoor unit
Operation Phenomenon
Sensor
mode Shortcircuit Disconnected wire
Heat exchanger Cooling .
temperature sensor Heating operation Defrost operation is performed for 10 minutes at approx. 35 (model LMC12:45) minutes.
Ourdoor air Cooling .
temperature sensor Heating operation
'20 • SRK-T-320
Defrost operation is performed for 10 minutes at approx. 35 (model LMC12:45) minutes.
Discharge pipe
All modes .
temperature sensor

(9) Checking the indoor electrical equipment

(a) Indoor unit PCB check procedure

Is there voltage between terminal NO Inspect power source

blocks and ? (AC 220/230/240 for outdoor unit.
V)
YES

NO
Is the fuse burnt out? (3.15 A) Replace fuse.

YES

Is the voltage between terminal NO Replace indoor unit

blocks and oscillating between PCB.
DC 0 and 20V?

YES

Indoor electrical components

are normal.

(b) Indoor unit fan motor check procedure

unit
1) Indoor unit PCB output check

unit

unit

DC several V (–)
(4-6 V) GND DC 308-336V
Measuring Voltage range when
DC15V point normal
-
CNU Indoor unit PCB
-
Yellow

White

Black
Blue

Red

FMi

2) Fan motor resistance check

Measuring point Resistance when normal

- 69 -
 '20 • SRK-T-320

(c) Power transistor inspection procedure

[Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)]
(1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are
found, check the output of the power transistor.
(2) Output inspection procedure
Disconnect the terminals for the compresseor.
If an output such as the one shown in the figure on the below can be measured, the power transistor and the circuit
board for the outdoor unit are normal.

(Example)
RUN light : ON
TIMER light: 2 time flash
Output voltage
(ACV)

0
8-10 sec. 1 sec. 3 min. 1 sec. 3 min. 1 sec.

Operation switch ON Measure in this section

(10)(10)
How to make
How sure
to make of wireless
sure remote
of wireless control
remote controller
(1)
Is wireless NO Wireless remote
remote control control defects
normal?

YES Replace the display.

Again pushing
operating switch

Is the unit
YES
operable with Normal
wireless remote
YES Abnormality is not control?
Operating the unit?
found. NO

Defective wireless
NO remote control

Does unit ON/OFF

button operate?
Note (1) Check method of wireless remote control
(a) Press the reset switch of the wireless remote control.
(b) If all LCD are displayed after one (1) display, it is basically normal.
The figare below shows the SRK series.

YES
Operating the unit.

NO

Control problem on
main unit

- 70 -
 ◆ Check point of outdoor unit

CAUTION- HIGH VOLTAGE

High voltage is produced in the control box. Don't touch
electrical parts in the control box for 5 minutes after the
unit is stopped.
◆Inspection power transistor
Remove the fasten terminal and test output voltage.
Power source
1 Phase
220-240V 50Hz （YELLOW）
（ORANGE） REACTOR

3 PCB ASSY
T1 T2 POWER
F7 t° TRANSISTOR
TERMINAL F2 U （RED）
T 250V E 15A （BLACK） R.IN U
BLOCK P
(11) Outdoor unit inspection points

TB1 + + 250V 20A

Models SRC25ZSP-W, 35ZSP-W

NOISE NU V V （WHITE） M
L 1 （WHITE） S.IN FILTER NV 3～
NW W W （BLACK） COMPRESSOR
N 2 MOTOR
（RED） C-2 F3 T 1A L 250V
3 （YELLOW／ PAM

F1
GREEN） G1 F4 CIRCUIT CNFAN M
（YELLOW／ 250V 2A

-
（YELLOW／ 250V 10A FAN MOTOR
GREEN） GREEN） G2 SWITCHING POWER
4 CIRCUIT
CN20S CNTH CNEEV

71 -
2 2 2 2

◆Inspection of outdoor fan motor

M See page 73.

◆Power source and serial signal inspection

1 to 2 : AC 220/230/240V

SOLENOID COIL FOR

4 -WAY VALVE
HEAT EXCHANGER
TEMPERATURE SENSOR
OUTDOOR AIR
TEMPERATURE SENSOR t°
DISCHARGE PIPE
TEMPERATURE SENSOR t°
ELECTRIC EXPANSION
VALVE（COIL）

2 to 3 : Normal if the voltage oscillates between DC 0 and approx. 20V ◆Inspection of electronic expansion valve
（OUTDOOR UNIT ） t°

See page 73.

◆Inspection of resistance value of sensor

Remove the connector and check the resistance value.
See the section of sensor characteristics on page 64.
'20 • SRK-T-320
 ◆ Check point of outdoor unit

CAUTION- HIGH VOLTAGE

High voltage is produced in the control box. Don't touch
electrical parts in the control box for 5 minutes after the
unit is stopped.
◆Inspection power transistor
Remove the fasten terminal and test output voltage.

Power source
1 Phase
220-240V 50Hz
220V 60Hz
PCB ASSY PCB1
3
DIODE POWER
STACK1 T1 （YE） （YE） T2
F4 L1 TRANSISTOR
（BK） R.IN ～ ＋
250V 20A NOISE T11 （BL） （BL） T12 U （RD）
FILTER L2 P U
（WH） S.IN
+ + + V （WH） MS
～ － V
Models SRC45ZSP-W, 50ZSP-W

（RD） C-2 3～
F8 W （BK）
W
N
250V 20A CM

DIODE PAM PAM

STACK2 CIRCUIT CIRCUIT
F1 F3
TERMINAL （YG） G1 ～ ＋
BLOCK SWITCHING T 1A L 250V
TB1 F 3.15A L 250V POWER
（BK） CIRCUIT
L 1 （YG） G2

-
～ － CNFAN M
（WH）
N 2
FMo
3

72 -
（YG） （RD）
CN20S CNTH（BK） CNEEV（WH）
4

2 2 2 2

t゜
t゜
t゜

20S
TH1 TH2 TH3 EEV

◆Inspection of outdoor fan motor

See page 73.

◆Power source and serial signal inspection

1 to 2 : AC 220/230/240V ◆Inspection of resistance value of sensor ◆Inspection of electronic expansion valve
2 to 3 : Normal if the voltage oscillates between DC 0 and approx. 20V Remove the connector and check the resistance value.
See page 73.
See the section of sensor characteristics on page 64.
'20 • SRK-T-320
 '20 • SRK-T-320

(a) Inspection of electronic expansion valve

Electronic expansion valve operates for approx. 10 seconds after the power on, in order to determine its aperture. Check
the operating sound and voltage during the period of time. (Voltage cannot be checked during operation in which only
the aperture change occurs.)
(i) If it is heard the sound of operating electronic expansion valve, it is almost normal.
(ii) If the operating sound is not heard, check the output voltage.

1 -3
6 5 4 3 2 1
Expansion valve connector 1 -4
(6P, black)
Approx. DC5 V is detected for 10 seconds after the power on.
White

Yellow

Orange

Blue

Red
1 -5
1 -6

(iii) If voltage is detected, the outdoor unit PCB is normal.

(iv) If the expansion valve does not operate (no operating sound) while voltage is detected, the expansion valve is
defective.
• Inspection of electronic expansion valve as a separate unit
Measure the resistance between terminals with an analog tester.

Measuring point Resistance when normal

1–6
1–4 46 ± 4Ω
1–3 (at 20ºC)
1–5

(b) Outdoor unit fan motor check procedure

• When the outdoor unit fan motor error is detected, diagnose which of the outdoor unit fan motor or outdoor unit PCB
is defective.
• Diagnose this only after confirming that the indoor unit is normal.
(i) Outdoor unit PCB output check
1) Turn off the power.
2) Disconnect the outdoor unit fan motor connector CNFAN.
3) When the indoor unit is operated by inserting the power source plug and pressing (ON) the backup switch for more
than 5 seconds, if the voltage of pin No. ② in the following figure is output for 30 seconds at 20 seconds after
turning “ON” the backup switch, the outdoor unit PCB is normal but the fan motor is defective.
If the voltage is not detected, the outdoor unit PCB is defective but the fan motor is normal.
Note (1) The voltage is output 3 times repeatedly. If it is not detected, the indoor unit displays the error message.

FM0
Measuring Voltage range when
point normal
⑥－④ DC 308-336V
③－④ DC 15V
White

Yellow

Blue
Red

Black

②－④ DC several V (4-7V)

CNFAN Outdoor unit PCB

DC several (4-7V)
DC308-336V GND
DC15V

(ii) Fan motor resistance check

Measuring point Resistance when normal Notes (1) Remove the fan motor and measure it without power connected to it.
⑥ － ④ (Red － Black) 20 MΩ or higher Notes (2) If the measured value is below the value when the motor is normal, it means
③ － ④ (White － Black) 20 kΩ or higher that the fan motor is faulty.

- 73 -
 '20 • SRK-T-320

11. TECHNICAL INFORMATION

Model SRK25ZSP-W
Information to identify the model(s) to which the information relates to: If function includes heating: Indicate the heating season the
Indoor unit model name SRK25ZSP-W information relates to. Indicated values should relate to one
Outdoor unit model name SRC25ZSP-W heating season at a time. Include at least the heating season 'Average'.

Function(indicate if present) Average(mandatory) Yes

cooling Yes Warmer(if designated) Yes
heating Yes Colder(if designated) No

Item symbol value unit Item symbol value class

Design load Seasonal efficiency and energy efficiency class
cooling Pdesignc 2.50 kW cooling SEER 6.80 A++
heating / Average Pdesignh 2.80 kW heating / Average SCOP/A 4.10 A+
heating / Warmer Pdesignh 3.30 kW heating / Warmer SCOP/W 5.40 A+++
heating / Colder Pdesignh - kW heating / Colder SCOP/C - -
unit
Declared capacity at outdoor temperature Tdesignh Back up heating capacity at outdoor temperature Tdesignh
heating / Average (-10℃) Pdh 2.46 kW heating / Average (-10℃) elbu 0.34 kW
heating / Warmer (2℃) Pdh 3.30 kW heating / Warmer (2℃) elbu 0 kW
heating / Colder (-22℃) Pdh - kW heating / Colder (-22℃) elbu - kW

Declared capacity for cooling, at indoor temperature 27(19)℃ and Declared energy efficiency ratio, at indoor temperature 27(19)℃ and
outdoor temperature Tj outdoor temperature Tj
Tj=35℃ Pdc 2.50 kW Tj=35℃ EERd 3.52 -
Tj=30℃ Pdc 1.85 kW Tj=30℃ EERd 5.70 -
Tj=25℃ Pdc 1.25 kW Tj=25℃ EERd 9.36 -
Tj=20℃ Pdc 1.10 kW Tj=20℃ EERd 12.90 -

Declared capacity for heating / Average season, at indoor Declared coefficient of performance / Average season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh 2.50 kW Tj=-7℃ COPd 2.44 -
Tj=2℃ Pdh 1.44 kW Tj=2℃ COPd 3.98 -
Tj=7℃ Pdh 1.00 kW Tj=7℃ COPd 5.74 -
Tj=12℃ Pdh 1.10 kW Tj=12℃ COPd 7.30 -
Tj=bivalent temperature Pdh 2.50 kW Tj=bivalent temperature COPd 2.44 -
Tj=operating limit Pdh 2.40 kW Tj=operating limit COPd 2.06 -

Declared capacity for heating / Warmer season, at indoor Declared coefficient of performance / Warmer season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=2℃ Pdh 3.30 kW Tj=2℃ COPd 2.34 -
Tj=7℃ Pdh 2.10 kW Tj=7℃ COPd 4.80 -
Tj=12℃ Pdh 1.10 kW Tj=12℃ COPd 7.30 -
Tj=bivalent temperature Pdh 3.30 kW Tj=bivalent temperature COPd 2.34 -
Tj=operating limit Pdh 2.40 kW Tj=operating limit COPd 2.06 -

Declared capacity for heating / Colder season, at indoor Declared coefficient of performance / Colder season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh - kW Tj=-7℃ COPd - -
Tj=2℃ Pdh - kW Tj=2℃ COPd - -
Tj=7℃ Pdh - kW Tj=7℃ COPd - -
Tj=12℃ Pdh - kW Tj=12℃ COPd - -
Tj=bivalent temperature Pdh - kW Tj=bivalent temperature COPd - -
Tj=operating limit Pdh - kW Tj=operating limit COPd - -
Tj=-15℃ Pdh - kW Tj=-15℃ COPd - -

Bivalent temperature Operating limit temperature

heating / Average Tbiv -7 ℃ heating / Average Tol -15 ℃
heating / Warmer Tbiv 2 ℃ heating / Warmer Tol -15 ℃
heating / Colder Tbiv - ℃ heating / Colder Tol - ℃

Cycling interval capacity Cycling interval efficiency

for cooling Pcycc - kW for cooling EERcyc - -
for heating Pcych - kW for heating COPcyc - -

Degradation coefficient Degradation coefficient

cooling Cdc 0.25 - heating Cdh 0.25 -

Electric power input in power modes other than 'active mode' Annual electricity consumption
off mode Poff 6 W cooling Qce 129 kWh/a
standby mode Psb 6 W heating / Average Qhe 957 kWh/a
thermostat-off mode Pto(cooling) 11 W heating / Warmer Qhe 855 kWh/a
Pto(heating) 15 W heating / colder Qhe - kWh/a
crankcase heater mode Pck 0 W

Capacity control(indicate one of three options) Other items

Sound power level(indoor) Lwa 57 dB(A)
Sound power level(outdoor) Lwa 57 dB(A)
fixed No Global warming potential GWP 675 kgCO2eq.
staged No Rated air flow(indoor) - 600 m3/h
variable Yes Rated air flow(outdoor) - 1422 m3/h

Contact details for obtaining Name and address of the manufacturer or of its authorised representative.
more information MHIAE SERVICES B.V.
Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands

C RWA000Z275 C
- 74 -
 '20 • SRK-T-320

Model SRK35ZSP-W
Information to identify the model(s) to which the information relates to: If function includes heating: Indicate the heating season the
Indoor unit model name SRK35ZSP-W information relates to. Indicated values should relate to one
Outdoor unit model name SRC35ZSP-W heating season at a time. Include at least the heating season 'Average'.

Function(indicate if present) Average(mandatory) Yes

cooling Yes Warmer(if designated) Yes
heating Yes Colder(if designated) No

Item symbol value unit Item symbol value class

Design load Seasonal efficiency and energy efficiency class
cooling Pdesignc 3.20 kW cooling SEER 7.30 A++
heating / Average Pdesignh 3.00 kW heating / Average SCOP/A 4.40 A+
heating / Warmer Pdesignh 3.60 kW heating / Warmer SCOP/W 5.70 A+++
heating / Colder Pdesignh - kW heating / Colder SCOP/C - -
unit
Declared capacity at outdoor temperature Tdesignh Back up heating capacity at outdoor temperature Tdesignh
heating / Average (-10℃) Pdh 2.63 kW heating / Average (-10℃) elbu 0.37 kW
heating / Warmer (2℃) Pdh 3.60 kW heating / Warmer (2℃) elbu 0 kW
heating / Colder (-22℃) Pdh - kW heating / Colder (-22℃) elbu - kW

Declared capacity for cooling, at indoor temperature 27(19)℃ and Declared energy efficiency ratio, at indoor temperature 27(19)℃ and
outdoor temperature Tj outdoor temperature Tj
Tj=35℃ Pdc 3.20 kW Tj=35℃ EERd 3.52 -
Tj=30℃ Pdc 2.36 kW Tj=30℃ EERd 5.50 -
Tj=25℃ Pdc 1.52 kW Tj=25℃ EERd 9.70 -
Tj=20℃ Pdc 1.14 kW Tj=20℃ EERd 16.06 -

Declared capacity for heating / Average season, at indoor Declared coefficient of performance / Average season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh 2.66 kW Tj=-7℃ COPd 2.64 -
Tj=2℃ Pdh 1.62 kW Tj=2℃ COPd 4.36 -
Tj=7℃ Pdh 1.04 kW Tj=7℃ COPd 5.95 -
Tj=12℃ Pdh 1.19 kW Tj=12℃ COPd 7.48 -
Tj=bivalent temperature Pdh 2.66 kW Tj=bivalent temperature COPd 2.64 -
Tj=operating limit Pdh 2.57 kW Tj=operating limit COPd 2.21 -

Declared capacity for heating / Warmer season, at indoor Declared coefficient of performance / Warmer season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=2℃ Pdh 3.60 kW Tj=2℃ COPd 2.55 -
Tj=7℃ Pdh 2.32 kW Tj=7℃ COPd 5.17 -
Tj=12℃ Pdh 1.19 kW Tj=12℃ COPd 7.48 -
Tj=bivalent temperature Pdh 3.60 kW Tj=bivalent temperature COPd 2.55 -
Tj=operating limit Pdh 2.57 kW Tj=operating limit COPd 2.21 -

Declared capacity for heating / Colder season, at indoor Declared coefficient of performance / Colder season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh - kW Tj=-7℃ COPd - -
Tj=2℃ Pdh - kW Tj=2℃ COPd - -
Tj=7℃ Pdh - kW Tj=7℃ COPd - -
Tj=12℃ Pdh - kW Tj=12℃ COPd - -
Tj=bivalent temperature Pdh - kW Tj=bivalent temperature COPd - -
Tj=operating limit Pdh - kW Tj=operating limit COPd - -
Tj=-15℃ Pdh - kW Tj=-15℃ COPd - -

Bivalent temperature Operating limit temperature

heating / Average Tbiv -7 ℃ heating / Average Tol -15 ℃
heating / Warmer Tbiv 2 ℃ heating / Warmer Tol -15 ℃
heating / Colder Tbiv - ℃ heating / Colder Tol - ℃

Cycling interval capacity Cycling interval efficiency

for cooling Pcycc - kW for cooling EERcyc - -
for heating Pcych - kW for heating COPcyc - -

Degradation coefficient Degradation coefficient

cooling Cdc 0.25 - heating Cdh 0.25 -

Electric power input in power modes other than 'active mode' Annual electricity consumption
off mode Poff 6 W cooling Qce 154 kWh/a
standby mode Psb 6 W heating / Average Qhe 955 kWh/a
thermostat-off mode Pto(cooling) 11 W heating / Warmer Qhe 884 kWh/a
Pto(heating) 15 W heating / colder Qhe - kWh/a
crankcase heater mode Pck 0 W

Capacity control(indicate one of three options) Other items

Sound power level(indoor) Lwa 58 dB(A)
Sound power level(outdoor) Lwa 59 dB(A)
fixed No Global warming potential GWP 675 kgCO2eq.
staged No Rated air flow(indoor) - 570 m3/h
variable Yes Rated air flow(outdoor) - 1368 m3/h

Contact details for obtaining Name and address of the manufacturer or of its authorised representative.
more information MHIAE SERVICES B.V.
Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands

C RWA000Z275 C
- 75 -
 '20 • SRK-T-320

Model SRK45ZSP-W
Information to identify the model(s) to which the information relates to: If function includes heating: Indicate the heating season the
Indoor unit model name SRK45ZSP-W information relates to. Indicated values should relate to one
Outdoor unit model name SRC45ZSP-W heating season at a time. Include at least the heating season 'Average'.

Function(indicate if present) Average(mandatory) Yes

cooling Yes Warmer(if designated) Yes
heating Yes Colder(if designated) No

Item symbol value unit Item symbol value class

Design load Seasonal efficiency and energy efficiency class
cooling Pdesignc 4.50 kW cooling SEER 6.30 A++
heating / Average Pdesignh 3.80 kW heating / Average SCOP/A 4.20 A+
heating / Warmer Pdesignh 4.30 kW heating / Warmer SCOP/W 5.50 A+++
heating / Colder Pdesignh - kW heating / Colder SCOP/C - -
unit
Declared capacity at outdoor temperature Tdesignh Back up heating capacity at outdoor temperature Tdesignh
heating / Average (-10℃) Pdh 3.26 kW heating / Average (-10℃) elbu 0.54 kW
heating / Warmer (2℃) Pdh 4.30 kW heating / Warmer (2℃) elbu 0 kW
heating / Colder (-22℃) Pdh - kW heating / Colder (-22℃) elbu - kW

Declared capacity for cooling, at indoor temperature 27(19)℃ and Declared energy efficiency ratio, at indoor temperature 27(19)℃ and
outdoor temperature Tj outdoor temperature Tj
Tj=35℃ Pdc 4.50 kW Tj=35℃ EERd 3.33 -
Tj=30℃ Pdc 3.32 kW Tj=30℃ EERd 5.05 -
Tj=25℃ Pdc 2.13 kW Tj=25℃ EERd 7.75 -
Tj=20℃ Pdc 1.80 kW Tj=20℃ EERd 12.09 -

Declared capacity for heating / Average season, at indoor Declared coefficient of performance / Average season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh 3.36 kW Tj=-7℃ COPd 2.61 -
Tj=2℃ Pdh 2.05 kW Tj=2℃ COPd 4.10 -
Tj=7℃ Pdh 1.44 kW Tj=7℃ COPd 5.70 -
Tj=12℃ Pdh 1.62 kW Tj=12℃ COPd 7.10 -
Tj=bivalent temperature Pdh 3.36 kW Tj=bivalent temperature COPd 2.61 -
Tj=operating limit Pdh 3.09 kW Tj=operating limit COPd 2.34 -

Declared capacity for heating / Warmer season, at indoor Declared coefficient of performance / Warmer season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=2℃ Pdh 4.30 kW Tj=2℃ COPd 2.76 -
Tj=7℃ Pdh 2.76 kW Tj=7℃ COPd 5.12 -
Tj=12℃ Pdh 1.62 kW Tj=12℃ COPd 7.10 -
Tj=bivalent temperature Pdh 4.30 kW Tj=bivalent temperature COPd 2.76 -
Tj=operating limit Pdh 3.09 kW Tj=operating limit COPd 2.34 -

Declared capacity for heating / Colder season, at indoor Declared coefficient of performance / Colder season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh - kW Tj=-7℃ COPd - -
Tj=2℃ Pdh - kW Tj=2℃ COPd - -
Tj=7℃ Pdh - kW Tj=7℃ COPd - -
Tj=12℃ Pdh - kW Tj=12℃ COPd - -
Tj=bivalent temperature Pdh - kW Tj=bivalent temperature COPd - -
Tj=operating limit Pdh - kW Tj=operating limit COPd - -
Tj=-15℃ Pdh - kW Tj=-15℃ COPd - -

Bivalent temperature Operating limit temperature

heating / Average Tbiv -7 ℃ heating / Average Tol -15 ℃
heating / Warmer Tbiv 2 ℃ heating / Warmer Tol -15 ℃
heating / Colder Tbiv - ℃ heating / Colder Tol - ℃

Cycling interval capacity Cycling interval efficiency

for cooling Pcycc - kW for cooling EERcyc - -
for heating Pcych - kW for heating COPcyc - -

Degradation coefficient Degradation coefficient

cooling Cdc 0.25 - heating Cdh 0.25 -

Electric power input in power modes other than 'active mode' Annual electricity consumption
off mode Poff 7 W cooling Qce 251 kWh/a
standby mode Psb 7 W heating / Average Qhe 1269 kWh/a
thermostat-off mode Pto(cooling) 18 W heating / Warmer Qhe 1095 kWh/a
Pto(heating) 20 W heating / colder Qhe - kWh/a
crankcase heater mode Pck 0 W

Capacity control(indicate one of three options) Other items

Sound power level(indoor) Lwa 56 dB(A)
Sound power level(outdoor) Lwa 63 dB(A)
fixed No Global warming potential GWP 675 kgCO2eq.
staged No Rated air flow(indoor) - 540 m3/h
variable Yes Rated air flow(outdoor) - 2136 m3/h

Contact details for obtaining Name and address of the manufacturer or of its authorised representative.
more information MHIAE SERVICES B.V.
Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands

C RWA000Z275 C
- 76 -
 '20 • SRK-T-320

Model SRK50ZSP-W
Information to identify the model(s) to which the information relates to: If function includes heating: Indicate the heating season the
Indoor unit model name SRK50ZSP-W information relates to. Indicated values should relate to one
Outdoor unit model name SRC50ZSP-W heating season at a time. Include at least the heating season 'Average'.

Function(indicate if present) Average(mandatory) Yes

cooling Yes Warmer(if designated) Yes
heating Yes Colder(if designated) No

Item symbol value unit Item symbol value class

Design load Seasonal efficiency and energy efficiency class
cooling Pdesignc 5.00 kW cooling SEER 6.20 A++
heating / Average Pdesignh 3.80 kW heating / Average SCOP/A 4.20 A+
heating / Warmer Pdesignh 4.30 kW heating / Warmer SCOP/W 5.50 A+++
heating / Colder Pdesignh - kW heating / Colder SCOP/C - -
unit
Declared capacity at outdoor temperature Tdesignh Back up heating capacity at outdoor temperature Tdesignh
heating / Average (-10℃) Pdh 3.26 kW heating / Average (-10℃) elbu 0.54 kW
heating / Warmer (2℃) Pdh 4.30 kW heating / Warmer (2℃) elbu 0 kW
heating / Colder (-22℃) Pdh - kW heating / Colder (-22℃) elbu - kW

Declared capacity for cooling, at indoor temperature 27(19)℃ and Declared energy efficiency ratio, at indoor temperature 27(19)℃ and
outdoor temperature Tj outdoor temperature Tj
Tj=35℃ Pdc 5.00 kW Tj=35℃ EERd 2.87 -
Tj=30℃ Pdc 3.69 kW Tj=30℃ EERd 4.86 -
Tj=25℃ Pdc 2.37 kW Tj=25℃ EERd 7.65 -
Tj=20℃ Pdc 1.80 kW Tj=20℃ EERd 12.59 -

Declared capacity for heating / Average season, at indoor Declared coefficient of performance / Average season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh 3.36 kW Tj=-7℃ COPd 2.61 -
Tj=2℃ Pdh 2.05 kW Tj=2℃ COPd 4.10 -
Tj=7℃ Pdh 1.44 kW Tj=7℃ COPd 5.70 -
Tj=12℃ Pdh 1.62 kW Tj=12℃ COPd 7.10 -
Tj=bivalent temperature Pdh 3.36 kW Tj=bivalent temperature COPd 2.61 -
Tj=operating limit Pdh 3.09 kW Tj=operating limit COPd 2.34 -

Declared capacity for heating / Warmer season, at indoor Declared coefficient of performance / Warmer season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=2℃ Pdh 4.30 kW Tj=2℃ COPd 2.76 -
Tj=7℃ Pdh 2.76 kW Tj=7℃ COPd 5.12 -
Tj=12℃ Pdh 1.62 kW Tj=12℃ COPd 7.10 -
Tj=bivalent temperature Pdh 4.30 kW Tj=bivalent temperature COPd 2.76 -
Tj=operating limit Pdh 3.09 kW Tj=operating limit COPd 2.34 -

Declared capacity for heating / Colder season, at indoor Declared coefficient of performance / Colder season, at indoor
temperature 20℃ and outdoor temperature Tj temperature 20℃ and outdoor temperature Tj
Tj=-7℃ Pdh - kW Tj=-7℃ COPd - -
Tj=2℃ Pdh - kW Tj=2℃ COPd - -
Tj=7℃ Pdh - kW Tj=7℃ COPd - -
Tj=12℃ Pdh - kW Tj=12℃ COPd - -
Tj=bivalent temperature Pdh - kW Tj=bivalent temperature COPd - -
Tj=operating limit Pdh - kW Tj=operating limit COPd - -
Tj=-15℃ Pdh - kW Tj=-15℃ COPd - -

Bivalent temperature Operating limit temperature

heating / Average Tbiv -7 ℃ heating / Average Tol -15 ℃
heating / Warmer Tbiv 2 ℃ heating / Warmer Tol -15 ℃
heating / Colder Tbiv - ℃ heating / Colder Tol - ℃

Cycling interval capacity Cycling interval efficiency

for cooling Pcycc - kW for cooling EERcyc - -
for heating Pcych - kW for heating COPcyc - -

Degradation coefficient Degradation coefficient

cooling Cdc 0.25 - heating Cdh 0.25 -

Electric power input in power modes other than 'active mode' Annual electricity consumption
off mode Poff 7 W cooling Qce 283 kWh/a
standby mode Psb 7 W heating / Average Qhe 1269 kWh/a
thermostat-off mode Pto(cooling) 18 W heating / Warmer Qhe 1095 kWh/a
Pto(heating) 20 W heating / colder Qhe - kWh/a
crankcase heater mode Pck 0 W

Capacity control(indicate one of three options) Other items

Sound power level(indoor) Lwa 59 dB(A)
Sound power level(outdoor) Lwa 65 dB(A)
fixed No Global warming potential GWP 675 kgCO2eq.
staged No Rated air flow(indoor) - 594 m3/h
variable Yes Rated air flow(outdoor) - 2262 m3/h

Contact details for obtaining Name and address of the manufacturer or of its authorised representative.
more information MHIAE SERVICES B.V.
Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands

C RWA000Z275 C
- 77 -
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS

MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo, 100-8332, Japan
MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
http://www.mhi-mth.co.jp/en/
16-5 Konan 2-chome, Minato-ku, Tokyo, 108-8215, Japan
http://www.mhi-mth.co.jp/en/

Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice.
C Copyright
Because of our policy of continuous improvement, MITSUBISHI
we reserve the rightHEAVY
to makeINDUSTRIES
changes in allTHERMAL SYSTEMS,
specifications LTD.
without notice.
C Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.