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SRK 2002

1. The document discusses Mitsubishi Heavy's line of air conditioners for the 2002 season, including wall-mounted split-system models. 2. Models include SRK208 through SRK561 units for both cooling and heating or cooling only. Some older 2001 models like SRK501 and SRK561 are being discontinued. 3. The units operate on refrigerant R22 but R407 is also an option. Additional information on R407 models and discontinued units can be obtained from Biufort by phone.

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0% found this document useful (0 votes)

227 views68 pages

SRK 2002

Uploaded by

JOSE

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Линейка кондиционеров Mitsubishi Heavy на

сезон 2002 года.

1. Настенные бытовые сплит-системы.

WALL MOUNTED TYPE ROOM AIR CONDITIONER
тепло/холод только охлаждение инвертор

SRK 208 HENF-L SRK 208 СENF-L

SRK 258 СENF-L
SRK 288 HENF-L SRK 288 СENF-L SRK 25 GZ-L1
SRK 328 HENF-L2 SRK 328 СENF-L
SRK 408 HENF-L3 SRK 408 СENF-L SRK 35 GZ-L1
SRK 50 HA SRK 50 СA
SRK 56 HA SRK 56 СA SRK 502 Z-L
поддерживаются в наличии на складе в Москве в течении всего 2002
года.

SRK 501 HENF-L, SRK 561 HENF-L

SRK 501 СENF-L, SRK 561 СENF-L
поставлялись в 2001 году. Сняты с производства, поставки в 2002
году не планируются.

Указанные модели поставляются на фреоне R22. Возможна поставка

на фреоне R407.

Информацию по моделям на R407, а также старым моделям Вы можете

получить в компании Бьюфорт по тел. (095) 755-84-33.
CONTENTS

1.1 GENERAL INFORMATION ........................................................................ 53

1.1.1 Specific features ................................................................................. 53
1.1.2 How to read the model name ............................................................. 53
1.2 SELECTION DATA..................................................................................... 54
1.2.1 Specifications ...................................................................................... 54
1.2.2 Range of usage & limitations ............................................................. 58
1.2.3 Exterior dimensions............................................................................ 59
1.2.4 Piping system ...................................................................................... 61
1.3 ELECTRICAL DATA .................................................................................. 63
1.3.1 Electrical wiring .................................................................................. 63
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............. 65
1.4.1 Table of operation control .................................................................. 65
1.4.2 Details of operation control ............................................................... 66
1.5 APPLICATION DATA ................................................................................. 77
1.5.1 Selection of location for installation ................................................. 78
1.5.2 Installation of indoor unit ................................................................... 79
1.5.3 Installation of outdoor unit................................................................. 81
1.5.4 Refrigerant piping ............................................................................... 82
1.5.5 Test run ................................................................................................ 83
1.5.6 Precautions for wireless remote controller installation
and operation ...................................................................................... 84
1.6 MAINTENANCE DATA............................................................................... 85
1.6.1 Trouble shooting ................................................................................. 85
1.6.2 Servicing .............................................................................................. 89
1.6.3 Power supply remote operation ........................................................ 90

1-2
1.1 GENERAL INFORMATION
1.1.1 Specific features
The “Mitsubishi Daiya” room air conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit
and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with
operation control switch and the outdoor unit is composed of condensing unit with compressor.
(1) Remote control flap
The flap can be automatically controlled by operating wireless remote control.
¡ AUTO (Natural flow) : Flap operation is automatically control.
¡ Swing : This will swing the flap up and down.
¡ Memory flap : Once the flap position is set, the unit memorizes the position and continues to
operate at the same position from the next time.
(2) Automatic Operation
When the remote control switch is set on “auto”, it will either automatically decide operation mode such as cooling,
heating and thermal dry, or operate in the operation mode before it has been turned to automatic control.
(3) Self diagnosis Function
We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation
as follows.

}
RUN lamp is flashing. t Abnormality of heat
(1 Times/ 8sec.) exchanger sensor.
No lamps will flashing
when the unit is operating.
TIMER lamp is RUN lamp is flashing. t Abnormality of room
light up. (2 Times/ 8sec.) temperature sensor.

RUN lamp is flashing. t Abnormality of indoor

(6 Times/ 8sec.) fan motor.

RUN lamp is light t TIMER lamp is flashing. t Abnormality of outdoor

up. (5 Times/ 8sec.) unit.

1.1.2 How to read the model name

Example : SR K 32 8 H EN F - L

CE marking model
Flare connecting
Applicable power source …… See the specifications
H-Heat pump type C-Cool only type
Series No.
Product capacity
Wall mounted type room air conditioner
Split type room air conditioner

1-3
1.2 SELECTION DATA
1.2.1 Specifications
Model SRK208HENF-L (Indoor unit)
SRC208HENF-L (Outdoor unit)
Model SRK208HENF-L SRC208HENF-L
Item
Cooling capacity(1) W 1800/1850
Heating capacity(1) W 2000/2050
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 0.690/0.775
Operation data(1)

Running current (Cooling) A 3.4/3.6

Heating input kW 0.620/0.735
Running current (Heating) A 3.0/3.4
Inrush current A 17.3/18.9
COP (In cooling) 2.61/2.39
Noise level(5) dB(A) Cooling: 36/37 Heating: 38/39 Cooling: 46/47 Heating: 47/48
Exterior dimensions
mm 275 x 790 x 174 492 x 750 x 220
Height x Width x Depth
Color Ivory white Polar white
Net weight kg 7.5 27
Refrigerant equipment
– RM5485GNE2 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 0.65
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 0.62
Refrigerant oil R 0.35 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 16 17
Air flow (at High) (Cooling) 7.0/7.0 21/22
CMM
(Heating) 7.5/7.5 21/22
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow) –
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø9.52 (3/8")
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4m
piping

–
Gas line: 0.35m
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2.5m (3 cores with Earth)
Connection Size x Core number 1.5mm2 x 5 cores (Including earth cable)
wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –
Notes (1) The data are measured at the following conditions.
Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1

(2) The operation data are applied to the 220V or 240V districts respectively
(3) Limitation of Voltage application Minimum: 198V Maximum: 264V
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, (when it is less than 10 m, add 20g refrigerant per meter and when it is 10 to 15m, add 30g
refrigerant per meter.)
(5) Expressed in sound pressure level.

1-4
Model SRK288HENF-L (Indoor unit)
SRC288HENF-L (Outdoor unit)

Model SRK288HENF-L SRC288HENF-L

Item
Cooling capacity(1) W 2500/2500
Heating capacity(1) W 2900/3000
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 0.930/1.005
Operation data(1)

Running current (Cooling) A 4.5/4.6

Heating input kW 0.83/0.91
Running current (Heating) A 4.0/4.1
Inrush current A 18.2/19.6
COP (In cooling) 2.69/2.49
Noise level(5) dB(A) Cooling:38/39 Heating:38/41 Cooling:41/42 Heating:42/43
Exterior dimensions
mm 275 x 790 x 174 542 x 795 x 255
Height x Width x Depth
Color Off white Polar white
Net weight kg 7.5 33
Refrigerant equipment
– RM5512GNE1 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 0.9
Starting method – Line starting
Heat exchanger Louver fins & inner grooved tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 0.88
Refrigerant oil R 0.35 (SUNISO Z300HDS)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 16 11
Air flow (at High) (Cooling) 7.5/7.5 23
CMM
(Heating) 8.0/8.0 23
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow) –
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø9.52 (3/8")
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4m
piping

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1
(2) The operation data are applied to the 220V or 240V districts respectively
(3) Limitation of Voltage application Minimum: 198V Maximum: 264V
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, (when it is less 10 m, add 20g refrigerant per meter and when it is 10 to 15m, add 30g refrigerant
per meter.)
(5) Expressed in sound pressure level.

1-5
Model SRK328HENF-L2 (Indoor unit)
SRC328HENF-L2 (Outdoor unit)
Model SRK328HENF–L2 SRC328HENF–L2
Item
(1)
Cooling capacity W 3000/3000
Heating capacity(1) W 3800/3800
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 1.39/1.49
Operation data(1)

Running current (Cooling) A 6.9/6.9

Heating input kW 1.19/1.32
Running current (Heating) A 6.1/6.1
Inrush current A 33.6/36.6
COP (In cooling) 2.16/2.01
Noise level(5) dB(A) Cooling: 40/42 Heating: 41/43 Cooling: 44/46 Heating: 45/47
Exterior dimensions
mm 275 x 790 x 174 542 x 795 x 255
Height x Width x Depth
Color Ivory white Polar white
Net weight kg 8 37
Refrigerant equipment
– RM5517GNE2 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 1.3
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 0.74
Refrigerant oil R 0.6 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 16 15
Air flow (at High) (Cooling) 8.5/8.5 24/24.5
CMM
(Heating) 9.5/9.5 24/24.5
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow) –
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4m
piping

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1
(2) The operation data are applied to the 220V or 240V districts respectively
(3) Limitation of Voltage application
Minimum: 198V Maximum: 264V
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, when it is 10 m, add 20g refrigerant per meter and when it is 10 to 15m, add 30g refrigerant per meter.
(5) Expressed in sound pressure level.
1-6
COP (CALOR) = 4.1/1.46 *100 = 280.82%
Model SRK408HENF-L3 (Indoor unit)
SRC408HENF-L3 (Outdoor unit)
EER (FRIO) = 3.5/1.40 *100 = 250%

Model SRK408HENF-L3 SRC408HENF-L3

Item
(1)
Cooling capacity W 3500/3500
Heating capacity(1) W 4100/4100
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 1.320/1.405 POT.NOMINAL
Running current (Cooling) A 6.4/6.4
Heating input kW 1.335/1.460
Operation data(1)

Running current (Heating) A 6.5/6.5

Inrush current A 33.6/36.6
COP (In cooling) 2.65/2.49
Sound level Hi : 40/42 Lo : 31/32 47/49
Cooling
Power level Hi : 54/56 Lo : 45/46 61/63
Noise level dB
Sound level Hi : 41/43 Lo : 39/40 48/50
Heating
Power level Hi : 55/57 Lo : 53/54 62/64
Exterior dimensions
mm 275 x 790 x 174 542 x 795 x 255
Height x Width x Depth
Color Ivory white Polar white
Net weight kg 8 37
Refrigerant equipment
– RM5516GNVE4 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 1.3
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 1.3
Refrigerant oil R 0.6 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 16 18
Air flow (at High) (Cooling) 8.5/8.5 22/22.5
CMM
(Heating) 9.5/9.5 22/22.5
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow) –
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Refrigerant

Connecting method Flare connecting

piping

Attached length of piping Liquid line: 0.4m Gas line : 0.35m –

Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2.5m (3 cores with Earth)
Connection Size x Core number 1.5mm2 x 5 cores (Including earth cable)
wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220V or 240V districts respectively
(3) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping. (Purging is not required even in the short piping.)
If the piping length is longer, when it is 10 m, add 20g refrigerant per meter and when it is 10 to 15m, add 30g refrigerant per meter.
(4) When the unit is operated in cooling or dehumidification mode at the outside air temperature of 1ºC and less, there is a possibility that water leakage
occurs at the indoor unit.

1-7
Model SRK501HENF-L (Indoor unit)
SRC501HENF-L (Outdoor unit)
Model SRK501HENF–L SRC501HENF–L
Item
Cooling capacity(1) W 4500/4500
Heating capacity(1) W 5700/5800
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 1.78/1.88
Operation data(1)

Running current (Cooling) A 8.4/8.2

Heating input kW 1.76/1.89
Running current (Heating) A 8.5/8.3
Inrush current A 39/42
COP (In cooling) 2.53/2.39
Noise level(5) dB(A) Cooling: 44/44 Heating: 45/45 Cooling: 50/51 Heating: 53/54
Exterior dimensions
mm 275‚790‚189 615‚850‚290 + 30
Height x Width x Depth
Color Ivory white Polar white
Net weight kg 9 53
Refrigerant equipment
– RM5523GNE4 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 1.7
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 1.28
Refrigerant oil R 0.7 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 23 40
Air flow (at High) (Cooling) 11/11 34/34
CMM
(Heating) 12/12 34/34
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow),
–
ECONO (Orange), HI POWER (Green)
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4m
piping

–
Gas line: 0.35m
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2.5m (3 cores with Earth)
Connection Size x Core number 1.5mm2 x 5 cores (With Earth)
wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1
(2) The operation data are applied to the 220V or 240V districts respectively
(3) Limitation of Voltage application Minimum: 198V Maximum: 264V
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, (when it is 10 m, add 20g refrigerant per meter and when it is 10 to 15m, add 30g refrigerant per
meter.)
(5) Expressed in sound pressure level.

1-8
Model SRK561HENF-L (Indoor unit)
SRC561HENF-L (Outdoor unit)
Model SRK561HENF–L SRC561HENF–L
Item
Cooling capacity(1) W 5000/5000
Heating capacity(1) W 6200/6300
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 2.08/2.18
Operation data(1)

Running current (Cooling) A 10.2/9.53

Heating input kW 2.02/2.15
Running current (Heating) A 10.5/9.95
Inrush current A 44/48
COP (In cooling) 2.40/2.29
Noise level(5) dB(A) Cooling: 45/45 Heating: 46/46 Cooling: 53/54 Heating: 54/56
Exterior dimensions
mm 275‚790‚189 615‚850‚290 + 30
Height x Width x Depth
Color Ivory white Polar white
Net weight kg 9 53
Refrigerant equipment
– RM5526GNE4 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 1.9
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 1.35
Refrigerant oil R 0.7 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 23 40
Air flow (at High) (Cooling) 12/12 34/34
CMM
(Heating) 13/13 34/34
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow),
–
ECONO (Orange), HI POWER (Green)
Safety equipment – Dome mounted protector (for compressor)
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4m
piping

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1
(2) The operation data are applied to the 220V or 240V districts respectively
(3) Limitation of Voltage application Minimum: 198V Maximum: 264V
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, (when it is 10 m, add 20g refrigerant per meter and when it is 10 to 15m, add 30g refrigerant per
meter.)
(5) Expressed in sound pressure level.

1-9
Model SRK50A (Indoor unit)
SRC50HA (Outdoor unit)
Model SRK50A SRC50HA
Item
(1)
Cooling capacity W 4500
Heating capacity(1) W 5700
Power source 1 Phase, 220/230/240V, 50Hz
Cooling input kW 1.79
Running current (Cooling) A 8.4/8.0/7.7
Heating input kW 1.83
Operation data(1)

Running current (Heating) A 8.5/8.1/7.9

Inrush current A 39/41/42
COP (In cooling) 2.51
Sound level Hi : 44 Lo : 37 51
Cooling
Power level Hi : 58 Lo : 51 65
Noise level dB
Sound level Hi : 45 Lo : 38 53
Heating
Power level Hi : 59 Lo : 52 67
Exterior dimensions
mm 298‚798‚203 640‚850‚290
Height x Width x Depth
Color Stucco white Stucco white
Net weight kg 10 45
Refrigerant equipment
– RM5523GNE4 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 1.7
Starting method – Line starting
Heat exchanger Louver fins & grooved tubing
Refrigerant control Capillary tubes
Refrigerant(3) kg R22 1.45
Refrigerant oil R 0.7 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 23 35
Air flow (at High) (Cooling) 11 39
CMM
(Heating) 13 39
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow),
–
ECONO (Orange), HI POWER (Green)
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Refrigerant

Connecting method Flare connecting

piping

Attached length of piping Liquid line: 0.5m Gas line: 0.43m –

Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 3m (3 cores with Earth)
Connection Size x Core number 1.5mm2 x 5 cores (With Earth)
wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220V, 230V or 240V districts respectively
(3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping. (Purging is not required even in the short piping.)
If the piping length is longer. (When it is 7 to 15 m, add 20 g refrigerant per meter.)
(4) When the unit is operated in cooling or dehumidification mode at the outside air temperature of 1ºC and less, there is a possibility that water leakage
occurs at the indoor unit.
1-10
Model SRK56A (Indoor unit)
SRC56HA (Outdoor unit)
Model SRK56A SRC56HA
Item
Cooling capacity(1) W 5000
Heating capacity(1) W 6200
Power source 1 Phase, 220/230/240V, 50Hz
Cooling input kW 2.08
Running current (Cooling) A 9.7/9.3/8.9
Heating input kW 2.10
Operation data(1)

Running current (Heating) A 9.8/9.4/9.0

Inrush current A 44/46/48
COP (In cooling) 2.40
Sound level Hi : 45 Lo : 38 51
Cooling
Power level Hi : 59 Lo : 52 65
Noise level dB
Sound level Hi : 45 Lo : 38 53
Heating
Power level Hi : 59 Lo : 52 67
Exterior dimensions
mm 298‚798‚203 640‚850‚290
Height x Width x Depth
Color Stucco white Stucco white
Net weight kg 10 45
Refrigerant equipment
– RM5526GNE4 (Rotary type) x 1
Compressor type & Q’ty
Motor kW – 1.9
Starting method – Line starting
Heat exchanger Louver fins & grooved tubing
Refrigerant control Capillary tubes
Refrigerant(3) kg R22 1.45
Refrigerant oil R 0.7 (BARREL FREEZE 32SAM)
Defrost control MC control
Air handling equipment
Tangential fan x 1 Propeller fan x 1
Fan type & Q’ty
Motor W 23 35
Air flow (at High) (Cooling) 11 39
CMM
(Heating) 13 39
Air filter, Q’ty Polypropylene net (washable) x 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Operation control
Wireless–Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow),
–
ECONO (Orange), HI POWER (Green)
Safety equipment – Dome mounted protector (for compressor)
Internal thermostat (for fan motor)
O.D mm(in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Refrigerant

Connecting method Flare connecting

piping

Attached length of piping Liquid line: 0.5m Gas line: 0.43m –

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220V, 230V or 240V districts respectively
(3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping. (Purging is not required even in the short piping.)
If the piping length is longer. (When it is 7 to 15 m, add 20 g refrigerant per meter.)
(4) When the unit is operated in cooling or dehumidification mode at the outside air temperature of 1ºC and less, there is a possibility that water leakage
occurs at the indoor unit.

1-11
Model SRK208CENF-L (Indoor unit)
SRC208CENF-L (Outdoor unit)
Model SRK208CENF-L SRC208CENF-L
Item
Cooling capacity(1) W 1800/1850
Power source 1 Phase, 220/240 V, 50 Hz
Cooling input kW 0.54/0.58
Operation

Running current (Cooling) A 2.5/2.6

data(1)

Inrush current A 11.7/12.8

COP (In cooling) 3.33/3.19
Noise level(5) dB (A) 36/37 44/45
Exterior dimensions mm
275 × 790 × 174 492 × 750 × 220
Height × Width × Depth
Color Ivory white Polar white
Net weight kg 7.5 24
Refrigerant equipment
– RM5470GNE5 (Rotary type) × 1
Compressor types & Q’ty
Motor kW – 0.55
Starting method – Line starting
Heat exchanger Louver fins & tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 0.57
Refrigerant oil R 0.3 (BARREL FREEZE 32SAM)
Air handling equipment
Tangential fan × 1 Propeller fan × 1
Fan type & Q’ty
Motor W 16 17
Air flow (at High) CMM 7/7 19.5/20.5
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless-Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow) –
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm (in) Liquid line: φ6.35 (1/4") Gas line: φ9.52 (3/8")
Refrigerant

Connecting method Flare connecting

piping

Attached length of piping Liquid line: 0.4 m

Model SRK50A SRC50CA

Item
(1)
Cooling capacity W 4500
Power source 1 Phase, 220/230/240V, 50 Hz
Cooling input kW 1.79
Operation data(1)

Running current (Cooling) A 8.4/8.0/7.7

Inrush current A 39/41/42
COP (In cooling) 2.51
Sound level Hi : 44 Lo : 37 51
Noise level dB
Power level Hi : 58 Lo : 51 65
Exterior dimensions mm
298 × 798 × 203 640 × 850 × 290
Height × Width × Depth
Color Noble white Stucco white
Net weight kg 10 44
Refrigerant equipment
– RM5523GNE4 (Rotary type) × 1
Compressor types & Q’ty
Motor kW – 1.7
Starting method – Line starting
Heat exchanger Louver fins & grooved tubing
Refrigerant control Capillary tubes
Refrigerant(3) kg R22 1.45
Refrigerant oil R 0.7 (BARREL FREEZE 32SAM)
Air handling equipment
Tangential fan × 1 Propeller fan × 1
Fan type & Q’ty
Motor W 23 35
Air flow (at High) CMM 11 39
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless-Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow),
–
ECONO (Orange), HI POWER (Green)
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm (in) Liquid line: φ6.35 (1/4") Gas line: φ12.7 (1/2")
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.5m
piping

–
Gas line : 0.43m
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 3 m (3 cores with Earth)
Connection Size × Core number 1.5 mm2 × 3 cores (Including earth cable)
wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27°C 19°C 35°C 24°C ISO-T1, JIS C9612
(2) The operation data are applied to the 220V, 230V or 240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, (When it is 7 to 15 m, add 20 g refrigerant per meter.)
(4) When the unit is operated in cooling or dehumidification mode at the outside air temperature of 1ºC and less, there is a possibility that water leakage
occurs at the indoor unit.

1-19
Model SRK56A (Indoor unit)
SRC56CA (Outdoor unit)
Model SRK56A SRC56CA
Item
(1)
Cooling capacity W 5000
Power source 1 Phase, 220/230/240V, 50 Hz
Cooling input kW 2.08
Operation data(1)

Running current (Cooling) A 9.7/9.3/8.7

Inrush current A 44/46/48
COP (In cooling) 2.40
Sound level Hi : 45 Lo : 38 54
Noise level dB
Power level Hi : 59 Lo : 52 68
Exterior dimensions mm
298 × 798 × 203 640 × 850 × 290
Height × Width × Depth
Color Noble white Stucco white
Net weight kg 10 44
Refrigerant equipment
– RM5526GNE4 (Rotary type) × 1
Compressor types & Q’ty
Motor kW – 1.9
Starting method – Line starting
Heat exchanger Louver fins & grooved tubing
Refrigerant control Capillary tubes
Refrigerant(3) kg R22 1.45
Refrigerant oil R 0.7 (BARREL FREEZE 32SAM)
Air handling equipment
Tangential fan × 1 Propeller fan × 1
Fan type & Q’ty
Motor W 23 35
Air flow (at High) CMM 11 39
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless-Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow),
–
ECONO (Orange), HI POWER (Green)
Safety equipment Dome mounted protector (for compressor)
–
Internal thermostat (for fan motor)
O.D mm (in) Liquid line: φ6.35 (1/4") Gas line: φ12.7 (1/2")
Refrigerant

Connecting method Flare connecting

piping

Attached length of piping Liquid line: 0.5m

Notes (1) The data are measured at the following conditions.

1-20
1.2 SELECTION DATA
1.2.1 Specifications
Model SRK25GZ-L1 (Indoor unit)
SRC25GZ-L1 (Outdoor unit)
Model SRK25GZ-L1 SRC25GZ-L1
Item
Cooling capacity(1) W 2500 [900~2900]
Heating capacity(1) W 3400 [900~4000]
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 0.96 [0.31~1.22]
Operation data(1)

Running current (Cooling) A 4.8

Heating input kW 1.17 [0.28~1.35]
Running current (Heating) A 5.8
Inrush current A 5.8
COP (In cooling) 2.60
Noise level dB (A) Cooling: 38 Heating: 39 Cooling: 46 Heating: 46
Exterior dimensions
250 × 750 × 178 540 × 645 × 245
Height × Width × Depth mm
Color Ivory white Polar white
Net weight kg 7.5 28
Refrigerant equipment
– RM5465GA1 (Rotary type) × 1
Compressor type & Q’ty
Motor kW – 0.75
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 0.64 (Pre-Charged up to the piping length of 5m)
Refrigerant oil R 0.35 (BARREL FREEZE 32SAM)
Deice control MC control
Air handling equipment
Tangential fan × 1 Propeller fan × 1
Fan type & Q’ty
Motor W 18 20
(Cooling) 7.0 21
Air flow (at High) CMM
(Heating) 7.5 21
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless-Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow)
Safety equipment Compressor: Overheat protection, heating overload protection (High pressure control), overcurrent pro-
tection, serial signal error protection, indoor fan motor error protection
O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ9.52 (3/8″)
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4 m
piping

–
Gas line : 0.35 m
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2.5 m (3 cores with Earth)
Size × Core number 1.5 mm2 × 4 cores (Including earth cable)
Connection wiring
Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –
Notes (1) The data are measured at the following conditions.
Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1
(2) The values for performance and power consumption shown in brackes [~] indicate the range from minimum to maximum.
(3) The operation data are applied to the 220/240V districts respectively.
(4) Limitation of Voltage application Minimum: 198V Maximum: 264V
(5) The refrigerant quantity to be charged includes the refrigerant in 5 m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer,
(When it is 5 to 15 m, add 20 g refrigerant per meter.)

1-21
Model SRK35GZ-L1 (Indoor unit)
SRC35GZ-L1 (Outdoor unit)

Model SRK35GZ-L1 SRC35GZ-L1

Item
Cooling capacity(1) W 3650 [900~3900]
Heating capacity(1) W 4800 [900~6100]
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 1.24 [0.35~1.60]
Operation data(1)

Running current (Cooling) A 6.3

Heating input kW 1.52 [0.35~2.10]
Running current (Heating) A 7.7
Inrush current A 7.7
COP (Cooling) 2.94
Noise level dB (A) Cooling: 39 Heating: 42 Cooling: 46 Heating: 47
Exterior dimensions
275 × 790 × 174 542 × 795 × 255
Height × Width × Depth mm
Color Ivory white Polar white
Net weight kg 8 35
Refrigerant equipment
– RM5485GAE3 [Rotary type] × 1
Compressor type & Q’ty
Motor kW – 0.75
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Capillary tubes
Refrigerant(4) kg R22 1.1 (Pre-Charged up to the piping length of 5m)
Refrigerant oil R 0.35 (BARREL FREEZE 32SAM)
Deice control MC control
Air handling equipment
Tangential fan × 1 Propeller fan × 1
Fan type & Q’ty
Motor W 16 18
(Cooling) 7 24
Air flow (at High) CMM
(Heating) 10 24
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless-Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow)
Safety equipment Compressor: Overheat protection, heating overload protection (High pressure control), overcurrent
protection, frosting protection, serial signal error protection, indoor fan motor error protection
O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ12.7 (1/2″)
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4 m
piping

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1

(2) The values for performance and power consumption shown in brackets [~] indicate the range from minimum to maximum.
(3) The operation data are applied to the 220/240V districts respectively.
(4) Limitation of Voltage application Minimum: 198V Maximum: 264V
(5) The refrigerant quantity to be charged includes the refrigerant in 5 m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer,
(When it is 5 to 15 m, add 20 g refrigerant per meter.)

1-22
Model SRK502Z-L (Indoor unit)
SRC502Z-L (Outdoor unit)

Model SRK502Z-L SRC502Z-L

Item
Cooling capacity(1) W 5000 [900~5600]
Heating capacity(1) W 6700 [900~7900]
Power source 1 Phase, 220/240V, 50Hz
Cooling input kW 2.22 [0.17~2.65]
Operation data(1)

Running current (Cooling) A 10.2

Heating input kW 2.50 [0.145~2.55]
Running current (Heating) A 11.5
Inrush current A 11.5
COP (Cooling) 2.25
Noise level dB (A) Cooling: 43 Heating: 43 Cooling: 48 Heating: 48
Exterior dimensions
275 × 790 × 189 595 × 720 × 290
Height × Width × Depth mm
Color Ivory white Polar white
Net weight kg 9 36
Refrigerant equipment
– GR5490FD4 [Scroll type] × 1
Compressor type & Q’ty
Motor kW – 1.5
Starting method – Line starting
Heat exchanger Louver fins & bare tubing
Refrigerant control Electric expansion valve
Refrigerant(4) kg R22 1.24 (Pre-Charged up to the piping length of 7m)
Refrigerant oil R 0.35 (BARREL FREEZE 32SAM)
Deice control MC control
Air handling equipment
Tangential fan × 1 Propeller fan × 1
Fan type & Q’ty
Motor W 26 35
(Cooling) 10 26
Air flow (at High) CMM
(Heating) 10.5 30
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater – –
Operation control
Wireless-Remote controller –
Operation switch
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), ECONO (Orange), HI POWER (Green)
Safety equipment Compressor: Overheat protection, heating overload protection (High pressure control), overcurrent protection,
frosting protection, serial signal error protection, indoor fan motor error protection, Comp. rotor lock
O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ12.7 (1/2″)
Refrigerant

Connecting method Flare connecting

Attached length of piping Liquid line: 0.4 m
piping

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature
Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC JIS C9612, ISO-T1
Heating 20ºC – 7ºC 6ºC JIS C9612, ISO-T1

(2) The values for performance and power consumption shown in brackets [~] indicate the range from minimum to maximum.
(3) The operation data are applied to the 220/240V districts respectively.
(4) Limitation of Voltage application Minimum: 198V Maximum: 264V
(5) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer,
(When it is 7 to 25 m, add 20 g refrigerant per meter.)

1-23
1.2.2 Range of usage & limitations
(1) Inlet air temperature
(a) Cooling operation (b) Heating operating

Applicable temp. range

Applicable temp.
range
Outdoor air temp. ºC D. B.

JIS-Cooling

Indoor air temp. ºC D. B.

JIS-Heating

Indoor air temp. ºC W. B.

Note: The chart is the result from the continu-

ous operation under constant air tempera-
ture conditions, however, excludes the
initial pull-down stage.
Outdoor air temp. ºC W. B.

Note: The chart is the result from the continuous

operation under constant air temperature con-
ditions, however, excludes the initial pull-
down stage and any possible defrost cycles.

(2) Total one way piping length and vertical height difference.

Models
All models
Item
Total one way piping length (m) 15
Vertical height Outdoor unit is higher 5
difference (m) Outdoor unit is lower 5

(3) Voltage application

Models
All models
Item
Minimum (V) 198
Maximum (V) 264

1-24
1.2.3 Exterior dimensions
(1) Indoor unit
Models SRK 208, 288, 328, 408 -HENF, -CENF, 258CENF Unit: mm
A
790 174 3

Room temp. sensor

Piping hole right (left)

275

56
Terminal block

9
15 760 15 49

170 450 170 20, 28, 32, 40 models 41 models

9
46

161.5
117
61

260
187.5

60 16 60 20.5

Remote controller
780
6
36

Piping for Gas 51

* 62 18
( 20, 28: Ø9.52
)
32, 40, 41, Ø12.7 390
67
Piping for Liquid (Ø6.35) 440

37
Drain hose 600 (Ø16)

Piping hole Piping hole

(Ø65) (Ø65) VIEW A
NOTE(1) Models 20 and 28 have no inlet opening indicated by * mark.

Models SRK501H(C)ENF-L, 561H(C)ENF-L

1-25
Models SRK50A, 56A
(2) Outdoor unit
Model SRC208 H(C) ENF-L
Unit: mm

Oval holes (4–16x12) 50 MAX 61

60 Drain holes

14
68
220

237
265
44

250

14
120 510 120 30
750 Terminal block
492

65 78
45˚
45˚
80
15

Service valve (Gas)

Service Flare fitting
valve (Liquid) Ø9.52 (3/8˝)
Flare fitting
Ø6.35 (1/4˝)

Models SRC 288, 328, 408 -HENF -CENF, 258 CENF

Unit: mm
50
55 Drain holes MAX 80
22
14
58

65 93
255
272
44

265
23
14

795

Terminal block
542
539

32 115
413

40
45˚
16x12 (Oval holes)
for unit fixing 45˚
2 places
65

58 44
15

Drain holes
142.5 510 142.5 33 Service Service
50

valve (Liquid) valve (Gas)

14 272 14 Flare fitting Flare fitting
Ø6.35 (1/4˝) 28: Ø9.52 (3/8˝)
300 32, 40,41: Ø12.7 (1/2˝)

1-27
Models SRC501H(C)ENF, 561H(C)ENF

170 510 170 Unit: mm

87 87
15 15

25
19
307
345
Oval (M10x4) holes

30
19
for Anchor bolt

850 30 290
70.5 100

Service Lebel model

valve (Gas) name
Ø12.7 (1/2˝)
615

475

55
25
17

Drain pipe 60 Service valve (Liquid)

Ø6.35 (1/4˝)

1-28
Models SRC50C(H)A, 56C(H)A
286.4 Drain hole 50
12

12
43.5
290

314

328
49.6

14
476
203.1 510 136.9 Elogated hole
(2-12X16)
850

Terminal block

124 34.6
640

Ground
terminal
42.7

Service valve (Liquide)

Ø6.35 (1/4'')
20˚

Service valve (Gas)

100.3

20˚

Ø12.7 (1/2'')
15

1-29
1.2.3 Exterior dimensions
(1) Indoor unit
Model SRK25GZ-L1 Unit: mm
A Room temp. 178 3
750 thermistor

Piping hole right (left)

56
250

9
49
75 615 75 Terminal
block
150 450 150

117
46

9
236.5
15

60 16

Remote controller
746.9
36

92 40
4.5
36

7.5 62 62 7.5
Piping for Gas (Ø9.52) 370

Piping for Liquid (Ø6.35) 420

37
40

Piping hole Piping hole

(Ø65) (Ø65)
VIEW A
Model SRK35GZ-L1
Unit: mm
A
790 174 3

Room temp.
thermistor
Piping hole right (left)
275

Terminal block
9

15 760 15 49

170 450 170

9
46

117
61

260
187.5

60 16
Remote controller
6
36

51 780
Piping for Gas
(Ø12.7) 390 62 18
67
Piping for Liquid (Ø6.35) 440
Drain hose 600 (Ø16)
37

Piping hole Piping hole

(Ø65) (Ø65)
1-30 VIEW A
Model SRK502Z-L Unit: mm

Remote controller

(2) Outdoor unit

Model SRC25GZ-L1 50
Unit: mm
13.5

192.5 Drain holes 12

42
245

274.5
300
44

372.5
23
12

82.5 480 82.5 2-Ø12 Terminal

645 61.5 block

127.7 33.3
Service valve (Liquid)
Flare connecting Ø6.35 (1/4˝)
540

39.7

40˚ 40˚
100.3

Service valve (Gas)

14.4

Flare connecting Ø9.52 (3/8˝)

1-31
Model SRC35GZ-L1

50
55 Unit : mm
Drain holes MAX.80

22
14
58

65 93
255
272
44

23
14
265
795

Terminal block

32 115
542
539

413
40 45°
16 12 (Oval holes) 45°
for unit fixing
2 places

65
58 44
15

Drain holes Service

142.5 510 142.5 33 Valve Service
50

(Liquid) Valve (Gas)

14 272 14 Flare connecting Flare connecting
300 Ø6.35 (1/4¨) Ø12.7 (1/2¨)

Model SRC502Z-L

Unit: mm

1-32
1.2.4 Piping system
Model SRK328HENF-L2

Cooling cycle
Heating cycle
Indoor unit Outdoor unit

Service valve (Gas)

High pressure switch (63H)
Flare connecting (for fan motor control)

Piping (Gas)
Ø12.7 Check
Room joint Discharge
temperature
sensor Compressor Accumulator Heat exchanger
Heat exchanger Heat
exchanger 4way valve
sensor

Suction

Defrost
Piping (Liquid) thermostat
Ø6.35
Strainer
Flare connecting Service valve (Liquid) Capillary tube

Model SRK408HENF-L2

Cooling cycle
Indoor unit Outdoor unit Heating cycle

Service valve (Gas)

High pressure switch (63H)
Flare connecting (for fan motor control)

Piping (Gas)
Ø12.7 Check
Room joint Discharge
temperature
sensor Accumulator
Compressor
Heat Heat exchanger
Heat exchanger exchanger 4way valve
sensor

Suction

Capillary tube Defrost

Piping (Liquid) thermostat
Ø6.35 Strainer
Flare connecting Service valve (Liquid) Check valve

1-33
Models SRK501HENF-L, 561HENF-L
Cooling cycle
Indoor unit Outdoor unit Heating cycle

Service valve (Gas)

Flare connecting
High pressure switch(63H)
(for fan motor control)

Piping (Gas)
Ø12.7 Check
joint
4way valve
Heat Discharge Heat exchanger
Room exchanger Accumulator
temperature thermistor
Deicer
thermistor thermostat
Compressor
Muffler

Heat exchanger
Suction

Capillary tube

Piping (Liquid)
Ø6.35 Strainer

Flare connecting Service valve (Liquid)

Models SRK50HA, 56HA

Cooling cycle
Indoor unit Outdoor unit Heating cycle

Service valve (Gas)

Flare connecting
High pressure switch(63H)
(for fan motor control)

Piping (Gas)
Ø12.7 Check
joint
4way valve
Heat Discharge Heat exchanger
Room exchanger Accumulator
temperature thermistor
Deicer
thermistor thermostat
Compressor
Muffler

Heat exchanger
Suction Capillary tube

Piping (Liquid)
Ø6.35 Strainer

Flare connecting Service valve (Liquid)

1-34
Models SRK501CENF-L, 561CENF-L

Indoor unit Outdoor unit

Model SRK208HENF-L

Cooling cycle
Indoor unit Outdoor unit Heating cycle

Service valve (Gas)

Flare connecting

Piping (Gas)
Ø9.52
Check
Room joint Discharge
temperature
sensor Compressor Accumulator
Heat Heat exchanger
Heat exchanger exchanger 4way valve
sensor

Suction

Piping (Liquid)
Ø9.52 Strainer
Capillary tube
Flare connecting Service valve (Liquid)

1-36
Models SRK288HENF-L, 328HENF-L

Cooling cycle
Indoor unit Outdoor unit Heating cycle

Service valve (Gas)

Flare connecting

Piping (Gas)

Room
(28:Ø9.52
32:Ø12.7)
Check
joint Discharge
temperature
sensor Compressor Accumulator Heat exchanger
Heat exchanger Heat
exchanger 4way valve
sensor

Suction

Piping (Liquid)
Ø6.35
Strainer
Flare connecting Service valve (Liquid) Capillary tube

Models SRK50CA, 56CA

Indoor unit Outdoor unit

Service valve (Gas)

Flare connecting
Cooling cycle

Piping (Gas)
ø12.7 Check joint
Room Muffler
temperature
thermistor Discharge
Accumulator
Heat Heat Heat
exchanger exchanger exchanger
thermistor Suction

Compressor

Capillary tube
Piping (Liquid) ø6.35

Service valve (Liquid)

Flare connecting

1-37
1.2.4 Piping system
Models SRK208CENF-L, 258CENF-L, 288CENF-L, 328CENF-L, 408CENF-L

Cooling cycle
Indoor unit Outdoor unit

Flare connecting Service valve (Gas)

Piping (Gas)

( 20, 25,
32, 40 : ø12.7 )
28 : ø9.52

Check joint Discharge

Room
Heat exchanger

Heat exchanger
temperature Accumulator
sensor

Compressor

Heat Suction
exchanger
sensor
Capilary tube
ø6.35
Piping (Liquid)
Service valve (Liquid)
Flare connecting

1-38
1.2.4 Piping system

Model SRK25GZ-L1
Indoor unit Outdoor unit Cooling cycle
Heating cycle Outdoor air
Flare connecting Service valve temp. thermistor
(Gas)

Piping Check joint

(Gas)
ø9.52
4 way valve
Accumulator

Room temp. Discharge temp. Heat

thermistor Heat thermistor exchanger
exchanger
thermistor
Heat
exchanger Compressor Heat exchanger
thermistor
Piping
(Liquid) Service valve (Liquid)
ø6.35
Capillary tube

Strainer
Flare connecting

Model SRK35GZ-L1

Cooling cycle
Indoor unit Outdoor unit Heating cycle

Service valve (Gas)

Flare connecting
Outdoor air
temp. thermistor
Piping (Gas)
Ø12.7
Check
Room joint Discharge
temp.
thermistor Compressor
Heat Accumulator
exchanger 4way valve Heat exchanger
Heat exchanger thermistor
Discharge temp.
thermistor
Suction

Capillary tube Heat exchanger

Piping (Liquid) thermistor
Ø6.35 Strainer
Flare connecting Service valve (Liquid) Check valve

1-39
Model SRK502Z-L

1-40
1.3 ELECTRICAL DATA
1.3.1 Electrical wiring
Models SRK50CA, 56CA
Power source Indoor unit Outdoor unit
1 Phase 220/230/240V 50Hz

Y/GN
BL OR BL
BR 4 4
RD BL F (250V 100mA)
3 3
Y/GN WH WH
2 2
BK BK
1 1
RD
52C-4 G 52C-3 S 20S 23D
52C BK
52C
TH1
51C
PC

CNG
BL 52X1
5 52X1 TH2 BK
Y F WH
4
FMI
WH
BK
3 (250V
3.15A ) FM0
OR

2 CM
RD
1 WH
CNU OR
Wireless RD
CNH

R-Amp WH
ZNR CF0 Cc
Display
CNM WH
LM
Back up sw
CNE

OR WH
Printed circuit board WH

Note(1) This figure shows SRK56CA. As for

SRK50CA, 51C differs as shown in the fig-
ure below.
51C

Note(2) When an abnormality occurred on the out-

door unit for the cooling only model, check
the fuse on the outdoor unit. If the fuse is
burnt out, replace it with new one.
Color symbol Meaning of marks
BK Black Symbol Parts name Symbol Parts name
BL Blue CC Capacitor for CM LM Louver motor
BR Brown CFO Capacitor for FMO Th1, 2 Thermistor
RD Red CM Compressor motor ZNR Varistor
OR Orange F Fuse 51C Motor protector for CM
WH White FMI Fan motor (Indoor unit) 52C Magnetic contactor for CM
Y Yellow FMO Fan motor (Outdoor unit)
Y/GN Yellow/Green

Table of relay operations

Operation
Cooling
Relay symbol Control part
52C CM

Notes (1) : denotes magentized relay ×: denotes demagnetized relay

(2) Th1 is room temperature thermistor. Th2 (the heat exchanger thermistor) is frost prevention thermistor.

1-41
Models SRK501CENF-L, 561CENF-L

Power source Indoor unit Outdoor unit

1 Phase 220/240V 50Hz

LB
BR

BL 1 2
Y F
2
WH 250V
I
BK
3 (
3.15A )
4
RD
5
H

Wireless
R-Amp

Display
Printed circuit board

Color symbol Meaning of marks

BK Black Symbol Parts name Symbol Parts name
BL Blue CC Capacitor for CM LM Louver motor
BR Brown CFO Capacitor for FMO Th1, 2 Thermistor
RD Red CM Compressor motor ZNR Varistor
OR Orange F Fuse 51C Motor protector for CM
WH White FMI Fan motor (Indoor unit) 52C Magnetic contactor for CM
Y Yellow FMO Fan motor (Outdoor unit)
LB Light blue
Y/GN Yellow/Green

Table of relay operations

Operation
Cooling
Relay symbol Control part
52C CM

Notes (1) : denotes magentized relay ×: denotes demagnetized relay

(2) Th1 is room temperature thermistor. Th2 (the heat exchanger thermistor) is frost prevention thermistor.

1-42
Model SRK208CENF-L

Indoor unit Outdoor unit

Power source
1 Phase 220/240V 50Hz

Wireless
R-Amp

Display

Printed circuit board

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y/GN Yellow/Green

Meaning of marks
Symbol Parts name Symbol Parts name
CC Capacitor for CM LM Louver motor
CFI Capacitor for FMI Th1, 2 Thermistor
CFO Capacitor for FMO Tr Transformer
CM Compressor motor ZNR Varistor
F Fuse 51C Motor protector for CM
FMI Fan motor (Indoor unit) 52C Magnetic contactor for CM
FMO Fan motor (Outdoor unit)

Table of relay operations

Operation
Cooling
Relay symbol Control part
52C CM

Notes (1) ; denotes magentized relay ×: denotes demagnetized relay

(2) Th1 is room temperature sensor. Th2 (the heat exchanger sensor) is frost prevention sensor. (for details, refer to pages 74)

1-43
Models SRK258CENF-L, 288CENF-L, 328CENF-L, 408CENF-L

Indoor unit Outdoor unit

Power source
1 Phase 220/240V 50Hz

Wireless
R-Amp
Display

Printed circuit board

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y/GN Yellow/Green

Table of relay operations

Operation
Cooling
Relay symbol Control part
52C CM

Notes (1) ; denotes magentized relay ×: denotes demagnetized relay

(2) Th1 is room temperature sensor. Th2 (the heat exchanger sensor) is frost prevention sensor. (for details, refer to pages 74)

1-44
Model SRK208HENF-L Indoor unit Outdoor unit

Power source
1Phase 220/240V 50Hz

Wireless
R-Amp
Display
Printed circuit board

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y/GN Yellow/Green

Meaning of marks

Symbol Parts name Symbol Parts name

Cc Capacitor for CM Th1, 2 Thermistor
CFI Capacitor for FMI Tr Transformer
CFO Capacitor for FMO ZNR Varistor
CM Compressor motor 20S 4 way valve, coil
F Fuse 51C Motor protector for CM
FMI Fan motor (Indoor unit) 52C Magnetic contactor for CM
FMO Fan motor (Outdoor unit) 52X4, 5 Auxiliary relay
LM Louver motor

Table of relay operations

Operation
Relay Control Cooling Heating Defrost
symbol part
52X4 20S × ×
52X5 FMO ×
52C CM

Notes (1) : denotes magentized relay × : denotes demagnetized relay

(2) Th1 is room temperature sensor. Th2 (the heat exchanger sensor) is the hot start, hot keep, and frost prevention sensor. (for details,
refer to pages 72, 74 )

1-45
Models SRK288HENF-L, 328HENF-L, 408HENF-L

Indoor unit Outdoor unit

Power source
1Phase 220/240V 50Hz

Wireless
R-Amp
Display
Printed circuit board

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y/GN Yellow/Green

Meaning of marks

Symbol Parts name Symbol Parts name

Table of relay operations

Operation
Relay Control Cooling Heating Defrost
symbol part
52X4 20S × ×
52X5 FMO ×
52C CM
Notes (1) : denotes magentized relay × : denotes demagnetized relay
(2) Th1 is room temperature sensor. Th2 (the heat exchanger sensor) is the hot start, hot keep, and frost prevention sensor. (for details,
refer to pages 72, 74 )

1-46
Models SRK328HENF-L2, 408HENF-L2
Indoor unit Outdoor unit

Y/GN
Power source
1 Phase 220/240V 50Hz
T2 T1
Y/GN BK 1 1 BK
BK
BL WH 2 2
WH
BR Sh1 OR 3 3 BL
BK
RD 4 4 RD
BK 63H RD
Sh1
WH

BK
52C3 52C4 20S 23D
Tr 52X5
4 2
52C
2 52X6
OR

BK
6 3

BK BK
CNC CNB PC BK 23DH 2 51C

RD
F Th1

BK
250V 1
CNG
CNU

BL
3.15A 52X4 Th2 OR 7 C
BK
FMo 20S 52X5 CM
BR 1 CFI S R

RD
OR
WH 8

WH
5

BK
7

RD
RD 3 ZNR
CNE CND

FMI Wireless CFo 52X6

R-Amp Cc
CNW

WH
RD
Display
Printed circuit board
CNM

Sh2
LM 52C 52X4

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y/GN Yellow/Green

Meaning of marks
Symbol Parts name Symbol Parts name
Cc Capacitor for CM Th1,2 Thermistor
CFI Capacitor for FMI Tr Transformer
CFO Capacitor for FMo ZNR Varistor
CM Compressor motor 20S 4 way valve, coil
F Fuse 51C Motor protector for CM
FMI Fan motor (Indoor unit) 52C Magnetic conductor for CM
FMO Fan motor (Outdoor unit) 52X4,5,6 Auxiliary relay
LM Louver motor 63H High pressure switch
PC Photo coupler 23DH Defrost thermostat

Table of relay operations

Operation
Relay Control Cooling Heating Defrost
symbol part
52X4 20S
52X5
FMO
52X6
52C CM

Notes (1) ; denotes magnetized relay × : denotes demagnetized relay

(2) Th1 is room temperature thermistor. Th2 (the heat exchanger thermistor) is the hot start, hot keep, and frost prevention thermistor.
(for details, refer to pages 71,72,74)
(3) Preset values:
23DH (defroster stop thermostat): opens at over 14˚C
63H (overload protection high pressure switch during heating): closes at 1.86(19.0) / opens at 2.41(24.5) [MPa(kgf/cm2)]

1-47
Models SRK501HENF-L, 561HENF-L

Power source Indoor unit Outdoor unit

1 Phase 220/240V 50Hz

Y/GN
LB OR RD
BR 4 4
RD BL
3 3
Y/GN WH WH
2 2
BK BK RD
1 1
RD 63H RD RD
52C-4 G 52C-3 S 20S 23D
52C

BK
52C
TH1 52XA BK
PC

OR
WH
CNG
52X1 2 23
BL 52X1 TH2 52XB DH
5
Y F 6

RD
4 BL
FMI
WH
3 (250V
) BK

BK
3.15A 51C

BK
BK

RD
2
RD OR
1 FM0 20S 52XA CM
CNU

OR
CNH

Wireless

RD
R-Amp

OR
ZNR OR CF0 52XB Cc
CNE

WH
LM CNM Display

BL
Printed circuit board

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y Yellow
LB Light blue
Y/GN Yellow/Green

Meaning of marks
Symbol Parts name Symbol Parts name
CC Capacitor for CM Th1, 2 Thermistor
CFO Capacitor for FMO ZNR Varistor
CM Compressor motor 20S 4 way valve. coil
F Fuse 51C Motor protector for CM
FMI Fan motor (Indoor unit) 52C Magnetic contactor for CM
FMO Fan motor (Outdoor unit) 52XA, B, 1 Auxiliary relay
LM Louver motor 63H High pressure switch
PC Photo coupler 23DH Thermostat (Defrost)

Table of relay operations

Operation
Cooling Heating Defrost
Relay symbol Control part
52X1 20S × ×
52XA × ×
FMO
52XB × ×
52C CM

Notes (1) ; denotes magentized relay ×: denotes demagnetized relay

(2) Th1 is room temperature sensor. Th2 (the heat exchanger sensor) is the hot start, hot keep, and frost prevention sensor. (for details, refer to pages 71, 72, 74)

1-48
Models SRK50HA, 56HA
Power source Indoor unit Outdoor unit
1 Phase 220/230/240V 50Hz

Y/GN
BL OR RD
BR 4 4
RD BL
3 3
Y/GN WH WH
2 2
BK BK RD
1 1
RD 63H RD RD
52C-4 G 52C-3 S 20S 23D
52C

BK
52C
TH1 52XA BK
PC

OR
WH
CNG

52X1 23

BK
BL 52X1 TH2 52XB DH
5
Y F

RD
4 BL
( 250V
)

BK BK
WH
FMI 3 BK

BK
3.15A 51C

BK
BK

RD
2
RD OR
1 FM0 20S 52XA CM
CNU Wireless

OR
CNH

RD
WH WH
R-Amp
ZNR CF0 52XB Cc
Display
CNE

WH
LM CNM

BL
Back up sw
Printed circuit board

Color symbol Note(1) This figure shows SRK56HA. As for

BK Black SRK50HA, 51C differs as shown in the fig-
ure below.
BL Blue
BR Brown 51C
RD Red
OR Orange
WH White
Y Yellow
Y/GN Yellow/Green

Table of relay operations

Operation
Cooling Heating Defrost
Relay symbol Control part
52X1 20S × ×
52XA × ×
FMO
52XB × ×
52C CM

Notes (1) ; denotes magentized relay ×: denotes demagnetized relay

(2) Th1 is room temperature thermistor. Th2 (the heat exchanger thermistor) is the hot start, hot keep, and frost prevention thermistor.
(for details, refer to pages 19, 20, 22)
(3) Preset values :
23DH (defroster stop thermostat) : opens at over 14˚C
63H (overload protection high pressure switch during heating) : closes at 1.86(19.0 )/ opens at 2.41(24.5) [MPa(kgf/cm2)]
1-49
Model SRK408HENF-L3
Indoor unit Outdoor unit

Y/GN
Power source
1 Phase 220/240V 50Hz
T2 T1
Y/GN BK 1 1 BK
BK
BL WH 2 2
WH
BR Sh1 OR 3 3 BL
BK
RD 4 4 RD
BK 63H RD
Sh1
WH

BK
52C3 52C4 20S 23D
Tr 52X5
4 2
52C
2 52X6
OR

BK
6 3

BK BK
CNC CNB PC BK 23DH 2 51C

RD
F Th1

BK
1
CNG
250V
CNU

BL
3.15A 52X4 Th2 OR 7 C
BK
FMo 20S 52X5 CM
BR 1 CFI S R

RD
OR
WH 8

WH
5

BK
7

RD
RD 3 ZNR
CNE CND

FMI Wireless CFo 52X6

R-Amp Cc
CNW

WH
RD
Display
Printed circuit board
CNM

Sh2
LM 52C 52X4

Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y/GN Yellow/Green

Table of relay operations

Operation
Relay Control Cooling Heating Defrost
symbol part
52X4 20S
52X5
FMO
52X6
52C CM

Notes (1) ; denotes magnetized relay × : denotes demagnetized relay

(2) Th1 is room temperature thermistor. Th2 (the heat exchanger thermistor) is the hot start, hot keep, and frost prevention thermistor.
(for details, refer to pages 19,20,22)
(3) Preset values:
23DH (defroster stop thermostat): opens at over 14˚C
63H (overload protection high pressure switch during heating): closes at 2.02(20.5) / opens at 2.41(24.5) [MPa(kgf/cm2)]

1-50
Indoor unit Outdoor unit

Power source
1 phase 220/240V 50Hz
NK
Y/GN Y/GN RD RD
3 3
NF
LB WH WH WH
2 2 2 4
BR BK GY BK
1 1 1 3
(Power source F2(15A)
Signal line) BK
Tr 52C4 52C3 WH
Model SRK25GZ-L1

J
52C

Y/GN RE
DS
CNC CNB N
BR
F1
(250V 3.15A) V

CNC V WH
FM0
CNW
WH
CFI DS
FMI Y
RE C
WH CNB
20S
RD ZNR RD
CNU

Printed circuit board

SM CNM RL

52C
Th5

NK
CNE CNG U RD
Th6 CND
Color symbol Power V WH
Back up
BK Black transistor W BK
switch
Th7
BL Blue Printed circuit board
BR Brown Display
Wireless
LB Light blue R-Amp CM
Y Yellow Th1 Th2
RD Red
GY Gray
WH White
V Violet
Y/GN Yellow/Green

1-51
Indoor unit Outdoor unit

1-52
Power source
1 phase 220/240V 50Hz
NK
Y/GN Y/GN RD RD
3 3
NF
LB WH WH WH
2 2 2 4
BR BK GY BK
1 1 1 3
(Power source F2(20A)
Signal line) BK
Tr 52C4 52C3 WH
Model SRK35GZ-L1

J
52C

Y/GN RE
DS
CNC CNB N
BR
F1
(250V3.15A) V

CNC V WH
FM0
CNW
WH
CFI DS
FMI Y
RE C
WH CNB
20S
RD ZNR RD
CNU

Printed circuit board

SM CNM RL

52C
Th5

NK
CNE CND CNG U RD
Th6 CND
Color symbol Power V WH
Back up
BK Black transistor W BK
switch
Th7
BL Blue Printed circuit board
BR Brown Wireless
Display
R-Amp CM
LB Light blue
Y Yellow Th1 Th2
RD Red
GY Gray
WH White
V Violet
Y/GN Yellow/Green
Indoor unit Outdoor unit

Model

Y/GN RD 3 3 RD
Power source LB WH WH
1 phase 220/240V 50Hz 2 2
BR BK BK
1 1
SRK502Z-L

Fuse Printed circuit

52C-4 52C-3 S J board
250V 25A
52C
CNA 20S
CNB
52C
BL 5 GY BL
Y 4 F CNB
Printed circuit board
WH 3 250V
FMI (3.15A )
BK 2
CNE EEV
RD 1
CNU DS

ZNR WH

CNA OR RE
SM FMo
CNM
IC2
CNE CNH CNF CNG
Printed circuit
board RL

Colorsymbol
BK Black Wireless Th5
BL Blue R-Amp RD U P N
Back up
WH V Th6
BR Brown switch CM BK W
Display Th3 Th2 Th1
Y Yellow
Th7
RD Red
Power transistor
LB Light blue
WH White
Y/GN Yellow/Green

1-53
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
1.4.1 Table for operation control
Refering page
Functions Content
High efficiency, low input rotary –
compressor Low input rotary compressor with high efficiency is equipped.
All operation modes can be operated from distance place by the wire-
less remote control. And also liquid crystal is used to show all kinds to 68
Wireless remote control operation or, off, air flow switch, operation switch, timer switch, timer
set, temperature set, flap control.
Dry Defumidifies while keeping room temperature to the thermostat setting 73
level by M.C. thermostat.
ON TIMER ON timer setting for anytime during 24 (32, 40: 12) hours can be performed. 70
OFF timer setting for favourite time can be performed. Comfortable
Cooling and Dry operation to prevent catching cold in sleep and eco-
nomical operation can be performed, while raising room temperature
setting during 1 hour period in steps.
OFF TIMER While COOL & DRY: When the timer is set to OFF the temperature is 70
increased by 0.5ºC simultaneously, by 0.5ºC additionally every 30
minutes and by 1.5ºC in one hour.
While HEAT: When the timer is set to OFF the temperature is de-
creased by 1ºC simultaneously by 1ºC additionally every 30 minutes
Comfortability, Economical efficiency, Operational simplicity

and by 3ºC in one hour. (Heat Pump type only)

Room unit air volume can be automatically controlled step by step,
according to the difference between room temperature and setting tem-
Automatic fan control perature. 71
1. Shorten pull down time for cooling/heating operation
2. Low noise level operation can performed by proper air volume.
When heating is initiated, thermostat reset, or heating re-
HOT START sumed after defrosting, the indoor fan is automatically controlled
71
Pump type only] (in
3 Hot system [Heat

stop to set value in accordance with the temperature of the indoor air
heating operation)

heat exchanger to prevent the blowing out of cold air.

The thermostat temperature setting is automatically in-
HOT SPURT 72
Micro computer control

creased by 2ºC when heating is initiated to provide faster stabiliza-

tion of room temperature.
The indoor fan is stopped depending on the temp, of the indoor heat
exchanger to prevent the blowing-out of cold air when the 72
HOT KEEP
heating operation is stopped by thermostat or defrosting
operation is started.
Micro computer (MC)
controlled timely The change in the difference between the intake air temperature and the
heat exchanger temperature causes the frost and condensation removal 74
defrosting operation
(in heating) operation to start.
M. C. (Micro computer M. C thermostat improves on energy saving and comfort, by control- –
controlled) thermostat ling room temperature with high accuracy.
The flap can be automatically controlled by operating wireless remote
control.
• AUTO (Natural flow) : Flap operation is automatically controlled.
Remote control flap • Swing : This will swing the flap up and down. 66
• Memory flap : Once the flap position is set, the unit memo-
rizes the position and continues to operate at
the same position from the next time.
Comfort timer The room temperature is checked 60 minutes before the timer is at ON.
Depending on the temperature at that time, the operation starets 5 to 60 70
(Cooling & Heating)
minutes before the timer is at ON.
We are constantly trying to do better service to our customers by in-
stalling such judges that show abnormality of each function as follows:
• Abnormality of outdoor unit:
TIMER lamp flashing.
Self Diagnosis • Abnormality of indoor fan motor: 76
RUN lamp flashing.
Function

• Abnormality of room temperature thermistor:

RUN lamp flashing.
}
• Abnormality of heat exchanger thermistor: No lamp will flashing
RUN lamp flashing. when the unit is op-
erating

1-54
(1) Remote controller

S 50, 56 models HI POWER operation indicator

Indicators during HI POWER operation.
FAN SPEED indicator
Indicators the ¡ for the fan speed which has ECONOMY operation indicator
been set. Indicators during ECONOMY operation.

Operation switch over indicator

Indicators the ¡ for the operation which has
been set.
ON-TIMER • OFF-TIMER indicator
AIR FLOW indicator
Indicates selected flap mode.
FAN SPEED button CONT HI POWER ECONO
Each time the button is pushed, the ¡ AUTO
indicator is switched over in turn. HI
OPERATION MODE select button
MED
LO Each time the button is pushed, the ¡
indicator is switched over in turn.
ON OFF TIMER
HI POWER button
FAN SPEED ON/OFF MODE ON/OFF button
This button changes the HI POWER
operation. This button, when pressed, starts operation
and stops when repressed.
HI POWER TEMP AIR FLOW

AIR FLOW button

SET TEMPERATURE button ECONO ON TIMER OFF CANCEL This button changes the flap mode.
This button sets the room temperature.

ACL

ECONOMY button CANCEL button

This button changes the ECONOMY operation. The button releases the TIMER operation.

ON TIMER button
This button sets the ON timer times. OFF TIMER button
This button sets the OFF timer Times.

¡ Above figure shows all indications for the Reset switch

purpose of explanation, but practically only
the pertinent parts are indicated. Switch for resetting microcomputer.

Indoor unit indicator

Run (HOT KEEP) light (green)

¡ Illuminates during operation.
¡ Flashs at air flow stop due to the ‘HOT KEEP’

TIMER light (yellow)

Illuminates during TIMER operation.

RUN TIMER HI POWER ECONO

HI POWER light (green)

Illuminates during HI POWER operation.

ECONOMY light (orange)

Illuminates during ECONOMY operation.

1-55
(4) Operation control function by remote control switch
Remote control switch
S Models SRK 208, 258, 288, 328, 408 models

OPERATION MOOD select button

Each time the button is pushed, the •
indicator is switch over in turn.
CONT
AUTO ON/OFF button
HI
MED Press for starting operation, press again
for stopping.
LO
FAN SPEED button ON OFF TIMER
AIRFLOW button
Each time the button is pushed, the • FAN SPEED ON / OFF MODE
indicator is switched over in turn. This button changes the flap mode.
When pressed, this button changes
the mode in the following order:
TEMP AIR FLOW
or
TEMPERATURE button
(AUTO) (SWING)
This button sets the room temperature. SET TIMER TIMER no indication
(SWING STOPPED)
ACL

TIMER button
This button changes the selection of
SET TIMER button ON timer/OFF timer operation and
normal operation.
This button sets the ON timer and OFF
timer times.

RESET switch
Switch for resetting microcomputer.

• The above illustration shows all controls, but

in practice the relevant parts are shown.

OPERATION MODE Indicator

TEMPERATURE Indicator
Indicates selected operation with • lamp.
Indicator set temperature.
(Does not indicate temperature when CONT Heat pump: (AUTO) · (Cool) · (Heat) · (Dry)
Cooling only: (AUTO) · (Cool) · (Fan) · (Dry)
operation mode is on AUTO) AUTO
HI
MED
AIR FLOW Indicator
LO
ON OFF TIMER Shows selected flap mode.
FAN SPEED Indicator
Indicates set air flow with • lamp. TIMER Indicator

Unit indication section

RUN (HOT KEEP) light (green)

• Illuminates during operation.
•Blinks at air flow stop due to the `HOT
TIMER RUN KEEP´. (Heat pump type only)

TIMER light (yellow)

SRK208HENF
Illuminates during TIMER operation.

1-56
(3) Back-up Switch
When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this switch may be used to
turn the unit on and off.
(a) Operation
Push the switch 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 cooling, thermal dry or heating modes.
Function Room temperature
Fan speed Flap Timer switch
Operation mode setting
Cooling About 26ºC
Thermal dry About 25ºC Auto Natural flow Continuous
Heating About 25ºC
On operating in automatic operation mode by back-up switch, functions show in the above table are not altered, white, the other micro-
computer control functions remain effective.
• 40 model • 50, 56 models

ON/OFF

Back-up switch
Back-up switch
(4) AUTOMATIC operation
(a) Determination of operation mode
S50, 56 models
The blow operation of the indoor fan is carried out at the 1st speed for 20 seconds and the room temperature is checked to
determine the operation mode automatically. (When the unit is operated by the turn-on timer, the blow operation is not
carried out.)
Room temperature Room temp.<21˚C 21˚C <
= Room temp.<26˚C 26˚C <
= Room temp.

Operation Heat Pump type Heating Dry Cooling

mode Cooling only type Dry Cooling

S40 model
When starting operation after more than 1 hour since operation stops
(Operation stop button ON or ON-Timer), this system operates indoor fan with Lo for 20 seconds checks room temperature
and allowing decision of operating mode automatically.

Room temperature<21ºC 21ºC Room temperature<26ºC 26ºC Room temperature

Operation mode Heating Dry Cooling
Note (1) Operating Mode is not altered due to change of room temperature.
When intended to change operating mode, switch operation change over dial to the intended mode.

(b) The temperature is checked once every 30 minutes after operation start. When the judgment is different
from the previous operation mode, the operation mode is transferred. (50, 56 models only)

1-57
(c) When switching to automatic operation during “Heating” “Cooling” “Dry” or when restarting with in 30 minutes (40 : 1
hour) after stopping with automatic operation mode, the former operating mode is selected. (In this case, 20 seconds Lo
operation of indoor fan is not performed). When the previous mode is in “FAN”, operation mode is to be set by the above
mentioned chart.

(d) Established temperature (operate by the established temperature button on remote controller).
Wireless remote control signal (Indication)
-6 -5 -4 -3 -2 -1 ±0 +1 +2 +3 +4 +5 +6
Temperature

Cooling 20 21 22 23 24 25 26 27 28 29 30 31 32
setting

Thermal dry 19 20 21 22 23 24 25 26 27 28 29 30 31
Heating 19 20 21 22 23 24 25 26 27 28 29 30 31

(5) Comfort timer settings

Temperature is checked beginning 1 hour before the set time, and the power is turned on before the timer setting as necessary to
bring the temperature to the proper level by the set time.
Notes (1) At 5 minutes before the set time of
Operating start time (amount of time
Operation mode Room temperature thermistor (Th1) the turn-on timer, the operation is
previous to set time that operation begins)
started regardless of the tempera-
Under 5˚C 60 mins. ture of the room temperature
Heating Under 10˚C 30 mins. thermister.
(2) When the dry or blow operation is
Under 15˚C 15 mins. selected, this function is not acti-
Over 40˚C 60 mins. vated.
Cooling Over 35˚C 30 mins. (However, when the automatic dry
operation is selected, the function
Over 30˚C 15 mins. described in article (1) is operated.)

1-58
1.2.5 Selection chart
Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be
obtained in the following way.
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

43
Outdoor air D.B.
temperature

40
°C D.B.

35
30
25
20 24
15
14 16 18 20 22

Indoor air W.B. temperature °C W.B. ISO-T1 Standard Condition

Heating operation
Indoor air D.B.
temperature

27
°C D.B.

25
20 20
15
10
-10 -5 0 5 10 15
Outdoor air W.B. temperature °C W.B. ISO-T1 Standard Condition

(2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor
units.
Piping length [m] 7 10 15
Cooling 1.0 0.99 0.975
Heating 1.0 1.0 1.0

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

In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the
outdoor heat exchanger.
Air inlet temperature of
outdoor unit in ˚CWB -10 -9 -7 -5 -3 -1 1 3 5

Adjustment coefficient 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

Example : The net cooling capacity of the model SRK50HA with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C
and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 45000 ✕ 0.975 ✕ 1.0 = 4387 w

SRK50HA Length 15m Factor by air

temperatures

1-59
Additional refrigerant charge

When refrigerant piping exceeds 7(40 : 7.5) m conduct additional refrigerant charge after refrigerant sweeping.

S 50, 56 models
7m over 15m : Additional charge amount per meter = 20g/m
S 40 model
Max. 10m : Additional charge amount per meter = 20g/m
10m over 15m : Additional charge amount per meter = 30g/m
[Example : 50 model]
How much amount of additional charge for 15m piping?
(15 – 7)m × 20g/m = 160g 160g for additional charge

(4) Insulation of connecting portion To cover the connecting portion with

insulation materials, cut upper portion and
1) Cover the connection portion of the refrigerant piping with Vinyl tape then seal it with insulation materials.

the pipe cover and seal them.

If neglecting to do so, moisture occurs on the piping and
water will drip out.
2) Finishing and fixing Insulation Cover the exterior portion with
Refrigerant piping covering tape and shape the piping
a) Tie up the piping with wrapping tape, and shape it so Electrical wiring so it will match the contours of the
route that the piping to take. Also
Covering tape
that it conforms to which the pipe is attached. fix the wiring and pipings to the
Drain hose wall with clamps.
b) Fix them with clamps as right figure.
Tapping screw

1.5.5 Test run

(1) Conduct trial run after confirming that there is no gas leaks.
(2) When conducting trial run set the remote controller thermostat to continuous operation position. However when the power source
is cut off or when the unit’s operation switch is turned off or was turned to fan operation position, the unit will not go into operation
in order to protect the compressor.
(3) Insert in electric plug into the electric outlet and make sure that it is not loose.
(a) When there is something wrong with the electric outlet and if the insertion of the electric plug is insufficient, there may occur
a burn out.
(b) It is very important to be careful of above when pulgging in the unit to an already furnished electrical outlet.
(4) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms.
(5) Make sure that drain flows properly.
(6) Standard operation data
(a) Heat pump type (220/240V)

Item Model SRK408HENF-L3

Cooling –
High pressure MPa(kgf/cm2)
Heating 1.76 ~ 1.96 (18 ~ 20)
Cooling 0.39 ~0.49 (4.0 ~ 5.0)
Low pressure MPa(kgf/cm2)
Heating –
Temp. difference between suction Cooling 12 ~ 16
air and discharge air (˚C) Heating 18 ~ 22
Cooling 6.4/6.4
Running current (A)
Heating 6.5/6.5

1-60
(7) Standard operation data
(a) Heat pump type (220/240V)

Item Model SRK208HENF-L SRK288HENF-L SRK328HENF-L SRK408HENF-L

Cooling – – – –
High pressure (kgf/cm2G)
Heating 15 ~ 17 17 ~ 19 17 ~ 19 18 ~ 20
Cooling 4.5 ~ 5.5 4~5 4.5 ~ 5.5 4~5
Low pressure (kgf/cm2G)
Heating – – – –

Temp. difference between suction Cooling 14 ~ 16 11 ~ 15 12 ~ 16 12 ~ 16

air and discharge air (˚C) Heating 16 ~ 18 18 ~ 22 18 ~ 22 18 ~ 22
Cooling 3.4/3.6 4.5/4.6 6.9/6.9 6.4/6.4
Running current (A)
Heating 3.0/3.4 4.0/4.1 6.1/6.1 6.5/6.5

(220V/240V)

Note (1) The data are measured at following conditions

Ambient air temperature
Indoor side: Cooling ... 27°C DB, 19°C WB, Heating ... 20°C DB
Outdoor side: Cooling ... 35°C DB, 24°C WB, Heating ... 7°C DB, 6°C WB

(b) Cooling only type (220/240V)

Item Model SRK208CENF-L SRK258CENF-L SRK288CENF-L SRK328CENF-L SRK408HENF-L

High pressure (kgf/cm2G) – – – – –
Low pressure (kgf/cm2G) 5~6 5~6 4~5 5~6 4~5

Temp. difference between

suction air and discharge 11 ~13 12 ~ 16 13 ~ 17 12 ~ 16 13 ~ 17
air (˚C)

Running current (A) 2.5/2.6 3.3/3.4 4.1/4.2 4.3/4.4 6.4/6.4

(220/240V)

Note (1) The data are measured at following conditions

Ambient air temperature
Indoor side: 27°C DB, 19°C WB
Outdoor side: 35°C DB, 24°C WB

1-61
(220/230/240V)

Item Model SRK50HA SRK56HA

Cooling – –
High pressure MPa(kgf/cm2)
Heating 1.86 ~ 2.06 (19~21) 1.86 ~ 2.06 (19~21)
Cooling 0.39 ~ 0.49 (4 ~ 5) 0.34 ~0.44 (3.5 ~ 4.5)
Low pressure MPa(kgf/cm2)
Heating – –
Temp. difference between Cooling 12 ~ 16 12 ~ 16
suction air and discharge air (˚C) Heating 19 ~ 23 21 ~ 25
Cooling 8.4/8.0/7.7 9.7/9.3/8.9
Running current (A)
Heating 8.5/8.1/7.9 9.8/9.4/9.0

(b) Cooling only type (220/230/240V)

Item Model SRK50CA SRK56CA

2
High pressure MPa(kgf/cm ) – –
Low pressure MPa(kgf/cm2) 0.39 ~ 0.49 (4 ~ 5) 0.34 ~ 0.44 (3.5 ~ 4.5)
Temp. difference between
suction air and discharge air (˚C) 12 ~ 16 12 ~ 16

Running current (A) 8.4/8.0/7.7 9.7/9.3/8.9

Note (1) The data are measured at following conditions.
Ambient air temperature
Indoor side: Cooling ... 27°C DB, 19°C WB, Heating ... 20°C DB
Outdoor side: Cooling ... 35°C DB, 24°C WB, Heating ... 7°C DB, 6°C WB

1.5.6 Precautions for wireless remote controller installation and operation

(1) Wireless remote controller covers the following distances:
(a) When operating facing the air-conditioner:

Notes (1) The remote controller is correctly facing the sensing

element of the air conditioner when being manipulated.
5

(2) The typical coverage is indicated (in the left illustration).

m
or

It may be more or less depending on the installation.

(3) The coverage may be less or even nil. If the sensing

or element is exposed to strong light, such as direct

or les sunlight, illumination, etc., or dust is deposited on it or
Wireless remote s less
it is used behind a curtain, etc.
controller
or less
5 m or less

(b) When manipulating the remote controller mounted on a wall:

Make sure that it works normally (i.e., transmission/reception signal is
audible) before mounting.
Receiver

Remote control
available in this area.

1-62
(220/240V)

Item Model SRK501HENF-L SRK561HENF-L

Cooling – –
High pressure MPa(kgf/cm2)
Heating 1.67~1.86 (17 ~ 19) 1.76 ~ 1.96 (18 ~ 20)
Cooling 0.39 ~ 0.49 (4 ~ 5) 0.34 ~0.44 (3.5 ~ 4.5)
Low pressure MPa(kgf/cm2)
Heating – –
Temp. difference between Cooling 12 ~ 16 13 ~ 18
suction air and discharge air (˚C) Heating 19 ~ 23 21 ~ 25
Cooling 8.4/8.2 10.2/9.53
Running current (A)
Heating 8.5/8.3 10.5/9.95

(b) Cooling only type (220/240V)

Item Model SRK501CENF-L SRK561CENF-L

2
High pressure MPa(kgf/cm ) – –
Low pressure MPa(kgf/cm2) 0.39 ~ 0.49 (4 ~ 5) 0.34 ~ 0.44 (3.5 ~ 4.5)
Temp. difference between
suction air and discharge air (˚C) 12 ~ 16 13 ~ 18

Running current (A) 8.4/8.2 10.2/9.53

2.5.6 Precautions for wireless remote controller installation and operation

(1) Wireless remote controller covers the following distances:
(a) When operating facing the air-conditioner:

Notes (1) The remote controller is correctly facing the sensing

element of the air conditioner when being manipulated.
6

(2) The typical coverage is indicated (in the left

m
or

illustration). It may be more or less depending on the

installation.
ss

or (3) The coverage may be less or even nil. If the sensing

or les element is exposed to strong light, such as direct
Wireless remote s less
sunlight, illumination, etc., or dust is deposited on it or
controller
or less it is used behind a curtain, etc.
6 m or less

(b) When manipulating the remote controller mounted on a wall:

Make sure that it works normally (i.e., transmission/reception signal is
audible) before mounting.
Receiver

Remote control
available in this area.

1-63
1.6 MAINTENANCE DATA
1.6.1 Trouble shooting
(1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models]
All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it
is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct opera-
tions as mis-operations. It is also necessary to perform the following simple checks before conducting detailed checks or exchang-
ing printed circuit board.

Before exchanging Printed circuit board

Claim call from the user

Ascertain the nature of the claim. Unit did not cool, etc.

Ascertain the operation status. ¡ Is the power on?

¡ Is the thermostat setting correct?
(Not too high?)
Is this nonsense claim? YES ¡ Is the unit in a timer operation?
¡ Does user understand function?
No etc.
Operate the unit.
¡ Explain the function of the unit to user.
No
Does the trouble occur again?

YES No need for PCB change

Check further the status when the trouble occured
Temporarily turn off the power source and (such as the timer of occurence, power failures, thun-
turn it on again in about 1 min. and turn the der, use status of other electrical appliances, etc).
unit on again. Clarify the reason for the problem and explain it thor-
oughly to the user.

Does the trouble occur again? No

No need for PCB change
Microcomputer runaway due to power source
YES conditions is a possible cause.
Disconnect connectors and connect them
again.
Operate the unit again after confirming that the fuse
and the varistor equipped on PCB does not burn out.

No No need for PCB change

Does the trouble occur again?
The cause is defective connector contact.

YES
Carry out checks according to detailed
check process (See later page)

1-64
(2) Indication of Self Diagnosis (Indoor unit)

Connect of Defect Place of defect

RUN lamp is flashing. Abnormality of heat

¡ Disconnection of heat exchanger thermistor.
(1 Time flash.) exchanger thermistor.

TIMER lamp
is lights
RUN lamp is flashing. Abnormality of room ¡ Disconnection of room temperature
(2 Time flash.) temperature thermistor. thermistor.
continuously.

RUN lamp is flashing. Abnormality of indoor ¡ Fan motor is defective.

(6 Time flash.) fan motor. ¡ Printed circuit board is defective.

RUN lamp is ¡ Compressor is defective.

lights TIMER lamp is flashing. Abnormality of outdoor
(5 Time flash.) unit. ¡ Capacitor is defective.
continuously. ¡ Gas is short.

Note (1) When an abnormality is indicated on the outdoor unit for the cooling only model, check the fuse on the outdoor unit. If the fuse is burnt out,
replace it with new one.

(3) Troubleshooting
Abnormality of outdoor unit [Compressor malfunction of insufficient gas (refrigerant)]

No No
Does compressor operate? Is protective device normal? Replace protective device.

Yes
Yes
Is refrigerant circulation
volume normal?

No
Yes Is capacitor normal? Replace capacitor.

Is abnormality the same after No

gas charging? Insufficient gas.

Yes
Yes

Clogging of capillary tube. etc. Replace compressor.

Abnormality of indoor fan motor (Fan motor defective, printed circuit board defective)

Is the connector connection No

good? Repair the connector.

Yes

Is voltage being applied to the No The indoor circuit board

fan motor? is defective.

Yes

The fan motor is defective.

1-65
Anormality of thermistor Disconnection of thermistor and defective connection of connector

Chart for thermistor temperature

resistance characteristics
Is connection to connector No
good? Repair connector.
(Disconnection)
Yes

Resistance value
Is thermistor resistance No
Replace thermistor.
value normal?

Yes

(kΩ)
Replace PCB.

(Short circuit)

Temperature (°C)
(4) Trouble Diagnostic Procedures

Remove receptacle.
Unit malfunctions or Runaway of micro- Insert it after 3 min. No change. Replace PCB.
does not stop. computer and operate.

Normal operation. Microcomputer rarely

mis-starts even during
times or power supply
Indoor lamp of Check receptacle voltage. or power failure, but, it
indoor unit does not can sometimes occur
illuminate. during those times. If it
occurs, check the opera-
Check if PCB fuse is blown. Replace fuse. tion, when the result is
positive then proceed as
normal.

Check varistor. Replace varistor.

Check transformer secondary No

voltage Replace transformer

(40 model only)

Replace PCB.

Check it during cooling

Outdoor fan does not operation.
operate.
Yes Abnormal
Check voltage with fan Check capacitor. Replace capacitor.
connector.
Normal

No Replace fan motor.

(1)

Remove 52XΒ(52X6)red Operates

wires to check operation. Replace 23DH.

Does not operate.

(1)
Operates
Short-circuit 63H to check
operation. Replace 63H.

Does not operate.

(1)
Notes (1) It is not necessary to inspect
Measure voltage of 52XB No
(52X6) No.2 ,and terminal Replace 52XB(52X6). the dedicated cooling unit.
block 2. (2) Value in ( ) indicates
40models

1-66
(5) Trouble shooting chart for the room temperature thermistor (Th1), heat exchanger thermistor (Th2) and defrost thermostat (23DH)
Function
Unit Thermistor Operation
Short circuit Broken connection
Continuous Cooling operation Cooling will not operate
¡ Cannot be turned ON/OFF by thermostat ¡ FMI : continuous operation
Cooling
Room temperature ¡ When FMI is on. “AUTO” is continuously ¡ CM,FMo: stopped
thermistor (1) (Th1) Hi
except for “continuous” Heating will not operate Continuous heating operation.
thermal setting. (CM, FMo, FMI all stopped) ¡ Cannot be turned ON/OFF by thermostat
Heating ¡ When FMI is on. “AUTO” is continuously Hi
Indoor unit

Cooling will operate

¡ Heat exchanger frost preventer begins to operate
Cooling Cooling will not operate. ¡ Cools alternately for 10 minutes, stopping for 3
minutes.
Heat exchanger
thermistor (Th2) Heating will not operate Heating will not operate normally
¡ Heating overload protect begins to operate ¡ CM, FMo are ON
Heating ¡ When FM is on, “AUTO’” is continuously ¡ FMI is OFF
Hi ¡ Hot keep lamp illuminated
¡ CM, FMo are stopped
Cooling will not operate (blown breaker)
¡ CM, FMI are ON
Cooling ¡ FMo is OFF No effect
Outdoor unit

Defrost thermostat
(23DH) Heating will not operate normally Heating will operate.
(The defrosting will operate normally, but ¡ Unable to defros(2)
Heating 23DH reset is not possible. De frosts for 10 ¡ Will not operate for very long when outside air
minutes) temperature is low

Notes
(1) When the room temperature thermistor (Th1) will not operate normally. Cooling or heating operation may be run continuously by putting the thermostat setting on
“CONTINUOUS”
(2) When switching to the defrost cycle, 23DH opens (broken connection), the machanism resets to heating, and defrosting will not operate.

(6) How to make sure of remote controller Note (1) How to check the remote controller
(1)
Is remote NO Remote controller S40 model
controller
normal? defects
(a) Press the reset switch of remote controller.
(b) If the salmost normal if entire display of remote control-
YES
ler is shown after indication.
Again pushing
operating switch

Operating the YES Abnormal is not

unit? fount

NO
S50,56 models

Does operating
(a) Press the reset switch of remote controller.
backup switch
(b) If the salmost normal if entire display of remote
controller is shown after indication.

Operating the unit

YES
Is control unit CONT HIPOWER ECONO
normal

Replace the
display

Operating the unit Is it normal

NO
Remote
controller defects
1-67
1.6.3 Power supply remote operation
When the remote part on indoor unit PCB is modified, the air conditioner is turned ON-OFF by power supply ON-OFF operation
without using remote control switch.
After the power supply remote operation, the operation contents can be modified by the remote controller.
(1) Operation contents
(a) Heat pump type
Operation change AUTO

Power supply OFF

Power supply ON

Air conditioner
COOL: 26˚C
Start operation
3-minute timer

Set temperature DRY: 25˚C

operation

STOP
HEAT: 25˚C
Air capacity change AUTO
Flap AUTO
Timer Continuous

(b) Cooling only type

Operation change AUTO

Power supply OFF

Power supply ON

Air conditioner
Start operation
3-minute timer

COOL: 26˚C
Set temperature
operation

DRY: 25˚C

STOP
Air capacity change AUTO
Flap AUTO
Timer Continuous

(2) Modification method

S40 model
Solder the high-speed switching diode (manufacturer: Matsushita, Manufacture type No.: MA165) to “Remote” part on the
PCB in the direction as shown in the diagram below.

1-68

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