Mitsubishi Heavy Industries SRK25ZXA-S User manual

TECHNICAL MANUAL
INVERTER WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK25ZXA-S / SRC25ZXA-S
SRK25ZXA-SB / SRC25ZXA-S
SRK25ZXA-SS / SRC25ZXA-S
SRK25ZXA-SR / SRC25ZXA-S
SRK35ZXA-S / SRC35ZXA-S
SRK35ZXA-SB / SRC35ZXA-S
SRK35ZXA-SS / SRC35ZXA-S
SRK35ZXA-SR / SRC35ZXA-S
-ANUAL.Ogs32+4

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'14 • SRK-T-170
CONTENTS
1. SPECIFICATIONS ........................................................................................ 3
(2) Outdoor units ....................................................................................... 12
..................................................... 19
(3) Wireless remote control ...................................................................... 13
......................................................................... 11
(1) Indoor units .......................................................................................... 11
2. EXTERIOR DIMENSIONS
3. ELECTRICAL WIRING .............................................................................. 14
(1) Indoor units .......................................................................................... 14
4. NOISE LEVEL ............................................................................................ 16
(2) Outdoor units ....................................................................................... 15
6. RANGE OF USAGE & LIMITATIONS
................................................................................... 21
7. CAPACITY TABLES
5. PIPING SYSTEM ...................................................................................... 18
.................................................................................. 22
8. APPLICATION DATA
9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............... 30
4IMEROPERATION .................................................................................. 33
/PERATIONCONTROLFUNCTIONBYREMOTECONTROL
&LAPANDLOUVERCONTROL ........................................................................ 32
%CONOMYOPERATION ............................................................................. 32
(IGHPOWEROPERATION .......................................................................... 31
......................................................................... 31!UTORESTARTFUNCTION
5NIT/./&&BUTTON ........................................................................... 31
...................................... 30
/UTLINEOFHEATINGOPERATION ................................................................ 33
/UTLINEOFAUTOMATICOPERATION ........................................................... 36
/UTLINEOFCOOLINGOPERATION ............................................................... 35
0ROTECTIONCONTROLFUNCTION ................................................................... 37
/UTLINEOFDRYDEHUMIDIFYINGOPERATION ............................................. 35
..................... 45
............................................................................... 44
4ROUBLESHOOTINGPROCEDURE)FTHEAIRCONDITIONERRUNS
4ROUBLESHOOTINGPROCEDURE
)FTHEAIRCONDITIONERDOESNOTRUNATALL
........ 44
#AUTIONS ............................................................................................. 44
)TEMSTOCHECKBEFORETROUBLESHOOTING ................................................. 44
3ELFDIAGNOSISTABLE ............................................................................. 46
3ERVICEMODE4ROUBLEMODEACCESSFUNCTION ................................... 47
10. MAINTENANCE DATA

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'14 • SRK-T-170
(10) How to make sure of wireless remote control ...................................... 61
(11) Outdoor unit inspection points .............................................................. 62
(8)
Phenomenon observed after shortcircuit, wire breakage on sensor 
#HECKINGTHEINDOORELECTRICALEQUIPMENT ........................................... 60
عHow to read the model name
Example: SRK 25 Z
Series code
Inverter type
Product capacity (Cooling capacity)
Model name SRK : Wall mounted type
SRC : Outdoor unit
XA-S/SB/SS/SR
(7) Inspection procedures corresponding to detail of trouble .................... 55

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'14 • SRK-T-170
Model SRK25ZXA-S
Model
Item
SRK25ZXA-S
Indoor unit SRK25ZXA-S Outdoor unit SRC25ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.5 (0.9 (Min.) - 4.0 (Max.))
Nominal heating capacity (range) kW 3.5 (1.1 (Min.) - 4.3 (Max.))
Power
consumption
Cooling
kW
0.56 (0.21 - 1.4)
Heating 0.91 (0.28 - 1.37)
Max power consumption 1.63
Running
current
Cooling
A
2.9 / 2.8 / 2.7 (220 / 230 / 240V)
Heating 4.4 / 4.2 / 4.0 (220 / 230 / 240V)
Inrush current, max current 2.9 / 2.8 / 2.7 (220 / 230 / 240 V) Max. 9
Power factor Cooling %88
Heating 94
EER Cooling 4.46
COP Heating 3.85
Sound power level Cooling
dB(A)
53 54
Heating 53 59
Sound pressure level Cooling Hi: 37 Me: 29 Lo: 22 43
Heating Hi: 37 Me: 31 Lo: 25 48
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance White Stucco white
Net weight kg 10.5 34.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.75 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.150 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 & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 7.9 Me: 6.1 Lo: 4.1 30.0
Heating Hi: 8.0 Me: 7.9 Lo: 4.1 28.7
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ9.52 (3/8")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.47 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 3.9 / 3.8 / 3.6 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 10 m connecting piping.
(purging is not required even for the short piping. )
If the piping length is longer, when it is 10 to 15 m, add 20 g refrigerant per meter.
The pipe length is 7.5m.
1. SPECIFICATIONS

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'14 • SRK-T-170
Model SRK25ZXA-SB
Model
Item
SRK25ZXA-SB
Indoor unit SRK25ZXA-SB Outdoor unit SRC25ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.5 (0.9 (Min.) - 4.0 (Max.))
Nominal heating capacity (range) kW 3.5 (1.1 (Min.) - 4.3 (Max.))
Power
consumption
Cooling
kW
0.56 (0.21 - 1.4)
Heating 0.91 (0.28 - 1.37)
Max power consumption 1.63
Running
current
Cooling
A
2.9 / 2.8 / 2.7 (220 / 230 / 240V)
Heating 4.4 / 4.2 / 4.0 (220 / 230 / 240V)
Inrush current, max current 2.9 / 2.8 / 2.7 (220 / 230 / 240 V) Max. 9
Power factor Cooling %88
Heating 94
EER Cooling 4.46
COP Heating 3.85
Sound power level Cooling
dB(A)
53 54
Heating 53 59
Sound pressure level Cooling Hi: 37 Me: 29 Lo: 22 43
Heating Hi: 37 Me: 31 Lo: 25 48
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Black Stucco white
Net weight kg 10.5 34.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.75 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.150 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 & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 7.9 Me: 6.1 Lo: 4.1 30.0
Heating Hi: 8.0 Me: 7.9 Lo: 4.1 28.7
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ9.52 (3/8")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.47 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 3.9 / 3.8 / 3.6 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 10 m connecting piping.
(purging is not required even for the short piping. )
If the piping length is longer, when it is 10 to 15 m, add 20 g refrigerant per meter.
The pipe length is 7.5m.

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'14 • SRK-T-170
Model SRK25ZXA-SS
Model
Item
SRK25ZXA-SS
Indoor unit SRK25ZXA-SS Outdoor unit SRC25ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.5 (0.9 (Min.) - 4.0 (Max.))
Nominal heating capacity (range) kW 3.5 (1.1 (Min.) - 4.3 (Max.))
Power
consumption
Cooling
kW
0.56 (0.21 - 1.4)
Heating 0.91 (0.28 - 1.37)
Max power consumption 1.63
Running
current
Cooling
A
2.9 / 2.8 / 2.7 (220 / 230 / 240V)
Heating 4.4 / 4.2 / 4.0 (220 / 230 / 240V)
Inrush current, max current 2.9 / 2.8 / 2.7 (220 / 230 / 240 V) Max. 9
Power factor Cooling %88
Heating 94
EER Cooling 4.46
COP Heating 3.85
Sound power level Cooling
dB(A)
53 54
Heating 53 59
Sound pressure level Cooling Hi: 37 Me: 29 Lo: 22 43
Heating Hi: 37 Me: 31 Lo: 25 48
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Silver Stucco white
Net weight kg 10.5 34.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.75 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.150 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 & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 7.9 Me: 6.1 Lo: 4.1 30.0
Heating Hi: 8.0 Me: 7.9 Lo: 4.1 28.7
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ9.52 (3/8")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.47 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 3.9 / 3.8 / 3.6 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 10 m connecting piping.
(purging is not required even for the short piping. )
If the piping length is longer, when it is 10 to 15 m, add 20 g refrigerant per meter.
The pipe length is 7.5m.

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6
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'14 • SRK-T-170
Model SRK25ZXA-SR
Model
Item
SRK25ZXA-SR
Indoor unit SRK25ZXA-SR Outdoor unit SRC25ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.5 (0.9 (Min.) - 4.0 (Max.))
Nominal heating capacity (range) kW 3.5 (1.1 (Min.) - 4.3 (Max.))
Power
consumption
Cooling
kW
0.56 (0.21 - 1.4)
Heating 0.91 (0.28 - 1.37)
Max power consumption 1.63
Running
current
Cooling
A
2.9 / 2.8 / 2.7 (220 / 230 / 240V)
Heating 4.4 / 4.2 / 4.0 (220 / 230 / 240V)
Inrush current, max current 2.9 / 2.8 / 2.7 (220 / 230 / 240 V) Max. 9
Power factor Cooling %88
Heating 94
EER Cooling 4.46
COP Heating 3.85
Sound power level Cooling
dB(A)
53 54
Heating 53 59
Sound pressure level Cooling Hi: 37 Me: 29 Lo: 22 43
Heating Hi: 37 Me: 31 Lo: 25 48
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Red Stucco white
Net weight kg 10.5 34.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.75 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.150 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 & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 7.9 Me: 6.1 Lo: 4.1 30.0
Heating Hi: 8.0 Me: 7.9 Lo: 4.1 28.7
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ9.52 (3/8")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.47 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 3.9 / 3.8 / 3.6 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 10 m connecting piping.
(purging is not required even for the short piping. )
If the piping length is longer, when it is 10 to 15 m, add 20 g refrigerant per meter.
The pipe length is 7.5m.

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7
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'14 • SRK-T-170
Model
Item
SRK35ZXA-S
Indoor unit SRK35ZXA-S Outdoor unit SRC35ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 3.5 (0.9 (Min.) - 4.6 (Max.))
Nominal heating capacity (range) kW 4.5 (1.1 (Min.) - 5.0 (Max.))
Power
consumption
Cooling
kW
0.860 (0.21 - 1.45)
Heating 1.20 (0.24 - 1.50)
Max power consumption 1.63
Running
current
Cooling
A
4.2 / 4.0 / 3.9 (220 / 230 / 240V)
Heating 5.7 / 5.5 / 5.2 (220 / 230 / 240V)
Inrush current, max current 4.2 / 4.0 / 3.9 (220 / 230 / 240 V) Max. 9
Power factor Cooling %93
Heating 95
EER Cooling 4.07
COP Heating 3.75
Sound power level Cooling
dB(A)
60 60
Heating 60 61
Sound pressure level Cooling Hi: 43 Me: 34 Lo: 26 49
Heating Hi: 43 Me: 36 Lo: 29 50
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Fine snow Stucco white
Net weight kg 10.5 36.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.90 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.21 in outdoor unit (incl. the amount for the piping of 15m)
Heat exchanger Louver fins & inner grooved tubing Plate M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 10.8 Me: 7.7 Lo: 6.3 30.2
Heating Hi: 11.1 Me: 8.3 Lo: 5.2 29.0
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ12.7 (1/2")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.41 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Model SRK35ZXA-S
Note (1) The data are measured at the following conditions.
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(purging is not required even for the short piping. )
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
The pipe length is 7.5m.

-
8
-
'14 • SRK-T-170
Model SRK35ZXA-SB
Model
Item
SRK35ZXA-SB
Indoor unit SRK35ZXA-SB Outdoor unit SRC35ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 3.5 (0.9 (Min.) - 4.6 (Max.))
Nominal heating capacity (range) kW 4.5 (1.1 (Min.) - 5.0 (Max.))
Power
consumption
Cooling
kW
0.860 (0.21 - 1.45)
Heating 1.20 (0.24 - 1.50)
Max power consumption 1.63
Running
current
Cooling
A
4.2 / 4.0 / 3.9 (220 / 230 / 240V)
Heating 5.7 / 5.5 / 5.2 (220 / 230 / 240V)
Inrush current, max current 4.2 / 4.0 / 3.9 (220 / 230 / 240 V) Max. 9
Power factor Cooling %93
Heating 95
EER Cooling 4.07
COP Heating 3.75
Sound power level Cooling
dB(A)
60 60
Heating 60 61
Sound pressure level Cooling Hi: 43 Me: 34 Lo: 26 49
Heating Hi: 43 Me: 36 Lo: 29 50
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Black Stucco white
Net weight kg 10.5 36.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.90 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.21 in outdoor unit (incl. the amount for the piping of 15m)
Heat exchanger Louver fins & inner grooved tubing Plate M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 10.8 Me: 7.7 Lo: 6.3 30.2
Heating Hi: 11.1 Me: 8.3 Lo: 5.2 29.0
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ12.7 (1/2")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.41 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(purging is not required even for the short piping. )
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
The pipe length is 7.5m.

-
9
-
'14 • SRK-T-170
Model SRK35ZXA-SS
Model
Item
SRK35ZXA-SS
Indoor unit SRK35ZXA-SS Outdoor unit SRC35ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 3.5 (0.9 (Min.) - 4.6 (Max.))
Nominal heating capacity (range) kW 4.5 (1.1 (Min.) - 5.0 (Max.))
Power
consumption
Cooling
kW
0.860 (0.21 - 1.45)
Heating 1.20 (0.24 - 1.50)
Max power consumption 1.63
Running
current
Cooling
A
4.2 / 4.0 / 3.9 (220 / 230 / 240V)
Heating 5.7 / 5.5 / 5.2 (220 / 230 / 240V)
Inrush current, max current 4.2 / 4.0 / 3.9 (220 / 230 / 240 V) Max. 9
Power factor Cooling %93
Heating 95
EER Cooling 4.07
COP Heating 3.75
Sound power level Cooling
dB(A)
60 60
Heating 60 61
Sound pressure level Cooling Hi: 43 Me: 34 Lo: 26 49
Heating Hi: 43 Me: 36 Lo: 29 50
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Silver Stucco white
Net weight kg 10.5 36.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.90 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.21 in outdoor unit (incl. the amount for the piping of 15m)
Heat exchanger Louver fins & inner grooved tubing Plate M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 10.8 Me: 7.7 Lo: 6.3 30.2
Heating Hi: 11.1 Me: 8.3 Lo: 5.2 29.0
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ12.7 (1/2")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.41 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(purging is not required even for the short piping. )
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
The pipe length is 7.5m.

-
10
-
'14 • SRK-T-170
Model SRK35ZXA-SR
Model
Item
SRK35ZXA-SR
Indoor unit SRK35ZXA-SR Outdoor unit SRC35ZXA-S
Power source Single Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 3.5 (0.9 (Min.) - 4.6 (Max.))
Nominal heating capacity (range) kW 4.5 (1.1 (Min.) - 5.0 (Max.))
Power
consumption
Cooling
kW
0.860 (0.21 - 1.45)
Heating 1.20 (0.24 - 1.50)
Max power consumption 1.63
Running
current
Cooling
A
4.2 / 4.0 / 3.9 (220 / 230 / 240V)
Heating 5.7 / 5.5 / 5.2 (220 / 230 / 240V)
Inrush current, max current 4.2 / 4.0 / 3.9 (220 / 230 / 240 V) Max. 9
Power factor Cooling %93
Heating 95
EER Cooling 4.07
COP Heating 3.75
Sound power level Cooling
dB(A)
60 60
Heating 60 61
Sound pressure level Cooling Hi: 43 Me: 34 Lo: 26 49
Heating Hi: 43 Me: 36 Lo: 29 50
Silent mode sound pressure level — —
Exterior dimensions (Height x Width x Depth) mm 298 x 798 x 231 540 x 780 (+62) x 290
Exterior appearance Red Stucco white
Net weight kg 10.5 36.5
Compressor type & Q'ty — RM-B5077MDE2 (Rotary type) x 1
Compressor motor (Starting method) kW — 0.90 (Inverter driven)
Refrigerant oil (Amount, type) — 0.3 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.21 in outdoor unit (incl. the amount for the piping of 15m)
Heat exchanger Louver fins & inner grooved tubing Plate M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 24 x1 (Direct drive)
Air flow Cooling m3/min Hi: 10.8 Me: 7.7 Lo: 6.3 30.2
Heating Hi: 11.1 Me: 8.3 Lo: 5.2 29.0
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 — —
Operation
control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN, TIMER, HI POWER, ECONO, CLEAN, Temperature: White
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection (High pressure control), Cooling overload protection
Installation
data
Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ12.7 (1/2")
Connecting method Flare connection Flare connection
Attached length of piping m Liquid line : 0.52 / Gas line : 0.41 —
Insulation for piping Necessary (Both sides), independent
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 (VP 16) Holes φ20 x 2 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 4.9 / 4.7 / 4.5 (220 / 230 / 240 V)
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable) / Terminal block (Screw fixing type)
IP number IPX0 IPX4
Standard accessories Mounting kit
Option parts —
Note (1) The data are measured at the following conditions.
(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.
(5) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(purging is not required even for the short piping. )
item
operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
The pipe length is 7.5m.

-
11
-
'14 • SRK-T-170
2. EXTERIOR DIMENSIONS (1) Indoor units
Models SRK25ZXA-S / SB / SS / SR, 35ZXA-S / SB / SS / SR
Unit:mm
Wireless remote control
Hole on wall for right rear piping
Hole on wall for left rear piping
Gas piping
Outlet for wiring
Drain hose
Liquid piping
F
E
C
D
B
Symbol
A
Ǿ65
VP16
Ǿ6.351㧛4"Flare
Content
Ǿ65
Outlet for piping㧔on both side㧕
G
Model 25 Ǿ9.523㧛8"Flare
Model 35 Ǿ12.71㧛2"Flare
Note㧔1㧕The model name label is attached
˴˴ ˴on the underside of the indoor unit.
298
C
100 100
798
525
668 6565
135 135
8.5
5
285
ABED

-
12
-
'14 • SRK-T-170
35-Ǿ12.71㧛2"Flare
25-Ǿ9.523㧛8"
Content
Symbol
C Pipe㧛cable draw-out hole
D
E Anchor bolt hole
Drain discharge hole
B
AService valve connectiongas side
M104places
Ǿ205places
Service valve connectionliquid sideǾ6.351㧛4"Flare
Unit:mm
L2
L3
L4
L1
100
100
250
Open
㧵ΤΥ Φ
Open
250
80
280
280
Open
80
100
Examples of
Dimensions
installation
180
Open
80
Open
Notes
1It must not be surrounded by walls on the four sides.
2The unit must be fixed with anchor bolts. An anchor bolt must not
protrude more than 15mm.
3Where the unit is subject to strong winds, lay it in such
a direction that the blower outlet faces perpendicularly
to the dominant wind direction.
4Leave 1m or more space above the unit.
5A wall in front of the blower outlet must not exceed the units height.
6The model name label is attached on the right side of the unit.
Intake
Intake
Outtake L1
L2
L3
L4
()
service
space
Ǿ
Terminal block
A
BC
DE
(2) Outdoor units
Models SRC25ZXA-S, 35ZXA-S

-
13
-
'14 • SRK-T-170
(3) Wireless remote control
Unit:mm

-
14
-
'14 • SRK-T-170
Blue
BlackBK
BK
BK
Red
BL
BL
RD
RD
RD
WhiteWH
WH
WH
Yellow㧛GreenY㧛G
Y㧛G
ColorMark
Heat exch. sensor
Fan motor
Room temp. sensor
Flap motor
Diode stackDS
FuseF
ConnectorCNE
FM
Louver motor
LM
Terminal blockTB
Description
Item
VaristorVA
SM
ThI
Th2
YellowYE
YE
Humidity sensor
HD
CNF
CNG
CNM
CNU
CNY
CNR
LM SM FM
DS
Th1 Th2
3. ELECTRICAL WIRING (1) Indoor units
Models SRK25ZXA-S/SB/SS/SR, 35ZXA-S/SB/SS/SR

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15
-
'14 • SRK-T-170
(2) Outdoor units
Models SRC25ZXA-S, 35ZXA-S
㪲㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㪴
Color
RD
Mark
OrangeOR
Yellow㧛GreenY㧛G
BlackBK
YellowYE
WhiteWH
Red
DescriptionItem
Connector
Electric expansion valve㧔coil㧕
EEV
Fan motor
FMo
Reactor
R
Terminal block
TB
Compressor motor
CM
Solenoid coil for 4 way valve
20S
Heat exchanger sensor㧔outdoor unit㧕
TH1
Outdoor air temp. sensor
TH2
TH3 Discharge pipe temp. sensor
CN20S
CNEEV
CNFAN
CNTH
25
Model
Power cable, indoor-outdoor connecting wires
٨The specifications shown in the above table are for units without heaters. For units with heaters, refer
to the installation instructions or the construction instructions of the indoor unit.
٨Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen
along the regulations in each country.
٨The 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 internal cabling regulations. Adapt it to the regulation
in effect in each country.
35 92.032
1.5mm2x4 1.5
3
1
2N
220-240V 50Hz
POWER SOURCE
TO INDOOR UNIT
POWER WIRES
SIGNAL WIRE
MAX running current Power cable size
㧔mm2㧕
㧔A㧕
Power cable length
㧔m㧕
indoor-outdoor
wire size x number
Earth wire size
㧔mm2㧕
TB

-
16
-
'14 • SRK-T-170
Sound Pressure Level (dB)
(Standard 2 10-5 Pa)
Mid Octave Band Frequency(Hz)
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
10
20
30
40
50
60
70
N70
N60
N50
N40
N30
N20
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band Frequency(Hz)
10
20
30
40
50
60
70
Sound Pressure Level (dB)
(Standard 2 10-5 Pa)
N70
N60
N50
N40
N30
N20
(OutdoorUnit)
Model SRC25ZXA-S
Noise
Level
Cooling 43dB(A)
Heating 48 dB(A)
(IndoorUnit)
Model SRK25ZXA-S/SB/SS/SR
Noise
Level
Cooling 37 dB(A)
Heating 37 dB(A) × ...... Cooling Heating
× ...... Cooling Heating
ConditionISO-T1,JIS C 9612
٨Mike position
0.8m
1m
Unit Mike position
(Center & Low points)
4. NOISE LEVEL
Model SRK25ZXA-S/SB/SS/SR
●
Mikeposition: at highest noise level in positionas mentioned below
Distancefromfront side 1m

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17
-
'14 • SRK-T-170
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band Frequency(Hz)
10
20
30
40
50
60
70
Sound Pressure Level (dB)
(Standard 2 10-5 Pa)
N70
N60
N50
N40
N30
N20
(OutdoorUnit)
Model SRC35ZXA-S
Noise
Level
Cooling 49 dB(A)
Heating 50 dB(A) × ...... Cooling Heating
(IndoorUnit)
Model SRK35ZXA-S/SB/SS/SR
Noise
Level
Cooling 43dB(A)
Heating 43dB(A) × ...... Cooling Heating
ConditionISO-T1,JIS C 9612
٨Mike position
0.8m
1m
Unit Mike position
(Center & Low points)
Model SRK35ZXA-S/SB/SS/SR
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band Frequency(Hz)
10
20
30
40
50
60
70
Sound Pressure Level (dB)
(Standard 2 10-5 Pa)
N70
N60
N50
N40
N30
N20
●
Mikeposition: at highest noise level in positionas mentioned below
Distancefromfront side 1m

-
18
-
'14 • SRK-T-170
5. PIPINGSYSTEM
Models SRK25ZXA-S/SB/SS/SR, 35ZXA-S/SB/SS/SR
pG vG
mG
vG
OnP
jGG
jGG
nG
Y\G `U\Y
Z\G XYU^
hG

p  U

h 
 
o

mG
sG
]UZ\
vG
OsP
m
j 
 
o  o 
l
 
k 

hG

+ 

v  U

y 

j

n 

k 

-
19
-
'14 • SRK-T-170
6. RANGE OF USAGE & LIMITATIONS
SRK25ZXA-S/SB/SS/SR, 35ZXA-S/SB/SS/SR
Net capacity = Capacity shown on specification Correction factors as follows.
(1) Coefficient of cooling and heating capacity in relation to temperatures
18
0
15
0.6
0.7
0.8
0.9
1.0
1.2
1.1
1.3
0
-5
-10
-15
24
26
20
25
30
35
40
46
15
20
25
30
Outdoor air W.B. temperature °C W.B.
-10 -5 0 5 10 15
.
Cooling operation
Outdoor air D.B.
temperature
°C D. B.
Coefficient of cooling
&
Heating capacity in relation to temperature
Heating operation
Indoor air D.B.
temperature
°C D. B.
ISO-T1 Standard Condition
Depends on installed situation
ISO-T1 Standard Condition
2220181614
Indoor air W.B. temperature °C W.B
Applicable range
Cooling
Heating