Mitsubishi Heavy Industries SRK20ZMXA-S User manual

RESIDENTIAL AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST
WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK20ZMXA-S
SRK25ZMXA-S
SRK35ZMXA-S
SRK50ZMXA-S
SRK60ZMXA-S
Manual No.'14 • SRK-T-155

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'14 • SRK-T-155
TECHNICAL MANUAL

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'10 • SRK-T-105
CONTENTS
1. SPECIFICATIONS ........................................................................................ 4
(2) Outdoor units ....................................................................................... 10
..................................................... 23
(3) Remote control ..................................................................................... 12
......................................................................... 9
(1) Indoor units .......................................................................................... 9
2. EXTERIOR DIMENSIONS
3. ELECTRICAL WIRING .............................................................................. 14
(1) Indoor units .......................................................................................... 14
4. NOISE LEVEL ............................................................................................ 17
(2) Outdoor units ....................................................................................... 15
6. RANGE OF USAGE & LIMITATIONS
................................................................................... 25
7. CAPACITY TABLES
5. PIPING SYSTEM ...................................................................................... 22
.................................................................................. 27
8. APPLICATION DATA
9. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............... 47
(10) Timer operation .................................................................................. 52
(9) 3D auto operation ........................................................................... 51
............................... 48
(1) Operation control function by wireless remote control
(8) Flap and louver control ...................................................................... 50
(5) Selection of the annual cooling function .............................................. 49
(4) Installing two air conditioners in the same room
......................................................................... 48(3) Auto restart function
(2) Unit ON/OFF button ........................................................................... 48
....................... 47
(11) Silent mode .................................................................................... 52
(13) Installation location setting ........................................................... 52
(12) Night setback .................................................................................. 52
(14) Outline of heating operation ................................................................ 53
(16) Outline of dry (dehumidifying) opration .............................................. 55
(15) Outline of cooling operation ............................................................... 54
(1) Installation of indoor unit ...................................................................... 27
(2) Installation of outdoor unit .................................................................. 31
(7) Economy operation .............................................................................. 49
(6) High power operation ........................................................................... 49
(17) Outline of automatic operation ........................................................... 55
(18) Protective control function ................................................................... 56
(19) DRED ................................................................................................... 64

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(10) How to make sure of wireless remote control ...................................... 83
(12) Outdoor unit inspection points .............................................................. 84
(11) Inspection procedure for blown fuse on the indoor and outdoor PCB .... 83
(8) Phenomenon observed after shortcircuit, wire breakage on sensor ......... 81
(9) Checking the indoor electrical equipment ........................................... 81
■How to read the model name
Example: SRK 20 Z
Series code
Inverter type
Product capacity (Cooling capacity : 2.0kW)
Model name SRK : Wall mounted type
SRC : Outdoor unit
MXA-S
........................................................................................... 87
11. OPTION PARTS
.............................................................. 87
..................................................................... 93
(1) Wired remote control (RC-E5)
(2) Interface kit (SC-BIKN-E)
(3) Super link E board (SC-ADNA-E) .......................................................... 97
(6) Service mode (Trouble mode access function) ................................... 68
(7) Inspection procedures corresponding to detail of trouble .................... 76
..................... 66
(4) Troubleshooting procedure (If the air conditioner runs)
(3) Troubleshooting procedure (If the air conditioner does not run at all)
........ 65
(2) Items to check before troubleshooting ................................................. 65
(5) Self-diagnosis table ............................................................................. 67
............................................................................... 65
(1) Cautions ............................................................................................. 65
10. MAINTENANCE DATA

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1. SPECIFICATIONS
Model
Item
SRK20ZMXA-S
Indoor unit SRK20ZMXA-S Outdoor unit SRC20ZMXA-S
Power source 1 Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.0 ( 0.9 (Min.) - 3.1 (Max.))
Nominal heating capacity (range) kW 2.5 ( 0.9 (Min.) - 4.3 (Max.))
Power
consumption
Cooling
kW
0.35 ( 0.19 - 0.70 )
Heating 0.45 ( 0.23 - 1.00 )
Max power consumption 1.65
Running
current
Cooling
A
1.9 / 1.8 / 1.7 (220/ 230/ 240 V)
Heating 2.4 / 2.3 / 2.2 (220/ 230/ 240 V)
Inrush current, max current 2.4 / 2.3 / 2.2 (220/ 230/ 240 V) Max. 8
Power factor Cooling %85
Heating 86
EER Cooling 5.71
COP Heating 5.56
Sound power level Cooling
dB(A)
53 60
Heating 54 59
Sound pressure level Cooling Hi: 39 Me: 30 Lo: 24 ULo: 21 47
Heating Hi: 38 Me: 33 Lo: 25 ULo: 21 47
Silent mode sound pressure level — Cooling:40 / Heating:42
Exterior dimensions (Height x Width x Depth) mm 309 x 890 x 220 595 x 780(+62) x 290
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Stucco white
( 4.2Y 7.5/1.1 ) near equivalent
Net weight kg 13.5 35
Compressor type & Q'ty — RM-B5077MDE1( Rotary type ) x 1
Compressor motor (Starting method) kW — 0.75 ( Inverter driven )
Refrigerant oil (Amount, type) — 0.35 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.2 in outdoor unit (incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & 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: 11.5 Me: 8.0 Lo: 6.3 ULo: 5.0 29.5
Heating Hi: 12.0 Me: 9.5 Lo: 7.0 ULo: 6.3 27.0
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2 —
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: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green, ECONO: Blue
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 : 0.55 / Gas line : 0.49 —
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 2.4 / 2.3 / 2.2 (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, Clean filter (Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1)
Option parts Interface kit (SC-BIKN-E)
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) This air-conditioner is compliant with DRED (AS/NZS 4755.3.1), and can operate with DRM1, 2 or 3, and is equipped with a terminal
block for DRED.
The pipe length is 7.5m.
C
RWA000Z252

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'14 • SRK-T-155
Model
Item
SRK25ZMXA-S
Indoor unit SRK25ZMXA-S Outdoor unit SRC25ZMXA-S
Power source 1 Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 2.55 ( 0.9 (Min.) - 3.2 (Max.))
Nominal heating capacity (range) kW 3.13 ( 0.9 (Min.) - 4.7 (Max.))
Power
consumption
Cooling
kW
0.49 ( 0.19 - 0.82 )
Heating 0.595 ( 0.23 - 1.12 )
Max power consumption 1.65
Running
current
Cooling
A
2.5 / 2.4 / 2.3 (220/ 230/ 240 V)
Heating 3.1 / 2.9 / 2.8 (220/ 230/ 240 V)
Inrush current, max current 3.1 / 2.9 / 2.8 (220/ 230/ 240 V) Max. 8
Power factor Cooling %90
Heating 88
EER Cooling 5.20
COP Heating 5.26
Sound power level Cooling
dB(A)
55 60
Heating 58 60
Sound pressure level Cooling Hi: 41 Me: 31 Lo: 25 ULo: 22 47
Heating Hi: 41 Me: 34 Lo: 27 ULo: 21 47
Silent mode sound pressure level — Cooling:41 / Heating:42
Exterior dimensions (Height x Width x Depth) mm 309 x 890 x 220 595 x 780(+62) x 290
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Stucco white
( 4.2Y 7.5/1.1 ) near equivalent
Net weight kg 13.5 35
Compressor type & Q'ty — RM-B5077MDE1( Rotary type ) x 1
Compressor motor (Starting method) kW — 0.75 ( Inverter driven )
Refrigerant oil (Amount, type) — 0.35 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.2 in outdoor unit (incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & 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: 12.5 Me: 9.0 Lo: 6.3 ULo: 5.0 29.5
Heating Hi: 13.0 Me: 10.0 Lo: 7.5 ULo: 6.3 27.0
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2 —
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: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green, ECONO: Blue
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 : 0.55 / Gas line : 0.49 —
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 3.1 / 2.9 / 2.8 (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, Clean filter (Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1)
Option parts Interface kit (SC-BIKN-E)
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) This air-conditioner is compliant with DRED (AS/NZS 4755.3.1), and can operate with DRM1, 2 or 3, and is equipped with a terminal
block for DRED.
The pipe length is 7.5m.
C
RWA000Z252

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6
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'14 • SRK-T-155
Model
Item
SRK35ZMXA-S
Indoor unit SRK35ZMXA-S Outdoor unit SRC35ZMXA-S
Power source 1 Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 3.5 ( 0.9 (Min.) - 4.1 (Max.))
Nominal heating capacity (range) kW 4.3 ( 0.9 (Min.) - 5.1 (Max.))
Power
consumption
Cooling
kW
0.845 ( 0.19 - 1.01 )
Heating 0.960 ( 0.23 - 1.35 )
Max power consumption 1.65
Running
current
Cooling
A
4.0 / 3.8 / 3.6 (220/ 230/ 240 V)
Heating 4.6 / 4.4 / 4.2 (220/ 230/ 240 V)
Inrush current, max current 4.6 / 4.4 / 4.2 (220/ 230/ 240 V) Max. 8
Power factor Cooling %97
Heating 95
EER Cooling 4.14
COP Heating 4.48
Sound power level Cooling
dB(A)
58 63
Heating 59 62
Sound pressure level Cooling Hi: 43 Me: 33 Lo: 25 ULo: 22 50
Heating Hi: 42 Me: 35 Lo: 27 ULo: 22 50
Silent mode sound pressure level — Cooling:45 / Heating:43
Exterior dimensions (Height x Width x Depth) mm 309 x 890 x 220 595 x 780(+62) x 290
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Stucco white
( 4.2Y 7.5/1.1 ) near equivalent
Net weight kg 13.5 35
Compressor type & Q'ty — RM-B5077MDE1( Rotary type ) x 1
Compressor motor (Starting method) kW — 0.90 ( Inverter driven )
Refrigerant oil (Amount, type) — 0.35 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.2 in outdoor unit (incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & 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: 13.5 Me: 9.5 Lo: 6.5 ULo: 5.0 32.5
Heating Hi: 14.0 Me: 11.0 Lo: 8.0 ULo: 6.5 29.5
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2 —
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: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green, ECONO: Blue
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 : 0.55 / Gas line : 0.49 —
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 4.6 / 4.4 / 4.2 (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, Clean filter (Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1)
Option parts Interface kit (SC-BIKN-E)
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) This air-conditioner is compliant with DRED (AS/NZS 4755.3.1), and can operate with DRM1, 2 or 3, and is equipped with a terminal
block for DRED.
The pipe length is 7.5m.
C
RWA000Z252

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7
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'14 • SRK-T-155
Model
Item
SRK50ZMXA-S
Indoor unit SRK50ZMXA-S Outdoor unit SRC50ZMXA-S
Power source 1 Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 5.0 ( 1.1 (Min.) - 5.8 (Max.))
Nominal heating capacity (range) kW 6.0 ( 0.6 (Min.) - 7.7 (Max.))
Power
consumption
Cooling
kW
1.30 ( 0.2 - 1.80 )
Heating 1.36 ( 0.2 - 2.43 )
Max power consumption 2.9
Running
current
Cooling
A
6.0 / 5.7 / 5.5 (220/ 230/ 240 V)
Heating 6.2 / 6.0 / 5.7 (220/ 230/ 240 V)
Inrush current, max current 6.2 / 6.0 / 5.7 (220/ 230/ 240 V) Max. 15
Power factor Cooling %99
Heating 99
EER Cooling 3.85
COP Heating 4.41
Sound power level Cooling
dB(A)
60 63
Heating 64 63
Sound pressure level Cooling Hi: 47 Me: 40 Lo: 27 ULo: 25 54
Heating Hi: 48 Me: 40 Lo: 33 ULo: 26 50
Silent mode sound pressure level — Cooling:45 / Heating:45
Exterior dimensions (Height x Width x Depth) mm 309 x 890 x 220 640 x 800(+71) x 290
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Stucco white
( 4.2Y 7.5/1.1 ) near equivalent
Net weight kg 13.5 45.5
Compressor type & Q'ty — RMT5113MCE2( Twin Rotary type ) x 1
Compressor motor (Starting method) kW — 1.50 ( Inverter driven )
Refrigerant oil (Amount, type) — 0.45 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.5 in outdoor unit (incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 34 x1 (Direct drive)
Air flow Cooling m3/min Hi: 13.5 Me: 11.0 Lo: 8.0 ULo: 7.0 39.0
Heating Hi: 17.0 Me: 14.5 Lo: 10.5 ULo: 8.0 33.0
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2 —
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: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green, ECONO: Blue
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 : 0.55 / Gas line : 0.49 —
Insulation for piping Necessary (Both sides), independent
Refrigerant line (one way) length m Max. 30
Vertical height diff. between O.U. and I.U. m Max. 20 (Outdoor unit is higher) / Max. 20 (Outdoor unit is lower)
Drain hose Hose connectable ( VP 16 ) Holes φ20 x 5 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 6.2 / 6.0 / 5.7 (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, Clean filter (Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1)
Option parts Interface kit (SC-BIKN-E)
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) This air-conditioner is compliant with DRED (AS/NZS 4755.3.1), and can operate with DRM1, 2 or 3, and is equipped with a terminal
block for DRED.
The pipe length is 7.5m.
C
RWA000Z252

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8
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'14 • SRK-T-155
Model
Item
SRK60ZMXA-S
Indoor unit SRK60ZMXA-S Outdoor unit SRC60ZMXA-S
Power source 1 Phase, 220 - 240V, 50Hz
Operation
data
Nominal cooling capacity (range) kW 6.0 ( 1.1 (Min.) - 6.8 (Max.))
Nominal heating capacity (range) kW 6.8 ( 0.6 (Min.) - 8.2 (Max.))
Power
consumption
Cooling
kW
1.86 ( 0.2 - 2.50 )
Heating 1.67 ( 0.2 - 2.70 )
Max power consumption 2.9
Running
current
Cooling
A
8.5 / 8.2 / 7.8 (220/ 230/ 240 V)
Heating 7.7 / 7.3 / 7.0 (220/ 230/ 240 V)
Inrush current, max current 8.5 / 8.2 / 7.8 (220/ 230/ 240 V) Max. 15
Power factor Cooling %99
Heating 99
EER Cooling 3.23
COP Heating 4.07
Sound power level Cooling
dB(A)
62 64
Heating 64 64
Sound pressure level Cooling Hi: 51 Me: 41 Lo: 29 ULo: 25 54
Heating Hi: 48 Me: 41 Lo: 34 ULo: 27 54
Silent mode sound pressure level — Cooling:45 / Heating:45
Exterior dimensions (Height x Width x Depth) mm 309 x 890 x 220 640 x 800(+71) x 290
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Stucco white
( 4.2Y 7.5/1.1 ) near equivalent
Net weight kg 13.5 45.5
Compressor type & Q'ty — RMT5113MCE2( Twin Rotary type ) x 1
Compressor motor (Starting method) kW — 1.50 ( Inverter driven )
Refrigerant oil (Amount, type) — 0.45 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 1.5 in outdoor unit (incl. the amount for the piping of 15m )
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Fan motor (Starting method) W 30 x1 (Direct drive) 34 x1 (Direct drive)
Air flow Cooling m3/min Hi: 14.5 Me: 12.5 Lo: 8.5 ULo: 7.0 41.5
Heating Hi: 17.5 Me: 15.0 Lo: 11.0 ULo: 8.5 39.0
Available external static pressure Pa 0 0
Outside air intake Not possible —
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2 —
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: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green, ECONO: Blue
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 : 0.55 / Gas line : 0.49 —
Insulation for piping Necessary (Both sides), independent
Refrigerant line (one way) length m Max. 30
Vertical height diff. between O.U. and I.U. m Max. 20 (Outdoor unit is higher) / Max. 20 (Outdoor unit is lower)
Drain hose Hose connectable ( VP 16 ) Holes φ20 x 5 pcs
Drain pump, max lift height mm — —
Recommended breaker size A 16
L.R.A. (Locked rotor ampere) A 8.6 / 8.2 / 7.9 (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, Clean filter (Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1)
Option parts Interface kit (SC-BIKN-E)
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) This air-conditioner is compliant with DRED (AS/NZS 4755.3.1), and can operate with DRM1, 2 or 3, and is equipped with a terminal
block for DRED.
The pipe length is 7.5m.
C
RWA000Z252

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9
-
'14 • SRK-T-155
2. EXTERIOR DIMENSIONS
(1) Indoor units
Models SRK20ZMXA-S, 25ZMXA-S, 35ZMXA-S, 50ZMXA-S, 60ZMXA-S
RKY000Z056
26
59.9
46.5
61.5
881.9
20.959.9
46.5
61.5
890
309
Outlet for down piping
(Refer to the above view)
Installation plate
(Service space)
120
220
50
48.9222.5
650 450
35 35
48
58
DA
E
B
120 100
220
Unit
491.1
520.8
559.1
C
Space for installation and service when viewing from the front
48
5.7 295.4
15 (Service space)
7.9
70
(Service space)
(Service space)
Terminal block
9 61.5
46.5
61.5
F
3220
G
Hole on wall for right rear piping Hole on wall for left rear piping Outlet for wiring Drain hose
F
E
C D
VP16 (φ65) (φ65)
Outlet for piping (on both side)
G
Symbol Content
Gas pipingA Liquid pipingB φ6.35（1／4"）（Flare）
φ12.7（1／2"）（Flare）
Model 50,60
φ9.52（3／8"）（Flare）
Model 20,25,35
Wireless remote control Wired - remote control
（Option）
120 19
Unit:mm
Notes（1）The model name label is attached
on the underside of the panel.
（2）It takes the interface kit（SC-BIKN-E）
to connect the wired remote control.

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10
-
'14 • SRK-T-155
(2) Outdoor units
Models SRC20ZMXA-S, 25ZMXA-S, 35ZMXA-S
RCV000Z018
63.469.4
290
390.6 50.6
12
E
D
111.6
390.6
510
780
158.4
14.8
17.9
61.9
312.5 24.3
351.6
φ
9.52（3／8"）（Flare）
Content
CPipe／cable draw-out hole
EAnchor bolt hole
Drain discharge hole
Symbol
B AService valve connection（gas side）
M10×4places
Service valve connection（liquid side）φ
6.35（1／4"）（Flare）
Dφ
20×2places
595
15.8
97.7 42.5
138.4
B
Terminal block
Terminal block
（For DRED AS／NZS 4755）
33.5
C
40°
40°
A
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 lower right corner of the front panel.
Service space
L2
Intake
Intake L3
Outlet L1
L4
Minimum installation space
Examples of
installation
Dimensions
L2 L3 L4 L1
Ｉ ＩＩ ＩＩＩ ＩＶ
100 100 250
Open 280
Open
80 75 Open
250
80
280 180
Open
80
Open
Unit:mm

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11
-
'14 • SRK-T-155
RCT000Z008
Models SRC50ZMXA-S, 60ZMXA-S
290
90.6
43.5
35.6
38.6
327.3
520.6 161
50.6
12 E
89
327.3
510
800
201
71.2
17.9
14.8 312.5
351.6
24.3
640
12.4
93 42.5
Terminal block
Terminal block
（For DRED AS／NZS 4755）
148.4 33.5 C
40°
40°
B
A
L2
Intake
Outlet
Intake L3 L4
L1
Service space
Examples of
Dimensions
installation
Ｉ ＩＩ ＩＩＩ ＩＶ
100 100 250
Open
Open
250
80
280 280
Open
80 75
180
Open
80
Open
Unit:mm
Minimum installation space
Content
CPipe／cable draw-out hole D
EAnchor bolt hole
Drain discharge hole
Symbol
B AService valve connection（gas side）
M10×4places
Service valve connection（liquid side）
φ12.7（1／2" （ ） Flare）
φ
20×5places
φ6.35（1／4" （ ） Flare）
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.
D

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12
-
'14 • SRK-T-155
(3) Remote control
Unit : mm
60 26
167
(a) Wireless remote control

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13
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'14 • SRK-T-155
(b) Wired remote control (option parts)
Interface kit (SC-BIKN-E) is required to use the wired remote control.
PJZ000Z295
TEMP ON/OFF
48
□120
L C D
Wall surface
Wiring
Electrical box
（Not included）
19
Wiring specifications
Exposed mounting
23
46
11.5 11
Remote
control
outline
120
45
83.5
42
120
Remote control installation dimensions
Wiring oulet
Installation hole
12×7 Slot hole
9.5×5 Slot hole （4places）
（1）Installation screw for remote control
M4 Screw (2 pieces)
44
(1) If the prolongation is over 100m, change to the size below.
But, wiring in the remote control case should be under 0.5mm2. Change the wire size outside of
the case according to wire connecting. Waterproof treatment is necessary at the wire connecting
section. Be careful about contact failure.
Length Wiring thickness
100 to 200m 0.5mm2×2 cores
0.75mm2×2 cores
1.25mm2×2 cores
2.0mm2×2 cores
Under 300m
Under 400m
Under 600m
Upper part
Lower part
Lower case
Sheath
Upper cace
Board
Wiring
Upper
Lower
X Y
Sheath
Upper cace
Board
Wiring
Upper
Lower
YX
Tighten the screws after
cutting off the thin part of
screw mounting part.
Embedded mounting
Pearl WhiteExterior appearance
(Munsell color) (N8.5) near equivalent
The peeling-off length of sheath
The peeling-off length
of sheath
In case of pulling out from
upper left
In case of pulling out
from upper left
In case of pulling out
from upper left
X wiring : 170mm
Y wiring : 190mm
Pulling out from center
X wiring : 215mm
Y wiring : 195mm
Pulling out from upper left
In case of pulling out from center
In case of pulling out
from center
In case of pulling out
from center
Wiring outlet
Cut off the upper thin part of remote control lower case with a nipper or knife,
and grind burrs with a file etc.
0.3mm2×2 cores.
X, Y Terminal block
Attach M3 screw
with washer
Unit:mm

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14
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'14 • SRK-T-155
3. ELECTRICAL WIRING
(1) Indoor units
Models SRK20ZMXA-S, 25ZMXA-S, 35ZMXA-S, 50ZMXA-S, 60ZMXA-S
RWA000Z256
WIRELESS RECEIVER
BACK-UP SW
DISPLAY 12
Th1 t
t t
Th2
1
Th2
2
Th3
CNG
CNE
BOARD
CIRCUIT PRINTED
CNX1 CNX2
DS
G
CNY
CNF CNS
Y／G
S／N
WH
JRD
L
BK
HEAT
EXCHANGER CNU
VaU
250V
3.15A
F
1 3 4 5 6
5 5 5 5 5 5
5
5 5
LM
1
LM
2
SM
LS
IM
RD WH BK BL Y
FM
I
Power source 1 phase 220 - 240 V 50Hz
TO OUTDOOR UNIT
1
2／N
3
T
HEAT
EXCHANGER
POWER WIRES SIGNAL WIRE
1
2／N
3
Connector
DescriptionItem
CNE-CNY
Heat exch. sensor Humidity sensor（50,60 only）
Fan motor Room temp. sensor Flap motor
Th1 Th21,2
Th3
Diode stack
DS
Fuse
F FMI
Terminal blockT Louver motor
LM1,2
SM
Limit switchLS Inlet motor
IM
VaristorVa
Color Marks
Blue BlackBK Red
BL RD
WhiteWH Yellow／GreenY／G YellowY ColorMark

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15
-
'14 • SRK-T-155
(2) Outdoor units
Models SRC20ZMXA-S, 25ZMXA-S, 35ZMXA-S
RWC000Z271
TO INDOOR UNIT
SIGNAL WIRE
POWER WIRES
3
1
2N
POWER SOURCE
〜220ｰ240V50Hz／〜220V60Hz
TB1
TERMINAL
BLOCK
L
N
1 3 2
（BK）
250V 15A
（Y／G）
（BK）
（WH）
R.IN
（Y／G） （Y／G）
（RD）
C-2 G1 G2
S.IN
FILTER NOISE
TB2
TERMINAL
BLOCK
D1 D2 D3
C
（YE）
（RD）
（BL）
（BK）
（WH）
CNPOWER
CNDRED
（BK）
CNDRM
（Y／G）
PWB ASSY
PWB2
CNDRM
4
20S
2
CN20S
F1
250V 3.15A
（OR）
（Y）
L
T1 T2
CIRCUIT
POWER
SWITCHING
F4
250V 10A
CIRCUIT
PAM
PWB ASSY PWB1
TRANSISTOR
POWER
250V 20A
F2
（BK） （WH） （RD）
W
V
U
W
V
U
N
P
M
3〜
CM
CNFAN
FMo
M
F3 250V 1A
CNTH CNEEV
2 2 2
TH2 TH3 TH4 EEV
M
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. Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country. 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.
Power cable, indoor-outdoor connecting wires
MAX running current
（A）
20
Model
25 35
9（ZMA） 8（ZMXA）
Power cable size
（mm2）
2.0 32
Power cable length
（m）
indoor-outdoor
wire size x number
Earth wire size
（mm
2
）
1.51.5mm2x 3
DescriptionItem
Connector Electric expansion valve（coil）
EEV
Fan motorFMo ReactorL Terminal blockTB1,2 Compressor motor
CM
Solenoid valve for 4 way valve20S Heat exchanger sensor（outdoor unit）
TH2
Outdoor air temp.sensorTH3
TH4 Discharge pipe temp.sensor CN20S CNTH CNEEV CNFAN
Color
RD Mark
Orange
OR
Yellow／Green
Y／G
Black
BK
Yellow
Y
WhiteWH Red
• • •

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16
-
'14 • SRK-T-155
Models SRC50ZMXA-S, 60ZMXA-S
RWC000Z268
CN20S
POWER SOURCE
〜220-240V 50Hz
TB1
TERMINAL
BLOCK
N L（BK）
FUSE
250V 20A
（BK）
（WH）
（BR）
（Y／G）
PWB ASSY（SUB）
（WH）
TB2
BLOCK
TERMINAL
1
3
2N
（Y／G）
TO INDOOR UNIT
POWER WIRES
SIGNAL WIRE
3
1
TB3
BLOCK
TERMINAL
D1 D3 D2
C（BK）
（WH）
（YE）
（RD）
（BL）
（BK）
（Y／G）
20S
CNDRM
CNPOWER
CNDRED
PWB ASSY（DRED）
TH2 TH4TH3
2 2 2
4
CNDRM CNTH
（RD）C-2
S
R
IN
IN
OUT
R
F10
（Y／G）
G1 CN20S
（Y／G）
R
O O
S
S-1
CNMAIN
G3
（BK）
（WH） （WH）
（BK）
4
S R S-2
CNSUB
F1
250V 3.15A
CIRCUIT
SWITCHING
POWER
250V 20A ACTIVE
FILTER
UNIT
PWB ASSY（MAIN）
F8
250V 20A
F2
TRANSISTOR
POWER
P NW
V U
W V U
2N
R
（OR）
（YE）
T2
T1
F3 250V 1A
CNFAN
（BK）
（WH） （RD）
MS
3〜
CM
M
FMo
Power cable, indoor-outdoor connecting wires
Model
MAX running current Power cable size
（mm
2
）（A）
Power cable length
（m）
indoor-outdoor
wire size x number
Earth wire size
（mm
2
）
15 2.0 18 1.5mm
2
x 3 1.5
50 60
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.
Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country. 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.
Description
Item
Connector
CNEEV〜CN20S
Electric expansion valve（coil）
EEV
Fan motor
FMo
Reactor
R
Terminal blockTB1,2,3 Compressor motor
CM
Solenoid valve for 4 way valve
20S
Heat exchanger sensor（outdoor unit）
TH2
Outdoor air temp.sensor
TH3 TH4 Discharge pipe temp.sensor
Mark BK
BR OR RD WH YE BL Y／G Yellow／Green
Blue Yellow White Red Orange Brown Boack Color
• • •

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17
-
'14 • SRK-T-155
(Indoor Unit)
Model SRK20ZMXA-S
Noise
Level
Cooling 39 dB(A)
Heating 38 dB(A)
× ...... Cooling, Heating
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band frequency (Hz)
Sound Pressure Level (dB)
(standard 2×10-5 P a )
10
20
30
40
50
60
70
N50
N30
N40
N60
N70
N20
(Outdoor Unit)
Model SRC20ZMXA-S
Noise
Level
Cooling 47 dB(A)
Heating 47 dB(A)
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band frequency (Hz)
Sound Pressure Level (dB)
(standard 2×10-5 P a )
10
20
30
40
50
60
70
N50
N40
N60
N70
N20
N30
× ...... Cooling, Heating
Condition ISO-T1,JIS C 9612
Mike position: at highest noise level in position as mentioned below
Distance from front side 1m
Mike position
0.8m
1m
Unit Mike position
(Center & Low points)
Mike position: at highest noise level in position as mentioned below
Distance from front side 1m
Mike position
0.8m
1m
Unit Mike position
(Center & Low points)
4. NOISE LEVEL
Model SRK20ZMXA-S

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18
-
'14 • SRK-T-155
(Indoor Unit)
Model SRK25ZMXA-S
Noise
Level
Cooling 41 dB(A)
Heating 41 dB(A)
× ...... Cooling, Heating
Model SRK25ZMXA-S
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band frequency (Hz)
Sound Pressure Level (dB)
(standard 2×10-5 P a )
10
20
30
40
50
60
70
N50
N30
N40
N60
N70
N20
(Outdoor Unit)
Model SRC25ZMXA-S
Noise
Level
Cooling 47 dB(A)
Heating 47 dB(A)
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Mid Octave Band frequency (Hz)
Sound Pressure Level (dB)
(standard 2×10-5 P a )
10
20
30
40
50
60
70
N50
N40
N60
N70
N20
N30
× ...... Cooling, Heating
Condition ISO-T1,JIS C 9612
Mike position: at highest noise level in position as mentioned below
Distance from front side 1m
Mike position
0.8m
1m
Unit Mike position
(Center & Low points)
Mike position: at highest noise level in position as mentioned below
Distance from front side 1m
Mike position
0.8m
1m
Unit Mike position
(Center & Low points)