Mitsubishi Heavy Industries SRK25GZ-L1 User manual

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2000 AIR CONDITIONING & HEAT PUMP
MACHINERY HANDBOOK

WALL MOUNTED TYPE ROOM AIR-CONDITIONER
(INVERTER TYPE)
(Split system, Air to air heat pump type)
WALL MOUNTED TYPE ROOM AIR-CONDITIONER
(Split system, Air to air heat pump type)
WALL MOUNTED TYPE ROOM AIR-CONDITIONER
(Split system, Air cooled cooling only type)
INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER
(Air to air heat pump type)
INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER
(Air to air heat pump type)
INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER
(Split system, Air cooled cooling only type)
WALL MOUNTED MULTI-TYPE ROOM AIR-CONDITIONER
(Split system, Air cooled cooling only type)
CEILING RECESSED TYPE PACKAGED AIR-CONDITIONER
(Split system, Air to air heat pump type)
CEILING RECESSED TYPE PACKAGED AIR-CONDITIONER
(Split system, Air cooled cooling only type)
CEILING SUSPENSION TYPE PACKAGED AIR-CONDITIONER
(Split system, Air to air heat pump type)
CEILING SUSPENSION TYPE PACKAGED AIR-CONDITIONER
(Split system, Air cooled cooling only type)
WALL MOUNTED TYPE PACKAGED AIR-CONDITIONER
(Split system, Air to air heat pump type)
WALL MOUNTED TYPE PACKAGED AIR-CONDITIONER
(Split system, Air cooled cooling only type)
CEILING RECESSED TYPE CASSETTERIA MODELS
(Split system, Air to air heat pump type)
HIGH STATIC PRESSURE DUCT TYPE
PACKAGED AIR-CONDITIONER
(Spilt system, Air to air heat pump type)
HIGH STATIC PRESSURE DUCT TYPE
PACKAGED AIR-CONDITIONER
(Split system, Air cooled cooling only type)
FLOOR STANDING TYPE (CONSOLE TYPE)
PACKAGED AIR-CONDITIONER
(Split system, Air to air heat pump type)
MULTI-TYPE PACKAGED AIR-CONDITIONER
(Split system, Air to air heat pump type)
INVERTER DRIVEN MULTl-INDOOR UNIT
CLIMATE CONTROL SYSTEM
(Split system, Air to air heat pump type)
INVERTER DRIVEN MULTl-INDOOR UNIT
HEAT RECOVERY CLIMATE CONTROL SYSTEM
(Simultaneous heating & cooling 3 pipe system)
[SRK-GZ]
[SRK-H]
[SRK-C]
[SCM-C]
[FDT(N)-H]
[FDT(N)-C]
[FDEN-H]
[FDEN-C]
[FDKN-H]
[FDKN-C]
[FDR-H]
[FDU-H]
[FDU-C]
[FDFL-H]
[V MULTI]
[FDC-HKX]
[FDC-HKXR]
1
51
93
103
179
221
233
265
363
405
441
469
503
527
579
627
655
677
723
935
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5
6
7
8
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10
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18
19
20
TABLE OF CONTENTS
[
SCM-HG
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4 room
[
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2 room
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SCM-CG
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2 room
TOP
TOP

1
SRK-GZ
1. WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
Split system, Air to air
heat pump type
SRK25GZ-L1, SRK35GZ-L1, SRK502Z-L
()
1
SRK-GZ

2
SRK-GZ
CONTENTS
1.1 GENERAL INFORMATION........................................................................ 3
1.1.1 Specific features ................................................................................. 3
1.1.2 How to read the model name............................................................. 3
1.2 SELECTION DATA .................................................................................... 4
1.2.1 Specifications ..................................................................................... 4
1.2.2 Range of usage & limitations ............................................................ 7
1.2.3 Exterior dimensions ........................................................................... 8
1.2.4 Piping system ..................................................................................... 11
1.3 ELECTRICAL DATA .................................................................................. 12
1.3.1 Electrical wiring .................................................................................. 12
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............. 16
1.5 APPLICATION DATA ................................................................................. 30
1.5.1 Selection of location for installation................................................. 31
1.5.2 Installation of indoor unit...................................................................32
1.5.3 Installation of outdoor unit ................................................................34
1.5.4 Refrigerant piping ............................................................................... 35
1.5.5 Test run ................................................................................................ 36
1.5.6 Precautions for wireless remote controller installation and
operation .............................................................................................37
1.6 MAINTENANCE DATA .............................................................................. 38
1.6.1 Trouble shooting.................................................................................38
1.6.2 Servicing..............................................................................................48
1.6.3 Power supply remote operation ........................................................ 49

3
SRK-GZ
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 opera-
tion control switch and the outdoor unit is composed of condensing unit with compressor.
(1) Inverter (Frequency converter) for multi-steps power control
¡Heating/Cooling
The rotational speed of a compressor is changed in step in relation to varying load, to interlock with the indoor and outdoor
unit fans controlled to changes in frequency, thus controlling the power.
¡Allowing quick heating/cooling operation during start-up period. Constant room temperature by fine-tuned control after the
unit has stabilized.
(2) Fuzzy control
¡Fuzzy control calculates the amount of variation in the difference between the suction air temperature and the setting tem-
perature in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency.
(3) Remote control flap
The flap can be automatically controlled by operating wireless remote control.
¡Natural flow (AUTO): 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.
(4) 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. (See Page 39)
1.1.2 How to read the model name
Example : SR K 35 GZ – L 1
Series No.
CE marking model
Inverter type
Product capacity
Wall mounted type room air-conditioner
Split type room air-conditioner

4
SRK-GZ
1.2 SELECTION DATA
1.2.1 Specifications
Model SRK25GZ-L1 (Indoor unit)
SRC25GZ-L1 (Outdoor unit)
Item
Model SRK25GZ-L1 SRC25GZ-L1
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]
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
Height ×Width ×Depth mm 250 ×750 ×178 540 ×645 ×245
Color Ivory white Polar white
Net weight kg 7.5 28
Refrigerant equipment
Compressor type & Q’ty –RM5465GA1 (Rotary type) ×1
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 R0.35 (BARREL FREEZE 32SAM)
Deice control MC control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 18 20
(Cooling) 7.0 21
Air flow (at High) (Heating) CMM 7.5 21
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote controller –
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ9.52 (3/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m
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.)
Operation data
(1)
Refrigerant
piping
Compressor: Overheat protection, heating overload protection (High pressure control), overcurrent pro-
tection, serial signal error protection, indoor fan motor error protection

5
SRK-GZ
Item
Model SRK35GZ-L1 SRC35GZ-L1
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]
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
Height ×Width ×Depth mm 275 ×790 ×174 542 ×795 ×255
Color Ivory white Polar white
Net weight kg 8 35
Refrigerant equipment
Compressor type & Q’ty –RM5485GAE3 [Rotary type] ×1
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 R0.35 (BARREL FREEZE 32SAM)
Deice control MC control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 16 18
(Cooling) 7 24
Air flow (at High) (Heating) CMM 10 24
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote controller –
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ12.7 (1/2″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m
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.
Model SRK35GZ-L1 (Indoor unit)
SRC35GZ-L1 (Outdoor unit)
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.)
Operation data
(1)
Refrigerant
piping
Compressor: Overheat protection, heating overload protection (High pressure control), overcurrent
protection, frosting protection, serial signal error protection, indoor fan motor error protection

6
SRK-GZ
Item
Model SRK502Z-L SRC502Z-L
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]
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
Height ×Width ×Depth mm 275 ×790 ×189 595 ×720 ×290
Color Ivory white Polar white
Net weight kg 9 36
Refrigerant equipment
Compressor type & Q’ty –GR5490FD4 [Scroll type] ×1
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 R0.35 (BARREL FREEZE 32SAM)
Deice control MC control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 26 35
(Cooling) 10 26
Air flow (at High) (Heating) CMM 10.5 30
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber – Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote controller –
Room temperature control MC. Thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), ECONO (Orange), HI POWER (Green)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ12.7 (1/2″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m
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.
Model SRK502Z-L (Indoor unit)
SRC502Z-L (Outdoor unit)
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.)
Operation data
(1)
Refrigerant
piping
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

7
SRK-GZ
1.2.2 Range of usage & limitations
(1) Inlet air temperature
(a) Cooling operation
(2) Total one way piping length and vertical height difference.
Applicable temp.
range
Applicable temp. range
JIS-Cooling
JIS-Heating
Indoor air temp. ºC W.B.
Outdoor air temp. ºC W.B.
Note: The chart is the result from the continuous opera-
tion under constant air temperature conditions,
however, excludes the initial pull-down stage.
Note: The chart is the result from the continuous operation un-
der constant air temperature conditions, however, ex-
cludes the initial pull-down stage and any possible de-
frost cycles.
Outdoor air temp. ºC D.B.
Indoor air temp. ºC D.B.
(b) Heating operation
Model
Item All models
Maximum (V) 198
Maximum (V) 264
(3) Voltage application
Model SRK25GZ-L1
Item SRK35GZ-L1 SRK502Z-L
Total one way piping length (m) 15 25
Outdoor unit is higher 515
Outdoor unit is lower 515
Vertical height
difference (m)

8
SRK-GZ
A750
75
92 40
60
746.9
7.5 62 62 7.5
16
VIEW A
75615
150 450 150
Room temp.
thermistor
Terminal
block
Piping for Gas (Ø9.52) 370
Piping for Liquid (Ø6.35) 420
Piping hole
(Ø65)
Piping hole
(Ø65)
Piping hole right (left)
178 3
250
4615
19
9236.5
4.5
36
117
40
37
36
569
49
A790
15
67
51
60
62 18
16
780
VIEW A
15760
170 450 170
Room temp.
thermistor
Terminal block
Piping for Gas
(
Ø 12.7) 390
Piping for Liquid (
Ø 6.35) 440
Drain hose 600 (
Ø 16)
Piping hole
(
Ø 65)
Piping hole
( Ø 65)
Piping hole right (left)
Unit: mm
174 3
275
187.5 61
46
9260
117
37
6
36
56
9
49
1.2.3 Exterior dimensions
(1) Indoor unit
Model SRK25GZ-L1 Unit: mm
Model SRK35GZ-L1
Remote controller
Remote controller