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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TABLE OF CONTENTS
[
SCM-HG
]
4 room
[
SCM-HG
]
2 room
[
SCM-CG
]
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

9
SRK-GZ
(2) Outdoor unit
Model SRC25GZ-L1
192.5
372.5
82.5 480
82.5
61.5
2-Ø12 Terminal
block
127.7 33.3
40˚40˚
645
Drain holes
Service valve (Gas)
Flare connecting Ø9.52 (3/8˝)
Service valve (Liquid)
Flare connecting Ø6.35 (1/4˝)
50
12
42
13.5
274.5
300
12 23
44
245
540
100.3 39.7
14.4
Remote controller
Unit: mm
Model SRK502Z-L Unit: mm

10
SRK-GZ
Model SRC35GZ-L1
50
55 Drain holes MAX.80
265 795
58
65
255 272
22 14
23 14
93
44
142.5 510 33142.5
40
32 115
45°
45°
Service
Valve
(Liquid)
Flare connecting
Ø 6.35 (1/4¨)
Service
Valve (Gas)
Flare connecting
Ø 12.7 (1/2¨)
Terminal block
Drain holes
542 539
413
65
15
300
27214
58 44
16 12 (Oval holes)
for unit fixing
2 places
14
50
Unit : mm
Model SRC502Z-L
Unit: mm

11
SRK-GZ
1.2.4 Piping system
Model SRK35GZ-L1
Heat exchanger
Strainer
Service valve (Liquid)
Flare connecting
Service valve (Gas)
Room
temp.
thermistor
Piping (Gas)
Ø12.7
Piping (Liquid)
Ø6.35
Flare connecting
Check
joint
4way valve
Discharge temp.
thermistor Suction
Capillary tube
Check valve
Heat exchanger
Heat exchanger
thermistor
Outdoor air
temp. thermistor
Compressor Accumulator
Discharge
Heat
exchanger
thermistor
Cooling cycle
Heating cycle
Indoor unit Outdoor unit
Outdoor unitIndoor unit
Room temp.
thermistor
Heat
exchanger
Flare connecting
Piping
(Gas)
ø9.52
Heat
exchanger
thermistor
Piping
(Liquid)
ø6.35
Check joint
4 way valve
Service valve (Liquid)
Flare connecting
Discharge temp.
thermistor
Cooling cycle
Heating cycle Outdoor air
temp. thermistor
Heat
exchanger
Heat exchanger
thermistor
Compressor
Capillary tube
Strainer
Accumulator
Service valve
(Gas)
Model SRK25GZ-L1

12
SRK-GZ
1.3 ELECTRICAL DATA
1.3.1 Electrical wiring
Meaning of marks
Symbol Parts name Symbol Parts name Symbol Parts name
CFICapacitor for FMI RE Reactor Tr Transformer
CM Compressor motor SM Flap motor ZNR Varistor
F1,2Fuse Th1 Room temp. thermistor 20S 4 way valve (coil)
FMI Fan motor (Indoor) Th2 Heat exchanger thermistor (Indoor unit) 52C Magnetic contactor
FMO Fan motor (Outdoor) Th3 Humidity thermistor DS Diode stack
NF Noise filter Th5 Heat exchanger thermistor (Outdoor unit) CCapacitor
RL Inspection lamp Th6 Outdoor air temp. thermistor 52X1~2 Auxiliary relay
NK Noise killer Th7 Discharge pipe temp. thermistor EEV Electronic expansion valve
Model SRK502Z-L

13
SRK-GZ
Color symbol
BR
RE
WH
WH
V
V
U
V
W
RD
WH
BK
NF
DS
DS
CNC
CNB
CND
CNW
CNU
CNM
CNE CNG
Th1
Th5
Th6
Th7
Th2
52C3
52C
N
CNBCNC
52C4
J
BK
BL
BR
LB
Y
RD
GY
WH
V
Y/GN
RD
RE
(Power source
Signal line) BK
1
2
3
4
WH
3
2
1
3
2
1
Back up
switch
Power
transistor
Y
WH
RD
Y/GN
WH
BK
RD
WH
GY
RD
WH
BK
Y/GN
Y/GN
LB
BR
Black
Blue
Brown
Light blue
Yellow
Red
Gray
White
Violet
Yellow/Green
F2(15A)
NK
NK
C
RL
CM
ZNR
F1
(250V 3.15A)
CFI
FMI
FM0
20S
SM
Tr
52C
Printed circuit board
Printed circuit board
Power source
1 phase 220/240V 50Hz
Indoor unit Outdoor unit
Display
Wireless
R-Amp
Model SRK25GZ-L1

14
SRK-GZ
Model SRK35GZ-L1
Color symbol
BR
RE
WH
WH
V
V
U
V
W
RD
WH
BK
NF
DS
DS
CNC
CNB
CND
CNW
CNU
CNM
CNE CNG
Th1
Th5
Th6
Th7
Th2
52C3
52C
N
CNBCNC
52C4
J
BK
BL
BR
LB
Y
RD
GY
WH
V
Y/GN
RD
RE
(Power source
Signal line) BK
1
2
3
4
WH
3
2
1
3
2
1
Back up
switch
Power
transistor
Display
CND
Wireless
R-Amp
Y
WH
RD
Y/GN
WH
BK
RD
WH
GY
RD
WH
BK
Y/GN
Y/GN
LB
BR
Black
Blue
Brown
Light blue
Yellow
Red
Gray
White
Violet
Yellow/Green
F2(20A)
NK
NK
C
RL
CM
ZNR
F1
(250V3.15A)
CFI
FMI
FM0
20S
SM
Tr
52C
Printed circuit board
Printed circuit board
Power source
1 phase 220/240V 50Hz
Indoor unit Outdoor unit

15
SRK-GZ
Model SRK502Z-L
Power source
1 phase 220/240V 50Hz
EEV
CNU
CNM
CNE CNH
Back up
switch
Wireless
R-Amp
Display
CNF CNG
Th
3
Th
2
Th
1
Th
7
Th
6
Th
5
ZNR
52C
Printed circuit board
Printed circuit
board
Printed circuit
board
Power transistor
Fuse
250V 25A
WH
Y
BL
Y/GN
LB
BR
RD
WH
BK
RD
CNB
CNB
GY BL
CNA
CNE
DS
IC2
RL
CNA
WH
RD
WH
BK
U
V
W
PN
OR RE
WH
BK
52C-4 52C-3
52C
F250V
3.15A
SJ
BK
RD
3
4
5
2
1
( )
1
2
3
1
2
3
20S
FMo
CM
FMI
SM
Indoor unit Outdoor unit
Colorsymbol
BK Black
BL Blue
BR Brown
Y Yellow
RD Red
LB Light blue
WH White
Y/GN Yellow/Green

16
SRK-GZ
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
(1) Remote control switch
Indoor unit indicator
FAN SPEED ON/OFF MODE
TEMP AIR FLOW
SET TIMER TIMER
ACL
HI POWER
ECONO
CONT HI POWER ECONO
ON OFF TIMER
AUTO
HI
MED
LO
FAN SPEED indicator
Indicators the ¡for the fan speed which has
been set.
ON-TIMER •OFF-TIMER indicator
FAN SPEED button
Each time the button is pushed, the ¡
indicator is switched over in turn.
HI POWER button
This button changes the HI POWER
operation.
SETTEMPERATURE button
This button sets the room temperature.
ECONOMY button
This button changes the ECONOMY operation.
SET TIMER button
This button sets the ON TIMER time or SLEEP
time.
¡Above figure shows all indications for the
purpose of explanation, but practically only
the pertinent parts are indicated.
HI POWER operation indicator
Indicators during HI POWER operation.
ECONOMY operation indicator
Indicators during ECONOMY operation.
Operation switch over indicator
Indicators the ¡for the operation which has
been set.
AIR FLOW indicator
Indicates selected flap mode.
OPERATION MODE select button
Each time the button is pushed, the ¡
indicator is switched over in turn.
ON/OFF button
This button, when pressed, starts operation
and stops when repressed.
AIR FLOW button
This button changes the flap mode.
TIMER button
The button selects ON TIMER operation,
OFF-TIMER operation or normal operation.
Reset switch
Switch for resetting microcomputer.
RUN
TIMER
SRK25GZ INVERTER
RUN (HOT KEEP) lamp (green)
¡Illuminates during operation.
¡Flashes at stop blowing due to the hot keep.
TIMER lamp (yellow)
Illuminates during TIMER operation.
Models All models
Model SRK25GZ-L1
Remote control switch

17
SRK-GZ
(2) Back-up switch
When the remote controller become weak, or if the remote controller is lost or mal-
functioning, this switch may be used to turn the unit on and off.
(a) Operation
Push the switch once to place the unit in the automatic mode. Push it once
more to turn the unit off.
(b) Detail of operation
Operation starts in the same way as the previous operation.
ON/OFF button
ON/OFF button
ON / OFF
Model SRK25GZ-L1
Model SRK35GZ-L1
TIMER RUN
SRK35GZ
RUN (HOT KEEP) lamp (green)
•Illuminates during operation.
•Flashing at stop blowing due to the hot keep.
TIMER lamp (yellow)
Illuminates during TIMER operation.
Model SRK35GZ-L1
Model SRK502Z-L
Model SRK502Z-L
RUN HI POWER ECONO
ECONOMY lamp (orange)
Illuminates during ECONOMY operation.
TIMER
TIMER lamp (yellow)
Illuminates during TIMER operation.
HI POWER lamp (green)
Illuminates during HI POWER operation.
RUN (HOT KEEP) lamp (green)
•Illuminates during operation.
•Flashing at stop blowing due to
the hot keep.

18
SRK-GZ
(3) Flap control
Control the flap by AIRFLOW button on the wireless remote control.
(a) Natural flow (AUTO)
The flap will be automatically set to the angle of air flow best to operation.
(i) Starting time of operation
¡The flap operation as shown above will be
repeated.
¡When the room temperature controller (ther-
mostat) is activated, horizontal blowing is ap-
plied to prevent cool wind from blowing out.
Stops at the level position for
one minute.
sIn case of cooling t
and dry operation
sIn case of heating t
operation
Sway operation
Flap stops 3’50”on
this position.
Sway operation
(c) Swing flap
Flap moves in upward and downward directions continuously.
Horizontal
blowing
(ii) When not operating
The flap returns to the position of air flow directly below, when operation has stopped.
(b) Memory flap (Excepted SRK 25 model)
While the flap is operating if the AIRFLOW button is pushed once, it stops swinging at an angle.
As this angle is memorized in the microcomputer, the flap will be automatically set to the angle when next operation is
started.
¡Recommendable stopping angle of the flap
Slant forward
blowing
COOL•DRY
HEAT
Models SRK25GZ-L1, 35GZ-L1
Model SRK502Z-L
Stops for approximately
13 seconds in this
position. Thick line : Rapid movement
Thin line : Slow movement
Thick line : Rapid movement
Thin line : Slow movement
Stops for approximately
10 seconds in the
horizontal position.
sDuring cooling andt
dry operation sDuring heating t operation