Mitsubishi Heavy Industries SRK50HE-S User manual

WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air to air heat pump type)
SRK50HE-S, SRK56HE-S
(Split system, air cooled cooling only type)
SRK50CE-S, SRK56CE-S
TECHNICAL MANUAL
& PARTS LIST
DRAFT

INDOOR UNIT
Models SRK50HE-S, SRK56HE-S
SRK50CE-S, SRK56CE-S
OUTDOOR UNIT
Models SRC50HE-S, SRC56HE-S
SRC50CE-S, SRC56CE-S
REMOTE CONTROLLER

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1
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Error of signal transmission
1GENERAL INFORMATION
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) Remote control flap
The flap can be automatically controlled by operating wireless remote controller.
¡Air scroll: Flap operation is automatically control.
¡Swing: This will swing the flap up and down.
¡Memory flap: Once the flap position is set, the unit memorizes the position and continues to operate at the same position from
the next time.
(2) Automatic operation
When the remote control switch is set on “auto( ) ”, it will either automatically decide operation mode such as cooling, heating
and thermal dry, or operate in the operation mode before it has been turned to automatic control.
(3) Self diagnosis function
¡We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as
follows.
1.2 How to read the model name
Example : SR K 50 H E - S
Room temperature sensor error
Indoor fan motor error
Heat exchanger sensor error
2 time flash
6 time flash
TIMER light
ON
1 time flash
Outdoor unit heat exchanger
sensor error
Discharge pipe sensor error
Outdoor temperature sensor error
2 time flash
4 time flash
RUN light
keeps flashing
1 time flash
OFF
OFF
OFF
Over heat of compressor
5 time flash
RUN light
ON
5 time flash
6 time flash 6 time flash
RUN light TIMER light Outdoor (LED)
R410A models
Series No.
H: Heat pump type
C: Cooling only type
Product capacity
Wall mounted type
Split type room air-conditioner
2 time flash OFF Abnormality of outdoor unit

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Item
Model SRK50HE-S SRC50HE-S
Cooling capacity(1) W4700
Heating capacity(1) W5300
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 1.41
Running current (Cooling) A 6.5/6.3/6.0
Heating input kW 1.40
Running current (Heating) A 6.5/6.2/6.0
Inrush current A 39.6
COP Cooling: 3.33 Heating: 3.79
Cooling Sound level Hi 43, Me 39, Lo 34 47
Noise level Power level dB 58 63
Heating Sound level Hi 44, Me 39, Lo 35 49
Power level 61 64
Exterior dimensions
Height ×Width ×Depth mm 298 ×840 ×259 640 ×850 ×290
Color Cool white Stucco white
Net weight kg 12 44
Refrigerant equipment
Compressor type & Q’ty –RM-B5118MNE5 (Rotary type) ×1
Motor kW –1.4
Starting method –Line starting
Heat exchanger Louver fins & inner grooved tubing Straight fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Refrigerant(3) kg R410A 1.4 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.7 (MA68)
Deice control Microcompter control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 27 35
(Cooling) 10.0 38.0
Air flow (at High) (Heating) CMM 12.5 38.0
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 Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ12.7 (1/2″)
Connecting method Flare Connection
Attached length of piping Liquid line: 0.54 m
Gas line : 0.47 m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts –
Notes (1) The data are measured at the following conditions.
2SELECTION DATA
2.1 Specifications
Model SRK50HE-S (Indoor unit)
SRC50HE-S (Outdoor unit)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is longer, when it is 15 to 25 m, add 20 g refrigerant per meter.
Operation data
(2)
Refrigerant
piping
Compressor: Overheat protection, Serial signal error protection, Indoor fan motor error protection, Frost
protection
The piping length is 7.5m.

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Item
Model SRK56HE-S SRC56HE-S
Cooling capacity(1) W5100
Heating capacity(1) W5800
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 1.59
Running current (Cooling) A 7.3/7.1/6.8
Heating input kW 1.58
Running current (Heating) A 7.4/7.1/6.8
Inrush current A 45.2
COP Cooling: 3.21 Heating: 3.67
Cooling Sound level Hi 44, Me 40, Lo 35 49
Noise level Power level dB 59 64
Heating Sound level Hi 44, Me 39, Lo 35 51
Power level 61 65
Exterior dimensions
Height ×Width ×Depth mm 298 ×840 ×259 640 ×850 ×290
Color Cool white Stucco white
Net weight kg 12 44
Refrigerant equipment
Compressor type & Q’ty –RM-B5120MNE5 [Rotary type] ×1
Motor kW –1.5
Starting method –Line starting
Heat exchanger Louver fins & inner grooved tubing Straight fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Refrigerant(3) kg R410A 1.4 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.7 (MA68)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 27 35
(Cooling) 11.0 38.0
Air flow (at High) (Heating) CMM 12.5 38.0
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 Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ12.7 (1/2″)
Connecting method Flare connection
Attached length of piping Liquid line: 0.54 m
Gas line : 0.47 m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts –
Notes (1) The data are measured at the following conditions.
Model SRK56HE-S (Indoor unit)
SRC56HE-S (Outdoor unit)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is longer, when it is 15 to 25 m, add 20 g refrigerant per meter.
Operation data
(2)
Refrigerant
piping
Compressor: Overheat protection, Serial signal error protection, Indoor fan motor error protection, Frost
protection
The piping length is 7.5m.

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Item
Model SRK50CE-S SRC50CE-S
Cooling capacity(1) W4700
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 1.41
Running current (Cooling) A 6.5/6.3/6.0
Inrush current A 39.6
COP Cooling: 3.33
Cooling Sound level Hi 43, Me 39, Lo 34 47
Noise level Power level dB 58 63
Exterior dimensions
Height ×Width ×Depth mm 298 ×840 ×259 640 ×850 ×290
Color Cool white Stucco white
Net weight kg 12 44
Refrigerant equipment
Compressor type & Q’ty –RM-B5118MNE5 (Rotary type) ×1
Motor kW –1.4
Starting method –Line starting
Heat exchanger Louver fins & inner grooved tubing Straight fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Refrigerant(3) kg R410A 1.4 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.7 (MA68)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 27 35
Air flow (at High) (Cooling) CMM 10.0 38.0
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 Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ12.7 (1/2″)
Connecting method Flare connection
Attached length of piping Liquid line: 0.54 m
Gas line : 0.47 m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts –
Notes (1) The data are measured at the following conditions.
Model SRK50CE-S (Indoor unit)
SRC50CE-S (Outdoor unit)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is longer, when it is 15 to 25 m, add 20 g refrigerant per meter.
Operation data
(2)
Refrigerant
piping
Compressor: Overheat protection, Serial signal error protection, Indoor fan motor error protection, Frost
protection
The piping length is 7.5m.

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Item
Model SRK56CE-S SRC56CE-S
Cooling capacity(1) W5100
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 1.59
Running current (Cooling) A 7.3/7.1/6.8
Inrush current A 45.2
COP Cooling: 3.21
Cooling Sound level Hi 44, Me 40, Lo 35 49
Noise level Power level dB 59 64
Exterior dimensions
Height ×Width ×Depth mm 298 ×840 ×259 640 ×850 ×290
Color Cool white Stucco white
Net weight kg 12 44
Refrigerant equipment
Compressor type & Q’ty –RM-B5120MNE5 [Rotary type] ×1
Motor kW –1.5
Starting method –Line starting
Heat exchanger Louver fins & inner grooved tubing Straight fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Refrigerant(3) kg R410A 1.4 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.7 (MA68)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 27 35
Air flow (at High) (Cooling) CMM 11.0 38.0
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 Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ12.7 (1/2″)
Connecting method Flare connection
Attached length of piping Liquid line: 0.54 m
Gas line : 0.47 m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts –
Notes (1) The data are measured at the following conditions.
Model SRK56CE-S (Indoor unit)
SRC56CE-S (Outdoor unit)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is longer, when it is 15 to 25 m, add 20 g refrigerant per meter.
Operation data
(2)
Refrigerant
piping
Compressor: Overheat protection, Serial signal error protection, Indoor fan motor error protection, Frost
protection
The piping length is 7.5m.

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2.2 Range of usage & limitations
Indoor return air temperature
(Upper, lower limits)
Refrigerant line (one way) length Max. 25m
All models
Refer to the selection chart
Power source voltage Rating ±10%
Voltage at starting Min. 85% of rating
Frequency of ON-OFF cycle Max. 10 times/h
ON and OFF interval Max. 3 minutes
Outdoor air temperature
(Upper, lower limits)
Vertical height difference between
outdoor unit and indoor unit
Max. 15m (Outdoor unit is higher)
Max. 15m (Outdoor unit is lower)
Item
Models
2.3 Exterior dimensions
(1) Indoor unit
Models All models
Unit: mm
840
298
A
Piping hole right
259
9
44
right: 67 left : 60
3
60
60 14.5
813
603
44
44
60
60
VIEW A
44.5
47.5220.5
50
207.5
73.5
53.5
Piping hole (ø65) Piping hole (ø65)
Indoor unit
Installating board
Drain hose 515 (ø16)
Piping for gas 533.5 (ø12.7)
Piping for liquid 603.5 (ø6.35)
63.5
8.5
5.3 284.2
44.5
73.5
182.5
50
450
693
25

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(2) Outdoor unit
Models All models
Drain holes
286.4
12
50
290
49.6 43.5
850
203.1 510 136.9
476
Elogated hole
(2-12 x16)
314 12
328
Terminal block
Service valve (Liquid)
ø6.35 (1/4'')
Service valve (Gas)
ø12.7 (1/2'')
Ground
terminal
124 34.6
20˚
20˚
42.7
100.3
15
640
14

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2.4 Piping system
Models SRK50HE-S, 56HE-S
Outdoor unitIndoor unit
Heat
exchanger
Room temp.
sensor
Heat
exchanger
Flare connection
Heat
exchanger
sensor
Piping
(Liquid)
ø6.35
Check joint
4 way valve
Service valve (Liquid)
Flare connection
Discharge pipe
temp. sensor
Cooling cycle
Heating cycle Outdoor air
temp. sensor
Heat exchanger
sensor
Compressor
Capillary tube
Strainer
Accumulator
Service valve
(Gas)
Electronic
expansion valve
Piping
(Gas)
ø12.7
Models SRK50CE-S, 56CE-S
Outdoor unitIndoor unit
Room temp.
sensor
Heat
exchanger
Flare connection
Heat
exchanger
sensor
Piping
(Liquid)
ø6.35
Check joint
Service valve (Liquid)
Flare connection
Discharge pipe
temp. sensor
Cooling cycle
Outdoor air
temp. sensor
Heat
exchanger
Heat exchanger
sensor
Compressor
Capillary tube
Accumulator
Service valve
(Gas)
Electronic
expansion valve
Piping
(Gas)
ø12.7
Strainer
Capillary tube
Capillary tube

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2.5 Selection chart
Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be
obtained in the following way.
Net capacity = Capacity shown on specification ✕ Correction factors as follows.
(1) Coefficient of cooling and heating capacity in relation to temperatures
(2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor
units.
(3) Correction relative to frosting on outdoor heat exchanger during heating
In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the
outdoor heat exchanger.
How to obtain the cooling and heating capacity
Example : The net cooling capacity of the model SRK50HE-S with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C
and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 4700 ✕0.975 ✕1.0 =4583 W
SRK50HE-S Length 15m Factor by air
temperatures
15
ISO-T1 Standard ConditionOutdoor air W.B. temperature °C W.B.
010-10 -5 5
14 16 18 20 22
15
10
27
25
20
15
20
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
43
24
20
ISO-T1 Standard ConditionIndoor air W.B. temperature °C W.B.
Heating
Cooling
Applicable range
Coefficient of cooling & Heating capacity in relation to temperature
Cooling operation
Outdoor air D.B.
temperature
°C D.B.
Heating operation
Indoor air D.B.
temperature
°C D.B.
Air inlet temperature of
outdoor unit in ˚CWB
Adjustment coefficient
-10
0.95
-9
0.94
-7
0.93
-5
0.91
-3
0.88
-1
0.86
1
0.87
3
0.92
5
1.00
Piping length [m]
Cooling
Heating
7
1.0
1.0
10
0.99
1.0
15
0.975
1.0
20
0.965
1.0
25
0.95
1.0

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3ELECTRICAL DATA 3.1 Electrical wiring
Models SRK50HE-S, 56HE-S
Power source
1 Phase
220-240V 50Hz
Outdoor unit
Indoor unit
HEAT
EXCHANGER
Printed circuit board
Printed circuit board
BR
LB
Y/GN
BK
WH
RD
RD
1
3
4
5
6
CNU
BK
WH
Y
BL
TB TB
F
250V
3.15A
N
ZNR
CNM
CNE CNG
52C3
52C
52C4 JG
Th1 Th2
52C
52X352X252X1
1
3
2N
1
3
( )
FM I
SM
Display
Wireless
R-Amp
2N
BK WH
WH
WH
RD
Y/GN
Y/GN
CNG
(250V 3.15A)
ZNR
G1
D.S
+-
J N L
CM2
F
52X1
CM1
3
52X2
52X3 1
CNE
WH
RD
CC
WH
CM
BK
BK
51C
CNB
CNU
20S
Th4
Th5
Th6
WV
U
5
3
FMo
WH
BK
CFO
OR
WH
EEV
RL
Black
Brown
Red
Light Blue
White
Yellow/Green
BK
BR
RD
LB
WH
Yellow
Y
Orange
OR
Y/GN
Color symbol
Meaning of marks
Symbol Parts name
CM Compressor motor
FFuse
FMIFan motor (Indoor)
FMo Fan motor (Outdoor)
SM Flap motor
RL Inspection lamp
Symbol Parts name
Th1Room temp. sensor
Th2
Heat exchanger sensor (Indoor unit)
Th4
Heat exchanger sensor (Outdoor unit)
Th5Outdoor air temp. sensor
Th6Discharge pipe sensor
Symbol Parts name
ZNR Varistor
20S 4 way valve (coil)
52C Magnetic contactor
DS Diode stack
52X1-3 Auxiliary relay
EEV Electronic expansion valve
51C Motor Protector for CM
TB Terminal block

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Models SRK50CE-S, 56CE-S
Meaning of marks
Symbol Parts name
CM Compressor motor
FFuse
FM
I
Fan motor (Indoor)
FMo Fan motor (Outdoor)
SM Flap motor
RL Inspection lamp
Symbol Parts name
Th 1
Room temp. sensor
Th
2
Heat exchanger sensor (Indoor unit)
Th 4
Heat exchanger sensor (Outdoor unit)
Th 5
Outdoor air temp. sensor
Th
6
Discharge pipe sensor
Symbol Parts name
ZNR Varistor
52C Magnetic contactor
DS Diode stack
52X
1-2 Auxiliary relay
EEV Electronic expansion valve
51C Motor Protector for CM
TB Terminal block
Power source
1 Phase
220-240V 50Hz
Outdoor unit
Indoor unit
HEAT
EXCHANGER
Printed circuit board
Printed circuit board
BR
LB
Y/GN
BK
WH
RD
RD
1
3
4
5
6
CNU
BK
WH
Y
BL
TB TB
F
250V
3.15A
N
ZNR
CNM
CNE CNG
52C3
52C
52C4 JG
Th1 Th2
52C
1
3
( )
FM I
SM
Display
Wireless
R-Amp
Black
Brown
Red
Light Blue
White
Yellow/Green
BK
BR
RD
LB
WH
Yellow
Y
Orange
OR
Y/GN
Color symbol
BK WH
WH
RD
Y/GN
Y/GN
3
1
CNG
(250V 3.15A)
ZNR
G1
D.S
+-
J N L
CM2
F
52X1
CM1
52X2
CNE
WH
RD
CC
WH CM
BK
BK 51C
CNU
Th4
Th5
Th6
W
V
U
5
3
FMo
WH
BK
CFO
OR
WH
EEV
RL
52X 1 52X 2
2N2N

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LO
MED
HI
AUTO
HI POWER ECONO
ON OFF
AM PM
FAN SPEED button
Each time the button is pushed, the indi-
cator is switched over in turn.
•The above illustration shows all controls, but in practice
only the relevant parts are shown.
OPERATION MODE select button
Each time the button is pushed, the indi-
cator is switched over in turn.
AIR FLOW button
This button changes the flap mode. When
pressed, this button changes the mode in the
following order:
ON/OFF button
Press for starting operation, press again for
stopping.
HI POWER button
This button changes the HIGH POWER
mode.
ECONO button
This button changes the ECONOMY mode.
RESET switch
Switch for resetting microcomputer.
ON TIMER button
This button selects ON TIMER operation.
Time switch
This switch for setting the time.
OFF TIMER button
This button selects OFF TIMER operation.
TEMPERATURE button
This button sets the room temperature.
(This button changes the present time and
TIMER time.)
CANCEL button
This button cancels the ON timer and OFF
timer.
RESERVE button
This button sets the present time and
TIMER time.
SIndication section
OPERATION MODE indicator
Indicates selected operation with lamp.
Heat pump type:
[ (Auto) • (Cool) • (Heat) • (Dry)]
Cooling only type:
[ (Auto) • (Cool) • (Fan) • (Dry)]
TEMPERATURE indicator
Indicates set temperature.
(Does not indicate temperature when operation
mode is on AUTO)
FAN SPEED indicator
Indicates set air flow rate with lamp.
AIR FLOW indicator
Shows selected flap mode.
HIGH POWER MODE indicator
Indicates during high power mode operation.
ECONOMY MODE indicator
Indicates during economy mode operation.
ON TIMER indicator
Indicates during ON TIMER operation.
TIME indicator
Indicates present time or timer setting time.
OFF TIMER indicator
Indicates OFF TIMER operation.
Models All models
Remote controller
SOperation section
(Air scroll) (Swing)
4OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
4.1 Operation control function by remote control switch
(Flap stopped)

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Unit indication section
Models All models
ECONOMY light (orange)
Illuminates during ECONOMY operation.
TIMER light (yellow)
Illuminates during TIMER operation.
HI POWER light (green)
Illuminates during HIGH POWER operation.
RUN (HOT KEEP) light (green)
•Illuminates during operation.
•Brinks at air flow stop due to the ‘HOT KEEP’.

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5INSTALLATION
R410A refrigerant is used for this air-conditioner. Execute the installation work while taking care of the following points in addition to
the general caution items.
5.1 Installation tools
Prepare the following special tools for R410A in addition to the general-purpose tools.
¡Flare tool ¡Vacuum pump adaptor
¡Gauge manifold ¡Leak detector
¡Charge hose
Service valve
(3-way)
Compound
pressure gauge
Pressure
gauge Gauge manifold
(Special for R410A)
Handle Hi
Charge hose
(Special for R410A)
Vacuum pump adaptor
(For reverse flow prevention)
(Special for R410A)
Service Port
-101kPa
(-76cmHg)
Handle Lo
Vacuum Pump
Charge Hose
(Special for R410A)
Service valve
(Two-way)
5.2 Refrigerant piping
¡Use the copper pipe that has less than 40 mg/10 m of oil adhesion and 0.8 mm of wall thickness. Never use the thin walled pipe the
thickness of which is less than 0.8 mm.
¡Use the flare nut attached to the air-conditioner.
5.3 Pipe connection
(1) Pipe working
(2) Tightening torque
¡The tightening torque is shown below.
(3) Vacuuming
¡The charge hose for R22 cannot be connected because the service port diameter is different from the conventional one. Use
the special charge hose for R410A.
¡Use the vacuum pump adapter for reverse flow prevention to check the reverse flow of vacuum pump oil. If oil flows back to
the air-conditioner, it causes failure of refrigerant cycle.
Copper pipe dia.
Liquid side ø6.35
Gas side
Dimension "A" (mm)
9.1
13.2
16.6
ø9.52
ø12.7
Liquid side
Gas side
ø6.35
ø9.52
ø12.7
17
22
24
14 ~ 18 (1.4 ~ 1.8)
33 ~ 42 (3.3 ~ 4.2)
50 ~ 62 (5.0 ~ 6.2)
Copper pipe dia.
Across flats of flare nut
(mm)
Tightening torque
N·m (kgf·m)
Copper pipe dia.
ø6.35
ø9.52
ø12.7
Flare tool bar Copper pipe
Dimension "B" Dimension "B" (mm)
Clutch type flare tool for R410A
0.0 ~ 0.5
0.0 ~ 0.5
0.0 ~ 0.5

-
15
-
PARTS LIST (Main parts)
(1) Indoor unit
No.
1
2
3
4
5
6
7
8
9
PANEL ASSY, FRONT
PANEL, FRONT
GRILLE ASSY, AIR INLET
GRILLE ASSY, AIR OUTLET
MOTOR, DC
IMPELLER
HEAT EXCH ASSY(AIR)
PWB ASSY
CONTROL ASSY, REMOTE
RKT102A750
RKT122A600B
RKT435A600B
RKT435A750
SSA512T046B
SSA431G040C
RKT301A750
RMA502A001
RKV505A200JRKV505A200G
Parts No.
Parts Name
SRK56HE-SSRK50HE-S
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
PANEL, FRONT
PANEL, SIDE(R)
PANEL, SIDE(L)
PANEL, TOP
GRILLE, AIR OUTLET
GUARD, FIN
BRACKET, MOTOR
MOTOR, AC
PROPELLER
BASE ASSY
HEAT EXCH ASSY(AIR)
VALVE, S(4WAY)
COIL, SOLENOID
COMPRESSOR ASSY
PWB ASSY
VALVE, BODY(EXP)
COIL,SOLENOID
RWC122A003
RWC123A005F
RWC123A002
RWC124A003
RWC435A002
RWC131A004
RWC116A041
SSA511C063A
SSA431B233
RWC111A003H
RWC301A023
SSA382C078
RSA382F010B
RCP505A500C
SSA387F035
SSA382F210A
AHT201A540NDAHT201A530ND
Parts No.
Parts Name
SRC56HE-SSRC50HE-S
(2) Outdoor unit

-
16
-
PARTS LIST (Main parts)
(1) Indoor unit
No.
1
2
3
4
5
6
7
8
9
PANEL ASSY, FRONT
PANEL, FRONT
GRILLE ASSY, AIR INLET
GRILLE ASSY, AIR OUTLET
MOTOR, DC
IMPELLER
HEAT EXCH ASSY(AIR)
PWB ASSY
CONTROL ASSY, REMOTE
RKT102A750
RKT122A600B
RKT435A600B
RKT435A750
SSA512T046B
SSA431G040C
RKT301A750
RMA502A001
RKV505A200KRKV505A200H
Parts No.
Parts Name
SRK56CE-SSRK50CE-S
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
PANEL, FRONT
PANEL, SIDE(R)
PANEL, SIDE(L)
PANEL, TOP
GRILLE, AIR OUTLET
GUARD, FIN
BRACKET, MOTOR
MOTOR, AC
PROPELLER
BASE ASSY
HEAT EXCH ASSY(AIR)
COMPRESSOR ASSY
PWB ASSY
VALVE, BODY(EXP)
COIL, SOLENOID
RWC122A003
RWC123A005F
RWC123A002
RWC124A003
RWC435A002
RWC131A004
RWC116A041
SSA511C063A
SSA431B233
RWC111A003H
RWC301A023A
RCP505A500C
SSA387F035
SSA382F210A
AHT201A540NDAHT201A530ND
Parts No.
Parts Name
SRC56CE-SSRC50CE-S
(2) Outdoor unit

WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
Air-Conditioning & Refrigeration Systems Headquarters
16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan
Fax : [phone]