Mitsubishi Heavy Industries SRK50HE-S1 User manual

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3
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WALL MOUNTED TYPE ROOM AIR-CONDITIONER
( Split system, air to air heat pump type )
SRK50HE-S1, SRK56HE-S1
SRK63HE-S1, SRK71HE-S1
Manual No. ’06
.
SRK-T
.
050
updated September 29, 2009

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137
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( )
2.2 SRK50HE-S1
SRK56HE-S1 .........................................................176
2.3 SRK63HE-S1
SRK71HE-S1 .........................................................211
2. WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
Split system, air to air
heat pump type

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176
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CONTENTS
2.2.1 GENERAL INFORMATION ...................................................................... 177
(1) Specific features................................................................................... 177
(2) How to read the model name .............................................................. 177
2.2.2 SELECTION DATA ................................................................................... 178
(1) Specifications ....................................................................................... 178
(2) Range of usage & limitations .............................................................. 180
(3) Exterior dimensions ............................................................................. 180
(4) Piping system ....................................................................................... 181
(5) Selection chart...................................................................................... 182
2.2.3 ELECTRICAL DATA ................................................................................. 183
(1) Electrical wiring .................................................................................... 183
2.2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER............ 184
(1) Operation control function by remote control switch ...................... 184
(2) Unit ON/OFF button .............................................................................. 185
(3) Power blackout auto restart function ................................................. 185
(4) Custom cord switching procedure ..................................................... 186
(5) Flap control ........................................................................................... 186
(6) Comfortable timer setting.................................................................... 187
(7) Outline of heating operation ............................................................... 187
(8) Outline of cooling operation ............................................................... 190
(9) Outline of dehumidifying operation.................................................... 191
(10) Outline of automatic operation ........................................................... 192
(11) Outline of fan operation ....................................................................... 192
(12) Protective control function.................................................................. 193
2.2.5 APPLICATION DATA ............................................................................... 195
(1) Selection of location for installation .................................................. 196
(2) Installation of indoor unit .................................................................... 197
(3) Installation of outdoor unit .................................................................. 200
(4) Refrigerant piping ................................................................................ 200
(5) Test run.................................................................................................. 201
(6) Precautions for wireless remote controller installation and
operation ............................................................................................... 202
2.2.6 MAINTENANCE DATA ............................................................................. 203
(1) Troubleshooting procedures for electrical equipment ..................... 203
(2) Servicing ............................................................................................... 210
2.2.7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL
FOR AIR CONDITIONERS USING R410A .............................................. 210

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177
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Error of signal transmission
2.2.1 GENERAL INFORMATION
(1) Specific features
The “MITSUBISHI HEAVY INDUSTRIES, LTD.” 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 operation control switch and the outdoor unit is composed of condensing unit with compressor.
(a) 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.
(b) 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.
(c) 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.
(2) How to read the model name
Example : SR K 50 H E - S1
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.
Heat pump type
Product capacity
Wall mounted type
Split type room air-conditioner
2 time flash OFF Abnormality of outdoor unit

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178
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Item
Model SRK50HE-S1 SRC50HE-S1
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.
2.2.2 SELECTION DATA
(1) Specifications
Model SRK50HE-S1 (Indoor unit)
SRC50HE-S1 (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
(1)
Refrigerant
piping
Compressor: Overheat protection, Serial signal error protection, Indoor fan motor error protection, Frost
protection
The piping length is 7.5m.
(220/230/240V)

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179
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Item
Model SRK56HE-S1 SRC56HE-S1
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-S1 (Indoor unit)
SRC56HE-S1 (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
(1)
Refrigerant
piping
Compressor: Overheat protection, Serial signal error protection, Indoor fan motor error protection,
Frost protection
The piping length is 7.5m.
(220/230/240V)

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180
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(2) Range of usage & limitations
Indoor return air temperature
(Upper, lower limits)
Refrigerant line (one way) length Max. 25m
All models
Cooling operation : Approximately 21 to 32˚C
Heating operation : Approximately 15 to 30˚C
Cooling operation : Approximately 21 to 43˚C
Heating operation : Approximately -5 to 21˚C
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
(3) Exterior dimensions
(a) 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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181
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(b) 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
(4) Piping system
Models SRK50HE-S1, 56HE-S1
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
Capillary tube

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182
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(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.
(a) Coefficient of cooling and heating capacity in relation to temperatures
(b) 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.
(c) Correction relative to frosting on outdoor heat exchanger during heating
In additions to the foregoing corrections (a), (b) 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-S1 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-S1 Length 15m Factor by air
temperatures
15
ISO-T1 Standard ConditionOutdoor air W.B. temperature ˚C W.B.
1005-5
16 18 20 22 24
20
ISO-T1 Standard ConditionIndoor air W.B. temperature ˚C W.B.
Heating
Applicable range
27
25
20
15
21
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
43
Cooling
Heating operation
Indoor air D.B.
temperature
˚C D.B.
Cooling operation
Outdoor air D.B.
temperature
˚C D.B.
Coefficient of cooling & Heating capacity in relation to temperature
Air inlet temperature of
outdoor unit in ˚CWB
Adjustment coefficient
-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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2.2.3 ELECTRICAL DATA
(1) Electrical wiring
Models SRK50HE-S1, 56HE-S1
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
52X
3
52X
2
52X
1
1 3
2N
1 3
( )
FM
I
SM
Display
Wireless R-Amp
2N
BK
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 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
20S 4 way valve (coil) 52C Magnetic contactor
DS Diode stack 52X
1-3
Auxiliary relay
EEV Electronic expansion valve
51C Motor Protector for CM TB Terminal block