Mitsubishi Heavy Industries SRK52CF-BN User manual

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3
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WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
TECHNICAL MANUAL
Collection data
Manual No. ’06
.
SRK-T
.
062
(Split system, air cooled cooling only type)
SRK52CF-BN, 71CF-BN
SRK52CF-BP, 71CF-BP

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1
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CONTENTS
1. GENERAL INFORMATION .............................................................................. 1
1.1 Specific features ....................................................................................... 1
1.2 How to read the model name ................................................................... 1
2. SELECTION DATA .......................................................................................... 2
2.1 Specifications ........................................................................................... 2
2.2 Range of usage & limitations .................................................................. 6
2.3 Exterior dimensions ................................................................................. 6
2.4 Piping system ........................................................................................... 8
2.5 Selection chart .......................................................................................... 9
3. ELECTRICAL DATA ........................................................................................ 10
3.1 Electrical wiring ........................................................................................ 10
4. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ................... 14
4.1 Operation control function by remote control switch ........................... 14
4.2 Unit ON/OFF button .................................................................................. 16
4.3 Power blackout auto restart function ..................................................... 16
4.4 Custom cord switching procedure ......................................................... 17
4.5 Flap and louver control ............................................................................ 17
4.6 Comfortable timer setting ........................................................................ 18
4.7 Sleep timer operation ............................................................................... 18
4.8 Outline of cooling operation .................................................................... 19
4.9 Outline of dehumidifying operation ........................................................ 20
4.10 Outline of automatic operation................................................................ 21
4.11 Set temperature selection ........................................................................ 21
4.12 Outline of fan operation ........................................................................... 22
4.13 Regulation of outdoor air flow................................................................. 22
4.14 Stop mode ................................................................................................. 23
4.15 External control (remote display)/control of input signal ..................... 24
4.16 Operation permission/prohibition control.............................................. 25
4.17 Protective control function ...................................................................... 25
4.18 List of indoor unit jumper selections...................................................... 28
5. APPLICATION DATA ....................................................................................... 29
5.1 Selection of location for installation ....................................................... 30
5.2 Installation of indoor unit ......................................................................... 31
5.3 Installation of outdoor unit ...................................................................... 34
5.4 Refrigerant piping ..................................................................................... 34
5.5 Test run ...................................................................................................... 36
5.6 Precautions for wireless remote control installation and operation ........ 36
5.7 Installation of wired remote control and super link
adapter (SC-AD-ER) (Optional parts) ...................................................... 37
6. MAINTENANCE DATA .................................................................................... 44
6.1 Troubleshooting procedures for electrical equipment ......................... 44
6.2 Servicing.................................................................................................... 52

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1
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Power supply
Series No.
Cooling only type
Product capacity
Wall mounted type
Split type room air-conditioner
1.2 How to read the model name
Example : SR K 52 C F - BN
TIMER lightRUN light
Error of signal transmission
1GENERAL INFORMATION
1.1 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 equip-
ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
(1) Remote control flap & louver
The flap & louver can be automatically controlled by operating wireless remote control.
¡Flap swing : The flaps swing up and down successively.
¡Louver swing : The louvers swing left and right successively.
¡Multi-directional Air Flow : Activating both up/down air swing and left/right air swing at the same time results in a multi-
directional air flow.
¡Memory flap : Once the flap & louver 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 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.
Room temperature sensor error
Indoor fan motor error
Heat exchanger sensor error
2 time flash
6 time flash
TIMER light
ON
Outdoor heat exchanger sensor
error
Discharge pipe temp. sensor error
Outdoor temperature sensor error
2 time flash
4 time flash
RUN light
keeps flashing
1 time flash
Trouble of outdoor unit
Over heat of compressor
2 time flash
5 time flash
RUN light
ON
6 time flash
(up/down air scroll and
left/right air scroll)
1 time flash
BN: 1 Phase 220-240V 50Hz
BP: 1 Phase 220V 60Hz

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Item
Model SRK52CF-BN SRC52CF-BN
Cooling capacity kW 5.4 / 5.4
Cooling power input kW 1.76 / 1.91
Energy efficiency ratio Btu/hW 10.47 / 9.66
Rating current A 8.8 / 8.7
Cooling capacity kW 5.0 / 5.0
Cooling power input kW 2.06 / 2.20
Energy efficiency ratio Btu/hW 8.29 / 7.75
Rating current A 10.3 / 10.1
Power source 1 Phase, 220-240V, 50Hz
Noise level Cooling Sound level dB Hi 43, Me 40, Lo 37 49
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 640 ×850 ×290
Color Yellowish white Stucco white
Net weight kg 15 46
Refrigerant equipment
Compressor type & Q’ty –2KS314D5AB04 (Rotary type) ×1
Motor kW –1.5
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.25 (Pre-Charged up to the piping length of 7m)
Refrigerant oil R0.67 (ATMOS NM56M or SUNISO 4DGID)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 35
Air flow (at High) (Cooling) CMM 20 38
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
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: φ15.88 (5/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line: 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
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 Wired-Remote control
Notes (1) The data are measured at the following conditions.
2. SELECTION DATA
2.1 Specifications
Model SRK52CF-BN (Indoor unit)
SRC52CF-BN (Outdoor unit)
(2) The operation data are applied to the 220/240V districts respectively.
(3) 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 25m, add 25g refrigerant per meter.
ISO-T1
(JIS)
Refrigerant
piping
Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection
(220/240V)
ISO-T3
(SASO)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
29ºC 19ºC 46ºC 24ºC ISO-T3, SASO 385/386
The piping length is 7.5m.

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Item
Model SRK71CF-BN SRC71CF-BN
Cooling capacity kW 7.03 / 7.03
Cooling power input kW 2.12 / 2.27
Energy efficiency ratio Btu/hW 11.33 / 10.58
Rating current A 10.6 / 10.4
Cooling capacity kW 6.3 / 6.3
Cooling power input kW 2.48 / 2.60
Energy efficiency ratio Btu/hW 8.67 / 8.26
Rating current A 12.4 / 11.9
Power source 1 Phase, 220-240V, 50Hz
Noise level Cooling Sound level dB Hi 45, Me 42, Lo 39 55
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 750 ×880 ×340
Color Yellowish white Stucco white
Net weight kg 15 67
Refrigerant equipment
Compressor type & Q’ty –2JS386D5BC02 (Rotary type) ×1
Motor kW –1.8
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.75 (Pre-charged up to the piping length of 7m)
Refrigerant oil R0.7 (ATMOS NM56M or SUNISO 4GDID)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 85
Air flow (at High) (Cooling) CMM 20.5 60
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
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: φ15.88 (5/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line : 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
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 Wired-Remote control
Notes (1) The data are measured at the following conditions.
Model SRK71CF-BN (Indoor unit)
SRC71CF-BN (Outdoor unit)
(2) The operation data are applied to the 220/240V districts respectively.
(3) 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 25m, add 25g refrigerant per meter.
Refrigerant
piping
Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection
(220/240V)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
29ºC 19ºC 46ºC 24ºC ISO-T3, SASO 385/386
The piping length is 7.5m.
ISO-T1
(JIS)
ISO-T3
(SASO)

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Item
Model SRK52CF-BP SRC52CF-BP
Cooling capacity kW 5.4
Cooling power input kW 1.76
Energy efficiency ratio Btu/hW 10.47
Rating current A 8.8
Cooling capacity kW 5.0
Cooling power input kW 2.06
Energy efficiency ratio Btu/hW 8.29
Rating current A 10.3
Power source 1 Phase, 220V, 60Hz
Noise level Cooling Sound level dB Hi 43, Me 40, Lo 37 49
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 640 ×850 ×290
Color Yellowish white Stucco white
Net weight kg 15 46
Refrigerant equipment
Compressor type & Q’ty –2KS252H5AB04 (Rotary type) ×1
Motor kW –1.2
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.25 (Pre-Charged up to the piping length of 7m)
Refrigerant oil R0.65 (ATMOS NM56M or SUNISO 4GDID)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 29
Air flow (at High) (Cooling) CMM 20 38
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
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: φ15.88 (5/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line: 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
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 Wired-Remote control
Notes (1) The data are measured at the following conditions.
Model SRK52CF-BP (Indoor unit)
SRC52CF-BP (Outdoor unit)
(2) The operation data are applied to the 220V districts respectively.
(3) 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 25m, add 25g refrigerant per meter.
ISO-T1
(JIS)
Refrigerant
piping
Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection
(220V)
ISO-T3
(SASO)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
29ºC 19ºC 46ºC 24ºC ISO-T3, SASO 385/386
The piping length is 7.5m.

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Item
Model SRK71CF-BP SRC71CF-BP
Cooling capacity kW 7.03
Cooling power input kW 2.12
Energy efficiency ratio Btu/hW 11.33
Rating current A 10.6
Cooling capacity kW 6.3
Cooling power input kW 2.48
Energy efficiency ratio Btu/hW 8.67
Rating current A 12.4
Power source 1 Phase, 220V, 60Hz
Noise level Cooling Sound level dB Hi 45, Me 42, Lo 39 55
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 750 ×880 ×340
Color Yellowish white Stucco white
Net weight kg 15 67
Refrigerant equipment
Compressor type & Q’ty –2JS318H5AB02(Rotary type) ×1
Motor kW –1.5
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.75 (Pre-charged up to the piping length of 7m)
Refrigerant oil R0.7 (ATMOS NM56M or SUNISO 4GDID)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 73
Air flow (at High) (Cooling) CMM 20.5 60
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
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: φ15.88 (5/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line : 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
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 Wired-Remote control
Notes (1) The data are measured at the following conditions.
Model SRK71CF-BP (Indoor unit)
SRC71CF-BP (Outdoor unit)
(2) The operation data are applied to the 220V districts respectively.
(3) 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 25m, add 25g refrigerant per meter.
Refrigerant
piping
Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection
(220V)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
29ºC 19ºC 46ºC 24ºC ISO-T3, SASO 385/386
The piping length is 7.5m.
ISO-T1
(JIS)
ISO-T3
(SASO)

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2.2 Range of usage & limitations
2.3 Exterior dimensions
Indoor return air temperature
(Upper, lower limits)
Refrigerant line (one way) length
All models
Cooling operation: Approximately 21 to 32 °C
Cooling operation: Approximately 21 to 54 °C
Power source voltage Rating ±10%
Voltage at starting Min. 85% of rating
Max. 25m
Max. 15m
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
Item
Models
(1) Indoor unit
Models SRK52CF-BN, 71CF-BN, 52CF-BP, 71CF-BP
VIEW A
A
17.360
150
4
43.5
55
64
489
Piping hole right (left)
3
248
55
4
19 51.2
55
Terminal block
1090
Unit: mm
318
77
44.5
7.7
299
106
8.5301.8
25
50
Installation board
450
50
25
Piping for Gas (ø15.88) 633.5
44.5
53.5
106
49.5
349
886
221.547
Indoor unit
1098
Piping for Liquid (ø6.35) 703.5
Drain hose 772 (ø16)
Piping hole (ø65) Piping hole (ø65)

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7
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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)
ø15.88 (5/8'')
Ground
terminal
124 34.6
20˚
20˚
42.7
100.3
15
640
14
(2) Outdoor unit
Models SRC52CF-BN, 52CF-BP
Models SRC71CF-BN, 71CF-BP
Unit: mm
38019
24
750
103.5 48.5
580
880
418
340
88
150 150
27
32
310223
47.561
61
2-R7.5
60
15
Drain holes
Service valve(Gas)
Flare fitting ø15.88(5/8")
Service valve (Liquid)
Flare fitting ø6.35(1/4")
Terminal block
30°
165.5 25
Unit: mm

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2.4 Piping system
Models SRK52CF-BN, 52CF-BP
Models SRK71CF-BN, 71CF-BP
Outdoor unitIndoor unit
Room temp.
sensor
Humidity
sensor
Heat
exchanger
Flare connecting
Heat
exchanger
sensor
Piping
(Liquid)
ø 6.35
Piping
(Gas)
ø15.88
Check joint
Service valve (Liquid)
Flare connecting
Discharge pipe
temp. sensor
Cooling cycle
Muffler*
Outdoor air
temp. sensor
Heat
exchanger
Heat exchanger
sensor
Compressor
Capillary tube Capillary tube
Strainer
Accumulator
Service valve
(Gas)
Electronic
expansion valve
* except for 52CF-BN
Outdoor unitIndoor unit
Room temp.
sensor
Humidity
sensor
Heat
exchanger
Flare connecting
Heat
exchanger
sensor
Piping
(Liquid)
ø 6.35
Piping
(Gas)
Check joint
Service valve (Liquid)
Flare connecting
Discharge pipe
temp. sensor
Cooling cycle
Muffler*
Outdoor air
temp. sensor
Heat
exchanger
Heat exchanger
sensor
Compressor
Capillary tube
Strainer Strainer
Accumulator
Service valve
(Gas)
Electronic
expansion valve
ø15.88
* except for 71CF-BP