Mitsubishi Electric SRK19CIS User manual

ROOM AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST
WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air cooled cooling only type)
SRK19CIS, 25CIS

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TECHNICAL MANUAL

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CONTENTS
1 GENERAL INFORMATION............................................................................... 3
1.1 Specific features ....................................................................................... 3
1.2 How to read the model name ................................................................... 3
2 SELECTION DATA ........................................................................................... 4
2.1 Specifications............................................................................................ 4
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 .................. 12
4.1 Operation control function by remote control ..................................... 12
4.2 Unit ON/OFF button ................................................................................ 13
4.3 Power blackout auto restart function ................................................... 13
4.4 Custom cord switching procedure........................................................ 14
4.5 Flap and louver control .......................................................................... 14
4.6 TIMER operation ..................................................................................... 15
4.7 Outline of cooling operation .................................................................. 16
4.8 Outline of dry operation ......................................................................... 17
4.9 Outline of auto operation ....................................................................... 18
4.10 Outline of fan operation ......................................................................... 18
4.11 Regulation of outdoor air flow ............................................................... 19
4.12 Stop mode ............................................................................................... 19
4.13 External control (remote display)/control of input signal ................... 20
4.14 Operation permission/prohibition control ............................................ 21
4.15 Protective control function .................................................................... 21
4.16 List of indoor unit jumper selections .................................................... 24
5 APPLICATION DATA ...................................................................................... 25
5.1 Selection of location for installation ...................................................... 26
5.2 Installation of indoor unit ........................................................................ 27
5.3 Installation of outdoor unit ..................................................................... 30
5.4 Refrigerant piping .................................................................................... 30
5.5 Test run ..................................................................................................... 32
5.6
Precautions for wireless remote control installation and operation ........ 32
6 MAINTENANCE DATA ................................................................................... 33
6.1 Troubleshooting procedures for electrical equipment......................... 33
6.2 Servicing ................................................................................................... 41

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1.2 How to read the model name
Example : SR K 19 C IS
TIMER lightRUN light
Error of signal transmission
1 GENERAL 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
outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling
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)Auto operation
When the remote control is set on “aut o ( ) ”, it will either automatically decide operation mode such as cooling and 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
Abnormality of outdoor unit
Over heat of compressor
2 time flash
5 time flash
RUN light
ON
6 time flash
Series No.
Cooling only type
Product capacity
Wall mounted type
Split type room air-conditioner
(up/down air scroll and
left/right air scroll)
1 time flash
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consists of indoor unit and
equipment with operation control

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Item
Model SRK19CIS SRC19CIS
Cooling capacity
(1)
W5200
Power source 1 Phase, 220V, 50Hz
Cooling input kW 1.49
Running current (Cooling) A 7.4
Inrush current A 33
COP Cooling: 3.49
Cooling Sound level Hi 45, Me 41, Lo 38 49
Noise level Power level dB 60 65
Exterior dimensions
Height Width Depth mm 318 1098 248 640 850
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290
Color Yellowish white Stucco white
Net weight kg 15 46
Refrigerant equipment
Compressor type & Q’ty –RH277VHST (Rotary type) 1
Motor kW –1.3
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 1.3 (Pre-Charged up to the piping length of 7m)
Refrigerant oil R0.52 (DIAMOND MS56)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan 1 Propeller fan 1
Motor W 46 43
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: ø6.35 (1/4") Gas line: ø15.88 (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
P
Recommended breaker size A 20
ower source supply Terminal block (Screw fixing type)
Size Core number 1.5 mm
2
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 SELECTION DATA
2.1 Specifications
Model SRK19CIS (Indoor unit)
SRC19CIS (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 220V.
(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 10g refrigerant per meter.
Operation data
(1) (2)
Refrigerant piping
Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection
The piping length is 7.5m.
(220V)

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Item
Model SRK25CIS SRC25CIS
Cooling capacity(1) W7000
Power source 1 Phase, 220V, 50Hz
Cooling input kW 2.04
Running current (Cooling) A 10.2
Inrush current A 45
COP Cooling: 3.43
Noise level Cooling Sound level dB Hi 46, Me 42, Lo 39 52
Power level 60 67
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 –2JS386D5CA02 (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: ø6.35 (1/4") Gas line: ø15.88 (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 mm24 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 SRK25CIS (Indoor unit)
SRC25CIS (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 220V.
(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 10g refrigerant per meter.
Operation data
(1) (2)
Refrigerant piping
Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection
The piping length is 7.5m.
(220V)
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Recommended breaker size A 20

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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
Refer to the selection chart
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 SRK19CIS, 25CIS
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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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
Model SRC19CIS
Model SRC25CIS
Unit: mm
Terminal block
Service valve (Gas)
Flare fitting ø15.88 (5/8")
Service valve (Liquid)
Flare fitting ø6.35 (1/4")
25.1165.5
30˚
30˚
48.5103.3
750
24.1
Drain holes
2-ø15 25.8
29.8
87.9880
150580150
61
532
223
60
15
340
61 47.5
19 380 19
418
Unit: mm

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2.4 Piping system
Model SRK19CIS
Model SRK25CIS
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
Muffler
Outdoor air
temp. sensor
Heat
exchanger
Heat exchanger
sensor
Compressor
Capillary tube
Strainer
accumulator
Sub
Accumulator
Service valve
(Gas)
Electronic
expansion valve
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
Muffler
Outdoor air
temp. sensor
Heat
exchanger
Heat exchanger
sensor
Compressor
Capillary tube
Strainer Strainer
accumulator
Sub
Accumulator
Service valve
(Gas)
Electronic
expansion valve
ø
15.88

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2.5 Selection chart
Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way.
Net capacity = Capacity shown on specification Correction factors as follows.
(1)Coefficient of cooling capacity in relation to temperatures
(2) Correction of cooling capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling capacity in relation to the one way piping length between the indoor and outdoor units.
14 16 18 20 22
15
20
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
43
24
ISO-T1 Standard ConditionIndoor air W.B. temperature ˚C W.B.
Cooling
Applicable range
Coefficient of cooling capacity in relation to temperature
Cooling operation
Outdoor air D.B.
temperature
˚C D.B.
Piping length [m]
Cooling
7
1.0
10
0.99
15
0.975
20
0.965
25
0.95
How to obtain the cooling capacity
Example : The net cooling capacity of the model SRK25CIS 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 = 7000 0.975 1.0 =6825 W
SRK25CIS Length 15m Factor by air
temperatures
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