Mitsubishi Heavy Industries SRK13ZEV-S4 User manual

-T·054
INVERTER WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air to air heat pump type)
SRK13ZEV-S4
SRK22ZEV-S4
ROOM AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST

TECHNICAL MANUAL
1. SRK13ZEV-S4 .............................................................. 2
2. SRK22ZEV-S4 ............................................................ 60
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2
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CONTENTS
1.1 GENERAL INFORMATION......................................................................... 3
(1) Specific features ...................................................................................................... 3
(2) How to read the model name.................................................................................. 3
1.2 SELECTION DATA ..................................................................................... 4
(1) Specifications ......................................................................................................... 4
(2) Range of usage & limitations ................................................................................ 5
(3) Exterior dimensions ............................................................................................... 5
(4) Piping system ......................................................................................................... 6
(5) Selection chart ........................................................................................................ 7
1.3 ELECTRICAL DATA ................................................................................... 8
(1) Electrical wiring ...................................................................................................... 8
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .............. 9
(1) Operation control function by remote control switch ......................................... 9
(2) Unit ON/OFF button ................................................................................................10
(3) Power blackout auto restart function ...................................................................10
(4) Custom cord switching procedure .......................................................................11
(5) Flap control .............................................................................................................11
(6) Comfortable timer setting ......................................................................................12
(7) Outline of heating operation.................................................................................. 12
(8) Outline of cooling operation.................................................................................. 15
(9) Outline of dehumidifying operation ......................................................................16
(10) Outline of automatic operation .............................................................................19
(11) Outline of fan operation .........................................................................................19
(12) ION operation ..........................................................................................................20
(13) Protective control function ....................................................................................20
1.5 APPLICATION DATA .................................................................................. 25
(1) Selection of location for installation.....................................................................26
(2) Installation of indoor unit ......................................................................................27
(3) Installation of outdoor unit ....................................................................................30
(4) Refrigerant piping...................................................................................................30
(5) Test run ....................................................................................................................31
(6) Precautions for wireless remote control installation and operation .................32
1.6 MAINTENANCE DATA ............................................................................... 33
(1) Troubleshooting procedures for electrical equipment........................................33
(2) Servicing .................................................................................................................44
1.7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL
FOR AIR CONDITIONERS USING R410A ................................................ 45
(1) Outline .....................................................................................................................45
(2) Refrigerant piping installation...............................................................................46
(3) Installation, removal and servicing .......................................................................52
(4) Refrigerant recovery ..............................................................................................57
MODEL SRK13ZEV-S4

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3
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Over heat of compressor
Error of signal transmission
Outdoor fan motor error
1.1 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 equip-
ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
(a) 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, interlocked with the indoor and outdoor unit
fans controlled to change frequency, thus controlling the capacity.
¡Allowing quick heating/cooling operation during start-up period. Constant room temperature by fine-tuned control after the
unit has stabilized.
(b) Fuzzy control
¡Fuzzy control calculates the amount of variation in the difference between the return air temperature and the setting temperature
in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency.
(c) Remote control flap
The flap can be automatically controlled by operating wireless remote control.
¡Air scroll (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.
(d) 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.
Outdoor heat exchanger sensor
error
Discharge pipe sensor error
Outdoor air temperature sensor
error
2 time flash
4 time flash
RUN light
keeps flashing
1 time flash
OFF
OFF
OFF
Trouble of outdoor unit
Over current
Current cut
2 time flash
3 time flash
RUN light
ON
1 time flash
2 time flash
3 time flash
1 time flash
5 time flash 5 time flash
TIMER light Outdoor (LED)
Room temperature sensor error
Indoor fan motor error
Heat exchanger sensor error
2 time flash
6 time flash
TIMER light
ON
1 time flash
RUN light
Rotor lock
6 time flash 6 time flash
7 time flash ON
2 time flash 7 time flash
RUN light
2 time flash
(2) How to read the model name
Example : SR K 13 Z EV - S4
R410A models
Series No.
Inverter type
Product capacity
Wall mounted type
Split type room air-conditioner

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Item
Model SRK13ZEV-S4 SRC13ZEV-S4
Cooling capacity(1) W4000 (400~5000)
Heating capacity(1) W6000 (400~9000)
Power source 1 Phase, 220V, 50Hz
Cooling input kW 0.93 (0.105~1.5)
Running current (Cooling) A 5.5
Heating input kW 1.38 (0.095~2.490)
Running current (Heating) A 6.8
Inrush current A 6.8
COP Cooling: 4.30 Heating: 4.35
Noise level Cooling Sound level 46 47
Heating Sound level 46 47
Exterior dimensions
Height ×Width ×Depth mm 298 ×840 ×259 595 ×780 ×290
Color Cool white Stucco white
Net weight kg 12 39
Refrigerant equipment
Compressor type & Q’ty –5CS102XFA (Scroll type) ×1
Motor kW –1.1
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 1.35 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.36 (RB68A)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 33 34
(Cooling)
Air flow (at High) (Heating) CMM
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 light RUN (Green), TIMER (Yellow), JET/HI POWER (Green), ION (Green)
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: 0.54 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 (Allergen clear filter ×1, Natural enzyme filter ×1)
Optional parts –
Notes (1) The data are measured at the following conditions.
1.2 SELECTION DATA
(1) Specifications
Model SRK13ZEV-S4 (Indoor unit)
SRC13ZEV-S4 (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 220V 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, Heating overload protection (High pressure control), Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection, Cooling overload protection
The piping length is 7.5m.
(220V)

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(2) Range of usage & limitations
(3) Exterior dimensions
(a) Indoor unit
Model SRK13ZEV-S4
Indoor return air temperature
(Upper, lower limits)
Refrigerant line (one way) length Max. 25m
SRK13ZEV-S4
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
Model
Cooling operation : Approximately 21 to 32˚C
Heating operation : Approximately 15 to 30˚C
Cooling operation : Approximately 21 to 43˚C
Heating operation : Approximately
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5 to 21˚C
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 (ø9.52)
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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(b) Outdoor unit
Model SRC13ZEV-S4
(4) Piping system
Model SRK13ZEV-S4
Outdoor unitIndoor unit
Heat
exchanger
Room temp.
sensor
Humidity
sensor
Heat
exchanger
Heat
exchanger
Solenoid
valve
Flare connecting
Heat
exchanger
sensor
Piping
(Liquid)
ø6.35
Piping
(Gas)
ø9.52
Check joint
4 way valve
Service valve (Liquid)
Flare connecting
Discharge pipe
temp. sensor
Cooling cycle
Heating cycle Outdoor air
temp. sensor
Heat exchanger
sensor
Compressor
uffler
M
Capillary tube Capillary tube
Strainer
Service valve
(Gas)
Electronic
expansion valve
14.4
595
96.5 42.5
35°
35°
90.6 29.7
340
13.5
312.5
14
17.5
164
286.4
290
45.4
49.6
463
62780
106 510
12
50
Drain holes
2-16 ×12
Ground
terminal
Terminal block
Service valve (Liquid)
Service valve (Gas)
Flare connection ø6.35 (1/4")
Flare connection ø9.52 (3/8")
Unit: mm

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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 SRK13ZEV-S4 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 = 4000 ✕0.975 ✕1.0 =3900 W
SRK13ZEV-S4 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
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
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

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1.3 ELECTRICAL DATA (1) Electrical wiring
Model SRK13ZEV-S4
Outdoor unit
Indoor unit
Printed circuit
board
TB TB
F (250V 20A)
BK
WH
RD U
V
W
BK
C2 S.IN R.IN
Re
G
WH
RD
Th4
Th5
Th6
CNB
CNE
CNA
CND
1
2
3
NP
Power
transistor
20S
EEV
FMo
DS
CM
Black
Brown
Red
Blue
White
Yellow/Green
BK
BR
RD
BL
WH
Y/GN
Yellow
Y
Color symbol
Meaning of marks
Symbol Parts name
CM Compressor motor
FFuse
FM
I
F
Fan motor (Indoor)
FMo
F
an motor (Outdoor)
SM
RE
Flap motor
Reactor
Symbol Parts name
Th
1
Room temp. sensor
Th
2
Heat exchanger sensor (Indoor unit)
Th
3
Humidity sensor
Th
4
Heat exchanger sensor (Outdoor unit)
Th 5
Outdoor air temp. sensor
Th
6
Discharge temp. sensor
Symbol Parts name
20S 4 way valve (coil)
ZNR Varistor
52C Magnetic contactor
DS Diode stack
EEV Electronic expansion valve
SV Solenoid valve
ZNR
250V
3A
F
CNM Printed
circuit
board
JEM-ACNFCNE
1
2
3
52C3
CNG
SJ
52C
52C4
4CNU
1
RD
RD
3
WH
WH
BK
BK
BK
6
5
BL
BL
BR
BL
Y
CNL
CNV
CNN
T4
ION
generator
Safety switch
Display
Wireless R-Amp
Back-up switch
Y/G
G
SV
SM
Th1 Th2 Th3
HA
FM
I
Heat
exchanger
Power source
1 Phase
220V 50Hz
( )

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1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
(1) Operation control function by remote control switch
TEMP
SLEEP
ECONO
ACL
ON OFF
DRY MODE
AIR FLOW
CANCEL
ion
START
JET/
JET
ECONO
H
AM PM
ON
SLEEP
LO
MED
HI
AUTO
FAN SPEED MODE
TIME
SET UP
TIMER
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.
ION button
This button selects ION operation.
ON/OFF button
Press for starting operation, press again for
stopping.
JET/HI POWER button
This button changes the JET/HI POWER mode .DRY MODE button
This button changes the DRY mode.
RESET switch
Switch for resetting microcomputer.
SLEEP button
This button selects SLEEP operation.
ECONO switch
This switch changes the ECONOMY mode.
TIME SET UP switch
This switch for setting the TIME.
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
SLEEP timer.
JET
ECONO
H
AM PM
ON
SLEEP
LO
MED
HI
AUTO
OPERATION MODE indicator
Indicates selected operation with lamp.
[ (Auto) • (Cool) • (Heat) • (Dry) • (Fan)]
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.
ECONOMY MODE indicator
Indicates during economy mode operation.
SLEEP indicator
Indicates during SLEEP operation.
ON TIMER indicator
Indicates during ON TIMER operation.
HI POWER MODE indicator
Indicates during Hi power mode operation.
Time indicator
Indicates present time or timer setting time.
DRY MODE indicator
Shows the various DRY modes.
START button
This button selects ON TIMER operation.
(Air scroll) (Flap stopped)
AIR FLOW button
This button changes the flap mode. When
pressed, this button changes the mode in the
following order:
AIR FLOW indicator
Shows selected flap mode.
SIndication section
Model SRK13ZEV-S4
Remote control
SOperation section