Mitsubishi Electric MSZ-CA25VB User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM················8
8. SERVICE FUNCTIONS ······································9
9. TROUBLESHOOTING······································11
10. DISASSEMBLY INSTRUCTIONS·····················22
11. PARTS LIST······················································24
Wireless type
Models
MSZ-CA25VB - (WH)
MSZ-CA35VB - (WH)
E1
E1
No. OB390
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
MSZ-CA25VB -
MSZ-CA35VB - E1
E1
NOTE:
This service manual describes technical data of the indoor units.
•As for outdoor units MUZ-CA25VB- and MUZ-CA35VB- , refer to the service manual
OB391.
•As for outdoor units MXZ-A14WV- and MXZ-A18WV- , refer to the service manual
OB319. E1E1
E1E1
Indication of
model name
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2
1TECHNICAL CHANGE
MSZ-A09YV - ➔MSZ-CA25VB -
MSZ-A12YV - ➔MSZ-CA35VB - E1E1
E1E1
1. Indication of capacity has been changed.(BTU➔kW)
2. Shape of front panel has been changed.(Dimension has been changed)
3. Indoor electronic control P.C. board has been changed.
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3
2PART NAMES AND FUNCTIONS
ACCESSORIES
1
2
3
4
5
6
7
8
Installation plate
Installation plate fixing screw 4 o25 mm
Remote controller holder
Fixing screw for 33.5 o1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
Air cleaning filter
MSZ-CA25VB - E1
MSZ-CA35VB - E1
1
7
1
2
2
1
1
2
INDOOR UNIT
INDOOR UNIT
MSZ-CA25VB -
MSZ-CA35VB - E1
E1
Emergency operation switch
Operation section
Horizontal vane
Air filter
Air outlet
Vertical vane
Air inlet
to Breaker
Remote control
receiving section
Remote controller
Display section
(When the front panel is opened)
Operation indicator lamp
Receiving section
Air cleaning filter
(White bellows type)
Power supply cord
Panel
Front panel
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4
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
AMPM
CLOCK
˚C
AM
RESET CLOCK
I FEEL
COOL
DRY
AUTO
HEAT
Open the front lid.
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF) button
TEMPERATURE buttons
OPERATION SELECT button
FAN SPEED CONTROL button
OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button
ECONO COOL button
VANE CONTROL button
CLOCK SET button
Indication of remote controller model
(back side)
MSZ-CA25VB -
MSZ-CA35VB - E1
E1
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5
1.5+ 440V
250V 3.15A
93:5A 250V
MSBPC20 12V 250"
ERZV10D471
S201DH1Y
5P
JM1aN-ZTMP-DC12V
136:i3: 2A
INDOOR UNIT
Item Model
Indoor fan capacitor
Fuse
Thermal fuse
Vane motor
Varistor
Solid state relay
Terminal block
Contactor
Indoor fan motor thermal fuse
MSZ-CA25VB - E1 MSZ-CA35VB - E1
(C11)
(F11)
(F12)
(MV)
(NR11)
(SR141)
(TB)
(52C)
Specifications and rating conditions of main electric parts
3SPECIFICATION
MSZ-CA25VB - E1 MSZ-CA35VB - E1
Indoor model
Function
Power supply Single phase
230V,50Hz
10
0.17
35
—
0.17
RC4V19-LA
WHT-BLK 413
BLK-RED 334
815O278O217
9
5
3
10
10
10
KM04G
Cooling
504/360
W /222 W
88
37/29 W /21 W
930/730 W /530 W
Heating
564/402
W /246 W
94
38/30 W /21 W
1,020/790 W /570 W
Single phase
230V,50Hz
10
0.19
40
—
0.19
RC4V19-KA
WHT-BLK 316
BLK-RED 299
815O278O217
10
5
3
10
10
10
KM04G
Cooling
630/462
W /288 W
95
39/31 W /22 W
990/780 W /560 W
Heating
642/474 W /312 W
94
38/30
W /22 W
1,000/790 W /590 W
Air flow (High/Med.W/LowW)
Power outlet
Running current ✽1
Power input ✽1
Auxiliary heater
Power factor ✽1
Fan motor current ✽1
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level (High/Med.W/LowW)
Fan speed(High/Med.W/LowW)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
Thermistor RT13(at25:)
Remote controller model
K/h
A
A
W
A(kW)
%
A
"
mm
kg
dB(A)
rpm
k"
k"
k"
Electrical data
Fan motor
Special remarks
Capacity
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor DB27:WB19:
Outdoor DB35:WB 24:
Heating : Indoor DB 20:WB15:
Outdoor DB 7:WB 6:
Refrigerant piping length (one way): 5m
wReference value
✽1 Measured under rated operating frequency.
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6
NOISE CRITERIA CURVES
4
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
37
38
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
MSZ-CA25VB - E1
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
39
38
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
INDOORUNIT WALL
MICROPHONE
0.8m
1m
MSZ-CA35VB - E1
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7
5OUTLINES AND DIMENSIONS
MSZ-CA25VB - E1
MSC-CA35VB - E1
INDOOR UNIT
INDOOR UNIT
217
215
81.5
81.5
41
2.5
42
271
231.5
4.5
81.5 133.5
326326
159
19
58
5
7 or more
90
110
30
149
606
278
60
815
783
Wall hole [65
Indoor unit
Installation plate
Installation plate
Insulation [28
Drain hose [16
(Connected part O.D)
Air in
Air out
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
Wireless remote controller
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
{
217
215
218.5
258
81.581.5
41
42
2.5
17.5
161.5
161.5
326326
159
19
58
5
7 or more
90
110
30
149
606
278
60
815
783 Indoor unit
Installation plate
Wall hole [65
Installation plate
Insulation [28
Drain hose [16
(Connected part O.D)
Air in
Air out
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
Wireless remote controller
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
{
Unit: mm
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8
WIRING DIAGRAM
6
REFRIGERANT SYSTEM DIAGRAM
7
MSZ-CA25VB - E1
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant flow in cooling
Refrigerant flow in heating
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
Indoor coil
thermistor
RT12(main)
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
Indoor coil
thermistor
RT12(main)
INDOOR UNIT
Unit:mm
INDOOR UNIT MODELS WIRING DIAGRAM
SYMBOL
C11
F11
F12
MF
MV
SYMBOL
NR11
RT11
RT12
RT13
SR141
SYMBOL
SR142
T11
TB
52C
NAME
INDOOR FAN CAPACITOR
FUSE (3.15A)
THERMAL FUSE (93:)
INDOOR FAN MOTOR (INNER FUSE)
VANE MOTOR
NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
SOLID STATE RELAY
NAME
SOLID STATE RELAY
TRANSFORMER
TERMINAL BLOCK
CONTACTOR
GRN/YLW
BLK
GRY
YLW
BRN
WHT
RED
MF
1
2
3
4
5
6
3
SR141 SR142
5
3
1
C11
RT13
RT12
CN
112
CN
111
CN
121
151
CN
109
CN
125
CN
1R1
CN
MV
5 2 3 2
5
RT11
CN211
NR11
ELECTRONIC CONTROL P.C. BOARD
F11
T11
230V~
BRN
BRN
TB
L
3
N
2
RED
WHT
BLU F12 BLU
BLU 1
2BLU 1
2
3
CN201 3
4
52C
12V
TO OUTDOOR
UNIT
CONNECTING
L
3
N
2
12V
TO OUTDOOR
FOR MXZ type
UNIT
CONNECTING REMOTE
CONTROLLER
POWER MONITOR
RECEIVER
SAFETY
DEVICE (FAN)
P.C. BOARD
LD103
GRN
CIRCUIT BREAKER
POWER
SUPPLY
CORD
~/N 230V
50Hz
PE
BLU
GRN/YLW
NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
MSZ-CA25VB -
MSZ-CA35VB - E1
E1
MSZ-CA35VB - E1
INDOOR UNIT
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9
8SERVICE FUNCTIONS
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
Set time : 1-minute ➔ 1-second
Set time : 3-minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by short circuit of JPG and JPS.)
MSZ-CA25VB -
MSZ-CA35VB - E1
E1
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
1 unit operation
No modification
–
–
–
2 units operation
Same as at left
Solder J1
–
–
3 units operation
Same as at left
Same as at left
Solder J2
–
4 units operation
Same as at left
Same as at left
Same as at left
Solder both J1 and J2
Table 1
How to set the remote controller exclusively for particular indoor unit.
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote
controller for the indoor unit.
The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are
set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below :
The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table
1.
After modification, press RESET button.
NOTE : For remodelling, take out
the batteries and press
OPERATE/STOP(ON/OFF)
button twice or 3 times at
first.
After finish remodelling,
put back the batteries then
press RESET button.
Remote controller model : KM04G
J2
J1
8-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed
are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment
power has restored after power failure. Then, the unit will restart automatically.
However if the unit is operated in “I FEEL CONTROL” mode before power failure,
the operation is not memorized. In “I FEEL CONTROL” mode, the operation is decided by the initial room temperature.
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10
NOTE:
• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-
celled.
• If the unit has been off with the remote controller before power failure, the auto restart function does not works as the
power button of the remote controller is off.
• To prevent breaker off due to the rush of starting current, systematize other home appliance not to turn on at the same
time.
• When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding to the system that allows the units to start one by one.
Operation
1If the main power has been cut, the operation settings remain.
2After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3 minutes
for the compressor to start running.)
How to release “AUTO RESTART FUNCTION”
1Turn off the main power for the unit.
2Pull out the indoor electronic control P.C. board and the power monitor receiver P.C.board. (Refer to 10-1.2.)
3Solder the Jumper wire to JR07 on the indoor electronic control P.C.board. (Refer to 9-7.)
JR07
IC101
CN151
SW1
CN112
CN111
CN201
52C
C11
CN211
CN1V1
CN1R1CN121
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