Mitsubishi Electric MSZ-FA25VA User 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·····················31
11. PARTS LIST······················································35
12. RoHS PARTS LIST···········································39
13. OPTIONAL PARTS···········································42
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
NOTE:
This service manual describes technical data of the indoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
SERVICE MANUAL
Wireless type
Models
MSZ-FA25VA -
MSZ-FA25VA -
MSZ-FA25VA -
MSZ-FA35VA -
MSZ-FA35VA -
MSZ-FA35VA - E3
E2
E1
E3
E2
E1
No. OB371
REVISED EDITION-B
INDOOR UNIT
Outdoor unit service manual
MUZ-FA·VA(H) Series (OB372)
MXZ-A·VA Series (OB377)
MXZ-8A140VA1(OC316)
Revision:B
●model has been added.
● 9-2. Failure mode recall function has been
changed.
●RoHS PARTS LIST has been added.
E3
Please void OB371 REVISED EDITION-A.
OB371B--1qxp 06.5.10 2:00 PM Page 1

• model has been added.
•9-2. Failure mode recall function has been changed.
•RoHS PARTS LIST has been added.
E3
2
1TECHNICAL CHANGES
MSZ-A09YV - ➔MSZ-FA25VA -
MSZ-A12YV - ➔MSZ-FA35VA - E1E1
E1E1
12. PLASMA DEODORIZING/AIR PURIFYING filter units have been added.
13. i-see Sensor has been added.
(i-see control operation and AREA setting have been added.)
14. Air cleaning filer has been removed.
15. Signal of remote controller has been changed. (It is not available for the conventional models.)
16. Symbol on terminal block has been changed (to S1/S2/S3).
NOTE: Do not remove the vane motor from the motor unit.
Do not disassemble the horizontal vane motor unit.
11. Front panel driving motor unit which opens and closes the front panel has been added.
Front panel opening/closing
output gear
NOTE: Do not disassemble the front panel driving motor unit.
Generalized stepping motor
10. The vertical vane motor unit has been added.
An external gear is added to the generalized stepping motor.
The unit is structured so that the driving torque and stopping torque would increase.
Generalized stepping motor
NOTE: Do not remove the vane motor from the motor unit.
Do not disassemble the vertical vane motor unit.
1. Indication of capacity has been changed.(BTU base ➔kW base)
2. Controller method between indoor and outdoor has been changed.
3. Power supply method has been changed (change to supply from outdoor unit).
4. Power supply cord has been removed.
5. Indoor electronic control P.C. board has been changed.
6. Position of terminal block has been changed.
7. Indoor fan motor has been changed. ( AC ➔DC)
8. Indoor heat exchanger has been changed.
9. The horizontal vane motor unit has been changed.
An external gear is added to the generalized stepping motor.
The unit is structured so that the driving torque and stopping torque would increase.
• model has been added.
Color of BOX and CORNER BOX has been changed to white.
E2
Revision:A
Revision:B
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3
PART NAMES AND FUNCTIONS
2
MSZ-FA25VA
MSZ-FA35VA
Line flow fan
Air outlet
Vertical vane
Air inlet
Display section
Front panel
PLASMA DEODORIZING filter
Panel
Heat exchanger
Horizontal vane
Operation section
(When the front panel is opened)
Remote controller
POWER lamp
Remote control
receiving section
PLASMA AIR PURIFYING filter
Anti-mold air filter Fan guard
i-see Sensor
PLASMA/WASH lamp
AREA lamp
Emergency operation
switch
WASH reset switch
Auto front panel
When the unit starts operating, the
front panel opens automatically to
draw in air. When the unit stops
operating, the front panel closes
automatically.
AREA lamp indicate AREA setting
In AREA setting, the horizontal air flow
direction changes automatically according
to the detection of i-see Sensor which detects
the floor/ wall temperature to air-condition
the room evenly.
i-see control operation
i-see sensor constantly measure
floor/wall temperature to automatically
adjust to the set temperature by
estimating the temperature
actually perceived by a
person inside the room
("sensible temperature").
<Open> <Closed>
Auto front panel
MSZ-FA25VA- ➔ MSZ-FA25VA-
MSZ-FA35VA- ➔ MSZ-FA35VA-
1. Color of BOX and CORNER BOX has been changed to white.
E2E1
E2E1
1. The operation of thermo-off-unit has been changed. (When 2 or more indoor units are connected with a multi type outdoor
unit, and operated in heat mode.)
< , > Indoor fan operates with very Low speed or stops.
< > Indoor fan operates intermittently with very Low speed or stops.
E3
E2E1
MSZ-FA25VA- ➔ MSZ-FA25VA-
MSZ-FA35VA- ➔ MSZ-FA35VA- E3E2
E3E2
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4
ACCESSORIES
1
2
3
4
5
6
7
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)
1
5
1
2
2
1
1
ON-TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
VANE CONTROL button
(Horizontal vane button)
OFF-TIMER button
i-see button
(This diagram shows an overall view.)
Open the front lid.
PLASMA button
AREA button
RESET button
WIDE VANE button
(Vertical vane button)
Signal transmitting section
Operation display section
Temperature buttons
OPERATE/STOP
(ON/OFF) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
Indication of
remote controller
model is on back
MSZ-FA25VA
MSZ-FA35VA
REMOTE CONTROLLER
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5
SPECIFICATION
3
T3.15AL250V
NSEJ001DA1 12V DC 100"(at 25˚C)
MP20Z 12V DC 300"(at 25˚C)
MSBPC20M16 12V DC 250"(at 25˚C)
MSBPC20M11 12V DC 300"(at 25˚C)
ERZV14D471
A2TPMI334F0V50HSOBA060P5L1J4S 5V DC
3P
Item
Fuse
Front panel driving motor
i-see Sensor motor
Horizontal vane motor
Vertical vane motor
Varistor
i-see Sensor
Terminal block
(F11)
(MP)
(MT)
(MV1)
(MV2)
(NR11)
(RR)
(TB)
Specifications and rating conditions of main electric parts
MSZ-FA25VA MSZ-FA35VA
Indoor model
Function
Power supply Single phase
230V,50Hz
10
0.25
33
57
0.25
RC0J40-EB or RC0J30-CC
780O298O198
10
4
42
36/29/21
4
KM05A
Cooling
594
474/354/252
1,220
1,010/800/610
Heating
612
498/384/264
1,250
1,050/850/640
Single phase
230V,50Hz
10
0.25
33
57
0.25
RC0J40-EB or RC0J30-CC
780O298O198
10
4
42
36/29/22
4
KM05A
Cooling
594
474/354/258
1,220
1,010/800/630
Heating
612
498/384/276
1,250
1,050/850/660
Air flow(Super High)
Air flow(High/Med./Low)
Power outlet
Running current ✽1
Power input ✽1
Power factor ✽1
Fan motor current ✽1
Model
Dimensions WOHOD
Weight
Air direction
Sound level(Super High)
Sound level(High/Med./Low)
Fan speed(Super High)
Fan speed(High/Med./Low)
Fan speed regulator
Remote controller model
K/h
K/h
A
A
W
%
A
mm
kg
dB(A)
dB(A)
rpm
rpm
Electrical data
Fan motor
Special remarks
Capacity
MSZ-FA25VA MSZ-FA35VA
Indoor model
Function Cooling
546
450/348/252
1,130
960/790/610
Heating
540
420/372/264
1,120
910/830/640
Cooling
516/390/258
1,080/860/630
Heating
522/402/276
1,090/880/660
Air flow(Super High)
Air flow(High/Med./Low)
Sound level(Super High)
Sound level(High/Med./Low)
Fan speed(Super High)
Fan speed(High/Med./Low)
K/h
K/h
dB(A)
dB(A)
rpm
rpm
Special remarks
Capacity
42
36/29/21
642
42
36/29/22
1,300
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:
Outdoor Dry-bulb temperature 35:Wet-bulb temperature 24:
Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:
Outdoor Dry-bulb temperature 7:Wet-bulb temperature 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
When outdoor unit is MXZ-8A140VA1 type.
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6
4NOISE CRITERIA CURVES
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
42
42
SPL(dB(A)) LINE
Super 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
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
42
42
SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
MSZ-FA25VA MSZ-FA35VA
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7
OUTLINES AND DIMENSIONS
5
MSZ-FA25VA Unit : mm
780
155 155
335 320
41.5 215
42.5 214
3 287.5
7055
5555 225 225
298
90
106
or more7
100
198 5
53.5 102624.5
19
159
58
234 14273.5
Air in
Air out
Wall hole [65
Indoor unit
Installation plate
Installation plate
11o20 Oblong hole
11o26 Oblong hole
10 or more
75 or more
55 or morew
75 or more
wIn case of left, left back, or left under piping (using spacer), 113 or more
Insulation [28
Drain hose [16
(Connected part O.D)
Liquid line [6.35 - 0.5m
Gas line [9.52 - 0.43m
Insulation [35 O.D
[19 I.D
{
Required space (Indoor unit)
Wireless remote controller
MSZ-FA35VA
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8
6WIRING DIAGRAM
REFRIGERANT SYSTEM DIAGRAM
7
MSZ-FA25VA
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)
Unit : mm
SYMBOL
DB111
F11
MF
MP
MT
MV1
SYMBOL
MV2
NR11
PLASMA_A
PLASMA_D
RR
RT11
SYMBOL
RT12
RT13
T111
TB
NAME
DIODE STACK
FUSE (T3.15AL250V)
INDOOR FAN MOTOR
FRONT PANEL DRIVING MOTOR
i-see Sensor MOTOR
VANE MOTOR (HORIZONTAL)
NAME
VANE MOTOR (VERTICAL)
VARISTOR
PLASMAAIR PURIFYING FILTER UNIT
PLASMA DEODORIZING FILTER UNIT
i-see Sensor
ROOM TEMPERATURE THERMISTOR
NAME
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
TRANSFORMER
TERMINAL BLOCK
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-FA25VA
MSZ-FA35VA
MSZ-FA35VA
1
2
3
4
S2
8
230V~
BLU
INDOOR ELECTRONIC
CONTROL P.C. BOARD
33
PLASMA_DPLASMA_A
SAFETY DEVICE
(PLASMA UNIT)
MP
RR
54
MT
SW P.C.
BOARD
POWER MONITOR
RECEIVER P.C. BOARD
INTERLOCK
SWITCH(FAN)
55
MV2
MV1
TO OUTDOOR
UNIT
CONNECTING
BLK
RED
S3
TB TAB3
DB111
NR11
F11
5
6
4
2
5
CN
1U1
2
CN
1T2
CN
1T1
CN
110
3
LD
105(T)
LD
101(A)
12-24V
RT13
2
1R1
CN
GRN
LD104
CN201
2
1
151
CN
T111
RED
WHT
111
CN
CN
112
CN211 BLU
YLW
BLK
MF
RT11
RT12
1
3
5
S1
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9
SERVICE FUNCTIONS
8
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-FA25VA
MSZ-FA35VA
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 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 the RESET button.
NOTE : For remodelling, take out
the batteries and press the
OPERATE/STOP(ON/OFF)
button twice or 3 times at
first.
After finish remodelling,
put back the batteries then
press the RESET button.
J2
J1
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.)
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.
OB371B--1qxp 06.5.10 2:01 PM Page 9

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
cancelled.
• 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.
How to release “AUTO RESTART FUNCTION”
1Turn OFF the main power for the unit.
2Solder the Jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)
JR07
CN151 CN211CN112 CN1R1
CN212
CN1T1CN1T2
CN130
IC156
8-4. Remote controller
Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the
installed position of the indoor unit. If the switch is not set correctly, the air conditioner may not function properly.
Area Left Center Right
Position of
the slide
switch
Display on
the remote
controller
Where is the indoor unit installed in your room?
Installed at left , if the
distance is not more
than 50 cm.
NOTE:If the indoor unit is installed more than 50 cm away from the side walls, cabinets or other nearby objects, set the slide
switch to the “center” position.
Installed at right, if the
distance is not more
than 50 cm.
Is the indoor unit in-
stalledatright, left or
center?
(Left) (Center) (Right)
Side swich
OB371B--1qxp 06.5.10 2:01 PM Page 10