Mitsubishi Electric MUZ-A09YVH-E1 Service manual

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Page 1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
No. OB327
SERVICE MANUAL
Wireless type
Models
MSZ-A09YV MSZ-A12YV -
E1
(WH)
E1
(WH)
CONTENTS
Indication of model name
MSZ-A09YV - E1
MSZ-A12YV - E1
1. PART NAMES AND FUNCTIONS······················2
2. SPECIFICATION·················································4
3. NOISE CRITERIA CURVES ·······························5
4. OUTLINES AND DIMENSIONS ·························6
5. WIRING DIAGRAM ············································7
6. REFRIGERANT SYSTEM DIAGRAM ················7
7. SERVICE FUNCTIONS ······································8
8. TROUBLESHOOTING······································10
9. DISASSEMBLY INSTRUCTIONS ····················19
10. PARTS LIST······················································21
11. OPTIONAL PARTS ···········································23
NOTE:
This service manual describes technical data of the indoor units.
•Refer to the service manual OB328 when MSZ-A09YV- E1 or MSZ-A12YV- E1 is connected
with MUZ-A09YV- E1 , MUZ-A12YV- E1 , MUZ-A09YVH- E1 or MUZ-A12YVH- E1 .
•Refer to the service manual OB319 when MSZ-A09YV- E1 or MSZ-A12YV- E1 is connected
with MXZ-A18WV- E1 , MXZ-A26WV- E1 or MXZ-A32WV- E1 as multi system units.
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PART NAMES AND FUNCTIONS
INDOOR UNIT
MSZ-A09YV - E1
MSZ-A12YV - E1
Front panel
Air cleaning filter
(white bellows type)
Air inlet
Heat exchanger
to Breaker
Panel
Catechin air filter
(With deodorizer)
Power supply cord
Remote control
receiving section
Air outlet
Vertical vanes
Line flow fan
Remote controller
Horizontal vane
Display section
Operation section
(When the front panel is opened)
Operation indicator lamp
Emergency operation switch
Remote control
receiving section
ACCESSORIES
INDOOR UNIT
MSZ-A09YV MSZ-A12YV 1
Installation plate
1
2
Installation plate fixing screw 4 o 25 mm
5
3
Remote controller holder
1
4
Fixing screw for 3 3.5 o 1.6 mm (Black)
2
5
Battery (AAA) for remote controller
2
6
Wireless remote controller
1
7
Felt tape (Used for left or left-rear piping)
1
2
E1
E1
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MSZ-A09YV - E1
MSZ-A12YV - E1
Signal transmitting section
Operation display section
PM
AM
OPERATE /STOP
(ON /OFF) button
TOO
ON/OFF WARM
TOO
COOL
TEMPERATURE buttons
Indication of remote controller model
Open the front lid.
˚C
CLOCK
AMPM
AM
TOO
ON/OFF WARM
TOO
COOL
FAN SPEED CONTROL button
VANE CONTROL button
FAN
STOP
VANE
START
OFF-TIMER button
I FEEL
HEAT
DRY
AUTO
ON-TIMER button
COOL
MODE
HR.
ECONO COOL
MIN.
OPERATION SELECT button
ECONO COOL button
HR. button
MIN. button
(TIME SET button)
RESET CLOCK
CLOCK SET button
RESET button
3
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Page 4
SPECIFICATION
Indoor model
MSZ-A09YV -
Function
MSZ-A12YV -
E1
Cooling
Cooling
Power supply
Special
remarks
Fan
motor
Electrical
data
Capacity Air flow(High/Med.W/LowW) K /h
Power outlet
A
Running current ✽1
A
Power input Rated frequency
W
Auxiliary heater
A(kW)
Power factor ✽1
%
Fan motor current ✽1
A
Model
Winding
"
resistance(at20:)
Dimensions WOHOD
mm
Weight
kg
Air direction
Sound level(High/Med.W/LowW) dB(A)
Fan speed(High/Med.W/LowW) rpm
Fan speed regulator
Thermistor RT11(at25:)
k"
Thermistor RT12(at25:)
k"
Thermistor RT13(at25:)
k"
Remote controller model
Heating
Single phase
230V,50Hz
504/360W/222W
564/402W/246W
10
0.17
35
—
88
94
0.17
RC4V19-LA
Heating
Single phase
230V,50Hz
630/462W/288W
642/474W/312W
10
0.19
40
—
95
94
0.19
RC4V19-KA
WHT-BLK 413
BLK-RED 334
815O278O244
9
5
37/29W/21W
38/30W/21W
1,010/770W/540W
1,110/840W/580W
3
10
10
10
KG04A
WHT-BLK 316
BLK-RED 299
815O278O244
10
5
39/31W/22W
38/30W/22W
1,030/800W/570W
1,050/820W/600W
3
10
10
10
KG04A
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
w Reference value
✽1 Measured under rated operating frequency.
Specifications and rating conditions of main electric parts
INDOOR UNIT
Item
Model
MSZ-A09YV -
E1
MSZ-A12YV -
Indoor fan capacitor
(C11)
1.5+ 440V
Fuse
(F11)
250V 3.15A
Thermal fuse
(F12)
93:5A 250V
Vane motor
(MV)
MSBPC20 12V 250"
Varistor
Solid state relay
(NR11)
ERZV10D471
(SR141)
S201DH1Y
Terminal block
Contactor
E1
(TB)
5P
(52C)
JM1aN-ZTMP-DC12V
Indoor fan motor thermal fuse
136:i3: 2A
4
E1
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NOISE CRITERIA CURVES
MSZ-A09YV - E1
MSZ-A12YV - E1
FAN SPEED FUNCTION
High
SPL(dB(A))
COOLING
37
HEATING
38
FAN SPEED FUNCTION
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
HEATING
38
LINE
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
90
80
10
39
High
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
90
20
SPL(dB(A))
COOLING
4000
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
BAND CENTER FREQUENCIES, Hz
BAND CENTER FREQUENCIES, Hz
INDOORUNIT
WALL
1m
0.8m
MICROPHONE
5
8000
Page 6
OUTLINES AND DIMENSIONS
INDOOR UNIT
81.5
783
133.5
41
2.5
231.5
Installation
plate
Indoor unit
815
81.5
326
326
4.5
Unit : mm
MSZ-A09YV - E1
271
4
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81.5
Wall hole [65
149
606
58
19
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
162
Installation plate
{
90
30
60
5
7 or more
278
242
Air in
110
Air out
244
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
Drain hose [16
(Connected part O,D)
Insulation [28
Wireless remote controller
Unit : mm
161.5
815
2.5
41
Indoor
unit
81.5
326
19
Installation plate
{
Power supply cord
Lead to right 1.0m
Lead to left 0.3m
90
30
162
58
Air out
Wireless remote controller
6
Wall hole [65
5
7 or more
278
149
606
81.5
326
242
Air in
110
244
42
218.5
Installation
plate
783
60
17.5
161.5
INDOOR UNIT
258
MSZ-A12YV - E1
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
Drain hose [16
(Connected part O,D)
Insulation [28
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WIRING DIAGRAM
MSZ-A09YV - E1
MSZ-A12YV - E1
INDOOR UNIT
TO OUTDOOR
TB
UNIT
L
CONNECTING
12V
MODELS WIRING DIAGRAM
BRN
3
RED
N
BLU
F12
BLU
1
BLU
230V~
2
BLU
2
WHT
52C
GRN
GRN/YLW
CN
109
CN
125
3
5
2
L
12V
TO OUTDOOR
UNIT
CONNECTING
3
CN
121
SR141 SR142
BLK
GRY
1
2
3
MF
BRN
4
WHT
5
RED
6
YLW
1
3
5
CN211
ELECTRONIC CONTROL P.C. BOARD
2
5
POWER MONITOR
FOR MXZ type
PE
NR11
F11
CN
1R1
RT11
3
4
C11
CN
151
RT12
CN
111
T11
CN201
3
2
1
LD103
POWER
SUPPLY
CORD
~/N 230V
50Hz
RT13
CN
112
3
N
MV
SAFETY
RECEIVER
DEVICE (FAN)
P.C. BOARD
REMOTE
CONTROLLER
2
CIRCUIT BREAKER
SYMBOL
C11
F11
F12
MF
MV
SYMBOL
NAME
NAME
NAME
SYMBOL
INDOOR FAN CAPACITOR
NR11 VARISTOR
SR142 SOLID STATE RELAY
FUSE (3.15A)
RT11 ROOM TEMPERATURE THERMISTOR
TRANSFORMER
T11
THERMAL FUSE (93:)
RT12 INDOOR COIL THERMISTOR (MAIN)
TERMINAL BLOCK
TB
INDOOR FAN MOTOR (INNER FUSE) RT13 INDOOR COIL THERMISTOR (SUB)
52C
CONTACTOR
VANE MOTOR
SR141 SOLID STATE RELAY
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
6
REFRIGERANT SYSTEM DIAGRAM
MSZ-A09YV - E1
MSZ-A12YV - E1
INDOOR UNIT
Indoor
heat
exchanger
INDOOR UNIT
Refrigerant pipe [9.52
(with heat insulator)
Indoor coil
thermistor
RT12(main)
Indoor
heat
exchanger
Flared connection
Indoor coil
thermistor
RT13(sub)
Refrigerant pipe [9.52
(with heat insulator)
Flared connection
Indoor coil
thermistor
RT13(sub)
Room temperature
thermistor
RT11
Room temperature
thermistor
RT11
Flared connection
Refrigerant flow in cooling
Refrigerant flow in heating
Indoor coil
thermistor
RT12(main)
Unit:mm
Flared connection
Refrigerant pipe
[6.35
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
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Page 8
SERVICE FUNCTIONS
MSZ-A09YV - E1
MSZ-A12YV - E1
7-1. 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 page 18.)
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.)
7-2. 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.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below :
Remote controller model : KG04A
J2
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.
J1
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.
Table 1
1 unit operation
2 units operation
3 units operation
4 units operation
No. 1 unit
No modification
Same as at left
Same as at left
Same as at left
No. 2 unit
–
Solder J1
Same as at left
Same as at left
No. 3 unit
–
–
Solder J2
Same as at left
No. 4 unit
–
–
–
Solder both J1 and J2
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.
7-3. 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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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 page 19.)
3Solder the Jumper wire to the JR07 on the indoor electronic control P.C.board. (Refer to page 18.)
1
C1
CN1V1 CN111
IC101
1 CN1R1 CN121 CN112
21
N
CN201
C
52C
SW1
CN151
JR07
Operation
1 If the main power (230V AC) has been cut, the operation settings remain.
2 After 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.)
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.
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TROUBLESHOOTING
MSZ-A09YV - E1
MSZ-A12YV - E1
8-1. Cautions on troubleshooting
1. Before troubleshooting, check the following:
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for mis-wiring.
2. Take care the following during servicing.
1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then after
confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.
2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the
electronic control P.C. board.
3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Housing point
Lead wiring
3. Troubleshooting procedure
1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.
2) Before servicing check that the connector and terminal are connected properly.
3) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the
components for bursting and discoloration.
4) When troubleshooting, refer to the flow chart on page 12 and the check table on page 13.
4. How to replace batteries
Weak batteries may cause the remote controller malfunction.
In this case, replace the batteries to operate the remote controller normally.
2 Press the RESET button with tip end of ball point
pen or the like, and then use the remote controller.
1 Remove the front lid and insert batteries.
Then reattach the front lid.
Insert the negative pole
of the batteries first.
Check if the polarity of
the batteries are correct.
RESET button
NOTE : 1. If the RESET button is not pressed, the remote controller may not operate correctly.
2. This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced.
This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by
the battery replacement.
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5. How to install the horizontal vanes
If horizontal vanes are not installed correctly, both of the operation indicator lamps will flash.
In this case, install the horizontal vanes correctly by following the procedures 1 to 6.
NOTE: Before installation of the horizontal vanes, disconnect the power supply plug and/ or turn off the breaker.
Upper vane
Insert this end first.
6
Stopper
5
Stopper
4
Insert.
In.
Lock.
Lock.
Upper right
The holes on the
insertion ends of
the upper and lower
horizontal vanes
different shapes.
Lower vane
Insert this end first.
3
2
1
Lower right
Insert.
Lock.
Lock.
In.
In procedures 2,3,5, and 6, lock the stoppers until they click into place.
INFORMATION FOR MULTI SYSTEM AIR CONDITIONER
OUTDOOR UNIT : MXZ series
Multi system air conditioner can connect two or more indoor units with one outdoor unit.
•Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not
connect indoor units beyond the outdoor unit capacity.
Operation indicator lamp flashes as shown in the figure below.
•When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and
the other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor
units will start the operation later cannot operate, indicating as shown in the figure below. In this case, please
set all the indoor units to the same operation mode.
Operation Indicator
Lighted
Flashing
•When indoor units starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max. 10 minutes) to blow out the warm air.
•In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant
flowing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.
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Page 12
8-2. Instruction of troubleshooting
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
operates in
only Test Run
operation.
Check room
temperature
thermistor.
Refer to
"Test point
diagram and
voltage" on
page 18.
Outdoor unit
doesn't
operate
even in
Test Run
operation.
Refer to
"Check of
inverter/
compressor".
Indoor unit
doesn't receive
the signal from
remote controller.
OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.
Unit doesn't
operate
normal
operation in
COOL or
HEAT mode.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Refer to
"Check of
R.V. coil".
Refer to B
"Check of
remote controller
and receiver
P.C. board"
on page 15.
1. Check indoor / outdoor
connecting wire.
(Check if the power
is supplied to the
indoor unit.)
2. Refer to C
"Check of indoor
electronic control
P.C. board"
on page 15.
Both lamps
(Left and right)
Flash on and off
at 0.5-second
intervals
Cause:
Indoor unit
• The horizontal
vanes are not
installed
correctly.
Left lamp
Flash on and
off at
0.5-second
intervals
Cause:
Indoor/
Outdoor unit
• Mis-wiring
Left lamp
2-time flash
Cause:
Indoor unit
• Trouble of
room temperature/
indoor coil
thermistor
Refer to E
"Check of
installation of
the horizontal
vanes" on
page 17.
Refer to D
"How to
check of
mis-wiring
(When
outdoor unit
doesn't work)"
on page 16.
Check room
temperature
thermistor
and indoor
coil thermistor.
Refer to
"Test point
diagram and
voltage"
on page 18.
Left lamp
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor
Refer to A
"Check of
indoor fan
motor"
on page 14.
Left lamp
4-time flash
Cause:
Indoor unit
• Trouble of
indoor unit
control
system
Replace the
indoor
electronic
control
P.C. board.
12
As for outdoor unit, refer to
service manual OB328 or OB319.
Left lamp
5-time flash
Cause:
Outdoor unit
• Outdoor
power
system
abnormality
Left lamp
6-time flash
Cause:
Outdoor unit
• Trouble of
thermistor
in outdoor
unit
Left lamp
7-time flash
Cause:
Outdoor unit
• Trouble of
outdoor
control
system
Refer to
"Check of
inverter/
compressor".
Refer to
"Check of
outdoor
thermistor".
Replace the
inverter P.C.
board and
others.
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Page 13
1. Troubleshooting check table
• The following indication applies regardless of shape of the indicator.
flashing
· Flashing of the OPERATION INDICATOR lamp (on the left or both)
Operation Indicator
indicates possible abnormalities.
· The OPERATION INDICATOR lamp (on the left) is
lighting during normal operation.
NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
Self check table
No.
Abnormal
point
Operation indicator lamp
Symptom
Detection method
Both lamps flash at the same time.
Attachment
0.5-second ON
of the
horizontal
vane
0.5-second OFF
Indoor unit
and outdoor
unit do not
operate.
When the electricity is not conducted to the
safety device (FAN) of the horizontal vane.
• Refer to E "Check of
installation of the horizontal
vanes" on page 17.
Outdoor unit
does not
operate.
3 minutes after power supply turns ON, when
serial signal is not received.
• Refer to D "How to check
mis-wiring " on page 16.
Outdoor unit
does not
operate.
Detect Indoor coil/room temperature
thermistor short or open circuit every 8
seconds during operation.
• Refer to the characteristics of
indoor coil thermistor,
sub indoor coil
thermistor, and room
temperature thermistor on
page 18.
Indoor fan
repeats 12
seconds ON
and 3
minutes
OFF.
When the
indoor fan
breaks, the
fan keeps
stopping.
When rotational frequency feedback signal is
not emit during 12-second indoor fan
operation.
• Refer to A "Check of
indoor fan motor" on page 14.
Outdoor unit
does not
operate.
When it cannot properly read data in the
nonvolatile memory of indoor electronic
control P.C. board.
• Replace the indoor electronic
control P.C. board.
Outdoor unit
does not
operate.
When compressor has stopped due to over
current protection or start-up failure protection
3 times in a row within 5 seconds after startup.
• Refer to "Check of inverter/
compressor".
Refer to service manual
OB328 or OB319.
Outdoor unit
does not
operate.
<Thermistor short>
Thermistors are abnormal when they short
after compressor start-up.
<Thermistor open>
Thermistors are abnormal when they open
after compressor start-up.
However, discharge temperature thermistor is
abnormal when open circuit is detected more
than 10 minutes after compressor start-up.
• Shortage of refrigerant
• Replace the outdoor control
P.C. board.
Refer to "Check of outdoor
thermistor".
Refer to service manual
OB328 or OB319.
Check point
1
Left lamp flashes.
0.5-second ON
Mis-Wiring
0.5-second OFF
Indoor coil
thermistor
w2 Room
temperature
thermistor
Left lamp flashes.
2-time flash
2.5-second OFF
Left lamp flashes.
3-time flash
w3
Indoor fan
motor
2.5-second OFF
4
Indoor
control
system
Left lamp flashes.
4-time flash
2.5-second OFF
5
Outdoor
power
system
Left lamp flashes.
5-time flash
2.5-second OFF
Left lamp flashes.
6-time flash
6
Outdoor
thermistors
2.5-second OFF
7
Outdoor
control
system
Left lamp flashes.
7-time flash
Outdoor unit
does not
operate.
When it cannot properly read data in the
nonvolatile memory of outdoor electronic
control P.C. board.
• Replace the outdoor
electronic control P.C. board or
inverter P.C. bpard.
Refer to service manual
OB328 or OB319.
Outdoor unit
operates but
indoor unit
does not
operate.
When the operation mode of each indoor unit
is differently set to COOL(includes DRY) and
HEAT at same time, the operation mode of
indoor unit that has operated at first has the
priority.
• Unify the operation mode.
Refer to service manual
OB319.
2.5-second OFF
Both lamp
MXZ type
Operation
8 mode
setting
Operation Indicator
Lighted
Flashing
2.5-second OFF
NOTE : w When the indoor unit has started operation and the above detection method has detected an abnormality (the first
detection after the power ON), the indoor electronic control P.C. board turns OFF the 52C and the indoor fan motor
with the OPERATION INDICATOR lamp lighting.
When the 52C and the indoor fan motor are turned ON again 3 minutes later and the same abnormality is detected
(a second detection of the above abnormality after the power ON), the indoor electronic control P.C. board turns
OFF the 52C and the indoor fan motor with the OPERATION INDICATOR lamp flashing.
However, the first detection is cleared in case the power is turned OFF after the first detection.
13
OB327 --1qxp
04.1.8 1:42 PM
Page 14
2. Trouble criterion of main parts
MSZ-A12YV - E1
Check method and criterion
Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)
Normal
8 k" ~ 20 k"
Motor part
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))
Indoor fan motor(MF)
Vane
motor(MV)
Abnormal
Open or short-circuit
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
Color of lead wire
WHT – BLK
BLK – RED
Normal
MSZ-A09YV
MSZ-A12YV
303 " ~ 329 " 396 " ~ 430 "
287 " ~ 311 " 320 " ~ 348 "
Abnormal
MAIN
Open or
short-circuit
Color of lead wire
BRN – YLW
YLW – GRY
Normal
4.5 ~ 5.5V
(When fan revolved one time)
0V➔5V➔0V
(Approx.)
Abnormal
Remain 0V or 5V
RED
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of lead wire
BRN-other one
ROTOR
YLW
BRN
Abnormal
Open or short-circuit
Normal
240 " ~ 260 "
ORN
When OPERATION INDICATOR lamp flashes 3-time.
Indoor fan does not operate.
A Check of indoor fan motor
Replace the
indoor fan motor.
Turn OFF the
power supply and
check the connector
CN 211 visually.
AUX.
FUSE
Measure the voltage power ON.
Sensor part
INNER FUSE
136i 3: CUT OFF
Figure
Disconnect connector from
CN 211 on indoor electronic
control P.C. board.
Measure resistance
between lead wire 1 and 5
and then 3 and 5.
Yes(0 or ∞)
Is resistance
0"(short circuit) or
∞(open circuit)?
No(others)
Replace the
indoor
electronic
control P.C.
board.
CN211
Indoor electronic
control P.C. board
1
3
5
Fan
motor
14
WHT
Part name
Room temperature
thermistor(RT11)
BLK
BRN
YLW
GRY
RED
MSZ-A09YV - E1
GRN
OB327 --1qxp
04.1.8 1:42 PM
Page 15
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller.
B Check of remote controller and receiver P.C. board
wCheck if the remote controller is exclusive for this air conditioner.
Switch on the remote controller.
No
Is LCD display on the the remote
controller visible?
Indoor electronic control
P.C. board
3
1
1 2
CN109
CN125
Replace the batteries.(Refer to page 10.)
(not clear)
Yes
Power monitor
receiver P.C.
board
Remove the batteries, then set them back
and press the RESET button. (Refer to
page 10.) Check if the unit operates with
the remote controller.
No
Does the unit operate with the
remote controller?
12543
CN302
Remote
controller
Turn on a radio to AM and press switch on
the remote controller.
Yes
No
Replace the remote controller.
Is noise heard from radio?
OK
Yes
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 1m?
Yes
● Reinstall the unit away from lights.
● Attach a filter on receiving part.
No
Measure the voltage between receiver P.C. board connector CN302 No.3(-) and No.5(+) when the remote
controller button is pressed.
Yes
Replace the indoor electronic control P.C.
board.
Is the voltage approx. 4V DC?
No(5V or 0V DC)
Replace the receiver P.C. board.
The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
C Check of indoor electronic control P.C. board
Check both “parts side” and “pattern side” of indoor
electronic control P.C. board visually.
Varistor (NR11)
Turn OFF the power supply.
Disconnect indoor fan motor connector CN211 and
vane motor connector CN151 from the indoor electronic
control P.C. board and turn ON the power supply.
Indoor electronic
control P.C. board
Fuse (F11)
CN201
Does the unit operate with the remote controller or
does the OPERATION INDICATOR lamp light up
by pressing the EMERGENCY OPERATION switch?
Yes
Turn OFF the
power supply.
Replace the vane motor.
No
Yes
Is winding resistance
of vane motor 0 "?
1
3
F12
Indoor electronic
control P.C. board
Turn OFF the
power supply.
Yes
Is fuse (F11) blown?
No
No
Is varistor (NR11) burnt?
Yes
Yes
Replace the fan motor.
Replace the varistor.
15
N
2
3
Terminal
block
Replace the fuse.
No
Is winding resistance
of fan motor 0 "?
Thermal fuse connector
No
Measure the
resistance
between
CN201 1 on
the indoor
electronic control
P.C. board and N
on the terminal
block with the
tester.
Replace the indoor
electronic control
P.C. board.
Yes
Is resistance approx. 0"?
No (∞)
Replace the fuse (F12).
OB327 --1qxp
04.1.8 1:42 PM
Page 16
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once.
Outdoor unit doesn’t operate.
D How to check mis-wiring
Start
• Turn ON the power supply.
• Press once EMERGENCY OPERATION switch.
w Short circuit of JPG and JPS on the indoor
electronic control P.C. board enables
self -check to be displayed in 3 seconds.
After three minutes, mis-wiring is indicated
(0.5-second ON, 0.5-second OFF)
on OPERATION INDICATOR
lamp on indoor unit.w
Yes
Make them sure.
Is this mis-wiring, poor contact,
or wire disconnection?
No
A
Turn OFF the power supply and confirm that indoor/
outdoor connecting wire is correct.
Short-circuit indoor terminal block N and 3.
During pressing the OPERATION SELECT button and
B TOO COOL button on the remote controller, press the
RESET button.
(The above procedure allows OPERATION INDICATOR
•The following indication
lamp to indicate the failure-mode.) w2
applies regardless of shape
w2 Mis-wiring may damage indoor electronic
control P.C. board during the operation in
the left. Be sure to confirm the wiring is
correct before the operation starts.
of the indicator.
Flashing
Does the OPERATION INDICATOR lamp flash
quickly when OPERATE/STOP(ON/OFF) button
on the remote controller is pressed?
Operation Indicator
No
(light up or OFF)
w3 Replace the
indoor electronic
control P.C.
board.
Yes
Open-circuit indoor terminal block N and 3,
Check if there is amplitude of 5 to 20V DC between
outdoor terminal block N and 3(for confirmation of serial
signal) and if there is 230V AC between 2 and N.
1. Turn OFF the power supply.
2. Disconnect the connector between the compressor and
the transistor module.
3.Turn ON the power supply.
4. Press the EMERGENCY OPERATION switch.
w3 Be sure to release the failure-mode
recall function after checking.
Procedure of release of failure-mode
1 Press the EMERGENCY
OPERATION switch.
2 Turn OFF the power supply and
then turn ON again.
3 Press the RESET button on the
remote controller.
A
Yes
w3 Replace the outdoor
electronic control P.C.
board.
Yes
Is there voltage approx. 280V DC between LD61A
(+) and LD66A (–) on the inverter P.C. board?
No
Yes
Is there approx. 230V AC between outdoor
terminal block 2 and N when EMERGENCY
OPERATION switch is pressed three minutes
after turn OFF the power supply and then turn
ON again?
No
w3 Rectify indoor/ outdoor connecting wire.
· Turn OFF inverter-controlled lighting
equipment.
· Turn OFF the power supply and then
turn ON again.
· Press the EMERGENCY
OPERATION switch.
Is mis-wiring
indicated when
52C turns ON
three minutes
later?
Yes
As for outdoor unit, refer to service manual OB328 or OB319.
B
16
· Reinstall the
unit away
No from light.
· Attach a filter
on receiving
part.
OB327 --1qxp
04.1.8 1:42 PM
Page 17
When both OPERATION INDICATOR lamps flash 1-time.
Indoor unit and outdoor unit don’t operate.
E Check of installation of the horizontal vanes
Start
Turn OFF the
power supply.
Is the stopper of the horizontal vane
locked to the indoor unit correctly?
No
Relock the stopper of the
horizontal vane to the indoor unit.
Refer to page 11.
Yes
Turn ON the
power supply.
Is the OPERATION
INDICATOR lamp flashing?
No
OK
Yes
To check the continuity of safety device,
measure the resistance of connector 1 - 3
connected to CN1R1 on the indoor
electronic control P.C. board.
Is there resistance 0 "?
No(∞)
Turn OFF the
power supply.
Replace the
safety device.
Yes
Replace the
indoor electronic
control P.C. board.
F Check of thermal fuse
Turn OFF the
power supply.
Is resistance ∞ between the connector CN 201 1 on indoor
electronic control P.C. board and the terminal block N?
Yes
Replace the
thermal fuse (F12).
No
Indoor electronic
control P.C. board
Ok
CN201
17
OB327 --1qxp
04.1.8 1:42 PM
Page 18
TEST POINT DIAGRAM AND VOLTAGE
MSZ-A09YV - E1 MSZ-A12YV - E1
Indoor electronic control P.C. board
}
Fuse F11 250V AC 3.15A
Power supply input
230V AC
R132
}
Indoor fan motor
230V AC
Safety device of
fan by horizontal
vane CN1R1
Room temperature
thermistor RT11
Indoor coil
thermistor
RT12(MAIN)
RT13(SUB)
Varistor
(NR11)
J12
12V
DC
{
}
+
–
J33
Timer short mode
point JPG, JPS
(Refer to page 8.)
Emergency
operation switch
Power monitor receiver P.C. board
J33
– +
Release of Auto restart function
Solder the Jumper wire to the JR07.
(Refer to page 9.)
J23
}
5V DC
Resistance (k")
Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)]
Room temperature thermistor (RT11)
CN302
Temperature (:)
18
OB327 --1qxp
04.1.8 1:42 PM
9
Page 19
DISASSEMBLY INSTRUCTIONS
<"Terminal with lock mechanism" Detaching points>
In case of terminal with lock mechanism, detach the terminal as shown below.
There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism.
The terminal with no lock mechanism can be removed by pulling it out.
Check the shape of the terminal and work.
(1) Slide the sleeve and check if there is a locking lever or not.
(2) The terminal with this connector is a terminal
with lock mechanism
Sleeve
Locking lever
1Slide the sleeve.
2Pull the terminal while
pushing the locking
lever.
1Hold the sleeve, and
pull out the terminal
slowly.
Connector
9-1. MSZ-A09YV - E1 MSZ-A12YV - E1
INDOOR UNIT
PHOTOS
OPERATING PROCEDURE
1. Removing the panel
Photo 1
(1) Remove the screw caps of the panel.
Remove the screws.
(2) Pull the panel down to your side slightly and unhook the
catches at the top.
Screws of the panel
2. Removing the electronic control P.C. board and the
power monitor receiver P.C. board
NOTE : In case of removing only indoor electronic control
P.C. board work (3) is not necessary.
(1) Remove the panel. (Refer to 1.)
(2) Remove the power monitor receiver P.C. board holder from
the bottom of electrical box.
(3) Open the power monitor receiver P.C. board holder and
remove the power monitor receiver P.C. board.
(4) Remove the screw of the electrical cover and the electrical
cover.
(5) Remove the screw of the V.A. clamp and the V.A. clamp.
(6) Remove the screw of the cord clamp and the cord clamp.
(7) Remove the screw of the terminal block.
(8) Remove the screw of the ground wire.
(9) Pull out indoor electronic control P.C. board slightly.
(10) Disconnect all (except CN109, CN125) the connectors on
the electronic control P.C. board.
(11) Remove the electronic control P.C. board.
(12) Disconnect the connector of power monitor receiver P.C.
board (CN109, CN125) on the electronic control P.C.
board.
19
Photo 2
Terminal block
fixing screw
Screw of the
ground wire
Indoor electronic
control P.C. board
Cord clamp fixing
screw
Screw of the V.A.
clamp
Screw of the
electrical cover
Power monitor receiver
P.C. board holder
OB327 --1qxp
04.1.8 1:42 PM
Page 20
OPERATING PROCEDURE
PHOTOS
3. Removing the electrical box
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Remove the panel. (Refer to 1.)
Remove the electrical cover. (Refer to 2.)
Remove the V.A. clamp. (Refer to 2.)
Remove the cord clamp. (Refer to 2.)
Remove the terminal block. (Refer to 2.)
Remove the screw of ground wire. (Refer to 2.)
Disconnect the connector of the indoor coil thermistor
(CN112), the fan motor connector (CN211 and CN121), the
vane motor connector (CN151) and the connector of the
safety device (CN1R1) on the electronic control P.C. board.
(8) Remove the fan motor lead wire and indoor coil thermistor
from the electrical box.
(9) Remove the lead wire of vane motor and safety device from
the bottom of electrical box.
(10) Remove the screw fixing the electrical box, remove the
electrical box.
Photo 3
Indoor coil thermistor
connector
Vane motor
connector
Screw of the
electrical box
Fan motor connector
4. Removing the nozzle assembly and the vane motor
Photo 4
Screws of the vane motor
(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical box. (Refer to 3.)
(3) Pull out the drain hose from the nozzle assembly, remove
the nozzle assembly.
(4) Remove the screws of the vane motor, disconnect the
vane motor connector.
(5) Remove the vane motor.
Drain hose
5. Removing the indoor fan motor and the line flow fan
(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical box. (Refer to 3.)
(3) Pull out the drain hose from the nozzle assembly, remove
the nozzle assembly. (Refer to 4.)
(4) Remove the screw of the lead cover and the lead cover.
(5) Remove the lead wire of the fan motor.
(6) Release the hooks of the motor band and open it slightly.
(7) Loosen the hexagon socket set screw of the line flow fan.
(8) Remove the screws fixing the motor bed, remove the fan
motor with motor band and the motor bed.
(9) Remove the screws fixing the left side of the heat
exchanger.
(10) Lift the left side of the heat exchanger.
(11) Remove the line flow fan.
Photo 6
Screw of
the lead
cover
Photo 5
Screws of the
left side of the
heat exchanger
Photo 7
Hexagon socket set screw
Hooks of the
motor band
20
Screws of
the motor
bed
OB327 --1qxp
04.1.8 1:42 PM
10
Page 21
PARTS LIST
MSZ-A09YV - E1 (WH)
MSZ-A12YV - E1 (WH)
10-1. INDOOR UNIT STRUCTURAL PARTS
1 (w)
10-2. ACCESSORY AND REMOTE
CONTROLLER
11
10
9 (w)
8
2
7 (See page 23.)
3
4
(w) These figures show about MSZ-A12YV.
5
6
10-1. INDOOR UNIT STRUCTURAL PARTS
No.
1
2
3
4
5
6
7
8
9
Part No.
Part name
Q'ty/unit
Symbol
in Wiring MSZ-A09YV - E1 MSZ-A12YV - E1
Diagram
(WH)
(WH)
BOX (WH)
BOX (WH)
PANEL ASSEMBLY (WH)
SCREW CAP
FRONT PANEL (WH)
CATCH
CATECHIN AIR FILTER
CATECHIN AIR FILTER
AIR CLEANING FILTER
E02 749 975 CORNER BOX (RIGHT)
E02 408 970 INSTALLATION PLATE
E02 751 970 INSTALLATION PLATE
E02
E02
E02
E02
E02
E02
E02
E02
749
751
838
749
838
408
763
764
Remarks
1
234
234
000
067
010
142
100
100
1
2
1
2
2
2
1
1
1
1
2
1
2
2
2
1
Including No.3,4,5
2PCS/SET
2PCS/SET
MAC-1300FT
1
10-2. ACCESSORY AND REMOTE CONTROLLER
10
11
E02 838 426 REMOTE CONTROLLER
E02 527 083 REMOTE CONTROLLER HOLDER
1
1
21
1
1
KG04A
OB327 --1qxp
04.1.8 1:42 PM
Page 22
MSZ-A09YV - E1 (WH)
MSZ-A12YV - E1 (WH)
10-4. INDOOR UNIT HEAT EXCHANGER
10-3. INDOOR UNIT ELECTRICAL PARTS
AND FUNCTIONAL PARTS
21
SLEEVE
BEARING
20
19
23 (W)
18
17
2
1
15
ROOM TEMPERATURE
THERMISTOR
3
16
4
5
14
24
25
13
6
FUSE
7
VARISTOR
89
10
11
(W) This figure shows about MSZ-A12YV.
12
10-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS
Part number that is circled is not shown in the illustration.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Part No.
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
001
661
838
815
838
838
127
829
749
763
815
838
839
749
151
749
751
749
679
665
151
838
749
408
751
408
504
702
235
316
040
041
382
385
385
034
468
452
452
303
308
300
300
333
375
505
505
307
302
509
509
381
Part name
Q'ty/unit
Symbol
in Wiring MSZ-A09YV- E1 MSZ-A12YV- E1
Diagram
(WH)
(WH)
SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBLY (WH)
SAFETY DEVICE
VANE UPPER
VANE LOWER
FUSE
F11
NR11
VARISTOR
NR12
VARISTOR
VANE CRANK SET
POWER MONITOR RECEIVER P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
VANE MOTOR
MV
ROOM TEMPERATURE THERMISTOR RT11
INDOOR FAN MOTOR
MF
INDOOR FAN MOTOR
MF
MOTOR BAND
TERMINAL BLOCK
TB
FAN MOTOR RUBBER MOUNT
FAN MOTOR RUBBER MOUNT
RT12, RT13
INDOOR COIL THERMISTOR
LINE FLOW FAN
BEARING MOUNT
BEARING MOUNT
F12
THERMAL FUSE
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
Remarks
3.15A
AUTO RESTART
AUTO RESTART
RC4V19RC4V19-
2PCS/SET
2PCS/SET
93:
10-4. INDOOR UNIT HEAT EXCHANGER
23
24
25
E02
E02
E02
E02
E02
749
839
815
151
151
620
620
666
666
667
1
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
UNION (GAS)
UNION (GAS)
UNION (LIQUID)
1
1
1
1
22
1
{9.52
{9.52
{6.35
OB327 --1qxp
04.1.8 1:42 PM
Page 23
10-5. AIR CLEANING FILTER
● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity.
● Normal life of AIR CLEANING FILTER is 4 months. However, when it becomes dirty, replace it as soon as possible.
● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet.
● DO NOT reuse AIR CLEANING FILTER even if it is washed.
● DO NOT remove or attach AIR CLEANING FILTER during unit operation.
Model
MSZ-A09YV MSZ-A12YV -
Part No.
E1
MAC-1300FT
E1
Air cleaning filter
(White bellows type)
11
OPTIONAL PARTS
QUICK CLEAN KIT
● You can sweep the surface of heat exchanger if you install the special-made brush to your vacuum cleaner.
Model
MSZ-A09YV MSZ-A12YV -
Part No.
E1
E1
MAC-093SS-E
Heat exchanger
23
OB327 --1qxp
04.1.8 1:42 PM
Page 24
HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN
C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Jan. 2004. No. OB327 6
Made in Japan
New publication, effective Jan. 2004
Specifications subject to change without notice.