Mitsubishi Electric MSZ-GA35VA Service Manual page 14

9-3. Instruction of troubleshooting
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
Outdoor unit
operates in
doesn't
only Test Run
operate
operation.
even in
w1
Test Run
operation.
Refer to
Check room
"How to check
temperature
inverter/
thermistor.
compressor".
Refer to 9-7.
"Test point
diagram and
voltage".
Left lamp
All lamps
Flash on and off
Flash on and off
at 0.5-second
at 0.5-second
intervals
intervals
Cause: Cause:
Indoor unit
Indoor/
• The horizontal
Outdoor unit
vane is not
• Mis-wiring
installed
or trouble
correctly.
of serial signal
Refer to 9-6. Refer to 9-6.
E "Check of D "How to
installation of check of
the horizontal mis-wiring
vane". and serial
signal error
(when
outdoor unit
doesn't work)".
Indoor unit operates.
Outdoor unit doesn't
operate normally.
Indoor unit
Unit doesn't
operates, when
operate
EMERGENCY
normal
OPERATION
operation in
switch is pressed.
COOL or
HEAT mode.
w1
Refer to
Refer to 9-6.B
"Check of
"Check of
R.V. coil".
remote controller
and receiver
P.C. board".
Left lamp
Left lamp
2-time flash
3-time flash
Cause:
Cause:
Indoor unit
Indoor unit
• Trouble of
• Trouble of
room temp-
indoor fan
erature/
motor
indoor coil
thermistor
Refer to 9-6.
Check room
A "Check of
temperature
indoor fan
thermistor
motor".
and indoor
coil thermis-
tor.
Refer to 9-7.
"Test point
diagram and
voltage".
Indoor unit
OPERATION INDICATOR
doesn't receive
lamp on the indoor unit is
the signal from
flashing on and off.
remote controller.
Indoor unit
doesn't operate,
when
EMERGENCY
OPERATION
switch is pressed.
1. Check indoor / outdoor
connecting wire.
(Check if the power
is supplied to the
indoor unit.)
2. Refer to 9-6.C
"Check of indoor
electronic control
P.C. board and indoor
fan motor".
Left lamp
Left lamp
4-time flash
5-time flash
Cause:
Cause:
Indoor unit
Outdoor unit
• Trouble of
• Outdoor
indoor unit
power
control
system
system
abnormality
Refer to
Replace the
indoor "How to check
inverter/
electronic
compressor".
control
P.C. board.
14
If blinking of OPERATION
INDICATOR lamp cannot be
checked, it can be checked with
failure mode recall function.
w1
"Test Run operation" means the
operation within 30 minutes after
EMERGNCY OPERATION switch
is pressed.
As for outdoor unit MUZ type,
refer to service manual OB379.
As for outdoor unit MXZ type,
refer to service manual OB377.
Left lamp
Left lamp
7-time flash
6-time flash
Cause:
Cause:
Outdoor unit
Outdoor unit
• Trouble of
• Trouble of
outdoor
thermistor
control
in outdoor
system
unit
Refer to Replace the
"Check of inverter P.C.
outdoor board or
thermistors". the outdoor
electronic
control P.C.
board.
Left lamp
14-time flash
Cause:
Outdoor unit
• Other
abnormality
Check
"Flow chart of
the detailed
outdoor unit
failure mode
recall function."