Mitsubishi Electric MSZ-G09SV Service Manual page 67

11-2. Instruction of troubleshooting
MSZ-G09SV -
E1
MSZ-G09SV -
E2
Outdoor unit
operates in
only Test Run
operation.
Check room
temperature
thermistor.
Refer to
"Test point
diagram and
voltage" on
page 90.
Flash on and
1-time flash
off at
Cause: Indoor/
0.5-second
Outdoor unit
intervals
• Trouble of
Cause:
serial signal
Indoor/
Outdoor unit
• Mis-wiring
Refer to Q
"How to check of
mis-wiring and serial
signal error"
(When outdoor unit
doesn't work)"
on page 83.
MSZ-G12SV -
E1
MSZ-G12SV -
E2
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
does'nt
operate
even in
Test Run
operation.
Refr to A
"How to check
inverter/
compressor"
on page 76.
2-time flash
Cause:
Indoor unit
• Trouble of
room temper-
ature/ indoor
coil thermistor
Check room
temperature
thermistor and
indoor coil
thermistor.
Refer to
"Test point
diagram and
voltage"
on page 90.
Indoor unit
does'nt receive
the signal from
remote controller.
Indoor unit
Indoor unit
doesn't operate,
operates, when
when the
the EMERGENCY
EMERGENCY
OPERATION
OPERATION
switch is pressed.
switch is pressed.
Refer to H
Refer to I
"Check of
"Check of indoor
remote controller
electronic control
and receiver
P.C. board"
P.C. board"
on page 79.
on page 78.
3-time flash
5-time flash
Cause:
Cause:
Indoor unit
Outdoor unit
• Trouble of
• Outdoor
indoor fan
power
motor
system
abnormality
Refer to G
Refer to A
"Check of
"How to check
indoor fan
inverter/
motor"
compressor"
on page 78.
on page 76.
67
OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.
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 J Replace the
outdoor
"Check of
electronic
outdoor
control
thermistors"
P.C. board.
on page 79.