67
11-2. Instruction of troubleshooting
MSZ-G09SV -
MSZ-G12SV -
MSZ-G09SV -
MSZ-G12SV -
E2
E2
E1
E1
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Indoor unit
does'nt receive
the signal from
remote controller.
OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.
Outdoor unit
operates in
only Test Run
operation.
Outdoor unit
does'nt
operate
even in
Test Run
operation.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Check room
temperature
thermistor.
Refer to
"Test point
diagram and
voltage" on
page 90.
Refr to
A
"How to check
inverter/
compressor"
on page 76.
Refer to
H
"Check of
remote controller
and receiver
P.C. board"
on page 78.
Refer to
I
"Check of indoor
electronic control
P.C. board"
on page 79.
1-time flash
Cause: Indoor/
Outdoor unit
• Trouble of
serial signal
2-time flash
Cause:
Indoor unit
• Trouble of
room temper-
ature/ indoor
coil thermistor
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor
5-time flash
Cause:
Outdoor unit
• Outdoor
power
system
abnormality
6-time flash
Cause:
Outdoor unit
• Trouble of
thermistor
in outdoor
unit
7-time flash
Cause:
Outdoor unit
• Trouble of
outdoor
control
system
Check room
temperature
thermistor and
indoor coil
thermistor.
Refer to
"Test point
diagram and
voltage"
on page 90.
Refer to
G
"Check of
indoor fan
motor"
on page 78.
Refer to
A
"How to check
inverter/
compressor"
on page 76.
Refer to
J
"Check of
outdoor
thermistors"
on page 79.
Replace the
outdoor
electronic
control
P.C. board.
Flash on and
off at
0.5-second
intervals
Cause:
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.
OB245--3qxp 02.10.22 4:15 PM Page 67