LG LM-1962C2N_M_D Service Manual ▷ View online
- 60 -
Possible Trouble 3
Possible Trouble 4
: Up/Down Air direction louver does not operate.
: Remote controller does not operate.
Is the IC7 O.K?
NO
Exchange the IC7.
Check the P.C.B of
DC 12V pattern.
DC 12V pattern.
NO
NO
NO
NO
YES
YES
YES
YES
YES
Is the voltage
of CN-UP/DOWN
NO 1DC12V?
Is the battery con-
sumption O.K?
Exchange the battery.
Check the P.C.B pattern.
Connect CN-DISP
exactly.
exactly.
Is DC5V between 1
and 7 of CN-DISP
Is the connection of
CN-DISP all right?
Exchange receiver asm
Check the step motor and
Connector(CN-UP/DOWN)
Connector(CN-UP/DOWN)
- 61 -
Possible Trouble 5
: It does not operate forced operation.
NO
YES
Is the F/OP key
OK?
Exchange the F/OP key
P.C.B pattern Check
- 62 -
Possible Trouble 1
: The unit does not operate.
Is the trans input power
AC240V?
Is the trans output power
about AC14V?
Is input voltage of IC2
DC15V?
Is output voltage of IC2
DC12V?
Is output voltage of IC3
DC5V?
Is the reset circuit
all right?
Is output voltage of
IC1 PIN22,42 DC5V?
Check the fuse check
the wiring diagram.
the wiring diagram.
Is shorted the
trans output?
NO
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Check the main P.C.B
pattern.
pattern.
Exchange the trans.
Exchange BD11.
Exchange IC2.
Exchange IC3.
Check and exchange
IC4.
IC4.
Check the DC 5V
P.C.B pattern.
P.C.B pattern.
Exchange IC1
1-2. Indoor(Heating Model)
- 63 -
Possible Trouble 2
: Fan does not operate.
Is it the DRY Mode?
Is it the HOT Mode?
Is the IC5 O.K?
Is the SSR all right?
Exchange the SSR.
Check the FAN Motor.
Does the temperature
set all right?
Does the temperature
set all right?
Does the temperature
set all right?
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
Adjust setting temp.
Adjust setting temp.
Check the FAN Motor
and Connector.
and Connector.
Exchange the IC5.
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