LG LP-F8081ZL Service Manual ▷ View online
–48–
2) Indoor fan does not operate.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Is the unit
operating?
Is the DC5V at 20 pin
of MICOM?
Is the DC12V at each
terminal of RY1 coil of
SUB PCB ASM?
Replacement IC03M
Is the AC220V (240V)
between "C" and "H" of
SUB P.C.B?
Replacement RY1 of
SUB PCB
Check the motor winding
Replacement RY2 of
SUB PCB
Replacement RY3 of
SUB PCB
Is the AC220V (240V)
between "C" and "M" of
SUB P.C.B?
Is the AC220V (240V)
between "C" and "L" of
SUB P.C.B?
Is the DC12V at each
terminal of RY2 of SUB
PCB ASM?
Is the DC12V at each
terminal of RY3 of SUB
PCB ASM?
Is the DC5V at 21 pin
of MICOM?
Is the DC5V at 22 pin
of MICOM?
Replacement
MICOM and check
the EVA-Th
ON/OFF S/W ON
–49–
3) The unit does not operate.
YES
NO
YES
NO
YES
NO
YES
NO
4) Timer control does not operate.
Replacement MICOM
Is the AC220V
(240V) at Trans input terminal?
Is the AC12-18V at
Trans (2nd)?
Is the connector of
Main/Display correct?
Is the DC5V between PIN64
and PIN 32 of MICOM?
Replacement Main PCB ASM
1. Replacement IC03D
2. Replacement Main PCB ASM
2. Replacement Main PCB ASM
Check the connector of
Main/Display
Main/Display
Replacement Trans
1. Check the electric connections
2. Check the fuse of Main PCB ASM
2. Check the fuse of Main PCB ASM
–50–
4) No heating operation performed.
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
ON/OFF S/W ON
Is the AC220V
(AC 240 V) between connector
(CN-outunit)
¥L
and
¥N
of Main
P.C.B
Is the input power AC220V
(AC240V) at COMP magnetic coil
contactor?
Is it heating mode?
Room temp <Set temp?
Is the DC5V
at 14 pin of MICOM
Is the DC5V at 18 pin of
MICOM
Is the DC12V
at each terminal?
(RY-4way COIL)
Is the
AC220V (AC 240 V) between
connector(4WAY) and CN-outunit
¥L
of
Main
P.C.B
P.C.B
Is the DC12V at
each terminal? (RY-Comp)
Replacement RY-4way
Replacement IC02M
Replacement RY3
Is the AC220V
(AC 240 V) between connector(CN-outunit)
¥L
and
¥N
of Main
P.C.B
Check the wiring diagram.
Replacement MICOM
Replacement IC02M
Room temp. < Set temp. Setting
Replacement MICOM
Select the heating operation mode.
Check the COMP magnetic
contactor of outdoor unit.
contactor of outdoor unit.
Check the wiring
connection
Is the unit operating?
–51–
5) No heater operation performed.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Is the heating operating?
Is the Heat S/W of Main
PCB "ON"?
Heat S/W "ON"
Heater S/W "ON"
Replacement MICOM
Replacement IC02M
Replacement RY-Heater
Is the heater S/W of Main
PCB"ON"?
Is the DC 5V at 58 pin of
MICOM
Is the DC 12V at eack terminal?
(RY-Heater)
Is the
AC220V (AC 240 V) between
connector(HEATER) and CN-outunit
¥L
of
Main P.C.B
Check the heater wiring
Select the heating operation mode.
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