LG LP-E5082HA_HL Service Manual ▷ View online
– 74 –
3) Airflow Direction does not operate.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Is the unit operating?
Is the Auto Swing S/W "ON"?
Is the DC5V at 46 terminal?
(MICOM)
Is the DC12V
at each terminal?
(RY4 COIL)
Check the synchronous
motor winding.
motor winding.
Replacement RY4
Check synchronous connector
contact point.
Check synchronous connector
contact point.
Is the AC220V(240V)
at each terminal
(SYN. MOTOR CONNECTOR)?
Replacement IC3
Replacement IC1 (MICOM)
Reset the power ON/OFF S/W
Press the Auto Swing S/W
– 75 –
4) Remote control does not operate.
YES
NO
YES
NO
YES
NO
YES
NO
Is the battery of remote
controller normal?
Check the connector.
(CN-1)
Is the CN-1
connector normal?
Does the operation
of remote controller
properly?
Is the Preamp of
display normal?
Replacement IC1 (MICOM)
Replacement preamp assy
Replacement remote-controller
Replacement battery
– 76 –
5) The unit does not operate.
YES
NO
YES
NO
YES
NO
YES
NO
6) Timer control does not operate.
Timer delay safety control does not operate.
Replacement IC1
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 PIN1
and PIN 3 of MICOM?
Replacement Main PCB ASM
1. Replacement IC6
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
– 77 –
7) No heating operation works
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
Reset the power
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 52 pin of IC1 terminal
(MICOM)
Is the DC5V
at 59 pin of IC1 terminal
(MICOM)
Is the DC12V
at each terminal?
(RY7 COIL)
Is the
AC220V (AC 240 V) between
connector(4WAY) and CN-outunit
¥L
of
Main
P.C.B
Is the DC12V at
each terminal? (RY3COIL)
Replacement RY7
Replacement IC3
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 IC1 (MICOM)
Replacement IC3
Room temp. < Set temp. Setting
Replacement IC1 (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?
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