LG LS-D1862HL Service Manual ▷ View online
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Possible Trouble 5
Possible Trouble 6
: Remote controller does not operate.
: Forced operation key does not work.
Is the battery voltage OK?
Is voltage between pin
NO1 and NO.7 of CN-DISP
DC5V?
Is the connection of
CN-DISP P.C.B all right?
Is the Slide Switch located
at the FORCED OPERATION
mode?
Exchange display P.C.B ASM.
Check P.C.B pattern
Exchange the battery.
Check main P.C.B pattern.
Connect CN-DISP exactly.
Put the Slide Switch on the
FORCED OPERATION.
FORCED OPERATION.
NO
NO
NO
NO
YES
YES
YES
YES
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Possible Trouble 7
: Ineffective Heating
Is the operation mode right?
Is the connection
between CN-TH and out-
door main PCB all right?
Does 4-way valve work?
Is the voltage of pin NO.4
of IC8 DC5V?
Is the voltage of pin NO.13
of IC8 DC0V?
Is the voltage of CN-4way
AC220V-240V?
Is the connection of
CN-4way OK?
Check P.C.B pattern.
Set heating opertion
mode.
mode.
Connect correctly.
Connect correctly.
Exchange IC1.
Exchange IC8.
Exchange RY-4way.
Exchange 4-way valve
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
(1) MAIN P.C.B ASM (Indoor Unit)
(18K models)
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Electronic Control Device
OPTIONAL FUNCTION
OR2
OR3
OR3
CN-LEFT
CN-RIGHT
CN-ION
LS-D1864CL/CM/CD
6871AQ2362C
5.1KF
12KF
1KF
NO
NO
NO
LS-D1865CL/CM/CD
6871AQ2362D
5.1KF
12KF
1KF
YES
YES
NO
LS-D1864HL/HM/HD
6871AQ2362B
56KF
12KF
1KF
NO
NO
NO
LS-D1865HL/HM/HD
6871AQ2362E
56KF
12KF
1KF
YES
YES
NO
MODEL
P/No.
- 63 -
OPTIONAL FUNCTION
R13
R24
R25
R26
CN-LEFT
CN-RIGHT
CN-ION
LS-D2424CL/CM
6871AQ2369D
5.3KF
14.3KF
21KF
SHORT
NO
NO
NO
MODEL
P/No.
LS-D2424CL/CM
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