LG LS-D1862HL Service Manual ▷ View online
- 57 -
Exchange TR01 and ZD01.
Exchange IC2.
Exchange IC3.
Exchange IC4.
Connect correctly.
Check P.C.B pattern.
Is the input voltage of IC2
about DC22V?
Is the output of IC2 DC12V?
Is the output of IC3 DC5V?
Is the output of NO.43 pin of
IC1 DC5V?
Is the output of NO.64 pin of
IC1 DC5V?
Exchange IC1.
Is the connection between
main P.C.B and CN-Display
P.C.B correct?
NO
NO
: Check Indoor unit
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
- 58 -
Possible Trouble 2
: Indoor fan does not operate.
Is it the Heating operation
Mode?
Is DC40V between 1 and
3 of CN-FAN?
Is DC12V between 3 and 4
of CN-FAN?
Check CN-FAN and P.C.B pattern.
Exchange Motor sub
P.C.B ASM
P.C.B ASM
Does the temperature
set all right?
Does the LD4 of
display P.C.B asm
light?
YES
NO
24K, 26K, 28K
NO
NO
NO
NO
YES
YES
YES
YES
Adjust setting temp.
Check the FAN Motor and
Connector.
Connector.
Check CN-FAN, CN-DC/DC
Connector and outdoor P.C.B
ASM.
Connector and outdoor P.C.B
ASM.
- 59 -
Possible Trouble 3
Possible Trouble 4
: Right/Left air direction louver does not operate.
: Up/Down air direction louver does not operate.
Is the IC7,8 O.K?
NO
Exchange the IC7,8.
Connect correctly.
Connect correctly.
Check DC 12V pattern of
main P.C.B.
main P.C.B.
NO
NO
NO
NO
NO
YES
YES
YES
Exchange step motor.
YES
YES
YES
Is the voltage of NO.1
pin of CN-LEFT, CN-RIGHT
DC12V?
Is the IC7 OK?
Exchange IC7
Check DC12V pattern of
main P.C.B.
main P.C.B.
Is the voltage of NO.1 pin of
CN-Up/Down DC12V?
Is the connection
between step motor and
main P.C.B OK?
Exchange step motor.
Is the connection
between step motor and
main P.C.B OK?
(1) Indoor Unit
- 6 -
Dimensions
W
H
D
W
H
D
Tubing hole cover
Tubing hole cover
Tubing hole cover
Tubing hole cover
Installation plate
Installation plate
MODEL
ALL MODELS
DIMENSION
W
mm
1,080
H
mm
290
D
mm
183
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