LG LWB0760ACG / LWB0811CCL Service Manual ▷ View online
—21—
Is setting
Temp. set lower than Room
Temp.-0.5
°
C?
Is the voltage No.10
of IC7 0V?
• Exchange IC7.
• Select the setting Temp. to lower Number.
• Wait 3 Minutes
Is the Unit for 3 minutes
delay?
• Exchange MAIN
PCB Ass'y.
PCB Ass'y.
Is the voltage N0.7 of
IC 7 DC 5V?
• Check the RY-COMP.
• Check the wiring
Diagram.
Diagram.
NO
NO
NO
NO
YES
YES
YES
YES
Possible Trouble 2
• The compressor does not operate.
Is the wire connection of
RY-COMP all right?
• Check the RY-COMP.
• Connect LEAD Wire to
RY-COMP again.
RY-COMP again.
NO
YES
Possible Trouble 3
• The compressor always operate.
—22—
• Exchange IC1.
• Exchange IC7.
Is the voltage NO.2 or 3
of IC7 DC 5V?
Is the voltage NO.14 or 15
of IC7 0V?
• Check the RY-High or
RY-Low.
• Check the wiring diagram.
NO
NO
YES
YES
Possible Trouble 4
• Fan does not operate.
Is the voltage of Battery
about over 2.3V?
• Exchange Receiver Ass'y.
Is the connection of
CN-DISP2 all right?
Is the voltage No.7
of CN-DISP2 on Main PCB
Ass'y DC 5V?
• Exchange the battery.
• Check the PCB pattern.
• Connect connector to
CN-DISP2 exactly.
CN-DISP2 exactly.
NO
NO
NO
YES
YES
YES
Possible Trouble 5
• Romote controller does not operate.
—23—
NO
NO
NO
NO
YES
YES
YES
Is the IC6 all right?
Is the connection of
CN-DISP1 all right?
• Exchange the display
PCB Ass'y.
PCB Ass'y.
• Exchange IC6.
• Exchange TR1,
TR2, TR3.
TR2, TR3.
• Connect connector
to CN-DISP1 exactly.
to CN-DISP1 exactly.
Does the TR1,
TR2, TR3 operate normally
on main PCB Ass'y?
Possible Trouble 6
• It displays abnormally on Display PCB Ass'y.
NO
NO
YES
YES
Is the Knob of SW1
set to left position?
Is the voltage No.3 of
CN-DISP2 of Main PCB
Ass'y DC 5V?
• Reference to
OWNER'S MANUAL.
OWNER'S MANUAL.
• Set the Knob of SW1
to left position.
to left position.
• Check the SW1.
• Check the pattern of
Main & Display PCB.
• Check the pattern of
Main & Display PCB.
Possible Trouble 7
• The function of Auto Restart does not operate.
—24—
—24—
—24—
COMPLAINT
CAUSE
REMEDY
Check voltage at outlet. Correct if none.
Check voltage to rotary switch. If none, check
power supply cord. Replace cord if circuit is open.
power supply cord. Replace cord if circuit is open.
Check switch continuity. Refer to wiring diagram
for terminal identification. Replace switch if none
defective.
for terminal identification. Replace switch if none
defective.
Connect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.
identification. Repair or replace loose terminal.
Test capacitor.
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.
Fan blade hitting shroud or blower wheel hitting
scroll. Realign assembly.
scroll. Realign assembly.
Units using slinger ring condenser fans must
have
have
2
/
9
to
1
/
4
inch clearance to the base. If it is
the base, shim up the bottom of the fan
motor with mounting screw(s).
motor with mounting screw(s).
Check fan motor bearings; if motor shaft will not
rotate, replace the motor.
rotate, replace the motor.
Check voltage. See limits on this page. If not within
limits, call an electrician.
limits, call an electrician.
Test capacitor.
Check bearings. Does the fan blade rotate freely.
If not, replace fan motor.
Check bearings. Does the fan blade rotate freely.
If not, replace fan motor.
Pay attention to any change from high speed to
low speed. If the speed does not change, replace
the motor.
low speed. If the speed does not change, replace
the motor.
No power
Power supply cord
Rotary switch
Wire disconnected or
connection loose
connection loose
Capacitor (Discharge
capacitor before testing.)
capacitor before testing.)
Will not rotate
Revolves on overload.
Fan motor will not run.
Fan motor runs.
ROOM AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
MINIMUM
MAXIMUM
115V
103.5V
126.5V
220V ~ 240V
198V
264V
110V
99V
121V
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