LG A2UW18GFA0 Svc Manual page 76

Display
Title
code
67 Fan Lock Error
■ Error Diagnosis and Countermeasure Flow Chart
Is ODU Fan Motor Assemble
condition normal?
Yes
Is ODU Fan Motor normal?
Yes
Is wire connection of
ODU Fan Motor wire normal?
Yes
Is connector PCB assembly normal?
Yes
Is main PCB assembly normal?
Yes
Recheck power and installation condition
Check Point
1. Check voltage between 1pin and 4pin of Fan Mortor connector (Tester diode mode)
2. Voltage value should be in 1V ±0.2V.
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Only for training and service purposes
Cause of error
Fan RPM is 10RPM or less
for 5 sec. when ODU fan
starts or 40 RPM or less
after fan starting.
Check ODU Fan Motor assemble condition and fan locking
No
-> Reassemble or replace if abnormality found
1. Set the multi tester to diode mode.
2. Check voltage between 1pin and 4pin of Fan Motor
No
(1 0.2V)
3. Replace Inverter PCB if abnormality found.
Check wiring between OUD fan motor and Inverter PCB
No
( Check if Hall Senor and Motor output terminal color is
matched)
-> Reassemble if abnormality found
No
Replace connector PCB assembly
No
Replace main PCB assembly
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Part 5. Trouble Shooting
Check point & Normal condition
• ODU fan locking
• Heatsink assembly of INV PCB assemble condi-
tion abnormal
• Defect of temperature sensing circuit part defect
of INV PCB
LGE Internal Use Only