LG Multi V - Page 97

Troubleshooting Guide
- 97 -
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67
Fan Lock Error
Error
No.
Error Type Error Point Main Reasons
Fan RPM is 10RPM or less
for 5 sec. when ODU fan
starts or 40 RPM or less
after fan starting.
1. Fan motor defect / assembly condition
abnormal
2. Wrong connection of fan motor connector
3. Reversing rotation after RPM target apply
4. Inverter PCB assembly defect
■ Error Diagnosis and Countermeasure Flow Chart
Is ODU Fan Motor Assemble
condition normal?
No
Yes
Recheck power and installation condition
Check ODU Fan Motor assemble condition and fan locking
→ Reassemble or replace if abnormality found
Is ODU Fan Motor normal?
No
Yes
1. Set the multi tester to diode mode.
2. Check voltage between 1pin and 4pin of Fan Motor
(1±0.2V)
3. Replace Inverter PCB if abnormality found.
Is wire connection of
ODU Fan Motor wire normal?
No
Yes
Check wiring between OUD fan motor and Inverter PCB
( Check if Hall Senor and Motor output terminal color is
matched)
→ Reassemble if abnormality found
Is Inverter PCB assembly normal?
No
Yes
Replace Inverter PCB assembly
• Fan Motor resistance measuring
between each phase
Tester
Fan motor
connector
Check voltage betwen
1pin and 4pin of fan motor