LG MULTI V Service Manual page 136

Self-diagnosis function
Error No. Error Type
67
Fan Lock Error
n 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 Inv. PCB assembly normal?
Yes
Recheck power and installation condition
* Inv. PCB
Error Point
Fan RPM is 10RPM or less
for 5 seconds 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. Check resistance between each phase(U,V,W) of ODU
fan motor terminal (16.8 Ω ±5 % at 75 °...)
No
2. Check insulation resistance between ODU fan motor
terminal(U,V,W)
→ Replace fan motor if abnormality found
Check wiring between ODU fan motor and Inv. PCB
No
(Check if and Motor output terminal color is matched)
→ Reassemble if abnormality found
No
Replace Inv. PCB assembly
Fan1
Fan2
- 136 -
Main Reasons
1. Fan motor defect / assembly condition
abnormal
2. Wrong connection of fan motor connector
3. Reversing rotation after RPM target apply
4. Inv. PCB assembly defect
5. Fan lock by Heavy Snowfall.
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