LG ACHH Series Manual page 84

Error code check
Error number Errors
67
Fan Lock Error
(671)
n Failure diagnosis method
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 Fan PCB assembly normal?
Yes
Recheck power and installation condition
* Fan Motor resistance measuring
between each phase
Meaning
Fan RPM is 10 RPM or 1. Fan motor defect / assembly condition abnormal
less for 5 sec. when 2. Wrong connection of fan motor connector
ODU fan starts or 40 3. Reversing rotation after RPM target apply
RPM or less after fan 4. Fan PCB assembly defect
starting. 5. Fan lock by Heavy Snowfall.
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 fan
motor terminal
-Panasonic Motor : 9.5 Ω ± 5 % (@25 ℃)
No
-LG Motor : 8.6 Ω ± 7 % (@25 ℃)
2. Check insulation resistance between fan motor
terminal(U,V,W) → Replace fan motor if abnormality
found
Check wiring between fan motor and fan PCB
No
→ Reassemble if abnormality found
No
Replace Fan PCB assembly
* Fan Motor Wire connection
- 84 -
Main cause of occurrence