LG ARUN Series Service Manual page 112

Troubleshooting Guide
Error
Error Type
No.
67*
Master
Fan Lock Error
671
Slave
672
I 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 Fan PCB assembly normal?
Yes
Recheck power and installation condition
* Fan Motor resistance measuring
between each phase
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Only for training and service purposes
Error Point
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. Check resistance between each phase(U,V,W) of ODU
fan motor terminal (16.8Ω ±5% at 75°C(167°F))
No
2. Check insulation resistance between ODU fan motor
terminal(U,V,W)
¡ Replace fan motor if abnormality found
Check wiring between OUD fan motor and fan PCB
No
( Check if Hall Senor and Motor output terminal color is
matched)
¡ Reassemble if abnormality found
No
Replace Fan PCB assembly
* Hall Sensor connector
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Main Reasons
1. Fan motor defect / assembly condition
abnormal
2. Wrong connection of fan motor connector
(Hall sensor, U,V,W output)
3. Reversing rotation after RPM target apply
4. Fan PCB assembly defect
* Fan Motor Wire connection
LGE Internal Use Only