Troubleshooting Guide
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67*
Master 671
Slave1 672
Slave2 673
Slave3 674
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
(U,V,W output)
3. Reversing rotation after RPM target apply
4. Fan PCB assembly defect
5. Fan lock by Heavy Snowfall.
n 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. Check resistance between each phase(U,V,W) of ODU
fan motor terminal (16.8
Ω
±5% at 75°…)
2. Check insulation resistance between ODU fan motor
terminal(U,V,W)
→ Replace fan motor if abnormality found
Is wire connection of
ODU Fan Motor wire normal?
No
Yes
Check wiring between ODU fan motor and fan PCB
( Check if and Motor output terminal color is matched)
→ Reassemble if abnormality found
Is Fan PCB assembly normal?
No
Yes
Replace Fan PCB assembly
* Fan Motor resistance measuring
between each phase
* Fan left(1) * Fan right(2)
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