LG ARUN Series Service Manual page 119

Error No. Error Type
76*
Fan DC Link High Voltage
Master 761
Error
Slave 762
I Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
Yes
Is Fan PCB assembly normal?
Yes
Recheck power and
installation condition
T
Noise filter output(lower part)
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Error Point
Fan PCB DC link voltage supplied
over 780V\
Check
No
R~S/S~T/T~R phase voltage : 460 ±10% (3Ø 460V)
¡ Check connection condition and wiring if power is abnormal
No
Replace Fan PCB assembly
Measuring input voltage
Noise filter wiring
R
S
- 119 -
1.Input power abnormal
2.Fan PCB assembly defect
208/230 ±10% (3Ø 208/230V)
R
T S
Noise filter input (upper part)
Troubleshooting Guide
Main Reasons
LGE Internal Use Only