Troubleshooting Guide
- 92 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
25*
Master
251
Slave
252
Input Voltage high/low
Error
No.
Error Type
Error Point
Main Reasons
Input voltage is over limited
value of the product (173V
or less, 289V or more)
1. Input voltage abnormal (R~S/S~T/T~R)
2. Outdoor unit inverter PCB assembly dam-
age (input voltage sensing part)
■
Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Yes
Recheck power and installation condition
Check
R~S/S~T/T~R Phase voltage :460V
±
10% (3Ø 460V)
208/230V
±
10% (3Ø 208/230V)
→
Check connection condition and wiring if power is
abnormal
Is inverter PCB assembly normal?
No
Replace inverter PCB assembly
* Measuring input voltage
* Inverter PCB assembly power wiring
Summary of Contents for ARUN Series
Page 134: ...P NO MFL50459503 MAY 2008 ...