Instant Indoor Unit Checking Mode; Emergency Operation - LG ARUN Series Service Manual

4.2 Emergency operation

- If a compressor is out of order, the system can be run except the defective compressor by backup function.
I Automatic emergency operation(automatic back up function)
If outdoor unit detect comp defect during operation,, automatic back up mode is set.
1) Inverter compressor automatic emergency operation(refer to ** page)
2) Constant compressor automatic emergency operation(refer to ** page)
I Manual emergency operation(Manual back up function)
1) Check which compressor is broken.(refer to °∞Trouble Shooting Guide°±)
2) Turn off the power.
3) Set the dip S/W of defective outdoor unit.
- Inverter compressor defect : dip S/W No.3
- Unit defect : dip S/W No.4
4) Turn on the power.
Normal
Inv. comp.
Fail of Slave
CAUTION
Emergency operation with inverter compressor failure should not last 48 hours. ➔ It causes other
compressor failure.
During the emergency operation, cooling/heating capacity may be lower.
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MASTER SLAVE
INV C INV
MASTER SLAVE
INV C INV
C
C
- 33 -
Function
DIP switch of Slave1
ON ON
1 2 3 4 5 6 7 1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9 10 11 12 13 14
LGE Internal Use Only