Emergency Operation; Automatic Emergency Operation (Automatic Backup Function); Manual Emergency Operation (Manual Backup Function) - LG Multi V5 Service Manual

OTHER CONTROLS
Setting Optional Modes

Emergency Operation

If an inverter compressor is not operating, the system can still operate (except the defective compressor) by using one of two methods.

Automatic Emergency Operation (Automatic Backup Function)

If an outdoor unit detects an inverter compressor error during operation, the automatic backup mode is initiated.
1. Inverter 1 compressor automatic emergency operation.
2. Inverter 2 compressor automatic emergency operation.

Manual Emergency Operation (Manual Backup Function)

1. Verify which compressor is malfunctioning (refer to the Troubleshooting section in the back of this manual).
2. Turn off the power.
3. Set the DIP switch of the defective outdoor unit following the instructions below.
4. Turn on the power.
If Slave 1 Outdoor Unit Inverter Compressor Fails
MASTER SLAVE1
INV1 INV2 INV1
1. Ensure Slave 1 Outdoor Unit PCB No. 5 DIP Switch on DIP-
SW01 DIP switch bank is set to ON.
2.
button.
3.
button.
4.
button.
5.
Backup Mode Cancellation
• Do not run the system under emergency operation with an inverter compressor failure for more than 48 hours. It will cause compressor
failure within the other outdoor units.
• During the emergency operation, cooling / heating capacity will be reduced.
56
SLAVE2
INV2 INV1 INV2
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
MASTER SLAVE1
INV1 INV2 INV1
If Slave 2 Outdoor Unit Fails
1. Ensure Slave 2 Outdoor Unit PCB No. 5 DIP Switch on DIP-
SW01 DIP switch bank is set to ON.
2.
button.
3.
button.
4.
button.
5.
SLAVE2
INV2 INV1 INV2