LG Multi V5 Service Manual

170
MULTI V 5 Outdoor Unit Service Manual
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.
ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. 57
Error No. Description Details Causes
57
Master: 571
Slave 1: 572
Slave 2: 573
Communication
error between
outdoor unit main
PCB and inverter
PCB.
Outdoor unit inverter PCB is not receiving
signal from main PCB.
1. Bad connection between main and inverter
PCBs.
2. Communication wire noise effect.
3. The outdoor unit main PCB is damaged.
4. The outdoor unit inverter PCB is
damaged.
Are the communi-
cation cable connections
correct?
Recheck power and installation.
1. Check communication wiring.
2. Check connections.
ĺ5HZLUHLIHUURUVDUHIRXQG
No
Yes
After resetting the
power, does the error still
display?
Yes
No
Replace main PCB.
Is the inverter PCB
assembly correct?
Replace Inverter PCB.
No
Yes
Communication
LED
Communication
LED
Communication
LED
Communication LED
Fan Board Inverter Compressor
PCB 1
Inverter Compressor
PCB 2
Main PCB
Images here are representative of system components. Actual component appearance depends on model and system type.

LG Multi V5 Specifications

General

Brand	LG
Model	Multi V5
Category	Air Conditioner
Language	English