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Error Codes
Due to our policy of continuous product innovation, some specifications may change without notification.
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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. 53 indicates there is a communication error between the outdoor unit and indoor unit(s). See LGMV to help determine which indoor
unit or units are not communicating with the outdoor unit.
• Does LGMV display the correct number of indoor units? If LGMV DOES NOT display the correct number of indoor units, find the missing
indoor unit or units and troubleshoot.
• If LGMV DOES displays the correct number of indoor units, but the outdoor unit still shows CH53, check the communication count line on
LGMV. Find the indoor unit that does not have a communication count increase—that indicates the indoor unit which is not communicating.
The indoor unit may have:
1. Wrong communication cable or power wiring connection(s).
2. A PCB malfunction.
3. Duplicate address numbers for indoor units (Error No. 53 will appear at the indoor unit).
Error No. 53, continued.
Wiring Error.
External PCB
Indoor Unit
Communication PCB
Main PCB
Images here are representative of system components. Actual compo-
nent appearance depends on model and system type.
• If communication in general is not functioning properly, then the
auto addressing procedure has not been performed yet or has not
been performed properly.
• Auto addressing must be performed after an indoor unit PCB has
been replaced. Also, if a central controller is installed, the central
controller address must be input.
• In addition to the information presented here, see also the trouble-
shooting procedure for Error No. 05.
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