Brand:
LG
Category: Air Conditioner
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Manual for MULTI V 5 - Troubleshooting and error codes + PDF Download
Uploaded: April 8, 2025, 1:57 p.m.
Warranty Summary
No warranty information is present in this service manual.
This service manual provides comprehensive information for the LG MULTI V 5 Variable Refrigerant Flow Outdoor Units. It covers safety precautions, installation procedures including wiring, operational details for cooling and heating modes, and troubleshooting guides. The manual includes refrigerant flow diagrams, functional descriptions of outdoor and heat recovery units, PCB settings, and error code tables to aid in diagnosing and resolving system issues. It emphasizes safety and proper procedures for installation, operation, and maintenance of the LG MULTI V 5 system.
Troubleshooting and error codes
| Error Code | Description | Details |
|---|---|---|
| 01 | Indoor unit return air or optional remote wall temperature sensor communications error. | Indoor unit air temperature sensor disconnected or shorted. (Check the wiring, connection on the indoor unit PCB, then check the thermistor.) |
| 02 | Indoor unit inlet pipe temperature sensor communication error. | Indoor unit inlet pipe temperature sensor is disconnected or shorted. (Check the connection on the indoor unit PCB, then check the thermistor.) |
| 03 | Communication error between zone controller and indoor unit. | Indoor unit PCB is not receiving communications signal from zone controller. |
| 04 | Indoor unit drain overflow error. | Drain pump and/or float switch could be malfunctioning. Also check drain line for obstructions. |
| 05 | Communication error between outdoor unit PCB and indoor unit PCB. | Indoor unit communications PCB is not receiving signal from outdoor unit communications PCB for more than 5 minutes. Check indoor unit PCB for issues. |
Troubleshooting and error codes
| Error Code | Description | Details |
|---|---|---|
| 01 | Indoor unit return air or optional remote wall temperature sensor communications error. | Indoor unit air temperature sensor disconnected or shorted. (Check the wiring, connection on the indoor unit PCB, then check the thermistor.) |
| 02 | Indoor unit inlet pipe temperature sensor communication error. | Indoor unit inlet pipe temperature sensor is disconnected or shorted. (Check the connection on the indoor unit PCB, then check the thermistor.) |
| 03 | Communication error between zone controller and indoor unit. | Indoor unit PCB is not receiving communications signal from zone controller. |
| 04 | Indoor unit drain overflow error. | Drain pump and/or float switch could be malfunctioning. Also check drain line for obstructions. |
| 05 | Communication error between outdoor unit PCB and indoor unit PCB. | Indoor unit communications PCB is not receiving signal from outdoor unit communications PCB for more than 5 minutes. Check indoor unit PCB for issues. |