Troubleshooting CH05, CH53 | LG Electronics LCN240CP specification

LG Electronics LCN240CP service manual Troubleshooting CH05, CH53

Troubleshooting Guide

TroubleshootingCH05,CH53

Display	Title	Cause of error	Check point & Normal condition
code	Title	Cause of error	Check point & Normal condition
code

			• Power input AC 220V. (Outdoor, Indoor)
05			• The connector for transmission is disconnected.
05	Communication		• The connecting wires are misconnected.
/		• Communication poorly	• The connecting wires are misconnected.
/			• The GND1,2 is not connected at main GND.
53	(Indoor → Outdoor)		• The GND1,2 is not connected at main GND.
	(Indoor → Outdoor)		• The communication line is shorted at GND.
			• The communication line is shorted at GND.
			• Transmission circuit of outdoor PCB is abnormal.
			• Transmission circuit of indoor PCB is abnormal.

Check Point

1.Check the input power AC230V. (Outdoor, Indoor unit)

2.Check the communication wires are correctly connected.

→Adjust the connection of wire

→Confirm the wire of “Live”, “Neutral”

3.Check the resistance between communication line and GND. (Normal : Over 2MΩ)

4.Check the connector for communication is correctly connected.

5.Check the connection of GND1, GND2, and main GND.

6.If one indoor unit is operated normally, outdoor PCB is no problem.

→Check the another indoor unit.

* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.

42Ceiling Cassette Air Conditioner

LCN240CP specifications

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