Troubleshooting Guide

TroubleshootingCH05,CH53

Display

Title

Cause of error

Check point & Normal condition

code

 

 

 

 

 

 

 

 

 

 

• Power input AC 220V. (Outdoor, Indoor)

05

 

 

• The connector for transmission is disconnected.

Communication

 

• The connecting wires are misconnected.

/

• Communication poorly

• The GND1,2 is not connected at main GND.

53

(Indoor Outdoor)

 

• 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 2M)

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.

Service Manual 41

Page 41
Image 41
Heat Controller DMC36CA-1, DMC24CA-1 manual Troubleshooting CH05, CH53