Filter
Top Products
- 56 -
Only for training and service purposes
Part 4 Trouble Shooting
2) Troubleshooting CH05, CH53
05
/
53
Communication
(Indoor → Outdoor)
• Communication poorly
• Power input AC 208~230V. (Outdoor, Indoor)
• The connector for transmission is disconnected.
• The connecting wires are misconnected.
• The GND1,2 is not connected at main GND.
• The communication line is shorted at GND.
• Transmission circuit of outdoor PCB is abnormal.
• Transmission circuit of indoor PCB is abnormal.
Error
code
Title Cause of error Check point & Normal condition
Check Point
1.
Check the input power AC 208~230V. (Outdoor, Indoor unit)
2. Check that the communication wires are correctly
connected.
→ Adjust the connection of wire
→ Confirm the wire is either “Live”, “Neutral”
3. Check the resistance between communication line and
GND. (Normal : Over 2MΩ)
4. Check that the communication cable is correctly
connected.
5. Check the connection of GND1, GND2, and main GND.
6. Check to see if one of the indoor units in operating properly
and the outdoor PCB is operating correctly.
→ Check any other indoor units
* CH05 is displayed at indoor unit, CH53 is displayed at out-
door unit.