Troubleshooting Guide
92
Universal System Air Conditioner
4) Troubleshooting CH05, CH53
05
/
53
Title
Communication
(Indoor
→
Outdoor)
• Communication poorly
• Power input AC 220V. (Outdoor, Indoor)
• The connector for transmission is disconnected.
• The connecting wires are misconnected.
• The communication line is shorted at GND.
• Transmission circuit of outdoor PCB is abnormal.
• Transmission circuit of indoor PCB is abnormal.
Display
code
Title
Cause of error
Check point & Normal condition
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
Ω
)
4. Check the connector for communication is correctly connect-
ed.
5. 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.
6. If all indoor unit is displayed CH05 but outdoor PCB not
display
CH53 : Check the CN_COM and CN_POWER is correctly
connected.
Содержание ABNH366GLAC
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