Service manual

68
14
Troubleshooting
Diagnostic Procedure for Check Code
Is wiring connector on
inverter P.C. board normal?
Check inverter P.C. board.
No
Yes
Modify connection of wiring
Is there an irregularity of
outdoor unit power source?
Check interface P.C. board.
Yes
No
Check power source voltage.
Modify power source line.
Check noise interference from outside, etc.
Check code Operation cause
[17] 1. Defective wiring of inverter P.C. board
Current detect circuit system alarm 2. Defective inverter P.C. board
Check code Operation cause
[18]
TA sensor open/short
TE1 sensor open/short
TE1 sensor open/short has been detected. Confirm sensor is not disconnected
(TE1 sensor: CN505), confirm circuit and resistance value characteristics of sensor.
When the sensors are normal, replace outdoor P.C. board.
Check code Operation cause
[1C] 1. Outdoor unit power source error
Extension IC, EEPROM alarm 2. Interface P.C. board error