83
14
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[17] 1. Defective wiring of inverter PC board
Current detection circuit alarm 2. Defective inverter PC board
Is wiring connector on inverter
PC board normal?
Modify connection of wiring
Check inverter PC board.
Yes
No
Check code Operation cause
[18]
Outdoor heat exchanger sensor (TE)
short circuit TE 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 PC board.
Check code Operation cause
[1C] 1. Outdoor unit power source error
Extension IC, EEPROM short circuit alarm 2. Interface PC board error.
Is there an irregularity of outdoor
unit power source?
Check power source voltage.
Modify power source line.
Check noise interference from outside, etc.
Check interface PC board.
Yes
No
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