Service manual

36
1. Disconnect the connector CN681 in the electronic control P.C. board.
2. Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF.
Check the resistance between each terminal.
Is HPS protection displayed immediately after
compressor starts?
Replace HPS.
Replace the outdoor electronic
control P.C. board.
Normal
Infi nity
No
0 Ω
Yes
Reconnect CN681.
Turn ON power supply to the indoor and outdoor unit.
3 minutes later, start EMERGENCY OPERATION.
I Check of HPS
J Check of bus-bar voltage
•Check the voltage of power supply.
•Confi rm outdoor unit failure mode
recall function. (Refer to 10-2.2)
Blink 5 times
Confi rm LED1 indication lamp on
the outdoor electronic control P.C.
board.
Replace the power board.
Blink 9 times
Replace the outdoor elec-
tronic control P.C. board.
Turn OFF power supply before removing P.C. board.
Confi rm LED1 indication lamp
on the outdoor electronic con-
trol P.C. board.
Turn ON power supply. Start
operation.
Blink 6 times
Replace the outdoor elec-
tronic control P.C. board.
Lighting
Replace the outdoor elec-
tronic control P.C. board.
Blink 9 times
Replace the power board.
Confi rm LED1 indication lamp
on the outdoor electronic con-
trol P.C. board.
Turn ON power supply. Start
operation.
Normal.
Lighting Lighting