Service manual

39
HH
Check of HPS
Infinity
0"
Yes
No
Start
1. Disconnect the connector CN681 in the electronic control P.C. board.
2. Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turned off.
Check the resistance between
each terminal.
Reconnect CN681.
Turn on power supply to the indoor and outdoor unit.
3 minutes later, starts EMERGENCY OPERATION.
Is HPS protection displayed
immediately after compressor
starts?
Replace HPS.
Replace the electronic control P.C. board.
Normal
• When the operation frequency does not go up from lowest frequency.
MUZ-GA71VA
OB389 --2qxp 05.1.26 18:15 Page 39