Service manual

41
HH
Check of HPS
• When the operation frequency does not go up from lowest frequency.
MUZ-GA60VA
-
MUZ-GA71VA
E3
Infinity
0"
No
Yes
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.
Reconnect CN681.
Turn ON power supply to the indoor and outdoor unit.
3 minutes later, start EMERGENCY OPERATION.
Is HPS protection displayed
immediately after compressor
starts?
Replace HPS.
Replace the electronic control P.C. board.
Normal
OB389F--2qxp 07.9.3 5:08 PM Page 41