ACPro Y Series Troubleshooting Manual page 37

7.14 PC 08(Current overload protection)/PC 44(Outdoor unit zero speed protection)/ PC
46(Compressor speed has been out of control)/PC 49(Compressor overcurrent failure)
diagnosis and solution
Description: An abnormal current rise is detected by checking the specified current detection circuit.
Recommended parts to prepare:
• Connection wires
• Rectifier
• PFC circuit or reactor
• Blocked refrigeration piping system
• Pressure switch
• Outdoor fan
• IPM module board
• Outdoor PCB
Troubleshooting and repair:
Troubleshooting 37