Carrier DHMVHA - Voltage Protection; Over;Under Voltage Protection (PC01)

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32
DIAGNOSIS AND SOLUTION (CONT.)
Over voltage or Too Low Voltage Protection (PC01)
Troubleshooting
Fig. 30 — Test
Error Code PC01
Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Supposed causes
Power supply functions
System leakage or block
PCB faulty
Check the power supply.
Check the connections and wires.
Stop the unit.
No
Yes
No
Correct the connections or
replace the wires.
Yes
Replace the reactor.
Yes
No
Replace the IPM board.
Check the voltage between P and N.
Check the reactor.
Yes
No Replace the outdoor main PCB.