Over Voltage Or Too Low Voltage Protection Diagnosis And Solution - Carrier 38MHRC Service Manual

DIAGNOSIS AND SOLUTION (CONT)
Over voltage or too low voltage protection diagnosis and solution (P1)
Description: An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Possible causes:
• Power supply problems
• System leak or block
• Faulty PCB
Troubleshooting
Check the power supply.
Check the connections and wires.
Check the voltage between P and N.
Replace the reactor.
NOTE: Measure the DC voltage between the P and N port. The normal value should be around 310V.
44
Yes
Yes
Yes
Check the reactor.
Yes
Fig. 48 — Test
Specifications subject to change without notice.
Stop the unit.
No
Correct the connections or
No
replace the wires.
No
Replace the IPM board.
No Replace the outdoor main PCB.
SG-38MHRC-01