Bryant 619AHB Series Service Manual page 26

SG-619AHB-01: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)
Malfunction Decision Conditions
When the voltage signals, the IPM sends an abnormal message to the compressor drive chip. The display LED displays "P0"and the air
conditioner powers off.
Possible Causes:
• Wiring mistake
• IPM malfunction
• Outdoor fan assembly faulty
• Compressor malfunction
• Outdoor PCB faulty
Troubleshooting
Check the wiring between the main
PCB and the compressor.
Check the outdoor fan and the
outdoor unit ventilation.
Check the compressor resistance values.
Replace the outdoor main PCB.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
No
Check the IPM.
Yes
Yes
Yes
Correct the connection or replace
Yes
the wires and connectors.
Replace the IPM board or replace
No
the main PCB.
Refer to the
Fan Speed out of Control
No
Malfunction solution.
No Replace the compressor.
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