York Heat Pump: YHM
Re: Fault Code 47
The fault and status codes for the YHM heat pump are displayed on the small control board mounted beneath the large inverter board.
Fault Code 47 = Fan Inverter IPM Fault
Qty | POSSIBLE CAUSE | ACTION |
1. Sudden Supply Voltage Change |
Check supply voltage to the outdoor unit. (If low or high, contact utility provider.) (Inverter is not designed for use with a generator.) (Brownout condition.) (Check for a cut or damaged wire short to ground.) |
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2. Sudden load change on the fan motor. |
Troubleshoot outdoor fan motor & blade. (Ensure they are in good working order.) Check fan harness and connectors. |
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1 |
3. Inverter internal damage. |
Change out the inverter drive. (Validate the fix. If the issue persists, reinstall the original inverter drive, and go to step 4.) |
4. Fan motor internal damage. |
Replace outdoor fan motor. (Validate the fix. If the issue persists, reinstall the original fan motor, and go to the last step.) |
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Last Step. If fault remains. |
Contact JCI Technical Services. |