York Heat Pump: YHM
Re: Flashing Code 8
Fault Code 8 = Inverter Communication Fault
The 24V Diagnostic Board communicates with the High Voltage Inverter Board.
| Qty | Possible Cause | Action |
| 3 | 1. No Line Voltage |
Check the power in and out of the unit-mounted breaker. |
|
2. |
||
|
3. |
||
| 1 |
4. Bad Control Board |
Replace the control board. If the problem persists, proceed to last step. |
|
Last Step. If fault remains. |
Contact JCI Technical Services. |