9 red flashes
Reversed line polarity or improper grounding
This code typically points to
- Incoming polarity reversed
- Transformer ground issue
- L1-neutral or chassis bond fault
Next checks to confirm
- Verify incoming polarity
- Verify transformer ground
- Verify chassis bond
Escalation
Clears when corrected.
Reset behavior
Self-clears once polarity/ground is correct.
Service Soon
Schedule repair