30 / E30
Indicates the control board may need to be replaced
This code typically points to
- Wiring to control board disconnected
- Faulty control board
- Electrical noise
Next checks to confirm
- Check wiring to control board
- Repair as needed
- Replace control board if necessary
Escalation
Outdoor fault indication
Reset behavior
Clears after wiring/board issue is corrected.
Urgent
Fix now