T022_F
Main limit switch open (transient protection event)
This code typically points to
- Public booklet does not expose per-code list
- Overheating / airflow issues are implied by safety naming but not fully printed in accessible code table
Next checks to confirm
- Check airflow, limits, and blower operation
- Detailed OEM tree not exposed in accessible booklet snippet — use contractor app
Escalation
Transient event; escalates to A111_F one-hour lockout if repeated
Reset behavior
Clears automatically when limit resets and safety is restored.
Safety Critical
Immediate concern