Green receive LED off
No power or communications error
This code typically points to
- No power to unit
- Open fuse
- Communication error
Next checks to confirm
- Check circuit breakers and fuses
- Reset/replace as needed
- Reset network with LEARN button
- Check communication wires terminal 1/terminal 2
- Check for shorts in low-voltage wiring
Escalation
Network/power problem
Reset behavior
Clears after power/communication problem is corrected.
Urgent
Fix now