A005_C: Air Handler Communication Failure
Status
This is a critical alarm. Nothing will run until this is resolved.
Description
The air handler, at one time had communicated with the thermostat but something happened to the communication and now the thermostat cannot identify or control the air handler.
Cause
1. Loose or damaged wire or connection in the EcoNet bus.
2. Mis-wired during service.
3. Defective air handler control board (unlikely).
Solution
1. Check and correct wiring.
2. Check and correct wiring.
3. Check for proper voltages at the communicating terminals. (Click back to go to air handler model and communication). Replace air handler control board.
