Cannot communicate with indoor unit — System cannot connect to the furnace or fan coil

Was bedeutet CANNOT COMMUNICATE WITH INDOOR UNIT ?

The Evolution Control is unable to establish communication with the main indoor heating or cooling equipment. This message appears during the initial power-up sequence and must be resolved for the system to function.

• Loose or damaged wiring on the ABCD bus
• Faulty indoor unit
• Faulty Evolution Control unit

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Check that all wiring connections to the indoor unit and the Evolution Control are secure.

2. 2

   Ensure the ABCD bus wiring is not damaged or kinked.

3. 3

   Try resetting the system by turning off power at the circuit breaker for 30 seconds, then turning it back on.