F.91 — Function of affected extension in emergency mode (DIO electronics module communication error)

What does F.91 mean?

An affected extension is operating in emergency mode due to a communication error with the DIO electronics module. This means a component is not communicating correctly with the main unit.

• Connections to DIO electronics module faulty
• Connection to heat management unit faulty

Click steps to track your progress.

1. 1

   Reset the appliance.

2. 2

   Contact a qualified technician to check the connections to the DIO electronics module and the heat management unit.

3. 3

   Ensure the appliance has been reset correctly after the initial fault.