F.77 — Burner in a fault state (Data memory burner control unit)

What does F.77 mean?

The burner is in a fault state indicating an issue with the data memory of the Burner Control Unit (BCU). This can prevent the burner from storing or retrieving necessary operational data.

• Data memory of BCU burner control unit faulty

Click steps to track your progress.

1. 1

   Reset the appliance.

2. 2

   If the fault recurs, contact a qualified technician.

3. 3

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