Electromagnetic interference source (microwave, inverter, electronic start-up control...)

• Rectify or remove interference from an electromagnetic source.
• Use mains filters for problematic devices
• Performing a software update

Power supply to burner unit was faulty

• Switch off the appliance
• Restart the appliance after 10 sec.
• If the error still appears, contact the responsible service partner (make a note of the message on the display)