Malfunctions, Warning and Error Messages
40 D53182 02/2024
Description Cause Action
Temperature alarm and TWB is displayed Temperature selector limiter (TWB) has
switched off the heating permanently.
■ Switch off the alarm by pressing the
confirmation button
■ Increase the difference between the
monitoring temperature and the set
point temperature – i.e. either increase
the max. value of the temperature
monitoring or reduce the set point
temperature
■ If the alarm persists: Notify customer
service
7.2 Malfunctions, Operating Problems and Unit Errors
Error description Cause of errors Rectifying errors
Displays are dark External power supply was interrupted.
■ Check the power supply
Miniature fuse, appliance fuse or power
module faulty.
■ Notify customer service
Displays do not activate Appliance locked by USER ID.
■ Unlock with USER ID
Appliance is in programme, timer or remote
control mode (“Write” or “Write + Alarm”
mode).
■ Wait for the programme or timer to end
or switch off the remote control
Appearance of displays suddenly changes Appliance is in the “wrong” mode.
■ Press the MENU key to switch to the
operating or menu mode
Error message T:E-3 in the temperature
display
Temperature working sensor faulty.
Monitoring sensor performs the measuring
function.
■ The appliance can continue to be
operated for a short time
■ Notify customer service as soon as
possible
Error message AI E-3 in the temperature
display
Temperature monitoring sensor faulty.
Working sensor performs the measuring
function.
■ The appliance can continue to be
operated for a short time
■ Notify customer service as soon as
possible
Error message E-3 in the temperature
display
Working and monitoring sensor faulty.
■ Switch off appliance
■ Remove load
■ Notify customer service
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