3. Alarms and
Troubleshooting
3.1 Alarm, cooker hood
If the ventilation unit controlled by a cooker
hood malfunctions, all signal lamps on the
cooker hood’s front glass light three times at
one minute intervals. Contact an authorised
service company.
3.2 Alarm, control panel
Any disruptions to the function of the ventila-
tion unit are indicated by symbols on the
upper row of the base display. If there is an
active alarm in the system, the screen leaves
its standby mode and returns to full bright-
ness and does not enter standby mode again
as long as the alarm is active. The symbol for
an active alarm is . The condition that has
caused the alarm is shown by the “Alarm”
item on the main menu. A so-called info-
alarm remains on the screen when the active
fault condition ceases. The Info alarm can
be reset from “Alarm” on the main menu.
Status Alarms Action
T1...T8 sensor fault Contact a service company. The ventilation unit runs in a
restricted operating mode.
Reheater error Contact a service company! Check the function of the air
heater for reheating and preheating.
Preheater error Contact a service company! Check the function of the air
heater for preheating.
Freeze risk water-
heated air heater
Ensure that the circulation pump in the waterborne heating
system is running and that the water supply to the ventilation
unit’s heating coil is hot enough.
Fault supply air fan Contact a service company.
Fault extract air fan Contact a service company.
Contact fault Restart the ventilation unit. Contact the service company if the
error persists.
External emergency
stop/fire alarm
The alarm clears automatically when the external emergency
stop or the fire alarm ceases. No info alarm remains afterwards.
Service reminder Service the ventilation unit and acknowledge the service
reminder.
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