Fault messages
The tables below show potential faults and their causes. Column 3 Ackn. indicates whether or not the fault must be acknowledged after it has been eliminated.
- M: The fault elimination must be acknowledged manually.
RLS 1 WR: Press both arrow keys at the same time for 3 seconds.
RLS T2 WS: Acknowledge fault clearance on the display.
Only then is the ventilation unit operable again. - A: The correction of a temperature sensor malfunction is recognised by the control. The ventilation unit then continues to operate automatically.
Collective alarm:
The switching contact is also triggered with every fault message, provided it is configured as an alarm contact. Here, for example, a signal lamp can be connected that switches on automatically in the event of a fault.
The last 5 faults can be displayed with the date and time under Query/Faults .
Fault / Failure of | Message/Possible cause | Ackn. |
|---|---|---|
Supply air | Supply air fan fault Cable break Fan defective | M |
Exhaust air | Exhaust air fan fault Cable break Fan defective | M |
Communication with main control unit (touchscreen control unit) | Fault in communication with main control unit Cable break Main control unit defective Wiring incorrect | A |
Sensor: T-outside air upstream of EHE | Temperature sensor fault, upstream of EHE Cable break Temperature outside measuring range | A |
Sensor: T air inlet, unit | Unit inlet temperature sensor fault Cable break Temperature outside measuring range | A |
Sensor: T outgoing air | Outgoing air temperature sensor fault Cable break Temperature outside measuring range | A |
Sensor: T supply air | Supply air temperature sensor fault Cable break Temperature outside measuring range | A |
Sensor: T-room external | External room temp. sensor fault Cable break Temperature outside measuring range | A |
Sensor: T-room control unit | Temperature sensor control unit fault Cable break Temperature outside measuring range Main control unit defective | A |
Sensor: T-room bus | Temperature sensor KNX fault No data telegram for room temperature in the last 15 minutes | A |
System memory | System memory fault Checksum error of stored parameter, load commissioning data | M |
System bus | System bus fault Internal error, call in a trained specialist | A |
Combi sensor (exhaust air humidity/temperature) | Humidity/temperature sensor exhaust air fault Cable break Humidity/temperature outside measuring range | A |
Supply air temperature too cold | Supply air temperature too cold (T min ≤ 5 °C supply air temperature) Heat exchanger iced up PTC heat register defective | A |
Exhaust air temperature too cold | Exhaust air temperature too cold (T min ≤ 12 °C exhaust air temperature) Exhaust air in unit too cold, apartment cooled: | A |
Frost protection | Frost protection fault Cable break Heating module defective Temperature switch on the heat register defective | M |
External pre-heating | External pre-heating fault, external pre-heating defective | M |