Fault rectification
Fault finding and repairs only permissible when carried out by qualified electricians.
Fault | Cause → Measure |
|---|---|
Fan performance inadequate. | Dirty filter. → Replace filter. Locking hook not engaged. → Engage fan insert correctly. Incorrect duct diameter. → Check diameter of the main duct. Supply air cross section is too small. → Increase the supply air cross section. |
No fan overrun. | Connect the fan as per the wiring diagram. |
Fan doesn’t start up. | Check whether the fan insert is correctly inserted. |
Fan is too loud. | Dirty filter. → Replace filter. Fan insert incorrectly installed. → Fit fan insert correctly. |
The main duct is dimensioned too small. | Re-calculate pressure losses. |
Additional consumers connected to terminal 4. | Damage to the unit if connected incorrectly. Do not connect additional consumers to terminal 4. The unit may only be connected according to the wiring diagrams (Wiring diagrams). |
If the fault persists or reoccurs: Disconnect the unit completely from the power supply. Let a qualified electrician determine the cause of the fault and eliminate it. If you have any question relating to troubleshooting: Service: +49 7720 6940.