Danfoss Vent, Installation And Maintenance Instructions Manual

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8 VMBQE102
4 Operation and maintenance instructions
Filter maintenance
Replace or clean the filter as follows:
1. Cut the power to the product by turning off the switch underneath the control equipment.
2. Remove the inspection cover, marked ”FILTER”
3. The filter can now be accessed for cleaning, using a vacuum cleaner, or can be replaced.
4. We recommend replacing the filter once a year.
5. Reset the filter alarm (FL flashes) by holding in the – and + buttons for 3 seconds.
Fan maintenance
1. Before servicing, maintenance or repair the fan must be disconnected from the power supply (all pole
break) and the fan wheel must have stopped.
2. Beware of the fan’s weight at removal or when opening larger fans to prevent any injuries and damage.
3. The fan must be cleaned when necessary, but at least once a year, to maintain the capacity and to pre-
vent imbalance resulting in unnecessary bearing damage.
4. The fan bearings are maintenance free and must only be replaced if necessary.
5. Do not use a high-pressure washer or strong cleaning agents when cleaning the fan. Cleaning must be
carried out in such a way that the fan wheel’s balance weights do not rub and that the fan wheel is not
damaged.
6. Check that no unusual noise is heard from the fan.
Cleaning the fan
Unscrew the left front cover, then remove the two panel screws. Fold the fan panel down to access the fan
for cleaning. Use a vacuum cleaner with brush to clean the fan wheel.
Troubleshooting the fan
1. Check that the fan is supplied with voltage.
2. Interrupt the voltage and check that the fan is not blocked.
3. Check the thermal switch. If it has deployed, the cause of the overheating must be rectified to prevent
the fault occurring again.
4. Check that the operational capacitor is connected.
5. If the fan still does not work, first replace the capacitor.
6. If none of these remedies work, contact your fan supplier.