DOL 38 Frequency Converter
Technical User Guide
29
5 Maintenance instructions
Remember to disconnect the fan at the power supply isolator before maintenance and
cleaning.
Check at least once a year that blades and suspension units are still intact. Call service in case of abnormal
noise and vibration.
Only authorized personnel may carry out repairs
5.1 Cleaning
5.1.1 Fan
Clean the fan at regular intervals to allow unobstructed air passage.
1.
Clean the ventilation duct.
When washing the inside of the ducts, fan blades must stand still. Remember that fans do not
stand high-pressure cleaning.
If the inside of the duct needs to be cleaned extra thoroughly SKOV A/S recommends washing
from above.
2.
When washing the fan, the fan blades must turn around.
Remember that fans do not stand high-pressure cleaning.
3.
It is recommended that the fan run at 100% for at least one hour after cleaning, in order to dry
off any moisture in the fan. If the fan has a tailstock screw in the drain hole it can be removed in
this hour.
5.1.2 Motor controller/frequency converter
To ensure sufficient cooling, keep the cooling ribs on the controller dust-free, e.g., using compressed air.
Clean the product with a cloth that has been wrung out almost dry in water and avoid using:
• high-pressure cleaner
• solvents
• corrosive/caustic agents
5.2 Recycling/Disposal
Products suitable for recycling are marked with a pictogram.
It must be possible for customers to deliver the products to local collection sites/recycling stations in accordance
with local instructions. The recycling station will then arrange for further transport to a certified plant for reuse,
recovery and recycling.
Summary of Contents for DOL 38
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