How to Maintain the Motor of an HVLS Fan

Why a schedule matters more than a procedure

To ensure the normal operation of an industrial large fan motor, normal use according to the operating procedures and normal monitoring during operation are not enough on their own. Regular inspections should be carried out so that some faults can be eliminated in time, preventing failures and keeping operation safe and reliable.

The interval between inspections should be set from the form of the motor together with the use environment. A clean office-like building and a dusty press shop do not deserve the same schedule.

The five checks

1. Clean the motor. Remove dust and sludge on the outside of the motor frame in time. If the use environment is dusty, it is best to clean it once a week.

2. Check and clean the motor terminals. Check whether the wiring screws of the junction box are loose or burnt.

3. Check the screws of each fixed part, including anchor screws, end cover screws and bearing cover screws. Tighten any loose nuts.

4. Check the transmission device. Check whether the pulley or coupling is strong, whether it is damaged and whether the installation is firm, and whether the belt and its coupling buckle are intact.

5. Check the starting equipment of the motor. Clean external dust and dirt in time, check whether there are burn marks on each wiring part and whether the grounding wire is in good condition.

What a direct-drive fan removes from this list

The Diamond industrial and commercial HVLS ranges use a permanent magnet direct-drive motor with no reduction gearbox. That removes the lubricating oil change and the oil contamination risk entirely, which is the basis of the free-maintenance description and the 20-year service life figure.

It does not remove the rest of the list. Dust still collects on the frame and on the blades, junction box terminals still work loose, and fixing screws still need checking. Those are the items worth putting on a planned maintenance system.