Fire‑fighting smoke exhaust fans require periodic maintenance and protection after a period of operation.

1. Cut off the main power supply and place warning signs. Verify that the motor grounding of fire ventilation equipment is properly connected.
2. Check whether the insulation resistance of the fan motor meets specifications. Inspect main‑circuit connectors. Replace connectors if contacts are severely worn (worn down to one‑third of original thickness).
3. Inspect and replace gaskets and sealing fillers between mating surfaces.
4. Adjust the tension of the drive belt. Rotate the impeller manually to check for abnormal wobble. Examine and tighten all screws and couplings.
5. Apply proper lubricating oil to moving parts to guarantee flexibility and stability of couplings and bearings.
6. Verify that the damper of fire ventilation equipment operates reliably and flexibly, with clear opening‑angle indicators.
7. Clean the motor, impeller, filter and inner housing.
8. Check that components inside the remote‑control cabinet are in good condition.
9. Manually power on the unit. Confirm indicator lamps, voltage and ammeter readings are normal. Listen for unusual noise and check whether three‑phase current is balanced.
10. Perform three consecutive start‑stop cycles to test reliable remote‑control function of the fire‑fighting smoke exhaust fan.
11. Run a two‑hour trial operation. Monitor bearing temperature and motor temperature rise to ensure normal fan performance.

Content compiled by fire‑fighting smoke exhaust fan manufacturer.