Fan type VEX 36 24 V / 5 A (VEX3624)

Impeller condition: inspect for corrosion, cracks, fouling, or imbalance on the non-sparking alloy or Noryl impeller at every maintenance interval

Bearing lubrication and condition: check for abnormal noise, vibration, or heat; lubricate or replace sealed bearings per manufacturer schedule

Motor insulation resistance: measure winding insulation with a megohmmeter to detect moisture ingress, particularly critical in marine environments

IP55 enclosure integrity: inspect gaskets, cable glands, and housing seams for corrosion or damage that could compromise ingress protection rating

Airflow performance check: measure actual delivery against rated m³/h; significant reduction indicates fouled ducting, worn impeller, or motor degradation

Direction of rotation: verify correct rotation direction after any electrical work, as ZB/ZA series rotation must be specified at order and incorrect rotation severely reduces airflow

Flexible duct connections and vibration mounts: inspect for cracking, loosening, or deterioration to prevent noise transmission and structural stress

Electrical connections and motor terminals: check for corrosion, loose terminals, and correct current draw against rated amperage (DC models: compare to rated A at rated voltage)