Check level of sump, and fan ensure they are parallel to ground.

Check center pipe is vertical and sprinkler arms are all levelled, at right angles to center pipe.

Ensure no dirt/other foreign particles are present in sump, suction tank etc. Sweep clean/wash clean.

Rotate sprinkler with hand and ensure it is free.

Ensure fill top is even.

Ensure sprinkler arms are at a contrant level above the fills and that the arms do not rub against/ uneven fills, casing etc.

Ensure fan and motor assembly is free.

Check all bolts are tight and no loose parts noticed.

Fill water in sump and check and eliminate water leaks , if any.

Connect correct power (i.e 415V, 50Hz 3PH. AC ) supply to fan and check.

Direction of rotation of fan is correct and air is being sucked through screen above sump and discharged vertically upwards.

Vibrations are negligible.

Fan cable connection are made with lugs, and terminal cover gasket, is tight.

Establish water flow and check sprinkler rotates and check any unregulated by pass from sprinkler pipes.