Allen Bradley Variable Frequency Drive PowerFlex 755

Rotate the red disconnect handle counter-clockwise to the OFF position.

Use a flat-head screwdriver to rotate the locks counter-clockwise to open the auxiliary circuit breaker door on the front cover.

Verify that all breakers are in the OFF position.

Verify that all incoming power is disconnected and discharged before removing the cover.

Disconnect the upstream power source and perform lock out / tag out on the upstream 400/480V AC.

Disconnect the wires using a flathead screwdriver

Attach the wires to the terminals

Remove wires from the input and output side of the main circuit breaker using a #5 hex key

Remove the two screws fastening the main circuit breaker to the enclosure using a Phillips screwdriver

Remove the two screws holding the circuit breaker shaft in the main circuit breaker assembly using a Phillips screwdriver

Remove the three screws from the rotary mechanism of the main circuit breaker using a miniature Phillips screwdriver

Remove the two screws connecting the rotary disconnect switch to the front cover using a T20 torque bit

Inspect the new main circuit breaker and/or rotary mechanism

Attach rotary mechanism of the main circuit breaker to the circuit breaker using three M3 x 36 mm screws and a miniature Phillips screwdriver

Remove the front cover from the drive

Squeeze the locking tabs and pull out the bottom of cover

Pull the cover down and away from the chassis

Lift the cradle until the latch engages

Consult PowerFlex 750-Series Fan Replacement Kits, publication RA-IN027

Follow the procedure to Remove Power on page 146

Follow instructions to Remove the Front Cover on page 148

Follow instructions to Replace PowerFlex Frame 2 Drive (1EA030) on page 156

Ensure majority of cables and wires remain connected

Was the heatsink fan successfully replaced?