ABB Adjustable Speed AC Drive ACS550-01-075A-2

Warning: Always ensure power is disconnected before starting the procedure.

If the environment is dusty, increase the frequency of heatsink checks.

Clean compressed air blown from bottom to top?

Vacuum cleaner used at the air outlet to trap the dust?

Note: If there is a risk of the dust entering adjoining equipment, perform the cleaning in another room.

Warning: Ensure power is removed from the drive before starting the procedure

Barbed retaining clips released

Fan housing removed from the drive

Fan wire harness is toward the front

Notched housing barb is located in the right-rear corner

Fan failure can be predicted by the increasing noise from fan bearings and the gradual rise in the heatsink temperature in spite of heatsink cleaning.

If the drive is operated in a critical part of a process, fan replacement is recommended once these symptoms start appearing.

Replacement fans are available from ABB. Do not use other than ABB specified spare parts.

1. Remove power from the drive.

• R1, R2: Press together the retaining clips on the fan cover sides, and lift.

• R3, R4: Press in on the lever located on the left side of the fan mount, and rotate the fan up and out.