1-290 ACH550-UH User’s ManualMaintenance3. Blow clean compressed air (not humid) from bottom to top and simultaneously use avacuum cleaner at the air outlet to trap the dust.Note: If there is a risk of the dust entering adjoining equipment, perform the cleaningin another room.4. Replace the cooling fan.5. Restore power.Drive module fan replacementThe drive module fan cools the heatsink. Fan failure can be predicted by theincreasing noise from fan bearings and the gradual rise in the heatsink temperaturein spite of heatsink cleaning. If the drive is operated in a critical part of a process, fanreplacement is recommended once these symptoms start appearing. Replacementfans are available from ABB. Do not use other than ABB specified spare parts.To monitor the running time of the cooling fan, see Group 29: MAINTENANCE TRIGon page 1-127.Frame Sizes R1…R4To replace the fan:1. Remove power from drive.2. Remove drive cover.3. For Frame Size:• R1, R2: Press together the retaining clips on the fancover sides, and lift.• R3, R4: Press in on the lever located on the left sideof the fan mount, and rotate the fan up and out.4. Disconnect the fan cable.5. Install the fan in reverse order.6. Restore power.X0021342
