1-290 ACH550-UH User’s Manual
Maintenance
3. Blow clean compressed air (not humid) from bottom to top and simultaneously use a
vacuum cleaner 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.
4. Replace the cooling fan.
5. Restore power.
Drive module fan replacement
The drive module fan cools the heatsink. 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.
To monitor the running time of the cooling fan, see Group 29: MAINTENANCE TRIG
on page 1-127.
Frame Sizes R1
…R4
To 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 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.
4. Disconnect the fan cable.
5. Install the fan in reverse order.
6. Restore power.
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