222 ACH550-UH User’s Manual
Maintenance
Main Fan Replacement
The drive’s main cooling fan has a life span of about 60,000 operating hours at
maximum rated operating temperature and drive load. The expected life span
doubles for each 10 °C (18 °F) drop in the fan temperature (fan temperature is a
function of ambient temperatures and drive loads).
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.
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.
Frame Sizes R5 and R6
To replace the fan:
1. Remove power from drive.
2. Remove the screws attaching the fan.
3. Disconnect the fan cable.
4. Install the fan in reverse order.
5. Restore power.
X0021
3
4
2
X0022
Bottom View (R6)
2
3
Bottom View (R5)
2
3
X0023
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