ACS550 User’s Manual 213
Maintenance
Internal Enclosure Fan Replacement
IP 54 / UL Type 12 enclosures have an additional internal fan to circulate air inside
the enclosure.
Frame Sizes R1…R4
To replace the internal enclosure fan in frame sizes R1 to R4:
1. Remove power from drive.
2. Remove the front cover.
3. The housing that holds the fan in place has barbed
retaining clips at each corner. Press all four clips toward
the center to release the barbs.
4. When the clips/barbs are free, pull the housing up to
remove from the drive.
5. Disconnect the fan cable.
6. Install the fan in reverse order, noting that:
• The fan air flow is up (refer to arrow on fan).
• The fan wire harness is toward the front.
• The notched housing barb is located in the right-rear corner.
• The fan cable connects just forward of the fan at the top of the drive.
Frame Sizes R5 and R6
To replace the internal enclosure fan in frame sizes R5 or R6:
• Remove power from drive.
• Remove the front cover.
• Lift the fan out and disconnect the cable.
• Install the fan in reverse order.
• Restore power.
Capacitors
The drive intermediate circuit employs several electrolytic capacitors. Their life span
is from 35,000
…90,000 hours depending on drive loading and ambient temperature.
Capacitor life can be prolonged by lowering the ambient temperature.
It is not possible to predict a capacitor failure. Capacitor failure is usually followed by
a input power fuse failure or a fault trip. Contact ABB if capacitor failure is suspected.
Replacements for frame size R5 and R6 are available from ABB. Do not use other
than ABB specified spare parts.
4
3
5
FM
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