34 ACH550 Installation, Operation and Maintenance Manual
ACH550-UH
Enclosure fan replacement – UL Type 12 enclosures
UL type 12 enclosures include an additional fan (or fans) to move air through the
enclosure.
Frame Sizes R1 to 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.
Frame Sizes R7/R8 – UL type 12 enclosures
The enclosure fan is located in the exhaust box on top of
the UL type 12 enclosure.
1. Remove the left and right filter frames of the exhaust fan
box by lifting them upwards.
2. Disconnect the fan’s electrical connector from the
cabinet roof (top right inside the cabinet).
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