CABINET (Cabinet Sensors)
Issue 4 May 2002
10-329 555-233-123
Follow the guidelines in the table below:
3. To replace a fan located at the front of the switch cabinet, remove the fan
assembly cover by pulling the cover outward. To replace a fan located at
the rear of the switch cabinet, use a No. 10 slot screwdriver or 5/16-inch
(8mm) wrench and remove the panel covering the fan assembly.
4. Loosen and remove the retaining screw nearest the power plug on the
defective fan.
!
DANGER:
48-volt power is present on the fan plug.
5. Disconnect the power plug from the defective fan.
6. Loosen and remove the other retaining screw on the fan.
7. Remove the fan from the fan assembly.
8. Position the replacement fan and reconnect the fan power plug.
9. Insert and tighten the retaining screws.
10. Replace the fan assembly cover or panel.
Input
Impedance Fan Analysis Action Next Step
VDC > 25V Good (AHD1 or Front Fan
failed)
VDC < 25V Short Circuit Replace Go to Step 3
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