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CABINET (Cabinet Sensors)
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.
!
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.
555-233-123
Follow the guidelines in the table below:
Input
Impedance
Fan Analysis
VDC > 25V
Good
VDC < 25V
Short Circuit
DANGER:
48-volt power is present on the fan plug.
Action
Next Step
(AHD1 or Front Fan
failed)
Replace
Go to Step 3
Issue 4 May 2002
10-329
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Table of Contents
Troubleshooting
