Nortel SONET AccessNode User Manual page 171

Procedure 8-3 (continued)
Replacing a rectifier
Step
5
6
7
8
9
10
11
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Action
Carefully slide the rectifier out of the shelf, and place it in the packing carton
from the replacement rectifier for shipping or storage.
Note: If only the cooling fan on the rectifier is defective, it can be replaced
according to the replacement procedure in Nortel Networks Practice
169-2071-500, Equipment Installation Operation and Maintenance for
MPR25 / MPR15 Series Single Phase –48 V, 25 A Switch Mode Rectifier
NT5C06 . This document is shipped inside the box with the new rectifier.
Make sure the ac and dc circuit breakers on the replacement rectifier are
switched to the OFF (down) position, then slide the unit firmly into the shelf,
resting it on top of the stored blank panel.
Replace the clamping bar and tighten the two captive screws.
Set the sense DIP switch for this rectifier to the ON position.
Switch the dc circuit breaker to the ON (up) position.
Switch the ac circuit breakers to the ON (up) position to power the rectifier.
Perform Procedure 8-4, Procedure 8-5, Procedure 8-6 and Procedure 8-7 in
order.
—end—
Testing the batteries and rectifiers 8-15