Nortel North American DMS-100 Instruction Manual page 73

Repairing and replacing NT3X90AA cooling units
At the back of the frame
14
At the cooling unit
15
Toggle switch
Inverter card
At the back of the frame
16
At the front of the cooling unit
17
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Unplug the connector at the back of the unit.
A harness requires replacement. Tighten any loose connections.
Reconnect the connector at the back of the unit.
Inspect the fan operation.
If the fan
works correctly, but did not
work in step 12
did not work correctly, and did
not work in step 12
Do
step 62
step 18
1-57
(continued)