Nortel North American DMS-100 Instruction Manual page 96

Repairing and replacing NT3X90AF cooling units
43
For additional help, contact the next level of support.
44 The procedure is complete.
DMS-100 Family Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures
WARNING
Loss of frame cooling
Do not leave a cooling unit that has faults in the
frame. If you cannot repair the bad cooling unit
immediately, replace it with a unit that operates
correctly. Go to step 15 and follow the necessary
parts of the procedure.
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(end)