Nortel North American DMS-100 Instruction Manual page 191

1-176 Trouble locating and clearing procedures (continued)
Replacing cooling unit NTRX91AA
Replacing cooling unit NTRX91AA
At your current location
1
2
3
4
5
297-8021-544 Standard 14.02 May 2001
DANGER
To prevent overheating
Do not turn off the cooling unit for longer than 30 mins.
To make sure that the cooling unit fans are off, remove the two fuses on the
faceplate of the modular supervisory panel (MSP).
Turn the two knobs on the front panel of the cooling unit counter-clockwise.
Slide the cooling unit out.
Slide in the new cooling unit (NTRX91AA) until both sides lock into place.
Replace the two fuses that you removed in step 1.
The procedure is complete.
(end)