Replacing Cooling Unit Ntrx91Aa - Nortel North American DMS-100 Instruction Manual

1-174 Trouble locating and clearing procedures (continued)

Replacing cooling unit NTRX91AA

Application
Use this procedure to replace a cooling unit (NTRX91AA) that has faults in
the following cabinetized frames:
•
•
•
•
Definition
Perform this procedure on a cooling unit that has faults. The illumination of
the FAN FAIL indicator on the front of the modular supervisory panel (MSP)
indicates a cooling unit that has faults.
Common procedures
There are no common procedures.
Action
This procedure contains a summary flowchart and a list of steps. Use the
flowchart to review the procedure. Follow the steps to perform the procedure.
297-8021-544 Standard 14.02 May 2001
NTMX89FA; cabinetized remote switching center/line card module
(CRSC/LCM)
NTMX89FB: cabinetized remote switching center/integrated services
digital network (CRSC/ISDN)
NTMX90AB: Global Peripheral Platform (GPP) cabinet
NTRX89FC: cabinetized extension module (CEXT)