Nortel North American DMS-100 Instruction Manual page 83

Repairing and replacing NT3X90AB cooling units
10
At the PDC frame
11
12
13
At the front of the frame
14
15
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Do you have a blown fuse?
If
yes
no
WARNING
Incorrect fuse values
Use replacement fuses of the correct rating, or damage to the
equipment can result.
Replace the fuse in the PDC with a new one.
Replace the filter in the grill.
If the FAN FAIL lamp is
off
on
Turn OFF the FAN FAIL OVERRIDE switch.
Go to step 79.
If your company procedures
direct you to do repairs
do not direct you to do repairs
Remove the screws that secure the side rail covers to the frame.
Remove the eight screws that secure the brackets to the sides of the cooling
unit. To remove the screws, use a 5/16-inch ratchet and extension.
Do
step 11
step13
Do
step12
step13
Do
step 14
step 64
1-67
(continued)