Nortel North American DMS-100 Instruction Manual page 250

Replacing an NT9X95 card in a cooling unit
18
19
At the back of the cabinet
20
21
22
At the front of PDC
23
At the front of CPDC
24
At the front of the cabinet
25
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Slide the electronic module back in until the module touches the cooling unit
backplate.
Reconnect the four electrical connectors you disconnected in step 12.
Note: To reconnect each connector, press the releases on the connector
top and insert the connector bottom until it locks in place. If you cannot
insert the connector bottom, turn it one-half turn and try to insert it again.
Insert the screws that fasten the electronic module back into the cooling unit
assembly. You removed these screws in step 10.
Reconnect the power connector you disconnected in step 11.
Determine if power for the cooling unit connects through a PDC or a CPDC.
If power for the the cooling unit
connects through a PDC
connects through a CPDC
Insert the cooling unit fuses into the front panel of the PDC. Push the fuse
cartridges straight into the front panel.
Go to step 25.
DANGER
Risk of injury
Electricity can arc when you throw a circuit breaker for the
cooling unit. Wear eye protection.
Throw the cooling unit circuit breakers.
Determine if all cooling unit fans work.
Note: If one or more of the cooling unit fans does not work, the fan failure
lamp turns on. The fan failure lamp is at the top of the cabinet between the
doors.
If
all fans work
any fans do not work
Do
step 23
step 24
Do
step 26
step 28
1-235
(continued)