Nortel North American DMS-100 Instruction Manual page 226

7
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Replacing a fan in a 42-in. cabinet
Filler panel
Junction box
for the power cable
Filler panel
DANGER
Risk of injury
Electricity can arc when you throw the breaker. Wear eye
protection.
CAUTION
Possible loss of service
Before you throw the circuit breakers, make sure that you
disconnect power to the cooling unit. If you throw the wrong
breakers, you can disconnect power to a critical hardware
component and cause loss of service.
Frame
supervisory panel
Power distribution shelf
(breaker panel
assembly)
Distribution shelf for
auxiliary power
(optional/blanking panel)
1-211
(continued)