Nortel North American DMS-100 Instruction Manual page 220

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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 28-in. frame
DANGER
Risk of injury
Avoid contact with the fan blades that rotate.
Plug the electrical connectors into each of the inverter cards.
To determine if the replacement fan operates, turn ON the toggle on the
correct inverter card.
If the replacement fan
works
does not work
Turn OFF the switch on the inverter card. Slide the fan tray back into the
frame.
Turn ON the switches on the two inverter cards.
Mount the four screws on each side of the cooling unit.
Mount the screws on the side rails of the frame.
Turn OFF the override switch for the fan alarm.
For additional help, contact the next level of support.
The procedure is complete.
Do
step 19
step 24
1-205
(end)