Nortel DMS-100 Series Maintenance Manual page 568

13-10 Star Remote System routine maintenance procedures
Fan cleaning and testing
SRMO
(end)
Fan cleaning and testing
At the SRMO site
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297-8353-550 Standard 05.01 March 2001
Loosen the two screws on the telephony subsystem (TSS) front cover and
open the cover.
Power down the fans by removing the fan fuse on the dc panel.
Use a slot screwdriver to loosen the three 1/4-turn locking screws. Remove
the protective cover from the fans and heater.
Use a Phillips screwdriver and remove the two screws that hold each fan.
Slide the fans back to free them from the screws.
Clean the blades of the fans.
Manually rotate the fans to see if the fan blades turn easily.
If fan blades
turn easily
do not turn easily
Install the fans and replace and tighten the two screws that hold the fans.
Replace the fan and heater protective cover.
Replace the fan fuse in the dc panel to supply power to the fans.
If it is too cold for the fans to be running in normal operation, use a heat gun
or blow dryer on the fan thermostat sensor at the top of the cabinet to turn on
the fans.
Look at the fans to see if they are operating correctly. Listen for any
roughness in fan operation.
IfFor each fan that is
operating correctly
not running, running roughly, or
else not operating correctly
Replace the fan with faults. Follow the "Fan replacement" procedure.
You have correctly completed this procedure.
Do
step 7
step 11
Do
step 12
step 11