Nortel DMS-100 Series Maintenance Manual page 442

12-4 Routine maintenance procedures
Inspecting cooling unit filters
SMS
(continued)
Inspecting cooling unit filters
At your current location
1
2
3
4
5
297-8231-550 Standard 09.01 August 1998
DANGER
Rotating fan blades
Do not reach in more than 6 in. beyond the upper lip
of the air-intake grill. If you reach in more than 6 in.,
your fingers can touch the rotating blades of the
cooling unit fans.
On the frame supervisory panel (FSP), set the FAN ALARM OVERRIDE switch
to ON.
If frame trim panels
overlap side edges of intake grill
do not overlap side edges of intake
grill
Remove the frame trim panels.
Grip both sides of the grill. Pull the grill towards you to detach the grill from the
magnetic catches.
Go to step 5.
Gently pry upper half of the grill away from the frame to remove the grill.
Go to a work area outside the room that holds the switching system. Clean the
grill with a dust cloth or vacuum cleaner.
If filter surfaces
appear dirty
appear clean
Do
step 2
step 4
Do
step 9
step 6