Nortel DMS-100 Series Maintenance Manual page 443

6 Shine a trouble light through the filter.
If light
is visible through the filter
is not visible through the filter
7 Install the filter in the grill again.
8 Install the filter again and grill assembly in the frame.
Go to Step 19.
9
Use the following information to determine your next action.
If filter part number
is A0344437
is P0558302
is P0623539
10 Get replacement filter material.
11 Trim a new filter to fit around the magnetic latches. Use the old filter as a
guide.
12 Install the filter and grill on the frame.
Go to step 19.
13 At an area outside the room that contains the switching system, vacuum the
filter.
14 Install the filter and grill on the frame.
Go to step 19.
15 At an area outside the room that holds the switching system, remove excess
dirt and lint. Rap dirty side down, or vacuum to remove excess dirt and lint.
16 Wash the filter in soap and water.
17 Rinse the filter. Allow the filter to dry.
Routine maintenance procedures 12-5
Inspecting cooling unit filters
DMS-100 Family SMS Maintenance Manual XPM10 and up
SMS
Do
step 7
step 9
Do
step 10
step 13
step 16
(continued)