Nortel DMS-100 Series Maintenance Manual page 653

Summary of filter replacement in cooling unit
Secondary (diffuser) filter replacement in cooling unit
Set ECU fan
switch to OFF
Remove the
secondary air
filter
Clean or replace
the filter
Install the air
filter again
Set ECU fan
switch to ON
DMS-100 Family OPM Maintenance Manual XPM14 and up
OPM routine maintenance procedures
This flowchart summarizes the
procedure.
Use the instructions that follow
this flowchart to perform the
procedure.
End of procedure
13-51
OPM
(continued)