Nortel DMS-100 Series Maintenance Manual page 661

Testing high temperature alarms in an OPM
At the OPM cabinet
1 To activate the high temperature alarm, blow hot air from a heat gun or a
blow-dryer at the high temperature sensor. Refer to the following figures for
the locations of the high temperature alarm sensors.
High
temperature
Fuse
alarm
panels
HIE
ECU
BAY 0
Low temperature
heater switch
Verify that the system generates an alarm. The sensor turns on at +75°C ±
2
2.8°C, (+167°F ± 5°F) and turns off at +65°C ± 2.8°Χ (+149°F ± 5°F).
Note: Set up a telephone link with the host office at a MAP display to
monitor the alarms that this procedure generates.
If
the system generates an alarm
High temperature alarms testing
Bay locking
knobs
B
LCA
C
C
Empty
or
LCA-0
Bay locking
Low temperature
knobs
heater switch
DMS-100 Family OPM Maintenance Manual XPM14 and up
OPM routine maintenance procedures
High
temperature
alarm
B
C
Rectifiers
C
and PCU
FSP
RMM
ECU
BAY 1
Damper
control
sensors
Do
step 4
13-59
OPM
(continued)
Doors
switch
Low temperature
alarm sensors
(each ECU)