Nortel DMS-100 Series Maintenance Manual page 624

13-22 OPM routine maintenance procedures
Testing dampers
OPM
(continued)
Testing dampers in an OPM
At the OPM cabinet
1
High
temperature
alarm
Low temperature
heater switch
2
297-8361-550 Standard 04.01 September 2000
To verify damper closure, cool the damper sensor with Freon to +5°C ± 2.8°Χ
(41°F ± 5°F). To verify damper opening +15°C ± 2.8°C (59°F ± 5°F), blow
warm air on the sensor.
BFU
Fuse Bay locking
panels knobs
LCA
Empty or
LCA-0
HIE
ECU
BAY 0
Bay locking
knobs
Determine if the damper opens and closes.
If the damper
opens and closes
does not open and close
High
temperature
alarm
B B
C C
C C
Rectifiers
and PCU
FSP
RMM
ECU
BAY 1
Damper control
Low temperature
sensors
heater switch
Do
step 4
step 3
Doors
switch
Low temperature alarm
sensors (each ECU)