Nortel North American DMS-100 Instruction Manual page 66

1-50 Trouble locating and clearing procedures (continued)
Repairing an NTBX63AA cooling unit on the bench top
26
27
28
29
30
31
32
33
297-8021-544 Standard 14.02 May 2001
An ohm meter that has an open circuit with the sail in the up position indicates
a sensor operates correctly. Reconnect the wiring to the sensor switch.
Repeat steps 22 to 26 to test all sensor switches.
Disconnect power to the unit.
Locate any sensor switch (or switches) that has faults, as determined in steps
24 to 27. Note the position of the switch (or switches).
Remove the sensor switch that has faults from the switch bracket.
Attach the replacement sensor switch to the switch bracket. Secure the
sensor in position with screws, nuts, and washers.
Reconnect the wiring to the sensor switch, as noted in step 22.
Repeat steps 29 to 32 for each sensor switch. Replace any switches that
have faults.
(continued)
Sensor switch
for the air flow
Fan