Blower Unit And Thermal Sensor Test - Nortel Meridian 1 Manual

Blower unit and thermal sensor test

Use this procedure to test the NT8D52 Blower Unit and its interface to the
system monitor. This test should be performed on the blower unit when a
column is initially installed.
Note: In the steps below, if you fail to see an expected display code,
contact your Northern Telecom support representative.
1 In the front of the pedestal, set the blower unit circuit breaker, or power
switch, to OFF.
• The red LED at the top front of the column should light.
• The system terminal should display PWR0006 and BSD090.
Note: Some DC powered blower units such as the NT8D52DD may also
display PWR0005 and PWR0045.
2 Set the blower unit circuit breaker, or power switch, to ON.
• The column LED should go out.
• The system terminal should display PWR0046.
3 Use a screwdriver to loosen the retaining screws at the front of the blower
unit (see Figure 115) and pull the unit out until it is disconnected from
the pedestal.
Note: Do not pull the unit all the way out of the pedestal.
• The column LED should light.
• The system terminal should display PWR0006 and BSD090.
4 Reinstall the blower unit and tighten the retaining screws.
• The column LED should go out.
• The system terminal should display PWR0046.
Performing acceptance tests
System installation procedures
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