User Manual

Alarms Testing – continued

Jan 2002

3-111

SC4812ET BTS Optimization/ATP — CDMA LMF

Multiple Rectifier Failure

Table 3-59 gives instructions on testing multiple rectifier failure or major

alarm in a three rectifier system.

Table 3-59: Multiple Rectifier Failure or Major Alarm

Step Action

1 With the rectifier module still in the unused shelf position fromTable 3-58 test procedures, turn the

AC breaker for the 1st shelf OFF.

2 Verify that a rectifier alarm is generated. Each of the two rectifier modules will lite two RED fail LED

(DC and Power), and the Meter Alarm Panel and LMF will indicate a major alarm (Rectifier Fail and

Major Alarm). The RECTIFIER FAIL LED will lite.

3 Verify that the LMF reports both alarm conditions. (BTS #29, BTS #21, and BTS #24)

4 Turn the AC breaker for the 1st shelf ON. Verify that all alarms have cleared.

5 Return the rectifier module to its original location. This completes the alarm test on the power cabinet.

Single Rectifier Failure

(Six Rectifier System)

Table 3-60 gives instructions on testing single rectifier failure or minor

alarm in a six rectifier system.

Table 3-60: Single Rectifier Fail or Minor Alarm

Step Action

1 Remove two(2) rectifier modules from shelf #2.

2 Turn the AC breaker OFF, for shelf #2.

3 Verify that a rectifier fail alarm is generated. The single rectifier module will lite two RED fail LED

(DC and Power), and the Meter Alarm Panel and LMF will also indicate a minor alarm and rectifier

fail status. The RECTIFIER FAIL LED will lite.

4 Check that the LMF reports both of these alarm conditions. (BTS #24 and BTS #21)

5 Turn the AC breaker for this shelf ON and verify that Rectifier Fail and Minor Alarm conditions have

cleared.