User Manual
Alarms Testing – continued
SC4812ET BTS Optimization/ATP — CDMA LMF
Jan 2002
3-112
Multiple Rectifier Failure (Six
Rectifier System)
Table 3-61 gives instructions on testing multiple rectifier failure or
major alarm in a six rectifier system.
Table 3-61: Multiple Rectifier Failure or Major Alarm
Step Action
1 Replace one rectifier module previously removed and turn the AC breaker for this shelf, OFF.
2 Verify that a rectifier alarm is generated. Each of the two rectifier modules will lite a RED fail LED,
and the Meter Alarm Panel will indicate a major alarm (Rectifier Fail, Major and Minor Alarm).The
RECTIFIER FAIL LED will lite.
3 Verify that the LMF reports both alarm conditions. (BTS #29)
4 Turn the AC breaker for this shelf ON. Verify that all alarms have cleared.
5 Return all rectifier module to their original location. This completes the rectifier alarm tests on the
power cabinet.
Battery Over Temperature
Alarm (Optional)
Use special care to avoid damaging insulation on cables, or
damaging battery cases when using a power heat gun.
CAUTION
Table 3-62 gives instructions on testing the battery over temperature
alarm system.
Table 3-62: Battery Over Temperature Alarm
Step Action
1 Use a low powered heat gun and gently heat the battery over temperature sensor (see location in
Figure 3-24). Do Not hold the hot air gun closer than 7.6 cm (3 in.) to the sensor. This will avoid
burning the cable insulation.
2 When the sensor is heated to approximately 50° C, a battery Over Temperature alarm is generated.
NOTE
An audible click will sound as K1 contact engage and K2 contacts disengage.
3 Visually inspect the K1 and K2 relays to verify state changes. The LMF should be displaying correct
alarms. (BTS #22)
4 Verify that the CHARGE DISABLE LED (amber) on the Meter Alarm Panel and the BATTERY
MAIN LED (green) are both illuminated.
5 Switch the hot air gun to cool. Cool the sensor until the K1 and K2 contact return to normal position
(K1 open and K2 closed). Use the LMF verify that all alarms have cleared.
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