User's Manual
Alarms Testing68P09255A69-3
Aug 2002
1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x
PRELIMINARY
3-107
Multiple Rectifier Failure (Four Rectifier System)
Table 3-61 gives instructions on testing multiple rectifier failure or major
alarm in a four (4) rectifier system (two-carrier system).
Table 3-61: Multiple Rectifier Failure or Major Alarm, Two-Carrier System
Step Action
1
! CAUTION
Only perform this test if the rectifier current load displayed on the AMP indicator on the MAP is
125 amps or less. Sufficient current capability to support a greater load may not be available when
two rectifiers are removed from the bus.
On the ACLC, set the RECT. 2/4 circuit breaker to OFF.
- The DC and PWR LEDs should light red on the rectifiers in shelf positions 2 and 4.
- The MAJOR ALARM (red), MINOR ALARM (amber), and RECTIFIER FAIL (red) LEDs on
the MAP should light.
- The LMF should report an alarm condition as BTS Relay #21, BTS Relay #24, and BTS Relay
#29 contacts, respectively.
2 Set the RECT. 2/4 circuit breaker on the ACLC to ON.
- All alarm indications should clear on the rectifiers, MAP, and LMF.
3