TP48120A-HD15A1, TP48120A-HD15A2,
TP48200A-HD15A1, and TP48200A-HD15A2 Telecom
Power
User Manual
4 Maintenance
Issue 03 (2020-01-04)
Copyright © Huawei Technologies Co., Ltd.
43
4.2.8 BLVD Disconnected
Possible Causes
An AC power failure occurs.
Batteries are manually disconnected.
The battery disconnection voltage is set too high on the SMU.
Rectifiers are faulty.
The system configuration is not proper.
Measures
1.
Check whether an AC power failure occurs. If yes, resume the AC power supply.
2.
Check whether batteries are manually disconnected. If yes, confirm the reason of the
manual disconnection, and reconnect the batteries after the operation.
3.
Check whether the battery disconnection voltage (43.2 V DC by default) is set too high
on the SMU. If yes, adjust it to a proper value.
4.
Check whether the power system capacity is insufficient for the loads due to rectifier
failures. If yes, replace the faulty rectifier.
5.
Check whether the load current is greater than the current power system capacity. If yes,
expand the power system capacity or reduce the load power.
4.2.9 Batt Loop Trip
Possible Causes
The battery circuit breaker trips or battery fuse detection cable is disconnected.
The battery circuit breaker trips or battery fuse is blown.
The contactor is faulty.
Measures
1.
Check whether the battery circuit breaker trips or battery fuse detection cable is
disconnected. If yes, reconnect the cable.
2.
Check whether the battery circuit breaker trips or battery fuse is blown. If yes, rectify the
battery loop fault and then switch on the circuit breaker or replace the fuse.
3.
Manually switch on or switch off the battery contactor and check the battery current
changes accordingly. If no, replace the contactor.
4.2.10 High Amb. Temp.
This alarm is generated only for the power system that has ambient temperature sensors installed.
Possible Causes
The ambient overtemperature alarm threshold is not set properly on the SMU.
The temperature control system is faulty in the cabinet where the ambient temperature
sensor is located.