TP48200A-DX12A1 Telecom Power
User Manual
4 Maintenance
Issue 07 (2019-11-15)
Copyright © Huawei Technologies Co., Ltd.
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2.
Check whether batteries are manually disconnected. If so, check with other maintenance
personnel whether the batteries can be reconnected.
3.
Check whether the battery disconnection voltage (43 V DC by default) has been set to a
very high value on the SMU. If so, adjust it to a normal value.
4.2.9 Batt Loop Trip
Possible Causes
The battery circuit breaker or fuse detection cable is loosely connected.
The battery circuit breaker has tripped or the battery fuse has blown.
The contactor is faulty.
Measures
1.
Check whether the battery circuit breaker or fuse detection cable is loosely connected. If
so, reconnect the cable.
2.
Check whether the battery circuit breaker has tripped or the battery fuse has blown. If so,
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 whether the battery
current changes accordingly. If not, replace the contactor.
4.2.10 Batt. High Temp.
This alarm is generated only for the power system that has a battery temperature sensor installed.
Possible Causes
The high battery temperature alarm threshold is incorrectly set.
The battery temperature control system is faulty.
The battery temperature sensor is faulty.
Measures
1.
Check whether the high battery temperature alarm threshold (50°C by default) is
correctly set. If not, set the threshold to the correct value.
2.
Check whether the battery temperature control system is faulty. If so, rectify the fault.
The alarm is cleared when the battery temperature falls within the allowed range.
3.
Check whether the battery temperature sensor is faulty. If so, replace the temperature
sensor.
4.2.11 Batt. Low Temp.
This alarm is generated only for the power system that has a battery temperature sensor installed.
Possible Causes
The low battery temperature alarm threshold is incorrectly set on the SMU.
The battery temperature control system is faulty.