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.
48
2.
If the rectifier is in position, remove the rectifier and reinstall it.
3.
If the alarm still exists, replace the rectifier.
4.2.22 AC SPD Alarm
Possible Causes
The AC SPD is faulty.
The AC SPD detection cable is disconnected.
Measures
1.
Check whether the AC SPD indication window turns red. If yes, replace the SPD.
2.
Check whether the AC SPD detection cable is disconnected. If yes, reconnect the cable.
4.2.23 DC SPD Alarm
Possible Causes
The DC SPD detection cable is disconnected.
The DC SPD is faulty.
Measures
1.
Check whether the DC SPD detection cable is disconnected. If yes, reconnect the cable.
2.
Check whether the DC SPD detection cable is disconnected. If no, replace the DC SPD.
4.3 Identifying Component Faults
4.3.1 Identifying AC SPD Faults
Check the color of the AC SPD indication window. Green indicates that the AC SPD is
normal. Red indicates the AC SPD is faulty.
4.3.2 Identifying Circuit Breaker Faults
The following lists main circuit breaker faults:
The circuit breaker cannot be switched to ON/OFF after the short circuit fault for its end
circuit is rectified.
When the circuit breaker is switched to ON and its input voltage is normal, the voltage
between the two ends of the circuit breaker exceeds 1 V.
The input voltage is normal, but the resistance between both ends of the circuit breaker is
less than 1 kΩ when the circuit breaker is OFF.
4.3.3 Identifying Rectifier Faults
A rectifier is damaged if any of the following conditions is not met:
