TP48200A-D14A1 Telecom Power
User Manual
5 System Maintenance
Issue 04 (2019-12-20)
Copyright © Huawei Technologies Co., Ltd.
31
Fault Type
Fault Analysis
Handling Method
Rectifier module fault
Disconnection of the
load fuse
Load circuit breaker
set to OFF
1.
Check whether the load circuit breaker is set to OFF.
If it is set to OFF, set it to ON.
2.
If the circuit breaker is automatically set to OFF after
you set it to ON, check whether the load branch is
overloaded or short-circuited. Check and rectify the
load loop fault.
AC surge protector fault
AC surge protector
fault
1.
Check the observation window on the AC surge
protector. If the color of the window is red, replace
the surge protector. If the color is not red, check
whether the fault detection cables of the AC surge
protector are correctly connected or whether the
cables are in good condition. If the cables are not in
good condition, replace and reconnect them. If the
cable connection is proper, it indicates that the alarm
loop is faulty. Replace the PMU.
DC surge protector fault
DC surge protector
fault
1.
Check whether the fault detection cables of the DC
surge protector are correctly and securely connected.
If the cables are not correctly and securely
connected, reconnect them.
2.
If the cables are correctly connected, replace the DC
surge protector.
If you rectify the corresponding faults, the alarms in the PMU are automatically cleared and saved in
history alarm information.
After the PMU is replaced, set the parameters again.
The PMU and rectifier module are hot-swappable.
5.2.2 Troubleshooting Components
AC SPD
Observe the indication window on the surge protection module. If the indication window
turns red, the surge protection module is damaged. In this case, replace the surge protection
module. If the indication window remains green, the SPD runs properly.
Circuit Breaker
The circuit breaker fault is usually caused by overcurrent or short circuits. To check whether a
circuit break is faulty, perform the following steps:
Step 1
Switch the circuit breaker to the ON position.
Step 2
Measure the resistance at the two ends of the circuit breaker using a multimeter. If the
resistance is infinity, the circuit breaker is damaged.
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