Ac Overvoltage Or Undervoltage; Dc Overvoltage Or Undervoltage; Charging Overcurrent - Huawei TP48200A-D17B3 Troubleshooting Manual

TP48200A-D17B3
Troubleshooting Guide

4.3.3 AC Overvoltage or Undervoltage

Possible Causes


Solution
Step 1 Check that the AC undervoltage or overvoltage alarm threshold is properly set.
Step 2 If the AC input is the mains supply, contact the mains supplier for troubleshooting. If the AC
input is from the D.G., check the D.G. by referring to the diesel generator user manual.
----End

4.3.4 DC Overvoltage or Undervoltage

Possible Cause
The PMU DC undervoltage or overvoltage threshold is not set properly.
Solution
Step 1 Check that the DC overvoltage or undervoltage alarm threshold is properly set.
Step 2 When the storage battery supplies power to the load, remove all the PSUs, and then insert the
PSUs one by one.
Step 3 If an overvoltage alarm is generated after a PSU is inserted, the voltage of the PSU exceeds
the upper threshold. Replace the PSU.
----End

4.3.5 Charging Overcurrent

Possible Causes


Solution
Step 1 Check that the PSU is installed properly.
Step 2 Check whether the communication cable between the PSU and the signal transfer board is
properly connected. If the cable is properly connected, restart the PSU.
Step 3 Check the battery route for short circuits or other faults.
Step 4 Check the batteries. Replace faulty batteries.
----End
Issue 03 (2013-05-06)
The PMU AC undervoltage or overvoltage alarm threshold is not set properly.
The mains supply or D.G. is faulty.
The communication between modules fails.
The load route or battery route is faulty.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
4 Troubleshooting
23