Common Faults; Varistor; Gas Discharge Tube; Circuit Breaker - Huawei TP48200A-D17B3 Troubleshooting Manual

TP48200A-D17B3
Troubleshooting Guide
This chapter describes the troubleshooting methods for the components in the power system,
such as PSUs, circuit breakers, contactors, and the signal transfer board.

5.1 Varistor

You can determine that a varistor is damaged if its appearance is burnt or broken.

5.2 Gas Discharge Tube

Check the resistance at both ends of the gas discharge tube. In normal cases, the resistance is
infinitely great. If the resistance is very small, the gas discharge tube is damaged.

5.3 Circuit Breaker

The circuit breaker fails typically due to overcurrent or short circuits. Check whether the
switch of the circuit breaker is placed between ON and OFF. If yes, switch the circuit breaker
to OFF and then to ON. If the fault persists, the circuit breaker is damaged.
Issue 03 (2013-05-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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Common Faults

5 Common Faults
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