Huawei FusionModule1000A20 Maintenance Manual page 71

FusionModule1000A20 CT Solution
Maintenance Guide
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Impact on the System
None
Preparations
Tools: Phillips screwdriver, flat-head screwdriver, electroprobe
Material: spare SPD
Documents: PDC user manual
Skill requirement: electrician's work permit
Procedure
Step 1 Remove the protective panel of the SPD.
Avoid touching any charged body when removing the panel.
Step 2 Switch off the SPD circuit breaker.
Step 3 Detect the L1, L2, L3, and N voltages to the PE using an electrical tester pen, and verify that
the faulty SPD has no voltage before replacing the faulty SPD. Figure 5-2 shows how to
detect the voltages.
Figure 5-2 Detecting the voltages
Step 4 Hold down the faulty SPD module and pull it out.
Issue 01 (2019-02-25)
An SPD is faulty.
A spare SPD of the same model is available and functional.
Copyright © Huawei Technologies Co., Ltd.
5 Parts Replacement
64