FusionModule1000A20 Prefabricated All-in-One Data
Center
Maintenance Guide
4 Parts Replacement
Issue 01 (2019-07-15)
Copyright © Huawei Technologies Co., Ltd.
35
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 4-5 shows how to
detect the voltages.
Figure 4-5
Detecting the voltages
Step 4
Hold down the faulty SPD module and pull it out.