Before replacing the re cylinder, inform the related administration department of the
temporary downtime of the re extinguishing system. After the replacement, inform the
administration department that the system has become operational.
Procedure
Step 1 Switch o the active and standby power supplies to the re alarm control panel.
Figure 4-81 Switching
o the active and standby power supplies
Step 2 Disconnect the interconnection cables between the electromagnetic valve and the
re alarm control panel, as shown in Figure 4-82. Disconnect cables from the
electromagnetic valve, as shown in Figure 4-83.
FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario) 4 Parts Replacement
Issue 01 (2021-04-20) Copyright © Huawei Technologies Co., Ltd. 136
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