Huawei FusionModule1000A40 Maintenance Manual page 135

FusionModule1000A40 Prefabricated All-in-One
Data Center
Maintenance Guide
Prerequisites
Tools: hex key, Phillips screwdriver, protective gloves, step ladder
Material: spare fire alarm bell
Document: fire extinguishing device layout diagram (CE)
Skill requirement: fire engineer
● Before replacing the fire alarm bell, inform the related administration
department of the temporary downtime of the fire extinguishing system. After
the replacement, inform the administration department that the system has
become operational.
Procedure
Step 1 Disconnect the battery cables, and switch off the input circuit breaker of the
extinguishant control panel.
Step 2 Remove screws securing the fire alarm bell using a hex key, and remove the cover.
Figure 5-73 Removing the fire alarm bell
Step 3 Remove the cables from the fire alarm bell.
Step 4 Unscrew the fire alarm bell base using a Phillips screwdriver, and remove the base.
Step 5 Install the new base in the same way, connect the cables, and install the cover.
Step 6 Switch on the input circuit breaker of the extinguishant control panel, and connect
the battery cables.
Issue 04 (2021-02-10)
NO TICE
NO TE
As a terminal resistor is connected to the last fire alarm bell in the loop in parallel, remove
the terminal resistor from the faulty fire alarm bell and connect the resistor to the new fire
alarm bell when you replace the fire alarm bell.
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5 Parts Replacement
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