Huawei FusionModule1000A20 Maintenance Manual page 108

FusionModule1000A20 Prefabricated All-in-One
Data Center
Maintenance Guide
Preparations
Tools: protective gloves, step ladder, Phillips screwdriver
Materials: spare smoke detector
Document: fire extinguishing device layout diagram (CE)
Skill requirement: fire engineer
Before replacing the smoke detector, inform the related administration
department of the temporary downtime of the fire control 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 Hold the smoke detector, and rotate it counterclockwise to remove it from the
base.
Figure 6-24 Removing a smoke sensor
Step 3 Remove cables from the base using a Phillips screwdriver.
Step 4 Remove the screws on the base using a Phillips screwdriver, and remove the base.
Step 5 Install the new base to the same position, and reconnect the cables.
Step 6 Insert the new smoke detector into the base, and rotate it clockwise until it locks
in.
Issue 03 (2022-12-15)
NO TICE
NO TE
As a terminal resistor is connected to the last smoke detector in the loop in parallel, remove
the terminal resistor from the faulty smoke detector, and connect the resistor to the new
smoke detector when you replace the smoke detector.
Copyright © Huawei Digital Power Technologies Co., Ltd.
6 Parts Replacement
101