Replacing Warning Signs (Ce) - Huawei FusionModule 1000A20 Maintenance Manual

FusionModule1000A20 Prefabricated All-in-One Data
Center
Maintenance Guide
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 heat detector into the base, and rotate it clockwise until it locks in.
Step 7 Switch on the input circuit breaker of the extinguishant control panel, and connect the cables
to the battery.
Step 8 Check whether the new heat detector is working properly.
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4.4.3 Replacing Warning Signs (CE)

Prerequisites
A spare warning sign indicator of the same model is available and functional.
Impact on the System
The fire extinguishing system stops working during the replacement.
Preparations
Tools: Phillips screwdriver, protective gloves, step ladder
Materials: spare warning sign indicator
Document: fire extinguishing device layout diagram (CE)
Skill requirement: fire engineer

Procedure
Step 1 Disconnect the battery cables, and switch off the input circuit breaker of the extinguishant
control panel.
Step 2 Loosen the screws securing the warning sign and its base using a Phillips screwdriver, and
remove the cover of the warning sign.
Issue 01 (2019-07-15)
As a terminal resistor is connected to the last heat detector in the loop in parallel, remove the terminal
resistor from the faulty heat detector, and connect the resistor to the new heat detector when you replace
the heat detector.
If the red indicator blinks once every 6s, the heat detector is working properly.
Before replacing the warning signs, inform the related administrative departments of the
temporary downtime of the fire extinguishing system. After the replacement, inform the
administration department that the system has become operational.
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4 Parts Replacement
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