Huawei FusionDC1000A Maintenance Manual page 158

FusionDC1000A Prefabricated All-in-One Data
Center
Maintenance Guide (IT Scenario)
Skill requirement: fire engineer
Before replacing the horn strobe, inform the related administrative 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 Rotate the horn strobe cover counterclockwise and remove it.
Step 3 Remove cables from the horn strobe.
● While removing cables, label the cables with the corresponding terminal ports
for later connection.
● As a terminal resistor is connected to the last internal horn strobe in parallel,
remove the terminal resistor from the faulty horn strobe, and connect the
resistor to the new horn strobe when you replace the horn strobe.
Step 4 Remove screws from the horn strobe base using a Phillips screwdriver, and remove
the base.
Step 5 Install the new horn strobe in the same way, connect the cables, and install the
terminal resistor and cover.
Figure 4-98 Connecting cables
Step 6 Switch on the input circuit breaker of the extinguishant control panel, and connect
the battery cables.
Issue 01 (2021-04-20)
NO TICE
NO TICE
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4 Parts Replacement
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