Huawei FusionModule 1000A20 Maintenance Manual page 69

FusionModule1000A20 Prefabricated All-in-One Data
Center
Maintenance Guide

While removing cables, label the cables with its corresponding terminal ports for later
connection.

As a terminal resistor is connected to the last horn strobe in the loop 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.
Figure 4-28 Removing cables from 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 cover.
Step 6 Switch on the input circuit breaker of the extinguishant control panel, and connect the battery
cables.
Step 7 Check that the new horn strobe is working properly.
1.
After the wiring terminals are disconnected from the electrical actuator, the extinguishant control panel
generates an alarm, which is normal.
2.
That the horn strobe is triggered indicates that the horn strobe works properly.
3.
4.
----End
Issue 01 (2019-07-15)
Disconnect the wiring terminals from the electrical actuator on the fire cylinder.
Press the manual gas release button on the extinguishant control panel.
Reset the manual gas release button.
Flip the key to Enable Control counterclockwise (rightward). Reset the extinguishant
control panel by pressing Reset on it. Then, reset key to Enable Control clockwise
(leftward).
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4 Parts Replacement
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