Huawei FusionModule1000A20 Maintenance Manual page 123

FusionModule1000A20 CT Solution
Maintenance Guide
Step 2 Remove screws securing the fire alarm bell using a hex key, and remove the cover.
Figure 5-45 Removing a fire alarm bell
Step 3 Remove the cables from the fire alarm bell.
Step 4 Remove screws from 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.
Step 7 Check whether the new fire alarm bell is working properly.
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2.
3.
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Follow-up Procedure
Dispose of the removed fire alarm bell that is confirmed faulty.
Issue 01 (2019-02-25)
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.
Flip the key to Enable Control rightward, and set the access level of the extinguishant
control panel to 2.
Press Silence/Sound Alarm to start or abort the fire alarm bell.
If the alarm bell starts and aborts normally, and rings loud and clear when it is started, the alarm bell is
working properly.
Reset the key to Enable Control by flipping it leftward.
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5 Parts Replacement
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