Step 5 Blow smoke towards the smoke detector using a smoke pistol until the smoke
detector indicator changes from blinking once every 6s to steady on. If a smoke
detector re alarm is triggered, the smoke detector is functional.
----End
7.2.4.4 Replacing a T/H Sensor
Prerequisites
● Recommended tools: Phillips screwdriver,
at-head screwdriver
● A T/H sensor needs to be replaced.
● A spare T/H sensor of the same model is available and functional.
Procedure
Step 1 Remove cables from the T/H sensor.
Step 2 Remove the T/H sensor from its base.
After removing cables, wrap exposed terminals with insulation tape and do not
block cable labels. If cable labels are blocked, cables may be connected incorrectly.
Step 3 Install a new T/H sensor onto the base.
Before removing a T/H sensor, remember the DIP switch setting on it. When you
install a new T/H sensor, you need to set the same DIP switch setting for the new
one.
Step 4 Reconnect cables to the new T/H sensor.
----End
7.2.4.5 Replacing a Region-type Water Sensor and Water Detection Cable
Prerequisites
● The water sensor needs to be replaced.
● A spare water sensor of the same model is available and functional.
Context
Prepare a water sensor or water detection cable of the same model.
A water sensor consists of a water detection cable, water detector, and conversion
cable. The water detection cable is laid out on the
oor, connecting to the water
iMaster NetEco
Device Installation and Commissioning Guide (Data
Center) 7 Device Maintenance
Issue 02 (2021-05-12) Copyright © Huawei Technologies Co., Ltd. 297
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