Pin Signal Function
Pin 6 (green) NC -
Pin 7 (brown-white) NC -
Pin 8 (brown) 12V- 12- input
Step 7 Switch on the circuit breaker of the hydrogen detection system, and check
whether it is working properly.
If the hydrogen density displayed on the hydrogen detection system, the hydrogen detection
system is working properly.
----End
Follow-up Procedure
Dispose of the removed hydrogen detection system that is
conrmed faulty.
7.2.4.3 Replacing a Smoke Detector
Prerequisites
● Recommended tools and materials: Phillips screwdriver, insulation tape, step
ladder (2 m).
● A smoke detector needs to be replaced.
● A spare smoke detector of the same model is available and functional.
Procedure
Step 1 Rotate the smoke detector to remove it from the base.
Figure 7-13 Removing a smoke detector
Step 2 Remove the cables from the smoke detector and apply insulation measures such
as wrapping the cables with insulation tape to avoid hazards.
Step 3 Install a new smoke detector and reconnect the cables.
Step 4 Install the new smoke detector to the base by rotating it in a direction opposite to
Step 1.
iMaster NetEco
Device Installation and Commissioning Guide (Data
Center) 7 Device Maintenance
Issue 02 (2021-05-12) Copyright © Huawei Technologies Co., Ltd. 296
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