Huawei FusionModule1000A40 Maintenance Manual page 51

FusionModule1000A40 Prefabricated All-in-One
Data Center
Maintenance Guide
Alarm Alarm
Indicator Type
Name
Fire In Zone Alert
2 alarm
Zone Fault/ Fault/
Test/ Isolatio
Disablemen n alarm
t 1
Zone Fault/ Fault/
Test/ Isolatio
Disablemen n alarm
t 2
Zone Fault/ Fault/
Test/ Isolatio
Disablemen n alarm
t 3
Extinguisha Isolatio
nt n alarm
Manual Isolatio
Release n alarm
1st Stage Isolatio
Contact n alarm
Issue 04 (2021-02-10)
Alarm System Action
Severity
Major the FIRE RELAY
port become
closed, while NC
and C become
open.
2. S3 is triggered
to output 24 V
DC voltage
when both
smoke and heat
detectors raise
alarms.
Meanwhile, NO
and C on the
2nd Stage port
become closed,
while NC and C
become open.
Minor If there is a fault,
NO and C on the
FAULT RELAY port
become closed,
while NC and C
Minor
become open.
Minor
Major The system has
entered the
extinguishant
releasing phase.
Major The system is
manually started to
enter the
extinguishant
releasing phase.
Major The S1 port has 24
V DC voltage
output.
Copyright © Huawei Technologies Co., Ltd.
4 Common Faults and Troubleshooting Measures
Possible
Causes
The smoke or
heat detector
in zone 2 raises
an alarm.
Zone 1 is
isolated, faulty,
or in test
mode.
Zone 2 is
isolated, faulty,
or in test
mode.
Zone 3 is
isolated, faulty,
or in test
mode.
Extinguishant
is in isolation
mode.
Manual
Release is in
isolation mode.
1st Stage
Contact is in
isolation mode.
Solution
Check the end
resistor, cable
connections, and
devices of the
relevant loop.
Reset relevant
devices to restore the
system to normal.
44