Huawei NetCol8000-C070 User Manual page 144

NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
Alar
m ID
A027
A042
A044
Issue 02 (2020-08-30)
Alarm Alarm Possible Cause
Name Severi
ty
Fresh air Warni 1. Air filters are blocked
filter ng or dirty.
blocked
2. The differential
alarm
pressure switch is faulty.
3. An inappropriate
threshold is set for the
differential pressure
switch.
4. The pressure tube of
the differential pressure
switch is blocked or
disconnected.
5. The cables to the
differential pressure
switch are loose or
damaged.
6. The air damper for the
air filter is faulty.
7. The air damper for the
air filter is not enabled.
Power Warni The power supply is cut
loss ng off.
alarm
Remote Critica 1. The remote shutdown
shutdow l dry contact is triggered.
n alarm
2. The cables to the
remote shutdown dry
contact are loose or
damaged.
Smoke Critica 1. Smoke is generated in
sensor l the equipment room.
alarm
2. The cables to the
smoke sensor are loose
or damaged.
3. The smoke sensor is
faulty.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Solution
1. Maintain or replace
the air filters.
2. Replace the
differential pressure
switch.
3. Adjust the threshold
set for the differential
pressure switch.
4. Dredge or replace
the pressure tube.
5. Check the cables to
the differential
pressure switch.
6. Maintain or replace
the air damper for the
air filter.
7. Enable the air
damper for the air
filter.
If power failure occurs
on the power system,
no maintenance is
needed. If it occurs in
other places, check the
power supply cables.
1. Check the status of
the remote shutdown
dry contact.
2. Check the cables to
the remote shutdown
dry contact.
1. Expel smoke from
the equipment room
and reset the smoke
sensor.
2. Check the cables to
the smoke sensor.
3. Maintain or replace
the smoke sensor.
136