Huawei NetCol8000-C070 User Manual page 138

NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
Alar
m ID
A003
A007
Issue 02 (2020-08-30)
Alarm Alarm Possible Cause
Name Severi
ty
Return Warni 1. The temperature
air low ng sensors or temperature
temperat and humidity sensors are
ure located in inappropriate
alarm positions.
2. The thermal load
power is low.
3. The ambient
temperature is below the
lower threshold.
4. The low temperature
alarm threshold is
inappropriate.
5. The value detected by
the temperature sensor
or temperature and
humidity sensor is
different from the actual
value.
6. The air filters are
blocked.
7. The chilled water valve
is stuck or faulty.
Return Major 1. The cables to the
air 1 temperature and
temp/ humidity sensor are loose
humid or damaged.
sensor
2. The DIP switch of the
comm
temperature and
failed
humidity sensor is set
incorrectly.
3. The temperature and
humidity sensor is faulty.
4. The communications
port of the main control
board is faulty.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Solution
1. Adjust the positions
of the temperature
sensors or temperature
and humidity sensors.
2. Contact Huawei
technical support.
3. Measure the
ambient temperature.
Check whether other
causes exist if the
alarm persists in a long
time after startup.
4. Adjust the low
temperature alarm
threshold.
5. Calibrate or replace
the temperature sensor
or temperature and
humidity sensor.
6. Maintain or replace
the air filters.
7. Maintain or replace
the chilled water valve.
1. Check the cables to
the temperature and
humidity sensor.
2. Set the DIP switch of
the temperature and
humidity sensor
correctly.
3. Maintain or replace
the temperature and
humidity sensor.
4. Maintain or replace
the main control
board.
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