Huawei NetCol8000-E220 User Manual page 125

NetCol8000-E220 Modular Indirect Evaporative Cooling
System
User Manual
Alarm Alarm
ID Severity
A003- WARNIN
01 G
A007- MAJOR
01
A007-
MAJOR
01
Issue 02 (2019-10-10)
Alarm
Probable Cause
Name
6. The chilled water flow is
insufficient, or the supply water
temperature is high.
7. The chilled water valve is stuck
or faulty.
Return air 1. The temperature sensors or
low temperature and humidity sensors
temperature are 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 air 2 1. The cables to the temperature
temp/humid and humidity sensor are loose or
sensor comm damaged.
failed
2. The DIP switch of the
temperature and humidity sensor is
set incorrectly.
3. The temperature and humidity
sensor is faulty.
4. The communications port of the
main control board is faulty.
Cold aisle 1 1. The cables to the temperature
temp/humid and humidity sensor are loose or
sensor comm damaged.
failed
2. The DIP switch of the
temperature and humidity sensor is
set incorrectly.
3. The temperature and humidity
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Solution
temperature and humidity
sensor.
6. Check the pressure and
temperature of chilled water.
7. Maintain or replace the
chilled water valve.
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.
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
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