Huawei NetCol8000-E220 User Manual page 167

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Alar
m ID
A091
-01
Issue 06 (2020-08-19)
Alarm Alarm Name
Severit
y
WARNI Cold aisle low
NG temperature
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Probable Cause
1. The temperature
sensors or
temperature and
humidity sensors
are located in
inappropriate
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.
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.
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