Huawei NetCol8000-C User Manual page 180

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
Alar Alarm
m ID Name
a003 Return air
low
temperature
alarm
a004 Hot aisle
humidity
invalid
Fresh air
humidity
invalid
Return air
Issue 06 (2020-01-13)
Alarm Impact
Severi
ty
Warnin An alarm is
g triggered.
Major An alarm is
triggered.
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
4. The high 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 chilled water flow is
insufficient, or the supply
water temperature is high.
7. The chilled water valve is
stuck or faulty.
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.
1. The cables to the
temperature sensor are
loose or damaged.
2. The temperature and
humidity sensor is faulty.
6 System Operation and Maintenance
Solution
exist if the alarm
persists in a long time
after startup.
4. Adjust the high
temperature alarm
threshold.
5. Calibrate or replace
the temperature sensor
or 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
sensor.
2. Maintain or replace
the temperature and
humidity sensor.
172