Huawei NetCol8000-C User Manual page 186

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
Alar Alarm
m ID Name
a049 Supply air
low
temperature
alarm
a050 Cold aisle
high
temperature
alarm
Issue 06 (2020-01-13)
Alarm Impact
Severi
ty
Warnin An alarm is
g triggered.
Critical An alarm is
triggered.
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
1. The temperature sensors or
temperature and humidity
sensors are located in
inappropriate positions.
2. The load is low.
3. The ambient temp is low.
4. The undertemperature
alarm threshold is
inappropriate.
5. The temp displayed is
different from the actual
temp.
6. The air filters are blocked.
7. The CW 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
high or the cooling capacity
is insufficient.
3. The ambient temperature
exceeds the upper
threshold.
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.
6 System Operation and Maintenance
Solution
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. Check other causes if
the alarm persists after
startup.
4. Adjust the
undertemperature
alarm threshold.
5. Calibrate or replace
the abnormal sensors.
6. Maintain or replace
the air filters.
7. Maintain or replace
the faulty CW valve.
1. Adjust the positions of
the temperature
sensors or temperature
and humidity sensors.
2. Add smart cooling
products or 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 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.
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