Huawei NetCol5000-C Series User Manual page 121

NetCol5000-C(065, 080) In-row Chilled Water Smart
Cooling Product
User Manual
Alarm Alarm Name
ID
a049 Supply air low
temperature
alarm
a050 Cold aisle high
temperature
alarm
Issue 07 (2020-03-16)
Alarm Impact
Severity
Warning Generates an
alarm
Critical Generates an
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible 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.
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
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. 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
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