Huawei NetCol5000-C Series User Manual page 124

NetCol5000-C(065, 080) In-row Chilled Water Smart
Cooling Product
User Manual
Alarm Alarm Name
ID
a091 Cold aisle low
temperature
alarm
a092 Hot aisle low
temperature
alarm
Issue 07 (2020-03-16)
Alarm Impact
Severity
Warning Generates an
alarm
Warning 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 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.
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
116