Huawei NetCol5000-C Series User Manual page 122

NetCol5000-C(065, 080) In-row Chilled Water Smart
Cooling Product
User Manual
Alarm Alarm Name
ID
a051 Hot aisle high
temperature
alarm
a052 Supply air 1/2
temperature
invalid
a053 PSU 1/2 fault
alarm
a054 PSU 1/2
communication
interrupt alarm
Issue 07 (2020-03-16)
Alarm Impact
Severity
Critical Generates an
alarm
Major Generates an
alarm
Major Generates an
alarm
Major Generates an
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Cause
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 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.
1. The cables to the
temperature sensor are
loose or damaged.
2. The temperature
sensor is faulty.
The PSU is faulty.
1. The communications
cables of the PSU are
loose or damaged.
2. The PSU is faulty.
3. The communications
port of the main control
board is faulty.
Solution
chilled water.
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
chilled water.
7. Maintain or replace
the chilled water
valve.
1. Check the cables to
the temperature
sensor.
2. Maintain or replace
the temperature
sensor.
1. Maintain or replace
the PSU.
1. Check the
communications
cables of the PSU.
2. Maintain or replace
the PSU.
3. Maintain or replace
the main control
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