Huawei NetCol5000-C Series User Manual page 126

NetCol5000-C(065, 080) In-row Chilled Water Smart
Cooling Product
User Manual
Alarm Alarm Name
ID
a098 Supply-water
low
temperature
alarm
a099 Return-water
temperature
invalid
a101 Chilled water
valve feedback
abnormal
alarm
a102 Indoor fan
overspeed
alarm
a104 In-cabinet
water overflow
alarm
Issue 07 (2020-03-16)
Alarm Impact
Severity
Warning Generates an
alarm
Major Generates an
alarm
Warning Generates an
alarm
Major Generates an
alarm
Critical Generates an
alarm and shuts
down the smart
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Cause
threshold is
inappropriate.
3. The supply and
return water pipes are
reversely installed.
4. The supply and
return water sensors are
reversely installed.
5. The supply water
temperature displayed
is different from the
actual temperature.
1. The temperature of
chilled water is lower
than the supply water
low temperature alarm
threshold.
2. The supply water
low temperature alarm
threshold is
inappropriate.
3. The supply water
temperature displayed
is different from the
actual temperature.
1. The cables to the
temperature sensor are
loose or damaged.
2. The temperature
sensor is faulty.
1. The cables to the
chilled water valve are
loose or damaged.
2. The chilled water
valve is faulty.
1. The cables to the
indoor fan are loose or
damaged.
2. The indoor fan is
faulty.
1. The water overflow
sensor detects water or
the sensor is faulty.
Solution
3. Exchange the
positions of the supply
and return water
pipes.
4. Exchange the
positions of the supply
and return water
sensors.
5. Calibrate or replace
the supply water
temperature sensor.
1. Check the
temperature of
supplied chilled water.
2. Adjust the supply
water low temperature
alarm threshold.
3. Calibrate or replace
the supply water
temperature sensor.
1. Check the cables to
the temperature
sensor.
2. Maintain or replace
the temperature
sensor.
1. Check the control
cable connection to
the chilled water
valve.
2. Maintain or replace
the chilled water
valve.
1. Check the cables to
the indoor fan.
2. Maintain or replace
the indoor fan.
1. While configuring
the water overflow
sensor, check and
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