Annual Maintenance; Alarm References - Huawei NetCol8000-C User Manual

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual

6.4 Annual Maintenance

Table 6-3 Annual maintenance
Maintenanc
e Item
T/H sensors
Heat
exchanger

6.5 Alarm References

Table 6-4 Alarm description (V200R001 software version)
Alar Alarm
m ID Name
a001 Return air
1/2/3/4 temp
invalid
Fresh air
temperature
invalid
Return air
damper
temp invalid
a002 Return air
high
temperature
alarm
Issue 06 (2020-01-13)
Operation
Check that the
temperature and
humidity readings are
correct as measured.
Check that no foreign
matter exists on the heat
exchanger surface.
Alarm Impact
Severi
ty
Major An alarm is
triggered.
Critical An alarm is
triggered.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting
If the temperature deviation is greater than
1° C or humidity deviation is greater than 5%,
calibrate or replace the humidity and
temperature sensor. For the calibration
method.
Remove foreign matter.
Possible Cause
1. The cables to the
temperature sensor are
loose or damaged.
2. The temperature sensor is
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.
6 System Operation and Maintenance
Solution
1. Check the cables to
the temperature
sensor.
2. Maintain or replace
the temperature
sensor.
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
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