NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
6 System Operation and Maintenance
Copyright © Huawei Technologies Co., Ltd.
Return-
air 3
temp
invalid
1. Dirt or water exists
around the T/H sensor,
which leads to a
detection fault.
2. The T/H sensor is
faulty.
1. Remove dirt or water
from the T/H sensor.
2. Maintain or replace the
T/H sensor.
The alarm
is
generated
, and the
rotational
speed of
the
compress
or
increases.
1. The load is high or the
refrigeration capacity is
insufficient.
2. The return air temp is
higher than the
return-air HT alarm
thres during startup.
3. The ambient temp is
high.
4. The return-air HT alarm
thres is inappropriate.
5. The temp displayed is
different from the
actual temp.
1. Add more smart
cooling product units.
2. Check other causes if
the alarm persists after
startup.
3. Check the ambient
temp.
4. Adjust the return-air
HT alarm thres.
5. Calibrate or replace
the abnormal temp
sensors.
1. The load is low.
2. The ambient temp is
low.
3. The return-air LT alarm
thres is inappropriate.
4. The temp displayed is
different from the
actual temp.
1. Please consult Huawei
technical support.
2. Check the ambient
temp.
3. Adjust the return-air
LT alarm thres.
4. Calibrate or replace
the abnormal temp
sensors.
Return-
air 3
humid
invalid
1. The cables to the temp
sensor are loose or
damaged.
2. The temp sensor is
faulty.
1. Check the cables to the
temp sensor.
2. Maintain or replace the
temp sensor.
Return-
air 3
T/H brd
comm
failed
1. The cables to the T/H
sensor are loose or
damaged.
2. The DIP switch of the
T/H sensor is set
incorrectly.
3. The T/H sensor is
faulty.
4. The communication
port of the control
board is faulty.
1. Check the cables to the
T/H sensor.
2. Set the DIP switch of
the T/H sensor
correctly.
3. Maintain or replace the
T/H sensor.
4. Maintain or replace the
control board.
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