Huawei NetCol5000-C Series User Manual page 168

NetCol5000-C030 In-row Chilled Water Smart Cooling
Product
User Manual (Simple Configuration)
Symptom
A NetCol5000-C is
abnormal.
The humidity and
temperature sensor
cannot detect the
humidity and
temperature.
The air return
temperature is high
or the fan
rotational speed is
fast. (The
temperature
fluctuation exceeds
± 1° C.)
Condensate water
exists on the
surfaces of the
front or rear
panels.
Issue 09 (2020-01-10)
Possible Causes
1. The jumper cap of the
chilled water valve is
not connected to the
right position.
2. The valve plug of the
chilled water valve is
reversely installed.
3. The humidity detected
by the humidity and
temperature sensor is
larger than the actual
humidity, which results
in anti-condensation
protection being
triggered frequently for
the NetCol5000-C.
4. The temperature and
humidity set points are
improper.
5. Alarms, such as full
water, in-cabinet
overflow, smoke sensor,
and no refrigerant
output are generated.
1. Parameter settings on
the controller are
incorrect.
2. DIP switches of the
humidity and
temperature sensor are
incorrectly set.
3. The humidity and
temperature sensor is
faulty.
Proportional, Integral and
Derivative (PID) control
related parameters are not
set properly.
1. The operating
environment of the
NetCol5000-C is
excessively humid.
2. The temperature set
point is set to a much
smaller value.
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6 System Operation and Maintenance
Troubleshooting
water pan.
1. Check the "W1" jumper of the
chilled water valve controller.
Ensure that the jumper cap is on
the right two pins.
2. Check that the chilled water valve
plug is correctly installed.
3. Check whether the ambient
temperature of the humidity and
temperature sensor is too high.
Ensure that the humidity and
temperature sensor is located at a
proper position. If the position is
proper but the fault persists,
replace the humidity and
temperature sensor.
4. Adjust the temperature and
humidity set points.
5. Check the alarm causes and clear
the alarm manually.
1. Check that the humidity and
temperature sensor is enabled on
the controller.
2. Check that DIP switches of the
humidity and temperature sensor
map the corresponding aisle.
3. If the fault persists after the
preceding operations, replace the
humidity and temperature sensor.
Decrease the Kp value by 0.01 and do
not set Kp to a much smaller value.
Ensure that temperature fluctuation is
less than ± 1° C.
1. Enhance the airtightness of the
equipment room.
2. Adjust the temperature and
humidity set points.
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