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NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
Symptom
The temperature control
of a NetCol8000-C is
abnormal.
The NetCol8000-C leaks
at the bottom
Drainage capacity of the
NetCol8000-C decreases.
The heating function
fails.
No water is supplied to
the water inlet solenoid
valve of the humidifier.
Issue 06 (2020-01-13)
Possible Cause
The valve plug of the chilled
water valve is reversely installed.
The chilled water valve is stuck.
The temperature and humidity
thresholds are improper.
Alarms, such as water overflow
and no refrigerant output, are
generated.
The chilled water valve is faulty
or the cable connection is
incorrect.
The thermal insulation foam of the
NetCol8000-C is damaged.
The drainpipe is blocked.
The pipes leak.
The water inlet solenoid valve
cannot be closed.
The drainpipe is bend or trapped.
The electric heater temperature
switch is being protected.
An electric heater is burnt out.
The upstream water supply is
faulty or the water pressure is
below the lower threshold.
The water inlet solenoid valve is
blocked or faulty.
The cable to the water inlet
solenoid valve is incorrectly
connected.
The humidifier float jams and fails
to fall down, or the cable
connection is faulty.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Reference Solution
Check that the chilled water valve plug is
correctly installed.
Replace the chilled water valve.
Adjust the temperature and humidity
thresholds.
Check the alarm causes and clear the alarm
manually.
Replace the actuator or reconnect the cable.
Check whether thermal insulation foam of the
NetCol8000-C is securely installed and repair
the damaged thermal insulation tube.
Ensure that the drainpipes are not over-bent
and the drainpipe connectors are securely
installed.
Check the pipes and weld the pipe or fasten
related bolts if the pipes leak.
Replace the water inlet solenoid valve.
Check that drainpipes are free from bends and
traps. Ensure that the height difference for
drainage is enough.
Check whether the temperature switch is
faulty. Replace the faulty switch.
Disconnect the power supply and check
whether the electric heater is damaged by
checking the electric heater resistance
properties with an ohmmeter.
Restore the water supply.
Replace the water inlet solenoid valve.
Reconnect the cable.
Manually operate the float or reconnect the
cable.
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