Huawei NetCol5000-A050 User Manual page 255

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual
Symptom
The
compressor
generates
excessive
noises.
An indoor
fan fails to
start.
The
heating
function is
unavailable
.
No water is
supplied to
the water
inlet
solenoid
valve of
the
humidifier.
Water in
the smart
cooling
product
overflows.
Issue 08 (2021-09-17)
Possible Cause
The condensing pressure is too
low.
Liquid returns in a compressor.
Refrigerant oil is insufficient.
The transport sheet metal is
not removed from a
compressor.
The switch of the indoor fan is
not turned on.
An indoor fan is damaged.
The interconnection terminals
for the indoor fan are not
securely connected.
The electric heater
temperature switch is being
protected.
The electric heater is not
switched on.
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 drainpipe does not
connect to the pump, or the
lift between the drainpipe and
the water chiller is set to an
appropriate value.
The condensate pump is
faulty.
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10 Troubleshooting
Solution
Check the condenser.
Check whether the oil
temperature and discharge
temperature are within the
normal range.
Add refrigerant oil.
Remove the sheet metal.
Check the switch of the indoor
fan.
Replace the indoor fan.
Secure the interconnection
terminals again.
Check the temperature switch
and replace it if it is faulty.
Check the electric heater 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.
Ensure that the drainpipe is
properly connected to the pump
and that the lift of the drainpipe
is lower than 4 meters.
Replace the condensate pump.
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