Huawei NetCol5000-A User Manual page 164

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Symptom
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.
The
humidifier
pump fails
to supply
water.
The water
overflows
the
NetCol5000-
A.
Issue 01 (2017-07-27)
Possible Cause
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 fans 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 humidifier float jams and fails
to fall down, or the cable
connection is faulty.
The humidifier pump is faulty or
the cable connection is incorrect.
The humidifier pump is blocked.
The humidifier pump is blocked
due to atmospheric pressure.
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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5 Operation and Maintenance
Solution
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.
Manually operate the float or
reconnect the cable.
Replace the humidifier pump or
reconnect the cable.
Replace the humidifier pump.
Restart the humidifier pump.
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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