Huawei NetCol8000-A Series User Manual page 169

NetCol8000-A(050, 100) In-room Air Cooled Smart
Cooling Product
User Manual
Symptom
Compressors generate
excessive noises.
The compressor
suction temperature is
too high.
An indoor fan fails to
start.
The humidification
function fails.
Issue 10 (2019-01-15)
Possible Cause
The external residual pressure
is too high, and air flow
decreases.
The air exhaust pressure is too
low.
Liquid returns in a compressor.
The lubricant is insufficient.
The transport sheet metal is not
removed from a compressor.
Suction temperature is higher
than 25° C.
Either the main circuit breaker
or the indoor fan circuit
breaker is not switched on.
An indoor fan contactor has an
abnormal pickup.
An indoor fan is protected by a
thermal overload relay.
An indoor fan is protected by
an internal high-temperature
guard.
An indoor fan is damaged.
The high water level detection
switch is being protected.
The infrared humidifier lamp
is burnt out.
Circuit breakers, fuses, or
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6 System Operation and Maintenance
Reference Solution
Check whether the air channels
are blocked.
Check whether the controller
and driver of the outdoor fan
work properly.
Check whether the oil
temperature and exhaust
temperature are within a
normal range.
Add the lubricant.
Remove the sheet metal.
Adjust the thermostatic
expansion valve or add
refrigerant.
Check the circuit breaker
status.
Check whether the main
control board sends signals to
the indoor fan contactor and
whether the contactor is
damaged.
Check the thermal overload
relay status and the fan current.
Check the high-temperature
protection switch status.
Measure the output voltage of
the indoor fan contactor. If the
voltage is in the range of main
input voltage with the 10%
deviation, the fan is damaged.
Replace the faulty indoor fan.
Check whether the high water
level detection switch is faulty.
Replace the faulty switch.
Measure the current of
humidifier. If no current exists,
the lamp of humidifier is
damaged. Replace the lamp.
Check the infrared humidifier
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