Huawei NetCol8000-A045D User Manual page 227

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Symptom
discharge
temperatur
e is too
high.
The
compressor
discharge
pressure is
too low.
The
compressor
suction
temperatur
e is too
low or
liquid
returns.
The
compressor
generates
excessive
noises.
Issue 05 (2020-10-10)
Possible Cause
The outdoor unit is installed in
an inappropriate position.
(The outdoor unit should not
be exposed to direct sunlight
and must be installed at a
specified spacing according to
the installation guide.)
Air exists in the cooling
system.
Heat dissipation is poor
because of blockages in the
condenser.
An outdoor fan fails.
Refrigerant is insufficient.
The outdoor fan speed
controller fails.
Refrigerant is insufficient.
Refrigerant is leaking.
The refrigerant filled is
insufficient.
The indoor temperature is too
low.
Filters are clogged with dirt.
The external excess pressure is
too high, and air decreases.
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.
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9 Troubleshooting
Solution
Install the outdoor unit in a
correct position, without
exposure to direct sunlight and
with an appropriate spacing.
Exhaust air, and examine and
repair the pipeline.
Clean the condenser fins.
Check whether the outdoor fan
works.
Increase the amount of
refrigerant filled.
Replace the speed controller.
Increase the amount of
refrigerant filled.
Check the pipeline for any
leakage.
Add the refrigerant.
Change the temperature setting.
Replace the filters.
Check whether the air duct is
blocked.
Check the condenser.
Check whether the oil
temperature and exhaust
temperature are within a normal
range.
Add refrigerant oil.
Remove the sheet metal.
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