Huawei NetCol8000-A013 User Manual page 90

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (600 mm Width)
Cate Sympto Possible Cause
gory m
The outdoor temperature is
too low.
The Refrigerant is insufficient.
compress
Refrigerant leaks.
or
suction
pressure
is too
low.
The condensing pressure is
too low.
Liquid is The indoor temperature is
returning too low.
to the
The air filter is dirty or
compress
blocked.
or.
The electronic expansion
valve coil is faulty.
Refrigerant has been
charged too much
The Liquid is returning to the
compress compressor.
or
generates
Refrigerant oil is
too much
insufficient.
operating
noise. (It
is
common
that the
compress
or
generates
much
noise
when it
shuts
down.)
Issue 02 (2020-11-09)
Measure
No action is required.
Fill more refrigerant.
Apply soapy water or use a halogen leak
detector to check for any leakage. If leaking
points are found, retrieve the refrigerant and
weld the leaking points again. Contact Huawei
technical support.
Check whether the outdoor temperature is too
low and whether the outdoor fan is under
control.
Increase the temperature setting.
Replace the air filter.
Replace the electronic expansion valve coil.
Reclaim part of refrigerant.
Check whether the suction superheat degree of
the EEV is within the normal ranges (normal
range of the suction superheat degree: 4–10°C).
Add refrigerant oil.
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5 System Operation and Maintenance
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