Huawei NetCol8000-A013 User Manual page 90

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (800 mm Width)
Cate Symptom Possible Cause
gory
The The refrigerant is insufficient.
compresso
The outdoor fan speed
r discharge
controller fails.
pressure is
too low.
Refrigerant leaks.
The outdoor temperature is too
low.
The Refrigerant is insufficient.
compresso
Refrigerant leaks.
r suction
pressure is
too low.
The condensing pressure is too
low.
Liquid is The indoor temperature is too
low.
returning
to the
The air filter is dirty or
compresso
blocked.
r.
The electronic expansion valve
coil is faulty.
Refrigerant has been charged
too much
The Liquid is returning to the
compresso compressor.
r generates
too much
Refrigerant oil is insufficient.
operating
noise. (It
is common
that the
compresso
r generates
much
noise
when it
shuts
down.)
Issue 05 (2019-12-20)
Measure
Fill more refrigerant.
Replace the fan speed controller.
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.
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
83