Huawei FusionModule800 Maintenance Manual page 31

FusionModule800 Smart Small Data Center
Maintenance Guide
Cat
ego
ry
Issue 02 (2016-11-15)
Sympt Possible Cause
om
pressure
Refrigerant leaks.
is too
low.
The outdoor temperature
is too low.
The Refrigerant is
insufficient.
compres
sor
Refrigerant leaks.
suction
pressure
is too
low.
The condensing pressure
is too low.
Liquid The indoor temperature
is is too low.
returnin
The air filter is dirty or
g to the
blocked.
compres
sor.
The electronic expansion
valve coil is faulty.
The external residual
pressure is too high, and
air flow decreases.
The Liquid is returning to the
compres compressor.
sor
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Measure
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 by following
instructions in 5.3.1.1 Replacing a Return Air
Filter.
Replace the electronic expansion valve coil.
Check whether the air channels are blocked.
Check whether the oil temperature and
discharge temperature are within the normal
range (70–100° C).
4 Troubleshooting
25