FusionModule800 Smart Small Data Center
Maintenance Guide
4 Troubleshooting
Issue 02 (2016-11-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
25
Cat
ego
ry
Sympt
om
Possible Cause
Measure
pressure
is too
low.
Refrigerant leaks.
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.
The outdoor temperature
is too low.
No action is required.
The
compres
sor
suction
pressure
is too
low.
Refrigerant is
insufficient.
Fill more refrigerant.
Refrigerant leaks.
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.
The condensing pressure
is too low.
Check whether the outdoor temperature is
too low and whether the outdoor fan is under
control.
Liquid
is
returnin
g to the
compres
sor.
The indoor temperature
is too low.
Increase the temperature setting.
The air filter is dirty or
blocked.
Replace the air filter by following
instructions in
5.3.1.1 Replacing a Return Air
The electronic expansion
valve coil is faulty.
Replace the electronic expansion valve coil.
The external residual
pressure is too high, and
air flow decreases.
Check whether the air channels are blocked.
The
compres
sor
Liquid is returning to the
compressor.
Check whether the oil temperature and
discharge temperature are within the normal
range (70–100°C).
