Huawei FusionModule800 Quick Manual page 56

7. Commission the compressor. If required charge refrigerant, perform the following steps.
a. Close the high-pressure valve and low-pressure valve of the pressure gauge.
b. Take off the vacuum pump from the vacuumizing equipment, and replace the vacuum pump
with a refrigerant cylinder.
c. Slightly open the refrigerant cylinder valve and slightly loosen the connection nut on the
leather hose. Tighten the nut when cold air escapes out of the nut.
d. Put the refrigerant cylinder upside down on an electric balance. Set the reading on the
balance to zero.
e. Start the compressor and let it run for 10 minutes.
f. Open the low-pressure valve and refrigerant steel cylinder valve at the joint of the gas pipe
needle valve, and then charge refrigerant at the gas pipe needle valve.
g. Charge liquid refrigerant.
h. After the refrigerant is charged, close all pressure gauge valves and the refrigerant cylinder
valve.
i. Remove the refrigerant charging cooling product and install the bonnet.
If the R410A refrigerant is provided by Huawei, put the refrigerant cylinder upside down when
charging in the refrigerant. If the refrigerant is not provided by Huawei, check with the refrigerant
provider whether the cylinder has a siphon. If the cylinder has a siphon, stand the cylinder when
charging in refrigerant. If the cylinder has no siphon, put the cylinder upside down when charging
in refrigerant. These measures ensure that the refrigerant is charged in the liquid state.
On the Diagnostic Mode Parameters page, set Comp manual control to 3000 rpm.

Choose Running Info > Compressor Information and view the Suction pressure and

Discharge pressure to determine whether they are within normal ranges. The normal
suction pressure range is 0.7–1.6 MPa, and the ratio (air discharge pressure/air suction
pressure) is greater than 1.4. The normal discharge pressure range is listed in the
following table. Check the EEV suction overheating degree (normal range: 4–15°C) on
the Running Info > Electronic Expansion Valve Information page.
On the Diagnostic Mode Parameters page, set Comp manual control to 0 rpm.

8. On the Diagnostic Mode Parameters page, set Outdoor fan output man ctrl to 50% and
click Submit.
Check that the outdoor fan operates properly without alarms.

On the Diagnostic Mode Parameters page, set Outdoor fan output man ctrl to 0% and

click Submit.
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