Step 6 Weld a new EEV, and install the coil for the EEV.
Protect the surrounding components during the welding process.
Step 7 Inject nitrogen and preserve the pressure. After checking that the EEV and system
do not leak, perform vacuumization and inject refrigerant.
Step 8 After powering on the smart cooling product, log in to the ECC800-Pro WebUI as
user admin, choose Monitoring > Cooling > NetCol5000-A1 > Controls >
Control Information, set Startup/Shutdown control to ON, and click Submit.
Step 9 Choose Controls > Control Information, set Diagnostic mode to Enter, and click
Submit.
Step 10 Choose Running Parameters > Diagnostic Mode Parameters, set Comp manual
control to 3000 rpm, and click Submit. Choose Running Info > Compressor
Information and read the air suction pressure and air exhaust pressure. Check
that the air suction/exhaust pressure of the compressor is within the proper range.
Choose Running Info > Electronic Expansion Valve Information. Check that the
EEV suction overheating degree is within the proper range.
● The proper range of the suction pressure is 0.7–1.6 MPa, and the pressure ratio
(discharge pressure to suction pressure) is greater than 1.4.
● Table 6-9 lists the proper ranges of the air exhaust pressure.
● The proper range of the air suction superheat degree is 4°C to 15°C.
Table 6-9 Proper ranges of the air exhaust pressure
Outdoor Ambient Temperature
Exhaust Pressure Range
Below 15°C 1.5–2.5 MPa
15–35°C 1.5–3.1 MPa
35–45°C 2.5–3.8 MPa
Above 45°C 3.1–4.0 MPa
Step 11 Set Comp manual control to 0 rpm and click Submit.
Step 12 Choose Controls > Control Information, set Diagnostic mode to Exit, and click
Submit.
Step 13 Clear up the EEV total runtime.
● Method 1: Log in to the ECC800-Pro mobile phone or pad app as user admin.
a. Choose Home.
b. Tap the cabinet that houses the smart cooling product in the micro-
module view.
FusionModule800 Smart Small Data Center
User Manual 6 O&M
Issue 01 (2021-02-05) Copyright © Huawei Technologies Co., Ltd. 429
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