Page 1 NetCol8000-A013 In-room Air Cooled Smart Cooling Product User Manual (600 mm Width) Issue Date 2022-11-25 HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Page 2 Notice The purchased products, services and features are stipulated by the contract made between Huawei Digital Power Technologies Co., Ltd. and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS"...
Page 3: About This Document
About This Document About This Document Purpose This document describes the NetCol8000-A013 in-room air cooled smart cooling product in terms of its overview, installation, commissioning, controller, system operation and maintenance, helping readers understand how to use and maintain the product.
Page 4 Issue 03 (2022-08-10) Updated 3.7 Securing an Indoor Unit. Updated B Base Drawings. Issue 02 (2020-11-09) Updated the safety information. Issue 01 (2019-09-18) This issue is the first official release. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 5: Table Of Contents
3.2.4 Pipe Support..................................38 3.2.5 Cables....................................38 3.3 Space Requirements................................39 3.3.1 Indoor Unit Space Requirements..........................39 3.3.2 Outdoor Unit Space Requirements..........................41 3.4 Layout Principles................................... 42 3.5 Holes Introduction................................44 Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 6 5.4.1.1 Replacing an Air Filter............................... 110 5.4.1.2 (Optional) Replacing an Electric Heater......................111 5.4.1.3 (Optional) Replacing a Wet Film Humidifier.....................112 5.4.1.4 Replacing an Indoor Fan............................114 5.4.1.5 Replacing a Main Control Board..........................115 Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 7 6.16 How Do I View the Current Versions?........................164 A Cooling System Layout...................... 166 B Base Drawings........................167 C Bracket Drawings........................ 169 D Electrical Diagrams......................171 E Acronyms and Abbreviations....................173 Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 8: Safety Information
Equipment damage due to force majeure such as earthquakes, floods, volcanic eruptions, debris flows, lightning strikes, fires, wars, armed conflicts, typhoons, hurricanes, tornadoes, and extreme weather conditions ● Operation beyond the conditions specified in this document Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 9: Personal Safety
D ANGER During operations, use dedicated insulated tools to prevent electric shocks or short circuits. The insulation and voltage resistance must comply with local laws, regulations, standards, and specifications. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 10 – Trained personnel: personnel who are trained in technology and safety, have required experience, are aware of possible hazards on themselves in Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 11: Electrical Safety
WARNING For the equipment that needs to be grounded, install the ground cable first when installing the equipment and remove the ground cable last when removing the equipment. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 12 (TNV) circuits. ● After the installation is complete, ensure that protective cases, insulation tubes, and other necessary items for all electrical components are in position to avoid electric shocks. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 13 ● Ensure that the slots and holes for routing cables are free from sharp edges, and that the positions where cables are routed through pipes or cable holes Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 14 When touching the equipment and handling boards, modules with exposed circuit boards, or application-specific integrated circuits (ASICs), observe ESD protection regulations and wear ESD clothing and ESD gloves or a well- grounded ESD wrist strap. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 16 All cable holes should be sealed. Seal the used cable holes with sealing putty. Seal the unused cable holes with the caps delivered with the equipment. The following figure shows the criteria for correct sealing with sealing putty. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 17: Mechanical Safety
Otherwise, tipping or falling cabinets may cause bodily injury and equipment damage. WARNING When pulling equipment out of a cabinet, be aware of unstable or heavy objects in the cabinet to prevent injury. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 18 Move a heavy object stably with balanced force at an even and low speed. Put down the object stably and slowly to prevent any collision or drop from scratching the surface of the equipment or damaging the components and cables. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 19 Personnel involving working at heights are not allowed to throw objects from the height to the ground, or vice versa. Objects should be transported by slings, hanging baskets, highline trolleys, or cranes. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 20 If a single ladder is used, the recommended angle for the ladder against the floor is 75 degrees, as shown in the following figure. A square can be used to measure the angle. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 21 Do not drag steel ropes and hoisting tools or bump hoisted objects against hard objects during hoisting. ● Ensure that the angle between two hoisting ropes is no more than 90 degrees, as shown in the following figure. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 23: Cooling System Safety
This also promotes resource sustainability. To recycle an old device, use a recycling collection system or contact the supplier. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 24: Product Description
NetCol: data center smart cooling product cooling product Series 8000: in-room smart cooling product Cooling mode A: air cooled Model code 013: model code 013 Airflow mode U: Upflow Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 25 6: 220–240 V, 1 Ph, 50/60 Hz Climate type C: Common non-corrosive environment Fan type 3: DC fan Packaging type E: Package for international markets Special identifier for 0: None orders Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 26: Composition
The indoor unit and outdoor condenser are connected and circulate using refrigerant in a sealing manner. Figure 2-3 Components 2.2.2 Main Components Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 27: Indoor Unit
NetCol8000-A013 In-room Air Cooled Smart Cooling Product User Manual (600 mm Width) 2 Product Description 2.2.2.1 Indoor Unit Appearance and Dimensions Figure 2-4 Appearance and dimensions (unit: mm) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 29: Outdoor Unit
The valve is used to connect pipes between indoor and outdoor units without welding, featuring high reliability and easy installation and maintenance. 2.2.2.2 Outdoor Unit Appearance and Dimensions Figure 2-6 Appearance and dimensions (unit: mm) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 30: Controller
It can adjust the preset parameters and running parameters based on the actual conditions to ensure that the smart cooling product operates according to site requirements. The following shows the controller. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 31: Monitoring System
2.2.2.4 Monitoring System The monitoring system provides logic control, control demand delivering, alarm reporting, data storage, user right management, and teamwork control functions. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 32: Physical Ports
Outer diameter: 3/8 inch (9.52 mm); unit pipe sealing stop valve for the end face Refrigerant gas pipe Outer diameter: 3/4 inch (19.05 mm); sealing stop valve for the end face Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 33: Operating Environment Specifications
Altitu 1000 1500 2000 2500 3000 3500 4000 0.887 0.835 0.785 0.737 0.692 0.649 0.608 volum coeffic ient Coolin 0.940 0.909 0.878 0.846 0.815 0.784 0.753 capaci coeffic ient Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 34 (RCCB) that is insensitive to single-phase DC pulsation and transient impulse current. Note: If the requirements are not met, contact technical support for an optimized solution. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 35: Technical Specifications
Bottom, left, and right cabling IP rating IP20 Dimensions (H 2000 mm x 600 mm x 600 mm x W x D) Heating function Humidification function Reheating 4 kW capacity Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 36 Outdoor unit installation environments are classified as follows based on the harshness: ● Class A (controlled environment): indoor environments where temperature and humidity are controlled, including rooms where people live. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 37 3.7 km of the sea or within 1.2 km of a pollution source ● Class D (marine environment): environments within 500 m of the coast Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 38: System Installation
Step ladder (2 Adjustable Phillips screwdriver Flat-head Torque wrench wrench (6") (M4 and M6) screwdriver (2-5 Right angle Socket wrench (M6, Hex key (5 mm) Pipe bender M8, and M12) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 39 Crimping tool Hammer drill Pallet truck Table 3-2 Special tools Name, Specifications, and Appearance Antifreeze gloves Electric balance Welding torch 5% silver solder Oxygen Acetylene Hot melt device Clamp meter Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 40: Materials
● Maximum gap: 0.5 mm ● Pressure resistance: above 1.6 MPa Technical Specification ● Compliant with the industry standard JB∕T7311-2008 for the Application of Anaerobic Glue in Engineering Machinery . 3.2 Materials Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 41: Refrigerant R410A
Pressure – Pressure Pressure Gauge (MPa) (MPa) Pressure (MPa) 1.31 2.21 0.73 1.35 2.27 0.75 1.39 2.33 0.78 1.43 2.39 0.81 1.47 2.45 0.84 1.51 2.51 0.87 1.56 2.57 Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 42: Refrigerant Oil Rb75Ea
Add refrigerant oil based on the actual situation only when the refrigerant oil leaks and the compressor does not need to be replaced. 3.2.3 Pipes Oil Trap Figure 3-2 shows the oil trap specifications. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 43 3/4 inch (19.05 mm), wall thickness: 1.0 mm; pressure withstanding capacity ≥ 4.5 MPa Thermal insulation ≥ 13 mm foam Water Pipe Figure 3-3 shows how to connect a drainpipe. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 44 The object shown in the dotted line box is the reserved port of the smart cooling product. The hose clamp is configured in standard configuration. Other parts are not configured and need to be purchased onsite. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 45: Pipe Support
When connecting cables, fit them with protective hoses. Table 3-5 Cable specifications Application Specifications Remarks Scenario Equipotential The length is 6 mm outdoor copper cable ground cable determined based on site survey. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 46: Space Requirements
(The incoming outdoor air should be less than 5% of the entire indoor airflow. All doors and windows should be closed and the gap should be minimal.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 47 To facilitate the normal maintenance of the indoor unit, do not install other devices above the indoor unit. Figure 3-6 Space requirements (side pipe routing) Figure 3-7 Space requirements (bottom pipe routing) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 48: Outdoor Unit Space Requirements
Figure 3-9. Figure 3-9 Space requirements for installing an air baffle ● Installing an outdoor unit on a wall, as shown in Figure 3-10. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 49: Layout Principles
5–6 meters in the vertical direction along the gas pipe. ● If the indoor unit is placed higher than the outdoor unit, the maximum height deviation between them should be less than or equal to 5 meters. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 50 1:200. The pipe tilting direction should be consistent with the hypotenuse of the right triangle. Figure 3-12 Layout of sideward piping (1) Oil trap (2) Tilted gas pipe (3) Tilted liquid pipe Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 51: Holes Introduction
(1) Power cable hole (2) Signal cable hole (3) Humidifier water inlet pipe hole (4) Drainpipe hole (5) Gas pipe hole (6) Liquid pipe hole Figure 3-14 Holes dimensions (unit: mm) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 52: Checking The Nitrogen Pressure
If they exist, remove each valve bonnet and press the valve plugs in turn. If gas flows out, the system is normal. If no gas flows out, contact technical support. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 53: Securing An Indoor Unit
Figure 3-17 Mounting hole sizes Step 3 Move the smart cooling product to the installation position. Step 4 Secure the indoor unit to the base or floor using a torque wrench. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 54: Securing An Outdoor Unit
3.8.1 Securing an Outdoor Unit (on a Concrete Groundwork) Prerequisites ● The M10 expansion bolts used for securing an outdoor unit have been prepared. ● A concrete groundwork has been prepared. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 55: Securing An Outdoor Unit (On A Wall)
3-19. Figure 3-19 Installing an outdoor unit ----End 3.8.2 Securing an Outdoor Unit (on a Wall) Prerequisites The M10 bolts used for securing an outdoor unit have been prepared. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 56: Securing An Outdoor Unit (On A Base)
Step 3 Secure the outdoor unit to the bracket using four M10 screws. Figure 3-20 Installing an outdoor unit ----End 3.8.3 Securing an Outdoor Unit (on a Base) Prerequisites The M10 bolts used for securing an outdoor unit have been prepared. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 57: Connecting Refrigerant Pipes
Step 3 Secure the outdoor unit to the base using four M10 screws. Figure 3-21 Installing an outdoor unit ----End 3.9 Connecting Refrigerant Pipes Context Tools: adjustable wrench (250 mm x 30 mm), hex key (5 mm), torque wrench (17#/19#/27#/30#/36#) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 58 When the direction of the refrigerant pipe is changed, add a support at the position that is 500 mm away from the changing point. ● If the refrigerant pipe is straight, add a support every 1500 mm. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 59 – When tightening a stop valve using a torque wrench, secure the hex nut of the active connector at the welded copper pipe to prevent the copper pipe from turning and further deforming as the stop valve is being tightened. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 60 70 N·m and that for the pipe nut of the gas pipe stop valve is 100 N·m. The torque greater than the failure torque will damage the screw thread. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 61 (available among the fittings) outside the cabinet. Open the stop valve nut and tighten the nut of the welded pipe assembly to the stop valve. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 62: Connecting Water Pipes
Connect the external water inlet pipe to the rigid pipe conversion adapter. Figure 3-28 Connecting the water inlet pipe Step 3 Secure water pipes using cable ties, and seal the pipe hole using firestop putty. ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 63: Connecting The Condensate Drainpipe
Step 2 Route the external drainpipe into the cabinet through the side plate or bottom plate. Connect the external drainpipe to the rigid pipe conversion adapter. Figure 3-29 Bottom pipe routing Figure 3-30 Side pipe routing Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 64: Connecting Cables
● Before connecting cables, use a voltmeter to measure the input voltage and ensure that the power supply is off. The following cables are to be connected onsite: Power cable for the indoor unit Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 65: Connecting The Indoor Unit Power Cable
Figure 3-32 Connecting the indoor unit power cable 3.11.3 (Optional) Connecting the Indoor Unit Signal Cables Figure 3-33 Signal terminals Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 66: Connecting The Outdoor Unit Power Cable And The Signal Cable Between Indoor And Outdoor Units
The signal cable between the indoor and outdoor units should be a shielded cable, and the shield layer should be reliably grounded. Figure 3-34 Connecting the outdoor unit power cable and the signal cable between indoor and outdoor units Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 67: Optional) Connect Teamwork And Monitoring Cables
The network cables must be shielded cables, and the shield layer must be reliably grounded. Connecting Teamwork Cables NetCol8000-A013 supports teamwork networking (hand-in-hand). In networking, a maximum of 32 smart cooling products can be teamworked. After power-on, choose Setting > User Menu > Teamwork Setting, and set Enable Teamwork Resistor for the controllers of the first and last smart cooling products to Yes.
Page 68: Cable Routes
Figure 3-36 Connecting RS485 monitoring cables 3.11.6 Cable Routes The following figure shows how to route the power cables and the signal cable between the indoor and outdoor units from the bottom. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 69: Leakage Test With Nitrogen
Step 1 Open the stop valves for the gas pipe and liquid pipe of the indoor unit. NO TICE Before opening the indoor unit stop valves, ensure that the stop valves for the gas pipe and liquid pipe of the outdoor unit are closed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 70: Vacuumization
Check that the hose clamps and cable ties of the drainpipe are secured. Water pipe joints have been sealed by sealant. ● Check that all nitrogen has been exhausted from the indoor unit. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 71 Step 5 After vacuumization, close all valves of the pressure gauge and the vacuum pump without disconnecting it. Preserve the pressure for 10 minutes, and verify that the absolute pressure of the cooling system is not greater than 90 Pa. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 72 (2) Liquid pipe stop (3) Gas pipe stop valve (4) Cable ties valve Step 10 Wrap the gas liquid stop valve with stop valve sponge by referring to Step ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 73: Verifying The Installation
The fan blades do not interfere. Cables □ Passed. □ Failed are protected by tubes and the cable outlet faces downward. The protective cardboard of condenser fin has been removed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 74: Power-On Commissioning
● If an alarm needs to be cleared manually, press and hold this key for 3 seconds to generate a prompt tone, prompting that it has been eliminated. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 76: Power-On
● For system security purposes, change the preset password after first login. ● The preset passwords for the setting and maintenance menus are as follows. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 77 Step 2 Open the front door of the indoor unit and turn on the indoor unit switch. The smart cooling product LCD lights up automatically. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 78 Data Center Facility Deployment Guide . Step 5 Enter the startup password generated by the app in the displayed dialog box to start the smart cooling product. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 79 0% is displayed. Dehumidifi If the equipment enters the dehumidification cation mode, 100% is displayed. If the equipment exits status from the dehumidification mode, 0% is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 80: Setting Temperature And Humidity Values
, and choose Setting > User Menu by pressing the key to access the screen for entering the password for the user menu. Figure 4-5 Screen for entering the password for the user menu Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 81: Optional) Setting Teamwork Parameters
Step 1 Determine the positions of the master unit and slave unit based on the site situation. Step 2 Choose Teamwork Setting from the user menu, and tap to access the teamwork setting screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 82 If the function is disabled, a unit operates independently. If the function is enabled, a unit operates in a team with other units. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 83 2 ranging from 1 to consecutively to all the number of units running units in a in a group. group. Remaining units will be regarded as standby units. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 84 Low Temp Start All, all the smart cooling products in a group will start heating simultaneously. Temp for You are advised not 13°C LT Start to change the value. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 85: Optional) Setting Monitor Parameters
Enable Monitoring In an NMS, the values Resistor for the first and last smart cooling products by cable routing are "Yes". ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 86: Commissioning Procedure
Step 6 Commission the compressor by setting the compressor rotational speed to 3000 rpm. According to the one-way pipe length, determine whether it is need to fill the refrigerant. If you need to fill refrigerant, fill refrigerant through the needle Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 87 On the diagnostic mode screen, change the compressor input to 0 rpm. Step 7 Commission the humidifier. Confirm that the upstream inlet valve of the wet film humidifier is open. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 88: Checking After Commissioning
(torque of 0.45±0.05 N·m), and the valve bonnet is tightened. The foreign matter inside the water □Passed □Failed pan and bottom plate is cleaned up. The air filter is correctly installed. □Passed □Failed Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 89: System Operation And Maintenance
If you need to perform maintenance tasks such as measuring the current, voltage, and temperature when the unit is operating, connect the power supply only after you have Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 90: Preventive Maintenance Tables
Check for leakage and repair the tightened and free of water leakage. pipe, or reconnect the pipe. Check that the thermal insulation Wrap the thermal insulation foam foam is intact. again. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 91 Use a brush or indoor unit are free of dust. compressed dry air to remove dust from electrical components, and control components. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 92: Troubleshooting
The indoor fan is damaged. Replace the indoor fan. indoor The drive board of the Replace the drive board of the indoor fan. unit unit fails indoor fan is damaged. to start. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 94 Apply soapy water or use a halogen leak low. detector to check for any leakage. If leaking points are found, retrieve the refrigerant and weld the leaking points again. Contact the technical support. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 95 EEV is within the normal range (4–10°C). Refrigerant oil is Add refrigerant oil. generates insufficient. too much operating noise. (It common that the compress generates much noise when it shuts down.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 96: Alarm Reference
2. Check the plug of indoor fan module the indoor fan board is loose. module board. 3. The indoor fan 3. Replace the indoor module board is fan module board. faulty. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 97 HP Lock Alarm compressor HP Alarm is triggered the Comp Discharge shuts down. multiple times within a HP Alarm. (The alarm specified period of needs to be time. manually cleared.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 98 Refer to the solution to Lock Alarm compressor Alarm is triggered the Comp Suction LP shuts down. multiple times within a Alarm. (The alarm specified period of needs to be time. manually cleared.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 99 Refer to the solution to Lock Alarm compressor Alarm is triggered the Comp HP Switch shuts down. multiple times within a Alarm. (The alarm specified period of needs to be time. manually cleared.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 100 Refer to the solution to Lock Alarm compressor Alarm is triggered the Comp LP Switch shuts down. multiple times within a Alarm. (The alarm specified period of needs to be time. manually cleared.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 101 HT Lock Alarm compressor HT Alarm is triggered the Comp Discharge shuts down. multiple times within a HT Alarm. (The alarm specified period of needs to be time. manually cleared.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 102 2. Refill refrigerant. speed and the actual 3. Replace the compressor rotational compressor drive speed is greater than board or the control threshold. compressor. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 103 2. Use an oscilloscope to check whether the waveform of the power grid is within the normal range. 3. Replace the compressor drive board if it is faulty. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 104 2. Check the connection status of the compressor and the drive board. 3. Check the status of the compressor drive board. 4. Replace the compressor drive board or compressor. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 105 Comp Preheating The compressor Wait until the unit is Alarm compressor preheating function is preheated completely. shuts down. started and the preheating is not complete. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 106 2. If there is a replacement of main control board of the outdoor unit, you need to replace the E square of compressor drive. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 107 EEV Drive Lock The EEV Drive Alarm is Refer to the solution to Alarm compressor triggered multiple the EEV Drive Alarm. shuts down. times within a specified period of time. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 108 OutFan1 Run The runtime of Replace outdoor fan 1 Timeout Alarm outdoor fan 1 exceeds and clear the the preset threshold. cumulative runtime. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 109 1. Check the cable Sensor Fault compressor cable is not properly connection to the shuts down. connected. pressure sensor. 2. The pressure sensor 2. Maintain or replace is faulty. the pressure sensor. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 110 (705 and 706 2. The temperature 2. Maintain or replace are triggered sensor is faulty. the temperature at the same sensor. time.) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 111 OutUnit EEPROM failure is Replace the main Mainboard Fault detected on the main control board of the control board of the outdoor unit. outdoor unit. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 112 2. Increase the power 2. The power supply supply voltage of voltage of the the outdoor unit. outdoor unit is too low. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 113 2. Check and re-detect connection fails. the teamwork connection. 3. The number of units is incorrectly set for 3. Check the number the teamwork of units and set it master unit. correctly. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 114 1. Check the cable Temp sensor fault sensor cable is not connection to the properly connected. temperature sensor. 2. The temperature 2. Maintain or replace sensor is faulty. the temperature sensor. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 115 4. Calibrate or replace inappropriate for the temperature the working sensor. conditions. 4. The temperature displayed by the temperature sensor is different from the actual temperature. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 117: Parts Replacement
A spare air filter of the same model is available and functional. Procedure Step 1 Open the front door. Step 2 Loosen the two screws on the air filter by hand, and remove the air filter. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 118: Optional) Replacing An Electric Heater
Step 4 Use diagonal pliers to cut off the cable tie that secures the electric heater cables, and remove the signal cable terminal on the left of the electric heater. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 119: Optional) Replacing A Wet Film Humidifier
Prerequisites ● A wet film humidifier needs to be replaced. ● A spare wet film humidifier of the same model is available and functional. Context ● Tool: Phillips screwdriver Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 120 Step 8 Tap on the home screen, and tap Yes on the start confirmation screen. Ensure that the smart cooling product is running properly without any alarms. ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 122: Replacing A Main Control Board
● A spare main control board of the same model is available and functional. Context Tool: Phillips screwdriver The following figure shows the position of the main control board. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 123 Maintenance > Select Model, and enable the corresponding option based on the unit configuration. ● If only the liquid solenoid valve is configured, enable Cooling Only (LV). ● If only the heating and humidification functions are configured, enable Heat&Humidify. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 124: Replacing The Drive Board Of The Indoor Fan
Step 2 Use a Phillips screwdriver to remove the nine screws that secure the baffle plate of the electric control box, and remove the baffle plate from the electric control box. Step 3 Remove the cable terminals from the fan drive board. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 125: Replacing An Lcd
Step 7 Choose Maintenance > USB Wizard > Configuration Import to import historical data. Step 8 After the cables are reconnected, the home screen is displayed on the LCD. Check whether the display is normal. ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 126: Replacing An Eev
Step 6 Weld the two ends of the EEV using a welding torch, as shown in Figure 5-8. Then, remove the EEV. Figure 5-8 Removing the EEV Step 7 Weld a new EEV, and install the coil for the EEV. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 127: Replacing Outdoor Unit Components
5.4.2 Replacing Outdoor Unit Components 5.4.2.1 Replacing an Outdoor Fan Prerequisites ● An outdoor fan needs to be replaced. ● A spare outdoor fan of the same model is available and functional. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 128 Figure 5-9 Removing the fan guard Step 3 Remove the screws from the fan using a wrench, and remove the outdoor fan blades. Figure 5-10 Removing the outdoor fan blades Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 129: Replacing A Control Board
If the outdoor unit does not take the electricity from indoor unit, turn off the circuit breaker for the outdoor unit. Step 2 Remove the top cover and front upper panel using a Phillips screwdriver. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 130 Pull out the control board upwards. Figure 5-12 Removing the control board (1) Liquid cooling cold plate Step 6 Install a new control board, and tighten the bolts to secure it. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 131: Replacing A Low Pressure Sensor
Step 3 Remove the top cover and front upper panel using a Phillips screwdriver. For panels position, see Figure 5-11. Step 4 Open the cable connection box cover of the outdoor unit, remove the following four cables, and remove the side rear panel. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 132 Run > Device Run State to view the Suction Pressure, Discharge Pressure, and EEV Suct Superheat, and Supercool. Check whether the suction pressure, discharge pressure, EEV suction superheat degree, and supercool degree are within the reasonable range. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 133 2. The air inlet and outlet of outdoor unit are without block. (The air inlet and outlet blockage would result in high discharge pressure.) On the diagnostic mode screen, change the compressor input to 0 rpm. Exit the diagnostic mode. ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 134: Faq
Step 2 Move the cursor to Run by pressing the key. Step 3 Press the key to access the run submenu screen. Step 4 Move the cursor to Temp&Humid Param by pressing the key. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 135: How Do I Check Device Running State
----End 6.2 How Do I Check Device Running State? Procedure Step 1 On the home screen, press the key to access the menu screen. Figure 6-4 Menu screen Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 136: How Do I Check Teamwork State
Step 6 Query all contents under this submenu by pressing the keys. ----End 6.3 How Do I Check Teamwork State? Procedure Step 1 On the home screen, press the key to access the menu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 137 Step 4 Move the cursor to Teamwork State by pressing the key. Figure 6-8 Moving the cursor Step 5 Press the key to access the teamwork state submenu screen. Figure 6-9 Teamwork state submenu Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 138: How Do I Query Device Runtime
Figure 6-10 Menu screen Step 2 Move the cursor to Run by pressing the key. Step 3 Press the key to access the run submenu screen. Figure 6-11 Run submenu Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 139: How Do I Query Alarms
Press the key to access the menu screen. On the menu screen, move the cursor to Alarm by pressing the key. Press the key to access the alarm submenu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 140 Step 1 Move the cursor to Query Active Alarm by pressing the key. Then press the key to access the active alarm query submenu screen. Figure 6-14 Querying active alarms Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 141 Step 1 Move the cursor to Query Historical Alarm by pressing the key. Then press the key to access the historical alarm query submenu screen. Figure 6-15 Querying historical alarms Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 142: How Do I Perform User Settings
Step 3 On the setting submenu screen, move the cursor to User Menu by pressing the key. Then press the key to access the screen for entering the password for the user menu. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 143 Figure 6-20 Correct password Step 5 On the user menu screen, move the cursor to User Setting by pressing the key. Then press the key to access the user setting submenu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 144: How Do I Reset A User Password
Figure 6-22 Menu screen Step 2 Move the cursor to Setting by pressing the key. Then press the key to access the setting submenu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 145 If the password is incorrect, the message "Wrong Password. Enter Again" is displayed. Figure 6-25 Incorrect password ● If the password is correct, the user menu screen is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 146 Figure 6-27 Entering a password Step 6 Set the user new password by pressing the , and keys. Figure 6-28 Password setting Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 147: How Do I Set Alarm Parameters
Figure 6-30 Menu screen Step 2 Move the cursor to Setting by pressing the key. Then press the key to access the setting submenu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 148 Then press the key. Figure 6-32 Entering a password ● If the password is incorrect, the message "Wrong Password. Enter Again" is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 149 Step 5 On the administrator menu screen, move the cursor to Alarm Setting by pressing key. Then press the key to access the alarm setting submenu screen. Figure 6-35 Accessing the alarm setting submenu Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 150 , and keys. Figure 6-36 Temperature and humidity sensor ● Access the Compressor submenu screen, and set parameters for the compressor by pressing the , and keys. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 151: How Do I Restore Default Settings
Figure 6-38 Deleting historical alarms ----End 6.9 How Do I Restore Default Settings? Procedure Step 1 Press the key to access the menu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 152 Step 4 On the screen for entering the password for the administrator menu, enter the password digits by using the keys, and adjust the position of the digit to be entered by using the keys. Then press the key. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 153 Step 5 On the administrator menu screen, move the cursor to Restore Default Setting by pressing the key. Then press the key to access the screen for entering the password. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 154: How Do I Set A New Administrator Password
Figure 6-45 Restoring default settings ----End 6.10 How Do I Set a New Administrator Password? Procedure Step 1 Press the key to access the menu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 155 Step 4 On the screen for entering the password for the administrator menu, enter the password digits by using the keys, and adjust the position of the digit to be entered by using the keys. Then press the key. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 156 Figure 6-50 Correct password Step 5 On the administrator menu screen, move the cursor to Password Setting by pressing the key. Then press the key to access the password setting screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 157 The level of the administrator password is higher than that of the user password. The administrator password can be used to log in to the user menu, but the user password cannot be used to log in to the administrator menu. ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 158: How Do I Clear Total Runtime Of A Device
Then press the key. Figure 6-55 Entering a password ● If the password is incorrect, the message "Wrong Password. Enter Again" is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 159 Step 4 On the maintenance menu screen, move the cursor to Performance Maintain by pressing the , or key. Then press the key to access the performance maintenance submenu screen. Figure 6-58 Performance maintenance Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 160: How Do I Calibrate A Sensor
Step 3 On the screen for entering the password for the maintenance menu, enter the password digits by using the keys, and adjust the position of the digit to be entered by using the keys. Then press the key. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 161 Step 4 On the maintenance menu screen, move the cursor to Sensor Calibration by pressing the , or key. Then press the key to access the sensor calibration submenu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 162: How Do I Upgrade Versions
The upgrade file must be stored in the root directory of the USB flash drive. Procedure Step 1 Press the key to access the menu screen. Figure 6-64 Menu screen Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 163 If the password is incorrect, the message "Wrong Password. Enter Again" is displayed. Figure 6-66 Incorrect password ● If the password is correct, the maintenance menu screen is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 164 Figure 6-68 USB wizard Step 5 On the USB wizard menu, move the cursor to Version Upgrade by pressing the key. Then press the key to access the version upgrade screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 165 If the outdoor unit upgrade program exists in the USB flash drive, the system starts upgrading the outdoor unit program and the upgrade progress bar is displayed. After the upgrade is complete, **Upgrade Done** is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 166: How Do I Import And Export Data
Step 3 On the screen for entering the password for the maintenance menu, enter the password digits by using the keys, and adjust the position of the digit to be entered by using the keys. Then press the key. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 167 Step 4 On the maintenance menu, move the cursor to USB Wizard by pressing the , or key. Then press the key to access the USB wizard submenu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 168 **U Disk No Detect** is displayed 15 seconds after you press the key. If the USB flash drive inserted does not contain the configuration file (ACC_Config.csv), **No File Found** is displayed. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 169: How Do I Set A New Maintenance Password
Step 3 On the screen for entering the password for the maintenance menu, enter the password digits by using the keys, and adjust the position of the digit to be entered by using the keys. Then press the key. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 170 Figure 6-80 Correct password Step 4 On the maintenance menu, move the cursor to Password Setting by pressing the key. Then press the key to access the password setting screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 171: How Do I View The Current Versions
The administrator password and maintenance password are at the same level. ----End 6.16 How Do I View the Current Versions? Procedure Step 1 Press the key to access the menu screen. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 172 Then you can view the e-label of the current model as well as the current version of the display panel, indoor unit, and outdoor unit. Figure 6-85 About ----End Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 173: A Cooling System Layout
(16) Indoor unit gas pipe stop (17) Outdoor unit gas pipe (18) Suction temperature valve stop valve sensor (19) Low pressure sensor (20) Gas-liquid separator (21) Low pressure switch Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 174: B Base Drawings
User Manual (600 mm Width) B Base Drawings Base Drawings Figure B-1 Base drawings of an indoor unit (unit: mm) Figure B-2 Base drawings of an outdoor unit (unit: mm) Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 175 3. Install shock pads between the base and the unit. The shock pads should be made of EPDM rubber and 5 mm thick. 4. Control welding errors during the manufacturing process. If welding errors are large, the base will be unusable after welding. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 176: C Bracket Drawings
● It is recommended that no more than two maintenance engineers (75 kg/person) stand on the mounting bracket. ● The maintenance engineers must fasten the safety belt during the maintenance. The fence cannot be used as a support. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 177 User Manual (600 mm Width) C Bracket Drawings Figure C-2 Wall-mounting bracket drawing 2 (unit: mm) NO TE Select the 50 mm x 50 mm x 5 mm stainless angle steel. Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 178: D Electrical Diagrams
NetCol8000-A013 In-room Air Cooled Smart Cooling Product User Manual (600 mm Width) D Electrical Diagrams Electrical Diagrams Figure D-1 Indoor unit electrical diagram Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 179 NetCol8000-A013 In-room Air Cooled Smart Cooling Product User Manual (600 mm Width) D Electrical Diagrams Figure D-2 Outdoor unit electrical diagram Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 180: E Acronyms And Abbreviations
User Manual (600 mm Width) E Acronyms and Abbreviations Acronyms and Abbreviations alternating current board support package computational fluid dynamics controller area network direct current electronic commutation network management system Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 181 Ethernet Internet Protocol liquid crystal display local user interface negative temperature coefficient personal computer positive temperature coefficient power usage effectiveness RCCB residual current circuit breaker thin film transistor Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.
Page 182 NetCol8000-A013 In-room Air Cooled Smart Cooling Product User Manual (600 mm Width) E Acronyms and Abbreviations Universal Serial Bus Issue 04 (2022-11-25) Copyright © Huawei Digital Power Technologies Co., Ltd.

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