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NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
User Manual

5 System Operation and Maintenance

Issue 01 (2014-06-30)

Huawei Proprietary and Confidential

Alarm
ID

Alarm
Name

Alarm
Severity

Impact

Possible Causes

Solution

compressor
shuts down
forcibly.

is faulty.

The solenoid valve is
faulty.

The filter dryer is
blocked.

The expansion valve is
blocked.

The refrigerant leaks.

switch.

Maintain or replace
the solenoid coil or
solenoid valve.

Maintain or replace
the filter dryer.

Maintain or replace
the expansion valve.

Check and rectify any
leakages. Charge
refrigerant after
maintenance or
replacement.

a011

Comp suction
LP lock

Critical

The alarm
is
generated,
and the
compressor
is locked
and not
allowed to
be started.

The Comp suction LP alarm
is triggered for the
compressor multiple times
within a period.

Clear this alarm using the
solutions for alarm a010.

NOTE

After the alarm is cleared,
click

Manual clear

on the

alarm page.

a012

Comp dis HT

Major

The alarm
is
generated,
and the
compressor
shuts down
forcibly.

Cables to the high
temperature switch are
loose or damaged.

The high temperature
switch is faulty.

Outdoor fans are faulty.

The condenser is
blocked.

The refrigerant leaks.

The refrigeration
capacity of the
NetCol5000-A020 is
insufficient or the heat
load is high.

Check cables to the
high temperature
switch.

Maintain or replace
the temperature
switch.

Maintain or replace
the outdoor fans.

Clean the condenser.

Check and rectify any
leakages. Charge
refrigerant after
maintenance or
replacement.

Add more
NetCol5000-A020
units.

a013

Comp dis HT
lock

Critical

The alarm
is
generated,
and the
compressor
shuts down
forcibly.

The Comp dig HT alarm is
triggered for the compressor
multiple times within a
period.

Clear this alarm using the
solutions for alarm a012.

NOTE

After the alarm is cleared,
click

Manual clear

on the

alarm page.

a014

Comp short
period

Warning

The alarm
is

The shortest running
period and shortest

Adjust the shortest
running period and

Summary of Contents for NetCol5000-A020

Page 1: ...Part Number 31010QPN NetCol5000 A020 Air Cooled In row Precision Air Conditioner V100R002 User Manual Issue 01 Date 2014 06 30 HUAWEI TECHNOLOGIES CO LTD ...

Page 2: ...e 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 without warranties guarantees or representations of any kind either express or implied The information in this document is subject...

Page 3: ...cument is intended for Sales personnel Technical support personnel System engineers Hardware installation personnel Commissioning engineers Data configuration engineers Maintenance personnel Symbol Conventions The symbols that may be found in this document are defined in the following table Symbol After the system is restarted use the kmtune command to check the kernel parameters to ensure that th...

Page 4: ...n which if not avoided could result in equipment damage data loss performance deterioration or unanticipated results NOTICE is used to address practices not related to personal injury Calls attention to important information best practices and tips NOTE is used to address information not related to personal injury equipment damage and environment deterioration Change History Changes between docume...

Page 5: ...ng function 9 2 3 1 Controller 9 2 3 2 Monitoring System 10 2 4 Application Environment 11 2 5 Technical Specifications 13 3 Installation Guide 15 3 1 Installation Preparations 15 3 1 1 Preparing Tools 15 3 1 2 Material Preparations 17 3 1 3 Installation Precautions 24 3 1 4 Installation Layout 26 3 2 Transportation and Unpacking 28 3 3 Installation Flowchart 30 3 4 Mechanical Installation 31 3 5 ...

Page 6: ...2 4 Partially Charging in Refrigerant 64 4 3 Power on Preparations 65 4 4 Powering on the Equipment 67 4 5 Commissioning Procedure 68 4 6 Powering off the Equipment 71 5 System Operation and Maintenance 72 5 1 Safety Precautions 72 5 2 Indoor Unit Maintenance Items 72 5 3 Other Cooling System Components 76 5 4 Alarm Reference 78 5 5 Troubleshooting 90 5 5 1 The NetCol5000 A020 Generates Abnormal V...

Page 7: ...e 114 5 6 7 Replacing Components in the Electric Control Box 114 5 6 8 Replacing the Return Air and Supply Air Temperature Sensor 116 5 6 9 Replacing an T H Sensor 118 5 6 10 Replacing the Power Module 119 5 6 11 Replacing the Float 121 5 6 12 Replacing the LCD 122 A Acronyms and Abbreviations 124 B Laying out the Cooling System 125 C Electrical Ports 126 D Electrical Schematic Diagram 128 E Schem...

Page 8: ...fety of humans and the equipment pay attention to the safety symbols on the equipment and all the safety instructions in this document The NOTICE CAUTION WARNING and DANGER marks in this document do not represent all the safety instructions They are only supplements to the safety instructions Local Safety Regulations When operating Huawei equipment you must follow the local laws and regulations Th...

Page 9: ... of the device to ensure that it is securely grounded Human Safety This appliance not accessible to the general public Before operating a device wear electrostatic discharge ESD clothes ESD gloves and an ESD wrist strap Remove conductive objects such as jewelry and watches to avoid electric shocks or burns Ensure that tools are insulated In the case of fire immediately leave the building or the eq...

Page 10: ...s with insulation tapes and properly place them Power Cable Do not install or remove power cables when the device is on Transient contact between the core of the power cable and the conductor may generate electric arcs or sparks which may cause fire or hurt human eyes Before installing or removing the power cable turn off the power switch Before connecting a power cable verify that the label on th...

Page 11: ...lling holes Before drilling holes wear protective gloves After drilling clean up the metal shavings Sharp Objects Before you hold or carry a device wear protective gloves to avoid getting injured by sharp edges of the device Handling Fans When replacing a component place the component screws and tools in a safe place Otherwise if any of them fall into the operating fans the fans may be damaged Whe...

Page 12: ...or the ground Do not put welding torch with residual acetylene and oxygen inside a metal container to avoid gas leakage and burning Get the high temperature pipe cooled down after welding Do not perform welding and cutting on a container under pressure Power off the device before any welding operation 1 4 Running Safety High Temperature and High Pressure Misoperations may cause over high pressure ...

Page 13: ... with caution especially at a low temperature Do not drop the power cables directly from the vehicle Storage Ensure that devices are not exposed to direct sunlight or near heat sources Keep devices especially those with high pressure nitrogen or refrigerant away from fire or heat sources to avoid exploration or leakage Correct Disposal of This Product This marking indicates that this product shoul...

Page 14: ...iption 2 1 Model Description Figure 2 1 shows the naming rule for the NetCol5000 A series products Figure 2 1 Naming rule for the NetCol5000 A 2 2 Composition of an Indoor Unit Structure The NetCol5000 A020 is in dimensions H x W x D of 2000 mm x 300 mm x 1000 mm in standard configurations and 2000 mm x 300 mm x 1200 mm for expansion by adding frames Figure 2 2 shows the dimensions of a NetCol5000...

Page 15: ...sy installation The R410A refrigerant is environmentally friendly EC fan The brand fans are used featuring less power consumption high efficiency high power coefficient optimal speed adjustment and simple control Compared with common fans such fans are highly reliable with redundancy design and save 30 more energy Evaporator The highly efficient finned pipe evaporator with threaded copper pipes an...

Page 16: ...and shutdown of the compressor Surge protection and filtering board The surge protection and filtering board is used for surge protection and equipment voltage detection enhancing equipment security Electric heater The PTC heater implements quick startup large heating capacity even heat dissipation and automatic heat capacity adjustment providing multiple protection mechanisms Electrode humidifier...

Page 17: ...eliability Features The controller provides a touchscreen with a user friendly interface The controller controls the air conditioner precisely and responds quickly The multi level password protection prevents misoperations The controller protects the air conditioner against overvoltage undervoltage abnormal power failure and water leaks which ensures air conditioner reliability The LCD on the cont...

Page 18: ...rk diagram Figure 2 4 shows the monitoring network diagram Figure 2 4 Networking diagram 2 4 Application Environment Table 2 1 lists the environmental specifications Table 2 2 lists the physical ports Table 2 3 lists the installation requirements Table 2 2 lists the water quality requirements Table 2 1 Environmental specifications Item Specifications Operating temperature 18 45 C Operating humidit...

Page 19: ...ments Item Specifications Door Width not smaller than 0 9 m height not smaller than 2 3 m Floor Bearing capacity not smaller than 350 kg m2 for raised floors height not smaller than 250 mm Length of one way refrigerant pipes 25 m Height difference between the indoor and outdoor units If the outdoor unit is placed higher than the indoor unit the maximum vertical distance between them is 10 m If the...

Page 20: ...20 C σ20 300 1250 μS cm Total dissolved solids 0 93 x σ20 mg l Dry residue at180 C 0 65 x σ20 mg l Total hardness 100 400 mg l CaCO3 Temporary hardness 60 300 mg l CaCO3 Iron manganese 0 0 2 mg l Fe Mn Chloridum 0 30 ppm Cl Anhydrous silicate 0 20 mg l SiO2 Residual chlorinum 0 0 2 mg l Cl Calcium sulfate 0 100 mg l CaSO4 Metal matter 0 mg l Solvent thinner soap and lubricant 0 mg l Visible impuri...

Page 21: ...this case contact Huawei technical support Table 2 6 Optional parameters Item Specifications NetCol5000 A 020 HM13N10020 E0 NetCol5000 A 020 HM13N1E120 E0 NetCol5000 A 020 HQ13N10020 E0 NetCol5000 A 020 HQ13N1E120 E0 Maximum current 16 5 A 23 A 16 5 A 23 A Input power 380 415 V AC 50 Hz 3W N PE 380 415 V AC 50 Hz 3W N PE 380 V AC 60 Hz 3W N PE 380 V AC 60 Hz 3W N PE Voltage tolerancea Rated voltag...

Page 22: ...ll the NetCol5000 A020 correctly as required 3 1 1 Preparing Tools Table 3 1 to Table 3 5 list the tools for installing the NetCol5000 A020 Add or delete tools as required Table 3 1 General tools Appearance Specifications and Name Adjustable wrench 12 19 Phillips screwdriver M4 M6 and M8 Flat head screwdriver M3 M4 Socket wrench 18 mm Torque wrench 28 mm Fixed wrench 12 13 18 Hex key 6 mm Right an...

Page 23: ...ications and Name Cutter Waterproof sealanta Welding torch Copper phosphorus brazing rod Oxygen Acetylene Hot melt tool for rigid pipes Nitrogen Pipe bending tool N A N A N A N A N A N A a The waterproof sealant must withstand high temperature higher than 85 C and meet the following requirements It applies to all pipe material PTFE as filler the anaerobic metal pipe thread sealant The glycol solut...

Page 24: ... tools Appearance Specifications and Name Pressure gauge 2 PCS a Charging hose 5 PCS a Vacuum pump Thermocouple temperature sensor Clamp meter Electric balance Protective gloves Multimeter a Two pieces of the pressure gauge and the charging hoses must meet requirements of R410A refrigerant and the charging hoses can withstand pressure more than 4 0 MPa Ensure that the charging hoses match with the...

Page 25: ...d to be prepared by the customer Oil Trap and Inverted Trap Preparations The working pressure for copper pipes oil trap inverted trap and other pipes must be higher than 4 6 MPa Figure 3 1 Oil trap and inverted trap unit mm Table 3 6 Parameters of the oil trap and reverse U shaped oil trap NO Name Configuration Outer diameter and thickness of copper pipes mm Specifications 1 Oil trap Optional 16 0...

Page 26: ...pe reverse trap Optional 19 0 mm x 1 2 mm The inner diameter of both large ends of the copper pipes is 19 0 mm 6 Liquid pipe reverse trap Optional 16 0 mm x 1 0 mm The inner diameter of copper lines is 16 0 mm Note 1 No burr is allowed at the vents of copper pipelines no dent or bulge is allowed on the surface after the pipeline bend Note 2 The bend angle of unmarked parts is 90 Note 3 The bend to...

Page 27: ...rt 1 in the dot line box is a port on the equipment Part 5 hose clamp is mandatory Other parts need to be configured Materials Required for Drainpipes The drainpipe for a humidifier must withstand high temperature higher than 100 C Otherwise the drainpipe may be deformed due to high temperature Two drainpipe connection modes are provided Rigid pipe Fix one end of a hose to the inlet of the equipme...

Page 28: ...d pipes 3 4 inch copper pipe with 3 4 inch BSPP inner thread connector 5 Rigid pipe PP R or C PVC with a 3 4 inch outer thread connector 6 Hose with an inner diameter of 3 4 inch for example EPDM Part 1 in the dot line box is a port on the equipment Parts 2 and 4 are mandatory Other parts do not need to be configured Pipe Support Preparations Figure 3 4 shows the support for refrigerant and water ...

Page 29: ... P E 5 core Length depending on the site survey result Power cable terminal mandatory naked crimping terminal single cord end terminal 4 mm2 20 A inserted depth 10 mm L1 L2 L3 N P E cord end terminal 10 pcs Cable to the group control networking and host Network cable mandatory J73 of main control board to RS 485 port of EMS 8 pin 5 m 1 pcs Voltage jumper mandatory N A N A 1 pcs Water sensor option...

Page 30: ...tory item for the air conditioner in the contract Adjust the height of the support according to the actual situation Figure 3 5 shows the support dimensions for reference Figure 3 5 shows the support dimensions of the air conditioner which installed the enclosure increasing the depth to 1200 mm If not configured the enclosure The size of the depth 1143 mm and 1200 mm all subtract 200 mm when makin...

Page 31: ...Precautions Before installing the NetCol5000 A020 read this section carefully and perform installation by strictly following the guidance in this section Precautions Before installation check that the environment meets the requirements and check whether reconstruction is needed for routing pipes and cables and constructing ventilation pipes Install the NetCol5000 A020 according to the design drawi...

Page 32: ...y using shortest pipes Calculate the number of the components that cause local resistance loss for example bends and convert them into the equivalent length to straight pipes as shown in Table 3 8 The total length L of pipes connecting the indoor unit and outdoor unit equals the equivalent length of the straight pipes plus the length of the straight pipes connecting the indoor unit and outdoor uni...

Page 33: ... load see the NetCol5000 A020 nameplate Only trained and qualified personnel are allowed to connect cables Installation personnel must take protective measures for example wearing protective gloves All precision air conditioners must be reliably grounded 3 1 4 Installation Layout Layout principles for installing the NetCol5000 A020 are as follows If the outdoor unit is placed higher than the indoo...

Page 34: ...r User Manual 3 Installation Guide Issue 01 2014 06 30 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 27 Figure 3 7 Horizontal installation layouts of outdoor units 1 Tilted gas pipeline 2 Inverted trap 3 Oil trap 4 Tilted liquid pipe ...

Page 35: ...ed gas pipeline 2 Inverted trap 3 Oil trap 4 Tilted liquid pipe The specifications for oil trap inverted trap can be prepared by referring to Oil Trap and Inverted Trap Preparations in chapter 3 1 2 Material Preparations In the figure is a sign of a tilt indicating that the scale of the pipe tilting is at least 1 200 The pipe tilting direction should be consistent with the hypotenuse of the right ...

Page 36: ...over secure it to a pallet truck using ropes before moving it When loading and unloading the cabinet keep the gradient within 15 degrees as shown in Figure 3 9 To prevent shocks or falls move the cabinet gently After placing the cabinet in the installation position unpack it and take care to prevent scratches Keep the cabinet steady during unpacking Figure 3 9 Transportation Gradient Procedure Ste...

Page 37: ...10 Unpacking 2 Visually inspect the cabinet appearance for shipping damage If it is damaged notify the carrier immediately Step 3 Check that the fittings comply with the packing list If some fittings are missing or do not comply with the packing list record the information and contact your local Huawei immediately End 3 3 Installation Flowchart Figure 3 11 shows how to install the NetCol5000 A020 ...

Page 38: ...ner User Manual 3 Installation Guide Issue 01 2014 06 30 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 31 Figure 3 11 Installation flowchart 3 4 Mechanical Installation Context Figure 3 12 shows the mechanical installation process ...

Page 39: ...Air Cooled In row Precision Air Conditioner User Manual 3 Installation Guide Issue 01 2014 06 30 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 32 Figure 3 12 Mechanical installation flowchart ...

Page 40: ...uring transportation including two bottom corner metal parts and one mounting ear otherwise the equipment cannot work properly Procedure Step 1 Open the door lock hold both sides of the door pull out the top end of the door 20 cm away from the cabinet and remove cables to the controller panel and ground cables to the bottom of the door Step 2 Rotate the six baffle plates fixing the upper and lower...

Page 41: ... Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 34 Figure 3 14 Removing a side panel Step 5 Removing transportation fasteners 1 Figure 3 15 shows how to remove the sheet metals for fastening the cabinet Figure 3 15 Removing the sheet metals for fastening the cabinet during transportation ...

Page 42: ...ng a wrench with a torque of 15 N m as recommended as shown in 1 to 3 of Figure 3 16 3 Remove the bolt fixing the mounting ear of the compressor using the 13 fixed wrench and pull out the metal part as shown in 4 of Figure 3 16 Figure 3 16 Removing the sheet metals for fastening the compressor during transportation Retain the removed sheet metals and bolts and reinstall them for next device transp...

Page 43: ...uting the refrigerant liquid pipes 6 Hole for routing the refrigerant gas pipes 7 Hole for routing humidifier water supply 8 Reserved hole 9 Hole for routing cables in the top 10 Hole for routing cables in the top 11 Hole for routing cables to the T H sensor Inside diameter of the holes in the top and bottom with ring is 18 5 mm Do not make holes for routing cables in the bottom when routing cable...

Page 44: ...d 37 1 Remove the screws from the fixing plate as shown in Figure 3 18 Figure 3 18 Removing the screws from the fixing plate 2 Install side panels 3 At least four persons are required to lift the equipment from the pallet to the ground 4 Adjust the leveling feet using an adjustable wrench as shown in Figure 3 19 Figure 3 19 Leveling feet Step 8 Installing an enclosure frame optional ...

Page 45: ...o M6 screws as shown in Figure 3 20 Figure 3 20 Installing an enclosure frame 2 Install the front door onto the enclosure frame and connect the bottom ground cable of the front door to the enclosure frame Step 9 Install a support optional 1 Secure the support to the ground by using M12 expansion bolts 2 Place the air conditioner to the support and secure it to the support by using M10 bolts after ...

Page 46: ...ogies Co Ltd 39 Figure 3 21 Secure the air conditioner to the support Step 10 Loosen the screws on the rear door column secure the combining parts to the door by using bolts End 3 5 Install the outdoor unit For details about how to install the outdoor unit see NetCol500 outdoor unit User Manual 3 6 Exhausting Nitrogen Context Figure 3 22 shows the location of needle valves ...

Page 47: ...nologies Co Ltd 40 Figure 3 22 Location of needle valves 1 Liquid pipe needle valve 2 Low pressure needle valve 3 High pressure needle valve Procedure Step 1 Remove the valve bonnet and exhaust the nitrogen slowly You will hear a sound of strong air when exhausting Step 2 Reinstall the valve bonnet until no air exhausts from the needle valve End 3 7 Connecting Pipelines ...

Page 48: ...ures for needle valves 500 mm or near to the welding position by taking out the valve plug or wrapping the valve with wet cloth During the welding process avoid burning the bottom plate top plate and side panels especially the thermal insulation foam labels water pipes and cables During the welding process do not expose the refrigerant pipes for over 15 minutes Otherwise system reliability may det...

Page 49: ...trogen into the pipes to avoid impurity caused by internal oxidation as shown in Figure 3 24 Slowly charge nitrogen into pipes through the high pressure needle valve when welding gas pipes Slowly charge nitrogen into pipes through the liquid needle valve when welding liquid pipes Figure 3 24 Welding schematic diagram Step 2 Take out two straight pipes in the fitting bag which are of an outer diame...

Page 50: ...changing point When the refrigerant pipe is straight add a support every 2500 mm Figure 3 25 Installing a refrigerant pipe unit mm Onsite personnel prepare the required materials and install the supports For details about the pipe support preparations see Oil Trap and Inverted Trap Preparations in 3 1 2 Material Preparations End 3 7 2 Connecting Water Pipes Context Figure 3 26 shows connection of ...

Page 51: ...ing point Take out the connector in the fitting bag install the connector to the other end of the hose and fix the connector using another hose clamp Connect a rigid pipe to the connector You are advised to wrap pipes out of the equipment using thermal insulation foam Remove the drainpipe plug on one end install a hose and fix the hose using a hose clamp You are advised to wrap pipes out of the eq...

Page 52: ...s End 3 8 Electrical Connection 3 8 1 Cable Installation Operation Procedure Keep cables away from the compressors fans and copper pipes otherwise take protective measures and connect cables properly 1 Connect power cables to the indoor unit 2 Connect power cables to the outdoor unit See NetCol500 Outdoor Unit User Manual 3 Install the voltage jumper 4 Connect outdoor unit on off signal cable and ...

Page 53: ...r units and water leakage sensor 3 Ports for power cables 4 JMP voltage jumper port 3 8 2 Connecting Power Cables Context Route power cables from the bottom or the top For how to choose circuit breakers and cables see 3 1 2 Material Preparations Procedure Step 1 Connect L1 L2 L3 N and PE terminals to the corresponding power ports as shown by 1 in Figure 3 28 Step 2 Route a ground cable from the eq...

Page 54: ...opyright Huawei Technologies Co Ltd 47 Figure 3 28 Routing power cables End 3 8 3 Installing the Voltage Jumper Before installing the voltage jumper verify that the voltage jumper matches the mains line voltage Connect the voltage jumper to the JMP terminal of the electrical control box as shown by 4 in Figure 3 27 Figure 3 29 shows a voltage jumper ...

Page 55: ...gnal cables to an indoor unit take effective ESD protection measures You can obtain the signal cables from Huawei or purchase them by yourself Before connecting the cables ensure that choosing cables routing mode top or bottom Figure 3 30 shows the zoomed in view of the control terminal X106 port The port is used for implementing the alarm on the main control board outdoor unit startup and shutdow...

Page 56: ...04 Port for reporting common alarm 2 Reserved Reserved 05 06 Port for the startup and shutdown of an outdoor unit The signal output cables for controlling startup and shutdown of an outdoor unit are connected to terminals 05 and 06 One indoor unit corresponds to one outdoor unit Terminals 05 and 06 are connected to ports 1B 2B and 1A 2A of the outdoor unit respectively N A 07 08 Port for the remot...

Page 57: ...ccurs Current type 12 V DC operating voltage An alarm is generated when the operating voltage is greater than or equal to 3 mA The Huawei product is recommended 13 14 Port for reporting mains outage alarm The signal output cables for reporting mains outage alarms are connected to terminals 13 and 14 The NetCol5000 A020 generates an alarm when mains outage occurs Can connect to the dry contact inpu...

Page 58: ... sensor 3 8 4 2 Connecting Outdoor Unit On Off Signal Cable Procedure Step 1 Route the signal cables through the cable protecting ring on the top or at the bottom of the cabinet and the upper or lower cable hole on one side of the electrical control box Step 2 Connect the terminals 05 and 06 on the control terminal X106 port and terminals 1B 2B and 1A 2A of the outdoor unit Figure 3 31 shows routi...

Page 59: ...he electrical control box Figure 3 31 shows the location of the water sensor Step 3 Use a cable tie to fix the cables on the cabinet End 3 8 5 Teamwork Networking and Monitoring To implement teamwork networking and monitoring you need to connect communications cables and set the DIP switch on the main control board Context J73 teamwork networking ports J73UP and J73DOWN as shown in Figure 3 27 on ...

Page 60: ...cedure Step 1 Connect the networked air conditioner as shown in Figure 3 33 When only teamwork networking is deployed reserve J73UP on the first unit connect J73DOWN of the unit to J73UP of the second unit J73DOWN of the second unit to J73UP of the third unit In this way connect all units involved in teamwork networking as shown by CAN bus in Figure 3 33 When both teamwork networking and RS485 mon...

Page 61: ...n Table 3 11 Set the position of switch 7 onsite based on the application scenarios and ensure that other DIP switches are in the default position as shown in Table 3 11 Table 3 11 Operation of the switches on the main control board Switch Default Value Description 1 OFF Remaining in OFF 2 OFF Remaining in OFF 3 ON Remaining in ON 4 ON Remaining in ON 5 OFF Remaining in OFF 6 ON Remaining in ON 7 ...

Page 62: ...conditioner must differentiate various T H sensors based on DIP switch settings on the sensors that change their communications addresses Figure 3 34 shows an T H sensor Figure 3 34 T H sensor Fix cables to the T H sensor using cable ties The T H sensor is used to detect hot cold aisle temperature Determine the installation position of the T H sensor based on the site situation You are recommended...

Page 63: ... ground and fixed securely using cable ties A maximum of three T H sensors can be connected in hot and cold aisle respectively Step 2 Set DIP switches of the T H sensor Table 3 12 lists how to set Table 3 12 DIP switches of the T H sensor Positi on Name Addr ess DIP Switch Sequence 1 2 3 4 5 6 Return air Return air T H 1 1 ON OFF OFF OFF OFF OFF Cold aisle Cold aisle T H 1 11 ON ON OFF ON OFF OFF ...

Page 64: ...nd Table 3 15 list the items for connections verification Record results in the table after verification Table 3 13 Check items on the indoor unit installation Check Item Expected Result Check Result Remark Cabinet The cabinet is installed properly without any tilts Passed Failed The cabinet is secured to the support by using bolts Passed Failed The foreign matter inside the cabinet such as cable ...

Page 65: ...talled according to the air flow direction on the frame Passed Failed Differential pressure switch The cable ties on the differential pressure tubes are secured Passed Failed There is no foreign matter in the differential pressure tubes The differential pressure tubes are not seriously bent Passed Failed Table 3 14 Check items on the pipes Expected Result Check Result Remark Ports are connected pr...

Page 66: ...quency is within the range of the rated frequency tolerance 3 Hz Passed Failed Cables are intact Passed Failed No open or short circuits or incorrect connections occur in electrical loops Passed Failed The power cables to the indoor and outdoor units the cables between the indoor and outdoor units the communication cables the voltage jumper and the T H sensors are connected properly Passed Failed ...

Page 67: ...ls insulation gloves boots and antifreeze gloves Others torch 4 2 Partially Charging in Refrigerant 4 2 1 Calculation Requirements of Chilled Oil and Refrigerant to Be Charged Partially Charging in Refrigerant If the length of one way liquid pipeline is 7 5 m or shorter Table 4 1 shows the amount of refrigerant to be charged according to the different outdoor unit The actual amount of refrigerant ...

Page 68: ...necting to NetCol500 A0384C11E0 T3 outdoor unit Table 4 3 Refrigerant configuration principle 3 Pipe length L m Gas pipe diameter mm Liquid pipe diameter mm Extra refrigerant charge kg 0 L 25 Φ15 88 Φ12 7 Extended length of the liquid pipe m x 0 1 kg m If the length of one way liquid pipeline is 20 m The total amount of refrigerant charge kg basic refrigerant charge 7 kg extra refrigerant charge 2...

Page 69: ...system Procedure Step 1 Connect the refrigerant oil bucket to the low pressure needle valve and connect the vacuum pump to the high pressure needle valve using hoses as shown in Figure 4 1 Figure 4 1 Charging refrigerant oil 1 Low pressure needle valve 2 High pressure needle valve 3 Vacuum pump 4 Refrigerant oil bucket Step 2 Open the vacuum pump to charge refrigerant oil to the cooling system Ste...

Page 70: ...ssure gauge 4 Nut 5 Vacuum pump Step 2 In the beginning the vacuum pump makes loud noises and exhausts white smoke from the exhaust vent After 10 minutes if it still exhausts white smoke observe it for another 10 minutes because the cooling system may not be sealed properly or there may be too much refrigerant or water in the cooling system Step 3 After 20 minutes the pressure gauge pointers shoul...

Page 71: ... and check whether the pressure increases obviously End 4 2 4 Partially Charging in Refrigerant Prerequisites Before refrigerant charging ensure that the air is exhausted from the hose connecting to the steel vessel of the refrigerant Context Wear protective gloves when handling refrigerant Charge the refrigerant R410A after checking that the cooling system does not leak and the vacuum meets the r...

Page 72: ...Close the pressure gauges and the valve of the steel vessel after charging in refrigerant End 4 3 Power on Preparations Prerequisites In the container data center scenario when the indoor unit is not connected to the outdoor unit before being powered on and no compressor needs to be configured remove the screws fixing the X115 terminals below the electrical control box using a Philip screwdriver a...

Page 73: ... the Voltage Jumper Step 4 Check that signal cables to the indoor and outdoor units are properly connected For details see 3 8 4 1 Preparations Before Connection Step 5 Check that the water leakage sensor is installed into position For details see 3 8 4 3 Connecting a Water Sensor Step 6 If group control networking is deployed check that cables are correctly connected and DIP switches on the main ...

Page 74: ...eater circuit breaker QF2 3 Humidifier circuit breaker QF3 4 Compromise distribution module circuit breaker QF4 5 Main control board circuit breaker QF5 Procedure Step 1 Switch on the external general circuit breaker main circuit breaker QF1 for the indoor unit main control board circuit breaker QF5 and general circuit breaker for the outdoor unit in sequence After the main control board circuit b...

Page 75: ...d humidity set point For details see the system settings in Advanced Cooling Controller User Manual Step 4 If onsite teamwork networking configuration is required You need to configure the parameters End 4 5 Commissioning Procedure Prerequisites Ensure that the outdoor unit has been powered on before the compressor is started Context Table 4 4 describes the mapping relationship between the saturat...

Page 76: ... electric heater and electrode humidifier is not configured skip the commissioning procedures for the electric heater and humidifier Procedure Step 1 Switch on the electric heater circuit breaker QF2 humidifier circuit breaker QF3 and compromise distribution module circuit breaker QF4 Step 2 Tap Start on the LCD choose Maint Diagnostic mode Enter from the main menu For detailed operations see Adva...

Page 77: ...e and wait for 12 hours before starting the compressor 1 Check whether the indicator of the power module is on 2 The water inlet valve YV4 opens automatically you can hear water flow sound to fill water into the humidifier cylinder When the water level reaches the preset threshold YV4 closes automatically The electrode in the humidifier cylinder heats the water and turns water into steam In this p...

Page 78: ... menu tap Shutdown Exercise cautions when performing operations on the equipment because the equipment is under power Step 2 Switch off the front end circuit breaker and the main circuit breaker QF1 You must switch off the front end circuit breaker when replace or maintain the air conditioner components Only switch off the main circuit breaker QF1 when check whether the power off function is norma...

Page 79: ... equipment is operating connect the power supply only after you have finished all equipment connections Wear insulation gloves and shoes when make the electrical maintenance The NetCol5000 A020 belongs to small and medium sized equipment Exercise caution during professional maintenance For details contact Huawei technical support For the maintenance items see 5 2 Indoor Unit Maintenance Items Plea...

Page 80: ... Air filters Check that the filters are not blocked Clean the air filters water cleaning is recommended Check that the filters are not damaged or distorted Replace air filters by referring to5 6 1 Replacing Air Filters Compressor Check that the compressor is fastened properly Retighten the compressor screws Check that the refrigerant oil is not on the valve Clean the refrigerant oil on the valve C...

Page 81: ...r with 20 acetic acid or replace the humidifier cylinder by referring to 5 6 4 Replacing the Humidifier Cylinder After the humidifier starts the current of each phase is less than 1 2 A Remove the humidifier cylinder clean and brush the water scale inside the humidifier cylinder with 20 acetic acid or replace the humidifier cylinder by referring to 5 6 4 Replacing the Humidifier Cylinder Pipes Che...

Page 82: ...n the main control board and the display panel and between the main control board and the T H sensor have proper contact Reconnect the abnormal terminals Check that each input and output connector between the main control board and contactors solenoid valves high low pressure switches electric heater temperature switch have proper contact Reconnect the abnormal terminals Check that various electri...

Page 83: ... It is recommended that you inspect the cooling system at shorter intervals in adverse working environments Before measuring the temperature and pressure of discharge and suction power off the device Deploy thermocouples on the discharge and suction pipes connect pressure gauges to the high pressure and low pressure needle valves and power on the device Wait for 30 minutes and measure the temperat...

Page 84: ...ircle each time About 30 minutes are required to achieve a new balance The thermostatic expansion valve adjusts the suction superheat degree Perform maintenance on the thermostatic expansion valve as follows 1 Check that the sensing bulb is securely installed 2 Check that no fracture exists on the sensing bulb and valve capillary tubes 3 Check that no crack exists at the welding points of the equa...

Page 85: ...ensor which leads to a detection fault 3 The T H sensor at return air vent 2 is faulty 1 Handle the Return air 2 temp invalid alarm 2 Clean the T H sensor at return air vent 2 3 Maintain or replace the T H sensor at return air vent 2 a002 Return air HT Critical The alarm is generated 1 The return air high temperature alarm threshold is inappropriate for the working conditions 2 The temperature dis...

Page 86: ...trical Ports 2 Check cables connecting to the T H sensor 3 Maintain or replace the T H sensor a008 Comp HP switch Major The alarm is generated and the compressor shuts down forcibly 1 Cables to the high pressure switch are loose or damaged 2 The high pressure switch is faulty 3 The solenoid valve is faulty 4 Outdoor fans do not run properly 5 The condenser is blocked 6 The refrigerant is overcharg...

Page 87: ...OTE After the alarm is cleared click Manual clear on the alarm page a012 Comp dis HT Major The alarm is generated and the compressor shuts down forcibly 1 Cables to the high temperature switch are loose or damaged 2 The high temperature switch is faulty 3 Outdoor fans are faulty 4 The condenser is blocked 5 The refrigerant leaks 6 The refrigeration capacity of the NetCol5000 A020 is insufficient o...

Page 88: ... runtime of the fan exceeds the alarm threshold Maintain or replace the indoor fans For details see 5 6 2 Replacing an Indoor Fan Clear the accumulated runtime a022 Humidifier exceed runtime Warning The alarm is generated The humidifier accumulated runtime exceeds the alarm threshold Maintain or replace the humidifier For details about how to replace a humidifier see 5 6 4 Replacing the Humidifier...

Page 89: ...ion and voltage test board is faulty 1 Check the power grid 2 Replace the surge protection and voltage test board a030 Power phase C overvolt Major The alarm is generated and the system shuts down 1 The power grid is unstable 2 The surge protection and voltage test board is faulty 1 Check the power grid 2 Replace the surge protection and voltage test board a031 Power phase A undervolt Major The al...

Page 90: ...The power grid is unstable 2 The surge protection and voltage test board is faulty 1 Check the power grid 2 Replace the surge protection and voltage test board a038 Liquid pipe temp sensor fault Major The alarm is generated 1 The liquid pipe temperature sensor is faulty 2 Cables to the liquid pipe temperature sensor are loose or damaged 1 Maintain or replace the liquid pipe temperature sensor 2 Ch...

Page 91: ... damaged 2 The anti freezing switch is faulty 3 The solenoid valve is faulty 4 The filter dryer is blocked 5 The expansion valve is blocked 6 The refrigerant leaks 1 Check cables to the anti freezing switch 2 Maintain or replace the anti freezing switch 3 Maintain or replace the solenoid coil or solenoid valve 4 Maintain or replace the filter dryer 5 Maintain or replace the expansion valve 6 Check...

Page 92: ...e supply air temperature sensor 4 Calibrate or replace the air filters 5 Check the ambient temperature a050 Cold aisle HT Critical The alarm is generated 1 The high temperature alarm threshold for the cold aisle is inappropriate for the working conditions 2 The temperature displayed on the LCD is different from the actual temperature 3 The refrigeration capacity of the NetCol5000 A020 is insuffici...

Page 93: ... 2 Check cables to the humidifier NOTE After the alarm is cleared click Manual clear on the alarm page a077 Indoor fan 1 2 3 4 5 6 7 8 fault Major The alarm is generated 1 Cables to indoor fan are loose or damaged 2 The indoor fan fuse is faulty 3 Indoor fan is faulty 1 Check cables to the indoor fan 2 Change the fuse 3 Maintain or replace the indoor fan a078 Full water Critical The alarm is gener...

Page 94: ...t Critical The alarm is generated and the system shuts down 1 The surge protection and voltage test board is faulty 2 Cables to the surge protection and voltage test board are loose or damaged 1 Maintain or replace the surge protection and voltage test board 2 Check cables to the surge protection and voltage test board a084 Power fault Critical The alarm is generated and the system shuts down The ...

Page 95: ...nerated 1 The return air low humidity alarm threshold is inappropriate for the working conditions 2 The humidity displayed on the LCD is different from the actual humidity 1 Adjust the return air low humidity alarm threshold 2 Calibrate or replace the T H sensor a103 Indoor fan power alarm Major The alarm is generated and the compressor shuts down 1 The power module is faulty 2 Cables to the power...

Page 96: ...ollection board in the cold aisle a110 Cold aisle 1 2 3 T H brd comm fail Major The alarm is generated 1 DIP switches of the T H sensor are incorrectly set 2 Cables to the temperature and humidity collection board are loose or damaged 3 The T H sensor is faulty 1 Set DIP switches by referring to 3 8 6 Installing T H Sensors 2 Check the temperature and humidity sensor and cables 3 Maintain or repla...

Page 97: ...ity collection board are loose or damaged 3 The temperature and humidity collection board is faulty 1 Set DIP switches by referring to 3 8 6 Installing T H Sensors 2 Check cables to the temperature and humidity collection board 3 Maintain or replace the temperature and humidity collection board in the hot aisle 5 5 Troubleshooting Certain circuits in the NetCol5000 A020 have lethal voltage Only pr...

Page 98: ...Step 4 Contact Huawei technical support End 5 5 2 A Compressor does not Work Symptom The compressor does not work Possible Causes The device generates the faulty alarms A compressor does not need to start Compressor power failure A compressor is faulty Procedure Step 1 Check whether the device generates the faulty alarms as follows Comp HP switch Comp HP switch lock Comp suction LP Comp suction LP...

Page 99: ...nd check whether the fault is rectified If yes troubleshooting is complete If no go to Step 5 If the power input is faulty go to Step 4 Step 4 Check the compressor power supply If the power supply is faulty check whether the compressor cable is normal and the compressor circuit breaker is switched on If there is problem check whether the fault is cleared after solution If yes troubleshooting is co...

Page 100: ...ms exist An indoor fan does not need to start Either the general circuit breaker or the indoor fan circuit breaker is not switched on Power to the indoor fan is abnormal Procedure Step 1 Check whether there are indoor fan fault alarms If yes deal with it by referring to 5 4 Alarm Reference and then check whether the fault is rectified If yes troubleshooting is complete If no go to Step 2 If yes go...

Page 101: ...method Figure 5 1 Measuring the fan input terminals If the power supply is normal judged indoor fan failure replace the indoor fan and check whether the fault is rectified If yes troubleshooting is complete If no go to Step 5 If the power supply is abnormal 1 Check whether the compromise distribution module circuit breaker QF4 is switched on If switched on go to 4 2 2 Open the front door check whe...

Page 102: ...ether the fault is rectified If yes troubleshooting is complete If no go to Step 5 Step 5 Contact Huawei technical support End 5 5 5 Humidification Fails Possible Causes Humidifier alarm exists A humidifier does not need to start Humidification function is not enabled The humidifier circuit breaker is disconnected The humidifier cylinder is damaged Procedure Step 1 Check whether there are humidifi...

Page 103: ... whether the fault is rectified If yes troubleshooting is complete If no go to Step 4 If yes go to Step 4 Step 4 Check whether the circuit breakers are switched on If no switch on the circuit breakers and check whether the fault is rectified If yes troubleshooting is complete If no go to Step 5 If yes go to Step 5 Step 5 Check whether the humidifier cylinder is damaged If yes replace the humidifie...

Page 104: ...tem Settings System Control to enable the electric heater function and check whether the fault is rectified If yes troubleshooting is complete If no go to Step 4 If yes go to Step 4 Step 4 Check whether the electric heater circuit breaker QF2 is switched on If no switch on the circuit breakers and check whether the fault is rectified If yes troubleshooting is complete If no go to Step 5 If yes go ...

Page 105: ...level floats are damaged or locked If yes replace or adjust the water level floats and check whether the fault is rectified If yes troubleshooting is complete If no go to Step 3 If no go to Step 3 Step 3 Check whether the inlet pipe and drainpipe leak If yes rectify any leakage and check whether the fault is rectified If yes troubleshooting is complete If no go to Step 4 If no go to Step 4 Step 4 ...

Page 106: ...sensor is set correctly by referring to 3 8 6 Installing T H Sensors If no set it correctly by referring to 3 8 6 Installing T H Sensorsand check whether the fault is rectified If yes troubleshooting is complete If no go to Step 3 If yes go to Step 3 Step 3 Check whether the T H sensor is faulty If yes replace it by referring to 5 6 9 Replacing an T H Sensor and check whether the fault is rectifie...

Page 107: ... is blown replace it and check whether the fault is rectified if not go to Step 3 If the transformer fuse is normal check whether the transformer is faulty if yes replace it and check whether the fault is rectified if not go to Step 3 Step 3 Check the terminals on main control board and LCD are secured firmly If the connection is not secured fasten the cable connection and check whether the fault ...

Page 108: ... is under power Step 2 Remove the rear door Step 3 Turn the plates on both sides for fixing the upper air filter as shown in step 1 of Figure 5 3 Step 4 Draw out the air filter as shown in step 2 of Figure 5 3 Figure 5 3 Removing the air filter Step 5 Draw out the lower air filter using the same way Step 6 Install new air filters following the air flow direction instruction on the air filter frame...

Page 109: ...e main menu switch off the main circuit breaker QF1 and the front end circuit breaker Exercise cautions when performing operations on the equipment because the equipment is under power Remove the rear door and the air filters when switch off the main circuit breaker QF1 Step 2 Remove the cables to the controller and ground cables Pay attention to the fasteners when pushing the controller panel fro...

Page 110: ... diagnostic mode Step 9 Install the air filters and rear door if no problem is found End Follow up Procedure Choose Maint Performance Maintenance on the main menu to clear the accumulated running time of the indoor fan 5 6 3 Replacing the Compressor Prerequisites Recommended tools protective gloves a Phillips screwdriver a heat gun sealant for sealing refrigerant pipelines seal rings for angle val...

Page 111: ...tall a new compressor immediately after you remove the rubber plugs of the suction inlet and exhaust outlet to prevent the moisture Figure 5 5 shows an angle valve Figure 5 5 Angle valve 1 Nuts for fixing the angle valve 2 Adjustable nuts 3 Nuts for fixing pipelines Procedure Step 1 Tap Shutdown on the main menu switch off the main circuit breaker QF1 and the front end circuit breaker Exercise cau...

Page 112: ...at gun wait for about 10 minutes 4 Fix nuts for fixing angle valves and pipes using two 30 adjustable wrenches as shown in 2 of Figure 5 6 and loosen the adjustable nut using a 30 adjustable wrench to apart the discharge pipes and angle valves Then seal the discharge vent to ensure that the system is clean and does not draw in moisture 5 Remove four bolts under the compressor support using a 13 ra...

Page 113: ...eat tape of the crank case Step 12 Install the new compressor to the equipment Seal the thread connecting points of pipes using sealant Check the compressor input power phase sequence is consistent with the terminal after installing Step 13 Vacuumize the system and charge in refrigerant by referring to 4 2 Partially Charging in Refrigerant Step 14 Properly connect cables to the compressor and star...

Page 114: ...ered off wait for a period and replace the humidifier tank until the pipeline temperature is approximate to the room temperature to avoid scald Procedure Step 1 Press down the drainage button to I on one side of the electrical control box to drain the water out of the humidifier cylinder Step 2 Tap Shutdown on the main menu switch off the main circuit breaker QF1 and the front end circuit breaker ...

Page 115: ...of Figure 5 7 Step 6 Install a new humidifier cylinder by reversing operations in Step 3 to Step 5 Step 7 Fasten the tie on the humidifier cylinder Step 8 Power on the humidifier choose Maint Diagnosis mode on the main menu and enter 100 The water is injected to the humidifier Check whether the humidifier works properly If yes exit the diagnosis mode Step 9 Drain the water from the humidifier cyli...

Page 116: ...eaters avoid dead bends on the capillary tube of the temperature switch The electric heater rack is inside the NetCol5000 A020 Exercise caution during maintenance to prevent internal components from scratches or damage Procedure Step 1 Tap Shutdown on the main menu switch off the main circuit breaker QF1 and the front end circuit breaker Exercise cautions when performing operations on the equipmen...

Page 117: ...inlet temperature sensor Step 5 Take out terminals of cables to the fans from the front side the front position as shown in Figure 5 1 Step 6 Remove the 10 screws fixing the bottom four fan supports using a Phillips screwdriver as shown in 2 of Figure 5 8 Pull out the fan supports Step 7 Remove two screws fixing the electric heater support and cut off cable ties fixing capillary tubes to the sensi...

Page 118: ...6 30 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 111 Figure 5 9 Removing the electric heater support Step 8 Remove only the four screws fixing the electric heater and take down the electric heater without removing the sensing bulb as shown in Figure 5 10 Figure 5 10 Removing the electric heater ...

Page 119: ...support as shown in 5 6 2 Replacing an Indoor Fan Step 10 Power on the equipment choose Maint Performance Maintenance Enter on the main menu manually start the electric heater and check whether the electric heater works properly Exit the diagnostic mode if no problem is found Step 11 Install the air filters and rear door if no problem is found End Follow up Procedure Choose Maint Performance Maint...

Page 120: ...in circuit breaker QF1 and the front end circuit breaker Exercise cautions when performing operations on the equipment because the equipment is under power Remove the rear door and the air filters when switch off the main circuit breaker QF1 Step 2 Lever the solenoid coil in the liquid solenoid valve using the flat screwdriver and pull the solenoid coil together with the junction box out of the ca...

Page 121: ...ch Step 3 Open the junction box to the solenoid valve disconnect male cord terminals of two power cables and one PE ground cable and take out the solenoid coil Step 4 Install the new solenoid coil and assemble the junction box by repeating preceding operations in a reverse manner Step 5 Fix the solenoid coil onto the sleeve using bolts Step 6 Install the air filters and rear door if no problem is ...

Page 122: ...he handle lift the electrical control box pull out the electrical control box along the guide rails as shown in 2 of Figure 5 12 and place it on the ground in a horizontal manner Figure 5 12 Dismantling the electric control box Step 4 Remove screws on the cover of the electrical control box using the Phillips screwdriver open the electrical control box and replace faulty components in the electric...

Page 123: ...ol Board 2 Remove screws securing the main control board and take out the main control board 3 Set DIP switches on the new main control board by referring to3 8 5 Teamwork Networking and Monitoring Ensure that the DIP switches are set the same as before 4 Install the main control board and connect cables 5 Check that cables are connected properly by referring to E Schematic Diagram of the Main Con...

Page 124: ...Manual 5 System Operation and Maintenance Issue 01 2014 06 30 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 117 Figure 5 13 Probe position of the return air temperature sensor Figure 5 14 Probe position of the supply air temperature sensor ...

Page 125: ...e sensor on the front door column using a Phillips screwdriver take down the supply air temperature sensor and cut off the cable ties fixing cables to the sensor Step 4 Disconnect the waterproof connectors from the sensor cables 50 cm below the sensor Step 5 Install the new sensor probe and fix it using R shaped cable ties Step 6 Connect the waterproof connectors to sensor cables Step 7 Install th...

Page 126: ...ff the main circuit breaker QF1 Step 2 Remove terminals connecting to RS485_IN and RS485_OUT Step 3 Pull out the T H sensor as shown in Figure 5 15 Figure 5 15 Replacing an T H sensor Step 4 Install a new ambient temperature and humidity sensor and connect terminals to RS485_IN and RS485_OUT Step 5 Install the air filters and rear door if no problem is found End 5 6 10 Replacing the Power Module P...

Page 127: ...ations on the equipment because the equipment is under power Remove the rear door and the air filters when switch off the main circuit breaker QF1 Step 2 Push down the buckle button on the power module as shown in 1 of Figure 5 16 Figure 5 16 Removing the power module Step 3 Pull out the buckle as shown in 2 of Figure 5 16 and then pull out the power module from plug in frame Step 4 Push the spare...

Page 128: ... Shutdown on the main menu switch off the main circuit breaker QF1 and the front end circuit breaker Exercise cautions when performing operations on the equipment because the equipment is under power Remove the rear door and the air filters when switch off the main circuit breaker QF1 Step 2 Remove the front door cables to the controller and ground cables Step 3 Remove the fan at the most bottom o...

Page 129: ...n the screw to fix the float and ensure that the float is horizontal Step 7 Install the bottom fan and front door Step 8 Install the air filters and rear door if no problem is found End 5 6 12 Replacing the LCD Prerequisites Recommended tool Phillips screwdriver The LCD needs to be replaced A spare and functional LCD is available Context The front door is opened for front access maintenance Proced...

Page 130: ...nt door cables to the controller and ground cables Do not use too much force otherwise the cables to the controller and communication port may be damaged Figure 5 18 Replacing the LCD Step 3 Hold the LCD screen from the front and remove four screws on the back of the screen using a Phillips screwdriver and remove the LCD screen as shown in Figure 5 18 Step 4 Take a spare LCD screen and fix it onto...

Page 131: ...tial Copyright Huawei Technologies Co Ltd 124 A Acronyms and Abbreviations A ACC Advanced cooling controller C CFD Computational fluid dynamics CAN Controller area network D DC Direct current E EC Electronic commutation P PTC Positive temperature coefficient R RCCB Residual current circuit breaker T TFT Thin film transistor U USB Universal Series Bus ...

Page 132: ...ng out the Cooling System 1 Compressor 2 Check valve 3 Oil trap 4 Outdoor unit 5 Inverted trap 6 Filter drier 7 Sight glass 8 Liquid solenoid valve 9 Thermostatic expansion valve 10 Evaporator 11 Indoor fan 12 Hot gas bypass valve Figure B 1 the pipelines in solid line are installed by Huawei before delivery Figure B 1 the pipelines in dashed line are to be routed onsite by technical personnel Hua...

Page 133: ... 1 Main control board 2 Circuit breakers from left to right main circuit breaker QF1 electric heater circuit breaker QF2 humidifier circuit breaker QF3 compromise distribution module circuit breaker QF4 and main control board circuit breaker QF5 3 PE ground cable 4 Contactor and relay relay function is reserved Contactor from left to right compressor AC contactor KM1 electric heater AC contactor K...

Page 134: ... X103 signal terminals for 5 8 fan 7 X104 signal terminals for solenoid valve 8 X101 signal terminals for humidifier and floats 9 24 V AC transformer 10 Surge protection and voltage test board 11 Humidification controller 12 Main control board port 13 Teamwork communications port 14 External terminal block 15 Manual drainage of the humidifier 16 External power cable and PE port 17 Male socket of t...

Page 135: ...D Electrical Schematic Diagram D Electrical Schematic Diagram NetCol5000 A020 Air Cooled In row Precision Air Conditioner User Manual ...

Page 136: ...E Schematic Diagram of the Main Control Board E Schematic Diagram of the Main Control Board NetCol5000 A020 Air Cooled In row Precision Air Conditioner User Manual ...

Page 137: ...NetCol5000 A020 Air Cooled In row Precision Air Conditioner User Manual F Schematic Diagram of the Voltage Jumper F Schematic Diagram of the Voltage Jumper ...

Page 138: ...G Control Schematic Diagram of the Humidifier Cylinder G Control Schematic Diagram of the Humidifier Cylinder NetCol5000 A020 Air Cooled In row Precision Air Conditioner User Manual ...

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