Gree MULTI VRF SYSTEM II GMV-120WL/A-T Service Manual
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Gree MULTI VRF SYSTEM II GMV-120WL/A-T Service Manual

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DC INVERTER MULTI VRF SYSTEM II
SERVICE MANUAL
R410A(GC201407- Π )

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Summary of Contents for Gree MULTI VRF SYSTEM II GMV-120WL/A-T

  • Page 1 DC INVERTER MULTI VRF SYSTEM II SERVICE MANUAL R410A(GC201407- Π )

  • Page 2: Table Of Contents

    CONTENTS PRODUCT ..................... 2 1 PRODUCT LIST ..........................2 2 NOMENCLATURE ..........................2 3 PRODUCT FEATURES ........................2 4 SPECIFICATIONS ..........................3 5 PRODUCT CAPACITY CORRECTION ..................... 4 6 PRINCIPAL OF OPERATION ......................5 CONTROL ...................... 7 1 Units’ Control .............................7 2 Wired Controller ..........................7 3 Remote Controller ...........................12 4 Debugging Software ........................14 INSTALLATION ....................
  • Page 3 DC Inverter Multi VRF System II Service Manual PRODUCT PRODUCT...

  • Page 4: Product

    3.1 General introduction Gree DC Inverter Multi VRF System II is the latest generation of DC inverter units. One set of air-cooled outdoor unit can be connected with multiple direct evaporation indoor units that are of the same or different forms and capacity. This refrigerating system can directly provide air conditioning for one or more areas, and is applicable for residential and light commercial uses.

  • Page 5: Specifications

    DC Inverter Multi VRF System II Service Manual Due to the latest communication method—CAN Bus Communication, system’s anti-interference capability is stronger and the control on indoor units is more accurate, with higher reliability. Specialized shield wire is no more needed and ordinary communication wire can be applied in the construction, which has increased the installation flexibility.

  • Page 6: Product Capacity Correction

    DC Inverter Multi VRF System II Service Manual 5 PRODUCT CAPACITY CORRECTION 5.1 Correction factor of indoor and outdoor temperature (1) Correction factor of cooling capacity (2) Correction factor of heating capacity -15 -10 15 16 5.2 Correction factor of pipe length and height difference (1) Symbol description: Hp: Height difference in case indoor unit is below outdoor unit (m);...

  • Page 7: Principal Of Operation

    DC Inverter Multi VRF System II Service Manual 6 PRINCIPAL OF OPERATION Components in flowcharts are presented according to the following table: Name Compressor 4-way valve Cut-off valve One-way valve Capillary tube Symbol Gas-liquid Pressure Pressure Axial-flow finned heat Name Electronic expansion valve separator switch...
  • Page 8 DC Inverter Multi VRF System II Service Manual CONTROL CONTROL...

  • Page 9: Control

    DC Inverter Multi VRF System II Service Manual CONTROL 1 Units’ Control (1) Schematic diagram of units’ control Control output 4-way valve Compressor Power supply Wired controller, ODU control main board remote controller ８８ or remote monitor Digital display tube Control input (2) Interpretation on the schematic diagram...
  • Page 10 DC Inverter Multi VRF System II Service Manual Fig. 1.1 Appearance of wired controller Fig. 1.2 LCD graphics of wired controller LCD Display Instruction ّ Table 1.1 LCD display instruction Symbols Instructions Up and down swing function Left and right swing function It's valid under Save mode and displays during setting process.
  • Page 11 DC Inverter Multi VRF System II Service Manual Fan mode Heating mode When inquiring or setting project number of indoor unit, it displays "NO." icon Floor Heating mode (When Heating and Floor Heating simultaneously shows up, it indicates 3D Heating is activated.) Display "SET"...
  • Page 12 DC Inverter Multi VRF System II Service Manual Button Graphics ّ Fig. 1.3 Button graphics 2.2 Installation and removal 2.2.1 Installation dimensions Unit:mm 42.5 Unit:mm Fig.2.1.1 Dimension of wired controller 2.2.2 Installation method Fig. 2.2.2 Installation diagram for wired controller Above is a simple installation method of wired controller.
  • Page 13 DC Inverter Multi VRF System II Service Manual 2.2.3 Removal method Fig.2.1.3 Removal of Wired Controller 2.2.4 Connection of communication cord There are 4 ways to connect wired controller with indoor units’ network: Outdoor unit Outdoor unit Indoor unit Indoor unit Fig.

  • Page 14: Remote Controller

    DC Inverter Multi VRF System II Service Manual Outdoor unit Indoor unit 16 Indoor unit 1 Indoor unit 2 Fig. 3.6 Two wired controllers control multiple indoor units simultaneously 3 Remote Controller (1) Remote controller YAD1F 1) Button name and function introduction (outside) Button name Function ON/OFF...
  • Page 15 DC Inverter Multi VRF System II Service Manual (2) Remote controller YV1L1 Button name Function ON/OFF Turn on or turn off the unit Set fan speed ▲/▼ Set temperature and time MODE Set operation mode Set quiet function Set health function and air function Set left&right swing status Set up&down swing status X-FAN...

  • Page 16: Debugging Software

    Gree Commissioning Tool Kits can monitor and control the 2nd generation of Gree Multi VRF. User can monitor and control units by monitoring the computer. This software is an efficient tool for the intelligent air conditioning management as well as installation and after- sales service and commissioning.
  • Page 17 (A and B are equal). HBS interface: When HBS converter is under HBS communication mode, connect air conditioner’s HBS data interface. HBS ّ interface exhibits no polarity (This interface is not yet available for Gree debugger and the monitoring software). CONTROL...
  • Page 18 They are only different in length. One end of the wire shall connect with air conditioner’s communication interface and the other end shall connect with CAN interface of Gree USB converter. As shown below, the wire can be connected to the communication interface of outdoor unit or the communication interface of indoor unit: 4.4 Software introduction...
  • Page 19 Gree Commissioning Tool Kits is applicable to air conditioning system that comsists of multiple series and models. Later, it will be developed to cover all series of Gree central air conditioners, such as multi VRF, centrifugal chiller, screw type chiller, ground source heat pump units, modular units, fan coiled units, close control units, etc. It can be used by system and controller designers to develop and monitor units, or used for maintenance and commissioning.
  • Page 20 DC Inverter Multi VRF System II Service Manual 4.4.1.2 Installation flowchart This flowchart describes basically the software installation process. See below for details. 4.4.1.3 Installation process (1) Install .Net Framework 4.0 If your computer has installed .Net Framework 4.0 or versions above, there’s no need to install again. Otherwise, click “Install .Net ّ...
  • Page 21 DC Inverter Multi VRF System II Service Manual Extracting files ّ Click and select “I have read and accept the license terms”. Then click “Install”. ّ Installation is in progress. ّ CONTROL...
  • Page 22 DC Inverter Multi VRF System II Service Manual Click “Finish” to complete the installation. ّ (2) Install Access Driver Before operating Gree commissioning software, please first install Access Driver (necessary for versions below OFFICE 2007). ّ Click “Install Access Driver”. Click ”Next”. ّ...
  • Page 23 DC Inverter Multi VRF System II Service Manual Click “Browse” to change the default folder to the expected one, or click “Install” to continue the installation. ّ Installation is in progress. ّ  C lick “Ok” to complete the installation. ّ...
  • Page 24 DC Inverter Multi VRF System II Service Manual (3) Install Gree Debugger Before installing Gree debugger, make sure that your computer is installed with .Net Framework 4.0 or versions above. Then click ّ “Install Gree Debugger”. Click “Next”. ّ Click “Browse” to select installation folder. If no change is needed for the folder, click “Next” to continue the installation.
  • Page 25 DC Inverter Multi VRF System II Service Manual Installation is in progress. ّ Click “Close” to complete the installation. ّ (4) Install USB Converter Driver If USB converter driver is already installed in your computer, this part can be skipped. Otherwise, click “Install USB Converter ّ...
  • Page 26 This window will exit after installation is finished. ّ (5) Install Gree USB Data Converter If converter baud rate is needed to be set, then converter configuring software must be installed. Click “Install Gree USB Data ّ Converter”. Then select the setup language. You can choose Chinese ”simplified”, Chinese “traditional” or English. Then click “OK”.
  • Page 27 DC Inverter Multi VRF System II Service Manual Click “Browse” to select your expected installation folder. Click “Next” to continue. ّ Click “Browse” to change folder. Click “Next” to continue. ّ If you want to create s desktop shortcut, tick “Creat a desktop icon”. Then click “Next” to continue. ّ...
  • Page 28 ّ Click “Finish” to complete the installation. ّ 4.4.3 Data monitoring Start up Gree Debugger. ّ On the original interface, user can select language and units system. Click “OK” to confirm the defaulted language and units system ّ and start up the software.
  • Page 29 DC Inverter Multi VRF System II Service Manual Select system of units. ّ If units you want to monitor are already connected, and able to communicate normally, with correct COM and protocal, then you ّ may click “Connect” to enter the interface of numbers. Otherwise, connect in accordance with the connection diagram shown below. COM selection: the serial port in your computer can be detected automatically.
  • Page 30 DC Inverter Multi VRF System II Service Manual After the selection, click “Connnect”. If units can communicate normally with computer, then the interface of numbers will be shown ّ soon. Otherwise, “Connecting” will be shown. There are several display zones on this interface. You can hide devices information and system information by clicking devices ّ...
  • Page 31 DC Inverter Multi VRF System II Service Manual Title bar Error display Menu bar System info Outdoor modules info IDU info Status bar On the display zone of devices information, you may click to select and view units that need monitoring. ّ...
  • Page 32 DC Inverter Multi VRF System II Service Manual ّ If “OK” button is displayed, it means user needs to judge whether to continue debugging or not. Click icon and relevant information will be shown for your reference. Click “Close” to close the pop-up (For No.3 Confirm ODU Basic Module NO. and No.4 Confirm IDU NO., the current number of units under debugging will be displayed.
  • Page 33 DC Inverter Multi VRF System II Service Manual 4.4.5 Control units Click icon of “Setting” on menu bar and select parameter settings, which include “Gateway Settings”, “IDU Settings”, “System ّ Settings”, “Project Number Conflict (In case there is project number conflict in indoor units, other functions will be shielded. Then this parameter needs to be set in order to eliminate the conflict)”...
  • Page 34 DC Inverter Multi VRF System II Service Manual 4.4.6 Other functions (1) Capture screen Click icon of “Capture Screen” to print the interface. If you want to open the interface, click “Open”. ّ (2) Search for database folder Click icon of “Open Data Folder” on the menu bar to open database folder. ّ...
  • Page 35 DC Inverter Multi VRF System II Service Manual (3) Conversion of pressure value Click icon of “Others” on the menu bar and then click “Display Settings” to select “High Low Pressure Value” and “Refrigerant ّ Type”. Select “Temperature” and the pressure parameter displayed on the interface will be temperature. Select “Pressure” and the pressure parameter displayed on the pressure interface will be pressure.
  • Page 36 5.4.7 Usage of USB Converter Gree commissioning software should be connected with CAN interface when converter is used. For air conditioners with a single system, connect D1 and D2 interfaces of the wiring board. For air conditioners with multiple systems, connect G1 and G2 interfaces of the wiring board.
  • Page 37 Notice: If it’s the first time your PC uses Gree USB data converter, in order to prevent Gree USB data converter from being mistaken by your computer as other devices and make sure your mouse can work well, it is necessary to turn off the Serail Enumerator of computer after Gree USB data converter is connected.
  • Page 38 DC Inverter Multi VRF System II Service Manual Step 3: Right-click ”USB Serial Port (COM6) and then click ”Properties”. The dialog box of properties will then pop up. Step 4: Then click ”Port Settings” in the dialog box. Step5: Click ”Advanced” and then a new dialog box will pop up. Find the ”Serial Enumerator” in the miscellaneous options and cancel the tick.
  • Page 39 DC Inverter Multi VRF System II Service Manual Usage of converter configuring software: When the converter is working, hold the button ”SET” for 5 sec. Function LED will be flickering, indicating that the converter has ّ enter the baud rate setting mode. Then you can use the converter configuring software to set the baud rate of converter. Baud rate supported by the converter (baud rate of air conditioner’s communication interface matches with the baud rate of USB interface automatically): Ex-factory defaulted baud rate: (unit: bps)
  • Page 40 DC Inverter Multi VRF System II Service Manual If you want to restore ex-factory settings, click “Default” to restore the default settings. ّ Click “Get” to get the current setting details of converter. ّ Switchover of Software Languages ّ CONTROL...
  • Page 41 DC Inverter Multi VRF System II Service Manual CONTROL...
  • Page 42 DC Inverter Multi VRF System II Service Manual INSTALLATION...

  • Page 43: Installation

    DC Inverter Multi VRF System II Service Manual INSTALLATION 1.Engineering Installation Preparation and Notice 1.1 Installation notice Personnel and property safety are highly concerned during the entire installation process. Installation implementation must abide by relevant national safety regulations to ensure personnel and property safety. All personnel involved in the installation must attend safety education courses and pass corresponding safety examinations before installation.

  • Page 44: Installation Materials Selection

    DC Inverter Multi VRF System II Service Manual The refrigerant pipe or condensate Water can easily condensate and drip to damage the indoor decoration, or even water pipe does not meet the insulation trigger the protection mode of system due to overheating operation. requirement.

  • Page 45: Installation Of Outdoor Unit

    DC Inverter Multi VRF System II Service Manual IDUs and between the IDU and ODU. Communication cable selection for ODU and IDUs. Communication Cables Number of Wire Pieces x Wire Type Between IDU and Indoor Wire Standard Remark Wire Diameter (mm2) (Outdoor) Unit L(m) If the wire diameter is Common sheath twisted...
  • Page 46 DC Inverter Multi VRF System II Service Manual installation site; The installation shall be done by professional technicians. ّ 4.5 Fixing and damping of unit The outdoor unit shall be fixed with 4 M12 bolts and closely contacted with the foundation. Otherwise, big vibration and noise will be caused.

  • Page 47: Installation Of Outdoor Unit

    DC Inverter Multi VRF System II Service Manual 5 Installation of Outdoor Unit 5.1 Installation of quiet design duct type indoor unit 5.1.1 Outline and installation dimension Item Model GMV-ND22~36PL/B-T GMV-ND40~63PL/B-T 1060 1010 GMV-ND72PL/B-T 1360 1310 5.1.2 Installation space 5.1.3 Installation notice (1) Installation dimension (refer to the outline dimension in the figure).
  • Page 48 DC Inverter Multi VRF System II Service Manual Model GMV-N22G/A3A-K;GMV-N28G/A3A-K GMV-N22G/A2A-K;GMV-N28G/A2A-K GMV-N22G/A4A-K;GMV-N28G/A4A-K GMV-N22G/A8A-K;GMV-N28G/A8A-K GMV-N22G/C9A-K;GMV-N28G/C9A-K GMV-N22G/A3A-D;GMV-N28G/A3A-D GMV-N22G/A2A-D;GMV-N28G/A2A-D GMV-N22G/A4A-D;GMV-N28G/A4A-D GMV-N22G/A8A-D;GMV-N28G/A8A-D GMV-N22G/C9A-D;GMV-N28G/C9A-D GMV-N36G/A3A-K;GMV-N45G/A3A-K GMV-N50G/A3A-K; GMV-N36G/A2A-K;GMV-N45G/A2A-K GMV-N50G/A2A-K; GMV-N36G/A4A-K;GMV-N45G/A4A-K GMV-N50G/A4A-K; GMV-N36G/A8A-K;GMV-N45G/A8A-K GMV-N50G/A8A-K; GMV-N36G/C9A-K;GMV-N45G/C9A-K GMV-N50G/C9A-K; GMV-N36G/A3A-D;GMV-N45G/A3A-D GMV-N50G/A3A-D; GMV-N36G/A2A-D;GMV-N45G/A2A-D GMV-N50G/A2A-D;GMV-N36G/A4A-D;GMV-N45G/A4A-D GMV-N50G/A4A-D; GMV-N36G/A8A-D;GMV-N45G/A8A-D GMV-N50G/A8A-D; GMV-N36G/C9A-D;GMV-N45G/C9A-D GMV-N50G/C9A-D; GMV-N56G/A3A-K;GMV-N63G/A3A-K GMV-N71G/A3A-K; GMV-N56G/A2A-K;GMV-N63G/A2A-K GMV-N71G/A2A-K;...
  • Page 49 DC Inverter Multi VRF System II Service Manual 5.2.2 Installation space 5.2.3 Installation notice (1) Installation dimension (refer to the outline dimension in the figure shown above) (2) Installation foundation Make sure the top hanger has sufficient strength to withstand the weight of unit. (3) Installation site and environment Keep the unit from insolation and rain;...
  • Page 50 DC Inverter Multi VRF System II Service Manual 5.2.5 Selection of air switch and power cord Minimum sectional area of Minimum sectional area of Model Power specification Capacity of air switch grounding wire power cord GMV-N22G/A3A-K GMV-N22G/A2A-K GMV-N22G/A4A-K 220-240V ~ 50Hz GMV-N22G/A8A-K GMV-N22G/C9A-K GMV-N28G/A3A-K...
  • Page 51 DC Inverter Multi VRF System II Service Manual GMV-N36G/A3A-D GMV-N36G/A2A-D GMV-N36G/A4A-D 208~230V ~ 60Hz GMV-N36G/A8A-D GMV-N36G/C9A-D GMV-N45G/A3A-D GMV-N45G/A2A-D GMV-N45G/A4A-D 208~230V ~ 60Hz GMV-N45G/A8A-D GMV-N45G/C9A-D GMV-N50G/A3A-D GMV-N50G/A2A-D GMV-N50G/A4A-D 208~230V ~ 60Hz GMV-N50G/A8A-D GMV-N50G/C9A-D GMV-N56G/A3A-D GMV-N56G/A2A-D GMV-N56G/A4A-D 208~230V ~ 60Hz GMV-N56G/A8A-D GMV-N56G/C9A-D GMV-N63G/A3A-D GMV-N63G/A2A-D GMV-N63G/A4A-D...
  • Page 52 DC Inverter Multi VRF System II Service Manual MAINTENANCE...

  • Page 53: Debugging & Maintenance

    DC Inverter Multi VRF System II Service Manual DEBUGGING & MAINTENANCE 1 Debugging of Unit Caution: ① . After the initial installation is finished and the main board of outdoor unit is replaced, it must perform debugging. Otherwise, the unit can’t operate.
  • Page 54 DC Inverter Multi VRF System II Service Manual LED3 displays quantity of indoor unit. The quanity of indoor unit shall be confirmed by perform. If the actural quantity of indoor unit is different from the displayed quantity, cut off the power for indoor unit and outdoor unit.
  • Page 55 DC Inverter Multi VRF System II Service Manual The system detected that there’s malfunction for the parts of indoor unit. XXXX indicates the engineering series code for the indoor unit with malfunction. 3s later, corresponding malfunction code will be displayed. Eg: When there is malfunction d5 and d6 XXXX/corresponding for no.
  • Page 56 DC Inverter Multi VRF System II Service Manual Dermination status for valve of outdoor unit; After compressor operating for about 2min, it will stop operation. It will judge the ON status of gas valve and liquid valve for outdoor unit. The judement result is displayed as below: Valve for outdoor unit hasn’t been opened completely.
  • Page 57 DC Inverter Multi VRF System II Service Manual Debugging under heating mode. If there’s no malfunction after the compressor operates for 30min, it will enter into process 17 to finish debugging; Or short press SW7 button on main board during operation process to confirm the completion of debugginig.

  • Page 58: Malfunction List

    DC Inverter Multi VRF System II Service Manual ●The unit will operate under cooling mode when the ambient temperature is 25~35℃ , the low pressure Low pressure of value for the system is 0~8℃ . ℃ system ●The unit will operate under heating mode when the ambient temperature is above -5℃...
  • Page 59 DC Inverter Multi VRF System II Service Manual Indoor fan Wrong series for one- Malfunction of jumper cap protection to-more indoor unit E-heater Alarming due to bad air Abnormal address for indoor unit protection quality Water overflow The indoor unit model Abnormal PCB for wired controller protection can’t match with...
  • Page 60 DC Inverter Multi VRF System II Service Manual Abnormal clock of Malfunction driven board Driven board of compressor works system for compressor abnormally Power voltage Reset protection for protection for the the driven module of Driven PFC protection of compressor driven board of compressor compressor...

  • Page 61: Troubleshooting

    DC Inverter Multi VRF System II Service Manual Charge refrigerant 送风 Fan blow Cleaning alarm for filter by hand Startup debugging Long-distance emergency Emergency stop confirmation of unit stop Limit opereation SE setting for the operation Defrosting period K 1 setting Upper limit setting for the collocation Limit setting for the...
  • Page 62 DC Inverter Multi VRF System II Service Manual (2) High pressure protection )J HI Q SF TT VS F QS PU FDUJ P O .F BTVS F XI FU IFSUI F IJHI .F BTVS F XI FU IFS 3 FQM BDF NB JO C PBSE QS FTTV SF J T U PP IJHI X JU I UI F QS FTTV SF T XJUD I PG P VU EPPS V OJ U...
  • Page 63 DC Inverter Multi VRF System II Service Manual (3) Low-pressure protection Low pressure protection Measure whether the low Measure whether the R eplace main board of pressure is too low with pressure switch is outdoor unit manometer normal R eplace pressure switch C heck whether the C harge refrigerant according to t he volume on nameplate;...
  • Page 64 DC Inverter Multi VRF System II Service Manual (4) Discharge temperature protection...
  • Page 65 DC Inverter Multi VRF System II Service Manual (5) Mafunction of temperature sensor (6) Malfunction of sensor (7) Unit and main board can’t be energized...
  • Page 66 DC Inverter Multi VRF System II Service Manual (8) Failure start-up (9) Reset protection for drive module of compressor, drive PFC protection for compressor, malfunction of drive temperature sensor for compressor, circuit malfunction of drive current detection for compressor (10) Drive IPM overtemperature protection for compressor...
  • Page 67 DC Inverter Multi VRF System II Service Manual (11) Desynchronizing protection for inverter compressor (12) Failure startup for inverter compressor...
  • Page 68 DC Inverter Multi VRF System II Service Manual (13) Loop malfunction of driven charging for compressor (14) Malfunction of memory chip for inverter compressor...
  • Page 69 DC Inverter Multi VRF System II Service Manual (15) Overcurrent protection for inverter compressor, IPM module protection, phase-lacking of inverter compressor (16) High pressure protection for driven DC bus bar of compressor, low pressure protection for driven DC bus bar of compressor...

  • Page 70: Power Distribution Of Unit

    DC Inverter Multi VRF System II Service Manual (17) AC current protection for inverter compressor (18) Communication malfunction between main contoller and driver of inverter compressor 4 Power Distribution of Unit 4.1 Power distribution of unit The control logical relationship among parts inside the electric box of unit is showed by the mongline diagram (CAD source file). The main loop is showed by bold line (line width: 1mm);...
  • Page 71 DC Inverter Multi VRF System II Service Manual 4.2 Main electric parts Name Photo Function introduction It main effect is to eliminate the interference of power for Filter plate protecting unit’s anti-interference capability and prevent the interference to other electric appliances. There are three complemental IGBT tube inside the IPM module.

  • Page 72: Removal Of Parts

    DC Inverter Multi VRF System II Service Manual 5 Removal of Parts 5.1 Key parts Photo Name Function Core part of air conditioning system. It sucks low temperature and low pressure gas, compress it to compressor high temperature and high pressure gas, and then discharge it.
  • Page 73 DC Inverter Multi VRF System II Service Manual It used for connecting indoor unit and outdoor unit, and Cut-off valve used for maintenance and installation. 5.2 Removal of key parts 5.2.1GMV-120WL/A-T, GMV-140WL/A-T, GMV-160WL/A-T series unit Removal operation for panel Remark: Before removing the panel, please make sure that the unit is disconected with the power Process Photo Operation Instruction...
  • Page 74 DC Inverter Multi VRF System II Service Manual Removal operation for blade Remark: Before removing the motor, please make sure that the unit is disconnected with the power. Process Photo Operation Instruction ● Loose screws fixing the panel with screwdriver 1.
  • Page 75 DC Inverter Multi VRF System II Service Manual 5. Assemble ● Assemble the unit in the the converse sequence unit Removal operation of compressor Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected.
  • Page 76 DC Inverter Multi VRF System II Service Manual 5. Fix the new After replacing the compresor, fix the nuts at the compressor at the bottom of compressor chassis 6. Connect suction ● Weld the connection pipe of compressor, pipe and discharge connect the pipeline and compressor pipe of copressor Note: During welding process, do not let flame...
  • Page 77 DC Inverter Multi VRF System II Service Manual 2. Disconnect ● Weld those 4 connection spots on the 4-way valve 4-way valve, and then pull out the and connection connection pipe pipeline Note: During welding process, do not let the flae burn out other parts ●...
  • Page 78 DC Inverter Multi VRF System II Service Manual Remival operation for eletronic expansion valve Remark: Before removing the electronic expansion valve, please make sure that there’s no refrigerant in th pipeline of system and the power is disconnected Process Photo Operation Instruction ●...
  • Page 79 DC Inverter Multi VRF System II Service Manual Removal operation of gas liquid separator Remark: Before removing the gas liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and disconnect the power Process Photo Operation Instruction 1.

  • Page 80: Common Maintenance

    DC Inverter Multi VRF System II Service Manual ● Weld those 4 connection spots on 2. Disconnect the plate heat exchanger, and then inlet pipe and pull out the connection pipe. outlet pipe Note: During welding process, do not of plate heat let flame burn out other parts exchanger 3.
  • Page 81 DC Inverter Multi VRF System II Service Manual that the pressure of governing valve hasn’t been increased. a .Vacuum pump for the gas pipe and liquid valve at the same time; Pressure gauge connector valve Connector on gas side liquid Refrigerant cylinder Connector on liquid side Spring balance...
  • Page 82 DC Inverter Multi VRF System II Service Manual Length Length of liquid pipe: φ9.52:A+B+C+a=20+10+5+10=45m φ6.35:D+b+c+d=5+10+10+10=35m L= (9.52 length of liquid pipe)×1+(6.4 length of liquid pipe) ×0.4 = 45×1+35×0.4=59m LA=L-50=59-50=9 m R=LA×54 =9×54=486 g Additional volume of refrigerant R=LA×54 =9×54=486 g b.Operation procedure for adding refrigerant b1.Put the charging tank on the weightometer, record the reading and then calculate the data after charging refrigerant;...

  • Page 83: Exploded View Of Unit And Parts' List

    DC Inverter Multi VRF System II Service Manual Note: Before airtightness test, all welding lines can’t be insulated and bundled. 7 Exploded View of Unit and Parts’ List 7.1 Exploed view for outdoor unit and parts’ list 1) Model: GMV-120WL/A-T,GMV-140WL/A-T,GMV-160WL/A-T Exploded view: 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42...
  • Page 84 DC Inverter Multi VRF System II Service Manual Left Side Plate 01314100013P Clapboard Sub-Assy 01244100006 Fan Motor 15704115 Sensor Sub-Assy 39008000061G Fan Motor 1570411501 Front Grill 26904100026 Cabinet 01514100002P Front Side Plate 01314100012P Handle 26235253 Front Connection Board 01344100002P Diversion Circle 10474100001 Axial Flow Fan 10434100003...
  • Page 85 DC Inverter Multi VRF System II Service Manual Magnet Coil 4300040045 Nozzle for Adding Freon 06120012 Condenser Assy 01124100108 Rear Grill 01574100004...
  • Page 86 JF00302323...

This manual is also suitable for:

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