Gree GMV-144WM/B-U Owner's Manual
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Gree GMV-144WM/B-U Owner's Manual

Gree GMV-144WM/B-U Owner's Manual

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Owner's Manual
Original Instructions
Commercial Air Conditioners
GMV DC Inverter VRF
Models:
GMV-72WM/B-U(U)
GMV-96WM/B-U(U)
GMV-120WM/B-U(U)
......
GMV-360WM/B-U(U)

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Summary of Contents for Gree GMV-144WM/B-U

  • Page 1 Owner's Manual Original Instructions Commercial Air Conditioners GMV DC Inverter VRF Models: GMV-72WM/B-U(U) GMV-96WM/B-U(U) GMV-120WM/B-U(U) …… GMV-360WM/B-U(U)
  • Page 2 Preface Gree DC Inverter Multi VRF System, with the most advanced technologies in the world, uses eco-friendly refrigerant R410A as its cooling medium. For correct installation and operation, please read this manual carefully. This is the safety alert symbol. It is used to alert you to potential personal injury hazards.

  • Page 3: Table Of Contents

    Contents 1 Safety Precautions ......................1 2 Product Introduction ......................2 2.1 Names of Main Parts ......................2 2.2 Combinations of Outdoor Units ....................3 2.3 Combinations of Indoor and Outdoor Units ................3 2.4 The Range of Production Working Temperature ..............4 3 Preparation before Installation ..................

  • Page 4: Safety Precautions

    (19) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please contact Gree appointed service center for help. (20) Before installation, please check if the power supply is in accordance with the requirements specified on the nameplate.

  • Page 5: Product Introduction

    (27) If anything abnormal happens (such as burning smell), please power off the unit and cut off the m ain power supply, and then immediately contact Gree appointed service center. If abnormality keeps going, the unit might be damaged and lead to electric shock or fire.

  • Page 6: Combinations Of Outdoor Units

    GMV DC Inverter VRF 2.2 Combinations of Outdoor Units Model GMV-144WM/B-U(U) GMV-168WM/B-U(U) GMV-192WM/B-U(U) (Single) Model GMV-72WM/B-U(U) GMV-72WM/B-U(U) GMV-96WM/B-U(U) (Combined) + GMV-72WM/B-U(U) + GMV-96WM/B-U(U) + GMV-96WM/B-U(U) Model GMV-216WM/B-U(U) GMV-240WM/B-U(U) GMV-264WM/B-U(U) (Single) GMV-72WM/B-U(U) Model GMV-96WM/B-U(U) GMV-120WM/B-U(U) + GMV-96WM/B-U(U) (Combined) + GMV-120WM/B-U(U) + GMV-120WM/B-U(U)

  • Page 7: The Range Of Production Working Temperature

    GMV DC Inverter VRF Fig.2.3 Fig.2.3 is the combination view of the ODU of Modular DC Inverter Multi VRF System and the IDU of Multi VRF System. IDU can be cassette type, one-way cassette type, wall-mounted type, duct type, etc. When any one IDU receives operation signal, ODU will start to work according to the capacity;...

  • Page 8: Preparation Before Installation

    GMV DC Inverter VRF 3 Preparation before Installation NOTICE! The picture is only used for reference and the actual product prevails. Unit: mm(in.). 3.1 Standard Parts Please use the following standard parts supplied by Gree. Parts for Outdoor Unit Number Name Picture...
  • Page 9 GMV DC Inverter VRF 3.2.1 When the outdoor unit is totally surrounded by walls, please refer to following figures for space dimension. 3.2.1.1 Space dimension for single-module unit Unit: mm(in.) Fig.3.2.1 3.2.1.2 Space dimension for dual-module unit Unit: mm(in.) Fig.3.2.2...
  • Page 10 GMV DC Inverter VRF 3.2.1.3 Space dimension for three-module unit Unit: mm(in.) Fig.3.2.3 3.2.2 When there is wall (or similar obstruction) above the unit, keep the distance between the unit top and the wall at least 3000mm(118-1/8in.) or above. When the unit is located in a totally open space with no obstructions in four directions, keep the distance between the unit top and wall at least 1500mm(59in.) or above (See Fig.3.2.4).
  • Page 11 GMV DC Inverter VRF Unit: mm(in.) Fig.3.2.4 Fig.3.2.5 3.2.3 Space dimension for multiple-module unit For keeping good ventilation, make sure there is no obstruction above the unit. When the unit is located at a half-open space (front and left/right side is open), install the unit as per the same or opposite direction.
  • Page 12 GMV DC Inverter VRF 3.2.4 Considering the seasonal wind in outdoor unit installation Anti-monsoon installation requirement for unit not connecting exhaust duct Fig.3.2.8 Fig.3.2.9 Anti-monsoon installation requirement for unit connecting exhaust duct Fig.3.2.10...

  • Page 13: Piping Work Requirements

    GMV DC Inverter VRF 3.2.5 Considering snow in outdoor unit installation Fig.3.2.11 3.3 Piping Work Requirements There should be no fall among outdoor modules. Refer to the table below for piping work requirements. R410A Refrigerant System Outer Diameter mm(in.) Wall Thickness mm(in.) Type Φ6.35(1/4) ≥0.8(1/32)

  • Page 14: Installation Instruction

    GMV DC Inverter VRF 4 Installation Instruction 4.1 Physical Dimension of the Outdoor Unit and Mounting Hole Outline and Physical Dimention of GMV-72WM/B-U(U). Unit: mm(in.) Fig.4.1.1...
  • Page 15 GMV DC Inverter VRF Outline and Physical Dimention of GMV-96WM/B-U(U) and GMV-120WM/B-U(U). Unit: mm(in.) Fig.4.1.2...

  • Page 16: Connection Pipe

    GMV DC Inverter VRF 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.4.2.1...
  • Page 17 GMV DC Inverter VRF 4.2.2 Schematic Diagram of Piping Sequence GMV-72WM/B-U(U) Fig.4.2.2 GMV-96WM/B-U(U) and GMV-120WM/B-U(U). Fig.4.2.3...
  • Page 18 GMV DC Inverter VRF 4.2.3 Allowable pipe length and drop height among indoor and outdoor units Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in the figure below. Remark: Equivalent length of one Y-type manifold is about 0.5m(1-3/4ft.). Unit: m(ft.) Fig.4.2.4 L10: Length from the first branch to the farthest IDU;...
  • Page 19 No need to enlarge pipe size No need to enlarge pipe size Φ12.7(1/2) GMV-96WM/B-U(U) No need to enlarge pipe size Φ15.9(5/8) GMV-120WM/B-U(U) No need to enlarge pipe size Φ34.9(1-3/8) Φ15.9(5/8) GMV-144WM/B-U(U) Φ34.9(1-3/8) Φ19.05(3/4) GMV-168WM/B-U(U) Φ34.9(1-3/8) Φ19.05(3/4) GMV-192WM/B-U(U) Φ34.9(1-3/8) Φ19.05(3/4) GMV-216WM/B-U(U) Φ19.05(3/4)
  • Page 20 GMV DC Inverter VRF 4.2.4 Connection Pipe among Outdoor Modules Fig.4.2.5 Unit: m(ft.) Fig.4.2.6 NOTICE! When the distance between outdoor units exceeds 2m(6-1/2ft.), U-type oil trap should be added at low pressure gas pipe. a+c≤10m(32-7/8ft.);b+c≤10m(32-7/8ft.);d≤10m (32-7/8ft.).
  • Page 21 GMV DC Inverter VRF 4.2.5 Fitting pipe between Outdoor Unit and the First Manifold 4.2.5.1 For single module system, pipe size (between outdoor unit and the first manifold) is determined by that of outdoor unit. Fig.4.2.7 Pipe size of basic outdoor module is shown as follows: Pipe between ODU and the first branch of IDU Basic Module Gas Pipe mm(in.)
  • Page 22 GMV DC Inverter VRF Pipe between module and branch of ODU Basic Module Gas Pipe mm(in.) Liquid Pipe mm(in.) Φ19.05(3/4) Φ9.52(3/8) GMV-72WM/B-U(U) Φ22.2(7/8) Φ9.52(3/8) GMV-96WM/B-U(U) Φ28.6(1-1/8) Φ12.7(1/2) GMV-120WM/B-U(U) Select the branch of outdoor module Model Select the branch of outdoor module ML01/A 4.2.5.3 Fitting pipe between two manifolds from basic modules Pipe size (between two manifolds from basic modules) is based on the total capacity of...
  • Page 23 Fig.4.2.11 Total rated capacity of outdoor Pipe between ODU and the first branch of IDU modules (multi-modular system) Gas pipe size mm(in.) Liquid pipe size mm(in.) Φ28.6(1-1/8) Φ12.7(1/2) GMV-144WM/B-U(U) Φ28.6(1-1/8) Φ15.9(5/8) GMV-168WM/B-U(U) Φ28.6(1-1/8) Φ15.9(5/8) GMV-192WM/B-U(U) Φ28.6(1-1/8) Φ15.9(5/8) GMV-216WM/B-U(U) Ф34.9(1-3/8)
  • Page 24 GMV DC Inverter VRF Ф34.9(1-3/8) Ф19.05(3/4) GMV-264WM/B-U(U) Ф34.9(1-3/8) Ф19.05(3/4) GMV-288WM/B-U(U) Ф34.9(1-3/8) Ф19.05(3/4) GMV-312WM/B-U(U) Ф34.9(1-3/8) Ф19.05(3/4) GMV-336WM/B-U(U) Ф41.3(1-5/8) Ф19.05(3/4) GMV-360WM/B-U(U) 4.2.5.5 Manifold at indoor unit side Manifold at indoor unit side can be selected as per total capacity of downstream indoor unit(s).
  • Page 25 GMV DC Inverter VRF 4.2.5.6 Fitting pipe between manifolds Pipe size (between two manifolds at indoor unit side) is based on the total capacity of upstream indoor unit(s). Fig.4.2.13 Dimension of the pipe of indoor branch Total capacity of downstream indoor unit(s) C(Btu/h) Gas Pipe mm(in.) Liquid Pipe mm(in.)

  • Page 26: Installation Of The Connection Pipe

    GMV DC Inverter VRF Pipe between indoor branch and IDU Rated capacity of indoor unit C(Btu/h) Gas Pipe mm(in.) Liquid Pipe mm(in.) Φ9.52(3/8) Φ6.35(1/4) C≤9500 Φ12.7(1/2) Φ6.35(1/4) 9500＜C≤17100 Φ15.9(5/8) Φ9.52(3/8) 17100＜C≤48500 Φ19.05(3/4) Φ9.52(3/8) 48500＜C≤72000 Φ22.2(7/8) Φ9.52(3/8) 72000＜C 4.3 Installation of the Connection Pipe 4.3.1 Precautions when installing the connection pipe NOTICE！...
  • Page 27 GMV DC Inverter VRF 2) Tighten the flare nuts with torque wrench until you hear "click" sound. 3) Use sponge to wrap the connecting pipe and joints without thermal insulation and tie it up with plastic tape. 4) A mounting support for the connection pipe is required. 5) The curvature degree of connection pipe should not be small, otherwise the pipe might crack.
  • Page 28 GMV DC Inverter VRF (3) Y-type manifold can be installed vertically or horizontally. Confirm the position and then weld the manifold pipe. See the Fig. 4.3.4(a). T-type manifold must be installed horizontally with inclination, see the Fig. 4.3.4(b). Fig. 4.3.4(a) Fig.
  • Page 29 GMV DC Inverter VRF Unit: mm(in.) Fig.4.3.5 (3) There must be three fixing point for both horizontal and vertical installation of the Y-type manifold. See Fig.4.3.6. Fixing point 1: 100mm(4in) on the main inlet manifold from the welding point Fixing point 2: 200mm(7-7/8in.) on the main branched pipe from the welding point Fixing point 3: 250mm(9-5/6in.) on the branched pipe from the welding point Unit: mm(in.) Fig.4.3.6...
  • Page 30 GMV DC Inverter VRF Fig. 4.3.7 (5) Thermal insulation for pipeline 1) To avoid condensate or water leakage on connecting pipe, the gas pipe and liquid pipe must be wrapped with thermal insulating material and adhesive pipe for insulation from the air. 2) For heat pump unit, liquid pipe should bear 70ºC(158℉) or above, and gas pipe should bear 120ºC(248℉) or above.

  • Page 31: Air Purging And Refrigerant Charge

    GMV DC Inverter VRF Fig.4.3.8 4) Manifold attached foam can not be taken as insulating material. 5) When wrapping the tape, the later circle should cover half of the former one. Don’t wrap the tape so tightly, otherwise the insulation effect will be weakened. 6) After wrapping the pipe, adopt sealing material to completely fill the hole so as to prevent wind and rain from entering the room.
  • Page 32 GMV DC Inverter VRF 4.4.2 Additional refrigerant charging Outdoor unit has been charged refrigerant before delivery. Charge additional refrigerant for field-installed connecting pipe. If the pipeline is longer than 1m(39-3/8in.), please refer to the following table for charging amount of refrigerant. (Liquid pipe prevails) How much additional refrigerant should be charged.
  • Page 33 GMV DC Inverter VRF For example1: The OUD is composed of 3 modules: 72kBtu/h, 120 kBtu/h and 120 kBtu/h. The IDUs are made up of 7sets of 48 kBtu/h. IDU/ODU rated capacity collocation ratio C= 48×7/(72+120+120)=108%.The quantity of included IDUs is more than 4 sets. Please refer to the above table. Refrigerant charging amount B for 72kBtu/h module is 4.0kg(8.8pounds).

  • Page 34: Electric Wiring

    GMV DC Inverter VRF kg/m The maximum amount of refrigerant (kg) in the system = The volume of the room (m ) ×The maximum allowed concentration level of refrigerant (kg/m Total amount of refrigerant (kg) in the system = Total additional charging amount (kg) + Amount of refrigerant (kg) which is charged before leaving the factory (for the system consisting of multiple modules in parallel, the accumulative charge quantity of modules before leaving the factory is used)
  • Page 35 Power Supply Fuse Capacity Ampacity Protection Outdoor units V/ Ph /Hz GMV-72WM/B-U(U) 460V 3~ 60Hz GMV-96WM/B-U(U) 460V 3~ 60Hz GMV-120WM/B-U(U) 460V 3~ 60Hz GMV-144WM/B-U(U) 460V 3~ 60Hz 20+20 15+15 20+20 GMV-168WM/B-U(U) 460V 3~ 60Hz 20+25 15+18 20+25 GMV-192WM/B-U(U) 460V 3~ 60Hz...
  • Page 36 GMV DC Inverter VRF (1) Specification of circuit breaker and power cord is selected on the basis of unit’s maximum power (max. current). (2) Specification of power cord is based on the working condition where ambient temperature is 40 ºC (104 ℉) and multi-core cable with copper conductor(working temperature is 90 ºC (194℉), e.g.

  • Page 37: System Communication

    GMV DC Inverter VRF 4.6 System Communication 4.6.1 Communication system include: (1) Communication among outdoor basic modules. (2) Communication between ODU and IDU. (3) Communication among IDUs. (4) Communication between IDU and wired controller. (5) Connection between IDU and light board receiver. (6) Communication between different refrigeration systems.
  • Page 38 GMV DC Inverter VRF 4.6.3 Selection and connection mode of GMV5 communication material 4.6.3.1Select communication material NOTICE! If air conditioners are installed at places where there’s strong electromagnetic interference, the communication wire of IDU and wired controller must use shielded wire and the communication wire between IDU and IDU/ODU must use shielded twisted pair.
  • Page 39 GMV DC Inverter VRF NOTICE! All of the selected communication wire must be consistent with local laws and regulations. 4.6.3.2 Connection mode of communication (1) All communication wires of GMV5 must be connected in series rather than in star. Fig.4.6.4 Fig.4.6.5...
  • Page 40 GMV DC Inverter VRF Fig.4.6.6 (2) All communication wires of GMV5 are connected by screws. Fig.4.6.7 (3) If a single communication wire is not long enough and needs to be connected, the connected joint must be welded or pressure-welded. Do not simply twist the wires together. 4.6.4 Communication address Auto addressing technology is adopted for GMV5 IDU and ODU.

  • Page 41: Connection Method And Steps For System Communication

    GMV DC Inverter VRF 4.7 Connection Method and Steps for System Communication 4.7.1 Communication connection between IDU and ODU NOTICE! The centralized controller can be installed when it is necessary. Connect IDU and ODU via terminal D1/D2 of wiring board XT2. Below are the connection graphics of single unit and modular units: Fig.4.7.1 Connection of single unit...
  • Page 42 GMV DC Inverter VRF Fig.4.7.2 Connection of modular unit (1) For modular outdoor units, if there are multiple outdoor modules, then the master unit must be the first outdoor module on the communication wire and should not connect with IDU (ma ster unit is set by SA8 of the outdoor main board).
  • Page 43 GMV DC Inverter VRF 4.7.2 Communication connection between IDU and wired controller There are 4 kinds of connection between IDU and wired controller, as shown below: Fig.4.7.3 One wired controller controls one IDU Fig.4.7.4 Two wired controllers controls one Fig.4.7.5 One wired controller controls multiple IDUs...
  • Page 44 GMV DC Inverter VRF Fig.4.7.6 Two wired controllers control multiple IDUs When two wired controllers control multiple IDUs, the wired controller can be connected to any one IDU, provided that the connected IDU is of the same series. Meanwhile, one and only one of the wired controllers must be set as a slave controller.
  • Page 45 GMV DC Inverter VRF Fig.4.7.7 (1) Wired controller and light board remote receiver can be used at the same time. (2) When light board remote receiver is used, please use remote controller at the same time. 4.7.4 Communication connection of central controlling units NOTICE! The centralized controller can be installed when it is necessary.
  • Page 46 GMV DC Inverter VRF Fig.4.7.8...

  • Page 47: External Electrical Wiring Diagram

    GMV DC Inverter VRF 4.8 External Electrical Wiring Diagram (1) Every unit should be equipped with a circuit breaker for short-circuit and overload protection. In general, circuit breaker is at OFF status. (2) During operation, all indoor units and outdoor units belonging to the same system must be kept energized status.
  • Page 48 GMV DC Inverter VRF 4.8.2 External wiring diagram of modular connection Fig.4.8.2 NOTICE! Maximum number of ODU (N) and maximum number of IDU (n) are based upon the combination type of ODU. For details, please refer to the introduction of units’ combination.

  • Page 49: Check Items After Installation And Trial Run

    GMV DC Inverter VRF 5 Check Items after Installation and Trial Run 5.1 Check Items after Installation Check Items Conditions Might Happen Check Has the unit been fixed firmly? The unit may drop, shake or emit noise. It may cause insufficient cooling/heating Have you done the gas leakage test? capacity.
  • Page 50 GMV DC Inverter VRF (3) All the objects like metal filing, thrum and clip should be cleared after installation. (4) Check if the unit appearance and piping system is damaged or not due to transportation. (5) Check if the terminals of electrical element is loose and the phase sequence is correct or not.
  • Page 51 GMV DC Inverter VRF Fig.5.2.2 (5) Before debugging, make sure the needed amount of refrigerant has been added to the pipe or at least 70% of the needed refrigerant has been added. (6) Description of each stage of debugging progress: Description of each stage of debugging progress ——...
  • Page 52 GMV DC Inverter VRF LED3 displays the quantity of IDUs. light light 01~80 blink Confirm the number manually. 04_Confirm the quantity of IDUs System has confirmed the quantity of light light light IDUs. Start next progress. System detects “driven communication light light light...
  • Page 53 GMV DC Inverter VRF Calculate the refrigerant quantity 11_Calculate manually and confirm the perfusion refrigerant light light light status of refrigerant (the quantity of quantity refrigerant added into the system must manually be recorded accurately). light light blink Ready for units to start debugging. 12_Confirm debugging Manual calculation of refrigerant...
  • Page 54 GMV DC Inverter VRF 5.2.2.2 Debugging operation mode GMV5 multi VRF system has two debugging modes: one is direct operation on main board of outdoor units while the other is PC operation via special software. In PC software debugging, indoor/outdoor parameters can be displayed and historical data can be recorded and inquired. (Operation details can be found in relevant instruction manuals) (1)Debugging through operation on main board of outdoor units In this debugging mode, following debugging functions are included on the main board:...
  • Page 55 GMV DC Inverter VRF start next progress. Step 7: in progress 03, the quantity of modules needs to be confirmed manually. Main board of each module will display: Debugging code Progress code Status code LED1 LED2 LED3 Progress Display Display Display Code Code...
  • Page 56 GMV DC Inverter VRF —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status 05_Detect Detection is finished. Start next internal Light Light Light progress. communication If error is detected, system will stay at current progress. Error has to be solved manually. Below are relevant errors: ——...
  • Page 57 GMV DC Inverter VRF components Elimination methods of above error can be found in Troubleshooting. Step11: progress 07 is “Detect indoor components” If no error is detected, system will display as below and then start next progress. —— Debugging code Progress code Status code LED1 LED2...
  • Page 58 GMV DC Inverter VRF —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status 08_Confirm Preheat time for compressor is less preheated Light Light Light than 8h. compressor Step 13: progress 09 is “Refrigerant judgments before startup” If the refrigerant quantity inside the system meets the requirement of operation startup, system will display as below and start next progress.
  • Page 59 GMV DC Inverter VRF LED1 LED2 LED3 progress Display Display Display Code code Code status status status 10_Status judgments of Light Light Light Outdoor valves are not fully turned on. outdoor valves before startup Then check the big and small valves whether they are fully turned on. After the check, press SW6 return button to restart the judgments.
  • Page 60 GMV DC Inverter VRF Step 17: after unit is confirmed to start debugging, system select cooling/heating mode according to ambient temperature. A If cooling mode is selected, relevant display is as below: —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning...
  • Page 61 GMV DC Inverter VRF —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning progress Display Display Display Code code Code status status status Debugging is finished. System is on 17_Debugging standby condition. LED1 displays Light Light Light finished module address.
  • Page 62 GMV DC Inverter VRF ● When ambient temp is -5~10º C(23~50° F), system’s low pressure value in heating mode is -15~5º C(5~41° F). ● In cooling mode, heating electronic expansion valve remains 480PLS. Opening angle of ● In heating mode, the opening angle of adjustable heating EXV electronic expansion valve varies within 120~480PLS.

  • Page 63: Common Malfunction And Troubleshooting

    Otherwise, there will be collision malfunction of the project codes. For detail operation me thods, please refer to the GMV5 Installation and Maintenance Manual. (2) If problem cannot be solved after checking the above items, please contact Gree service center and show phenomena and models.
  • Page 64 GMV DC Inverter VRF Following circumstance are not malfunction. “Malfunction” Reason When unit is started immediately after it is just Overload protection switch makes it run turned off after 3 minutes delay Unit doesn’t run When power is turned on Standby operating for about 1 minute Mist comes from Under cooling...

  • Page 65: Error Indication

    GMV DC Inverter VRF 7 Error Indication Inquiry method of malfunction display: combine division number and content number to check the corresponding malfunction. Indoor: Error Code Content Error Code Content Malfunction of lower water Malfunction of IDU temperature sensor of water tank Malfunction of ambient temperature Protection of indoor fan sensor...
  • Page 66 GMV DC Inverter VRF Outdoor: Error Code Content Error Code Content Current sensor of compressor 1 is Malfunction of ODU abnormal Current sensor of compressor 2 is High-pressure protection abnormal Discharge low-temperature Current sensor of compressor 3 is protection abnormal Current sensor of compressor 4 is Low-pressure protection abnormal...
  • Page 67 GMV DC Inverter VRF High-pressure sensor and Drive PFC protection of compressor low-pressure sensor are connected reversely Over-current protection of inverter Malfunction of temperature sensor of compressor oil-return 2 Drive IPM module protection of Malfunction of temperature sensor of compressor oil return 3 Malfunction of drive temperature Malfunction of temperature sensor of...
  • Page 68 GMV DC Inverter VRF Debugging: Error Code Content Error Code Content Preheat time of compressor is Alarm because ODU quantity is insufficient inconsistent Wrong setting of ODU’s capacity Abnormal communication of code/jumper cap converter Power supply phase sequence Emergency status of compressor protection Refrigerant-lacking protection Emergency status of fan...
  • Page 69 GMV DC Inverter VRF Status: Error Code Content Error Code Content Unit waiting for debugging Shielding status Refrigerant recovery operation of SE operation setting of system after-sales Defrosting Compulsory defrosting Limit setting for max. capacity/output Oil-return capacity Compulsory excursion of Heat pump function setting engineering code of IDU Quiet mode setting...

  • Page 70: Maintenance And Care

    (4) In the event of rusting, use the anti-rust paint to stop spreading of rust. 8.5 Parts Replacement Purchase parts from Gree appointed service center or dealer if necessary. NOTICE! During airtight and leakage test, never mix oxygen, ethyne and other dangerous gas into refrigeration circuit.

  • Page 71: After-Sales Service

    Gree. Warranty should meet the following requirements: (1) First run of the unit should be operated by professional personnel from Gree appointed service center. (2) Only Gree manufactured accessories can be used on the machine.

This manual is also suitable for:

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