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Heat Recovery DC Inverter Multi
VRF Unit
Owner's Manual
Air Conditioners
Models:
GMV-Q224WM/B-X
GMV-Q280WM/B-X
GMV-Q335WM/B-X
GMV-Q400WM/B-X
GMV-Q450WM/B-X
GMV-Q504WM/B-X
...
GMV-Q1800WM/B-X
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Table of Contents
Related Manuals for Gree GMV-Q224WM/B-X
Summary of Contents for Gree GMV-Q224WM/B-X
- Page 1 GREE reserves the right to interpret this manual which will be subject to any change due to product improvement without further notice. GREE Electric Appliances, Inc. of Zhuhai reserves the final right to interpret this manual.
- 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. Before reading the manual, please note that: (1) To ensure safety when operating the units, please strictly follow the instructions in this manual.
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Page 3: Table Of Contents
Contents 1 SAFETY PRECAUTIONS ........................... 1 2 PRODUCT INTRODUCTION ..........................3 2.1 N ..........................3 AMES OF ARTS ......................3 2.2 C OMBINATIONS OF UTDOOR NITS ..................4 2.3 C OMBINATIONS OF NDOOR AND UTDOOR NITS ............................6 2.4 O PERATION ANGE 3 PREPARATION BEFORE INSTALLATION .................... -
Page 4: Safety Precautions
Heat Recovery DC Inverter Multi VRF Unit 1 Safety Precautions means items that must be forbidden! Otherwise, it may lead to personal injury or death or serious damage. means items that must be followed! Otherwise, it may lead to personal injury or property loss. Installation should be Please install the unit performed by distributor or... - Page 5 Gree Electric Appliances, Inc. of Zhuhai will not assume responsibility for any personal injury or property loss caused by improper installation, improper test running, and unnecessary repair or not following the instructions of this manual.
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Page 6: Product Introduction
Heat Recovery DC Inverter Multi VRF Unit 2 Product Introduction Gree Modular Heat Recovery Multi VRF System adopts inverter compressor technology. By changing the displacement of compressor, stepless capacity regulation can be realized . Various product lineups are provided with capacity range from 22.4kW to 180kW, and indoor units within a same system can operate in cooling or heating mode in the meantime. -
Page 7: Combinations Of Indoor And Outdoor Units
+ GMV-Q450WM/B-X + GMV-Q450WM/B-X 2.3 Combinations of Indoor and Outdoor Units (1) See below the number of indoor units that can be connected to an outdoor unit. Model of ODU Max number of connectable IDUs GMV-Q224WM/B-X GMV-Q280WM/B-X GMV-Q335WM/B-X GMV-Q400WM/B-X GMV-Q450WM/B-X GMV-Q504WM/B-X... - Page 8 Heat Recovery DC Inverter Multi VRF Unit GMV-Q1130WM/B-X GMV-Q1180WM/B-X GMV-Q1235WM/B-X GMV-Q1300WM/B-X GMV-Q1350WM/B-X GMV-Q1410WM/B-X GMV-Q1460WM/B-X GMV-Q1515WM/B-X GMV-Q1580WM/B-X GMV-Q1630WM/B-X GMV-Q1685WM/B-X GMV-Q1750WM/B-X GMV-Q1800WM/B-X (2) The total capacity of indoor units should be within 50%~135% of that of the outdoor unit. Figure 2 (3) Outdoor units of Modular DC Inverter Heat Recovery System can be connected to multi VRF indoor units, including cassette type unit, one-way cassette type unit, wall-mounted unit and duct type unit, as shown in figure 2.
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Page 9: Operation Range
Heat Recovery DC Inverter Multi VRF Unit 2.4 Operation Range Outdoor temperature -5℃～50℃ Cooling operation Heating operation Outdoor temperature -20℃～24℃ Outdoor temperature -10℃～20℃ Heat recovery operation 3 Preparation before Installation Note: Graphics here are only for reference. Please refer to actual products. Unspecified dimensions are all in mm. - Page 10 Heat Recovery DC Inverter Multi VRF Unit 3.2.1 If the ODU is totally surrounded by walls, please refer to the following figures for space dimension: 3.2.1.1 Installation space requirement for a single module Unit: mm Figure 3 3.2.1.2 Installation space requirement for twin modules Unit: mm Figure 4 3.2.1.3 Installation space requirement for three modules...
- Page 11 Heat Recovery DC Inverter Multi VRF Unit 3.2.1.4 Installation space requirement for four modules Unit: mm Figure 6 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 or above. When the unit is located in an open space with no obstruction from front, back, left and right, keep the distance between the unit top and wall at least 1500mm or above (See Fig.7).
- Page 12 Heat Recovery DC Inverter Multi VRF Unit 3.2.3 Installation space requirement for multiple outdoor units In order to keep good ventilation, make sure there is no obstruction above the units. When units are located in a semi-open space (front and left/right sides are open), install units as per the same or opposite direction.
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Page 13: Connection Pipe Requirement
Heat Recovery DC Inverter Multi VRF Unit 3.2.5 Take snow into considertaion when installation outdoor units Figure 12 3.3 Connection Pipe Requirement Refer to the table below for connection pipe requirement: R410A Refrigeratn System Outer diameter (mm/inch) Wall thickness (mm) Type Φ6.35(1/4) ≥0.8... -
Page 14: Installation Instructions
Note: Graphics here are only for reference. Please refer to actual products. Unspecified dimensions are all in mm. 4.1 Dimension of Outdoor Unit and Mounting Hole Outline and installation dimension of GMV-Q224WM/B-X, GMV-Q280WM/B-X Unit: mm Figure 13 Outline and installation dimension of GMV-Q335WM/B-X, GMV-Q400WM/B-X, GMV-Q450WM/B-X... -
Page 15: Refrigerant Connection Pipe Of Indoor And Outdoor Units
Heat Recovery DC Inverter Multi VRF Unit 4.2 Refrigerant Connection Pipe of Indoor and Outdoor Units 4.2.1 Schematic diagram of piping connection Figure 15 4.2.2 Schematic diagram of piping sequence GMV-Q224WM/B-X, GMV-Q280WM/B-X Figure 16... - Page 16 Heat Recovery DC Inverter Multi VRF Unit GMV-Q335WM/B-X, GMV-Q400WM/B-X, GMV-Q450WM/B-X Figure 17 4.2.3 Allowable pipe length and height difference between indoor and outdoor units Y type branch joint is adopted to connect indoor and outdoor units. Connection method is shown below: Note: Length of one Y-type branch is equivalent to 0.5m.
- Page 17 Outdoor model Diameter of liquid pipe (mm) gas pipe (mm) gas pipe (mm) No need to enlarge pipe No need to enlarge pipe No need to enlarge pipe GMV-Q224WM/B-X diameter diameter diameter No need to enlarge pipe Φ12.7 Φ22.2 GMV-Q280WM/B-X diameter Φ28.6...
- Page 18 Heat Recovery DC Inverter Multi VRF Unit Φ44.5 Φ22.2 Φ34.9 GMV-Q1130WM/B-X Φ44.5 Φ22.2 Φ34.9 GMV-Q1180WM/B-X Φ44.5 Φ22.2 Φ34.9 GMV-Q1235WM/B-X Φ44.5 Φ22.2 Φ34.9 GMV-Q1300WM/B-X Φ44.5 Φ22.2 Φ34.9 GMV-Q1350WM/B-X No need to enlarge pipe Φ25.4 Φ41.3 GMV-Q1410WM/B-X diameter No need to enlarge pipe Φ25.4 Φ41.3 GMV-Q1460WM/B-X...
- Page 19 Heat Recovery DC Inverter Multi VRF Unit Figure 20 A+B ≤10m。 Note: When the distance between outdoor units exceeds 2m, U-type oil trap should be added at low pressure gas pipe. A+B≤10m. 4.2.5 Size requirement for branch pipe and piping (main pipe) 4.2.5.1 Connection sketch map of single-module system Figure 21 Connection sketch map of multi-module system...
- Page 20 Pipe between outdoor unit and the first indoor branch Basic module Low pressure gas pipe High pressure gas pipe Liquid pipe (mm) (mm) (mm) Φ19.05 Φ9.52 Φ15.9 GMV-Q224WM/B-X Φ22.2 Φ9.52 Φ19.05 GMV-Q280WM/B-X Φ25.4 Φ12.7 Φ19.05 GMV-Q335WM/B-X Φ25.4 Φ12.7 Φ22.2...
- Page 21 Size of connection between outdoor unit and the first indoor branch Basic module (single-module system) High pressure gas Low pressure gas pipe (mm) Liquid pipe (mm) pipe (mm) Φ19.05 Φ9.52 Φ15.9 GMV-Q224WM/B-X Φ19.05 Φ22.2 Φ9.52 GMV-Q280WM/B-X Φ25.4 Φ12.7 Φ19.05 GMV-Q335WM/B-X Φ25.4...
- Page 22 Heat Recovery DC Inverter Multi VRF Unit Φ31.8 Ф38.1 Ф19.05 GMV-Q1065WM/B-X Ф38.1 Ф19.05 Φ31.8 GMV-Q1130WM/B-X Ф38.1 Ф19.05 Φ31.8 GMV-Q1180WM/B-X Φ31.8 Ф38.1 Ф19.05 GMV-Q1235WM/B-X Φ31.8 Ф38.1 Ф19.05 GMV-Q1300WM/B-X Ф38.1 Ф19.05 Φ31.8 GMV-Q1350WM/B-X Ф44.5 Ф22.2 Φ38.1 GMV-Q1410WM/B-X Ф44.5 Ф22.2 Φ38.1 GMV-Q1460WM/B-X Φ38.1 Ф44.5 Ф22.2 GMV-Q1515WM/B-X...
- Page 23 Heat Recovery DC Inverter Multi VRF Unit Φ31.8 Φ19.05 Φ28.6 68.0＜X≤96.0 Φ38.1 Φ19.05 Φ31.8 96＜X≤135 Φ44.5 Φ22.2 Φ38.1 135＜X 4.2.5.7 Piping size among downstream branches of heat pump mode exchanger ”a、h” Size of piping between indoor branches Total rated capacity of downsteam indoor units: X (kW) Gas pipe (mm) Liquid pipe (mm)
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Page 24: Installation Of Refrigerant Connection Pipe
Heat Recovery DC Inverter Multi VRF Unit Connecting method is as shown in the picture: 4.2.6.1 Branch selection of indoor unit of mode exchanger (”C1”) capacity of downsteam indoor units: X R410A refrigerant system Model (kW) Y-type branch 14.0＜X≤28.0 FQ01B/A 4.2.6.2 Piping size between mode exchanger and downstream indoor unit (”k”) Size of connection pipe between indoor branch and indoor unit should be consistent with the connection pipe of indoor unit. - Page 25 Heat Recovery DC Inverter Multi VRF Unit process. Rosin joints, weak joints or pin holes are not allowed. （3） When laying the pipe, be careful not to distort it. Radius of bending parts must be over 200mm. Please do not bend or stretch the pipes frequently, otherwise the pipes will become hard. A pipe shall not be bent or stretched for more than 3 times at the same position.
- Page 26 Heat Recovery DC Inverter Multi VRF Unit Figure 25 Total capacity of downstream indoor Y-type branch Model unit(s) (X) X≤200 FQ01A/A 200＜X≤300 FQ01B/A 300＜X≤700 FQ02/A 700＜X≤1350 FQ03/A 1350＜X FQ04/A （4） Branch shall be insulated by insulating material that can bear 120° or even higher temperature. The attached foam of branch cannot be taken as insulating material.
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Page 27: Vacuum Pumping, Refrigerant Adding
Heat Recovery DC Inverter Multi VRF Unit Figure 26 4）Thermal insulating material of branches should be the same as that of the pipeline. The attached foam of branches cannot 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 too tight, otherwise the insulation effect will be weakened. - Page 28 Heat Recovery DC Inverter Multi VRF Unit 4.4.2 Refrigerant adding R (Quantity of added refrigerant) = A (Quantity of refrigerant added to connection pipe) + ∑B (Quantity of refrigerant added to each module) （1）A (Quantity of refrigerant added to connection pipe) is calculated as below: A (Quantity of refrigerant added to connection pipe) = ∑...
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Page 29: Electric Wiring
Heat Recovery DC Inverter Multi VRF Unit indoor unit: GMV-NX450P/A(X4.0)-M. In this case, the quantity (B) of refrigerant added to this module is 0kg. So, ∑B (Quantity of refrigerant added to each module) = 0kg Suppose that A (Quantity of refrigerant added to connection pipe) = ∑ Length of liquid pipe x Quantity of refrigerant added to liquid pipe per meter) = 5kg R (Quantity of added refrigerant in total) = 5+0=5kg 4.5 Electric Wiring... - Page 30 0Power capacity for conducting wire Model Combination capacity in of ground wire spec. combined units (sectional area total (A) (mm² ) mm² ×pc) 380～415V GMV-Q224WM/B GMV-Q224WM/B-X 3N～ 2.5×5 50/60Hz 380～415V GMV-Q280WM/B 3N～ GMV-Q280WM/B-X 4.0×5 50/60Hz 380～415V GMV-Q335WM/B GMV-Q335WM/B-X 3N～ 4.0×5 50/60Hz 380～415V...
- Page 31 Heat Recovery DC Inverter Multi VRF Unit 380～415V GMV-Q400WM/B-X GMV-Q850WM/B 3N～ 40 + 40 6.0 + 6.0 6.0×5 + 6.0×5 GMV-Q450WM/B-X 50/60Hz 380～415V GMV-Q450WM/B-X GMV-Q900WM/B 3N～ 40 + 40 6.0 + 6.0 6.0×5 + 6.0×5 GMV-Q450WM/B-X 50/60Hz GMV-Q280WM/B-X 380～415V GMV-Q960WM/B 4.0×5 + 4.0×5 GMV-Q280WM/B-X 3N～...
- Page 32 Heat Recovery DC Inverter Multi VRF Unit GMV-Q280WM/B-X 380～415V GMV-Q335WM/B-X GMV-Q1515WM/ 25 + 32 4.0 + 4.0 4.0×5 + 4.0×5 3N～ + 40 + 40 + 6.0 + 6.0 + 6.0×5 + 6.0×5 GMV-Q450WM/B-X 50/60Hz GMV-Q450WM/B-X GMV-Q280WM/B-X 380～415V GMV-Q400WM/B-X GMV-Q1580WM/ 25 + 40 4.0 + 6.0 4.0×5 + 6.0×5...
- Page 33 Heat Recovery DC Inverter Multi VRF Unit Breaker capacity and power cord specification for every indoor unit: Capacity of circuit breaker Min. sectional area of Min. sectional area of power Indoor unit ground wire (mm² ) cord (mm² ) Wall mounted type Duct type (heat pump only) Cassette type (heat pump only)
- Page 34 Heat Recovery DC Inverter Multi VRF Unit 4.5.3 Connection of power cord Note: ①.Air conditioner belongs to class I electrical appliance, so it must be securely grounded. ②.Grounding resistance must follow relevant requirements of the sales countries and regions. ③.The yellow-green wire inside the unit is a ground wire, so it shall not be used for other purposes nor shall it be cut.
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Page 35: System Communication Features
Heat Recovery DC Inverter Multi VRF Unit Figure 30 4.6 System Communication Features 4.6.1 Communication system of heat recovery modular DC inverter units includes: （1）Communication among outdoor basic modules; （2）Communication between outdoor unit and mode exchanger; （3）Communication among mode exchangers; （4）Communication between mode exchanger and indoor unit;... - Page 36 Heat Recovery DC Inverter Multi VRF Unit （8）Communication among different refrigerating systems; （9）Communication schematic diagram Figure 31 4.6.2 Communication method of heat recovery modular DC inverter units CAN bus communication method is adopted for communication between indoor and outdoor units and communication among indoor units. 4.6.3 Material selection and connection method for heat recovery communication 4.6.3.1 Material selection Note: If unit is installed in a place with strong electromagnetic interference, shielded wire must be...
- Page 37 Heat Recovery DC Inverter Multi VRF Unit Total length of communication wire Wire diameter Type of wire between indoor unit Material standard Remarks and wired controller: L(m) 1.Total length of communication wire cannot exceed 250m. 2.The cord shall be circular Light/Ordinary polyvinyl cord(the cores shall be chloride sheathed cord...
- Page 38 Heat Recovery DC Inverter Multi VRF Unit Figure 33 4.6.3.2 Connection of communication wire (1) Communication wires of heat recovery units must be connected in series instead of in star mode; Figure 34...
- Page 39 Heat Recovery DC Inverter Multi VRF Unit Figure 35 Figure 36...
- Page 40 Heat Recovery DC Inverter Multi VRF Unit Figure 37 (2) Connection of communication wires of heat recovery units must be secured with screws. Figure 38 (3) If a communication wire is not long enough and needs to be connected with another wire by peeling away its outer layer, crimp connection or soldering connection must be adopted.
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Page 41: Connection Methods And Procedure Of Communication System
Heat Recovery DC Inverter Multi VRF Unit 4.7 Connection Methods and Procedure of Communication System 4.7.1. Connection of communication between indoor and outdoor units Communication between indoor and outdoor units is connected via terminal D1/D2 on the terminal block XT2. Connection method for single-module and multi-module systems is shown below: Figure 39 Connection of communication for single-module system and single-moudle converter system... - Page 42 Heat Recovery DC Inverter Multi VRF Unit Figure 40 Connection of communication for multi-module system and multi-module converter system...
- Page 43 Heat Recovery DC Inverter Multi VRF Unit Fig 41 Connection of communication for multi-module system and multi-module converter system Note: ① For modular outdoor units, if there are multiple outdoor modules, the master unit must be the first outdoor module on the communication wire and cannot be connected to i ndoor units. (The master unit is set by SA8 on the main board of outdoor unit.) ②For modular outdoor units, if there are multiple outdoor modules, indoor units must be connected to the last outdoor slave module.
- Page 44 Heat Recovery DC Inverter Multi VRF Unit the corresponding connection place of copper pipe for each indoor unit on branch. ⑦ If there’re multiple indoor units at one branch of heat pump mode exchanger, the communication wires of indoor units should adopt series connection. Please note that operation mode for the indoor units at the same brach should be consistent under any circ umstacnes.
- Page 45 Heat Recovery DC Inverter Multi VRF Unit Figure 44 One wired controller controlling multiple indoor units. Note: When one wired controller controls multiple indoor units, those indoor units should be in the same branch of the same heat pump mode exchanger. Figure 45 Two wired controllers controlling multiple indoor units When two wired controllers control multiple indoor units, wired controllers can be connected with any one of the indoor units, which are required to be of the same series.
- Page 46 Heat Recovery DC Inverter Multi VRF Unit Parameter Parameter Default Parameter range Remarks code name value 01： Primary Wired When two wired controllers control one (or more) indoor controller wired controller units, the addresses of the controllers must be different. address Secondary wired controller (address is 02) does not support 02：...
- Page 47 Heat Recovery DC Inverter Multi VRF Unit Figure 47...
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Page 48: Diagram Of External Electric Wiring
Heat Recovery DC Inverter Multi VRF Unit 4.8 Diagram of External Electric Wiring Every unit shall be equipped with circuit breaker for protection against short circuit and overload. A main circuit breaker shall also be set respectively for indoor and outdoor units in order to connect or disconnect power for all the units. - Page 49 Heat Recovery DC Inverter Multi VRF Unit units. For details, please refer to sections of combination of units. 4.8.2 External wiring for modular units Figure 49 Note: The maximum number (N) of connectable outdoor units and the maximum number (n) of connectable indoor units are dependent on the combination way of outdoor units.
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Page 50: Check Items After Installation And Test Operation
Heat Recovery DC Inverter Multi VRF Unit refer to sections of combination of units. Check Items after Installation and Test Operation Check Items after Installation Check items Possible conditions due to improper installation Check Each part of the unit is installed securely? Unit may drop, shake or emit noise Gas leakage test is taken or not? Insufficient cooling (heating) capacity... - Page 51 Heat Recovery DC Inverter Multi VRF Unit 5.2.2 Trial Operation 5.2.2.1 Notices （1）Before trial operation, make sure unit is powered on and the compressor has been preheated for 8h. Touch the unit to check whether it’s normally preheated. If yes, start test operation. Otherwise, compressor might be damaged.
- Page 52 Heat Recovery DC Inverter Multi VRF Unit Description of each stage of debugging progress —— Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status System is not debugged. Master unit hasn’t been set. Please set it. 01_ Set Master unit is two or more than two.
- Page 53 Heat Recovery DC Inverter Multi VRF Unit Preheat time for compressor is less than 8 08_Confirm hours. preheated Compressor has been preheated for 8 hours. compressor Next step will start automatically. System is lack of refrigerant. System stops with 09_Refrigera balance equalizing pressure lower than nt judgments 0.3Mpa.
- Page 54 Heat Recovery DC Inverter Multi VRF Unit unit is in standby status. LED1 displays module address. LED2 and LED3 display “OF”. completion status 5.2.2.2 Debugging operation mode The series has two debugging modes: one is direct operation on main board of outdoor units while the other is PC operation via special software.
- Page 55 Heat Recovery DC Inverter Multi VRF Unit 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 Code Code Display status...
- Page 56 Heat Recovery DC Inverter Multi VRF Unit status status status System detects “driven communication error between master unit inverter compressor”. 05_Detect System detects “driven internal communication error between communicati master unit and inverter fan”. IDU/ODU “high proportion of rated capacity”. IDU/ODU “low proportion of rated capacity”.
- Page 57 Heat Recovery DC Inverter Multi VRF Unit XXXX is the project no. of the faulted IDU. 3s later, relevant error code is displayed. For example, IDU no. 100 has d5 error, then LED3 displays like this: 01 (2s later) 00 (2s later) d5, and repeat again. Elimination methods of above error can be found in Troubleshooting.
- Page 58 Heat Recovery DC Inverter Multi VRF Unit 10_Status judgments of Outdoor valves are being outdoor valves turned on before startup If unit detects that valve status is not normal, it will display as below: Debugging code Progress code Status code LED1 LED2 LED3...
- Page 59 Heat Recovery DC Inverter Multi VRF Unit Display Display Display Code Code Code status status status Debugging for cooling mode. (Debugging operation mode, the system will select automatically with no need of manual setting). Error Malfunction occurs when code debugging for cooling mode. Malfunction of other module occurs when debugging for cooling mode.
- Page 60 Heat Recovery DC Inverter Multi VRF Unit Step 19: after debugging is finished, some functions can be set up according to project’s actual needs. For specific details, please refer to System Functions Setup. If no special requirements, skip this step. Step 20: deliver the product to user and inform user about usage precautions.
- Page 61 Heat Recovery DC Inverter Multi VRF Unit ● According to different operating Current of inverter frequency and different load, current will compressor 1 vary from 7A to 25A. ● When ambient temp is lower than 35℃, IPM module temp of ℃...
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Page 62: Common Malfunction And Troubleshooting
Too many heat resources in the room Reduce heat resources Filter is blocked for dirt Clean the filter Note: If problem cannot be solved after checking the above items, please contact Gree service center and show phenomena and models. Following circumstance are not malfunction. “Malfunction”... -
Page 63: Error Indication
Heat Recovery DC Inverter Multi VRF Unit The room odor absorbed by the unit is blew out The unit emits odor Operating again Indoor fan motor will keep running 20-70s so as Indoor unit still runs after After every indoor unit receives "stop" to take good use of excess cooling and heating switch off signal, fan will keep running... - Page 64 Heat Recovery DC Inverter Multi VRF Unit Content symbol Division symbol Voltage Malfunction of Driving board of Reset protection Over-current protection of Drive PFC driving board fan operates of driving module protection of driving board protection of fan of fan abnormally of fan inverter fan...
- Page 65 Heat Recovery DC Inverter Multi VRF Unit Content symbol Division symbol compressor sensor of compressor compressor compressor drive DC bus bar compressor Drive IPM Malfunction of Malfunction of High-voltage Drive IPM high Desynchronizing module drive drive storage protection of temperature protection of fan’s drive DC protection of...
- Page 66 Heat Recovery DC Inverter Multi VRF Unit drive Emergency Identification Setting of operation DIP Charging of malfunction main IDU is switch code of refrigerant is of IDU of succeeded compressor is invalid mode wrong exchanger Debugging The matching Communication Malfunction Address DIP ratio of rated malfunction...
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Page 67: Maintenance And Care
Gree. Warranty should meet the folowing 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. - Page 68 GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI Add: West Jinji Rd, Qianshan, Zhuhai, Guangdong, China, 519070 Tel: (+86-756) 8522218 Fax: (+86-756) 8669426 E-mail: gree@gree.com.cn www.gree.com...