Bu sayfa, kılavuzun PDF dosyasındaki metnin tamamıdır (sayfa sayfa). Görseller ve çizimler için PDF'i açın. — sibastore.com
Owner's Manual Original Instructions Commercial Air Conditioners DC Inverter Multi VRF System Applicable Models: GMV-60WL/C-T(U) GMV-48WL/C-T(U) GMV-36WL/C-T(U)
For correct installation and operation, please read all instructions carefully. Before reading the instructions, please be aware of the following items: (1) The design standard of multi VRF system conforms to related standard of sales countries. (2) To ensure safety when operating this system, please strictly follow the instructions in this manual. (3) The total capacity of running indoor units must not exceed that of the outdoor units. Otherwise, the cooling (heating) effect of each IDU would be poor. (4) Make sure that this manual is kept by direct operators and maintainers. (5) If the product needs to be installed, moved or maintained, please contact our designated dealer or local service center for professional support. Users should not disassemble or maintain the unit by themselves, otherwise it may cause relative damage, and our company will bear no responsibilities. (6) All the illustrations and information in the instruction manual are only for reference. In order to make the product better, we will continuously conduct improvement and innovation. If there is adjustment in the product, please subject to actual product. (7) Under the standby status, the unit will consume a little power for ensuring reliability of the complete unit, maintaining normal communication and preheating refrigerant. When the unit won’t be used for a long time, please cut off the power of the complete unit. However, please preheat it when operating the unit next time. DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product. (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer. (3) After verification, the defect of product is directly caused by corrosive gas. (4) After verification, defects are due to improper operation during transportation of product. (5) Operate, repair, maintain the unit without abiding by instruction manual or related regulations. (6) After verification, the problem or dispute is caused by the quality specification or performance of parts and components that produced by other manufacturers. (7) The damage is caused by natural calamities, bad using environment or force majeure. Preface User Notice Exception Clauses
1 Safety Notices (Please be sure to abide them) ....................................................... 1 2 Product Introduction ................................................................................................. 2 2.1 Names of Main Parts ........................................................................................................ 2 2.2 Combinations of Indoor and Outdoor Units ....................................................................... 3 2.3 Operating Range .............................................................................................................. 3 3 Preparation before Installation ................................................................................. 3 3.1 Standard Parts .................................................................................................................. 3 3.2 Installation Site ................................................................................................................. 4 3.3 Piping Work Requirements ............................................................................................... 5 4 Installation Instruction .............................................................................................. 5 4.1 Dimension of Outdoor Unit and Mounting Hole ................................................................. 5 4.2 Connection Pipe ............................................................................................................... 6 4.3 Installation of Connection Pipe.........................................................................................10 4.4 Disassembly of Compressor Feet ....................................................................................14 4.5 Vacuum Pumping, Refrigerant Adding .............................................................................15 4.6 Electric Wiring ..................................................................................................................17 5 Check Items after Installation and Test Operation ................................................ 20 5.1 Check Items after Installation ...........................................................................................20 5.2 Test Operation and Debugging ........................................................................................20 6 Common Malfunctions and Troubleshooting ........................................................ 26 7 Error Indication ........................................................................................................ 28 8 Maintenance and Care ............................................................................................. 31 8.1 Outdoor Heat Exchanger .................................................................................................31 8.2 Drain Pipe ........................................................................................................................31 8.3 Notice before Seasonal Use ............................................................................................32 8.4 Maintenance after Seasonal Use .....................................................................................32 8.5 Parts Replacement ..........................................................................................................32 9 After-sales Service ................................................................................................... 32 Contents
DC Inverter Multi VRF System 1 Safety Notices (Please be sure to abide them) If not abide them strictly, it may cause severe damage to the unit or the people. If not abide them strictly, it may cause slight or medium damage to the unit or the people. This sign indicates that the items must be prohibited. Improper operation may cause severe damage or death to people. This sign indicates that the items must be observed. Improper operation may cause damage to people or property. (1) This product can’t be installed at corrosive, inflammable or explosive environment or the place with special requirements, such as kitchen. Otherwise, it will affect the normal operation or shorten the service life of the unit, or even cause fire hazard or serious injury. As for above special places, please adopt special air conditioner with anti-corrosive or anti-explosion function. (2) Follow this instruction to complete the installation work. Please carefully read this manual before unit startup and service. (3) Wire size of power cord should be large enough. The damaged power cord and connection wire should be replaced by exclusive cable. (4) After connecting the power cord, please fix the electric box cover properly in order to avoid accident. (5) Never fail to comply with the nitrogen charge requirements. Charge nitrogen when welding pipes. (6) Never short-circuit or cancel the pressure switch to prevent unit damage. (7) Please firstly connect the wired controller before energization, otherwise wired controller can not be used. (8) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant leakage, electric shock, or fire etc. (9) Do not insert fingers or objects into air outlet/inlet grille. (10) Open the door and window and keep good ventilation in the room to avoid oxygen deficit when the gas/oil supplied heating equipment is used. (11) Never start up or shut off the air conditioner by means of directly plug or unplug the power cord. (12) Turn off the unit after it runs at least five minutes; otherwise it will influence oil return of the compressor. (13) Do not allow children operate this unit. (14) Do not operate this unit with wet hands. (15) Turn off the unit or cut off the power supply before cleaning the unit, otherwise electric shock or injury may happen. (16) Never spray or flush water towards unit, otherwise malfunction or electric shock may happen. (17) Do not expose the unit to the moist or corrosive circumstances. (18) Under cooling mode, please don't set the room temperature too low and keep the temperature difference between indoor and outdoor unit within 5℃ (41℉). (19) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please contact our designated dealer or local service center for help. (20) Before installation, please check if the power supply is in accordance with the requirements specified on the nameplate. And also take care of the power safety. (21) Installation should be conducted by dealer or qualified personnel. Please do not attempt to install the unit by yourself. Improper handling may result in water leakage, electric shock or fire disaster etc. (22) Be sure to use the exclusive accessory and part to prevent the water leakage, electric shock and fire accidents. (23) Make sure the unit can be earthed properly and soundly after plugging into the socket so as to avoid electric shock. Please do not connect the ground wire to gas pipe, water pipe, lightning rod or telephone line. (24) Electrify the unit 8 hours before operation. Please switch on for 8 hours before operation. Do not cut off the power when 24 hours short-time halting (to protect the compressor). 1
(25) If refrigerant leakage happens during installation, please ventilate immediately. Poisonous gas will emerge if the refrigerant gas meets fire. (26) Volatile liquid, such as diluent or gas will damage the unit appearance. Only use soft cloth with a little neutral detergent to clean the outer casing of unit. (27) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main power supply, and then immediately contact our designated dealer or local service center. If abnormality keeps going, the unit might be damaged and lead to electric shock or fire. If the product needs to be installed, moved or maintained, please contact our designated dealer or local service center for professional support, otherwise our company would bear no legal reliability for the related damages arising therefrom. 2 Product Introduction Gree Multi VRF System adopts inverter compressor technology. By changing the displacement of compressor, step less capacity regulation within range of 15%~100% can be realized. Various product lineups are provided with capacity range from 36000Btu/h to 60000Btu/h, which can be widely used in residential, commercial and working area and especially applicable to places with big load change. Gree residential air conditioner is absolutely your best choice. 2.1 Names of Main Parts DC Inverter Multi VRF System GMV-36WL/C-T(U), GMV-48WL/C-T(U) 2
DC Inverter Multi VRF System GMV-60WL/C-T(U) Fig.2.1 2.2 Combinations of Indoor and Outdoor Units (1) See below the number of indoor units that can be connected to the outdoor unit. (2) The total capacity of indoor units should be within 50%~135% of that of the outdoor unit. Model Max sets of connectable IDUS GMV-36WL/C-T(U) 7 GMV-48WL/C-T(U) 8 GMV-60WL/C-T(U) 10 (3) Outdoor units of DC Inverter Multi VRF System can be connected to various indoor units. When any one of the indoor units receives operating command, outdoor unit will start operation as per required capacity. When all indoor units stop, outdoor unit will be shut off. 2.3 Operating Range Cooling Outdoor temperature: -5~48°C(23~118°F) Heating Outdoor temperature: -20~27°C(-4~81°F) 3 Preparation before Installation Graphics here are only for reference. Please refer to actual products. 3.1 Standard Parts Please use the supplied standard parts as required. Parts for Outdoor Unit No. Name Appearance Qty Remark 1 User Manual 1 — 2 Wiring (match with resistance) 1 Must be connected to the last IDU of communication connection 3 Corrugated pipe 1 GMV-36WL/C-T(U) GMV-48WL/C-T(U) 4 Liquid side connection pipe 1 This part is included in the following models: GMV-60WL/C-T(U) 3
No. Name Appearance Qty Remark 5 Gas side connection pipe 1 This part is included in the following models:GMV-60WL/C-T(U) 6 Chassis gluey plug 3 — 7 Drainage joint 1 — 3.2 Installation Site (1) The unit must be installed where strong enough to withstand the weight of the unit and fixed securely, otherwise the unit would topple or fall off. (2) Do not install where there is a danger of combustible gas leakage. (3) Do not install the unit near heat source, steam, or flammable gas. (4) Children under 10 years old must be supervised not to operate the unit. (5) Select a location which is out of children’s reach. Keep the unit away from children. (6) Make sure the location has space for heat exchange and maintenance so that unit can operate reliably with good ventilation. (7) Make sure the location has space for heat exchange and maintenance so that unit can operate reliably with good ventilation. (8) Install the unit where it will not be tilted by more than 5°. (9) During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely. (1) If possible, do not install the unit where it will be exposed to direct sunlight (If necessary, install a blind that does not interfere with the air flow). (2) Install ODU in a place where it will be free from getting dirty or getting wet by rain as much as possible. (3) Install ODU where it is convenient to connect IDU. (4) ODU and IDU should stay as close as possible to shorten the length of refrigerant pipe and reduce bend angles. (5) Install ODU where the condensate water can be drained out freely during heating operation. Do not place animals and plants in the path of the warm air. (6) Take the air conditioner weight into account and select a place where noise and vibration are small If the ODU is totally surrounded by walls, please refer to Fig.3.1 for space dimension: DC Inverter Multi VRF System Parts for Outdoor Unit Unit: mm(inch) Fig.3.1 4
DC Inverter Multi VRF System 3.3 Piping Work Requirements Refer to the table below for piping work requirements: R410A Refrigerant System Outer diameter (mm/inch) Wall thickness (mm/inch) Φ6.35(Φ1/4) ≥0.8(1/32) Φ9.52(Φ3/8) ≥0.8(1/32) Φ12.7(Φ1/2) ≥0.8(1/32) Φ15.9(Φ5/8) ≥1.0(1/25) Φ19.05(Φ3/4) ≥1.0(1/25) 4 Installation Instruction Graphics here are only for reference. Please refer to actual products. 4.1 Dimension of Outdoor Unit and Mounting Hole Unit Outline and Installation Dimension. Fig.4.1 Unit: mm(inch) Model A B C D E GMV-36WL/C-T(U) GMV-48WL/C-T(U) 900 (35-3/8) 340 (13-3/8) 1345 (53) 572 (22-1/2) 378 (15) GMV-60WL/C-T(U) 940 (37) 320 (12-9/16) 1430 (56-1/4) 632 (24-7/8) 350 (14-7/8) 5
4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection DC Inverter Multi VRF System Fig.4.2 6
DC Inverter Multi VRF System 4.2.2 Allowable Length and Height Difference of Connection Pipe Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in Fig.4.3 below. Equivalent length of one Y-type branch is 0.5m(1-5/8feet). Fig.4.3 Allowable Length and Height Difference of Connection Pipe Piping parameters of GMV-36WL/C-T(U), GMV-48WL/C-T(U), GMV-60WL/C-T(U): Allowable value — Fitting pipe m feet Total length (actual length) of fitting pipe 300 984 L1+L2+L3+a+b+c+d Actual length 120 394 L1+L2+L3+d Equivalent length 150 492 Length of farthest fitting pipe From the 1st branch to the farthest indoor pipe 40 131 L2+L3+d ODU at upper side 50 164 — Height difference between ODU and IDU ODU at lower side 40 131 — Height difference between IDUs 15 49 — 7
4.2.3 Dimension of Pipe (Main Pipe) from ODU to the 1st Indoor Branch Dimension of pipe from ODU to the 1st indoor branch will be determined by the dimension of outdoor connection pipe. Dimension of outdoor connection pipe: Basic module GMV-36WL/C-T(U) Φ15.9 (Φ5/8) Φ9.52 (Φ3/8) GMV-48WL/C-T(U) Φ15.9 (Φ5/8) Φ9.52 (Φ3/8) GMV-60WL/C-T(U) Φ19.05 (Φ3/4) Φ9.52 (Φ3/8) 4.2.4 Selection of Indoor Branches Select indoor branches according to the total capacity of downstream indoor units. Refrigerant system Total capacity of downstream indoor units C (Btu/h) Model Y type branch DC Inverter Multi VRF System Fig.4.4 Pipe dimension Gas pipe (mm/inch) Liquid pipe (mm/inch) Fig.4.5 C<68200 FQ01A/A 68200≤C≤102400 FQ01B/A 102400<C≤238800 FQ02/A 238800<C≤460600 FQ03/A 460600<C FQ04/A 8
DC Inverter Multi VRF System 4.2.5 Dimension of Pipe between Indoor Branches Select pipe between indoor branches according to the capacity of downstream indoor units; if the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails. Total capacity of downstream indoor units C (Btu/h) Pipe (mm/inch) Liquid pipe (mm/inch) C≤19000 Φ12.7 (Φ1/2) Φ6.35 (Φ1/4) 19000<C≤48500 Φ15.9 (Φ5/8) Φ9.52 (Φ3/8) 48500<C≤76400 Φ19.05 (Φ3/4) Φ9.52 (Φ3/8) 4.2.6 Dimension of Pipe between Indoor Branch and IDU Dimension of pipe between indoor branch and IDU should be consistent with the dimension of indoor pipe. Rated capacity of IDU C(Btu/h) Gas pipe (mm/inch) Liquid pipe (mm/inch) C≤9600 Φ9.52 (Φ3/8) Φ6.35 (Φ1/4) 9600<C≤17000 Φ12.7 (Φ1/2) Φ6.35 (Φ1/4) 17000<C≤48000 Φ15.9 (Φ5/8) Φ9.52 (Φ3/8) 48000<C≤55000 Φ19.05 (Φ3/4) Φ9.52 (Φ3/8) 55000<C≤96000 Φ22.2 (Φ7/8) Φ9.52 (Φ3/8) If the distance between IDU and its nearest branch is over 10m(33feet), then the liquid pipe of IDU (rated capacity ≤17000Btu/h) shall be enlarged. Fig.4.6 Fig.4.7 9
4.3 Installation of Connection Pipe
(1)
Conform to the following principles during pipe connection: Connection pipe should be as short as possible, so is
the height difference between indoor and outdoor units. Keep the number of bends as little as possible. Radius of
curvature should be as large as possible.
(2)
Weld the connection pipe between indoor and outdoor units. Please strictly follow the requirements for welding
process. Rosin joint or pin hole is not allowed.
(3)
When laying the pipe, be careful not to distort it. Radius of bending parts should be over 200mm(8inch). Note that
pipes cannot be repeatedly bent or stretched; otherwise the material will get harder. Do not bend or stretch the
pipe for more than 3 times at the same position.
4.3.1 Flaring Process
(1) Use pipe cutter to cut the connection pipe in case it is unshaped.
(2) Keep the pipe downward in case cutting scraps get into the pipe. Clear away the burrs after
cutting.
(3) Remove the flared nut connecting indoor connection pipe and outdoor unit. Then use flaring
tool to fix the flared nut into the pipe (as shown in Fig.4.8).
(4) Check if the flared part is flaring evenly and if there is any crack.
4.3.2 Pipe Bending
(1) Reshape the pipe by hand. Be careful not to damage the pipe.
(2) Do not bend the pipe over 90°.
(3) If pipe is repeatedly bent or stretched, it will get hard and difficult to bend and stretch again.
Therefore, do not bend or stretch the bend for over 3 times.
(4) In case that direct bending will open cracks to the pipe, first use sharp cutter to cut the
insulating layer, as shown in Fig.4.10. Do not bend the pipe until it is exposed. When
bending is done, wrap the pipe with insulating layer and then secure it with adhesive tape.
Fig.4.9 Fig.4.10
DC Inverter Multi VRF System
Fig.4.8
10 DC Inverter Multi VRF System 4.3.3 Indoor Pipe Connection (1) Remove pipe cover and pipe plug. (2) Direct the flared part of copper pipe to the center of screwed joint. Twist on the flared nut tightly by hand, as in Fig.4.11 (Make sure indoor pipe is correctly connected. Improper location of the center will prevent flared nut from being securely twisted. Thread of nut will get damaged if the flared nut is twisted forcibly). (3) Use torque wrench to twist on the flared nut tightly until the wrench gives out a click sound (Hold the handle of wrench and make it at right angle to the pipe. as in Fig.4.12). (1) Use sponge to wrap the un-insulated connection pipe and joint. Then tie the sponge tightly with plastic tape. (2) Connection pipe should be supported by a bearer rather than the unit. (3) The bending angle of piping should not be too small; otherwise the piping might have cracks. Please use a pipe bender to bend the pipe. (4) When connecting IDU with connection pipe, do not pull the big and small joints of IDU with force in case the capillary tube or other tubes have cracks and cause leakage. Fig.4.11 Fig.4.12 Pipe diameter Tightening torque Φ6.35mm 15~30(N·m) Φ9.52mm 35~40(N·m) Φ12.7mm 45~50(N·m) Φ15.9mm 60~65(N·m) 4.3.4 Outdoor Pipe Connection (1) Pipe connection for GMV-36WL/C-T(U), GMV-48WL/C-T(U). Twist the flared nut on the connection pipe of outdoor valves. Twisting method is the same as for indoor pipe connection. During engineering installation, the connection pipe inside the unit must be wrapped by insulation sleeve. According to customer requirement or space limit, outlet pipe can be installed from the front, right or rear side. 11
(2) Pipe connection for GMV-60WL/C-T(U). As shown in Fig.4.14 and Fig.4.15, open the outermost soundproof cotton and place a fire barrier between compressor and straight pipe. Use a soldering gun to unsolder straight pipe 1 and straight pipe 2. Install connection pipe 1 and connection pipe 2 to the corresponding position and then seal the apertures with welding rod. First weld the liquid side connection pipe and then weld the gas side connection pipe. During welding, it’s necessary to use wet gauze to wrap up the two cut-off valves. Make sure the flame won’t burn the soundproof cotton or other components. DC Inverter Multi VRF System Fig.4.13 Fig.4.14 Fig.4.15 12
DC Inverter Multi VRF System 4.3.5 Installation of Y-type Branch (1) Y-type Branch. Fig.4.16 (2) Y-type branch has several pipe sections with different dimension, which facilitates to match with various copper pipes. Use pipe cutter to cut in the middle of the pipe section that is of proper dimension and remove burrs as well. See Fig.4.17. (3) Y-type branch must be installed vertically or horizontally. Branch shall be isolated by insulating material that can bear 120°C(248°F) or even higher temperature. The attached foam of branch cannot be taken as insulating material. 4.3.6 Thermal Insulation for Pipeline (1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection. (2) At the branch inlet, leave at least 500mm(19-3/4inch) straight pipe section. (3) Thermal insulation for pipeline 1) To avoid condensate or water leakage on the connection pipe, the gas pipe and liquid pipe must be wrapped with thermal insulating material and adhesive tape for insulation from the air. 2) Joints of indoor and outdoor unit should be wrapped with insulating material and leave no gap between pipe and wall. See Fig.4.18. Fig.4.17 13
3) When wrapping the tape, the later circle should cover half of the former one. Don’t wrap the rape too tight, otherwise the insulation effect will be weakened. 4) After wrapping the pipe, apply sealing material to completely seal the hole on the wall. (1) Thermal insulating material shall be able bear the pipe temperature. For heat pump unit, liquid pipe should bear 70°C(158°F) or above and gas pipe should bear 120°C(248°F) or above. For cooling only unit, both liquid pipe and gas pipe should bear 70°C(158°F) or above. (2) 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. 4.3.7 Support and Protection of Pipeline (1) Support should be made for hanging connection pipe. Distance between each support cannot be over 1m(3-1/4feet). (2) Protection against accidental damage should be made for outdoor pipeline. When pipeline exceeds 1m(3-1/4feet), a pinch board should be added for protection. 4.4 Disassembly of Compressor Feet In order to prevent unit from damage during transportation, 2 metal pieces are fitted to outdoor unit’s compressor feet before unit leaves factory. See Fig.4.19. When installing the unit, metal pieces for transportation must be removed (except for GMV-60WL/C-T(U)). Then fasten the binding nuts again and wrap back soundproofing cotton. If unit runs with metal pieces fitting on, compressor will shake abnormally and unit’s operating life will be shortened. DC Inverter Multi VRF System Fig.4.18 Fig.4.19 14
DC Inverter Multi VRF System 4.5 Vacuum Pumping, Refrigerant Adding Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation! There is no extra refrigerant in the outdoor unit for air purging! 4.5.1 Vacuum Pumping (1) Outdoor unit has been charged with refrigerant before delivery. Field-installed connection pipe needs to be charged with additional refrigerant. (2) Confirm whether outdoor liquid and gas valves are closed. (3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor valve, as shown in Fig.4.20 below. 4.5.2 Refrigerant Adding (1) Refrigerant quantity of outdoor unit before delivery: Model GMV-36WL/C-T(U) GMV-48WL/C-T(U) GMV-60WL/C-T(U) Refrigerant Qty (kg/oz) 3.3(116) 3.3(116) 4.6(162) (1) The refrigerant amount charged before delivery doesn’t include the amount that needs to be added to indoor units and the connection pipeline. (2) Length of connection pipe is decided on site. Therefore, the amount of additional refrigerant shall be decided on site according to the dimension and length of field-installed liquid pipe. (3) Record the amount of additional refrigerant for convenience of after-sales service. (2) Calculation of the amount of additional refrigerant. Adding refrigerant method includes 2 steps as follow: 1) Amount of additional refrigerant depending on the pipe size(X). 2) Amount of additional refrigerant depending on Quantity of IDU(Y). Total charging amount =X+Y Detail calculation is as follow: 1) X= ∑(Liquid pipe length×amount of additional refrigerant of each 1m) Fig.4.20 15
Diameter of liquid pipe (mm/inch) Φ19.05(Φ3/4) Φ15.9(Φ5/8) Φ12.7(Φ1/2) Φ9.52(Φ3/8) Φ6.35(Φ1/4) kg/m 0.25 0.17 0.11 0.054 0.022 oz/inch 0.224 0.152 0.099 0.048 0.020 2) Y=(Quantity of IDU－2) ×0.3 kg(10.58oz) First confirm that there is no leakage from the system. When compressor is not working, charge additional R410A with specific amount to the unit through the filling opening of the liquid pipe valve of the outdoor unit. If required amount cannot be quickly filled due to pressure increase of the pipe, then set the unit in cooling startup and fill refrigerant from the low pressure check valve of the outdoor unit. Example： IDU: No. IDU ① IDU ② IDU ③ IDU ④ Model Duct type GMV-N18G/A3A-D(U) Liquid pipe: No. A B C D Pipe size Φ9.52mm (Φ3/8inch) Length 10m (32-3/4feet) No. a b c d Pipe size Φ9.52mm (Φ3/8inch) Length 3m (9-3/4feet) 1) Amount of additional refrigerant depending on the pipe size(X) Total length of each liquid pipe: Φ9.52: A+B+C+a=10+5+4+3=22m(72-3/16 feet) Φ6.35: D+b+c+d=5+3+3+2+1=11m(36-1/16 feet) 2) Amount of additional refrigerant depending on Quantity of IDU(Y) Quantity of indoor unit: 4 sets. Therefore, the total charging amount=(22×0.054)+(11×0.022)+(4-2) ×0.3=2.03kg(71-3/5oz) DC Inverter Multi VRF System Duct type GMV-N12G/A3A- D(U) Duct type GMV-ND09PLS/A-T(U) Duct type GMV-ND09PLS/A-T(U) Φ9.52mm (Φ3/8inch) Φ9.52mm (Φ3/8inch) Φ6.35 (Φ1/4inch) 5m (16-3/8feet) 4m (13-1/8feet) 5m (16-3/8feet) Φ6.35 (Φ1/4inch) Φ6.35 (Φ1/4inch) Φ6.35 (Φ1/4inch) 3m (9-3/4feet) 2m (6-3/4feet) 1m (3-1/4feet) 16
DC Inverter Multi VRF System 4.6 Electric Wiring (1) All electrical installation must be performed by qualified technicians in accordance with local laws, regulations and this user manual. (2) Use air conditioner specialized power supply and make sure that it is consistent with system’s rated voltage. (3) Do not pull the power cord with force. (4) Caliber of the power cord must be large enough. A damaged power cord or connection wire must be replaced by specialized electrical cords. (5) Connect the unit to specialized grounding device and make sure it is securely grounded. It’s a must to install air switch and current circuit breaker that can cut off the power of the entire system. The air switch should include magnetic trip function and thermal trip function so that system can be protected from short circuit and overload. (6) Air conditioner belongs to class I electrical appliance, so it must be securely grounded. (7) The yellow-green wire inside the unit is a ground wire. Do not cut it off or secure it with tapping screws, otherwise it will lead to electric shock. (8) Power supply must include secure grounding terminal. Do not connect the ground wire to the following: ①Water pipe; ②Gas pipe; ③Drain pipe; ④Other places that are deemed as not secure by professional technicians. 4.6.1 Electrical Wiring (1) For solid core wiring (Fig.4.22). 1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 25mm (15/16inch). 2) Using a screwdriver, remove the terminal screw(s) on the terminal board. 3) Using pliers, bend the solid wire to form a loop suitable for the terminal screw. 4) Shape the loop wire properly, place it on the terminal board and tighten securely with the terminal screw using a screwdriver. (2) For strand wiring (Fig.4.23). 1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 10mm (3/8inch). 2) Using a screwdriver, remove the terminal screw (s) on the terminal board. 3) Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped wire end. 4) Position the round terminal wire, and replace and tighten the terminal screw with a screwdriver (Fig.4.23). Fig.4.22 17
(3) How to fix connection cord and power cord by cord clamp. After passing the connection cord and power cord through the insulation tube, fasten it with the cord clamp (Fig.4.24). (1) Before starting work, check that power is not being supplied to the indoor unit and outdoor unit. (2) Match the terminal block numbers and connection cord colors with those of the indoor unit side. Erroneous wiring may cause burning of the electric parts. (3) Connect the connection cords firmly to the terminal block. Imperfect installation may cause a fire. (4) Always fasten the outside covering of the connection cord with cord clamps (If the insulator is not clamped, electric leakage may occur). (5) Always connect the ground wire. 4.6.2 Wiring Diagram (1) Connection of power cord and communication wire. Separate power supply for IDU and ODU. DC Inverter Multi VRF System Fig.4.23 Fig.4.24 Fig.4.25 18
DC Inverter Multi VRF System (2) Selection of air switch and power cord: Model Power supply GMV-36WL/C-T(U) 208/230V~ 60Hz 35 35 28.5 GMV-48WL/C-T(U) 208/230V~ 60Hz 40 40 33 GMV-60WL/C-T(U) 208/230V~ 60Hz 40 40 34.5 (1) Selection of circuit breaker and power cord in the above table is based upon unit’s maximum power (maximum current). (2) Specification of power cord is based on the working condition where ambient temperature is 40°C(104°F) and multi-core copper cable (working temperature is 90°C(194°F), e.g. power cable with YJV cross-linked copper, insulated PE and PVC sheath) is lying on the surface of slot. If working condition changes, please adjust the specification according to national standard. (3) Specification of circuit breaker is based on the working condition where ambient temperature of circuit breaker is 40°C(104°F). If working condition changes, please adjust the specification according to national standard. 4.6.3 Engineering Wiring of Power Supply and Communication Cable (1) Please refer Fig.4.26 & Fig.4.27 for engineering wiring. If there is the hole for cable tie in wiring route, please fix the wire with cable tie. Connect the power cord and communication cable to the corresponding terminal board and grounding screw according to the wiring diagram. (2) Please be noted that engineering wiring cannot touch the pipe and appliance. (3) This figure is only applicable for engineering wiring reference of power supply and communication cable. If there are differences between the figure structure and actual unit, please refer to the actual unit. (4) For engineering wiring, please refer to the wiring diagram provided with the unit. Max Fuse Size/Fusible Max. Max Ckt, Bkr Size/Disjoncteur Min. Circuit Ampacity (A) (A) Max. (A) Fig.4.26 19
5 Check Items after Installation and Test Operation 5.1 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. Unit gets proper thermal insulation or not? There may be condensation and dripping. Drainage is smooth or not? There may be condensation and dripping. Is the voltage in accordance with the rated voltage specified on the nameplate? Is the electric wiring and pipe connection installed correctly? Unit is securely grounded or not? Electrical leakage. Power cord meets the required specification? Unit may have malfunction or components may get damaged. Is the air inlet/outlet blocked? Insufficient cooling (heating) capacity. Length of refrigerant pipe and the charging amount of refrigerant are recorded or not? Binding pieces on compressor feet are removed or not? Compressor may get damaged. 5.2 Test Operation and Debugging (1) After finishing the first installation or replacing the main board of outdoor unit, it is necessary to perform test operation and debugging. Otherwise, unit won’t be able to work. (2) Test operation and debugging must be performed by professional technicians or under the guidance of professional technicians. DC Inverter Multi VRF System Fig.4.27 Unit may have malfunction or components may get damaged. Unit may have malfunction or components may get damaged. The refrigerant charging amount is not accurate. 20
DC Inverter Multi VRF System 5.2.1 Prepare the Test Operation and Debugging (1) Do not connect power until all installation work is finished. (2) All control circuits and wires are correctly and securely connected. (3) Check whether the fixing loops for compressor foots are removed. (4) All small pieces, especially metal chips, thread ends and forceps holder, must be removed from the unit. (5) Check whether unit’s appearance and pipeline system has been damaged during transportation. (6) Calculate the quantity of refrigerant that needs to be added according to the pipe length. Pre-charge the refrigerant. In case that the required charging quantity is not reached while refrigerant can’t be added, record the quantity of refrigerant that still needs to add and complement the quantity during test operation. For details of adding refrigerant during test operation, see below. (7) After refrigerant is added, make sure valves of outdoor unit are completely open. (8) For the convenience of troubleshooting during debugging, unit shall be connected to a PC with applicable debugging software. Make sure unit’s real-time data can be checked through this computer. The installation and connection of debugging software can be found in the Service Manual. (9) Before test operation, make sure unit is power on and compressor has been preheated for more than 8 hours. Touch the unit to check whether it’s normally preheated. If yes, start test operation. Otherwise, compressor might be damaged. 5.2.2 Test Operation and Debugging Description of test operation procedures and main board display of ODU Description of each stage of debugging progress — Debugging code Code meaning and operation method Progress LED Code Display status 01_Set master unit A0 ON System is not debugged, hold main board’s SW3 button for 5s to start debugging. 01 ON 2s later, next step starts. 02/Ad Display circularly 02_ Allocate addresses 02/L7 Display circularly 02/oC Display circularly Allocation is finished. 2s later, next step starts. 03_ Confirm the quantity of ODU 03/01 Display circularly System is confirming. 1s later, next step starts. 04/00~16 Display circularly 04_ Confirm the quantity of IDU 04/oC Display circularly System is allocating addresses. 10s later, display as below: No master indoor unit. Display will be on for 1min, during which master IDU can be set manually. If not, system will set the unit with minimum IP address as the master IDU. “00~16” displays the quantity of indoor unit. Confirm the number manually. If the number is not consistent the display one, cut off power of IDU and ODU and check whether communication wire of IDU is correctly connected. After the check, connect power and start debugging from progress 01. If the number is then correct, press main board’s SW3 button to confirm. Then the display is as below. System has confirmed the quantity. 2s later, next step starts. 21
DC Inverter Multi VRF System Description of each stage of debugging progress — Debugging code Code meaning and operation method Progress LED Code Display status Communication between master ODU and driver has error. Check the communication connection of ODU’s main board and drive board. When the error is eliminated, start next step. If power is off during troubleshooting, then restart debugging from progress 01 after power is on. 05/C2 Display circularly Communication of master ODU and driver is normal. Unit will display as in the left for 2s and detect the capacity ratio of IDU and ODU. If the ratio is within range, then next step will start 2s later. If the ratio is out of range, unit will display as below. 05_ Detect ODU’s internal communication and capacity ratio 05/oC Display circularly Rated capacity ratio of IDU is too high. Change the combination way of IDU and ODU to make the ratio within range. And restart debugging from progress 01. 05/CH Display circularly Rated capacity ratio of IDU is too low. Change the combination way of IDU and ODU to make the ratio within range. And restart debugging from progress 01. 05/CL Display circularly Outdoor component’s error. Besides “06”, the other blinking will display the related error code. After errors are eliminated, system will start next step automatically. If power is off during troubleshooting, then restart debugging from progress 01 after power is on. 06/error code Display circularly 06_ Detect outdoor components 06/oC Display circularly System detects no error on outdoor component. 10s later, next step starts. System detects error on indoor components. XX means the project code of IDU with error, e.g. no.1 IDU has d5 and d6 errors, meanwhile no.3 IDU displays error d6 and d7, then the nixie tube will display “07”, “01”, “d5”, “d6”and “03” circularly. After errors are eliminated, system will start next step automatically. If power is off during troubleshooting, then restart debugging from progress 01 after power is on. 07/XX/error code Display circularly 07_ Detect indoor components If errors occur in IDU which the project code is ≥ 3-digit number, then it will display the 2 big digits of project code first, then the 2 small digits, finally the error code, e.g: L1 error occurs in no.101 IDU, then the nixie tube will display “01”,“01” and “L1” circularly. Display method is the same for several IDUs with multiple errors. 07/XXXX/error code Display circularly 07/oC Display circularly No error on components of IDU. 5s later, next step starts. Preheat time for compressor is less than 8 hours. Display will be as in the left until the preheat time reaches 8 hours. Press main board’s SW3 button to confirm manually that the preheat time has reached 8 hours. Then start next step. (NOTE: Compressor may get damaged if it is started without 8 hours of preheat time) 08/U0 Display circularly 08_ Confirm preheated compressor Compressor has been preheated for 8 hours. 2s later, next step starts. 08/oC Display circularly 22
DC Inverter Multi VRF System Description of each stage of debugging progress — Debugging code Code meaning and operation method Progress LED Code Display status System is lack of refrigerant and display will be as in the left. Please cut off power of IDU and ODU and check if there is leakage on pipeline. Solve the leakage problem and complement refrigerant into the unit. Then connect power and restart debugging from progress 01. (Note: Before re-charging refrigerant, unit must be power off in case system starts progress 10 automatically) . 09/U4 Display circularly 09_ Refrigerant judgments before startup 09/oC Display circularly Refrigerant is normal and unit will display as in the left for 2s.Then next step starts. Valves of ODU are being inspected. Compressor will start operation for 2min or so and then stop. The opening and closing status of outdoor valves are as below. 10/on Display circularly Outdoor valves are not fully turned on. Press main board’s SW4 button and display shows “09/OC”. Then check if the gas and liquid valves of ODU are completely open. After confirmation, press the SW4 button again. Then compressor will start running for about 2min to inspect the status of valves. 10_Status judgments of outdoor valves before startup 10/U6 Display circularly 10/oC Display circularly Valves status is normal. Unit will display as in the left for 2s and then start next step. Ready for units to start debugging. Press main board’s SW3 button to confirm startup of debugging. 2s later, main board will display as below. 12/AP Display circularly Startup is confirmed. After displaying for 2s, system will choose “15_Cooling debugging” or “16_Heating debugging” according to ambient temperature. If the project requests to add refrigerant but it is not complemented before debugging, then refrigerant can be added in this process through the L-VALVE. 12_ Confirm debugging startup 12/AE Display circularly Debugging for cooling mode. If no malfunction occurs for 50min when compressor is running, then the system is certified as normal. After shutting down the unit for 5s, the system will enter normal standby status. 15/AC Display circularly 15_ Cooling debugging 15/error code Display circularly Malfunction occurs when debugging for cooling mode. Debugging for heating mode. If no malfunction occurs for 50min when compressor is running, then the system is certified as normal. After shutting down the unit for 5s, the system will enter normal standby status. 16/AH Display circularly 16_ Heating debugging(For heat pump units only) 16/error code Display circularly Malfunction occurs when debugging for heating mode. 17_ Debugging finished oF ON The entire unit has finished debugging and under standby-by condition. 23
DC Inverter Multi VRF System 5.2.3 Appendix: Reference of Normal Operation Parameters No. Debug item Parameter name Unit Reference Outdoor temperature °C(°F) — 1 When compressor starts, discharge temp in cool mode is within 70~105°C(158~221°F) and at least 10°C(50°F) higher than the high pressure saturation temp. As for temp in heat mode, it is within 2 Compressor discharge temp °C(°F) 65~90°C(149~194°F) and at least 10°C(50°F) higher than the high pressure saturation temp. In cool mode, defrosting temp is 4~10°C(39~50°F) lower than system’s high pressure value. In heat mode, defrosting temp is about 3 Defrosting temp °C(°F) 2°C(36°F) different from system’s low pressure value. In cool mode, the normal high pressure value is within 20~55°C(68~131°F). According to the change of ambient temp and system’s operating capacity, the high pressure value will be 10~30°C(50~86°F) higher than ambient temp. The higher ambient temp is, the smaller temp difference is. If ambient temp is 25~35°C(77~95°F) in cool mode, system’s high pressure value will be within 44~53°C(111~127°F). In heat mode, if ambient temp is above 4 System high pressure °C(°F) System parameters ODU parameters -5°C(23°F), system’s high pressure value is within 40~52°C(104~126°F). If ambient temp is low and many IDUs are turned on, the high pressure will be lower. When ambient temp in cool mode is 25~35°C(77~95°F), the low pressure value is 0~8°C(32~46°F). When ambient temp in heat mode is above 5 System low pressure °C(°F) -5°C(23°F), the low pressure value is -15~8°C(5~46°F). In cool mode, the thermal electronic 6 Opening degree of expansion valve remains 480PLS. In heat mode, the adjustable opening degree thermal EXV PLS of EXV is 60~480PLS. GMV-36WL/C-T(U) GMV-48WL/C-T(U) Changes in 10Hz~80Hz. 7 Compressor’s operating freq Hz GMV-60WL/C-T(U) Changes in 16Hz~80Hz 8 Compressor’s operating current A When compressor works normally, the current is no more than 22.6A. When ambient temp is below 35°C(95°F), IPM temp is lower than 80°C(176°F) and the highest temp won’t be above 95°C(203°F). 9 Compressor’s IPM temp °C(°F) Changes in 0~49Hz according to system’s pressure. GMV-36WL/C-T(U) GMV-48WL/C-T(U) 10 Fan motor’s operating freq Hz Changes in 0~40Hz according to system’s pressure. GMV-60WL/C-T(U) 24
DC Inverter Multi VRF System No. Debug item Parameter name Unit Reference 11 IDU ambient temp °C(°F) — According to ambient temp, for a same IDU 12 in cool mode, the inlet temp will be 1~7°C(34~45°F) lower than the outlet temp, and 4~9°C(39~48°F) higher than the low pressure value. For a same IDU in heat mode, the inlet temp Indoor heat exchanger’s inlet °C(°F) 13 temp will be 10~20°C(50~68°F) lower than the outlet temp. In cool mode, the opening degree of indoor EXV varies within 70~480PLS. In heat mode, the System parameters IDU parameters GMV-36WL/C-T(U) GMV-48WL/C-T(U) opening degree of indoor EXV varies within 70~480PLS. 14 Opening degree of indoor EXV PLS In cool mode, the opening angle of indoor EXV varies within 70~480PLS. In heat mode, the GMV-60WL/C-T(U) opening angle of indoor EXV varies within 40~480PLS. Number of IDUs detected by software is the same with the actual number. No communication error. 15 Communication Communication data — parameters Indoor unit can drain water out completely and smoothly. Condensate pipe has no backward slope of water; Water of outdoor unit can be drained completely through drainage pipe. No water drop from unit base. 16 Drainage system — — Compressor and indoor/outdoor fan motor do not have strange noise. Unit can operate normally. 17 Others — — 25
6 Common Malfunctions and Troubleshooting (1) If an abnormal situation (such as peculiar smell) occurs, please stop the operation immediately and turn off the main power supply, and then contact Gree authorized maintenance center. If the unit continues to operate under abnormal situation, the air conditioner will be damaged and an electric shock or fire accident may result. (2) Do not maintain the air conditioner by yourself, misoperation may cause electric shock or fire hazard. Please contact professional personnel of Gree authorized maintenance center to maintain. Before asking for maintenance, please check the following issues first. Phenomenon Causes Troubleshooting Fuse is broken or circuit breaker is open Replace fuse or close the circuit breaker Power failure Restart up the unit and then the unit will operate Air conditioner can’t Power supply is not connected Connect the power supply operate The power for batteries of remote controller is insufficient Replace the batteries Remote controller is not within the remote control range Remote control range is within 8m Air conditioner operates, while it stops Air inlet or air outlet of indoor unit/outdoor unit is blocked Eliminate the obstacles operation immediately Air inlet or air outlet of indoor unit/outdoor unit is blocked Eliminate the obstacles Temperature setting is improper Adjust temperature setting by remote controller or wired controller Fan speed is set too low Adjust fan speed setting by remote controller or wired controller Cooling or heating is Fan direction is not correct Adjust fan direction setting by remote controller or wired controller abnormal Door or window is open Close door and window Direct sunshine Hang curtains or window shade at the window Too many persons in the room — Too many thermal source in the room Reduce the thermal source The filter is dirty and blocked Clean the filter Instruction If problem cannot be solved after checking the above items, please contact Gree service center and describe the cases and models. Following circumstances are not malfunctions. Phenomenon Causes When unit is started immediately after it is just turned off Unit doesn’t run When power is turned on Standby operating for about 1 minute Mist comes from the unit Under cooling Indoor high humidity air is cooled rapidly When the power supply is connected, there is small “dada” sound. It is the sound of startup action of electronic expansion valve. When the system is conducting cooling or defrosting, there is continuous “sa——” sound. Noise is emitted When the system is switching cooling and heating modes; during heating operation, the unit enters or quits defrosting operation or oil return operation, there is “chi——” sound. DC Inverter Multi VRF System Overload protection switch makes it run after 3 minutes delay This is the sound of refrigerant flowing inside the unit. This is the sound for direction reversal of 4-way valve. 26
DC Inverter Multi VRF System Phenomenon Causes When the system is started or stopped for a short time, you can hear the sound of “sa——”; you can also hear this sound for a short time after the start or stop of the defrosting operation. When the system is in cooling operation or after it stops running, a continuous “sa ——” sound can be heard When the system is running or after it stops running, a “creaking” sound can be heard. This is the sound produced when plastic parts such as panel expansion and contraction due to temperature changes. When the system is in heating operation, after the indoor unit stops running, the sound like running water can be heard. This sound can be heard when other indoor units are running. This is to prevent oil and refrigerant from staying in the indoor unit, and to keep a small amount of refrigerant flowing. When the unit is running, the operating sound of the compressor changes. Noise is emitted When the indoor unit stops running, a faint “sa——” sound or “gurgling” sound can be heard. During the operation of the unit or after the operation is started or stopped, a continuous “sa ——” sound can be heard. When the operating mode of the unit changes, the indoor unit and outdoor unit will produce “sa ——” and “gurgling” sounds. This is because the outdoor unit is installed close to the window or wall, and the sound insulation is poor, and the external noise is transmitted in. There is dust blowing out from the unit The sound from the outdoor unit can be heard indoors Start operation after it is not used for a long time Dust in indoor unit is blew out The unit emits odor Operating The odor of the air conditioner is sucked into the room and then blown out The indoor unit is still running after shutting down The indoor unit is still running after shutting down When the selected operation mode of the indoor unit conflicts with the operation mode of the outdoor unit, after five seconds, the indoor unit error indicator flashes or the remote controller displays the operation conflict, and the indoor unit shuts down. At this time, the indoor unit can be converted to run with the outdoor unit. The mode can be restored to normal without conflict. The cooling mode and dry mode do not conflict, and the air supply does not conflict with any mode. Mode conflict Cooling or heating mode cannot start up This is the sound produced when the refrigerant stops or changes the flow. This is the operation sound of drain system. The unit is melting the frost on the outdoor unit, please wait about 10 minutes (due to different unit models, the waiting time will vary). This is caused by changes in compressor operating frequency. This is the sound produced when the refrigerant bypass valve operates. This is the sound produced when the refrigerant stops or changes flow. The fan of indoor unit will continue to work for 20 to 70 seconds to fully use the residual cooling or heat of the heat exchanger, and to prepare for the next use. 27
7 Error Indication Inquiry method of error indication: combine division symbol and content symbol to check the corresponding error. Indoor: Error Code Content Error Code Content L0 Malfunction of IDU (uniform) d1 Indoor PCB is poor L1 Protection of indoor fan d2 Malfunction of lower water temperature sensor of water tank L2 Auxiliary heating protection d3 Malfunction of ambient temperature sensor L3 Water-full protection d4 Malfunction of entry-tube temperature sensor L4 Abnormal power supply for wired controller d5 Malfunction of middle temperature sensor L5 Freeze prevention protection d6 Malfunction of exit-tube temperature sensor L6 Mode shock d7 Malfunction of humidity sensor L7 No main IDU d8 Malfunction of water temperature sensor L8 Power supply is insufficient d9 Malfunction of jumper cap L9 For single control over multiple units, number of IDU is inconsistent dA Web address of IDU is abnormal LA For single control over multiple units, IDU series is inconsistent dH PCB of wired controller is abnormal LH Alarm due to bad air quality dC Abnormal setting for capacity button LC IDU is not matching with outdoor unit dL Malfunction of air outlet temperature sensor LL Malfunction of water flow switch dE Malfunction of indoor CO2 sensor LE Rotation speed of EC DC water pump is abnormal dF Malfunction of upper water temperature sensor of water tank LF Malfunction of shunt valve setting dJ Malfunction of backwater temperature sensor LJ Setting of functional DIP switch code is wrong dP Malfunction of inlet tube temperature sensor of generator LP Zero-crossing malfunction of PG motor dU Malfunction of drainage pipe temperature sensor of generator LU Indoor unit’s branch is not inconsistent for one-to-more unit of heat recovery system db Debugging status Lb Inconsistent IDU of group-controlled reheat and dehumidification system dd Malfunction of solar power temperature sensor y1 Malfunction of inlet tube temperature sensor 2 dn Malfunction of swing parts y2 Malfunction of outlet tube temperature sensor 2 dy Malfunction of water temperature sensor y7 Malfunction of fresh air intake temperature sensor y8 Main error of indoor air box sensor yA IFD malfunction — — Outdoor: Error Code Content Error Code Content F0 Main board of ODU is poor E0 Malfunction of ODU (uniform) F1 Malfunction of high-pressure sensor E1 High-pressure protection F3 Malfunction of low-pressure sensor E2 Discharge low-temperature protection F5 Malfunction of discharge temperature sensor of compressor 1 E3 Low-pressure protection F6 Malfunction of exit-tube temperature sensor E4 High discharge temperature protection of compressor F7 Malfunction of humidity sensor Ed Drive module low temperature protection F8 Malfunction of water temperature sensor J0 Protection for other modules F9 Malfunction of jumper cap J1 Over-current protection of compressor 1 DC Inverter Multi VRF System 28
DC Inverter Multi VRF System Error Code Content Error Code Content FA Web address of IDU is abnormal J2 Over-current protection of compressor 2 FC Current sensor of compressor 2 is abnormal J3 Over-current protection of compressor 3 FL Current sensor of compressor 3 is abnormal J4 Over-current protection of compressor 4 FE Current sensor of compressor 4 is abnormal J5 Over-current protection of compressor 5 FF Current sensor of compressor 5 is abnormal J6 Over-current protection for compressor 6 FJ Current sensor of compressor 6 is abnormal J7 Gas-mixing protection of 4-way valve FP Malfunction of DC motor J8 High pressure ratio protection of system FU Malfunction of casing top temperature sensor of compressor 1 J9 Low pressure ratio protection of system Fb Malfunction of casing top temperature sensor of compressor 2 JA Protection because of abnormal pressure Fd Malfunction of exit tube temperature sensor of mode exchanger JC Water flow switch protection Fn Malfunction of inlet tube temperature sensor of mode exchanger JL Protection because high pressure is too low b1 Malfunction of outdoor ambient temperature sensor JE Oil-return pipe is blocked b2 Malfunction of defrosting temperature sensor 1 JF Oil-return pipe is leaking b3 Malfunction of defrosting temperature sensor 2 P0 malfunction of driving board of compressor (uniform) b4 Malfunction of liquid temperature sensor of sub-cooler P1 Driving board of compressor operates abnormally (uniform) b5 Malfunction of gas temperature sensor of sub-cooler P2 Voltage protection of driving board power of compressor (uniform) b6 Malfunction of inlet temp sensor of gas-liquid separator P3 Reset protection of driving module of compressor b7 Malfunction of outlet temp sensor of gas-liquid separator P4 Drive PFC protection of compressor b8 Malfunction of outdoor humidity sensor P5 Over-current protection of inverter compressor b9 Malfunction of gas temperature sensor of heat exchanger P6 Drive IPM module protection of compressor bA Malfunction of oil-return temperature sensor 1 P7 Malfunction of drive temperature sensor of compressor bH Clock of system is abnormal P8 Drive IPM high temperature protection of compressor bE Malfunction of inlet tube temperature sensor of condenser P9 Desynchronizing protection of inverter compressor bF Malfunction of outlet tube temperature sensor of condenser PA Malfunction of drive storage chip of compressor bJ High-pressure sensor and low-pressure sensor are connected reversely PH High-voltage protection of compressor’s drive DC bus bar bP Malfunction of temperature sensor of oil-return 2 PC Drive current detection circuit malfunction of compressor bU Malfunction of temperature sensor of oil return 3 PL Low-voltage protection of compressor’s drive DC bus bar bb Malfunction of temperature sensor of oil return 4 PE Phase-lacking of inverter compressor bd Malfunction of air inlet temperature sensor of subcooler PF Drive charging circuit malfunction of compressor bn Malfunction of liquid inlet temperature sensor of subcooler PJ Failure startup of inverter compressor H0 Malfunction of driving board of fan (uniform) PP AC current protection of inverter compressor H1 Driving board of fan operates abnormally (uniform) PU AC input voltage of drive of inverter compressor H2 Voltage protection of driving board power of fan (uniform) G0 PV reversed connection protection H3 Reset protection of driving module of fan G1 PV Anti-islanding protection H4 Drive PFC protection of fan G2 PV DC overcurrent protection H5 Over-current protection of inverter fan G3 PV power generation overload H6 Drive IPM module protection of fan G4 PV leakage current protection 29
Error Code Content Error Code Content H7 Malfunction of drive temperature sensor of fan G5 Phase-lacking protection at power grid side H8 Drive IPM high temperature protection of fan G6 Phase-lacking protection at power grid side H9 Desynchronizing protection of inverter fan G7 PV LVRT HA Malfunction of drive storage chip of inverter outdoor fan G8 Overcurrent protection at power grid side HH High-voltage protection of fan’s drive DC bus bar G9 Drive IPM module protection at power grid side HC Drive current detection circuit malfunction of fan GA Low/high input voltage protection at power grid side HL Low-voltage protection of fan’s drive DC bus bar GH Photovoltaic DC\DC protection HE Phase-lacking of inverter fan GC Photovoltaic DC hardware overcurrent protection HF Drive charging circuit malfunction of fan GL Grid side hardware overcurrent protection HJ Failure startup of inverter fan GE High or low photovoltaic voltage protection HP AC current protection of inverter fan GF DC bus neutral-point potential unbalance protection HU AC input voltage of drive of inverter fan GJ Grid side module high-temperature protection Gd Grid side current sensor protection GP Grid side temperature sensor protection Gn Insulation resistance protection GU Charging circuit protection Gy Unrecoverable error of grid drive (photovoltaic) Gb Grid side relay protection Debugging: Error Code Content Error Code Content U0 Preheat time of compressor is insufficient Cd Communication malfunction between mode exchanger and ODU U2 Wrong setting of ODU’s capacity code/jumper cap Cn Malfunction of network for IDU and ODU of mode exchanger U3 Power supply phase sequence protection Cy Communication malfunction of mode exchanger U4 Refrigerant-lacking protection C0 Communication malfunction between IDU, ODU and IDU’s wired controller U5 Wrong address for driving board of compressor C1 Communication malfunction between main control and DC-DC controller U6 Alarm because valve is abnormal C2 U7 Power grid DRED0 response protection C3 Communication malfunction between main control and inverter fan driver U8 Short-circuit malfunction of IDU C4 Malfunction of lack of IDU U9 Malfunction of pipe-line for ODU C5 Alarm because project code of IDU is inconsistent UA DC bus overvoltage protection at power grid side C6 Alarm because ODU quantity is inconsistent UH DC bus undervoltage protection at power grid side C7 Abnormal communication of converter UC Setting of main IDU is successful C8 Emergency status of compressor UL Emergency operation DIP switch code of compressor is wrong C9 Emergency status of fan UE Charging of refrigerant is invalid CA Emergency status of module UF Identification malfunction of IDU of mode exchanger CH Rated capacity is too high UJ FO protection for PV module CC Malfunction of lack of main control unit Ud Grid-connected driver board error CL Rated capacity is too low Un Communication malfunction between main control and inverter CE Communication malfunction between mode exchanger and IDU Uy Over-temperature protection for PV module CF Malfunction of multiple main control units DC Inverter Multi VRF System Communication malfunction between main control and inverter compressor driver 30
DC Inverter Multi VRF System Error Code Content Error Code Content CU Communication malfunction between IDU and the receiving lamp plate CJ Address DIP switch code of system is shocking Cb Overflow distribution of IP address CP Malfunction of multiple main wired controllers Status: Error Code Content Error Code Content A0 Unit waiting for debugging n0 SE operation setting of system A2 Refrigerant recovery operation of after-sales n3 Compulsory defrosting A3 Defrosting n4 Limit setting for max. capacity/output capacity A4 Oil-return n5 Compulsory excursion of engineering code of IDU A6 Heat pump function setting n6 Inquiry of malfunction A7 Quiet mode setting n7 Inquiry of parameters A8 Vacuum pump mode n8 Inquiry of project code of IDU AH Heating n9 Check quantity of IDU on line AC Cooling nA Heat pump unit AL Charging refrigerant automatically nH Heating only unit AE Charging refrigerant manually nC Cooling only unit AF Fan nE Negative sign code AJ Alarm for cleaning filter nF Fan model AP Debugging confirmation for startup of unit nJ High temperature prevention when heating AU Long-distance emergency stop nU Eliminate the long-distance shielding command of IDU Ab Emergency stop of operation nb Bar code inquiry Ad Limit operation nn Length modification of connection pipe of ODU An Child lock status Ay Shielding status 8 Maintenance and Care Regular check, maintenance and care can extend unit’s service life. Please have specialized person in charge of the management of air conditioners. 8.1 Outdoor Heat Exchanger Outdoor heat exchanger shall be cleaned regularly, which is at least once every two months. You can use a dust catcher with nylon brush to clean away the dust on the heat exchanger. If compressed air source is available, it also can be used to clean the heat exchanger. Do not clean it with water. 8.2 Drain Pipe Please check regularly whether drain pipe is blocked or not. Make sure condensate can be drained out smoothly. 31
8.3 Notice before Seasonal Use (1) Check whether air inlets and air outlets of indoor and outdoor units are blocked. (2) Check whether ground connection is reliable or not. (3) Check whether batteries in the remote controller are replaced or not. (4) Check whether air filter is properly installed. (5) If unit starts up after not operating for a long time, it should be power on 8 hours before operation starts so as to preheat the outdoor compressor. (6) Check whether outdoor unit is securely installed. If there is any problem, please contact Gree authorized service center. 8.4 Maintenance after Seasonal Use (1) Disconnect power of the entire system. (2) Clean the air filter and outer case of indoor and outdoor units. (3) Clean away the dust and obstacles on indoor and outdoor units. (4) If outdoor unit has rust, please apply some paint to it so as to prevent the rust from growing. 8.5 Parts Replacement Parts and components can be obtained from nearby Gree office or Gree distributor. When you are conducting air tightness test and leakage test, do not mix oxygen, C2H2 or other dangerous gas into the refrigerant circuit. Otherwise, it may lead to danger. Use nitrogen or refrigerant to conduct the tests. 9 After-sales Service If there’s quality defect or other problems in the product, please contact Gree local after-sales service department for help. Warranty must be based on the following conditions: (1) Product’s initial startup must be performed by professional technicians from Gree service center or persons assigned by Gree. (2) Only Gree spare parts are used. (3) All instructions of unit operation and maintenance in this manual must be strictly followed according to set period and set frequency. (4) Any breach of the above conditions will disable the warranty. DC Inverter Multi VRF System 32
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: global@cn.gree.com www.gree.com