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Owner's Manual Original Instructions Commercial Air Conditioners DC Inverter Multi VRF System Applicable Models: GMV-60WL/A-T(U) GMV-48WL/A-T(U) GMV-36WL/A-T(U)
Preface For correct installation and operation, please read all instructions carefully. Before reading the instructions, please be aware of the following items: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of the user. CAUTION This mark indicates procedures which, if improperly performed, might possibly result in personal harm to the user, or damage to property. NOTICE is used to address practices not related to personal injury. WARNING (1). Instructions for installation and use of this product are provided by the manufacturer. (2). Installation must be performed in accordance with the requirements of NEC and CEC by authorized personnel only. (3). For the safe operation of this unit, please read and follow the instructions carefully. (4). During operation, total capacity of indoor units should not exceed the total capacity of outdoor units. otherwise, poor effect of cooling or heating may result. (5). Direct operators or maintainers should well keep this manual. (6). If this unit fails to operate normally, please contact our service center as soon as possible and provide the following information: 1). Content on the name plate (model number,cooling capacity,production code,ex-factory date. 2). Malfunction details (before and after the malfunction occurs. (7). Each unit has been strictly tested and proved to be qualified before ex-factory. In order to prevent units from being damaged or operating normally because of improper disassembly, please do not disassemble the unit by yourself. If you need to disassemble and check units, please contact our service center. We will send specialists to guide the disassembly. (8). All graphics in this manual is only for your reference. For sales or production reasons,these graphics are subject to change by manufacturer without prior notice. (9). This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.Children should be supervised to ensure that they do not play with the appliance. User Notice 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. Exception Clauses
1 Safety Precautions ........................................................................................................................................................ 1 2 Product Introduction ...................................................................................................................................................... 2 2.1 Names of Main Parts ......................................................................................................................................... 3 2.2 Combinations of Indoor and Outdoor Units.................................................................................................... 4 2.3 Operating Range ................................................................................................................................................ 4 3 Preparation before Installation .................................................................................................................................... 4 3.1 Standard Parts .................................................................................................................................................... 4 3.2 Installation Site ................................................................................................................................................... 5 3.3 Piping Work Requirements ............................................................................................................................... 6 4 Installation Instruction ................................................................................................................................................... 7 4.1 Dimension of Outdoor Unit and Mounting Hole ............................................................................................. 7 4.2 Connection Pipe ................................................................................................................................................. 8 4.3 Installation of Connection Pipe ...................................................................................................................... 12 4.4 Disassembly of Compressor Feet ................................................................................................................. 17 4.5 Vacuum Pumping, Refrigerant Adding .......................................................................................................... 18 4.6 Electric Wiring .................................................................................................................................................. 20 5 Check Items after Installation and Test Operation ................................................................................................. 24 5.1 Check Items after Installation ......................................................................................................................... 25 5.2 Test operation and debugging ........................................................................................................................ 25 6 Common Malfunctions and Troubleshooting .......................................................................................................... 30 7 Error Indication ............................................................................................................................................................ 32 8 Function Setting of Outdoor Unit .............................................................................................................................. 35 8.1 ODU Quiet Function ........................................................................................................................................ 35 8.2 Cool & Heat Function ...................................................................................................................................... 36 8.3 Forced Defrosting ............................................................................................................................................ 37 8.4 Restore Factory Defaults ................................................................................................................................ 37 8.5 Static Pressure Function ................................................................................................................................. 37 9 Maintenance and Care ............................................................................................................................................... 38 9.1 Outdoor Heat Exchanger ................................................................................................................................ 38 9.2 Drain Pipe ......................................................................................................................................................... 38 9.3 Notice before Seasonal Use .......................................................................................................................... 38 9.4 Maintenance after Seasonal Use .................................................................................................................. 38 9.5 Parts Replacement .......................................................................................................................................... 38 10 After-sales Service .................................................................................................................................................... 39 Contents
1 Safety Precautions (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 nitrigen charge requirements.Charge nitrogen when welding pipes. (6) Never short-circiut 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˚F). (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. 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.. DC Inverter Multi VRF System WARNING 1
DC Inverter Multi VRF System (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). (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 immerdiately contact Gree appointed service center.If abnormality keeps going, the unit might be damaged and lead to electric shock or fire. (28)Turn off the unit after it runs at least five minutes;otherwise it will influence oil return of the compressor. (29) Under the standby status, the unit will consume a little power for ensuring reliability of complete unit, maintaining normal communication and preheating refrigerant. When the unit won’t be used for a long time, cut off the power of the complete unit. However, please preheat it when operating the unit next time. Any personal injury or property loss caused by improper installation, improper debug, unnecessary repair or not following the instructions of this manual should not be the responsibility of Gree Electric Appliances, Inc. of Zhuhai. 2 Product Introduction Gree Multi VRF System adopts inverter compressor technology. By changing the displacement of compressor, stepless 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
2.1 Names of Main Parts GMV-36WL/A-T(U)、GMV-48WL/A-T(U) Fig.1 No. ① ② ③ ④ ⑤ Name Motor Fan blade Electric box DC Inverter Multi VRF System GMV-60WL/A-T(U) assembly Gas pipe valve Liquid pipe valve 3
DC Inverter Multi VRF System 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 Min sets of connectable IDUs Max sets of connectable IDUS GMV-36WL/A-T(U) 2 7 GMV-48WL/A-T(U) 2 8 GMV-60WL/A-T(U) 2 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℃(23℉~118℉) Heating Outdoor temperature: -20℃～27℃(-4℉~81℉) 3 Preparation before Installation NOTICE! Graphics here are only for reference. Please refer to actual products. 3.1 Standard Parts Please use the supplied standard parts as required. No. Name Appearance Qty Remark 1 User Manual resistance) 1 Must be connected to the last IDU of communication 2 Wiring (match with 3 Corrugated pipe 1 GMV-36WL/A-T(U) GMV-48WL/A-T(U) 4 Liquid side connection pipe 1 This part is included in the 5 Gas side connection pipe Parts for Outdoor Unit 1 connection following models: GMV-60WL/A-T(U) 1 This part is included in the following models: GMV-60WL/A-T(U) 4
No. Name Appearance Qty Remark 6 Drainage hole cap 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 the following figures for space dimension: DC Inverter Multi VRF System Parts for Outdoor Unit 3 5
DC Inverter Multi VRF System Fig.2 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) 6
4 Installation Instruction NOTICE! 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: Unit:mm(inch) Model A B C D E GMV-36WL/A-T(U) GMV-48WL/A-T(U) GMV-60WL/A-T(U) 940 (37) DC Inverter Multi VRF System Fig.3 900 (35-3/8) 340 (13-3/8) 1345 (53) 572 (22-1/2) 378 (15) 320 (12 3/5) 1430 (56 2/7) 632 (24 7/8) 350 (14 7/8) 7
DC Inverter Multi VRF System 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.4 8
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 the figure below: NOTICE! Equivalent length of one Y-type branch is 0.5m(1-5/8feet). Fig.5 Allowable Length and Height Difference of Connection Pipe Piping parameters of GMV-36WL/A-T(U)、GMV-48WL/A-T(U) 、GMV-60WL/A-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 —— 9
DC Inverter Multi VRF System 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/A-T(U) Φ15.9 (Φ5/8) GMV-48WL/A-T(U) Φ15.9 (Φ5/8) GMV-60WL/A-T(U) Φ19.05 4.2.4 Selection of Indoor Branches Select indoor branches according to the total capacity of downstream indoor units. Fig. 6 Pipe dimension Gas pipe (mm/inch) Liquid pipe (mm/inch) Φ9.52 (Φ3/8) Φ9.52 (Φ3/8) Φ9.52 (Φ3/8) (Φ3/4) Fig.7 10
Refrigerant system Total capacity of downstream indoor units C (Btu/h) Model Y type branch 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. Fig.8 Total capacity of downstream indoor units C (Btu/h) C ≤19000 Φ12.7 (Φ1/2) 19000<C≤48500 Φ15.9 Φ9.52 (Φ3/8) 48500<C≤76400 Φ19.05 DC Inverter Multi VRF System C< 68200 FQ01A/A 68200≤C≤102400 FQ01B/A 102400＜C≤238800 FQ02/A 238800＜C≤460600 FQ03/A 460600＜C FQ04/A Pipe (mm/inch) Liquid pipe (mm/inch) Φ6.35 (Φ1/4) Φ9.52 (5/8) (3/8) (Φ3/4) 11
DC Inverter Multi VRF System 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. Fig. 9 Rated capacity of IDU C(Btu/h) C≤9600 Φ9.52 (Φ3/8) 9600<C≤17000 Φ12.7 (Φ1/2) 17000<C≤48000 Φ15.9 (Φ5/8) 48000<C≤55000 Φ19.05 55000<C≤96000 Φ22.2 (Φ7/8) NOTICE! 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. 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. Gas pipe (mm/inch) Liquid pipe (mm/inch) Φ6.35 (Φ1/4) Φ6.35 (Φ1/4) Φ9.52 (Φ3/8) Φ9.52 (Φ3/8) (Φ3/4) Φ9.52 (Φ3/8) 12
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.10).
(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. 12. 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. 11 Fig. 12
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. 13. (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. 14)
DC Inverter Multi VRF System
Fig. 10
13 DC Inverter Multi VRF System
(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. 13 Fig. 14
4.3.4 Outdoor Pipe Connection
（1）Pipe connection for GMV-36WL/A-T(U)、GMV-48WL/A-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.
Pipe Diameter
Tightening Torque
6mm(1/4inch)
15-30N·m(11-22ft.-1b.)
9.5mm(3/8 inch)
35-40N·m(26-29ft.-1b.)
12.7mm(1/2 inch)
45-50N·m(33-37ft.-1b.)
16mm(5/8 inch)
60-65N·m(44-48ft.-1b.)
14
Fig. 15
（2）Pipe connection for GMV-60WL/A-T(U)
As shown in Fig.16 and Fig.17, 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. 16
15 DC Inverter Multi VRF System
Fig. 17
4.3.5 Installation of Y-type Branch
(1) Y-type Branch
(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. 19.
(3) Y-type branch must be installed vertically or horizontally.
Fig. 18
Fig. 19
16 Branch shall be isolated by insulating material that can bear 120℃(248℉)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. 20. 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℃(158℉) or above and gas pipe should bear 120℃(248℉) or above. For cooling only unit, both liquid pipe and gas pipe should bear 70℃(158℉) 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. 21. DC Inverter Multi VRF System Fig. 20 17
DC Inverter Multi VRF System When installing the unit, metal pieces for transportation must be removed. （except for GMV-60WL/A-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. 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 below. Fig. 21 Fig. 22 18
DC Inverter Multi VRF System 4.5.2 Refrigerant Adding (1) Refrigerant quantity of outdoor unit before delivery: Model GMV-36WL/A-T(U) GMV-48WL/A-T(U) GMV-60WL/A-T(U) 6.5 （229） Refrigerant Qty (kg/oz) 5.0 (176) 5.0 (176) (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 Calculation method of the quantity of additional refrigerant (based on liquid pipe) Quantity of additional refrigerant = ∑length of liquid pipe X quantity of additional refrigerant per meter(39-3/8inch) Diameter of Φ22.2 (Φ7/8) Φ19.05 Φ15.9 (Φ5/8) Φ12.7 (Φ1/2) Φ9.52 (Φ3/8) Φ6.35 (Φ1/4) liquid pipe (mm/inch) (Φ3/4) kg/m 0.35 0.25 0.17 0.11 0.054 0.022 oz/inch 0.314 0.224 0.152 0.099 0.048 0.020 NOTICE! Liquid pipe that is within 20m(65-5/8feet) doesn’t need to be added with refrigerant. 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. (3) Calculation example Fig. 23 19
DC Inverter Multi VRF System IDU No. IDU ① IDU ② IDU ③ IDU ④ Model Duct type GMV-ND18PLS/A-T(U) Duct type GMV-ND12PLS/A-T(U) Duct type GMV-ND09PLS/A-T(U) Duct type GMV-ND09PLS/A-T(U) Liquid pipe: No. A B C D Pipe size Φ9.52mm (Φ3/8inch) Φ9.52mm (Φ3/8inch) Φ9.52mm (Φ3/8inch) Φ6.35mm (Φ1/4inch) Length 10m (32-3/4feet) 5m (16-3/8feet) 5m (16-3/8feet) 5m (16-3/8feet) No. a b c d Pipe size Φ9.52mm (Φ3/8inch) Φ6.35mm (Φ1/4inch) Φ6.35mm (Φ1/4inch) Φ6.35mm (Φ1/4inch) Length 3m (9-3/4feet) 3m (9-3/4feet) 2m (6-5/8feet) 1m (3-1/4feet) Total length of each liquid pipe Φ9.52：A+B+C+a=10+5+5+3=23m(75-1/2 feet) Φ6.35: D+b+c+d=5+3+2+1=11m(36feet) NOTICE! Liquid pipe that is within 20m(65-5/8 feet) doesn’t need to be added with refrigerant. Therefore, the minimum quantity of additional refrigerant = (23-20)×0.054+11×0.022＝ 0.404kg(14oz) 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.24) 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. 20
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. 25) 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. 25) DC Inverter Multi VRF System Fig. 24 Fig. 25 Fig. 26 21
DC Inverter Multi VRF System (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. 26) (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 Communication wire between ODU and IDU Indoor unit communication wire Indoor unit communication wire Wire(resistance- matching) D1 D2 G1 G2 D1 D2 H1 H2 D1 D2 H1 H2 D1 D2 H1 H2 Outdoor Indoor Indoor Indoor unit unit 2 unit N unit 1 L N L N L N L N Remote Wired controller Wired controller Wired controller monitor Power Power Power Power Fig.27 Connection of power cord and communication wire for IDU and ODU (2) The wiring diagram for power cord of outdoor unit and communication wire. 22
There are two wiring diagrams for communication wires of indoor/outdoor units and remote monitor: 1.Real line method; 2. Broken line method. Please select it based on the actual installation situation. There are two wiring diagrams for power cord: 1.Real line method; 2.Broken line method. Please select it based on the actual installation situation. (3) Selection of air switch and power cord: Model Power supply GMV-36WL/A-T(U) 208/230V~ 60Hz 35 35 31 GMV-48WL/A- T(U) 208/230V~ 60Hz 45 45 34 GMV-60WL/A- T(U) 208/230V~ 60Hz 60 60 39.8 (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℃(104℉) and multi-core copper cable (working temperature is 90℃(194℉), 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℃(104℉). If working condition changes, please adjust the specification according to national standard. DC Inverter Multi VRF System Fig.28 Max Fuse Size/Fusible Max Ckt, Bkr Size/Disjoncteur Max. Min. Circuit Ampacity Max. (A) (A) (A) 23
DC Inverter Multi VRF System 4.6.3 Engineering wiring of power supply and communication cable （1）Please refer Fig. 29 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. Fig. 29 Engineering Wiring View of GMV-36WL/A-T(U), GMV-48WL/A-T(U) and GMV-60WL/A- T(U) 24
5 Check Items after Installation and Test Operation 5.1 Check Items after Installation Check items Possible conditions due to improper 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. 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 fts 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. DC Inverter Multi VRF System installation Check 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. 25
DC Inverter Multi VRF System (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 Progress code Status code LED1 LED2 LED3 Code meaning and operation method Progress Code Display status Code Display status Code Display status db On 01 On AO On System is not debugged. Hold main board’s SW7 button for 5s to start debugging. Main board will display as said in the left. 2s later, next step starts. 01_ Set master unit db On 01 On OC On db On 02 On Ad Blink 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. 02_ Allocate addresses db On 02 On L7 Blink db On 02 On OC On Allocation is finished. 2s later, next step starts. db On 03 On 01 Blink System is confirming. 1s later, next step starts. 03_ Confirm the quantity of ODU db On 03 On OC On System finishes confirmation. 2s later, next step starts. LED3 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 SW7 button to confirm. Then the display is as below: db On 04 On 01~80 Blink 04_ Confirm the quantity of IDU db On 04 On OC On System has confirmed the quantity. 2s later, next step starts. 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. db On 05 On C2 On 05_ Detect ODU’s internal communication and capacity ratio 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, than next step will start 2s later. If the ratio is out of range, unit will display as below: db On 05 On OC On 26
DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Progress code Status code LED1 LED2 LED3 Code meaning and operation method Progress Code Display status Code Display status Code Display status 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. db On 05 On CH On 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. db On 05 On CL On Outdoor component’s error. LED3 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. db On 06 On error code On 06_ outdoor components db On 06 On OC On System detects no error on outdoor component. 10s later, next step starts. System detects error on indoor components. XXXX means the project code of IDU with error. 3s later, related error code will be showed. For instance, if no.1 IDU has d6 and d7 errors, then the LED3 digital tube will show circularly 00,01,d5,d6,07,92,d6,d7 every 2s. 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. db On 07 On Error code On 07_ Detect indoor components db On 07 On OC On No error on components of IDU. 2s 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 SW7 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) db On 08 On UO On 08_ Confirm preheated compressor db On 08 On OC On Compressor has been preheated for 8 hours. 2s later, next step starts. 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_ Refrigerant judgments before startup db On 09 On U4 On db On 09 On OC On Refrigerant is normal and unit will display as in the left for 2s. Then next 27
DC Inverter Multi VRF System Description of each stage of debugging progress —— Debugging code Progress code Status code LED1 LED2 LED3 Code meaning and operation method Progress Code Display status Code Display status Code Display status 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: db On 10 On ON On Outdoor valves are not fully turned on. Press main board’s SW6 button and display shows “db 09 OC”. Then check if the gas and liquid valves of ODU are completely open. After confirmation, press the SW6 button again. Then compressor will start running for about 2min to inspect the status of valves. 10_ Status judgments of outdoor valves before startup db On 10 On U6 On Valves status is normal. Unit will display as in the left for 2s and then start next step. db On 10 On OC On Ready for units to start debugging. Press main board’s SW7 button to confirm startup of debugging. 2s later, main board will display as below: db On 12 On AP Blink 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 db On 12 On AE On Debugging for cooling mode. If no malfunction occurs for 20min when compressor is running, then system will start progress 17; If malfunction occurs, unit will display as below: db On 15 On AC On 15_ Cooling debugging Malfunction occurs when debugging for cooling mode. After all malfunctions are eliminated, system will start next step. db On 15 On Error code On Debugging for heating mode. If no malfunction occurs for 20min when compressor is running, then system will start progress 17; If malfunction occurs, unit will display as below: db On 16 On AH On 16_ Heating debugging Malfunction occurs when debugging for heating mode. After all malfunctions are eliminated, system will start next step. 17_ Debugging finished db On 16 On Error code On 00 On AC/AH On OFF On The entire unit has finished debugging and under standby-by condition. 28
DC Inverter Multi VRF System 5.2.3 Appendix: Reference of normal operation parameters No. Debug item Parameter name Unit Reference Outdoor temperature ℃(℉) —— 1 ●When compressor starts, discharge temp in cool mode is within 70~105℃(158~221℉) and at least 10℃(50℉) higher than the high pressure saturation temp; ●As for temp in heat mode, it is within 65~90℃(149~194℉) and at least 10℃(50℉) higher than the high pressure saturation temp. 2 Compressor discharge temp ℃(℉) ●In cool mode, defrosting temp is 4~10℃ (39~50℉) lower than system’s high pressure value; ●In heat mode, defrosting temp is about 2℃ (36℉) different from system’s low pressure value. 3 Defrosting temp ℃(℉) ●In cool mode, the normal high pressure value is within 20℃~55℃(68~131℉). According to the change of ambient temp and system’s operating capacity, the high pressure value will be 10℃~30℃(50~86℉) higher than ambient temp. The higher ambient temp is, the smaller temp difference is. If ambient temp is 25~35℃(77~95℉) in cool mode, system’s high pressure value will be within 44~53℃(111~127℉). ●In heat mode, if ambient temp is above -5℃ (23℉), system’s high pressure value is within 40~52℃(104~126℉). If ambient temp is low and many IDUs are turned on, the high pressure will be lower. 4 System high pressure ℃(℉) ODU parameters System parameters ●When ambient temp in cool mode is 25~35℃(77~95℉), the low pressure value is 0~8℃(32~46℉). ●When ambient temp in heat mode is above -5℃(23℉), the low pressure value is -15~8℃ (5~46℉). 5 System low pressure ℃(℉) ●In cool mode, the thermal electronic expansion valve remains 480PLS. ●In heat mode, the adjustable opening angle of EXV is 60~480PLS. 6 Opening angle of thermal EXV PLS GMV-36WL/A-(U) GMV-48WL/A-(U) Changes in 10Hz~80Hz. 7 Compressor’s operating freq HZ GMV-60WL/A-(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℃(95℉), IPM temp is lower than 80℃(176℉) and the highest temp won’t be above 95℃(203℉). 9 Compressor’s IPM temp ℃(℉) Changes in 0~49Hz according to system’s pressure. GMV-36WL/A-(U) GMV-48WL/A-(U) 10 Fan motor’s operating freq HZ Changes in 0~40Hz according to system’s pressure. 11 IDU IDU ambient temp ℃(℉) —— GMV-60WL/A-(U) 29
DC Inverter Multi VRF System No. Debug item Parameter name Unit Reference 12 parameters 13 14 Opening angle of 15 Communication parameters Communication 16 Drainage system —— — Compressor and indoor/outdoor fan motor do not have strange noise. Unit can operate normally. 6 Common Malfunctions and Troubleshooting 17 Others —— — (1) If there is abnormal condition (e.g. unpleasant smell), turn unit off and disconnect power immediately. Then contact Gree authorized service center. If unit continues operation despite the abnormal condition, it may get damaged and lead to electric shock or fire hazard. (2) Do not repair the air conditioner by yourself. Improper maintenance may lead electric shock or fire hazard. Please contact Gree authorized service center for maintenance ●According to ambient temp, for a same IDU in cool mode, the inlet temp will be 1℃~7℃ (34~45℉) lower than the outlet temp, and 4~9℃(39~48℉) higher than the low pressure value. ●For a same IDU in heat mode, the inlet temp will be 10℃~20℃(50~68℉) lower than the outlet temp. Indoor heat exchanger’s inlet ℃(℉) temp ●In cool mode, the opening angle of indoor EXV varies within 70~480PLS. ●In heat mode, the opening angle of indoor EXV varies within 70~480PLS. GMV-36WL/A-(U) GMV-48WL/A-(U) indoor EXV PLS ●In cool mode, the opening angle of indoor EXV varies within 70~480PLS. ●In heat mode, the opening angle of indoor EXV varies within 40~480PLS. GMV-60WL/A-(U) Number of IDUs detected by software is the same with the actual number. No communication error. data — 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. 30
●Please check the items below before calling for maintenance. Problems Causes What to do Fuse or circuit breaker is cut off. Replace fuse or reset the circuit breaker. Power failure Restart unit when power is restored. Power is not connected. Connect the power. Remote controller’s power is not enough Replace new battery. Unit doesn’t work. Remote controller is out of the control range. Control range is within 8m(26feet). Unit runs but stops Air inlet or air outlet of indoor and outdoor units is blocked. Clear obstructions. immediately. Air inlet or air outlet of indoor and outdoor units is blocked. Clear obstructions. Improper temp setting Adjust setting at remote controller or wired controller Fan speed is set too low. Adjust setting at remote controller or wired controller Abnormal cooling or Wind direction is not correct. Adjust setting at remote controller or wired controller Door or window is open. Close the door or window. Direct sunshine Draw curtain or louver. Too many people in the room. Too many heat resources in the room. Reduce heat resources. Filter is blocked and dirty. Clean the filter NOTICE! 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. Malfunction Reason heating Overload protection switch makes it run after a 3-min delay. Power is just turned on. Standby operation lasts for about 1min. Mist comes from Unit starts up immediately after it is turned off. Unit doesn’t run. the unit. Under cooling Indoor air with high humidity is cooled rapidly. Slight cracking sound is heard when unit is just turned on. It is the noise when electronic expansion valve is initialized. There is consecutive sound when cooling. There is sound when unit starts or stops. It is the sound when gas refrigerant stops flowing. There is slight and consecutive sound when unit is running or after running. This is the sound of drainage operation. Noise is emitted. This is the sound caused by the expansion of panel and other parts of the unit due to temperature change. Unit blows out Cracking sound is heard when unit is running or after running. Unit starts up after not operating for a long time. Dust in indoor unit is blown out. dust. Unit emits odor. Under operation Unit absorbs the room odor and then blows it out. DC Inverter Multi VRF System It is the sound for gas refrigerant flowing in the unit. 31
DC Inverter Multi VRF System 7 Error Indication Inquiry method of error indication: combine division symbol and content symbol to check the corresponding error. For example, division symbol L and content symbol 4 together means over-current protection. Content symbol Division symbol 0 1 2 3 4 5 Auxiliary Freeze prevention L Malfunction of Protection of Water-full protection Over-curren heating protection IDU (uniform) indoor fan t protection protection Indoor Malfunction Malfunction Malfunction of entry-tube temperature d Indoor PCB of ambient temperature of middle temperature is poor sensor sensor sensor High discharge temperature Discharge low-temperatur E Malfunction of ODU (uniform) High-pressur Low-pressur e protection e protection protection e protection of compressor Malfunction of discharge temperature Malfunction Malfunction F Main board of of high-pressur of low-pressure ODU is poor sensor of compressor e sensor sensor 1 Over-current protection of compressor 1 Outdoor J Malfunction Malfunction Malfunction Malfunction of of outdoor of liquid temperature of gas temperature defrosting temperature b ambient temperature sensor of sub-cooler sensor of sub-cooler sensor 1 sensor Driving board Voltage protection of driving board Reset protection of malfunction of of compressor Drive PFC Over-curren driving board of compressor protection t protection P driving module of compressor operates abnormally power of compressor of compressor of inverter compressor (uniform) (uniform) (uniform) Wrong setting Wrong address for Preheat time of of ODU’s U compressor is capacity code/jumper driving board of compressor insufficient cap Debuggin Communication Communicatio g malfunction between main Alarm because project code n malfunction between IDU, Malfunction C control and of lack of ODU and IDU’s wired inverter compressor IDU of IDU is inconsistent controller driver 32
DC Inverter Multi VRF System Content symbol Division symbol 0 1 2 3 4 5 Inquiry of compressor A Unit waiting for Defrosting Oil-return Online test debugging operation parameters Setting of upper Status limit of IDU/ODU SE operation Setting of defrosting n setting of capacity distribution system cycle K1 ratio Content symbol Division symbol 6 7 8 9 A H 1-to-more: IDU series is inconsisten t Alarm due to bad air quality (Fresh air unit) 1-to-more: number of IDU is inconsistent L Mode shock No main IDU Power supply is insufficient Malfunction of exit-tube temperature sensor Web address of IDU is abnormal Malfunction of humidity sensor PCB of wired controller is abnormal Malfunction of jumper cap d High pressure ratio protection of system Protection due to abnormal pressure Gas-mixing protection of 4-way valve J Indoor Malfunction of inlet temp sensor of gas-liquid separator Malfunction of outlet temp sensor of gas-liquid separator Malfunction of heat exchanger temperature sensor Clock of system is abnormal b Malfunction of drive temperature sensor of compressor Drive IPM high temperature protection of compressor High-voltage protection of compressor’ s drive DC bus bar Drive IPM module protection of compressor Desynchronizin g protection of inverter compressor P Alarm because valve is abnormal Short-circuit malfunction of IDU Malfunction of pipe-line for ODU U Debuggin g Rated capacity is too high C Heat pump function setting EU AA level EER test mode Quiet mode setting Vacuum pump mode IPLV test A Heating Status Engineerin g No. inquiry of indoor unit Malfunctio n inquiry of unit Paramete r inquiry of unit Heat pump unit Heating only unit n 33
DC Inverter Multi VRF System Content symbol Division symbol C L E F J P Models for IDU and ODU are not matched L Malfunction of air-outlet temperature sensor(Fresh air unit) Abnormal setting for capacity button Malfunction of indoor CO2 sensor (fresh air unit) d Drop protection of discharge temperature sensor of compressor 1 E Indoor F Malfunction of DC motor J High-pressure protection Drive current detection circuit malfunction of compressor Drive charging circuit malfunction of compressor Low-voltage protection of compressor’s drive DC bus bar Failure startup of inverter compressor AC current protection of inverter compressor Phase-lacking of inverter compressor P Drive current detection circuit malfunction of fan Drive charging circuit malfunction of fan Low-voltage protection of fan’s drive DC bus bar Failure startup of inverter fan AC current protection of inverter fan Phase-lacking of inverter fan H Setting of main IDU is successful Charging of refrigerant is invalid Wrong button-dial U Debugging Malfunction of lack of main control unit Malfunction of multiple main control units Malfunction of multiple main wired controllers Malfunction of multiple main wired controllers Rated capacity is too low C Debugging confirmation for startup of unit Charging refrigerant automatically Charging refrigerant manually Alarm for cleaning filter A Cooling Fan Status n Cooling only unit Negative sign code Fan model 34
DC Inverter Multi VRF System Content symbol Division symbol U b d n y Communication malfunction between IDU and the receiving lamp Overflow distribution of Debugging C IP address plate Emergency Status A Long-distance emergency stop stop of operation Limit operation 8 Function Setting of Outdoor Unit When debugging is finished, press SW3 on the master unit and unit will be ready for function setting. Default display of outdoor unit’s main board is as below: LED1 LED2 LED3 Function code Display Current progress Display Current status Display A7 Blink 00 Blink 00 Blink Then press SW1 button(▲) and SW2 button(▼) on the master unit to switch function codes of LED1 to select relevant functions. Function setting includes: outdoor silent mode setting (A7), heating and cooling function setting (A6), compulsory defrosting (n3) After selecting relevant functions, press SW7 to confirm and start setting this function. Main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Display Current progress Display Current status Display A7 On 00 Blink oC Blink A6 On CH Blink CH Blink n3 On 35 Blink oC Blink 8.1 ODU Quiet Function This function is suitable for projects that have strict requirements for noise. It includes two modes: smart night silent mode, compulsory silent mode. When unit enters function setting, main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Display Current progress Display Current status Display A7 On 00 Blink oC Blink Press SW1 button (▲) and SW2 button (▼) to select the following silent modes. LED1 LED2 LED3 Function code Silent mode Display Current status Display A7 00~12 Blink oC Blink When applicable mode is selected, press SW7 to confirm. Main board of outdoor unit will display as below: 35
DC Inverter Multi VRF System LED1 LED2 LED3 Function code Silent mode Display Current status Display A7 00~12 On oC On Notice: code 00 of LED2 refers to normal mode. Codes 01~09 refer to smart night silent mode. Codes 10~12 refer to compulsory silent mode. When setting is finished, master unit will memorize it so that it can’t be cancelled even when power is on or off. Then press SW6 on the master unit to return to the previous step. (If this button is pressed when function is being set, system will return to the previous step. If SW6 is pressed when setting is finished, system will resume displaying the current operation status.) If then no motion is taken to the master unit for 5min, unit will exit and resume displaying the current status. 8.2 Cool & Heat Function This function can set operation modes and prevent mode collision that is caused by setting different modes for different indoor units. It is especially suitable for hotels and other small business areas. There are 3 levels for this setting: Level A—Mode Lock Control Upon entering this function setting, main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Current progress Display Current status Display A6 nC Blink nC Blink Press SW1 button (▲) and SW2 button (▼) to select the following functions: LED1 LED2 LED3 Function code Display Current progress/mode Display Current status Display A6 On nC Blink nC Blink A6 On nH Blink nH Blink A6 On nA Blink nA Blink A6 On nF Blink nF Blink When applicable mode is selected, press SW7 to confirm. The related display is as below: LED1 LED2 LED3 Function code Display Current progress/mode Display Current status Display A6 On nC On nC On A6 On nH On nH On A6 On nA On nA On A6 On nF On nF On This setting will be memorized by master unit and can’t be cancelled even when power is on or off. Then press SW6 on the master unit to return to the previous step. If then no motion is taken to the master unit for 5min, unit will exit and resume displaying the current status. (If this button is pressed when function is being set, system will return to the previous step. If SW6 is pressed when setting is finished, system will resume displaying the current operation status.) 36
Default setting is “nA” cooling and heating type. Level B—IDU Mode Auto Control When Level A is disabled or outdoor unit is set to be cooling and heating type, the operation mode within one system depends on the master-salve setting of indoor units. 8.3 Forced Defrosting This function can only be set when outdoor compressor is running. Upon entering this function, main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Display Current progress/mode Display Current status Display n3 On 00 Blink 00 Blink Press SW7 to confirm. When system enters this function, main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Display Current progress/mode Display Current status Display n3 On 00 On 00 On Then unit will be in compulsory defrosting mode. Once unit is under compulsory defrosting, this mode can only be stopped when requirements for exit are met. 8.4 Restore Factory Defaults (1) If you want to restore factory defaults, hold SW8 button on the main board of ODU for more than 10s, then all LEDs will blink for 3s. Main board will cancel all setting, including the IP addresses and project codes of IDU and ODU. The mark for finished debugging is “0”. (2) If you want to restore factory defaults and don’t need project debugging, then hold SW3 and SW8 on the main board of ODU for more than 10s, then all LEDs will blink for 5s. All settings are cleared out, including the IP addresses and project codes of IDU and ODU. The mark for finished debugging remains the same. (3) When you only want to restore the default functions, hold SW5 and SW8 button for more than 10s, then all LED will blink for 7s. All function settings are cleared out, but IDU and ODU’s project codes and the mark for finished debugging remain the same. 8.5 Static Pressure Function If ODU’s installation area is not convenient for releasing air and users do not have strict requirements for ODU noise, this function can be set to satisfy the heat exchange of ODU. Before power on, set codes of SA6 of main board. The relevant static pressure is: Code setting SA6 Static pressure (Pa) DIP1 DIP2 0 0 0 1 0 20 Note: code of number side is “1”; default code of SA6 is “00”. DC Inverter Multi VRF System 37
DC Inverter Multi VRF System 9 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. 9.1 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. 9.2 Drain Pipe Please check regularly whether drain pipe is blocked or not. Make sure condensate can be drained out smoothly. 9.3 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. 9.4 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. 9.5 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. 38
10 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
39 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 66174100058