Gree GMV-1015WM/H-X Owner'S Manual Download Page 12

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GMV DC Inverter VRF

2.4 Product Working Principle

2.4.1 Working Principle Introduction

The outdoor unit of GMV6 multi VRF unit can be realized by parallel combination of modules, and

the indoor unit can also be composed of multiple units in parallel. The working principle is as follows:

when the indoor unit is running in the cooling mode, the outdoor unit starts the outdoor module

according to the running load demand of the indoor unit. The outdoor heat exchanger is used as the

condenser of the system, and the heat exchangers of indoor units are connected in parallel as the

evaporator of system. It realizes the adjustment of the air temperature and humidity for indoor space

through the return air circulation of the indoor unit; when the indoor unit is in the heating mode, all the

four-way valves of the outdoor unit module are switched to the energizing state, the outdoor heat

exchanger is used as the evaporator of the system and the heat exchanger of indoor unit is used as

the condenser of the system. The air temperature and humidity in the indoor space is realized by the

return air circulation of the indoor unit.

2.4.2 Working principle Diagram

System principle diagram of GMV-224WM/H-X , GMV-280WM/H-X , GMV-335WM/H-X

Fig. 2.4.1

Summary of Contents for GMV-1015WM/H-X

Page 1: ...Owner s Manual Original Instructions Commercial Air Conditioners GMV DC Inverter VRF Models GMV 224WM H X GMV 280WM H X GMV 335WM H X GMV 2460WM H X ...

Page 2: ... Please properly select the model according to actual using environment otherwise it may impact the using convenience 4 This product has gone through strict inspection and operational test before leaving the factory In order to avoid damage due to improper disassembly and inspection which may impact the normal operation of unit please do not disassemble the unit by yourself You can contact with th...

Page 3: ...cturer 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...

Page 4: ...efrigeration System 35 3 7 Additional refrigerant charging 37 3 8 Electrical Installation 42 3 9 Communication Line Connection 47 3 10 Check Items after Installation 52 4 Debugging and Operation 53 4 1 Preparation before Test Run 53 4 2 Notices for Unit Debugging 54 4 3 Basic Introduction for Engineering Debugging 57 4 4 Parameter Judgment Reference Value for Unit Normal Operation 64 5 Operation I...

Page 5: ...r conditioner complying with partial unit requirements of this International Standard and must only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of this International Standard l 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 ...

Page 6: ...plosion and affect the health of people l Disposal of packaging transportation materials and other parts must comply with the relevant regulations of the local country NOTES l 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 l Turn off the unit after it runs at least five minutes otherwise ...

Page 7: ...se it will cause electric shock l Do not modify the unit protection settings If a pressure switch end switch or other protective device is short circuited and forced to operate it may cause a fire or explosion l When installing the unit make sure that the connection pipe is securely connected before starting up the compressor If the compressor is started up before the connection of the connecting ...

Page 8: ...cord l Do not insert fingers or objects into air outlet inlet grille l Do not operate this unit with wet hands l Never short circuit or cancel the pressure switch to prevent unit damage l Never fail to comply with the nitrogen charge requirements Charge nitrogen when welding pipes l Never spray or flush water towards unit otherwise malfunction or electric shock may happen l Never allow children to...

Page 9: ...used in working area and especially applicable to the place with variable load change 2 2 Product List 2 2 1 Combinations of Outdoor Units Model GMV 224W M H X GMV 280W M H X GMV 335W M H X GMV 400W M H X GMV 450W M H X GMV 504W M H X GMV 560W M H X GMV 615W M H X GMV 224WM H X GMV 280WM H X GMV 335WM H X GMV 400WM H X GMV 450WM H X GMV 504WM H X GMV 560WM H X GMV 615WM H X GMV 680WM H X GMV 730WM...

Page 10: ...H X GMV 1345WM H X GMV 1400WM H X GMV 1455WM H X GMV 1510WM H X GMV 1565WM H X GMV 1630WM H X GMV 1680WM H X GMV 1734WM H X GMV 1790WM H X GMV 1845WM H X GMV 1905WM H X GMV 1959WM H X GMV 2015WM H X GMV 2070WM H X GMV 2125WM H X GMV 2180WM H X GMV 2245WM H X GMV 2295WM H X GMV 2349WM H X GMV 2405WM H X GMV 2460WM H X NOTE u means a basic module ...

Page 11: ... X 80 GMV 784WM H X 46 GMV 1959WM H X 80 GMV 840WM H X 50 GMV 2015WM H X 80 GMV 895WM H X 53 GMV 2070WM H X 80 GMV 950WM H X 56 GMV 2125WM H X 80 GMV 1015WM H X 59 GMV 2180WM H X 80 GMV 1065WM H X 63 GMV 2245WM H X 80 GMV 1119WM H X 64 GMV 2295WM H X 80 GMV 1175WM H X 64 GMV 2349WM H X 80 GMV 1230WM H X 64 GMV 2405WM H X 80 GMV 1290WM H X 64 GMV 2460WM H X 80 GMV 1345WM H X 64 2 The total capacity...

Page 12: ... exchangers of indoor units are connected in parallel as the evaporator of system It realizes the adjustment of the air temperature and humidity for indoor space through the return air circulation of the indoor unit when the indoor unit is in the heating mode all the four way valves of the outdoor unit module are switched to the energizing state the outdoor heat exchanger is used as the evaporator...

Page 13: ...GMV DC Inverter VRF 9 System principle diagram of GMV 400WM H X GMV 450WM H X Fig 2 4 2 ...

Page 14: ...or humidity 80 When the indoor units are all VRF fresh air processor the unit operating range is as follows Cooling Ambient temperature 16 45 Heating Ambient temperature 7 16 NOTE If exceeding the temperature range for working the product may be damaged which is not within the warranty range 2 6 Standard Parts Please use the following standard parts supplied by Gree Parts for Outdoor Unit Number N...

Page 15: ...d valve When the pressure gauge reads 0 0 05MPa completely close the low pressure side valve air valve and then immediately stop operation and cut off the power 6 When recovering the refrigerant it is necessary to ensure that the connection pipe can be disassembled only after the liquid valve and the air valve are completely closed and the power is turned off If disassembling the connection pipe w...

Page 16: ...Outdoor Unit Installation 3 2 1 Product Size Drawing The product photos are only for reference Please refer to the actual product Outline and Physical Dimension of GMV 224WM H X GMV 280WM H X GMV 335WM H X unit Unit mm Fig 3 2 1 ...

Page 17: ...GMV 335WM H X Gas pipe Φ19 05 Φ22 2 Φ25 4 Liquid pipe Φ9 52 Φ9 52 Φ12 7 Pipe and wiring passing hole L W 196 69 196 69 196 69 Hoist hole Φ50 Φ50 Φ50 Outline and Physical Dimension of GMV 400WM H X GMV 450WM H X GMV 504WM H X GMV 560WM H X GMV 615WM H X unit Unit mm Fig 3 2 2 ...

Page 18: ...haust gases should be avoided 4 Ensure that there is a certain space for heat exchanging and maintenance so that the ventilation is smooth and the running is reliable 5 Outdoor units and indoor units should be as close as possible to minimize the length and angle of the cooling pipes 6 Do not allow children to approach the unit Preventive measures should be taken to prevent children from contactin...

Page 19: ...installation locale Fig 3 2 3 2 Anti monsoon installation requirements for unit connecting exhaust duct Fig 3 2 4 3 2 2 2 Take Snow into Consideration When Installing the Outdoor Unit When the unit is installed the snow should be taken into consideration for the height of the base ...

Page 20: ...GMV DC Inverter VRF 16 NOTE The photo is only for reference Please refer to the installation locale Fig 3 2 5 ...

Page 21: ...the maintenance space of the unit and the ventilation of the unit Select an installation method according to the actual situation Fig 3 2 6 Unit mm Status A B C D A B Status 1 a 300 b 100 c 100 d 500 a 300 b 300 Status 2 a 300 b 100 c 100 d 500 e 100 a 300 b 300 e 400 Status 3 a 300 b 100 c 100 d 500 e 200 f 600 ...

Page 22: ...suction side should be increased 2 When disassembling or installing the unit the operation may be affected by obstacles and the distance from the unit to the wall surface may be appropriately increased 3 When two or more units are installed and placed the operation may be affected by the adjacent units The distance between the two adjacent units is e 100mm Unit mm Fig 3 2 7 4 When the unit is inst...

Page 23: ...e top of the unit is required to be 1500mm or more from the top wall as shown in the fig as below If the size is less than 1500mm or if the space around the unit is not open you need to connect an exhaust duct for smooth ventilation as shown below Unit mm Fig 3 2 9 3 2 4 Installation Space Requirements for Equipment Floor When the outdoor unit is installed in the equipment floor it needs to connec...

Page 24: ...height of the foundation so that the air inlet side is not buried by snow 2 Build a drainage ditch around the foundation to discharge the condensate water 3 If the air conditioner is installed on the roof check the intensity of the building and take waterproof measures 4 If a u steel foundation is adopted the structure must be designed with sufficient rigidity and strength 5 Cement foundation diag...

Page 25: ...leaving sufficient maintenance space 5 The vertical pipe should be laid in the air conditioning pipe well The horizontal pipe should be laid in the ceiling 3 3 2 Pipeline Requirement Pipe specification is shown as follows R410A Refrigerant System External diameter mm Thickness mm Type Φ6 35 0 8 O Φ9 52 0 8 O Φ12 70 0 8 O Φ15 9 1 0 O Φ19 05 1 0 1 2H Φ22 2 1 2 1 2H Φ25 40 1 2 1 2H Φ28 60 1 2 1 2H Φ3...

Page 26: ... the first branch to the nearest IDU Equivalent length of branch of IDU is 0 5m Length m Fitting Pipe Total length actual length of fitting pipe 1000 L1 L2 L3 L4 L9 a b i j Length of farthest fitting pipe m Actual length 200 L1 L6 L7 L8 L9 j Equivalent length 240 Equivalent length from the first branch to the furthest indoor unit 1 120 L6 L7 L8 L9 j Height difference between outdoor unit and indoo...

Page 27: ... 40m the liquid pipe size from the ODU to the first manifold of IDU must be enlarged 3 When the height drop among IDUs is more than 15m the liquid pipe size from the ODU to the first manifold of IDU must be increased 4 When the maximum length of the main pipe from ODU to the first branch of IDU is 90m then adjust the pipe size of the gas pipe and liquid pipe of main pipe according to the following...

Page 28: ...Φ51 4 Φ25 4 GMV 2295WM H X Φ51 4 Φ25 4 GMV 2349WM H X Φ51 4 Φ25 4 GMV 2405WM H X Φ51 4 Φ25 4 GMV 2460WM H X Φ51 4 Φ25 4 5 If the liquid pipe is enlarged for a situation from 2 4 please do not enlarged any more 6 If the length between an IDU and its nearest branch is above 15m then increase the size of the liquid pipe only for the pipe size that is 6 35mm and gas pipe only for the pipe size that is...

Page 29: ...between the outdoor units are as follows Unit m Fig 3 3 7 NOTE When the distance A B between the outdoor modules exceeds 2m U type oil trap should be added at low pressure gas pipe and is no more than 2m away from the outdoor manifold and A B 10m The height drop among the outdoor units is 0m ...

Page 30: ... on the total capacity of upstream modules Total capacity of upstream module Q kW Pipe size between manifolds Gas pipe mm Liquid pipe mm Q 25 2 Φ19 05 Φ9 52 25 2 Q 30 0 Φ22 2 Φ9 52 30 0 Q 40 0 Φ25 4 Φ12 7 40 0 Q 45 0 Φ28 6 Φ12 7 45 0 Q 68 0 Φ28 6 Φ15 9 68 0 Q 96 0 Φ31 8 Φ19 05 96 0 Q 135 0 Φ38 1 Φ19 05 135 0 Q 186 0 Φ41 3 Φ19 05 186 0 Q Φ44 5 Φ22 2 Basic module Pipe between ODU and the first branc...

Page 31: ...anifold should be matched with fitting pipe of indoor unit Rated capacity of indoor unit C kW Pipe between indoor branch and IDU Gas pipe mm Liquid pipe mm C 2 8 Φ9 52 Φ6 35 2 8 C 5 0 Φ12 7 Φ6 35 5 0 C 14 2 Φ15 9 Φ9 52 14 2 C 25 2 Φ19 05 Φ9 52 25 2 C 30 0 Φ22 2 Φ9 52 30 0 C 40 0 Φ25 4 Φ12 7 40 0 C 45 0 Φ28 6 Φ12 7 6 Select the branch of outdoor module Model Select the branch of outdoor module ML01...

Page 32: ...arden Do not bend or stretch the pipe over three times at the same position 5 Please use a torque wrench to connect union nut on the indoor unit See the Fig 3 4 1 as below Fig 3 4 1 1 Align the expansion end of copper pipe with the center of threaded joint Tighten the flare nuts with your hands 2 Tighten the flare nuts with torque wrench until you hear click sound 3 Use sponge to wrap the connecti...

Page 33: ... Fig 3 4 2 b Fig 3 4 2 a Fig 3 4 2 b 2 Manifold has several pipe sections with different pipe size which facilitates to match with various copper pipe Use pipe cutter to cut in the middle of the pipe section with different pipe size See the Fig as below Fig 3 4 3 3 Y type manifold can be installed vertically or horizontally Confirm the position and then weld the manifold pipe See Fig 3 4 4 a T typ...

Page 34: ...ight pipe between the branch of the manifold and the IDU cannot be less than 500 mm Unit mm Fig 3 4 5 3 4 3 Fixation of Manifold 1 There must be three fixing point for both horizontal and vertical installation of the Y type manifold Fixing point 1 100 mm on the main inlet manifold from the welding point Fixing point 2 200 mm on the main branched pipe from the welding point Fixing point 3 250 mm on...

Page 35: ...ontal at the lower side Fig 3 4 7 3 The branches of the manifold should be parallel and should not be overlapped 4 The liquid pipe and the gas pipe should have the same pipe length and the same laying circuit Since the structure of the manifold is relatively complicated it must be rigorous and careful for heat preservation to ensure the tight insulation ...

Page 36: ...ation from the air 2 Joints at indoor and outdoor units should be wrapped with insulating material and leave no clearance between pipe and wall See Fig 3 4 8 Fig 3 4 8 3 When wrapping the tape the later circle should cover half of the former one Don t wrap the tape so tightly otherwise the insulation effect will be weakened 4 After wrapping the pipe adopt sealing material to completely fill the ho...

Page 37: ...the top cover assembly 4 indicates the canvas casing and 5 indicates the steel bar The specific operations are as below Step Photo Operation instruction Note Step 1 Select installation position for the outdoor unit and then fix it well Determine the installation position of the ventilation pipe according to the position of the outdoor unit Refer to the left figure to complete the fabrication and i...

Page 38: ... the prepared canvas casing outwards cover it from the top of the unit until the end of the canvas is flush with the unit or slightly higher than the unit ___ Step 4 Reinstall the top cover and press the canvas sleeve tightly Fasten the top cover to the unit with self tapping screws ___ ...

Page 39: ...ure gauge readings ambient temperature and test time 3 Pressure correction The temperature changes by 1 and the pressure changes by 0 01MPa 4 The pressure should remain unchanged to be qualified 5 If it is necessary to maintain pressure for a long time the pressure should be reduced to 0 5MPa or less Long periods of high pressure can cause leakage at the weld site and there is safety hazard 6 Befo...

Page 40: ...age Step 2 slowly increase the pressure to 1 5MPa stay for 5 minutes conduct the air tightness inspection and you may find small leakage Step 3 Slowly increase the pressure for R410A system to 4 15MPa stay for 5 minutes and conduct the strength test You may find small penetration or blisters After increasing the pressure to the test pressure hold the pressure for 24 hours and observe whether the p...

Page 41: ...at this operation until the water is drained 5 After vacuuming close the valve of the regulating valve and stop vacuuming for 1 hour Confirm that the pressure of the regulating valve has not risen 3 Notices for vacuum drying 1 Vacuumize it from both the gas pipe and liquid at the same time Fig 3 6 2 2 When the vacuum pump is turned off to stop vacuuming the valve should be closed at first and then...

Page 42: ...ts are mixed with the general VRF indoor units charge the refrigerant according to the refrigerant charging method of the general indoor unit For example1 Outdoor unit consists of one 28kW module and one 45kW module Five 14kW duct type units are used as indoor units IDU ODU rated capacity collocation ratio C 14 0 5 28 0 45 0 96 The quantity of included IDUs is more than 4 sets Please refer to the ...

Page 43: ...he vacuum drying work Step 2 Once vacuum drying is completed close the high pressure gauge valve and the low pressure gauge valve Disassemble the intermediate gauge pipe and the vacuum pump connection end and then connect the refrigerant tank Step 3 Properly loosen the pipe of intermediate gauge and the connection end of pressure gauge slightly open the refrigerant tank valve and empty the pipe of...

Page 44: ...to the system and the calculated added amount of refrigerant has not been fully charged into the system record current total pre charging amount m m1 m2 m3 m4 mn 1 mn Remained refrigerant for start up charging m M m M is the calculated total required refrigerant charging volume If the amount of pre charging refrigerant m has reached the total added amount of refrigerant for the system close the re...

Page 45: ...e safety requirement for preventing refrigerant leakage specified in local laws and regulations 2 Multi VRF unit adopts R410A refrigerant When the unit is installed in the place where there are people the refrigerant must not exceed the maximum allowable concentration Otherwise people involved can be stifled by the refrigerant For example the maximum allowed concentration level of refrigerant to a...

Page 46: ... Wire size of power cord should be large enough The damaged power cord and connecting wire should be replaced by exclusive cable 5 All the electrical work should be performed by professional personnel as per local law regulation and this manual 6 The unit must be grounded reliably and it should comply with the relevant requirements of the local country 7 A circuit breaker and a leakage switch that...

Page 47: ...60Hz 25 2 5 2 5 5 GMV 335WM H X 380 415V 3N 50 60Hz 25 4 0 4 0 5 GMV 400WM H X 380 415V 3N 50 60Hz 40 6 0 6 0 5 GMV 450WM H X 380 415V 3N 50 60Hz 40 6 0 6 0 5 GMV 504WM H X 380 415V 3N 50 60Hz 50 10 0 10 0 5 GMV 560WM H X 380 415V 3N 50 60Hz 50 10 0 10 0 5 GMV 615WM H X 380 415V 3N 50 60Hz 50 10 0 10 0 5 GMV 680WM H X 280 400 380 415V 3N 50 60Hz 25 40 2 5 6 0 2 5 5 6 0 5 GMV 730WM H X 280 450 380 ...

Page 48: ...0 0 10 0 2 5 5 10 0 5 10 0 5 GMV 1565WM H X 335 615 615 380 415V 3N 50 60Hz 25 50 50 4 0 10 0 10 0 4 0 5 10 0 5 10 0 5 GMV 1630WM H X 400 615 615 380 415V 3N 50 60Hz 40 50 50 6 0 10 0 10 0 6 0 5 10 0 5 10 0 5 GMV 1680WM H X 450 615 615 380 415V 3N 50 60Hz 40 50 50 6 0 10 0 10 0 6 0 5 10 0 5 10 0 5 GMV 1734WM H X 504 615 615 380 415V 3N 50 60Hz 50 50 50 10 0 10 0 10 0 10 0 5 10 0 5 10 0 5 GMV 1790W...

Page 49: ...erature is 40 and multi core copper cable working temperature is 90 is lying on the surface of slot IEC 60245 If working condition changes please adjust the specification according to standard IEC 60245 Power cord used for outdoor unit should not be below standard 60245 IEC57 Copper core cable must be used The engineering wiring should meet the requirements of IEC 60364 5 52 to ensure that the lin...

Page 50: ...r to the engineering wiring mark on the unit for the power cord connection WARNING When the strong wire and the communication line pass through the wire hole they must be equipped with wire rubber ring 3 8 3 2 External Wiring Diagram Each unit should be equipped with a circuit breaker for short circuit and abnormal overload protection The circuit breaker is normally closed Fig 3 8 3 ...

Page 51: ...is installed in a place with strong electromagnetic interference the communication line between the indoor unit and the wired controller must adopts shielded wires the communication line between indoor units between indoor unit and outdoor unit must use the shielded twisted pairs 1 Selection of communication line between indoor unit and wired controller Wire type Length of communication line betwe...

Page 52: ... the length of the communication line can t be more than 1500m Shielded light ordinary PVC sheathed twisted copper core cord L 1000 2 0 75 IEC 60227 5 2007 When the installation environment of the unit is in strong magnetic or strong interference the shielded wires shall be used Fig 3 9 3 3 9 3 Communication Line Connection Communication bus connection between indoor unit and outdoor unit must be ...

Page 53: ...gy It is not necessary to manually set the address code It only needs to set the main module and centralized control address set it when centralized control of multiple refrigeration systems is required 3 9 5 Communication Connection between IDU and ODU Communication between IDU and ODU is connected through the D1 D2 port of the communication terminal block ...

Page 54: ...ng multiple multi VRF system is connected through G1 and G2 ports on the communication terminal block of main module Below are the connection graphics of single unit and modular units Fig 3 9 7 Connection of single unit Fig 3 9 8 Connection of modular units ...

Page 55: ...ust be routed separately to avoid interference The communication line must be of suitable length and must not be connected The indoor unit must be connected in series and the last indoor unit must be connected to the communication matching resistor provided in the outdoor unit parts list Please refer to the relevant manual for the centralized controller wiring method and settings 3 9 6 Communicati...

Page 56: ... value will blink Press button or button to select code 02 And then press confirm cancel to finish setting Press confirm cancel to return to the previous display until you exit from the setup of parameter values Below are user s parameter settings Parameter code Parameter name Parameter scope Default value Remark P13 Set up address for wired controller 01 master wired controller 02 slave wired con...

Page 57: ... external power cord is correct or not Operation fault occurs or unit is damaged The above inspection items after installation are the inspection for some key components Please conduct the check according to actual needs 4 Debugging and Operation NOTES 1 Do set one only one module as the main module during debugging 2 When there is no special requirement the other functions do not need to be set a...

Page 58: ...d Debugging can be started up only when the preheating is normal otherwise the compressor may be damaged Fig 4 2 1 2 When starting up the debugging the system automatically selects the operating mode according to the current ambient temperature 3 When debugging the front panel of the outdoor unit must be completely closed otherwise it will affect the accuracy of debugging as shown in the Fig as be...

Page 59: ...db ON 03 ON OC ON Once the system module quantity is confirmed it will automatically enter into the next step for judgment 04_indoor unit s quantity confirmation db ON 04 ON The quantity of online indoor units Flash LED3 displays the quantity of online indoor units db ON 04 ON OC ON Indoor unit s quantity inspection is finished Enter into the next step automatically 05_ detect internal communicati...

Page 60: ... charge the refrigerant until the fault is eliminated db ON 09 ON OC ON The system refrigerant judge is normal Enter into the next step automatically 10_ status judgment of main pipeline before starting db ON 10 ON ON ON Starting up the operation db ON 10 ON U6 ON Main pipeline status is abnormal db ON 10 ON OC ON Main pipeline status is normal 11_ reserved function db ON 11 ON AE ON 12_ reserved ...

Page 61: ...ng instruction manual 4 3 2 Debugging Through the Main Board of Outdoor Unit When conducting the debugging through the main board of outdoor unit the main board has the following debugging operation functions Step 1 Cover all the front panels of the outdoor unit and open the debugging window of each basic module Step 2 When the outdoor unit is powered off set one of the modules as the master modul...

Page 62: ...o the outdoor connection At this time the main board of each module is displayed as below Debugging code Progress code Status code Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 03_ module quantity confirmation db ON 03 ON Module quantity Flash After 30s of display the automatic display is as follows if press SW3 button within 30s the display is as follows The ...

Page 63: ...de Display status 05_ detect internal communication db ON 05 ON OC ON Once the system inspection is completed it will enter into the next step automatically If an abnormality is detected it will stay in the current state and manual troubleshooting is required The corresponding faults are as below Debugging code Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Disp...

Page 64: ... Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 07_indoor unit s parts inspection db ON 07 ON OC ON The system detected that there s no fault for indoor unit s parts Then it will automatically enter into the next step If an abnormality is detected it will stay in the current state and manual troubleshooting is required The corr...

Page 65: ...y status 09_refrigerant judgement before startup db ON 09 ON 0C ON The system refrigerant judgment is normal It will automatically enter into the next step If there is no refrigerant in the system or the amount of refrigerant does not meet the requirements for starting operation the unit will display U4 Refrigerant lacking protection as shown below The unit will enter into the next step At this ti...

Page 66: ...de Display status Code Display status 10_ status judgment of main pipeline before starting db ON 10 ON OC ON The main pipeline is turned on normally Step 14 Unit debugging step 11 is reserved function The main module display is as below The unit automatically enters into the next step Debugging code Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status C...

Page 67: ...door unit LED3 will display as below 01 2s later 00 2s later U8 and it will display like that circularly Note In the pilot run stage the unit will display corresponding procedures according to actual circumstances Once debugging is completed resume the standby status and the display is as below Debugging code Progress code Status code Meaning LED1 LED2 LED3 Code Display status Code Display status ...

Page 68: ...w pressure is about 2 7 System high pressure The normal high pressure value of the system is 20 55 According to the change of ambient temperature and the change of operating capacity of the system the high pressure value of the system is 10 40 higher than the ambient temperature The higher the ambient temperature the smaller the temperature difference When the unit operating in the cooling mode at...

Page 69: ...lectronic expansion valve the opening is adjusted automatically in the range of 200 2000PLS 480PLS electronic expansion valve the opening is adjusted automatically in the range of 70 480PLS 17 Drainage system The indoor unit drains smoothly and thoroughly and the condensate water pipe has no slope water storage the outdoor unit can drain water from the drain pipe without dripping directly from the...

Page 70: ...e nearby GREE office or GREE dealer NOTE Do not mix dangerous gases such as oxygen and acetylene into the refrigeration circuit during air tightness and leak test To avoid danger it is best to use nitrogen for such tests 7 Troubleshooting 7 1 Common Malfunction and Troubleshooting Check the following items before asking for repair Phenomenon Reason Measure The unit doesn t run Without power supply...

Page 71: ...hen unit starts or stops That s sound for gas refrigerant stops to flow There is slight and consecutive sound when unit is running or after running That s sound for operation of drainage system Cracking sound is heard when unit is operating and after operating That s sound caused by expansion of panel and other parts due to temperature change The unit blows out duct When unit runs after no operati...

Page 72: ... Malfunction of entry tube temperature sensor d5 Malfunction of mid tube temperature sensor d6 Malfunction of exit tube temperature sensor d7 Malfunction of humidity sensor d8 Malfunction of water temperature sensor d9 Malfunction of jumper cap dA Web address of IDU is abnormal dH PCB of wired controller is abnormal dC Setting capacity of DIP switch code is abnormal dL Malfunction of air outlet te...

Page 73: ...otection of compressor 2 J3 Over current protection of compressor 3 J4 Over current protection of compressor 4 J5 Over current protection of compressor 5 J6 Over current protection of compressor 6 J7 Gas mixing protection of 4 way valve J8 High pressure ratio protection of system J9 Low pressure ratio protection of system JA Protection because of abnormal pressure JC Water flow switch protection J...

Page 74: ...an HH High voltage protection of fan s drive DC bus bar HC Malfunction of current detection circuit of fan drive HL Low voltage protection of bus bar of fan drive HE Phase lacking of inverter fan HF Malfunction of charging loop of fan drive HJ Failure startup of inverter fan HP AC current protection of inverter fan HU AC input voltage of drive of inverter fan G0 PV reversed connection protection G...

Page 75: ...ress DIP switch code of system is shocking CP Malfunction of multiple wired controller CU Communication malfunction between IDU and the receiving lamp Cb Overflow distribution of IP address Cd Communication malfunction between mode exchanger and ODU Cn Malfunction of network for IDU and ODU of mode exchanger Cy Communication malfunction of mode exchanger Status A0 Unit waiting for debugging A2 Ref...

Page 76: ...ency designated by Gree Warranty should meet the following requirements 1 First run of the unit should be operated by professional personnel from Gree appointed service center 2 Only Gree manufactured accessories can be used on the machine 3 All the instructions listed in this manual should be followed 4 Warranty will be automatically invalid if fails to obey any item mentioned above ...

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