Gree LSQWRF35VM/NaA-M, Service Manual

Page 1: ...Service Manual Change for life A series modular air cooled chiller heat pump T1 R410A 50Hz T1 R32 50Hz...

Page 2: ...1 1 4 3 Scope of supply 13 2 Unit control 15 2 1 Schematic diagram 15 2 2 Operation flowchart 17 2 2 1 Cooling 17 2 2 2 Heating 18 2 3 Key control logics 19 2 3 1 Cooling control 19 2 3 2 Heating cont...

Page 3: ...ce space 33 3 3 5 Installation foundation 34 3 3 6 Handling and lifting 34 3 3 7 Placement of the main unit 35 3 4 Piping and insulation 35 3 4 1 Installation of the water system 35 3 4 2 Requirements...

Page 4: ...t of troubleshooting 68 4 3 Power distribution 74 4 3 1 Power distribution logic 74 4 3 2 Introduction to main electric elements 74 4 3 3 Main board 75 4 4 Replacement of main parts 77 4 4 1 Brief int...

Page 5: ...1 Product Product...

Page 6: ...death or serious injury as well as damage to the property PREFACE Thank you for selecting Gree s A Series Inverter Modular Air cooled Chiller Heat Pump Please read this instruction manual carefully be...

Page 7: ...function Omit cooling only R heat pump 4 Cooling method of condenser F air cooled 5 Rated cooling capacity Rated cooling capacity number kW 6 System type Omit fixed frequency V variable frequency 7 As...

Page 8: ...ell as the optimized air passage can greatly lower operation noise of the unit Besides the quite mode can provide the user a ultra quiet environment 4 Powerful self protection It is equipped with the...

Page 9: ...water pressure Cooling 0 06MPa 1 6MPa Heating 1 2 Performance correction curves Here are curves indicating the unit performances in cooling and heating states Leaving water temperature C Leaving wate...

Page 10: ...ving water temperature C Capacity kW Ambient temperature C Capacity kW Ambient temperature C LSQWRF130VM NhA M Cooling LSQWRF130VM NhA M Heating 1 3 Working principle Here are diagrams below to presen...

Page 11: ...or Defrosting temp Suction temp Leaving water temp s ensor Capillary tube Solenoid valve Stop valve Stop valve Water flow switch Shell an d t ube heat exchanger Low pressure switch for heating Low pre...

Page 12: ...igh pressure switch 4 way valve High pressure switch 4 way valve Finned heat exchanger Fan Finned heat exchanger Capillary tube Capillary tube Solenoid valve Solenoid valve Defrosting temp sensor COOL...

Page 13: ...ssure sensor Leaving water temp s ensor Solenoid valve Stop valve Stop valve Stop valve Stop valve Fan Low pressure switch for heating Low pressure switch for cooling Defrosting temp sensor Suction te...

Page 14: ...C 3Ph 50Hz 1 30 17 5 2 0 7 LSQWRF60VM NaA M 380V 415V AC 3Ph 50Hz 2 30 17 5 2 1 28 LSQWRF65VM NaA M 380V 415V AC 3Ph 50Hz 2 30 17 5 2 1 28 LSQWRF35VM NhA M 380V 415V AC 3Ph 50Hz 1 22 19 2 2 0 70 LSQWR...

Page 15: ...or cutout temperature sensor cutout four way valve safety control compressor overheating control Compressor Type Fully enclosed rotor type compressor Quantity 1 2 2 Starting mode With variable frequen...

Page 16: ...t temperature sensor cutout four way valve safety control compressor overheating control Compressor Type Fully enclosed rotor type compressor Quantity 1 2 4 Starting mode With variable frequency Water...

Page 17: ...ree wire control lines 8m S Accessories for the unit XE73 25 G S Additionally purchased Electric control cabinet O Auxiliary electric heater O Power lines O Control lines O Connecting hose O Thermomet...

Page 18: ...14 Unit Control Unit Control...

Page 19: ...play Then the display will tell there is an error and the unit will stop or will not start 3 An ambient temperature sensor is used to detect the temperature of the environment where the unit is which...

Page 20: ...ails compressors and fans of the corresponding unit will stop 9 An air temperature sensor on shell and tube heat exchanger is used to detect the air temperature When this sensor fails the compressor i...

Page 21: ...2 Operation flowchart 2 2 1 Cooling Yes Yes open Is system 1 ready to start compressors Is system 1 ready to stop compressors EXV for cooling mode is in timer control EXV for cooling mode is reset Co...

Page 22: ...18 Unit Control 2 2 2 Heating Yes Yes Yes open Is system 1 ready to start compressors EXV for heating mode is in timer control EXV for heating mode is reset Is system 1 ready to stop compressors...

Page 23: ...the leaving water temperature back to normal over temperature protection will be removed If it occurs with a reduced frequency the compressor should be controlled by the water temperatures for working...

Page 24: ...nication fault for any unit all compressors of this unit will stop and then the water pump will follow Irrecoverable protection 1 Protection against high pressure for the compressor 1 2 When it is det...

Page 25: ...nitor up to 255 variable frequency modular type chillers including turning on off the units setting parameters giving alarms for malfunctions which is an efficient tool for management of intelligent a...

Page 26: ...ype L1 Category 5 twisted pairs two four wire connectors one for the communication patching board the other for the unit S L2 Category 5 twisted pairs two four wire connectors S L3 Category 5 twisted...

Page 27: ...isc optoelectronic isolated converter Communication patching board ZTSJ0 P It is required when several units forms a network Optoelectronic isolated converter GD02 P It is required when there is no re...

Page 28: ...frequency modular type chiller EL01500720 19 LSQWRF60VM NaA M Accessory XE73 25 G NC20700050 7 Patch board ZTSJ0 30118023 6 Optoelectronic repeater RS485 W EN02200010 1 Example 3 This project consists...

Page 29: ...25 Unit Installation Unit Installation...

Page 30: ...nit Connection of the water system Piping Electric wiring Installation of condensate pipes Pressure test Anti corrosion and insulation of pipes Cleaning of pipes Protection for finished products Insta...

Page 31: ...ric shock The drain pipe should be installed in accordance with the Installation Startup and Maintenance Manuall and this Service Manual to ensure free drainage and the drain pipe should be insulated...

Page 32: ...communication 6 Improper protection to the communication lines The unit would fail to run with the communication fault 7 Poor insulation for the chilled water lines Missed cracked unqualified insulati...

Page 33: ...3 Installation instructions 3 3 1 Outline dimensions 1 LSQWRF35VM NaA M unit mm Installation hole Water oulet G1 1 2 male thread Water inlet G1 1 2 male thread Drain valve 1200 729 15 22 765 845 166 1...

Page 34: ...30 Unit Installation 2 LSQWRF60VM NaA M LSQWRF65VM NaA M unit mm 1 1 Installation hole 2060 844 Water oulet G2 male thread Water inlet G2 male thread Drain valve 143 1675 2200 258 851 880 965 22 15...

Page 35: ...31 Unit Installation 3 LSQWRF35VM NhA M unit mm Installation hole Water oulet G1 1 2 male thread Water inlet G1 1 2 male thread Drain valve 1200 729 15 22 765 845 166 146 126121 246 1340 1605...

Page 36: ...m 1 1 Installation hole 2060 844 Water oulet G2 male thread Water inlet G2 male thread Drain valve 143 1675 2200 258 851 880 965 22 15 5 LSQWRF130VM NhA M unit mm Water in 369 2120 376 1650 2305 2040...

Page 37: ...ts If the floor is quite thin or there is vip rooms under the floor the spring damper is required 3 Fire inflammably corrosive gas and waste gas should be avoided around the unit Also the unit cannot...

Page 38: ...ity However special attention should be paid during handling and shipping to prevent the control system and the piping system from being damaged The unit should be moved by the forklift or hoisting ma...

Page 39: ...et outlet Moreover a drain valve shall be installed at the outlet and an air release valve shall be installed at the inlet At the highest point of the water system another release valve shall be insta...

Page 40: ...s required to ensure an adequate flow rate inside the piping system NOTE Do not treat the unit with saline mixture to prevent corrosion See the diagram below to install the water system Flow switch Fl...

Page 41: ...od Straightness DN 100mm 2L max 440mm By the ruler tape measurement DN 100mm 3L max 460mm Verticality 25L max 425mm By the ruler tape measurement Interval of Parallel Pipes 15mm By the ruler tape meas...

Page 42: ...ments and codes 3 Supports should be installed securely and contact the pipe closely Separate supports are required at the connection joint between the pipe and the equipment 4 Supports for chilled an...

Page 43: ...ne 4 5 times When the temperature is among 70 95 C it should be painted with heat resistant anti rust paint 4 5 times Do not do directly welding on the water tank with surface treatment 3 The water ta...

Page 44: ...installed at the highest point of the condensate pipe to prevent foreign matters coming into the drain pipe The S shaped trap and flexible joint are necessary The diameter of the pipes should be suit...

Page 45: ...ze of the tee drain pipe should match with the running capacity of the unit As pressure at the water outlet is quite large an water trap is required for the drain pipe which is applicable to the horiz...

Page 46: ...es d other unreliable places Do not make the power lines and communication lines entwined and arrange them separately with a distance no less than 20cm otherwise it would lead to abnormal communicatio...

Page 47: ...nals HL2 C D of the error indicator If it is required to display the error of each unit independently then the error indicator of each unit should be wired independently to the corresponding error out...

Page 48: ...Unit 3 When one auxiliary electric heater serves more than one modules its wiring terminals 11 and 12 are connected to terminals G and H respectively of an AC contactor marked with KM3 11 12 11 12 11...

Page 49: ...dicator and external passive contact switch should be wired to the corresponding wiring board of all units Unit 1 Unit 2 Unit 3 When one auxiliary electric heater serves more than one modules its wiri...

Page 50: ...live line Control output neutral line Note the output control lines of the AC contactors for the auxiliary electric heater 1 auxiliary electric heater 2 can be wired to the corresponding wiring board...

Page 51: ...power cable listed in the table above are applied to the conduit guarded multi wire copper cable like JYV copper cable consisting of PV insulated wires and a PVC cable jacket used at 45 C and resistib...

Page 52: ...48 Unit Installation 2 LSQWRF60VM NhA M 12 13 EH1 EH2 Water pump KM2 KM3 KM4 KM1 KM2 14 15 5 6 7 8 KM4 10 KM1 KM1 KM3 KM4 HL3 HL5 HL4 HL6 HL3 6 3 LSQWRF130VM NhA M...

Page 53: ...uit 2 The power cord must enter the electric box through a rubber or plastic ring to avoid any damaged caused by the sharp edge of the metal sheet 3 The power cord close to the electric box must be at...

Page 54: ...e control signal 220 AC 5A to control the chilled water pump and auxiliary electric heater however never do not drive them directly through the control signal but through their AC contactors 3 Switchi...

Page 55: ...51 Unit Installation 3 5 6 Networking and wiring between units 1 LSQWRF35VM NaA M LSQWRF60VM NaA M LSQWRF65VM NaA M LSQWRF35VM NhA M...

Page 56: ...n board PC Main board PC Main board PC Main board PC Main board PC Left To electric box To electric box To electric box To electric box Communiction line Central electric box Central electric box Covn...

Page 57: ...lines should be connected to L1 L2 L3 and N at XT1 through a piece of four core rubber sleeve cable as shown in the figure above d There are two solutions for remote monitoring Install the remote mon...

Page 58: ...54 Unit Installation 3 5 7 Electric wiring digram 1 LSQWRF35VM NaA M...

Page 59: ...55 Unit Installation 2 LSQWRF60VM NaA M LSQWRF65VM NaA M...

Page 60: ...56 Unit Installation 3 LSQWRF35VM NhA M...

Page 61: ...57 Unit Installation 4 LSQWRF60VM NhA M...

Page 62: ...58 Unit Installation 5 LSQWRF130VM NhA M...

Page 63: ...59 Unit Installation...

Page 64: ...60 Unit Installation The electric wiring diagrams on the unit always prevail...

Page 65: ...jumpers Jumpers list Model Code Jumper no Matched compressor LSQWRF35VM NaA M 4202021905 QXAS H80zN345H LSQWRF60VM NaA M 4202021907 7 QXAS H80zN345H LSQWRF65VM NaA M 4202021906 6 QXAS H80zN345H LSQWR...

Page 66: ...62 Test Operation Troubleshooting and Maintenance Test Operation Troubleshooting and Maintenance...

Page 67: ...fore any operation to the unit Meanwhile please observe required safety operation All installation and operation should comply with design requirements of this product and local safety requirements Ne...

Page 68: ...nside the system Check the work load 1 Are the air handling units connected correctly 2 Do all diffusers work smoothly 3 Are the tightness and insulation of the conditioned space in good condition 4 D...

Page 69: ...al difference of the entering and leaving water should be 4 6 C 1 If the temperature difference is larger than 4 6 C raise it by reducing the water flow of other units 2 If the temperature difference...

Page 70: ...nually cleared for normal operation of next time High discharge protection Discharge temperature sensor When it is detected that the discharge temperature exceeds the setpoint the compressor will be s...

Page 71: ...for the four way valve Entering and leaving water temperature sensors When it is detected that the entering water temperature is 4 C higher than the leaving water temperature and the latter continuous...

Page 72: ...or aged Are water pipes designed improperly The flow becomes smaller when the terminal unit is turned off Is there air inside the system It often occurs after maintenance Does the controller alarm inc...

Page 73: ...side the shell and tube Are water pipes designed improperly The flow becomes smaller when the terminal unit is turned off Does refrigerant leak Does the controller alarm incorrectly Replace the coils...

Page 74: ...nsor used it often occurs after maintenance Does the controller alarm incorrectly Replace the coils of the electric expansion valve or even the main body Clean the filter Adjust the discharge temperat...

Page 75: ...s the phase sequence incorrect Yes Is there phase loss Is the phase protector damaged Does the controller alarm incorrectly Check the power supply Replace the phase protector If this occurs frequently...

Page 76: ...rt Yes Is the the flow switch not installed or installed improperly Is the flow switch faulty Does the controller alarm incorrectly Install the flow switch or check the installation Maintain the flow...

Page 77: ...ture sensor Contact the supplier Yes No No Check the direction of the sensor probe Yes 7 Protection for the four way valve Protection for the 4 way valve Entering and leaving water temperature sensor...

Page 78: ...sult No power for the controller and ON OFF operation is failed Handling interchange the wiring sequence and check if the voltage of the 3 phase power supply is normal 4 3 2 Introduction to main elect...

Page 79: ...1 Water flow switch 2 System 2 low pressure switch for heating 3 System 1 high pressure switch 4 System 1 low pressure switch for heating 5 External passive contact switch 6 Preserved 7 Preserved 8 S...

Page 80: ...nsor 23 System 2 shell and tube outlet temp sensor 24 System 2 high pressure sensor 25 System 1 shell and tube outlet temp sensor 26 220V input 27 COMP2 band heater 2 28 COMP2 band heater 1 29 4 way v...

Page 81: ...refrigerant for either heating or cooling Shell and tube heat exchanger It is intended conduct heat exchange between the refrigerant and the second refrigerant Finned heat exchanger At the cooling mod...

Page 82: ...ull the front panel upwards and then remove it Properly keep the removed front panel to avoid from being damaged Note there are two clasps at each panel for connecting with side panels 2 Remove power...

Page 83: ...are must be taken to not damage rubber pads Seal the replaced compressor to prevent moisture entering Place a new compressor at the rubber pads Steel bushing is required for rubber pads Tighten the st...

Page 84: ...un the compressor for ten minutes and then open this valve until no oil comes out Repeat this operation twice for normal oil level Replacement of the 4 way valve Note be sure power supply has been cut...

Page 85: ...o keep its completeness for further analysis Desolder the 4 way valve 4 Replace it with a new one and clean the system Do use the one with the same model for replacement The one with different model c...

Page 86: ...coils pipe clamps and rubber pads Take out coils Loosen screws and take out pipe clamps and rubber pads Wrap the valve with wet cloth to prevent the sliding block from being burn out In this case car...

Page 87: ...lge of the coil should match with the re cess of the main body of the valve Keep the vacuum degree to 1 0bar Vacuuming period would be longer for the repaired unit Charged refrigerant should be the sa...

Page 88: ...De solder connection pipes De solder connection pipes with a soldering gun 3 Take out the vapor liquid separator Loosen fixed screws and take out the vapor liquid separator 4 Clean the system by charg...

Page 89: ...en it is required to add lubricating oil charge it from the inlet of the vapor liquid separator before soldering Charge lubrication oil from the inlet of the vapor liquid separator and then do solderi...

Page 90: ...oid from being damaged Note there are two clasps at each panel for connecting with side panels 2 Remove power lines and the electric heater Remove the insulation of the compressor Loosen screws of pow...

Page 91: ...on of the compressor Reconnect and resolder the suction and discharge lines Do charge nitrogen during soldering After soldering charge high pressure nitrogen for the leak test Power on the unit and st...

Page 92: ...moved front panel to avoid from being damaged Note there are two clasps at each panel for connecting with side panels 2 Remove the electric control box Disconnect electric lines inside and outside of...

Page 93: ...d power supply has been cut off before replacement Steps Image Instructions 1 Reclaim refrigerant and remove the middle panel Cut off power supply of the unit Reclaim refrigerant Remove the middle pan...

Page 94: ...ogen during soldering Protection measures should be taken during soldering to prevent surrounding objects from being burnt out 6 Tighten coils pipe clamps and rubber pads vacuum the system recharge re...

Page 95: ...her to avoid loss Pull the front panel upwards and then remove it Properly keep the removed front panel to avoid from being damaged 2 Remove power lines and the electric heater Loosen screws of power...

Page 96: ...t care must be taken to not damage rubber pads Seal the replaced compressor to prevent moisture entering Place a new compressor at the rubber pads Steel bushing is required for rubber pads Tighten the...

Page 97: ...compressor for ten minutes and then open this valve until no oil comes out Repeat this operation twice for normal oil level Replacement of the 4 way valve Note be sure power supply has been cut off an...

Page 98: ...ith four pipes as before Solder the pipelines with a soldering gun Do charge nitrogen during desoldering 4 Vacuum the system and recharge refrigerant Keep the vacuum degree to 1 0bar Vacuuming period...

Page 99: ...and take out pipe clamps and rubber pads Wrap the valve with wet cloth to prevent the sliding block from being burn out In this case care must be taken to not let water enter the pipe 3 Desolder conne...

Page 100: ...he bulge of the coil should match with the recess of the main body of the valve Keep the vacuum degree to 1 0bar Vacuuming period would be longer for the repaired unit Charged refrigerant should be th...

Page 101: ...soldering gun 3 Take out the vapor liquid separator Loosen fixed screws and take out the vapor liquid separator 4 Clean the system by charging nitrogen Connect a nitrogen line When its size is quite...

Page 102: ...he inlet of the vapor liquid separator before soldering Inlet Charge lubrication oil from the inlet of the vapor liquid separator and then do soldering 7 Reconnect pipes vacuum the system recharge ref...

Page 103: ...ystem as an example Step 1 Remove the high pressure nitrogen that was used for the leak test Step 2 Fix pressure gauges to refrigerant nozzles of high pressure and low pressure valves note vacuum pump...

Page 104: ...ed by excessive charging and inhibit a capacity decline of the unit induced by insufficient charging when the unit is running make sure it is gaseous refrigerant as possible as it can be from a refrig...

Page 105: ...QWRF35VM NaA M EL01500750 part list No Name Quantity 1 Rear Grill 2 2 Coping 1 3 Top Cover front 2 4 Upper Cover Plate back 1 5 Axial Flow Fan 2 6 Brushless DC Motor 2 7 Motor Support Sub Assy 4 8 Con...

Page 106: ...Compressor 2 24 Compressor and Fittings 1 25 Strainer 2 26 Steam current Switch 1 27 Base Frame Assy 1 28 Electrical Heater Chassis 1 29 Electric Box Assy 1 30 Main Board 1 31 Intermediate relay 2 32...

Page 107: ...1500720 LSQWRF65VM NaA M EL01500760 part list No Name Quantity 1 Rear Gril 2 2 Coping 2 3 Top Cover 4 4 Axial Flow Fan 2 5 Axial Flow Fan Nesting 2 6 Brushless DC Motor 2 7 Motor Support Sub Assy 2 8...

Page 108: ...rator 2 30 Compressor and Fittings 2 31 Electrical Heater Compressor 2 32 Electrical Heater Compressor 2 33 Base Frame Assy 1 34 Electrical Heater Chassis 2 35 Electronic Expansion Valve 2 36 Electric...

Page 109: ...105 Test Operation Troubleshooting and Maintenance No Name Quantity 57 One Way Valve 2 58 Sensor Sub assy 1 59 Left Side Plate 1 LSQWRF35VM NhA M...

Page 110: ...essure Protect Switch 1 17 Temp Sensor Sleeving 4 18 Electric Expand Valve Fitting 1 19 Temp Sensor Sleeving 1 20 Electronic Expansion Valve 1 21 Left Side Plate 1 22 Gas liquid Separator 1 23 Plastic...

Page 111: ...ric Box Assy 1 44 Terminal board 1 45 Reactor 4 46 One Way Valve 1 47 Filter 1 48 Handle 2 49 Sensor Sub assy 1 50 Temperature Sensor Support 1 51 Right Side Plate 1 52 Radiator 2 53 Radiator 1 54 Rin...

Page 112: ...NhA M EL01500830 part list No Name of part Quantiy 1 Rear Grill 2 2 Coping 2 3 Axial Flow Fan 2 4 Ring For Flow Diversion 2 5 Brushless DC Motor 2 6 Condenser Assy Left 1 7 Rear Grill 1 2 8 Pressure S...

Page 113: ...ic Expand Valve Fitting 1 28 Electrical Heater Compressor 2 29 Gas liquid Separator 2 30 Electrical Heater Compressor 2 31 Base Frame Assy 1 32 Electrical Heater Chassis 2 33 Compressor and Fittings 2...

Page 114: ...ntenance No Name of part Quantiy 54 Temperature Sensor Support 1 55 One Way Valve 2 56 Left Side Plate 1 57 Sensor Sub assy 1 LSQWRF130M NhA M LSQWRF130M NhA M EL01500970 part list No Name of parts Qu...

Page 115: ...gnet Coil 1 20 Electronic Expansion Valve 4 21 4 Way Valve 4 22 Pressure Protect Switch 1 23 Temp Sensor Sleeving 4 24 Bidirection Strainer 8 25 Magnet Coil 2 26 Pressure Protect Switch 1 27 One Way V...

Page 116: ...1 52 Electric Box Assy 1 53 Electric Expand Valve Fitting 1 54 Electric Expand Valve Fitting 1 55 Electric Cabinet Assy 2 56 Terminal Board 2 57 Reactor 2 58 Terminal Board 2 59 Electric Cabinet Assy...

Page 117: ...s any filter clogged Is the temperature setpoint proper Is there a large amount of condensate at the chilled water pipe or the condensate pipe Is insulation layer damaged Requirements on water quality...

Page 118: ...e water inlet to see if scale on the shell and tube has been removed If not clean the shell and tube separately again by the skilled serviceman and then rinse them If there is still sand scale and oth...

Page 119: ...inter When the unit is not going to be used for a long time clean and dry the internal and external surfaces of the unit and then it would be better to wrap it Under the subzero climate the unused uni...

Page 120: ...Guangdong China 519070 Tel 86 756 8522218 Fax 86 756 8669426 E mail global cn gree com www gree com For continuous improvement in the products Gree reserves the right to modify the product specificati...