Gree M3 Series Service Manual

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Service Manual

GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI

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Summary of Contents for Gree M3 Series

Page 1 Change for life Service Manual GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI...
Page 2 Table of Contents Service Manual Part I : Technical Information ....... 1. Summary ............2. Specifications ............3. Outline Dimension Diagram ........ 4. Refrigerant System Diagram ......5. Electrical Part ........... 5.1 Wiring Diagram ....................5.2 PCB Printed Diagram ..................6.
Page 3 Service Manual Appendix ............... Appendix 1: Reference Sheet of Celsius and Fahrenheit ......Appendix 2: Pipe Expanding Method ............Appendix 3: List of Resistance for Temperature Sensor....... Table of Contents...
Page 4 2. Specifications 1. Summary Service Manual Service Manual Outdoor Unit: BMKH18MC BMKH24MC BMKH30MC BMKH42MC Model list : Model Product code BMKH18MC CB228W16800 BMKH24MC CB228W16900 BMKH30MC CB228W16700 BMKH42MC CB228W17800 Technical Information...
Page 5 Model BMKH18MC Product Code CB228W16800 Rated Voltage 208/230 Power Rated Frequency supply Phases Cooling capacity Btu/h 17000 Heating capacity Btu/h 18000 Cooling Power Input 1420 Heating Power Input 1380 Cooling Current Input 6.28 Heating Current Input 6.12 Rated Power Input 2300/2100 Rated Current 10.0/9.0...
Page 6 Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length 32.8 Connection Pipe Gas Additional Charge oz/ft. Outer Diameter of Liquid Pipe1(GREE Allocation) inch 1/4" (Metric) Outer Diameter of Liquid Pipe2(GREE Allocation) inch 1/4" (Metric)
Page 7 Service Manual Model BMKH24MC Product Code CB228W16900 Rated Voltage 208/230 Power Rated Frequency supply Phases Cooling capacity Btu/h 23200 Heating capacity Btu/h 24000 Cooling Power Input 1860 Heating Power Input 1800 Cooling Current Input 8.00 Heating Current Input 7.83 Rated Power Input 3200/3400 Rated Current 14.2/15...
Page 8 Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length 131.2 Connection Pipe Gas Additional Charge oz/ft. Outer Diameter of Liquid Pipe1(GREE Allocation) inch 1/4" (Metric) Outer Diameter of Liquid Pipe2(GREE Allocation) inch 1/4" (Metric)
Page 9 Service Manual Model BMKH30MC Product Code CB228W16700 Rated Voltage 208/230 Power Rated Frequency supply Phases Cooling capacity Btu/h 28400 Heating capacity Btu/h 30000 Cooling Power Input 2270 Heating Power Input 2250 Cooling Current Input 10.07 Heating Current Input 9.98 Rated Power Input 4600/5000 Rated Current 20.41/21.74...
Page 10 Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length 131.2 Connection Pipe Gas Additional Charge oz/ft. Outer Diameter of Liquid Pipe1(GREE Allocation) inch 1/4" (Metric) Outer Diameter of Liquid Pipe2(GREE Allocation) inch 1/4" (Metric)
Page 11 Service Manual Blank Page Technical Information...
Page 12 Service Manual Model BMKH42MC Product Code CB228W17800 Rated Voltage 208/230 Power Rated Frequency supply Phases Cooling capacity Btu/h 36000 Heating capacity Btu/h 40000 Cooling Power Input 3000 Heating Power Input 3020 Cooling Current Input 13.31 Heating Current Input 13.40 Rated Power Input 4600/5200 Rated Current 20.41/22.61...
Page 13 Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length 164.0 Connection Pipe Gas Additional Charge oz/ft. Outer Diameter of Liquid Pipe1(GREE Allocation) inch 1/4" (Metric) Outer Diameter of Liquid Pipe2(GREE Allocation) inch 1/4" (Metric)
Page 15 3. Outline Dimension Diagram Service Manual BMKH18MC 29 21/64 11 13/16 13 55/64 32 23/64 Unit: inch 20 5/32 BMKH24MC 13 25/64 25 63/64 25 3/4 15 53/64 37 61/64 14 39/64 Unit: inch 22 7/16 Technical Information...
Page 16 Service Manual BMKH30MC BMKH42MC 14 17/32 37 1/8 40 5/32 16 13/16 Unit: inch Technical Information...
Page 17 4. Refrigerant System Diagram Service Manual BMKH18MC outdoor indoor filter outdoor heat exchanger 4-way valve A heat exchanger filter discharge silencer B heat exchanger discharge temperature filter sensor gas -liquid separator A1: A-unit electronic expansion valve B1: B-unit electronic expansion valve A2: A-unit gas pipe temperature sensor B2: B-unit gas pipe temperature sensor A3: A-unit liquid pipe temperature sensor...
Page 18 Service Manual BMKH24MC outdoor indoor filter A heat exchanger outdoor heat exchanger filter 4-way valve B heat exchanger filter discharge silencer discharge temperature sensor C heat exchanger gas -liquid separator filter A1: A-unit electronic expansion valve B1: B-unit electronic expansion valve C1: C-unit electronic expansion valve A2: A-unit gas pipe temperature sensor B2: B-unit gas pipe temperature sensor...
Page 19 Service Manual BMKH30MC outdoor indoor filter A heat exchanger outdoor heat exchanger filter 4-way valve B heat exchanger filter high pressure switch discharge silencer C heat exchanger discharge temperature sensor filter D heat exchanger gas -liquid separator filter A1: A-unit electronic expansion valve B1: B-unit electronic expansion valve C1: C-unit electronic expansion valve D1: D-unit electronic expansion valve...
Page 20 Service Manual BMKH42MC outdoor indoor filter A heat exchanger outdoor heat exchanger filter B heat exchanger 4-way valve filter high pressure switch C heat exchanger filter discharge silencer discharge temperature D heat exchanger sensor filter E heat exchanger gas -liquid separator filter A1: A-unit electronic expansion valve B1: B-unit electronic expansion valve...
Page 21 5. Electrical Part Service Manual 5.1 Wiring Diagram ●Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name White Green COMP Compressor Yellow Brown Grounding wire Blue YEGN Yellow/Green Black Violet Orange ● Outdoor Unit BMKH18MC WARNING BOTTOM OPTIONAL MAGNETIC WH(BU) T-SENSOR HEAT-B COM-INNER...
Page 22 Service Manual BMKH24MC POWER AC-L T-SENSOR 4-WAY GN(YEGN) ELECTRONIC ELECTRONIC ELECTRONIC HEAT-B OVC-COMP TUBE-A TUBE-B TUBE-C WARNING 600007066388 Technical Information...
Page 23 Service Manual BMKH30MC MAGNETIC L-OUT AC-L AC-L N-OUT Main Board 4-WAY VALVE GN(YEGN) EXPANSION MAGNETIC EXPANSION GN(YEGN) EXPANSION RD(BN) PROTECTOR EXPANSION RD(BN) BOTTOM WARNING 600007066451 Technical Information...
Page 24 Service Manual BMKH42MC MAGNETIC POWER TERMINAL RING BLOCK BK(BN) L-OUT AC-L AC-L WH(BU) N-OUT HIGH PRESSURE WH HPS GN(YEGN) SWITCH YEGN TERMINAL BLOCK WH(BU) N(1) 4WAY 4-WAY VALVE OPTIONAL RD(BN) ELECTRONIC EXPANSION (green) VALVE E MAGNETIC RING WH(BU) N(1) U(BU) ELECTRONIC RD(BN) EXPANSION...
Page 25 Service Manual 5.2 PCB Printed Diagram BMKH18MC 3 4 5 Name Name Terminal of compressor Terminal of outdoor fan Terminal of electronic expansion valve A Terminal of 4-way valve Terminal of gas-liquid valve temperature Sensor A 10 Electric heating terminal of chassis Terminal of gas-liquid valve temperature Sensor B Terminal of live wire Terminal of electronic expansion valve B...
Page 26 Service Manual BMKH24MC 9 10 11 12 Name Name Terminal of compressor Terminal of electronic expansion valve B Terminal of high pressure protection 12 Terminal of electronic expansion valve A Overload protection terminal of compressor 13 Terminal of outdoor fan Terminal of temperature sensor 14 Terminal of 4-way valve Terminal of gas-liquid valve temperature Sensor D...
Page 27 Service Manual BMKH30MC BMKH42MC Name Name Overload protection terminal of compressor 12 Terminal of communication neutral wire Terminal of E disk 13 Terminal of compressor Terminal of DRED 14 Terminal of outdoor fan Terminal of high pressure protection 15 Terminal of temperature Sensor Terminal of low pressure protection 16 Terminal of liquid valve temperature Sensor Terminal of communication wire...
Page 28 6. Function and Control Service Manual after 2min; c. the outdoor fan stops after 1min; d. the status of 1 Basic functions of the system 4-way valve: energized; 1.1 Cooling Mode 1.3.3 Outdoor fan control in heating mode 1.1.1 Cooling conditions and process: The outdoor fan starts before 5s of the starting of compressor and then it will run in high speed for 40s;...
Page 29 Service Manual If the discharge temperature protection continuously appears for running only after cutting off the power and then putting through 6 times, the compressor can’t resume running. The compressor the power. can resume running after cutting off the power and then putting 2.8 Compressor Phase-lacking Protection through the power.
Page 30 7. Notes for Installation and Maintenance Service Manual Safety Precautions: Important! the valves are opened before energizing. 13. Check if there is electric leakage on the unit body. If yes, Please read the safety precautions carefully before please eliminate the electric leakage. installation and maintenance.
Page 31 Service Manual Safety Precautions for Installing and Relocating the Unit: To ensure safety, please be mindful of the following precautions. WARNINGS 1. When installing or relocating the unit, be sure to 5. When installing the unit, make sure that connection keep the refrigerant circuit free from air or substances pipe is securely connected before the compressor other than the specified refrigerant.
Page 32 Service Manual Main Tools for Installation and Maintenance Level meter Measuring tape Screw driver Impact drill Drill head Electric drill Electroprobe Universal meter Electronic Inner hexagon Torque wrench Open-end wrench spanner leakage detector Vacuum pump Pressure meter Pipe pliers Pipe pliers Pipe cutter Pipe expander Pipe bender...
Page 33 8. Installation Service Manual Installation Procedures Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install the support of outdoor unit Install wall-mounting (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor...
Page 34 Service Manual 8.1 Electrical Connections 24K: 1. Remove the handle at the right side plate of the outdoor unit (one screw). 2. Remove the cable clamp, connect the power connection cable with the terminal at the row of connection and fix the connection. The fitting line distributing must be consistent with the indoor unit.
Page 35 Service Manual 42K: To unit D To unit E To unit A To unit B To unit C L1 L2 connecting connecting connecting connecting connecting cable cable cable cable cable To the power supply & /1 /2 white green white black white green...
Page 36 Service Manual 8.2 Installing the Outdoor Unit electronic leak device. (7) Turn the body of the 2-way and 3-way valves. Disconnect the vacuum pump hose. Use bolts to secure the unit to a flat, solid floor. (8) Replace and tighten all the caps on the valves. When mounting the unit on a wall or the roof, make sure the support is firmly secured so that it cannot move in the event of Piping size (inch)
Page 37 Service Manual 8.4 Maintenance Fix the support of outdoor unit (select it according to the actual installation situation) 1. Select installation location according to the house structure. Use suitable instruments for the refrigerant R410A. 2. Fix the support of outdoor unit on the selected location with expansion screws.
Page 38 Service Manual 8.6 Check after Installation Check Items Problems Owing to Improper Installation Is the installation reliable? The unit may drop, vibrate or make noises May cause unsatisfactory cooling (heating) Has the gas leakage been checked? effect Is the thermal insulation of the unit May cause condensation and water dropping sufficient? May cause condensation and water dropping...
Page 39 9. Maintenance Service Manual 9.1 Precautions before Performing Inspection or Repair There are high-capacity electrolytic capacitors on the outdoor mainboard. Thus, even the power is cut off, there is high voltage inside the capacitors and it needs more than 20min to reduce the voltage to safety value. Touching the electrolytic capacitor within 20min after cutting the power will cause electric shock.
Page 40 Service Manual 9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement 1. Requirement of malfunction display When several malfunctions happen at the same time, malfunction codes will be displayed circularly. 2. Malfunction display method (1) Hardware malfunction: it will be displayed immediately, please refer to “Malfunction status sheet”; (2) Operation status: it will be displayed immediately, please refer to “Malfunction status sheet”;...
Page 41 Service Manual Viewing malfunction code through remote controller within Compressor overload protection 200s; displayed directly on nixietube after 200s Indoor unit and outdoor unit do not match Hardware malfunction Malfunction of memory chip Hardware malfunction Wrong connection of communication wire or malfunction of Hardware malfunction electronic expansion valve Malfunction of complete units current detection...
Page 42 Service Manual if the indoor and outdoor heat exchanges are Installation and Maintenance...
Page 43 Service Manual 2. PFC protection malfunction, capacity charging malfunction Main checking points: If the wiring of the induction is connected well and if the induction is broken; If the mainboard is broken; Flow chart: For 14/18K Installation and Maintenance...
Page 44 Service Manual 3. Compressor desynchronizing malfunction Main checking points: If the pressure of the system is too high; If the eletric expansion valve is working normally or it is broken; If the radiation of the unit is good; Flow chart: as soon as energizing and starting Installation and Maintenance...
Page 45 Service Manual Desynchronizing happens Installation and Maintenance...
Page 46 Service Manual 4. Compressor overload, diacharge protectionmalfunction Main checking points: If the eletric expansion valve is connected well or it is broken; If there is refrigerant leakage; If the overload protector is broken; Flow chart: Check the coil of the eletric Note: the detection method of the coil of the eletric expansion valve: there is five pieces of coil of the eletric expansion valve, the resistance of one of them (the leftmost or the rightmost one) is almost the same as the resistance of other terminal (within ).
Page 47 Service Manual 5. Start failuremalfunction Main checking points: If the connection wire of the compressor is connected properly; If the stop duration of the compressor is sufficient; If the compressor is broken; If th; e refrigerant charging amount is too much; Flow chart: Energize and start the unit...
Page 48 Service Manual 6. Temperature sensor malfunction Main checking points: If the temperature; sensor is damaged or broken If the terminal of the temperature sensor is loosended or not connected; If the mainboard is broken; Flow chart: Replace the temperature sensor Installation and Maintenance...
Page 49 Service Manual 7. DC fan malfunction Main checking points: If the outdoor fan is blocked by foreign objects; The connection wire of DC fan is connected reliably? If it is loose? Flow chart: Turn on the unit after removing the foreign objects Turn on the unit after the connection wire...
Page 50 Service Manual 8. Communication malfunction Main checking points: If the connection wire between the indoor unit and outdoor unit is connected well, if the wires inside the unit is connected well; If the indoor mainboard or outdoor main board is broken; Flow chart: Installation and Maintenance...
Page 51 Service Manual All the indoor units appear communication malfunction De-energize,check if the connection wire of indoor and outdoor unit and the wire of the eletric box is connected correctly Reconnect according to Eliminate the malfunction Connected correctly? the wiring diagram De-energize, check if the connection wire between the outdoor mainboard and the filter board according to the wiring diagram...
Page 52 Service Manual 9. Anti-high temperatureand overload malfunction Main checking points: If the outdoor ambient temperature is within the normal range; If the indoor fan and outdoor fan are running normally; If the indoor and outdoor radiation environment is good; Flow chart: If the outdoor fan is working normally Replace outdoor fan Installation and Maintenance...
Page 53 Service Manual 9.4 Troubleshooting for Normal Malfunction 1. Air Conditioner Can't be Started Up Discriminating Method (Air conditioner Possible Causes Troubleshooting Status) Confirm whether its due to power failure. If yes, wait for power recovery. If not, check power supply No power supply, or poor connection After energization, operation indicator isn't circuit and make sure the power plug is connected...
Page 54 Service Manual 4. ODU Fan Motor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Wrong wire connection, or poor Check the wiring status according to circuit Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly connection diagram Measure the capacity of fan capacitor with an...
Page 55 10. Exploded View and Parts List Service Manual BMKH18MC Description Description Description Front Grill Valve Cover Electric Box Assy Front Panel Assy Handle Assy Electric Box Cover Axial Flow Fan Temperature Sensor Main Board Chassis Sub-assy Rear Grill Radiator Drainage Joint Condenser Assy Electric Box 4-Way Valve Assy...
Page 56 Service Manual BMKH24MC The component is only for rererence; please refer to the actual product. Description Description Description Front Grill Inhalation tube Assy Electric Box Assy Front Panel 4-Way Valve Assy Condenser Assy Axial Flow Fan Valve Support Assy Clapboard Sub-Assy Drainage hole Cap Right Side Plate Top Cover Assy...
Page 57 Service Manual BMKH30MC The component is only for rererence; please refer to the actual product. Description Description Description Left Side Plate Wire Clamp Electronic Expansion Valve assy Handle Condenser Assy 4-Way Valve Assy Brushless DC Motor Gas-liquid Separator Assy Compressor and Fittings Motor Support Sub-Assy Clapboard Chassis Sub-assy...
Page 58 Service Manual BMKH42MC 24 23 The component is only for rererence; please refer to the actual product. Description Description Description Left Side Plate Wire Clamp Electronic Expansion Valve assy Handle Condenser Assy 4-Way Valve Assy Brushless DC Motor Gas-liquid Separator Assy Compressor and Fittings Motor Support Sub-Assy Clapboard...
Page 59 11. Removal Procedure Service Manual BMKH24MC Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove valve cover Remove the connection screw fixing the valve cover and then remove the valve cover.
Page 60 Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
Page 61 Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
Page 62 Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Motor Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
Page 63 Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Unsolder the welding joint connecting the 4-way valve assy with the cut-off valve and the condenser connection pipe, and then remove the 4-way valve assy. 14. Remove valve support sub-assy and expansion Expansion valve assy valve assy Remove the screw connecting the valve support and...
Page 64 Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
Page 65 Service Manual BMKH18MC Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove valve cover valve cover Remove the connection screw fixing the valve cover and then remove the valve cover.
Page 66 Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
Page 67 Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
Page 68 Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Motor Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
Page 69 Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Unsolder the welding joint connecting the 4-way valve assy with the cut-off valve and the condenser connection pipe, and then remove the 4-way valve assy. 14. Remove valve support sub-assy and expansion valve assy Expansion valve assy Remove the screw connecting the valve support and...
Page 70 Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
Page 71 Service Manual BMKH30MC Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove valve cover valve cover Remove the connection screw fixing the valve cover and then remove the valve cover.
Page 72 Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
Page 73 Service Manual Step Procedure 7. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill. 8. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support.
Page 74 Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. Motor support 11. Remove motor and motor support Motor Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
Page 75 Service Manual Step Procedure 4-way valve assy 13. Remove 4-way valve assy Remove screws fixing the electricbox; loosen the wire bundle; pull out the wiring terminals and then pull electric box upwards to remove it. 14. Remove valve support sub-assy and expansion Expansion valve assy valve assy Remove the screw connecting the valve support and...
Page 76 Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove vapour liquid separator vapour liquid separator Remove the screw connecting the vapour liquid separator, then remove the vapour liquid separator. 18.
Page 77 Service Manual Step Procedure 20. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
Page 78 Service Manual BMKH42MC Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove handle Handle Remove the connection screws fixing the handle and the right side plate, and then remove the handle.
Page 79 Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
Page 80 Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
Page 81 Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Motor Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
Page 82 Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Remove screws fixing the electricbox; loosen the wire bundle; pull out the wiring terminals and then pull electric box upwards to remove it. 14. Remove valve support sub-assy and expansion valve assy Expansion valve assy Remove the screw connecting the valve support and...
Page 83 Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
Page 84 Appendix Service Manual Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit Celsius Fahrenheit Celsius Fahrenheit Celsius Fahrenheit display Fahrenheit display Fahrenheit display temperature（℉）（℉）（℃） temperature（℉） temperature（℉）（℉）（℃）...
Page 85 Service Manual Appendix 2: Pipe Expanding Method Pipe Note: Improper pipe expanding is the main cause of refrigerant leakage.Please expand Pipe cutter the pipe according to the following steps: A:Cut the pip Leaning Uneven Burr ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●...
Page 86 Service Manual Appendix 3: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579 1.009 16.39 3.454...
Page 87 Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443 1.269 137.2 4.289 1.233...
Page 88 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35 15.17 4.08 580.6 73.83 14.62...
Page 89 JF00304988 GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI Add: West Jinji Rd, Qianshan, Zhuhai,Guangdong, China, 519070 Tel: (+86-756) 8522219 Fax: (+86-756) 8669426 E-mail: global@cn.gree.com For product improvement, specifications and appearance in this manual are subject to change without prior notice.

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