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Summary of Contents for Gree GWH28ACE-K3NNA1A
- Page 1 Change for Life Service Manual Model: GWH28ACE-K3NNA1A (Refrigerant R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...
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Page 2: Table Of Contents
Service Manual Table of Contents Part Ⅰ : Technical Information ...............1 1. Summary ........................1 2. Specifications ......................2 2.1 Specification Sheet ......................2 2.2 Capacity Curve in Different Outdoor Temperature ............4 2.3 Cooling and Heating Data Sheet in Rated Frequency .............4 3. Outline Dimension Diagram ................5 3.1 Indoor Unit ........................5 3.2 Outdoor Unit ........................5... - Page 3 Service Manual 10. Exploded View and Parts List ..............45 10.1 Indoor Unit ........................45 10.2 Outdoor Unit .........................47 11. Removal Procedure ..................49 11.1 Removal Procedure of Indoor Unit ................49 11.2 Removal Procedure of Outdoor Unit ................54 Appendix: ........................59 Appendix 1: Reference Sheet of Celsius and Fahrenheit ............59 Appendix 2: Configuration of Connection Pipe ..............59 Appendix 3: Pipe Expanding Method ...................60 Appendix 4: List of Resistance for Temperature Sensor ............61...
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Page 4: Part Ⅰ : Technical Information
Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit: GWH28AAE-K3NNA1A/I Outdoor Unit: GWH28AAE-K3NNA1A/O Remote Controller: YAW1F Technical Information... -
Page 5: Specifications
Service Manual 2. Specifications 2.1 Specification Sheet Model GWH28ACE-K3NNA1A Product Code CA497000801/CA497000802 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 8000 Heating Capacity 8500 Cooling Power Input 2846 Heating Power Input 2647 Cooling Current Input 12.3... - Page 6 Service Manual Model of Outdoor Unit GWH28AAE-K3NNA1A/O Outdoor Unit Product Code CA476W02101 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO., LTD Compressor Model QXAS-F305N450 Compressor Oil ATMOS-RB68EP or equivalent Compressor Type Rotary L.R.A. Compressor RLA 11.6 Compressor Power Input 2525 Overload Protector Throttling Method Capillary Operation Temp...
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Page 7: Capacity Curve In Different Outdoor Temperature
Service Manual 2.2 Capacity Curve in Different Outdoor Temperature Cooling Heating Condition Condition Heating °C °C Indoor:DB27 WB19 Indoor:DB20 °C Indoor air flow: Super High Indoor air flow: Super High Pipe length:5m Pipe length:5m -7 -5 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Outdoor temp.( ) Outdoor temp.( ) °C... -
Page 8: Outline Dimension Diagram
Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit 1122 Φ70 Φ70 Unit:mm 3.2 Outdoor Unit Unit:mm Technical Information... -
Page 9: Refrigerant System Diagram
Valve Capillary Strainer Service Manual 4. Refrigerant System Diagram COOLING Cooling and heating model Indoor unit Outdoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction Accumlator exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Capillary Strainer... -
Page 10: Electrical Part
Service Manual 5. Electrical Part 5.1 Wiring Diagram ● Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name White Green Jumper cap Yellow Brown COMP Compressor Blue Grounding wire YEGN Yellow/Green Black Violet Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. ●... - Page 11 Service Manual ● Outdoor Unit 600007000636 These wiring diagrams are subject to change without notice; please refer to the one supplied with the unit. Technical Information...
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Page 12: Pcb Printed Diagram
Service Manual 5.2 PCB Printed Diagram Indoor Unit ● Top view Name Interface of display Live wire interface of power supply Communication wire Fuse Indoor fan driven capacitor Neutral wire interface of cold plasma Neutral wire interface of power supply Interface of indoor fan Live wire interface of cold plasma... - Page 13 Service Manual Outdoor Unit ● Top view Input of transformer Terminal for 4-way valve Terminal for outdoor fan Terminal for compressor Output of transformer Terminal for high pressure protection Terminal for low pressure protection Terminal for outdoor ambient temp sensor Terminal for outdoor pipe temp sensor Terminal for communication...
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Page 14: Function And Control
Service Manual 6. Function and Control 6.1 Remote Controller Introduction Buttons on Remote Controller On/Off button Mode button Fan button ▲/ button Swing button Sleep button Temp button Turbo button I Feel button Timer button X-Fan button Light button Icon Display on Remote Controller Temp. - Page 15 Service Manual 1. ON/OFF button Press this button to turn on the unit. Press this button again to turn off the unit. 2. MODE button Each time you press this button,a mode is selected in a sequence that goes from AUTO, COOL, DRY, FAN, and HEAT *, as the following: * Note: Only for models with heating function.
- Page 16 Service Manual Function introduction for combination buttons Combination of " " and " " buttons: About lock ▲ controller is locked, is displayed. In this case, Press " " and " ▲ " buttons simultaneously 3s to lock or unlock the keypad. If the remote pressing any button, blinks three times.
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Page 17: Brief Description Of Modes And Functions
Service Manual 6.2 Brief Description of Modes and Functions 1. Summary (1) Buzzer When the controller is energized or receives signal from button (emergency operation switch on air conditioner) or remote controller, the buzzer will give out a beep. (2) Display ◆... - Page 18 Service Manual ③ Protection function ◆ Freeze protection During operation, when controller detected that Ttube≤0℃ for a consecutive period of time, the system enters into freeze protection. In that case, the compressor and the ODU fan stop operation, while the IDU operates at set fan speed. If freeze protection is released and the compressor has been out of operation for 3 mins, the unit will resume its previous operation status.
- Page 19 Service Manual ① Operation condition and process for fan mode In fan mode, the IDU fan motor operates at set speed, while the compressor and the ODU fan motor stop. 4-way valve is de-energized (4-way valve is not available for cooling only unit). Temperature setting range is 16~30℃ . ②...
- Page 20 Service Manual Clock timer: The precision of clock timer is 1minute. 24hours circulated timer can be set. ◆ Timer ON: If timer ON is set during operation of the unit, the unit will continue to operate. If timer ON is set at unit OFF, upon ON time reaches, the unit will start to run according to previous setting status.
- Page 21 Service Manual Vertical louver has 7 swing statuses: ◆ Stay at position L: control by remote controller: ◆ Stay at position A: control by remote controller: Set this position as starting point 0（0 ） ◆ Stay at position B: control by remote controller: ◆...
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Page 22: Part Ⅱ : Installation And Maintenance
Service Manual Part Ⅱ : Installation and Maintenance 7. Notes for Installation and Maintenance Safety Precautions: 10. If the power cord or connection wire is not long enough, please get the specialized power cord or connection wire Important! from the manufacture or distributor. Prohibit prolong the wire by yourself. - Page 23 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 keep the refrigerant circuit free from air or substances other than the specified refrigerant.
- Page 24 Service Manual Main Tools for Installation and Maintenance 1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill 4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner hexagon spanner 7. Electronic leakage detector 8.
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Page 25: Installation
Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall Space to the wall At least 15cm At least 15cm Drainage pipe Installation and Maintenance... - Page 26 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 Fix outdoor unit...
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Page 27: Installation Parts-Checking
Service Manual 8.2 Installation Parts-checking 8.4 Requirements for electric connection 1. Safety Precaution Name Name (1) Must follow the electric safety regulations when installing Indoor unit Sealing gum the unit. Outdoor unit Wrapping tape (2) According to the local safety regulations, use qualified Support of outdoor power supply circuit and air switch. - Page 28 Service Manual (3) Fix the wall-mounting frame on the wall with tapping screws 5. Connect the Pipe of Indoor Unit (ST4.2X25TA) and then check if the frame is firmly installed by (1) Aim the pipe joint at the corresponding bellmouth.(As show pulling the frame.
- Page 29 Service Manual reachable after finishing installation. Drain hose (4) For the air conditioner without plug, an air switch must be installed in the line. The air switch should be all-pole parting and the contact parting distance should be more than 3mm. Insulating pipe Fig.10 8.
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Page 30: Installation Of Outdoor Unit
Service Manual 8.6 Installation of Outdoor Unit (3) Pretightening the union nut with hand. 1. Fix the Support of Outdoor Unit(select it according to the (4) Tighten the union nut with torque wrench. actual installation situation) (1) Select installation location according to the house structure. Refer to the following table for wrench moment of force: (2) Fix the support of outdoor unit on the selected location with expansion screws. -
Page 31: Vacuum Pumping And Leak Detection
Service Manual Note: 2. Leakage Detection (1) The through-wall height of drain hose shouldn't be higher (1) With leakage detector: than the outlet pipe hole of indoor unit.(As show in Fig.25) Check if there is leakage with leakage detector. (2) Slant the drain hose slightly downwards. The drain hose (2) With soap water: can't be curved, raised and fluctuant, etc.(As show in Fig.26) If leakage detector is not available, please use soap water for... -
Page 32: Maintenance
Service Manual 9. Maintenance 9.1 Error Code Display Method Possible Causes(For specific maintenance Malfunction of Indoor Unit A/C Status method, please refer to the following procedure of Name (Error Code) troubleshooting) The unit will stop operation as it 1. The wiring terminal between indoor ambient temperature reaches the temperature point. - Page 33 Service Manual 1. The wiring terminal between outdoor condenser temperature sensor and maiboard is loosened or poorly The unit will stop operation as it reaches the temperature point. During contacted. Outdoor cooling and drying operation, the 2. There’s short circuit due to trip-over of the parts on discharge compressor stops operation while IDU temperature...
- Page 34 Service Manual 1. The communication line is not connected tightly or poorly contacted. Poor contact of any line may cause communication Communi- During cooling operation, compressor malfunction. cation stops while indoor fan motor operates. 2. The match between main board and display panel is malfunction During heating operation, the incorrect.
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Page 35: Procedure Of Troubleshooting
Service Manual 9.2 Procedure of Troubleshooting 1. Malfunction of Temperature Sensor Main detection points: ● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? ● Is there short circuit due to trip-over of the parts? ●... - Page 36 Service Manual 2. Malfunction of Blocked Protection of IDU Fan Motor Main detection points: ● SmoothlyIs the control terminal of PG motor connected tightly? ● SmoothlyIs the feedback interface of PG motor connected tightly? ● The fan motor can't operate? ●...
- Page 37 Service Manual 3. Malfunction of Protection of Jumper Cap Main detection points: ● Is there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● The motor is broken? ● Detection circuit of the mainboard is defined abnormal? Malfunction diagnosis process: Start Appearance of the...
- Page 38 Service Manual 4. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor Main detection points: ● Instant energization afte de-energization while the capacitordischarges slowly? ● The zero-cross detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: Start Turn power off for 1minute,the turn back on...
- Page 39 Service Manual 5. High pressure protection (E1) Start Are the display panel and main board Connect the display panel with the main board well Malfunction is eliminated. connected tightly? Are the OVC terminal on the main board connected Connect the OVC terminal on the main board with the high well with the high pressure switch on the complete Malfunction is eliminated.
- Page 40 Service Manual 6. Low pressure protection of compressor (E3) Start Is the terminal Re-insert it tightly of low pressure switch to ensure reliable inserted well ? contact. Is the malfunction eliminated ? Is the higher than the acting Add refrigerant . value of the low pressure switch? Is the...
- Page 41 Service Manual 7. High discharge temperature protection of compressor (E4) Start Check the system; System is abnormal (such as blockage) Problem is solved Eliminate the block- age inside the system Check wiring and Out door uni t’s mo tor is abnormal Problem is solved fan capacitor ;...
- Page 42 Service Manual 8. Overcurent protection (E5) Start Normal fluctuation is within 10% of the rated voltage on the Is the supply voltage unstable with big fluctuation? Malfunction is eliminated. nameplate Is the supply voltage too low with overload? Adjust the supply voltage to maintain it within normal range Malfunction is eliminated.
- Page 43 Service Manual 9. Communication malfunction (E6) Poor contact any line may lead to communication malfunction Installation and Maintenance...
- Page 44 Service Manual 10.Overload malfunction (E8) Start Outdoor and indoor heat Clean the outdoor and indoor heat exchangers Malfunction is exchangers are too dirty or the air eliminated. and remove blockage of air inlet/outlet. inlet/outlet is blocked. Fan motor is not working. Check motor and re-install the motor Malfunction is Abnormal fan speed;...
- Page 45 Service Manual 11. Overload Protection Compressor H3 Main detection points: ● Heat exchange of unit is not good? (heat exchanger is dirty and unit radiating environment is bad) ● Fan motor is not working? ● Too much load of the system causes high temperature of compressor after working for a long time? ●...
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Page 46: Maintenance Method For Normal Malfunction
Service Manual 9.3 Maintenance Method for Normal Malfunction 1. Air Conditioner Can't be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether it's due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t bright wait for power recovery. - Page 47 Service Manual 4. ODU Fan Motor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram firmly...
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Page 48: Exploded View And Parts List
Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit The component is only for reference;please refer to the actual product. Installation and Maintenance... - Page 49 Service Manual Part Code Description GWH28ACE-K3NNA1A/I Product Code CA497N00800 CA497N00802 Front Panel 200003000127T01 20000300012701B Filter Sub-Assy 11012007 11012007 Screw Cover 2425201906 2425201902 Left Side Plate 200085000011 20008500001101P01 Decorative Strip(Left) 230001000066 230001000066 Front Case 200002000030 20000200003001B Air Louver(Manual) 10512737 10512737 Helicoid Tongue...
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Page 50: Outdoor Unit
Service Manual 10.2 Outdoor Unit The component is only for reference;please refer to the actual product. Installation and Maintenance... - Page 51 Service Manual Part Code Description GWH28AAE-K3NNA1A/O Product Code CA476W02101 Front Grill 22415002 Front Panel 01535013P Axial Flow Fan 10335008 Drainage Connecter 06123401 Drainage hole Cap 06813401 Chassis Sub-assy 017000000171P Compressor and Fittings 009001000104 Right Side Plate Assy 0130329201 Valve Support Sub-Assy 01713098P Cut off Valve 07130239...
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Page 52: Removal Procedure
Service Manual 11. Removal Procedure Caution: discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit Step Procedure 1. Remove filter Panel Open the panel. Loosen the clasp shown in the fig and then pull the left filter and right filer Clasps outwards to remove them. - Page 53 Service Manual Step Procedure Panel 3. Remove panel Display Open the front panel; separate the panel Screws rotation shaft from the groove fixing the front panel and then removes the front panel. Note: The display of some models is fixed on Panel rotation the panel;...
- Page 54 Service Manual Step Procedure Cold plasma generator 6. Remove electric box assy Screws Loosen the connection clasps between Cold plasma generator and electric box, and then remove the cold plasma Electric box generator. Step motor Clasps Indoor tube Grounding temperature sensor screw Electric box assy ①...
- Page 55 Service Manual Step Procedure 7. Remove evaporator assy Remove 3 screws fixing evaporator assy. Screws Connection pipe clamp At the back of the unit, Loosen the clasp,connection pipe clamp and then remove the connection pipe clamp. Clasp Groove Rear Case assy First remove the left side of evaporator from Clasp the groove of bottom shell and then remove...
- Page 56 Service Manual Step Procedure 8. Remove motor and cross flow blade Remove 3 screws fixing motor clamp and then remove the motor clamp. Motor clasp Screws Cross flow Remove the at the connection place of Motor cross flow blade and motor; lift the motor and cross flow blade upwards to remove them.
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Page 57: Removal Procedure Of Outdoor Unit
Service Manual 11.2 Removal Procedure of Outdoor Unit Steps Procedure 1. Remove big handle,valve cover and top cover Remove the screw connecting the big handle and right side plate, and then remove the big handle handle. Remove the screw connecting the valve cover and right side plate, and then remove the valve screw cover. - Page 58 Service Manual Steps Procedure 2. Remove grille and cabinet Remove the 4 screws connecting the grille and outer case, and then remove the panel grille. screw grille Remove the screws connecting the outer case with motor support, isolation plate and chassis; lift the outer case upwards;...
- Page 59 Service Manual Steps Procedure 4. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the blade. axial flow blade 5.Remove motor support sub-assy and motor stopper motor support screw Remove the 2 screws connecting the motor support and chassis, and then loosen the stopper to remove the motor support.
- Page 60 Service Manual Steps Procedure 7. Remove clapboard Remove the screws fixing clapboard and then remove the clapboard. screw clapboard 8. Remove soundproof sponge Remove the soundproof sponge wrapping the compressor. soundproof sponge 9.Valve liquid valve and gas valve Unsolder the welding joint connecting the valve with capillary and condenser;...
- Page 61 Service Manual Steps Procedure 10. Remove 4-way valve assy Unsolder the welding joints connecting the 4-way valve assy with capillary sub-assy, 4-way valve assy compressor and condenser; remove the 4-way valve. Note: Before unsoldering the welding joint, wrap the 4-way valve with a wet cloth completely to avoid damage to the valve caused by high temperature.
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Page 62: Appendix
Service Manual Appendix: Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius （℃） Celsius （℃） Celsius （℃） temperature temperature temperature （℉）... -
Page 63: Appendix 3: Pipe Expanding Method
Service Manual Appendix 3: Pipe Expanding Method Pipe Note: Pipe cutter Improper pipe expanding is the main cause of refrigerant leakage.Please expand the pipe according to the following steps: Leaning Uneven Burr A:Cut the pip ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●... -
Page 64: Appendix 4: List Of Resistance For Temperature Sensor
Service Manual Appendix 4: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( C) Resistance(kΩ) Temp( C) 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... - Page 65 Service Manual Resistance Table of Tube Temperature Sensors for Outdoor and Indoor(20K) Temp( C) Resistance(kΩ) Temp( C) 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...
- Page 66 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( C) 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...
- Page 67 GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI Add: West Jinji Rd, Qianshan, Zhuhai, Guangdong, China 519070 Tel: (+86-756) 8522218 Fax: (+86-756) 8669426 Email: gree@gree.com.cn Http://www.gree.com HONG KONG GREE ELECTRIC APPLIANCES SALES LIMITED Add: Unit 2612,26/F.,Miramar Tower 132 Nathan Road,TST,Kowloon,HK Tel: (852) 31658898 Fax: (852) 31651029...
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