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Service Manual
GREE ELECTRIC APPLIANCES INC.OF ZHUHAI
Models:GWH18MC-K3DNA2E
GWH18MC-K3DNA3E
GWH18MC-K3DNA4E
GWH18MC-K3DNA5E
GWH18MC-K3DNA7E
GWH18MC-K3DNA7E
GWH18MC-K3DNA8E
GWH18MC-K3DNB3E
GWH18MC-K3DNB7E
GWH18MC-K3DNC1E
GWH18MC-K3DNC3E
GWH18MC-K3DNE4E
GWH24MD-K3DNA2E
GWH24MD-K3DNA3E
GWH24MD-K3DNA4E
GWH24MD-K3DNA5E
GWH24MD-K3DNA7E
GWH24MD-K3DNA7E
GWH24MD-K3DNA8E
GWH24MD-K3DNB3E
GWH24MD-K3DNC1E
(Refrigerant R410A)
(Electric heating belt)
(Electric heating belt)
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Summary of Contents for Gree GWH18MC-K3DNA2E
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Page 1: Service Manual
Service Manual Models:GWH18MC-K3DNA2E GWH18MC-K3DNA3E GWH18MC-K3DNA4E GWH18MC-K3DNA5E GWH18MC-K3DNA7E GWH18MC-K3DNA7E (Electric heating belt) GWH18MC-K3DNA8E GWH18MC-K3DNB3E GWH18MC-K3DNB7E GWH18MC-K3DNC1E GWH18MC-K3DNC3E GWH18MC-K3DNE4E GWH24MD-K3DNA2E GWH24MD-K3DNA3E GWH24MD-K3DNA4E GWH24MD-K3DNA5E GWH24MD-K3DNA7E GWH24MD-K3DNA7E (Electric heating belt) GWH24MD-K3DNA8E GWH24MD-K3DNB3E GWH24MD-K3DNC1E (Refrigerant R410A) GREE ELECTRIC APPLIANCES INC.OF ZHUHAI... -
Page 2: Table Of Contents
Table of Contents Summary and Features ..................1 1.Safety Precautions .................... 3 2.Specifi cations ......................4 2.1 Unit Specifi cations ....................4 2.2 Operation Characteristic Curve ................. 16 2.3 Capacity Variation Ratio According to Temperature ........17 2.4 Operation Data ...................... - Page 3 8. Exploded Views and Parts List ............45 8.1 Indoor Unit ......................45 8.2 Outdoor Unit ......................57 9. Troubleshooting ....................65 9.1 Precautions before Performing Inspection or Repair ........65 9.2 Confi rmation ......................66 9.3 Flashing LED of Indoor/Outdoor Unit and Primary Judgement ....
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Page 4: Summary And Features
Summary and Features Summary and Features Indoor Unit GWH18MC-K3DNA2E/I GWH18MC-K3DNA3E/I GWH24MD-K3DNA2E/I GWH24MD-K3DNA3E/I GWH18MC-K3DNA4E/I GWH18MC-K3DNA5E/I GWH24MD-K3DNA4E/I GWH24MD-K3DNA5E/I GWH18MC-K3DNA8E/I GWH18MC-K3DNB3E/I GWH24MD-K3DNA8E/I GWH24MD-K3DNB3E/I GWH18MC-K3DNC1E/I GWH18MC-K3DNB7E/I GWH24MD-K3DNC1E/I GWH18MC-K3DNC3E/I GWH18MC-K3DNE4E/I... - Page 5 Summary and Features GWH18MC-K3DNA7E/I GWH18MC-K3DNA7E/I GWH24MD-K3DNA7E/I GWH24MD-K3DNA7E/I Outdoor Unit GWH18MC-K3DNA7E/O GWH18MC-K3DNA7E/O (Electric heating belt) GWH24MD-K3DNA7E/O GWH24MD-K3DNA7E/O (Electric heating belt) Remote Controller YB1FA...
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Page 6: Safety Precautions
Safety Precautions 1.Safety Precautions Installing, starting up, and servicing air conditioner can be Make sure the outdoor unit is installed on a stable, level hazardous due to system pressure, electrical components, and surface with no accumulation of snow, leaves, or trash equipment location, etc. -
Page 7: Specifi Cations
Specifi cations 2.Specifi cations 2.1 Unit Specifi cations Model GWH18MC-K3DNA7E(Electric heating belt) Product Code CB172002501 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 5275(1260~6600) Heating Capacity 5850(1120~6800) Cooling Power Input 1600(380~2650) Heating Power Input 1620(350~2650) Cooling Power Current 7.25... - Page 8 Specifi cations Model of Outdoor Unit GWH18MC-K3DNA7E/O(Electric heating belt) Compressor Manufacturer/Trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMP Compressor Model SNB130FGYMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 27.00 Compressor RLA 8.40 Compressor Power Input 1245 Overload Protector 1NT11L-6578 Throttling Method Capillary Operation Temp ºC 16~30 Ambient Temp (Cooling)
- Page 9 Specifi cations GWH18MC-K3DNA2E GWH18MC-K3DNA3E Model GWH18MC-K3DNA4E GWH18MC-K3DNA5E GWH18MC-K3DNA8E GWH18MC-K3DNB3E CB181003300 CB171005000 CB161002900 Product Code CB162003100 CB173002600 CB163003900 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 5275(1260~6600) Heating Capacity 5850(1120~6800) Cooling Power Input 1600(380~2650) Heating Power Input...
- Page 10 Specifi cations Model of Outdoor Unit GWH18MC-K3DNA7E/O Compressor Manufacturer/Trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMP Compressor Model SNB130FGYMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 27.00 Compressor RLA 8.40 Compressor Power Input 1245 Overload Protector 1NT11L-6578 Throttling Method Capillary Operation Temp ºC 16~30 Ambient Temp (Cooling) ºC 18~45...
- Page 11 Specifi cations GWH18MC-K3DNB7E GWH18MC-K3DNC1E Model GWH18MC-K3DNC3E GWH18MC-K3DNE4E GWH18MC-K3DNA7E CB164001800 CB139002600 CB136000500 Product Code CB403000400 CB172002500 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 5275(1260~6600) Heating Capacity 5850(1120~6800) Cooling Power Input 1600(380~2650) Heating Power Input 1620(350~2650) Cooling Power Current 7.25...
- Page 12 Specifi cations Model of Outdoor Unit GWH18MC-K3DNA7E/O Compressor Manufacturer/Trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMP Compressor Model SNB130FGYMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 27.00 Compressor RLA 8.40 Compressor Power Input 1245 Overload Protector 1NT11L-6578 Throttling Method Capillary Operation Temp ºC 16~30 Ambient Temp (Cooling) ºC 18~45...
- Page 13 Specifi cations Model GWH24MD-K3DNA7E(Electric heating belt) Product Code CB172002601 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 6450(1400~7000) Heating Capacity 7000(1200~8200) Cooling Power Input 1985(350~2500) Heating Power Input 1930(350~2700) Cooling Power Current 8.80 Heating Power Current 8.56 Rated Input 2700...
- Page 14 Specifi cations Model of Outdoor Unit GWH24MD-K3DNA7E/O(Electric heating belt) Compressor Manufacturer/Trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMP Compressor Model SNB130FGYMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 27.00 Compressor RLA 8.40 Compressor Power Input 1245 Overload Protector 1NT11L-6578 Throttling Method Capillary Operation Temp ºC 16~30 Ambient Temp (Cooling)
- Page 15 Specifi cations GWH24MD-K3DNA2E GWH24MD-K3DNA3E Model GWH24MD-K3DNA4E GWH24MD-K3DNA5E CB181003400 CB171005100 Product Code CB161003000 CB162003200 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 6450(1400~7000) Heating Capacity 7000(1200~8200) Cooling Power Input 1985(350~2500) Heating Power Input 1930(350~2700) Cooling Power Current 8.80 Heating Power Current 8.56...
- Page 16 Specifi cations Model of Outdoor Unit GWH24MD-K3DNA7E/O Compressor Manufacturer/Trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMP Compressor Model SNB130FGYMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 27.00 Compressor RLA 8.40 Compressor Power Input 1245 Overload Protector 1NT11L-6578 Throttling Method Capillary Operation Temp ºC 16~30 Ambient Temp (Cooling) ºC 18~45...
- Page 17 Specifi cations GWH24MD-K3DNA7E GWH24MD-K3DNA8E Model GWH24MD-K3DNB3E GWH24MD-K3DNC1E CB172002600 CB173002700 Product Code CB163004000 CB139002700 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 6450(1400~7000) Heating Capacity 7000(1200~8200) Cooling Power Input 1985(350~2500) Heating Power Input 1930(350~2700) Cooling Power Current 8.80 Heating Power Current 8.56...
- Page 18 Specifi cations Model of Outdoor Unit GWH24MD-K3DNA7E/O Compressor Manufacturer/Trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMP Compressor Model SNB130FGYMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 27.00 Compressor RLA 8.40 Compressor Power Input 1245 Overload Protector 1NT11L-6578 Throttling Method Capillary Operation Temp ºC 16~30 Ambient Temp (Cooling) ºC 18~45...
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Page 19: Operation Characteristic Curve
Specifi cations 2.2 Operation Characteristic Curve Cooling Heating 220V 220V • Conditions Indoor : DB26.7˚C/WB19.4˚C Outdoor : DB35˚C/WB23.9˚C Indoor air flow : Turbo Pipe length : 5m 230V 230V 240V • Conditions 240V Indoor : DB21.1˚C/WB15.6˚C Outdoor : DB8.33˚C/WB6.11˚C Indoor air flow : Turbo Pipe length : 5m 10 20 30 40 50 60 70 80 90 100... -
Page 20: Capacity Variation Ratio According To Temperature
Specifi cations 2.3 Capacity Variation Ratio According to Temperature Cool i n i n g Conditions Conditions Indoor:DB26.7 C /WB19.4 Indoor:DB21.1 C /WB15.6 Indoor air flow:Turbo Indoor air flow:Turbo Pipe length:5m Pipe length:5m –1 5 –10 Outdoor tem p . (˚C) Outdoor tem p . -
Page 21: Noise Criteria Curve Tables For Both Models
Specifi cations 2.5 Noise Criteria Curve Tables for Both Models Indoor side noise when blowing Outdoor side noise High Super High Middle Indoor Fan Motor Rotating Speed Compressor frequency/Hz 18 24K... -
Page 22: Construction Views
Constrction Views 3. Construction Views 3.1 Indoor Unit Φ55 Φ55 Φ55 Φ55 Model 1007 Unit:mm... -
Page 23: Outdoor Unit
Constrction Views 3.2 Outdoor Unit... -
Page 24: Refrigerant System Diagram
Refrigerant System Diagram 4. Refrigerant System Diagram Heat exchanger 3-Way ( INDOOR ) valve Muffler 2-Way valve 4-Way valve Strainer Capillary Heat exchanger ( OUTDOOR ) Strainer Cooling Heating Refrigerant pipe diameter Liquid :1/4" (6 mm) Gas : 1/2" (12mm) -
Page 25: Schematic Diagram
Schematic Diagram 5. Schematic Diagram 5.1 Electrical Data Symbol Color symbol Symbol Color symbol BLUE BLACK YEGN YELLOW GREEN YELLOW WHITE VIOLET Symbol Parts name ORANGE BROWN PROTECTIVE EARTH 5.2 Electrical Wiring Indoor unit DISPLAY TUBE ROOM TEM.SENSOR TEM.SENSOR TUBE ROOM DISP1 DISP2... -
Page 26: Outdoor Unit
Schematic Diagram Outdoor unit 18K except GWH18MC-K3DNA7E/O (Electric heating belt) WA RNING Please don't touch any terminal when the aircondition is SA T COMP . running or during the 15 minutes after the aircondition 6YEGN stops to prevent the risk of electrical shock! COMP 4W H 5W H... - Page 27 Schematic Diagram 24k except GWH24MD-K3DNA7E/O (Electric heating belt) WARNING Please don't touch any terminal when the voltage of terminal P(DC+) and N(DC-) at AP1 is higher than 30V to prevent the risk of electrical shock! 6YEGN COMP OUTTUBE EXHAUST OUTROOM TEM.SENSOR TEM.SENSOR TEM.SENSOR...
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Page 28: Printed Circuit Board
Schematic Diagram 5.3 Printed Circuit Board Indoor unit TOP VIEW Copper pin Auxiliary heating terminal of 3 Fan capacitor 4 Protective tube 5 Health relay K3 6 PG motor terminal relay K1, K2 neutral wire Terminal of Terminal of tube Up&down swing PG feedback ambient... - Page 29 Schematic Diagram Outdoor unit(18k) TOP VIEW Compressor Electric expansion Compressor interface Temperature sensor overloadprotector valve Communication Outdoor fan 6 4-way 4-way valve interface with indoor Live wire valve unit Neutral wire 10 Earthing wire 11 Reactor interface 12 Reactor interface 2 BOTTOM VIEW...
- Page 30 Schematic Diagram Outdoor unit(24k) TOP VIEW Compressor overload Compressor interface Temperature sensor Electric expansion valve protector Communication interface Fan HALL interface Outdoor fan 4-way valve with indoor unit Live wire Earthing wire Neutral wire Reactor interface 1 PFC capacitor interface 1 Reactor interface 2 BOTTOM VIEW...
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Page 31: Function And Control
Function and Control 6. Function and Control 6.1 Remote Control Operations ON/OFF Press it to start or stop operation. MODE Press it to select operation mode (AUTO/COOL/DRY/FAN/HEAT). Press it to increase temperature setting. Press it to decrease temperature setting. Press it to set fan speed. Press it to set swing angle. -
Page 32: Digital Display
Function and Control LIGHT icon: is displayed by pressing the LIGHT button.Press LIGHT button again to clear the display. LOCK icon: is displayed by pressing "+" and “-” buttons simultaneously.Press them again to clear the display. SET TIME display: After pressing TIMER button, ON or OFF will blink.This area will show the set time. TURBO icon: is displayed when pressing theTURBO button.Press this button again to clear the display. -
Page 33: Replacement Of Batteries
Function and Control TIMER ON: Press this button to initiate the auto-ON timer. To cancel the auto-timer program, simply press this button again. After pressing this button, disappears and "ON" blinks . 0 0:00 is displayed for ON time setting. Within 5 seconds, press + or - button to adjust the time value. -
Page 34: Description Of Each Control Operation
Function and Control 6.2 Description of Each Control Operation 6.2.1 Functions of Indoor Unit 1.Basic function of system (1)Cooling mode 1.Under this mode, fan motor, swing will work under setting status, the temp. range is 16-30 (61-86 Fahrenheit scale) 2.Outdoor unit malfunction or unit stop running, indoor unit will keep origina l running status, malfunction displayed. 3.When 0 (Tset-Tamb.), if indoor fan motor is high speed, that the fan motorist running in middle speed, the middle speed or low speed will be maintained;(this condition should be executed when compressor start up);the super high speed will not rotate;... - Page 35 Function and Control 2. Display state of indoor indicators (1) State of indoor display board 1. When the unit is powered on, all patterns will be displayed and then only power indicator is on. When the unit is turned on with a remote controller, the operating indicator is on and operation mode which is set currently is displayed.
- Page 36 Function and Control (4) Sleep function This mode is effective only in cooling and heating modes. Proper sleep curves shall be selected for operation according to preset temperature. In cooling mode: (1) When initial temperature is set at 16-23 , an increase of 1 will be gained every hour after the sleep function is activated. After 3 is raised, the temperature will be maintained.
- Page 37 Function and Control (9) Locked Protection of PG Motor When starting up the fans, if the motor has run at a lower speed continuously for a period, for preventing automatic protection of the motor, stop running, and display the locked operation; if the machine is running at present, the code of the locked fault---H6 of double-eight digital tubes will be displayed;...
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Page 38: Cooling Mode
Function and Control 6.2.2 Functions of Outdoor Unit 1. Input Parameter Compensation (1) Input parameter compensation function As the structure feature of split unit, concerning the comfort, in heating mode, when compressor stops, the indoor ambient temperature is higher than preset temperature for 3 2. -
Page 39: Outdoor Fan Control
Function and Control 8.5 In all modes: once the compressor stops, it can’t restart within 3-minute (Note: The indoor units with memory function can be restarted after remote shutdown and powering on again without delay). 9. Outdoor Fan Control 9.1 When the unit is off by remote control in safety stops or stops after reaching the setting temperature, 1min later,the outdoor fan will stop;... - Page 40 Function and Control 16. Communication malfunction If the unit does not receive correct signal from indoor unit for 3min continuously, the unit will stop as communication malfunction protection; if communication malfunction has removed and compressor has stopped for 3min, the unit will resume running. 17.
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Page 41: Installation Manual
Installation Manual 7. Installation Manual 7.1 Notices for Installation Caution 1.The unit should be installed only by authorized service center according to local or government regulations and in compliance with this manual. 2.Before installing, please contact with local authorized maintenance center. If the unit isnot installed by the authorized ser vice center, the malfunction may not be solved due to incovenient contact between the user and the service personnel. - Page 42 Installation Manual Installation Site of Outdoor Unit 7.1.3 1.Select a site where n oise and outflow air emitted by the unit w ill not annoy neighbors. 2.Select a site where t here is sufficient ventilation . 3.Select a site where there is no obstruction blocking the inlet and outlet . 4 .The site s hould be able to withstand t he f ull weight and v ibration.
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Page 43: Installation Dimension Diagram
Installation Manual 7.2 Installation Dimension Diagram Space to the ceiling 15cm Above Space to the wall 15cm Above 15cm Above Space to the wall Above Above Air outlet side Space to the floor The dimensions of the space necessary for proper installation of the unit includ e the minimum permissible distances to adjacent parts . -
Page 44: Install Indoor Unit
Installation Manual 7.3 Install Indoor Unit 7.3.1 Installing of Mounting Plate 1.Mounting plate should be installed horizontally. As the water tray's oulet for the indoor unit is two-way type, during installation, the indoor unit should slightly slant to water tray's outlet for smooth drainage of condensate. 2.Fix the m ounting plate on the wall with s crews . -
Page 45: Install Outdoor Unit
Installation Manual NOTE: All wires between indoor and outdoor units must be connected by the qualified electric contractor. Electric wires must be connected correctly. Improper connection may cause malfunction. Tighten the terminal screws securely. After tightening the screws, pull the wire sligltly to confirm whether it's firm or not. Make sure that the electric connections are earthed properly to prevent electric shock. -
Page 46: Check After Installation And Test Operation
Installation Manual 7.4.2 Air Purging and Leakage Test 1. Connect charging hose of manifold valve to charge end of low pressure valve Manifold Valve (both high/low pressure valves must be tightly shut). Multimeter Manometer -76cmHg 2. Connect joint of charging hose to vacuum pump. Hi handle Lo Handle 3. -
Page 47: Installation And Maintenance Of Healthy Filter
Installation Manual 7.5.2 Operation Test 1.Before Operation Test (1)Do not switch on power before installation is finished completely. (2)Electric wiring must be connected correctly and securely. (3)Cut-off valves of the connection pipes should be opened. (4)All the impurities such as scraps and thrums must be cleared from the unit. 2.Operation Test Method (1)Switch on power and press "ON/OFF"... -
Page 48: Exploded Views And Parts List
Exploded Views and Parts list 8. Exploded Views and Parts List 8.1 Indoor Unit... - Page 49 Exploded Views and Parts list Part Code Description GWH18MC-K3DNA2E/I GWH18MC-K3DNA4E/I Product Code CB181N03300 CB161N02900 Front Panel Assy 20012283 20012280 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Baffl e Plate 26112228 26112228 Front Case Sub-Assy 20012288 20012288 Air Louver 1...
- Page 50 Exploded Views and Parts list Part Code Description GWH18MC-K3DNA5E/I GWH18MC-K3DNA8E/I Product Code CB162N03100 CB173N02600 Front Panel Assy 20012286 20012285 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Baffl e Plate 26112228 26112228 Front Case Sub-Assy 20012288 20012944 Air Louver 1 10512116 10512116 Air Louver 2...
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