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Final Draft Gree Installation and Service Manual 06-11-11_RK

1. 045 Installation commissioning and maintenance of a compres Refrigerant cylinder handling 046 a e le ue 012 Installation commissioning and maintenance Refrigerant pressure temperature 048 ele Tr 013 Installation commissioning and maintenance of evapora Flow of work for AC system installation service repair jo e PT MH ee PET 013 eje eMe r 013 AC system Installation sese 052 Description of the system and its components 014 Delivery conditions of indoor amp outdoor unit 052 General technical 014 Principle installation arrangement 053 xm 015 Tools equipment and accessories 054 ache Sieh wee ete Stee 016 Security advise for installation 055 Refrigerant transfer 017 Table of various installation height and resulting room SITZE 056 Capacity variation ratio according to temperature The installation site gt general informat
2. Indoor unit in stallation re quires the assis tance of another person Page 62 y outlet pipe of 2 indoor unit rubber belt 1 Connect the condensate pipe to the nozzle of the indoor unit The connec tion must be fixed with adhesive tape 2 Insert the condensing pipe into the piping hole sleeve 3 Lag the piping hole sleeve with a wide adhesive tape in order to prevent it from moving 4 Move the piping hole sleeve together with the condensate pipe through the wall duct ub d drain hose indoor unit rubber belt insulating tube rubber belt outlet pipe of 0 indoor T insulating tube Do not rise the drain hose Do not form the drain hose into the waved shape 2 50 mm 2 Or more Do not put the drain hose end into water GREE Service Manual GWCO9AA KSNNA6A Page 63 Running of connection pipe set Refrigerant transfer pipes liquid and gaseous refrigerant pipes and the connec tion cables for indoor and outdoor units are bundled to one common pipe set permanently connected to the indoor unit External connection Gas side pipe electric wire The unit is an INTRINSIC SAFE system Refrigerant charge is limited to 200 gram Top up of charge is not permitted Finally wrap it with tape Water drainage pipe Modification of pipe length is not permitted Lu I vLE The pipe set and the drain hose could be taken o
3. Length Q3 Not Permitted IN Connec tion Pipe Co N 00 N N N 00 00 O 20 GP Container Loading 90 Quantity GP 198 HQ lt O 0 a x x 5 15 o o UU Qe Q gt 3 3 O O 5 D D T Q oO Q D 40 5 U o GREE Service Manual 9 The unit is an INTRINSIC SAFE System Refrigerant charge is limited to 200 gram Top up of charge is not permitted Modification of system and in specific the pre assembled pipe length is not permitted Page 17 Capacity Variation Ratio According to Temperature Cooling Mode Only 9K 12K TELL 1779 Indoor DB27C WB19 C 60 Indoor air flow Super High Eee 50 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Capacity ratio Co Outdoor Temp Operation Data Temperature Condi Model Standard Heat Exchanger Indoor Outdoor tions in C Name Pressure Pipe Temperature Fan Fan Mode Mode Indoor Outdoor MPa T1 T2 Lc pem E E 8011 831038 High 860 0 6 Notes 1 Measure surface temperature of heat exchanger pipe around centre of heat exchanger path U Bend Thermistor Thermometer
4. The use of Gas Detectors de signed for HC Refrigerant is a SAFETY issue Regular Gas De tectors may not be safe for the use with HCs The HC gas de tector is part of a Personal Pro tection Equip ment PPE HC refrigerant has a higher spe cific volume than air therefore the refrigerants will fall when exposed to at mospheric pres sure This means leak detecting on the bottom sides of the piping or components can be effective Page 88 Leak Testing with OFDN and weak soapy water solution This method consists of pressurising the empty refrigerant circuit with a rea sonably high pressure of OFDN gas A pressure usually up to 10 bar 150 PSI is applicable The subsequently carried out Leak Test using a weak soapy water solution shall cover all potential areas of possible leakages Provide a filled Nitrogen cylinder containing OFDN gas equipped with reliable pressure regulator and Nitrogen transfer hose having a 4 SAE female adapter and with Schrader valve core depressor The warning sign is still placed in the work area because we are now handling a pressurised cylinder about 250 bar and OFDN gas is intentionally blown off from the system to the ambient area It is advisable to have an intermediate pressure gauge equipped with control valve within the Nitrogen transfer hose N to be separated from the pressure regulator and the OFDN gas cylinder This a
5. 096 Evacuation gt detailed 099 Charging with 100 Charging with refrigerant gt detailed description 101 Start up data sheet form for service and repair 102 GREE Service Manual GWCO9AA KSNNA6A Page 4 Abbreviations used within this manual GREE Service Manual GWCO09AA KSNNA6A Page 5 INTRODUCTION ATTENTION Please read this manual carefully before installing and operating the GREE Hydrocarbon Air Conditioner unit Careless installation and operation can cause severe injuries to operators workers and damage to the air conditioner unit itself Keep this manual in a location for easy access as it is needed for reference during installa tion maintenance service and operation of the unit This manual does not cover all aspects of installation maintenance and service of the chiller units if additional information is needed contact the GREE Costumer Service or Sales Office General Information Warning and cautions appear at appropriate locations throughout this manual book GREE Service Manual GWCO09AA KSNNA6A Page 6 General Safety Instructions Please pay careful attention to these safety instructions to avoid risks to people and property Before starting work on maintenance read this man ual thoroughly and pay particular attention to the releva
6. Absolute pressure kPa bar PSI kPa g bar g PSI g Temperature 1217 88 12 18 176 64 1117 88 11 18 162 14 1247 16 12 47 180 89 1147 16 11 47 166 38 1276 94 12 77 185 21 1176 94 11 77 170 70 1307 24 13 07 189 60 1207 24 12 07 175 10 1338 07 13 38 194 07 1238 07 12 38 179 57 1369 42 13 69 198 62 1269 42 12 69 184 12 1401 31 14 01 203 25 1301 31 13 01 188 74 1433 73 14 34 207 95 1333 73 13 34 193 44 1676 34 16 76 243 14 1576 34 15 76 228 63 1713 30 17 13 248 50 1613 30 16 13 233 99 1750 86 1751 253 94 1650 86 16 51 239 44 1789 02 17 89 259 48 1689 02 16 89 244 98 1827 79 18 28 265 10 1727 79 17 28 250 60 1867 17 18 67 270 81 1767 17 17 67 256 31 1907 17 19 07 276 62 1807 17 18 07 262 11 1947 80 19 48 282 51 1847 80 18 48 268 01 2116 75 21 17 307 01 2016 75 20 17 292 51 GREE Service Manual 9 KSNNA6A Page 50 Flow of Work for AC System Installation Service Repair and Dismantling The main concern for involved service personal is to avoid the release of any refrigerant during in stallation maintenance repair and service of the HC R 290 air conditioning system The following chart shall highlight important work flow activities and where specific care should take place Dismantling and Routine maintenance i disposal Installation ervice and Repair Requieres refrigerant handling or electrical repair Is system leake tight Check the working Check the working area area is safe
7. GREE Installation and Service Manual b Models GWC09AA KSNNA6A On behalf of R Federal Ministry for the Environment Nature Conservation 4 Deutsche Gesellschaft and Nuclear Safety f r Internationale Zusammenarbeit 617 GmbH of the Federal Republic of Germany GREE Service Manual GWCO9AA KSNNA6A Page 1 Imprint Funds The publication was funded by the German Federal Ministry for the Environment Nature Conservation and Nuclear Safety within the framework of the International Climate Initiative based on a decision of the German Federal Parliament Federal Ministry for the Environment Nature Conservation and Nuclear Safety BMU Programmb ro Internationale Klimaschutzinitiative Potsdamer Platz 10 10785 Berlin E Mail programmbuero programmbuero klima de Phone 49 0 30 408 190 218 Fax 49 0 30 408 190 303 Internet http www international climate initiative com Support The publication was supported by Deutsche Gesellschaft fur Internationale Zusammenarbeit GIZ GmbH German International Cooperation Programme Proklima Dag Hammarskj ld Weg 1 5 65760 Eschborn Germany Internet www giz de proklima Programme manager Bernhard Siegele Contact bernhard siegele giz de Authors GREE Electric Appliances Inc Rolf Huehren IKET GmbH Reviewers Dr Daniel Colbourne Dr Caroline Narayan Editors Rebecca Kirch Linda Ederberg GREE Service Manual GWCO9AA KSNNA6A Page 2 Ta
8. d B Low speed Medium speed ff High speed 6 3E Press this button to set up amp down swing angle which circularly changes as below Uu 5 4 5 All This remote controller is universal any command EY Is sent out the unit will carry out the command as 3L E indicates the guide louver swings as z iii A 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 e disappears and ON blinks 00 00 is displayed for ON time setting Within 5 seconds press or button to adjust the time value Every press of either button changes the time setting by 1 minute Holding down either button rapidly changes the time setting by 1 minute and then 10 minutes Within 5 seconds after setting press TIMER ON button to confirm OFF Press this button to initiate the auto off timer To cancel the auto timer program simply press the button again TIMER OFF setting is the same as TIMER ON CLOCK Pressing CLOCK button o blinks Within 5 seconds pressing or button adjusts the present time Holding down either button above 2 seconds increases or decreases the time by 1 minute every 0 5 second and then by 10 minutes every 0 5 second During blinking after setting press CLOCK button again to confirm the setting and then eo will be constantly displayed GREE Service Manual GWCO9AA KS
9. Requirements for earthing The system must be equipped with an effective equipotential bonding con ductor connection The yellow green wire is the earth wire and must not be used for other purposes at all It is not allowed to cut the wire or to fix the wire with screws Otherwise the risk of electric hazard increases Equipotential bonding protection earthing must be done whilst obeying the local rules and regulations The earthing resistance must not exceed 4 Ohms Otherwise an operation with combustible refrigerants is not allowed The connection to the circuit must be equipped with an earthing connec tion Do not connect the earthing wire to water or gas pipes or to other devices which would be pointed out as unsuitable by authorised person nel Earthing wires are not allowed to be switched The earthing must be con nected to the wall plug of the unit Miscellaneous 1 2 The wiring diagram of the required circuit wiring must be consulted during the connection of any kind of wires Before installation of the system ensure that existing laws and regulations of the local country regarding the wiring of air conditioning systems and earthing are known These rules and regulations are mandatory during installation The system is only for the operation done by children or persons with lim ited physical sensory or mental abilities and persons who do not posses the required skills or experience This group of people
10. and system is safe a a A a 4 _ x equieres braking into the system _ b SE D m med de 4 es e _ _ _ v E r _ _ _ c um E E E E h 5 pm u N EAN I nn y Pp d 2 4 T gt gt e a p d ee A 00 Is the system leak tight ps N 8 gt a nl li i ra a iy P roo n mm OM t 2 p p noe E Is the system leak tight es i 1 I _ T x 2 D D _ D 2 2 D p D D _ D D D p 2 E _ pe c _ pu 2 Y D _ U a f 4 L 2 C a p us m 7 gt xut _ D Ei _ _ c v E v _ E i 17 D mit AA LAT Tio zu ge 5 Sand N Indicates possible release uo of flammable refrigerant GREE Service Manual GWCO9AA K5NNA6A Page 51 Installation Important Notes The installation of the system is only permitted by trained personnel strictly following the local country rules and regarding the guidelines of this manual Please refer to a local authorised service centre before instal lation The same
11. 1 1 x PS 40 bar x 1 1 44 bar 4 4 MPa Procedures subsequent to the Pressure Test Strength Test A Refrigerant Leakage Detection Leak Test must be carried out after Pres sure Test Testing the system for leaks needs to pressurise the refrigerant circuit with the use of OFDN or if the equipment is available with a mixture of OFDN and Hydro gen 95 and 5 He called Forming Gas in connection with an electronic Trace Gas Leak Detector GREE Service Manual GWCO9AA KSNNA6A If piping compo nents or areas are covered by oil or you may hear the noise of escaping refrigerant rough leaks this may clearly indicate that there is a potential leak existing Replace and tighten valve caps otherwise leakage is guar anteed Page 86 Leak Check Bubble Test with a weak soapy water solution Leak Testing with the use of Weak Soap Solution with Water only is not a reli able comprehensive Leak Testing activity but in combination with other leak testing methods it is a simple sensitive technology Specifically the bubble test method would only be unsuitable if the system or section being tested is operat ing in a vacuum A soapy water solution can be used when you know the approximate area where a leak may exist and sufficient refrigerant pressure in the system is avail able In addition it may be noticed that there is oil covering the surface of the suspected leak spot Previously e
12. 17 18 19 Model of indoor unit GWCOSAA K5NNA4A I Diameter Length D x L 85x615 7 s IL gt mm 0 2A Ds wa mm mewemr _ I i n ININ N Co oO Co CO CO CO N I CO gt GREE Service Manual GWCOYAA KSNNA6A Page 15 Outdoor Unit 43 Model of Outdoor Unit of Outdoor Unit Model of Outdoor Unit GWCOYAA K5SNNA4A O ZHUHAI LANDA COMPRES Compressor Manufacturer Trademark m SOR CO LTD GREE Compressor Model QXD C184A030A emm Debe Toning ated Outdoor gt Fee O gt a p gt Zg A a gt A CO C1 N o TW GREE Service Manual GWCO09AA KSNNA6A Page 16 Climate Climate Type pete ff Moisture Protection IP24 Permissible Excessive Operating Pres sure for the Discharge Side Permissible Excessive Operating Pres sure for the Suction Side oound Pressure Level H M L ss Sound Power Level H M L Outdoor Unit Dimension WXHXD 848X540X320 Dimension of Carton Box L W H 878X360X580 Dimension of Package L W H 881X363X595 Refrigerant 290 Refrigerant Charge N N N O1 c N N N co
13. 25 Operate the vacuum pump by plugging in the power plug EE RM manifold gauge set e e e a E most of the remaining R 290 refrigerant from the AC system 28 End ofthe refrigerant recovery and venting process _ 29 A B C Valves at manifold gauge closed The vacuum Stop valves at the outdoor unit closed pump is used to recover the re 2 Disconnect the vacuum pumps plug connector from power maining HC socket outside the 2 m safety area refrigerant i from the AC sys Remove the venting hose from the vacuum pump Remove the tem manifold gauge set with hoses from the outdoor unit Place the recovery cylinder at the venting area where the flam For safety reasons the vacuum pump is switched ON and OFF by put ting in the plug mable gas warning sign is placed and open the gas valve to vent any remaining HC gas from the cylinder Drain the oil from the cylinder gas valve by holding the cylinder upside down in an appropriate container for used and contaminated lubricants into the socket Plug and socket are placed be hind the two 2 metre safety area The recovery cylinder for oil separation should be used regularly for this pur pose since the contamination with oil will not classify this cylinder for further activities with refrigerant if not cleaned inside professionally GREE Service Manual GWCO9AA KSNNA6A Page 80 Equipment for the use of Oxyg
14. Ensure ventilation of the work space during gas venting Do not inhale the escaping gas violation by acci dentally pressing 14 If there is no further flow of gas audible or sensible the process of out the glass system flushing is finished from the body manifolds sup To add an OFDN Holding Charge to the system start again with step Close the pressure regulators outlet valve High pressure Remove the OFDN transfer hose from the service port EE plied with sight glass can cause No 5 to No 12 and end with No 16 and No 17 of this course of activities A charged amount of about 5 bar is sufficient To provide a Holding Charge to the 16 HL Close the outdoor units low side and high side stop valves front system is seated position in case of no further actions to the system for the time being Close the OFDN cylinder valve Return the pressure regulators adjust ing handle screw in its back seated position Purge the pressure regulator from the outlet valve pressure regulator is now discharged GREE Service Manual GWCO9AA KSNNA6A Page 84 Providing a Hermetically Sealed Refrigerant Circuit Leak Strength and Tightness Testing General The sole purpose of this section is to raise awareness of the different methods to ensure a sealed system applicable for GREE Air Conditioners and to assist in determining the most appropriate one to use in different situations Analysing a system to be free of
15. Resistance C 90 4469 _ 99 3728 _ 8 121 _ 6 9827 _ 74 747 7 224 82 5146 114 Main Spare Parts List Below OEM parts should be provided only by GREE Electric Company or representatives Other spare parts than OEM parts will violate the Air Conditioner s safety classification and certification status and may keep the unit in a dangerous operational situation Once you haven t replaced the parts according to the requirement manufacturer won t bear any responsibility English Name Model Manufacturer Zhuhai Kaibang Motor Manufacture Fan Motor Indoor FN10D PG 1501211503 3 CO LTD Zhuhai Kaibang Motor Manufacture Fan Motor Outdoor FW35D 1501306714 7 CO LTD Jinmeijia Electronic Shenzhen Transforn 48X28 4311026102 Femme 491002 or sree Electric Appliances INC of Main Board M533F3 30135521 pe i Zhuhai G Electric Appliances INC of Cross Flow Fan 10352422P sin cR Gree Electric Appliances ING of Axial Flow Fan 10333004P Dp Zhuhai Changzhou Changheng Low pressure switch K 02 460200159 Asia Pacific Electric Appliance Co ltd T3 15AH 250V 46010055 Xiamen Ningly Electronics Co Ltd Compressor and fittings C184A030A p Zhuhai Lingda Compressor Co Ltd Compressor Protector 210 110 141 110 141A 1 Foshan Tongbao Co Ltd sree Electric Appliances INC of Sealed box Relay box Po 20182144 _ GREE Serv
16. and the vent line K to the gas port of the cylinder This connection enables oil to be separated in the cylinder during refrigerant venting process 15 L Open the suction side stop valve at the outdoor unit and both valves of the recovery cylinder mn A C valves at manifold gauge set Refrigerant starts venting 16 For safe venting of HC refrigerant and Oil Separation an EMPTY re and the flow of refrigerant can be easily and safely controlled by operation of valve A 17 This process should be carried out until no flow of refrigerant is covery cylinder determined Pressure at A C is Zero is needed ig Close the low side valve A at the manifold gauge set GREE Service Manual GWCO9AA KSNNA6A Page 78 Refrigerant Venting Part 2 After determining that there is obviously no flow of refrigerant venting from the outdoor unit a proportionally high residual amount of HC refrigerant is absorbed within the compressor lubricant and left in the system To empty the system from residual HC refrigerant as much as possible a vacuum pump should be connected to the system Disconnect the recovery cylinder oil separator from the system and install the vent line to the exhaust port of the vacuum pump The free end of the vent line remains on the stand as described on the previous page of this section Lowering the pressure in the system the residual refriger ant absorbed within the lubricant starts evaporating and g
17. the empty refrigerant circuit should be flushed with OFDN in order to assure that there is no remaining HC in the system but also to blow out other possible contaminants including humidity In case of no further actions to the system e g disassembly of indoor and outdoor unit for transport to the compa nies repair shop or an on site specific components replacement at a later date an OFDN holding charge should be supplied to the refrigerant circuit This is in general to avoid that air or humidity will be introduced into the system and cause contamination Provide a filled Nitrogen Cylinder containing OFDN gas equipped with reliable pressure regulator and Nitrogen transfer hose having a 4 SAE female adapter and with Schrader valve core depressor Secure the cylinder The warning sign is still placed in the work area because we are now handling a pressurised about 250 bar cylinder and OFDN gas is intentionally blown off from the system to the ambient area GREE Service Manual GWCO09AA KSNNA6A Never switch ON the AC system if charged with OFDN Page 83 Flushing the system and provision of a Holding Charge with OFDN Course of activities sequences Section Flushing with OFDN and provision of Holding Charge recommended Where Activities Carry out all intended works without hurry and THINK BEFORE ACTING AC system OFF unplugged and emptied from HC refrigerant Arrange you
18. 29 9 3138 Resistance Resistance L 60 37 28 67 34 73 2 358 74 228 77 40 797 1 933 1 544 48 5 809 145 50 1363 1282 56 GREE Service Manual GWCO09AA KBNNA6A 99 101 105 106 108 111 113 116 117 118 113 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 D e Resistance k Q 1 039 0 98 0 873 0 848 0 825 0 802 0 779 0 737 0 642 0 625 0 608 0 592 0 577 0 561 0 547 0 532 0 519 0 505 0 492 0 48 0 467 0 456 0 444 0 433 0 422 0 412 0 401 0 391 0 382 Resistance Table of Heat Exchanger Temperature Sensor for Indoor and Outdoor Unit Resistance 9 1046 T 8 97 6537 1 Ten 4 5346 _ 5 sos Tan e Co Ga om 4 Go Roy Temp Resistance k Q 25 20 GREE Service Manual GWCO09AA KBNNA6A Temp Resistance 65 4 14 T1 3 364 8 1875 _ o i888 2 a 189 _ Temp Resistance k 2 38 99 39 99 1386 17 ar os _ 113 Resistance Table of Compressor Discharge Temperature Sen sor Outdoor Unit Resistance 10 98 24 67 34 61 48 7 8 205 32 08 30 75 18 40 2615 24 13 23 19 mer 8 108 s 108 48 i906 GREE Service Manual GWCO09AA KBNNA6A Resistance Temp
19. Description No GWCDBAA K5NNAAA O Product Code CA115W12800 Front Grill 22413433 GREE Service Manual GWCO9AA KSNNA6A Page 129 Recommended Equipment and Tools for Hydrocarbon Refrigerants Servicing Item GREE Service Manual GWCO09AA KBNNA6A Oblig Ideal Altern Description Electronic leak detector far Hydrocarbon refrigerants witn flexible probe length of min 30 cm and with audible and visual alarms Sensitivity less than 50 pom of Propane Isobutane and Methane Response time 5 seconds Operating temperature to 50 C supplied with spare tips and rugged carrying Case Set of tracer gas leak detector for the use with tracer gas mixture of 9595 N2 and 596 H2 For leaks finding lt ler a and conformity with EN35422 EN14624 Complete set with tracer gas detector pressure regulator manifold gauge 2 Litre gas cylinder service hose and plastic case Set of tracer gas leak detector for the use with tracer gas mixture of 95 N2 and 5 H2 For leaks finding lt ler a and conformity with EN35422 EN14624 with digital display and leak indentification search mode Complete set with tracer gas detector pressure regulator manifald gauge 2 Litre gas cylinder service hose and plastic case Straight refrigerant hose system quick connector coupler Elbow refrigerant hose system quick connector coupler Sets of 4 valve manifold pressure gauges 3x1 4 and 1x3 8 connections p
20. TEMPSENSOR BUIWH E YEGNIGN p F e a RT2 RT AN Wi BU XTi Bl Ti ROOM DISP1 DISP2 w2 Wh 2 N2 ve OFAN gt 0 06 RELAY BOX PRINTED CIRCUIT BOARD YEGN w3 EGN EVAPORATOR EARTH PLATE OUTDOOR UNIT GREE Service Manual GWCO09AA KSNNA6A Page 22 Electrical Wiring Outdoor Unit These circuit diagrams are subject to change without notice please refer to the one sup plied with the unit OG YECN m W1OWH PRESSURI gt WIBU TERMINA CJ 2 W2BK eee ee CONNECTOR CONNECTOR RD BKIBU ROOM TEMPSENSOR FAN D YEGN SAT As EE OVERLOAD PROTECTOR GREE Service Manual GWCO9AA KSNNA6A Page 23 Printed Circuit Board top view ee q Witney re BH Gaj fee 7 NT CUN a CCPC Ls eee ee eh ee oe ee oe rs Br eee ARI Rep Interface Name Interface Neutral wire of PCB OUTROOM Outdoor ambient temperature sensor if TR IN oo Input Indoor ambient temperature sensor PG PG motor control PG motor control control 12 TUBE Indoor tube temperature sensor tube Indoor tube temperature sensor sensor INNER Relay box control TR OUT Transfor
21. checks for leakages include manual checks of the system and its operation conditions against the design operation conditions These activities will include analysis of the following parameters and conditions 1 System Pressure 2 Temperatures 3 Compressor Current Refrigerant Loss Indications shall be followed by comprehensive direct tightness testing method of the operational system by the use of the HC Leak Detector Refrigerant Loss Indicators are 1 All deviations from normal operation conditions analysed from the above mentioned indicators Any visible damage of the system Damage of pressure switch and sensors Corrosion and oil leaks Vibration abnormal noise ice formation Insufficient cooling capacity gt W Having these preconditions of a sealed system in mind in case of malfunction after any modification or repair to the AC system intervention into the refriger ant circuit at least the affected part refrigerant circuit piping or piping connections shall be subject for a strength test pressure test The strength test pressure shall not exceed the strength test pressure applied to components by the manufacturer During on site activities the complete AC system is sub ject for a pressure test The Pressure Test Value for the AC system Strength Test is at 1 1 times of the Maximum Allowable Pressure PS which is indicated at the outdoor units data plate Pressure Test Value
22. combination with a weak soapy water solution bubble test 2 Pressure test strength test of RAC systems 3 In mixed concentration with Hydrogen 95 Nitrogen and 5 Hydrogen as a so called Forming gas for Leak Test procedures in combination with Hydrogen Leak Detectors 4 Refrigerant circuit flushing to remove contaminants and e g to free blocked components and capillaries from obstructions 5 Purging of air from pipe work before heating and during brazing to pre vent formation of copper oxides on the inner surface of pipes 6 Purging refrigerants from pipe work and components during brazing to avoid production of extremely toxic acidic and harmful products 7 To be used as protective gas and charged a system or components for assembling to avoid introduction of air and humidity 8 To clean surfaces of heat exchangers e g condenser from dust and dirt In most of the above mentioned activities OFDN can deploy in addition its fa vourable capability to absorb a large part of remaining water content within a refrigerant circuit during system commissioning procedures Note Pressure regulators are designed to control the pressure and they are supplied with gauges to indicate pressure Regulators do not measure or control flow of the OFDN media unless the arrangement is equipped with devices metering valve or flow meter specially designed for those purpose GREE Service Manual GWCO9AA KSNNA6A The nitr
23. concentration in the air within the work environment By monitoring the air within the work environment the danger of a possible formation of flammable atmosphere can be detected early During the monitoring ensure that the gas detectors are suitable for hydrocar bon detection Never use open fire or a device with an ignition source for the detection of gas or for leak detection Before operation of the gas detector the instruction manual must be read care fully In case of any questions refer to the detector manufacturer Furthermore ensure the detector is correctly calibrated Instructions for calibration can be found in the instruction manual of the detector or upon request from the manu facturer A possible re calibration must be done within an area which is free of refrigerants In case of a positive detection by the detector any work must be stopped imme diately Any open flames or ignition sources must be extinguished or removed In addition to a suitable and approved HC gas detectors portable gas detectors can be used Such a detector can be clipped to clothing or placed on the floor within the work ing area It should be switched on for the duration of the work and set to alarm at 15 of the lower flammability level LFL to warn that flammable concentra tion may be nearby In this way technicians can be alerted whenever an inad vertent release of flammable refrigerant occurs and can immediately act upon the relevant emerg
24. evaporator 1 Air Temp leaving evaporator T2 Performance Test With appliance commissioning please operate the Split Air con ditioner with HIGH indoor fan speed in mode COOLING for a minimum of 15 Minutes Measure air inlet 1 and air outlet T2 temperature at the indoor unit The tempera ture difference should be at least 8 K Power Suppy Overall AmpereReadng OOS Current draw Functional AC system check including performance Check the system for refrigerantleakagel Check that electrical connections are tight Check that condensate drain is tight and with Check insulation of refrigerant transfer tubes and quick couple Flammable Refrigerant Check free run of condenser and evaporator fans Check system operation indoor outdoor on abnormal operational noise Clean system components including air filter if indicated Check display of the remote controller Execute briefing of the AC system user Company signature and date Client signature and date GREE Service Manual GWCO9AA KSNNA6A Page 102 Service Label to be place at the outdoor unit after service and repair Flammable Refrigerant R 290 Service Company EninerName 04505 O ades O _ Telephone amp FaxNo Registration No 0 O This System is charged with the natural and e
25. in order to keep out any unauthorised personnel It is useful to set up signs such as no smoking or access denied It is prohibited to store any combustible goods within the working environ ment Within two 2 metres radius ignition sources are not allowed in the work ing area Fire extinguisher dry powder must be easily accessible at any time During service work proper ventilation of the environment must be en sured oign plate to protect and mark the working area Appropriate detectors suitable for hydrocarbons must be available and opera tional all the time Appropriate tools and appliances must be available and ready for operation Any employees need to be instructed extensively about the safety measures and the possible safety hazard GREE Service Manual GWCO09AA KSNNA6A The HC leak de tector is indeed a Personal Protective Equipment PPE device Page 42 Refrigerant recovery Before starting service work on the refrigerant circuit the existing refrigerant must be removed When carrying out removal of the refrigerant the following must be considered e The recovery cylinder must be permitted for the use of R 290 especially regarding the pressure and the compatibility of the connectors and the valves e The recovery machine must be suitable for operation with R 290 Impor tantly the recovery machine must not itself be an ignition source e The filling of the recover
26. mode SE will be displayed During defrosting operation H1 will be displayed m icon d is displayed when pressing the X FAN button Press this button again to clear the display 25 FAN SPEED display Press FAN button to select the desired fan speed setting AU TO Low Med High Your selection will be displayed in the LCD windows except the AUTO fan speed Unit Functions ON OFF Press this button to turn on the unit Press this button again to turn off the unit MODE 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 AUTO COOL DRY FAN HEAT Note Only for models with heating function to After energization AUTO mode is defaulted In AUTO mode the set temperature will not be displayed on the LCD and the unit will automatically select the suitable operation mode in accordance with the room temperature to make indoor room comfortable Press this button to increase set temperature Hold it down for above 2 seconds to rapidly increase set temperature In AUTO mode set temperature is not adjustable n Press this button to decrease set temperature Hold it down for above 2 seconds to rapidly decrease set temperature In AUTO mode set temperature is not adjustable FAN This button is used for setting fan speed in the sequence that goes from AUTO ag to all then back to Auto Auto
27. nit The fan of the indoor unit is deceler ec LOW Po As to that please compare the following schedule Ipreset 2 C ME 22 temper anges between 16 to 306 On the display of the indoo the e and the temperature preset indicated GREE Service Manual GWCO9AA KSNNA6A Page 32 Protective functions Anti Freezing Protection The system is fitted with an anti freezing protection This prevents the evapora tor being covered with ice Additionally the system supervises the evaporator In case ice formation is detected the anti freezer is automatically activated By that the compressor and the outdoor unit fan are de energised while the indoor unit fan maintains running at the optional preselected speed Fixing the hazard of ice formation and having switched off the compressor for at least three minutes the system restarts in the formerly preselected mode By way of illustration please compare to the figure Antifr protectio eriad E Outdoor fan D A RUN STUP Indoor fan Overload Protection The system is equipped with an overvoltage protection that should avoid dam age to the systems components As soon as the system exceeds the permissible stress for three consecutive seconds the system will stop every function apart from the indoor unit fan which runs further If there won t be an overvoltage metered three minu
28. of the measured parameters It is very important to make use of an electronic gas detection device Take care that the electronic gas detector is designed and certificated for the use with flammable refrigerants Additionally the electronic HC gas detector must be part of the Personnel Protective Equipment PPE of the technician because if this device is operational in the work area it will warn by detection and signalling if HC refrigerant is in the atmosphere Handling of the refrigerant during installation maintenance servicing or recovery or venting Use scales to weigh refrigerant Knowledge of the requirements and procedures for handling storage and transportation especially of flammable refrigerants and especially of contaminated refrigerant and oils Safe HC refrigerant recov ery and venting Installation commissioning and maintenance of a compressor The basic functioning of a compressor including capacity control and lubricating system and risks of refrigerant leakage to its operation Installing a compressor properly including control and safety equipment Adjusting the safety and control switches Checking the oil return system otart up and shut down a compressor and checking the good working conditions of the compressor including by making measurements during operation of com pressor GREE Service Manual GWCO09AA KBNNA6A The use of OFDN Is important and the HC gas de tector is indeed a personnel pr
29. point under atmospheric pressure 42 Molar mass g mol 1 Critical temperature C Critical pressure bar Practical limit g m 8 Lower flammability level LFL g m GREE Service Manual GWCO09AA KBNNA6A HC R 290 refrig erant has a high grade of purity Propane as a cooking gas is not useful for refrigeration purpose Read More Guidlines for the safe use of hydrocarbon refrigerants GIZ PROKLIMA http www giz de proklima Page 38 Flammability Three components are needed simultaneously for causing fire 1 Oxygen 2 Ignition source and 3 The flammable concentration of HC For ignition the concentration of HC in air has to be between the lower and up per flammable limits If the concentration is below the lower flammability limit LFL of about 2 by volume in air there is not enough HC for combustion If the concentration is above the upper flammability limit UFL of about 10 there is insufficient oxygen for combustion Oxygen 0 to 100 UM 2 10 290 Refrigerant By way of illustration please compare to the schematic view Possible ignition sources are 1 for example from brazing torch halide torch leak lamp match or lighter cigarette 2 A spark from an electrical component 3 Static electricity 4 Hot surfaces Safety data Hazard Identification e Extremely flammable F e Readily forms an explosive air vapour mixtu
30. shall be connected to a point on the system furthest from the vacuum pump For the GREE HC Air conditioner service the connection at the manifold gauge set is indicated GREE Service Manual GWCO9AA Do not use the AC Systems refrigerant compressor or a compressor in general for vacuum proc essing A reliable dual stage vacuum pump is re quired Measure the vacuum re quired with an appropriate calibrated vac uum gauge Page 97 Monitor the evacuation procedure to maintain at least a required vacuum value of 375 Micron 0 5 mbar or 50 Pa or higher The time used for maintaining this value is related to the contamination of the system In case you cannot achieve this required vacuum level the following analysis should take place 1 Check the system connected tools and hose connections for any leak ages 2 Check the complete system for leakages 3 Otherwise there is a high content of water in the system For situation No 3 an additional flushing of the system with OFDN can support the evacuation procedure and decrease the time spent to maintain the desired vacuum level To ensure that there is no leak left in the system the desired vacuum level should be held without any significant rise during a 30 minutes time span whilst isolated valve C closed at the manifold gauge set and with switched off vac uum pump For the intention to carry out a multiple evacuation process to incr
31. should have a minimum of 12mm 7 internal diameter 5 Venting should only take place on the certainty that the refrigerant will not get blown back into any adjacent buildings and that it will not migrate to a location below ground level 6 The hose is made of material that is compatible for use with HC refriger ants and oil 7 device is used to raise the hose discharge at least 1 m above ground level so that the discharge is pointed in an upward direction to assist with dilution 8 Close to the inlet of the hose an oil separating device is fitted to present the emission of refrigeration oil so that it may be collected and disposed of properly following the venting procedure a recovery cylinder may be used for this 9 There must be no sources of ignition near the hose discharge 10 A flammable gas warning sign must be positioned close to the hose dis charge 11 hose should be regularly checked to ensure that there are no holes or kinks in it that could lead to leakage or blocking of the passage of flow 12 When carrying out the venting the flow of refrigerant should be metered using manifold gauges to a low flow rate so as to ensure the refrigerant is well diluted 13 The venting process has to be monitored for the entire time 14 Once the refrigerant has ceased flowing the system must be flushed out with OFDN if not then the system should be pressurised with OFDN and the venting procedure carried out two or more tim
32. socket is outside the 2 m safety area This will avoid Sparking within the safety area with the operation of the ON OFF switch 10 B C Open manifold gauge valves vacuum pump refrigerant cylin D der vacuum gauge The refrigerant cylinder valve is left closed but the charging hose will be evacuated during this process 12 Obtain a vacuum of 375 Micron 0 5 mbar 50 as indicated by the vacuum gauge 1338 B o O Closed manifold gauge valve vacuum pump Switch off vacuum pump remote from plug Observe vacuum gauge if pressure rises for about 30 minutes If the pressure rises but does not reach the atmospheric pres sure Zero it indicates humidity in the system Open B and prolong evacuation process If the pressure rises to 0 bar gauge 1 bar absolute or 100 kPa this will indicate that there is a leak in the refrigerant circuit the unit connections or the manifold gauge and hose assem Check system or connections for leaks The vacuum pressure stays stable A C Closed manifold gauge valves low pressure refrigerant charg D ing vacuum gauge Refrigerant circuit is evacuated and ready for charging with re frigerant GREE Service Manual GWCO9AA KSNNA6A Page 99 Charging with 290 refrigerant Remember that the GREE HC Air conditioner is an intrinsic safe system where modifications of the refrigerant circuit are not acceptable Th
33. swing flap angle light temperature preset and fan speed Having reconstructed the power supply after a blackout the system will continue its operation corresponding to the filed parameters If there has been a timer adjustment which has not yet worked out the system recalculates the timer du ration with the assistance of the stored information and will perform adequately The clock timer cannot be saved GREE Service Manual GWCO09AA KSNNA6A Page 37 HC R290 refrigerant issues Basics HC R 290 propane is an odourless and colourless gas of the group of hydro carbons HC R 290 is heavier than air and at high concentrations can cause narcotic effects and eventually asphyxiation R 290 is highly flammable within the range of 2 1 and 9 5 by volume or 38 g m to 170 g m in air The auto ignition temperature is about 470 Since R 290 is an odourless and colourless gas it is difficult to perceive that it is present as with most other refrigerants Propane is often used as a fuel such as for heating or barbecues However for use on refrigeration systems fuel grade propane is not suitable since it contains high levels of impurities which would damage the refrigeration system and may not provide the desired refrigerating capacity or efficiency H The structural formula of HC R 290 propane NH H H HH Important refrigerant properties and parameters Molecular formula Melting point Boiling
34. the tools needed for installation This list ment including only mentions the minimum tools required for works including maintenance and service to the units references and pictures see page 130 Spirit level To make sure that the mounting plate is installed horizontally oe Co femea 79 neranonaman roten sron arame Combination wrenches set Used for connecting the nuts 1 adjustable wrenches Used for connecting the valve s nuts and the pipe set GREE Service Manual GWCOYAA KSNNA6A Page 54 Security advise for installation During the installation activities the installation site and the place of mounting needs to be ventilated well No unauthorised person should enter the installation area during installation ac tivities Do not close the doors or windows Do not use open fire especially cigarettes no brazing units or open cooking during installation Avoid static charge by wearing cotton clothes and cotton safety gloves Place the leak detector or HC gas alerter detector operational in the installa tion area If there appears a leak within the refrigerant circuit increase the air ventilation at the installation side Stop any work immediately and switch off the electrical power supply If damage occurs to the system during installation refer to the local service cen tre Switch off cell phones during installation Take care that any other ele
35. time and listen for any audible pressure loss at every step of adjustment Watch the gauge The Pressure Test Value for the AC system Strength Test is at 1 1 times of the Maximum Allowable Pres sure PS which is indicated at the outdoor units data plate When the pressure test value of 44 bar 4 4 MPa is reached close the pressure regulators outlet valve and the cylinder valve Listen for any au dible pressure loss and watch and note the pressure at the gauge Wind the pressure regulators pressure adjusting handle in back seated position pressure regulator is now discharged Carry out a Leak Test by covering potential brazed joints mechanical unions or piping with the weak soapy water solution and carefully search 13 for bubbles Additionally the amount of discharging Nitrogen will indicate a leak by creating a venting noise Repeat the Bubble Test until you are confident that no leaks exist Use a small mirror for places that are difficult for assessment Pressure Test Value 1 1 x Remove the OFDN transfer hose from the service port PS 40 bar Carefully open the service ports Schrader valve using valve de 44 bar 4 4 MPa pressor e g a small screw driver and blow out the Nitrogen charge If 15 necessary hold a piece of old cloth or paper into the flow stream to keep eventually escaping oil from the system Do not inhale the escap ing gas Ensure ventilation of the work space during gas
36. would lead to short circuits or fire Do not exceed the maximum torque of the connection in order to avoid leakage Make the connection of the refrigerant piping as mentioned below Remove the rubber plug from the valve at Connect the female connector of the pipes to male connector of the unit Tighten all fittings with torque wrench and open end spanner Obey strictly the tightening torques in the chart listed Open the gas valve and the liquid valve with an Allen key Check all mechanical joints by an electronic gas detector for leakages refer to further information on page 88 of this document Connect the electrical wiring between the indoor and outdoor unit and affix them by using a cable strap so that the connection cannot shift SEO Der cr oO Mechanical Connectors at Pipes with Tightening torque Nm Liquid side piping Smaller diameter NA D N 0 En wrench A c m ES Liquid valve 5 9 j L 9 5 I IT AL P i GREE Service Manual GWCO9AA Gas valve Remove the valve cover from the outdoor unit First Leak Check Remove the sealing cap from the pipes interconnected Adjust the connection pipes components The Quick Coupler Valves To interconnect the Pipe Set for refrigerant transfer liquid line and suction line Quick Coupler are used All parts used for AC system assembling are pre charged with
37. 1 172 03 181 70 191 62 201 81 21227 223 00 234 00 245 28 256 85 268 70 280 85 293 29 306 04 Gauge pressure bar g PSI g 0 11 1 61 0 16 2 32 0 21 3 05 0 26 3 81 0 32 4 59 0 37 5 40 0 43 6 23 0 49 7 09 0 55 7 98 0 61 8 89 2 93 42 54 3 06 44 39 48 HC Refrigerant R 290 Gauge pressure Temperature Absolute pressure kPa g bar g PSI g F 419 09 4 19 60 78 319 09 3 19 46 28 432 45 4 32 62 72 332 45 3 32 48 22 446 13 4 46 64 71 346 13 3 46 50 20 460 13 4 60 66 74 360 13 3 60 52 23 4 392 535 10 5 35 77 61 435 10 4 35 63 11 55112 5 51 79 93 451 12 4 51 65 43 567 49 5 67 82 31 467 49 4 67 67 80 584 22 5 84 84 74 484 22 4 84 70 23 601 31 6 01 87 21 501 31 5 01 72 71 618 77 6 19 89 5 518 77 5 19 75 24 1 1 1 45 59 73151 132 106 10 631 51 6 32 91 59 751 68 7 92 109 02 651 68 6 52 94 52 772 25 7 12 112 01 672 25 6 72 97 50 793 24 7 93 115 05 693 24 6 93 100 55 836 46 8 36 121 32 736 46 7 36 106 82 4 814 64 8 15 118 16 714 64 7 15 103 65 976 53 9 77 141 64 876 53 8 77 127 13 1001 45 10 01 145 25 901 45 9 01 130 75 1026 83 10 27 148 93 926 83 9 27 134 43 1052 68 10 53 152 68 952 68 9 53 138 18 1079 00 10 79 156 50 979 00 9 79 141 99 3 87 8 1105 79 11 06 160 38 1005 79 10 06 145 88 GREE Service Manual GWCO09AA KSNNA6A Page 49 0 50 1 2 3 5 59 6 7 8 9 0 68 1 2 3 5 77 6 7 8 9 0 86 1 HC Refrigerant R 290 Gauge pressure
38. 2 Connection piping conditions Liquid Suction fixed at 5 m d P Suction Pressure of refrigerant measured at service port connection 4 T1 Inlet and Outlet Temperature of evaporator pipe surface Tempera ture 5 2 Inlet and Outlet Temperature of condenser pipe surface Tempera ture Modification of pipe length is not permitted GREE Service Manual GWCO09AA KSNNA6A Page 18 Construction Views All Dimensions in mm Indoor Unit Wall Mounted Plate GREE Service Manual GWCO9AA KSNNA6A Page 19 Outdoor Unit P Miis D TU IL n 1 GREE Service Manual GWCO09AA KSNNA6A Page 20 Refrigerant Flow Diagram Designation 1 wma __ GREE Service Manual GWCO09AA KSNNA6A Page 21 Schematic diagram Do not modify Electrical Data electrical com ponents or Meaning of Marking wiring for replacements Only use OEM e Indoor Unit spare parts Symbol Colour Symbol Symbol Colour of Symbol Ro Red 8k Bak YEGN Yellow Green e X Protective Earth e Outdoor Unit Symbol Colour of Symbol Protective GN Electrical Wiring Indoor Unit These circuit diagrams are subject to change without notice please refer to the one sup plied with the unit a a dL ES dL LL c dc ee dcl curn LLL PIPE com agg POWER TEMPSENSOR
39. EN 28 374 Kat lll HC refrigerant venting hose 1 2 29 with vacuum pump connector and dilutor Hard top too box for electricians consisting of size 450x360x190mm 15 kg cover plate and insert pocket VDE universal pliers 180mm VDE flat nose pliers 160mm VDE side cutter pliers 160mm VDE insulation stripping oliers 160mm VDE cable knife cable knife with hook blade saw screw drivers set for slotted screws 2 5x80 3 5x100 5 5x125 6 5x150 Philips screw drivers and PH2 Pozidriv PZ1 and PZ2 voltage tester screw driver Two pin voltage tester mains tester Display optic LEDs metering capacity 400V AC DC 1 000V AC IP54 31 Clamp On Ammeter Digital 400 A AC current Voltage 600 AC Voltage 600 DC Resistance 20MOhm 32 Capacity tester 0 50 uF LCD 1 8 0 6 A AC Current Accuracy Includes Test Leads Carrying Case Battery and Instructions GREE Service Manual GWCO9AA KSNNA6A Page 134 GREE Service Manual GWCO9AA KSNNA6A Page 135 GREE ELECTRIC APPLIANCES INC OF ZHUHAI Add Jinji west Rd Qianshan Zhuhai Guangdong China Tel 86 56 8522719 After sale Service Dept Post code 519070 GREE Service Manual GWCO9AA KSNNA6A Page 136
40. Exploded view of the outdoor 128 Venting gt course of activities gt part 2 079 Part list of the outdoor 129 Venting gt part 2 gt detailed procedure 080 Recommended equipment and tools for the use with HC ease areas Equipment for the use of OFDN Nz in the field 081 Flushing the system with OFDN 083 Flushing the system and provision of holding charge with OFDN gt detailed 084 Provision of a hermetically sealed refrigerant circuit 085 Leak strength and tightness 085 Leak check bubble 087 Electronic gas 088 Leak testing with OFDN amp weak soapy water solution 089 Leak testing with OFDN and bubbles detailed proce 090 Trace gas N2 H leak detection method 091 Trace gas leak detection gt detailed 093 Pressure test strength test with 094 Pressure test strength test gt detailed procedure 095 Refrigerant circuit gt Evacuation and
41. Incomplete combustion may form carbon monoxide Accidental Release Measures Immediate emergency action e Clear people away from the area to a safe place Do not operate electrical equipment unless Ex rated e Summon the emergency services e Treat or refer casualties if necessary Further actions e Stop release e Use dry powder or carbon dioxide extinguishers e Cool containers exposed to fire by using water mist spray Further action when release is made safe e Extinguish all naked lights avoid creating sparks e Position fire fighting equipment e Cover drains and disperse vapour with water spray Note vapour may col lect in confined spaces GREE Service Manual GWCOYAA KSNNA6A Page 41 The handling of 290 Due to the flammability of R 290 and the risk of fire or explosion during servic ing special safety rules must be followed during operation In order to avoid damage for people and property particular requirements are listed hereafter Before servicing the unit the surrounding area were the work will be done must be clear of safety hazards to ensure safe working Nevertheless it is required to carry out a risk assessment in order to minimise the risk of ignition of R 290 The following safety measures must be followed 1 Any employees and other present persons must be informed about the service and the way the service is done first It is recommended to isolate the working environment
42. NNA6A Page 29 Pressing X FAN button in COOL or DRY mode the icon io is displayed and the indoor fan will continue operation for 10 minutes in order to dry the indoor unit even though you have turned off the unit After energization X FAN OFF is defaulted X FAM is not available in AUTO FAN or HEAT mode TEMP Press this button could select displaying the indoor setting temperature or indoor ambient temperature When the indoor unit firstly power on it will display the setting temperature if the temperature s displaying status is changed from other status to displays the ambient temperature 5s later or within 5s it receives other remote control signal that will return to display the setting temperature if the users haven t set up the temperature displaying status that will display the setting temperature TURBO Press this button to activate deactivate the Turbo function which enables the unit to reach the preset temperature in the shortest time In COOL mode the unit will blow strong cooling air at super high fan speed In HEAT mode the unit will blow strong heating air at super high fan speed This function is not applicable for some models SLEEP Press this button to go into the SLEEP operation mode Press it again to cancel this function This function is available in COOL HEAT Only for models with heating function or DRY mode to maintain the most comfortable temperature for you LIGHT Press LIGHT button to
43. ap on the controller Please install a correct jumper cap Malfunction is eliminated Insert the jumper cap tightly Is the jumper cap inserted correctly and tightly Yes Replace it with a jumper cap of the Malfunction is eliminated same model Malfunction is eliminated Replace the control panel GREE Service Manual GWCO09AA KSNNA6A Page 108 Trouble Shooting for Freeze Protection According to the below provided diagram identify the possible malfunction related to the freeze pro tection and E2 error code indication E2 is displayed Is there poor air return flow from the indoor unit Remove Ice from Malfunction is Ye evaporator by eliminated Switch off only Solve the problem of speed alfunction is eliminated Ye Clean the Problem is Ye irtv Is the evaporator dirty evaporator solved Yes Replace the is normal but the indoor tube temperature temperature sensor is sensor abnormal Problem is solved Ye Yes Replace the controller GREE Service Manual GWCO9AA KSNNA6A Page 109 Trouble Shooting for Compressor Low Pressure Protection According to the below provided diagram identify the possible malfunction related to the compressor low pressure protection and error code indication E3 is displayed Check that the essure switch terminal is connected tight
44. applies when removing an existing and installed system to another place Delivery conditions of Indoor and Outdoor Unit The system components are delivered in a pre installed condition With delivery the two main components indoor and outdoor unit are pressurised and con tain the complete HC R 290 refrigerant charge amount of the functional AC sys tem For installation besides mounting the indoor and the outdoor unit it is only necessary to make the connection between the two units with the already in stalled and pressurised refrigerant transfer pipes and electrical connection ca bling The HC R 290 AC delivery package consist of the following components The Indoor Unit with attachments mounting support remote controller and documentation THF FE i FF ih n ij il pus B D GREE Service Manual GWCO09AA KBNNA6A All components are pressurised and precharged with HC R 290 refrigerant Page 52 Principle Installation Arrangement A Indoor Unit Condenser fan Refrigerant piping and electrical mounted unit transfer tube connections Air outlet Shadow zone for outdoor unit in evaporator stallation GREE Service Manual GWCO9AA KSNNA6A Page 53 Detailed list of Tools equipment and accessories tools and equip The following list is a description of
45. as preselected the flap will move matching the preset between D and L position There are 7 possible adjust ments to be chosen look ahead in addition to L A B C D and O De energising the system the flap will move to zero position Please note If the position is set by the remote control unit between and B A and C or B and D the air outlet flap anyhow goes between the positions L and D O 09 GREE Service Manual GWCO9AA Page 36 Display Activating the indoor unit every icon will beam In stand by condition operation indicator will shine red Starting the system by the remote control unit the op eration indicator is ON and the corresponding icons will appear in the actual mode COOLING DRY FAN Error Codes H6 Error Code Error codes illuminate with specific system failure or components deficiency Indicates low conditions speed or not functional out Please refer to page 105 for decoding of the specific error codes door unit fan Refer page 105 and 107 for fur ther error code When starting the fan if the motors rotational speed is slow for a period of time clarifications the unit will display LOCKED and stop running to avoid auto protection of the compressor motor If the system is energized the indoor unit will display H6 Locked protection to Outdoor Unit fan motor PG motor Memory function The system memorises the files for the different system modes air
46. ation The system should not be mounted at the following sites because of the existing danger of outer influences for a risk of malfunction or failure In cases when in stallation to these sites is unavoidable first contact the GREE Co service part ner 1 2 Places with strong heat sources combustible gases vapours or volatiles Places evoking high frequency waves e g by radio equipment medical or welding equipment 3 Places with an unusually high salt content in the air 4 5 Places next to hot sources or geysers because of sulphite gases could be Places with oil containing air dissolved in the air Any other places with specific but comparable conditions to those men tioned above In case of any doubts refer to the manufacturer or to an authorised service centre GREE Service Manual GWCO9AA European stan dard EN378 1 International Standard IEC 60335 2 40 Page 56 The installation site outdoor unit 1 Choose the installation location in a way that noise from the system or out going air from the system neither jeopardises nor bothers neighbours ani mals or vegetation Make sure to choose an installation location which has free airflow sufficient air volume and is dry Avoid direct sunlight or locations which are subject to strong winds Make sure that walls can stand the weight of the unit and can handle the associated vibration Consider the dimensions
47. ation other than the nor mal known working conditions during operation 2 Check the refrigerant circuit Connect a low pressure gauge with a refrig erant hose to the 1 4 SAE service port of the outdoor unit Confirm that the female 1 4 hose connection provides a correct adjusted core depressor to enable the opening of the Schrader valve inside the service port 3 Measure the suction pressure the suction pressure must be within a range of 4 to 6 bar gauge pressure The system must not be operated outside the normal running parameters If it is found that the measured values differ from these value it may indicate a malfunction of the system or indicate a deficit of refrigerant 4 Search for leakage with an electronic gas detector 5 After several seconds close the liquid valve at the outdoor unit in order to pump the refrigerant to the high pressure side of the system pump down This will enable the disconnection of the low pressure gauge and hose from the low pressure valve of the outdoor unit without loss of refrigerant Check the pressure of the LP gauge if the pressure is at 0 bar or slightly above remove the gauge with the hose from the LP stop valve 6 Open the stop valve at the liquid side of the system again 7 Put back again the sealing caps to the valves and the service port 8 Finally carry out the search for refrigerant leakage After switching off the system check for the electrical insulation resis
48. ator con denser thermostatic expansion valves Understanding how to read a refrigerant flow chart and an electrical circuit dia gram The determination of non condensable gases in the refrigeration system and how to eliminate them The importance of the use of oxygen free dry nitrogen OFDN for system flush ing leak test and strength test The elimination of humidity from the refrigeration system and how to recover or vent HC refrigerant from a system Usage of tables and diagrams log p h diagram saturation tables of a refriger ant diagram of a single compression refrigeration cycle and interpretation of these tables and diagrams Knowledge of the basic operation of the following components in a refrigeration system and their role and importance for refrigerant leakage prevention and identification Temperature and pressure controls Sight class and moisture indicators Defrost controls reverse cycle operation System protectors Measuring devices such as the pressure gauge manifold Thermometer Leak detector Refrigerant charging devices Vacuum pump Oxygen free dry nitrogen cylinder and pressure regulator Fault finding analysis and repair e Knowledge of flammable refrigerants e Risk analysis for the application of flammable refrigerant and properties of flammable refrigerants e Electrical circuit assessment and repair GREE Service Manual GWCO9AA Get your Best Practices knowledge and
49. ble descent that the com pressor is not located inside the deeper laying part of the unit The distance of the outdoor unit to the wall shall not be less than 300 mm Keep in mind that no exhaust air warm air from other installations shall enter the out door unit Furthermore make sure that the outdoor unit is mounted tightly enough in order to resist strong winds In areas with a large amount of snow it is recommended to place a roof above the outdoor unit GREE Service Manual GWCOYAA KSNNA6A Page 65 Interconnection of indoor and outdoor unit Consider the following remarks when interconnecting the functional pipe set Install the functional pipe set carefully and protect it against movement Make sure on behalf of the construction side that no tractive forces can arise Under no circumstances shall the piping by modified The wires must be connected correctly A wrong connection could lead to dam Modification of ages of the system A wrong connection of the earthing wire could lead to seri refrigerant trans ous health damage caused by electric shock Connect the wires securely and fer pipes is not reliably Check the stability of the connection Check wire screws in case of permitted loosening during transport Avoid any damage to the wiring Make sure that the plate of the housing and the connections are tightly closed This needs to be done in order to prevent mist or humidity from entering Other wise this
50. ble of Content 1 Abbreviations used with this 005 Other adjustments and functions of the remote controller 035 era E 006 Hydrocarbon refrigerant R290 issues 038 General Safety Instructions ecce 007 Refrigerant properties parameters 038 The symbols used in this 007 i nt ME 039 009 Hazard identificatiohi so dte 039 Iis talla ON SINC ian dose 009 First ad teas Ul eS anue tec beta 040 MIDIEIUETIHEOOTITSIZQ 010 Fire fighting 041 Minimum requirements for service personnel qualifica Accidental release 041 011 Basics I AG Ob nca aC aed 011 The handling of HC 290 042 Checks for putting in 012 Refrigerant 043 Checks Tor leakage nee 012 Repar ol leaks cari ET 044 Handling ot retigeranb 012 Refrigerant gas
51. cannot be repaired immediately the refrigerant charge should be removed from the system until the point at which the leak can be properly repaired Repairs must be done principally using the following procedures Removing the refrigerant from the system in order to avoid an uncontrolled discharge Examine the leak source determining the reason for the leak and carry out the proper course of action Repair properly NO temporary repairing Based on the results of the systems examination suitable measures need to be identified in order to avoid a recurrent appearance of the leak Before embarking on the repair ensure that the refrigerant has been re moved and the system flushed with OFDN especially if brazing is to take place After each intervention into a refrigeration system repairing leaks replac ing components brazing the system must be subject to a leak test and following strength test of the system GREE Service Manual GWCO09AA KBNNA6A Regular professional brazing experience is an important pre condition for the work with hydrocarbon refrigerants The use OFDN is an important precondition for professional leak repair System flush ing from HC Inert gas braz ing Leak testing Strength test ing Cleaning blowing agent Page 44 Gas detection While servicing the unit it is recommended for the whole period of work be fore during and after to monitor the gas
52. ce table of page 111 to 113 Replace temprerature sensor with same OEM part Malfunction is eliminated Replace PCB with same OEM part GREE Service Manual GWCO9AA KSNNA6A Page 106 Trouble Shooting for the PG motor According to the below provided diagram identify the possible malfunction related to the indoor fan PG motor and H6 error code indication H6 is displayed Stir the fan blade with a hand when the unit is switched off Reinstall the motor and the blade to make it rotate smoothly Does the blade rotate unsmooth Is the malfunction eliminated Is the eedback terminal o PG motor loose Insert the Ye feedback terminal tightly Is the malfunction eliminated No ANO Insert the Ye control terminal tightly Is the control terminal of PG motor loose Yes Is the malfunction eliminated Switch on the unit measure within one min after the louvers are opened the output voltage between pin 1 and 3 on the control terminal of the PG motor is over 180VAC Replace the fan motor Is the malfunction eliminated Mainboard malfunction Replace it GREE Service Manual GWCO09AA KSNNA6A Page 107 Trouble Shooting for Jumper Cap Malfunction According to the below provided diagram identify the possible malfunction related to the Jumper Cap C5 is displayed Is the jumper c
53. ctric de vices such as TVs microwave ovens are switched off during installation For installation service and repair always provide a dry powder fire extinguisher within the work area Before installation The system contains exactly 200 grams of HC R 290 refrigerant charge For se curity reasons the room for the installation of the indoor unit must have a mini mum of room size This is set to the system of GWHO9AA K5NNA6A at 7 minimum with 1 8 metre installation height Refer to the room size selection ta ble on the following page Assure yourself about the admissible minimum amount of room area be fore installation Before you unpack the system from the transport box keep the HC leak detec tor ready Open up the transport box and produce only a small hole first into the foil in which the system is shrink wrapped Place the gas detector inside the wrapping and make sure that the detector does not identify the presence of any gas Should there be a gas detection refer immediately to the local service centre in order to organise a replacement system Now unwrap the components Examine the delivered parts for damages GREE Service Manual GWCO9AA KSNNA6A For this specific AC unit the in door room size should be at a minimum of 7 m 900 CO gt Table of various installation height and resulting room size 185 0 The Installation Site general inform
54. d with a common protective shell Since the connection lines have a length of 5 m the lead through should be executed with the assis tance of another person Inside gt Outside Caulking 2674 ho Wall pipe O85 Mounting of the condensate pipe Make sure that the condensate pipe is always mounted with a natural descent to the outside 5 descent is recommended Furthermore make sure that the con densate pipe is neither bent nor kinked Both bent and kinked could obstruct the correct flow of the condensate If it is not possible to realise a descent condensate pump must be installed If condensate is drained to the sewerage the condensate pipe must be equipped with a siphon in order to prevent a noise pollution or any other nuisance In case the outdoor unit is operated at low ambient temperatures or if the pipe may be subjected to ambient temperatures below 0 C condensate pipe must be protected against icing The condensate pipe must be isolated against water from condensation If condensate is drained to a storage container the container must not be sealed Otherwise back pressure will rise up and will therefore obstruct the cor rect flow of the condensate The end of the condensate pipe must not touch the maximum level of the con densate inside the container After installation the condensate pipe must be checked for density by testing the pipe with rinsing water GREE Service Manual GWCO9AA
55. diagram see page 58 during installation in or der to achieve good accessibility for maintenance and services and to re duce the risk for material assets Mount the unit out of the reach of children Make sure that walkways are not blocked and that there are no negative influences to the skyline In case of any doubts refer to the responsible authority in the country where the installation is done In some countries special laws and restrictions for the mounting of split air conditioning units may apply The installation site indoor unit Choose an installation site according to the dimensions see page 58 diagram 1 2 pics Make sure that condensate can flow out easily Keep in mind that the pre installed pipe set is exactly 5 m and no modifi cations are permitted to shorten or to lengthen the refrigerant tubes and that connections to the outdoor unit are easy to be set up Easy access to the indoor unit must be ensured for maintenance and ser vicing purposes such as a change of the filters The indoor unit should be mounted out of the reach of children Make sure that the installation position of the indoor unit can handle the weight of the unit and the associated vibration At best no additional noise pollution should be generated Keep the unit away from heat sources flammable and explosive materials The air inlet and outlet vent should not be obstructed make sure that the air can be blown thro
56. e controller or control panel is available but the unit won t act H C U During cooling and drying operation compressor and outdoor fan stop while indoor fan operates F1 F2 F3 6 5 8 2 The complete unit stops GREE Service Manual GWCO9AA Possible Causes 1 The wiring terminal between indoor ambient tempera ture sensor and controller is loosened or poorly con tacted 2 There s short circuit due to trip over of the parts on controller 3 Indoor ambient temperature sensor is damaged Please check it by referring to the resistance table for temperature sensor 4 Main board is broken 1 The wiring terminal between indoor evaporator tem perature sensor and controller is loosened or poorly contacted 2 There s short circuit due to the trip over of the parts on controller 3 Indoor evaporator temperature sensor is damaged Please check it by referring to the resistance table for temperature sensor 4 Main board is broken 1 The wiring terminal between outdoor ambient tem perature sensor and controller is loosened or poorly contacted 2 There s short circuit due to the trip over of the parts on controller 3 Outdoor ambient temperature sensor is damaged Please check it by referring to the resistance table for temperature sensor 4 Main board is broken 1 The feedback terminal of PG motor is not connected tightly 2 The control terminal of PG motor is not connect
57. e industrial standard and this means that the inner environment of the system is absolutely clean For first field instal lation of the new air conditioning system the use of a vacuum pump is not nec essary For After Sales servicing procedures the diagram on the previous page indi cates the arrangement of equipment and tools and the interconnection with re frigerant hoses for drawing a vacuum at the system and finally charging with re frigerant These are activities in general where flammable refrigerant can be present Please refer to page 75 and respect the temporary flammable zones for your intended work activities and arrange for the safety area of 2 metres within your work space see page 74 Keep in mind that before evacuation and charging of the system the filter drier has to be changed The process of drawing a vacuum evacuation Before charging a refrigerant circuit of any RAC system with refrigerant a good vacuum should be drawn This is in general to remove non condensable gases such as air nitrogen or forming gas and to dehydrate the system Under no circumstances shall the system compressor or another refrigerant compres sor be used as a vacuum pump The reason for this is on the one hand a refrig erant compressor cannot achieve the vacuum required and on the other hand the AC systems compressor can be damaged by operation in a vacuum Favourable equipment specifications for system evacuation are as follows 1 Alway
58. eakage atthe new components 7 The setof AC componentsiscompete 7 78 instalation tools and equipment is preparedandin place Power connection socket at the right place 10 Electrical instalation is safe and according he local requirements 71 instalation 712 There are no sources ot ignition within the range ot wo meres 13 Wammsomaepaed Freoxingusherispresemn 115 Other persons in tne area are informed actviies 118 Mobile phoneisswichedof 117 Power socket of instalation tools are more than wo away 18 HC eak detecioris placed andinoperaton LC GREE Service Manual GWCO09AA KSNNA6A Page 59 Safety measures concerning electrical equipment 1 Electrical operations and installations are only allowed to be done by an authorised professional person according the local requirements and di rectives Connect the air conditioning system to a separate fused circuit Do not strongly pull the electric wires Any parts of the system must be integrated in effective equipotential bond ing conductor connection The unit needs to be secured against short cir cuit and overload Ensure a safe distance of at least 1 5 m to combustible materials Make sure any electric wires live wire neutral wire protection earth wire are installed to their specific function The wrong wiring leads to fire or damage of the system or even to an overheating of the wires
59. ease the dry ness level within the system do not break the vacuum with refrigerant Only use OFDN for this purpose Solenoid Valve and 4 SAE male flare connection Oil mist Filter with Venting Hose adapter UU ITE 54V DIGITAL VACUUM GAUGE Example Vacuum Pump Electronic Vacuum Gauge Example Vacuum Hose for Micron Hg mbar Pa with SAE connections indication GREE Service Manual GWCO9AA KSNNA6A Page 98 Section Refrigerant Circuit Evacuation Steps recommended No Where Activities __ _ __ _ ____ afo Carry out all intended works without hurry and THINK BEFORE ACTING AC system OFF unplugged and emptied from HC refrigerant OFDN or forming gas necessary purge any left overpressure from the system Arrange your tools and equipment connections as indicated on page 96 Ensure that the refrigerant hose E with the connection at the suction line service port L consists of a core depressor to open the service port inner core valve during connection The warning sign is still placed in the work area D Manifold gauge valves are closed Open the stop valves at the condensing units high and o L amp H low side 6 Open the manifold low pressure valve 7 Operate the vacuum pump by plugging in the power plug Note that placing the vacuum pump at work site should be in mode but not connected to the electrical socket The elec trical
60. ed tightly 3 Fan blade rotates roughly due to improper installation 4 Motor is not installed properly and tightly 5 Motor is damaged 6 Controller is damaged There s no jumper cap on the controller Jumper cap is not inserted properly and tightly Jumper cap is damaged Controller is damaged 1 Controller is damaged 1 Poor air return in indoor unit 2 Abnormal fan speed 3 Dirty evaporator 4 System is normal but the indoor tube temperature sensor is abnormal or the tube temperature sensor is not connected well 1 The main board and display panel are not connected well 2 The LPP terminal on the main board is not connected well with the high pressure switch on the complete unit 3 The wiring of the high pressure switch is loosened High pressure switch is damaged or poorly contacted 4 Insufficient or leaking out refrigerant 5 The LPP input is at high level Page 105 Trouble Shooting for the Temperature Sensor According to the below provided diagram identify the possible malfunction related to the tempera ture sensor Insert the temperature sensor tightly Is the wiring terminal between temperature sensor and controller loosely or poorly contacted Malfunction is eliminated Make connections upright Is there a short circuit due to trip over of connector at PCB Malfunction is eliminated s the temperature sensors resistance value according to the resistan
61. en Free and Dry Nitrogen OFDN in the field of RAC Servicing Practices Nitrogen is a natural gas and does not contribute to environmental pollution in general if vented to the atmosphere Nitrogen is tasteless odourless and colour less and consists of 78 08 within the air we breath In addition Nitrogen is non flammable and does not support combustion For refrigeration technologies Nitrogen is available in both liquid and gaseous form The nitrogen OFDN we commonly use for servicing refrigeration and air conditioning systems is sup plied and transported in high pressure cylinder Commonly RAC used OFDN cylinder are specified as follows bar m Purity 4 0 OFDN gas is of 99 99 and a water content of maximum of 30 ppm Cylinder Content Litre Cylinder gross weight ca kg 10 200 15 7 20 200 37 0 90 200 77 7 For the use RAC installation servicing and maintenance technologies only use OFDN gas and cylinders in combination with a reliable and appropriate pressure regulator to safely reduce the pressure of the gas to a controlled level The OFDN gas must only be transferred into the refrigerant circuit by the use of transfer hose designed and certificated for this purpose For most cases refrig erant transfer hoses may have this classification Check your refrigerant hoses for reliable use with pressurised OFDN gas OFDN gas in refrigeration is used in general for the following activities 1 Leak test in
62. ency procedures Portable HC Gas Detector GREE Service Manual GWCO09AA KBNNA6A The HC leak de tector is indeed a PPE device Page 45 Cylinder handling R 290 is available in a large variety of different cylinders which are to be distin guished whether they are refillable or not Most refillable cylinders are equipped with pressure relief valves often with own special construction of valves in order to distinguish them from the cylinders of different refrigerants Often special legal requirements about the handling of flammable refrigerants exist in the different countries These requirements must be studied and ad hered to Principally the following regulations in dealing with R 290 cylinders ap ply Do not remove or destroy official stickers of the cylinder Close the cylinder with a cap any time the cylinder is not used Never expose the cylinder to direct heat Do not repair or modify the cylinder or the cylinders connections Only use suitable equipment for transportation of the cylinder even for short distances Never roll the cylinder across the ground Take appropriate measures in order to prevent impurities water or oil from entering the cylinder 7 Should it be necessary to warm the cylinder only use warm water or air in which the temperature must not exceed 40 C 104 Open flames or ra diant heaters are not allowed at any time 8 Weigh the cylinder and compare it against the tare weight no
63. ended performance Ensure that any tools and installation debris are removed from the units Switch on circuit breakers after the installation is completely finished Check the correct connection and the electrical wiring once again Make sure that all valves are opened Switch on the system for first operation Press the ON OFF button of the remote control in order to start the unit By pressing the MODE button switch the system through the different modes of operation COOL DRY FAN in order to find out about the cor rect operation of the unit in all modes 7 Check the system operation for at least 15 min 8 Afterwards check the indoor and the outdoor unit for the following aspects mentioned below Indoor unit 1 Activate all buttons of the remote controller and confirm that they evoke the requested effects compare pages 27 to 30 2 Confirm that all lights and displays operate 3 Confirm that the actuating drive of the air flow louver operates properly 4 Confirm that condensate drains without any obstruction 5 Measure the entering air and the leaving air temperature of the indoor unit with start up and at the end of the 15 minutes test 6 Finally the measured temperature difference across the indoor unit air inlet and air outlet should be at about 8 K GREE Service Manual GWCO9AA KSNNA6A Page 68 Outdoor unit 1 Confirm that there is no anomalous noise or vibr
64. ent supports and vibration elimination Knowledge about the designing and dimensioning of the different refrigeration system sec tion pipes including risers The behaviour of lubricants within the refrigeration system and the influences of the dimensioning of pipe work in relation to lubri cants Develop strategies to minimise mechanical connections like flaring or flanges and to provide a sealed hermetic system GREE Service Manual GWCO09AA KBNNA6A Preventive maintenance will improve the sys tem efficiency Regular professional brazing experience is an important pre condition for the work with hydrocarbon refrigerants Page 13 Description of the system and its components Unit Specifications GWCO9AA K5NNA4A General Technical Specifications Split type On Off A Parameter Value Ite N Product Code mM CA115012800 Rated Voltage 220 240 0 4 Power Supply Mode Indoor 5 Cooling Capacity 2650 CO U lt O OD Q TI O D 5 O lt N Heating Capacity NA 7 Cooling Power Input 883 mE Heating Power Input NA Cooling Power Current 3 92 10 Heating Power Current Rated Input 995 12 Rated Current 4 41 13 Air Flow Volume SH H M L SL m h 480 460 420 380 14 Dehumidifying Volume L h EER 3 0 SEER NA HSPF NA Application Area 12 18 GREE Service Manual GWCO09AA KSNNA6A Page 14 15 16
65. es to ensure that there is minimal HC refrigerant remaining inside the system GREE Service Manual GWCO09AA KBNNA6A Page 76 Refrigerant Venting Part 1 Connect the manifold gauge as indicated below to the service port of the out door unit LP valve port A enables to vent the HC refrigerant at a low flow rate in an easy to control manner The venting of the HC refrigerant takes place via a two valve access port equipped recovery cylinder which will act in this spe cific case as an oil separator The vent line is connected at the gas valve of the recovery cylinder The release of refrigerant transfers lubricant from the outdoor unit will now remain in the recovery cylinder The end of the 5 m vent line is placed on about 1 m high stand to ensure better dilution of HC refrigerant in air during the venting process A flammable gas warning sign must be positioned close to the hose discharge port to indicate that there is an occurrence of flammable gas during venting ac tivity DANGEROUS AREA FLAMMABLE GAS Vent Line Recovery Cylinder with 2 Valve access GREE Service Manual GWCO9AA KSNNA6A Page 77 HC Refrigerant Venting Course of activities sequences 1 Section Refrigerant Venting Steps recommended for part 1 No wnere actwiies THINK BEFORE ACTING enone dicated on page 77 Manifold gauge valves closed C D AC system OFF unplug
66. etectors 1 Check your device at least once a year to ensure reliability and accuracy Your equipment supplier can guide you on how to carry out calibration In most cases it is possible to use a reference leak source for calibration 2 Know your gas detector s capabilities and also what it is not capable of de tecting 3 Carbon monoxide and alcohol can affect the sensitivity of most electronic gas detectors Be sure neither is present when checking for leaks 4 For optimum leak detection hold the sensor head as close as possible over the refrigerant transferring pipe Move the sensor head slowly along the pipe with a maximum of 1 cm per second of speed 5 Mechanical connections screwed unions or other connections must be scanned slowly move the sensor head right around the complete connection point 6 When the Gas Detector indicates a leak it is advisable to hold the sensor head away from the leakage site spot identified for approximately 5 sec onds Then check whether the device indicates a leak at the same spot again Repeat this procedure step by step three times This will verify if a leak really leak exists 7 During other work activities with HCs installation service maintenance place the Gas Detector on the floor of your work area and the device can act as a HC Gas Warner Sensor Head Example of a Gas Detector designed and safe for the use with HC refrigerants GREE Service Manual GWCO9AA
67. ets transferred with the vacuum pump and vent line to the ambient A flammable gas warning sign must be positioned close to the hose discharge port to indicate that there is an occurrence of flammable gas during venting ac tivity 3 1 DANGEROUS AREA FLAMMABLE GAS Vent Line GREE Service Manual GWCOYAA KSNNA6A Page 79 HC Refrigerant Venting Course of activities sequences 2 Section Refrigerant Venting Steps recommended for part 2 use of vacuum pump Close gas and liquid valve of the recovery cylinder Disconnect 19 the vent line from the gas port of the recovery cylinder oil separator See sequence 1 from page 78 20 Remove the refrigerant hose from the liquid port of the recovery cylinder Close valve C Place the vacuum pump and connect a 7 vacuum hose The vacuum pumps On Off switch is in ON position Plug and 21 socket of the vacuum pump are not connected and placed be hind the two 2 metre safety area This will avoid sparking within the safety area with the operation of the OFF switch 22 K Connect the vent line to the exhaust port of the vacuum pump There should not be a noteworthy overpressure remaining 23 within the AC system except the out gassing refrigerant from the compressors lubricant Note that higher remaining refrigerant overpressure from 24 the AC system will damage the vacuum pump during op eration
68. for GREE Split Air Conditioner Installation Company Address Telephone amp Fax Technician Name Registration No Client Company Contact Person Installation Appliance DATA Model and No Date of Installation Repair Comments Repair Operating Data Cooling Mode Refrigerant Type R 290 Refrigerant Name Refrigerant charge 0 200 kg Suction Pressure 1 Suction Temperature equivalent 1 Air Temp Entering Condenser T3 Air Temp Leaving Condenser T4 DEE Air Temp Entering Evaporator T1 Air Temp Leaving Evaporator T2 Flammable Refrigerant Performance Test With appliance commissioning please operate the split air conditioner with HIGH indoor fan speed in mode COOLING for a minimum of 15 MINUTES Measure air inlet 1 and air outlet 2 temperature at the indoor unit The temperature difference should be at least 8 K Electrical Data Power Supply Voltage Overall Ampere Reading Current draw Compressor Other executions for system commissioning Tick box for completion Only use correct and reliable tools equipment for system commissioning Functional AC system check including performance test Check the AC system for refrigerant leakage Check that electrical connections are tight Check that condensate drain is tight and with down grade Check insulation of refrigerant transfer tubes and quick coupler Check free run of condenser and evaporator fans Check system operation indoor outdoor on abnor
69. g an electronic leak detector has indicated a leak exists in a particular area of the hermetically sealed system Mechanical connections will be the first choice to look for leaks in general Many different types of soap solutions are available on the market Some tech nicians create their own soapy water solution Some purchase bubble test bottles and may have a pen brush to apply the solution to the suspected point of leakage A small brush is the best cleanest way to work with soapy water on RAC systems Some brands may provide weak soap water solutions in a spray bottle to cover quick large areas of pipe work or components for leak finding Some soap solutions consist of an antifreeze mixture to avoid frosting of the solution on sys tem parts The advantage of most commercially produced solution for bubble test is that they have a lower density to make them even more sensitive to very tiny leaks Hints for the use of weak soap solutions 1 If the system does not contain sufficient pressure for leak detection the re frigerant can be recovered from the system and the system re pressurised with OFDN to increase the pressure 2 Probably in some cases the escaping Nitrogen is audible and indicates the leakage location 3 Do not pressurise the system or component to be checked more than the manufactures leak testing standards This pressure is usually stated on the data plate as Maximum Allowable Pressure 4 1 most cases fo
70. ged Place a warning signboard in front of your work area and the end of the vent line to indicate that flammable refrigerant gas will be vented to the environment and that no unauthorised peo ple may enter the safety work area Smoking and open flames are prohibited No other sources of ignition must exist within this area including your cell phone Place your HC leak detector on the floor close to your tools ar rangement Switch on the leak detector If HC refrigerant is de tected you will hear the warning signal projected time span to maintain all service activities intended job are in place Confirm that the circumstances for the intended job are safe Provide a hose with a length of a minimum of 5 metres actual needed length will be according to installation site condition and an inner diameter of a minimum of 12 mm E L Assure that the refrigerant transfer hose with the connection at 13 the suction line service port L consists of a core depressor to Consider that the service port of the suction side stop valve is equipped with a Schrader valve Hose connection must have an adjusted core depressor to open the Schrader valve core correctly open the service port inner core valve during connection Interconnect the EMPTY recovery cylinder with manifold and vent line The refrigerant hose G must have access to the liquid 14 port of the cylinder dip tube
71. gen charge If necessary hold a piece of old cloth or paper into the flow stream to keep eventually escaping oil from the system Do not in Remove the OFDN transfer hose from the service port hale the escaping gas Ensure ventilation of the work space during gas venting Leave a slight overpressure in the system 15 If a leak was found in step 12 repair the leak or replace the leaky component and continue with steps 5 and 7 to 14 Close the outdoor units low side and high side stop valves front 5 seated position um GREE Service Manual GWCO9AA Close the OFDN cylinder valve Return the pressure regulators adjust ing handle screw in its back seated position Purge the pressure regulator from the outlet valve pressure regulator is now discharged Interconnection of the Manifold Gauge Set should only be consid ered for refriger ant handling or low pressure OFDN use High pressure OFDN use will cause early me chanical wear of the gauge set and manifolds sup plied with sight glass can cause violation by acci dentally pressing out the glass from the body Page 90 N5 H Leak Testing Trace Gas Leak Detection A leak detection with the use of trace gas is a very reliable method and can find even very small leaks with a leakage rate less than 1 gram per year This tech nology enables service technicians to leak test a system at lower pressure A process recognised a
72. gth Test with OFDN Course of activities sequences Section Pressure Test Strength Test with OFDN Steps recommended Carry out all intended works without hurry and THINK BEFORE ACTING AC system OFF unplugged and emptied from HC refrigerant Arrange your tools and equipment connections as indicated on page 94 The pressure adjusting handle screw of the pressure regulator is back seated The cylinder valve and the pressure regulators outlet valve to the OFDN transfer hose N is closed Ensure that the Nitrogen transfer hose with the connection at the suction line service port L consists of a core depressor to open the service port inner core valve during connection Connect the OFDN cylinder with transfer hose N to the service port of the outdoor units low side stop valve L Open the outdoor units low side and high side stop valves Open the OFDN cylinder valve Adjust the pressure regulators pressure adjusting handle screw to about 10 bar 150 PSI shown at the delivery pressure gauge Open slowly the pressure regulators outlet valve OFDN is now transferred into the complete AC system Continue the transfer of Nitrogen until there is no further flow audible pressure equali sation and 10 bar 150 PSI is indicated Watch the gauge for pressure loss O Slowly turn the pressure regulators adjusting handle to increase the sys tem pressure in stages of about 3 bar 45 PSI at a
73. he leak check activities GREE Service Manual GWCO9AA KSNNA6A Page 67 Commissioning Checks before commissioning Before the AC split system commissioning any installation work on the indoor and on the outdoor unit must be finished completely For the first time activation make sure that the following working steps listed be low are complete 1 The outdoor unit is mounted securely and tightly screwed in order to pre vent vibrations during operation The fixing ground is stable enough in or der to carry the weight of the unit 2 The wall penetrations are filled and tightened with moisture resistant insu lation and sealed professionally The earthing wire has been checked The water drain hose condensate is mounted correctly The surrounding area nearby the indoor and the outdoor unit is free such that neither the air intake nor the air outlet is obstructed amp Refrigerant circuit The outdoor unit is prefilled with the refrigerant HC R 290 The filling quantity conforms to the necessary filling of the indoor and outdoor unit as well as for the functional pipe set and is strictly limited to the labelled amount First operation of the system The first operation of the system is done under supervision of a trained and competent person This is to ensure that all installation activities are made prop erly that the system is wired correctly and that the unit operates with the in t
74. ice Manual GWCO9AA KSNNA6A Page 115 Disassembling Procedures Indoor Unit Be sure to wait 10 minutes or more after turning off all power supplies before starting disassembling works 1 Before disassembling the unit 2 Remove the displayer 1 Open the panel 2 Twist off the fixing screws used on displayer displayer box cover 2 and panel and then remove the displayer and displayer box cover 2 Display board hen Display cover GREE Service Manual GWCO9AA KSNNA6A Page 116 Step Procedure 3 Remove panel Open the panel pull out the panel shaft along the groove used for fixing the panel forcibly and then the panel be removed 4 Remove filter Loosen the clasps on filter and then remove the filter sub assy 5 Remove quide louver Loosen the clasps on filter and then remove the Bi filter sub assy S 7 Guide Louver Axile Bush GREE Service Manual GWCOYAA KBNNA6A Page 117 Step Procedure 6 Remove electric box cover 2 Electric Box Cover2 Twist off the screws between electric box cover 2 and front case and then remove the electric box cover 2 Remove front case screw Twist off the 4 screws between the front case and upper part of bottom base with screwdriver open the screw cap with hand and then twist off the other 3 screws Loosen the clasps between front case and bottom case with hand and than pull out the front case 8 Remove electric box cover Electric B
75. ideline within this chapter 9 Afollow up leak test using an appropriate HC leak detector should always be carried out prior to leaving the site man The process of charging The charging of RAC systems with HC refrigerants is similar to those using halocarbon e g HCFC R 22 refrigerants Since Hydrocarbon R 290 Propane is a pure refrigerant the charging can take place in gaseous or liquid state Keeping in mind that the specified refrigerant charge amount of the GREE conditioner is relatively low and service port of the AC unit is provided at the low pressure side only the charging of this system can be done by taking only va pour from the refrigerant cylinder and charging to the suction line of the com pressor by measuring the weight of refrigerant The charging amount should be monitored by the use of accurate and sensitive scales For safety reasons and to provide accurate charging the smallest refrigerant cylinder sizes possible should be used Arrange your equipment and tools as indicated on pages 100 and 101 Example of a sensitive charging scale Capacity 100 kg Accuracy 0 5 Resolution 2 gram GREE Service Manual GWCO09AA KBNNA6A NEVER Top Up the system with refrigerant always follow the guidelines provided with this chapter Do not back ward retrofit the GREE Air Conditioner to any other re frigerant This Will result in the operation of the system away from the design condit
76. ific condition according the provided checklist with page 102 gt oo Refrigerant circuit Examine the refrigerant circuit and check that it is free of leaks by using a HC gas detector which is reliable and safe for use with HC refrigerant R 290 Pay particular attention to the connections of the pipe set between the indoor and outdoor unit as well as to the brazed joints and mechanical connections Verify that all refrigerant transferring pipes are free of vibration and do not touch each other friction If repair or system service is necessary in specific if an intervention into the refrigerant circuit is indicated required activities have to be carried out with due care and according to the advices described with the Service repair and maintenance section beginning on page 71 of this manual Always wear your individual protective devices GREE Service Manual GWCO09AA KBNNA6A Page 72 Maintenance Checklist 290 AC Assembly group Replaced Value Remark Indoor unit Surface heat exchanger Evaporator fins Condensate and Indoor air temperature gt Fan motor and smooth operation M Outdoor unit Surface of heat exchanger 2777 Condenser fins heat exchanger Fan motor and smooth operation Housing Outdoor air temperature C niake Outlet Compressor Compressor fixing and dampers Cy Operationa
77. int between liquid valve and capillary and then remove the liquid valve GREE Service Manual GWCO09AA KBNNA6A Page 124 Procedure Caution The following procedure can only be performed after the outdoor unit s refrigerant is released and vacuumized it for more than 10mins please refer to the relevant instruction in this manual for recovering refrigerant Discharge pipe suction pipe 2 Discharge the refrigerant completely unsolder the pipes connecting the compressor and the condenser assy and then remove the suction pipe and the discharge pipe a ES 3 Unscrew 3 foot nuts of compressor to remove Compressor compressor GREE Service Manual GWCO9AA KSNNA6A Page 125 Exploded View of the GREE 290 AC Split System Indoor Unit GREE Service Manual GWCO9AA KSNNA6A Page 126 GWCODGAA K5NMAAAJI Qty CATISNT2800 7 5 mno a ElectricBoxCwert 200222003003 n 7 9 Mansoa 3013553 1 23 Evaporator Suppor 26 Rubber Plug Water Tray 10512097 GREE Service Manual GWCOYAA 5 Page 127 Exploded View of the GREE 290 AC Split System Outdoor Unit 20 16 15 14 gt GREE Service Manual GWCO9AA KSNNA6A Page 128 Part List Outdoor Unit Part Code
78. ion 056 Kollegen 018 Operation dala dessen 018 Installation site gt outdoor 057 Construction views gt indoor 019 Installation site gt indoor 057 Construction views gt outdoor 020 Installation dimension 058 Refrigerant flow 021 Installation check list c eese 059 Schematic diagram gt Electrical wiring indoor 022 Safety measures for electrical equipment 060 Schematic diagram gt Electrical wiring outdoor unit 023 Requirements for 060 Printed circuit board eer e ewes tours 024 6 en ats 060 PHO AV Miu me Dra NAE 026 Installation procedure gt indoor 061 Remote controller gt functional description 027 Installation of connection pipes and cables 062 Functional specifications for AC system 031 Installation of outdoor 065 COOMO MOS 031 Interconnec
79. ions causing a loss of system effi ciency The operation of the system with any other type of refriger ant can cause system failure and probably violation of property and health Page 100 Section Charging with HC refrigerant 290 Steps recommended Carry out all intended works without hurry and THINK BEFORE ACTING 2 Continuing from section Evacuation Arrange your tools and equipment connections as indicated on page 96 Ensure that the refrigerant transfer hose E with the connection at the suc 3 tion line service port L consists of a core depressor to open the service port inner core valve during connection The warning sign 1 placed in the work area al AC system OFF evacuated and dehydrated gt Manifold gauge valves are closed 6 L amp H otop valves at condensing unit are open 7 Open the refrigerant cylinder valve Zero the weighing scales 9 A Open the low pressure valve at the manifold gauge Open the refrigerant valve at the manifold gauge Transfer refriger 10 C ant vapour slowly 50 of total charge into the suction side of the condensing unit Measure note transferred charged refrigerant amount is a time delay of 3 minutes until the compressor starts Open the refrigerant charging valve of the manifold gauge set and slowly charge accurately the remaining refrigerant amount otesethe
80. irectives for service and 071 Low pressure trouble shooting 110 Regular annual preventive 072 PCB board U8 trouble shooting 111 Maintenance of the indoor 072 Resistance table for temperature 112 Maintenance of the outdoor 072 Main spare parts 115 81 072 Disassembling 116 Maintenance 1 021 073 Disassembling the indoor 116 Safety work area amp temporary flammable zones 074 Disassembling the outdoor 121 Arrangement of equipment and tools 075 Exploded views and part 1 5 5 126 076 Exploded view of the indoor 126 Venting gt course of activities gt part 1 077 Part list of the indoor unit 127 Venting gt part 1 gt detailed procedure 078
81. is applies specifi cally to the length of refrigerant pipes and the amount of charged refrigerant The specified refrigerant charge of the AC Split Unit is exactly 0 2 kg 200 grams of HC R 290 The specified amount of refrigerant for the air conditioners design conditions is indicated on the data plate and rated in kilograms In case of lack of refrigerant The operation of the GREE Air conditioner is only permitted with the use of re frigerant R 290 for this specific technology Extreme care should be taken not to overfill the system Topping up of the sys tem with refrigerant is not permitted This will infringe the safety certification of the air conditioner If a loss of refrigerant is indicated you are advised to carry out the following activities 1 Always follow the advices stated within this manual to provide a safe work ing area Refer to pages 74 and 75 of this manual 2 Vent the remaining amount of refrigerant as indicated on pages 76 to 80 of this manual 3 Flush the system with OFDN see pages 83 and 84 4 Carry out a leak test leak finding with OFDN and a soapy water solution see pages 89 and 90 5 Repair the leak or replace the defective component by using only OEM spare parts Carry out a pressure test with subsequent leak test see pages 94 and 95 Evacuate and dehydrate the system see pages 96 to 99 Recharge the system with the specified amount of 0 2 kg of HC R 290 refrig erant following the given gu
82. it 1 Examine the fan for functionality and smooth running 2 Carefully clean the air filter if necessary use a shower bath with hand warm water 3 Check the heat exchanger evaporator for contamination if necessary clean the evaporator water and or evaporator cleaning solution 4 Check the alignment of the evaporators fins if necessary carefully adjust the alignment by the use of a fin comb Check and clean the condensate pan and drain hose Check the control board mode and temperature indicators Check the connection cables wires are free of damage and screws are tight Check the remote controller for functionality Clean the housing of the indoor unit 0 Verify the specific condition according the provided checklist with page 73 SOONG Servicing the outdoor unit 1 Examine the fan for functionality and smooth running 2 Examine the compressor for functionality and smooth running 3 Check that the fixings and vibration dampers of the compressor are in good condition 4 Check the heat exchanger condenser for contamination if necessary clean the condenser with OFDN 5 Never use refrigerant for cleaning of the heat exchanger Check the alignment of the condensers fins if necessary carefully adjust the alignment by the use of a fin comb Check the connection cables wires are free of damage and screws are tight Check the operational conditions of the refrigeration system Clean the housing of the outdoor unit 0 Verify the spec
83. it is full of liquid refrigerant the minimum distance in all directions and with respect to the occupied working area where the service equipment is placed should be a minimum of two metres Indoor Unit Outdoor Unit 2 Metres safety Area For any reason and under specific circumstances where service or repair activi ties have to be carried out on the indoor unit breaking into the refrigerant carry ing system the designated two 2 metres safety area will apply the same way as indicated for the outdoor unit GREE Service Manual GWCO09AA KBNNA6A Strategically plan your work schedule and create a SAFTY WORK AREA of a minimum of two 2 metres The two 2 metres safety working area is in case of any accidental release of refrigerant that forms a flammable mixture with air Page 74 Arrangement of Equipment and Tools The drawing below indicates the arrangement of equipment and tools for service work where flammable refrigerant can be present The interconnection with re frigerant transfer hoses is also shown Capital letters designate the specific valve or refrigerant hose Within the following pages are these letters again in the course of activity sequences to be carried out for specific service activities like charging of refrigerant or evacuation of the system If specific valves have to be activated or refrigerant hoses to be connected the letter indicates the posi ti
84. l noise Drawn current Refrigerant discharge temperature 5 Ref suction gas temperature Suction pressure bar Refrigerant circuit Leak tightness Vibrations of pipes DENEN Friction of pipes Control system and electrics Remote control Cables and wiring fixing friction Wiring screws tightness Temperature sensors Relays or other electr components Miscellaneous Labelling oft he system Availability of documentation Any clients complain GREE Service Manual GWCO9AA D N Safety Work Area and Temporary Flammable Zones When working on systems using flammable refrigerants the technician should consider certain locations as temporary flammable zones see also page 75 These are normally regions where at least some emission of refrigerant is antici pated to occur during the normal working procedures such as recovery charg ing and so on typically where hoses may be connected or disconnected In general the work schedule for refrigerant handling during service and repair activities should be arranged in a manner that the release of refrigerant is not necessary e g pumping down the system and moving the refrigerant charge to the high site of the system In anticipation of the maximum quantity of refrig erant that may be released during such a procedure such as disconnecting a hose whilst
85. layed In this Page 30 Functional specifications Temperatures and basic functions To describe the functions there are two temperatures applied The preset indoor temperature Tpreset and the ambient temperature Tamp After energizing the system the compressor must not be restarted after a standstill of at least three minutes After a blackout the compressor likewise can only be restarted after a time gap of at least three 3 minutes provided that the system already was switched on ON status If the unit is at on status before power failure the compressor shall be restarted with three minutes delay After having started the compressor it runs for further six minutes even if the ambient temperature changes After switching on the unit the Cooling Mode N compressor Conditions and process starts with three The system starts cooling if the ambient temperature is higher or equal to the minutes time preset temperature 1 T amb gt 1 C Under this condition the compres delay sor and the outdoor unit fan are running adequately to the requested perform ance The indoor fan runs at the adjusted speed In case of lower or equal ambient temperature in comparison to the preset value 10 1 the compressor and the outdoor unit fan will be switched off The indoor fan runs at the adjusted speed In the range of ambient temperature being higher than the preset value for 1 but l
86. le of it Gradienter L O LX Ne wall 9 939 Sr 300 5 gt above N Left Right Rear piping hole Rear piping hole make sure that condensate will run out unimpeded from the indoor unit Drill the holes and then fix the mounting plate by using dowels and screws Pay attention to the way the wall is constructed at the chosen installation site Make sure that the chosen screws and dowels are able to carry the weight of the in door unit During drilling be aware of the possibility of existing supply piping such as water pipes or electrical wires Make sure not to tighten the screws directly Align the installation plate with a slight tilt only then tighten the screws Be mindful of a strong and even contact with the installation plate to the wall In doing so vibrations and sound transmis sion is avoided Furthermore pay attention to equal the weight distribution of the indoor unit to all screws GREE Service Manual GWCO09AA KSNNA6A Page 61 Installation of connection pipes and cables In order to connect the indoor and outdoor unit the connection pipes and cables preinstalled and fixed to the indoor unit need to be installed through the wall Drill a wall duct of a diameter of at least 85 mm with a slight descent through the wall of approximately 5 to the outside The hole must admit the refrigerant connection pipes cables and condensate tube All lines are covere
87. leaks is the most important activity during RAC system installation commissioning maintenance or service Having the proper test equipment is at least half of the job Unfortunately there are so many meth ods of leak detection and so many types of test equipment no one method fits every situation especially if the refrigerant in use is flammable Decisions need to be made as to the method used and the type of equipment needed for every leak to be found These conditions make leak testing one of the most challenging tasks faced by service technicians In addition national regulations are requiring service techni cians to find leaks thus not allowing technicians the choice of just adding refrig erant to keep the system in operation which is indeed a dangerous practice for systems using flammable refrigerants Finally the most important concern handing over a safe and efficient system to the client which has to be hermetically sealed and contains exactly the lowest amount of refrigerant charge required and is set up and configured to factory specifications and tolerances To provide a sealed refrigerant circuit the following direct refrigerant detection methods are recommended 1 Leak Testing with the use of an electronic gas detector 2 Strength Testing by pressurising the system with OFDN 3 Tightness Testing by pressurising the system with OFDN and subsequent Bubble Test Alternative Tightness Testing by pressurising the sys
88. let valve to the OFDN transfer hose N is closed Ensure that the Nitrogen transfer hose with the connection at the suc tion line service port L consists of a core depressor to open the ser vice port inner core valve during connection N L Connect the OFDN cylinder with transfer hose N to the service port of the outdoor units low side stop valve L t Open the outdoor units low side and high side stop valves F Open the OFDN cylinder valve 9 Adjust the pressure regulators pressure adjusting handle screw to about 10 bar 150 PSI shown at the delivery pressure gauge Open slowly the pressure regulators outlet valve OFDN is now transferred into the complete AC system Continue the transfer of Nitrogen until there is no further flow audible pressure equalisation and 10 bar 150 PSI is indicated Watch the gauge for pressure loss uf Close the pressure regulators outlet valve a Carry out the Leak Test by covering potential brazed joints mechani cal unions or piping with the weak soapy water solution and carefully search for bubbles Additionally the amount of discharging Nitrogen will indicate a leak with creating a venting noise Repeat the Bubble Test until you are confident that no leaks exist Use a small mirror for 12 places that are difficult for assessment Carefully open the service ports Schrader valve using a valve pin depressor e g a small screw driver and blow out the Nitro
89. ly einsert the terminal tightly Is malfunction eliminated No Check that he system pressure standing pressure is normal and about gt 8 bar gt 0 8 MPa Bl Die 4 or anf 7 i um 4 L x a men pou A _ o o e i 2 MESS x i Lt EHE pr 1 Eo pe HE Finn mw alata 4 VE 2 851 uw Eis AN WEM poo m en ss na ae pr c om 2 2 4 4 i 2 Veo FE FS Tiere IS d AD ai A m 4 x 4 i d s x es 12 bis EHE oe oe 12 ok ee e E x s d L a d L x i i us bs Dr us sb cr us e E s _ 4 um i 1 on 2 a ee Is malfunction eliminated ow Pressure Switch malfunction Replace low Pressure Switch GREE Service Manual GWCOYAA KSNNA6A Page 110 Trouble Shooting for PCB According to the below provided diagram identify the possible malfunction related to the controller and U8 error code indication is displayed Replace the controller with one of the same OEM model GREE Service Manual GWCO9AA KSNNA6A Page 111 Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Unit Resistance 12 66 88 63 46 0 4902 4 40 09 6 3632 8
90. m is to be decommissioned taken out of use and dismantled or sold intact the user who no longer requires the system or the use thereof shall ensure that either or the decommissioned system is leak tight so that there is very little risk of leakage during storage and the new user of the system or the dismantler disposer of the system is made aware in writing of the type and quantity of refrigerant and oil con tained within it and is fully conversant with the legal and other require ments for its safe storage handling and ultimate disposal the system refrigerant and oil charge has been adequately vented small charge amount of Hydrocarbon refrigerant R 290 or recovered and evacuated using a recovery unit as required and is disposed of properly prior to decommissioning sale or dismantling Only trained and certified personnel must carry out activities to maintain decom missioning of the AC system and disposal or recycling of components and sub stances GREE Service Manual GWCO9AA For decommis sioning of the AC system and recycling or disposal of components and substances always follow the national legal require ments and environmental protection standards Page 104 Error Codes LED Flashing and Trouble Shooting Ensure that the power input is under normal as specified with the technical details of the unit According to the error code identify the possible malfunction of
91. m the leak detector This leak test technology can be applied generally to all RAC systems and heat pumps Hydrogen is a naturally occurring gas and is charged with the Nitro gen into the empty refrigerant circuit After leak testing the gas can be vented safely into the environment Hints for the use of Hydrogen Trace Gas H2 leak detectors 1 Check your device at least once a year to ensure reliability and accuracy 2 For optimum leak detection hold the sensor head as close as possible over the refrigerant transferring pipe Move the sensor head slowly along the pipe with a maximum speed of 0 2 cm per second 3 Mechanical connections screwed unions or other connections must be scanned slowly move the sensor head right around the complete connection point 4 When the Leak Detector indicates a leak it is advisable to hold the sensor head away from the leakage site spot identified for approximately 5 to 10 seconds Then check whether the device indicates a leak at the same spot again Repeat this step up to three times This will verify if a leak really ex ists Example of Leak Detector for Hydrogen Trace Gas GREE Service Manual GWCO09AA KBNNA6A The use of Leak Detectors de signed for Trace Gas Leak Detection is a very accurate testing method Regular Gas De tectors are not useful for this technology Never switch ON the AC system if charged with OFDN and Trace gas Page 91 Leak Te
92. mal operational noise Clean system components including air filter if indicated Check display of the remote controller Execute briefing of the AC system user Client signature and date Company signature and date GREE Service Manual GWCO9AA KSNNA6A Page 70 Service Repair and maintenance A permanent stand by the reliability of the system and the expected system effi requires a regular preventive maintenance and professional service to minimise the possibility of malfunction The annual preventive maintenance and any required service should be done by a specialised company and personnel only competent person For the required tools please note the chart on pages 130 to 134 Directives for service and maintenance 1 10 11 12 13 Take precautions to avoid static charges In Carry out any service or maintenance to the system only if the working area is well venti lated Make sure that windows and doors are open Do not use open fires and remove any source of ignition away from the installation work site 2 m safe distance is recommended Do not use cell phones during maintenance and advise other attendees not to use open fires or cell phones order to do so wear e g cotton clothing and protection gloves made of cotton Should it be demanded to leave the room dur ing maintenance for example in order to get spare parts make sure that no unauthorised persons enter the room d
93. mer output terminal a SWING owing motor control AC L1 Live wire input terminal of relay box PGF PG motor feedback motor feedback feedback Fuse 7 um a pmet cap ACL Livewire input wire Live wire input Wee Display connector 2 PCB indoor unit relay box 9 pse DISP Display connector 1 connector Display connector 1 Low pressure switch Low pressure switch switch GREE Service Manual GWCO9AA KSNNA6A Page 24 Printed Circuit Board bottom view FIT T3 rn ULULI noon 9 00101 LILILIL I FT 1 11 BEEN T O GREE Service Manual GWCO09AA KBNNA6A FT IIT LL IL SH Down Do not modify electrical com ponents or wiring for replacements only use OEM spare parts Page 25 Relay Box top view UP Renz 01121314 5 6 7 8 9 LEFT RIGHT K115 2010 07 28 16 GRJS33 1A VI Relay Box bottom view GREE Service Manual GWCO9AA KSNNA6A Page 26 Functional description and controls The remote control ON OFF Press it to start or stop operation E MODE Press it to select operation mode AUTO COOL DRY FAN HEAT m Press it to increase temperature setting Press it to decrease temperature setting m FAN Press it to set fan speed 3J Press it to set swing a
94. n against noise emissions espe cially when the system is to be installed close to sensitive facilities such as hos pitals Avoid condensa tion of humidity at tubes and drains Insulate all tube connections professionally to avoid formation of water conden sation and water damage to the rooms The outdoor unit must be fixed to a flat stable location Thereby pay attention that in that location there is no snow foliage or dirt accumulating Take care of further requirements to prevent the system from damage by earthquakes hurri Pay attention 2 canes or high winds movable parts Do not touch movable parts and keep free from clothing Do not touch any part of the system without wearing suitable personnel protective equipment and Wear suitable clothing in order to avoid injury from the compressor hot surface the refriger protective ant condenser hot surface sharp fins and the refrigeration tubes hot and cold clothing surfaces sharp spots Suitable personnel protective equipment is at a minimum GREE Service Manual GWCO9AA KSNNA6A Page 9 1 Goggles 2 Gloves 3 Shoes 4 Overalls Do not install the system in humid places Do not clean the system using water Do not energise the system without the suitable air filter assembly to prevent dust accumulation within itself Clean up the installation or service area once work is completed and ensure that no waste metal parts or wires remain in the e
95. need to be super vised by a responsible person if the system is operated by these people The system is not a toy Give advice to the end user of no uncontrolled playing of children in order to avoid misuse of the system GREE Service Manual GWCO9AA Check the provided wiring diagram and verify with the installed AC unit Page 60 Procedure of the installation of the system The following basic procedures must be observed for installation of the system 1 Read the specifications of the system and make sure that you understood them 2 Make sure that the installation site meets the requirements 3 Check the tools and equipment especially concerning the suitability with R 290 4 Accomplish the proper connection of the system 5 Check the integrity of the system and check all the functions 6 Hand over the end user manual to the client and instruct the operator about the basic functions of the system 7 Fill in and sign the commissioning report Start up data sheet provided page 70 of this manual Installation of the indoor unit After choosing a reliable installation site and a controlled check of the tools for mounting the system start mounting the indoor unit The Mounting Plate Install the mounting plate where the indoor unit will be placed Place the mounting plate horizontally ensuring there is still a slight tilt in order to Wall Wall Mark on the midd
96. nents with safety relevant functions jeopardises the safe op eration of the installation In case it is necessary to replace components only use approved parts from GREE Electric the Original Equipment Manufacturer OEM or Gree released or authorised components The system contains the refrigerant R 290 propane This condition requires special safety precautions to be observed While working on the system the presence of any kind of igni tion sources e g sparks open flames hot surfaces static electricity are strictly prohibited At the installation site no matter what kind of activities are executed smoking is strictly prohibited Likewise ensure the installation site is well ventilated For further details on the handling of the refrigerant R 290 see also pages 11 and 41 Do not charge the system with any refrigerant which is not R 290 Do not mix any refrigerants Before filling the system ensure that there 1 no air or other non condensable gases such as nitrogen left in the system otherwise there is severe danger of damage to the system caused by excessive high pressure After charging the system with refrigerant carefully examine and confirm the tightness by the use of an appropriate electronic leak detector GREE Service Manual GWCO09AA KSNNA6A ONLY original GREE OEM spare parts are permitted for Service and Re pair Page 8 Electrical operations Electric operations installation repair modificati
97. ngle E g TIMER ON Press it to set auto on timer TIMER OFF Press it to set auto off timer Ba G CLOCK Press it to set clock TEMP xd TURBO SLEEP LIGHT Press it to turn on off the light GREE Service Manual GWCO9AA K5NNA6A Page 27 1711819 MODE icon If MODE button 15 pressed current operation mode icon COOL aA DRY SE FAN or is only for heat pump models will show 46 SLEEP icon Gis displayed by pressing the SLEEP button Press this button again to clear the display TEMP icon Pressing TEMP button temperature fl iambient temperature f noutdoar ambient temperature and blank is again to clear the display 18 Up amp down swing icon 15 displayed when pressing the amp down swing button Press this button again to clear the display LIGHT icon ye is displayed by pressing the LIGHT button Press LIGHT button again to clear the display 20 LOCK icon is displayed by pressing and buttons simultaneously Press them again to clear the display 21 SET TIME display After pressing TIMER button or OFF will blink This area will show the set time GREE Service Manual GWCO9AA KSNNA6A Page 28 22 TURBO icon amp is displayed when pressing the TURBO button Press this button again to clear the display 23 DIGITAL display This area will show the set temperature In SAVE
98. nt chapters Regardless of further requirements of the country in which the equipment will be installed assembly first start up technical service maintenance and repair as well as dismantling and disposal have to be carried out by authorised personnel only During every operation strictly follow the instructions within this manual Pay attention to the specific rules of air conditioning electrics and refrig erant handling of the country within which the equipment is installed Key sections and or sentences are highlighted with specific icons and symbols to the right side of the page Please pay particular attention to this information The symbols used in this manual are as follows This is a specific Information window highlighting important content of the spe remark and cific section or additional information to consider points out the importance of a specific section This sign will indicate that you are handling a flammable sub stance and the surrounding environment can possibly con tain it This is a general warning sign This label is used to indicate that the flammable refrigerant is present within the application and service equipment Images that indicate something that you should be strictly avoided GREE Service Manual GWCO9AA KSNNA6A Page 7 Specific bans Specific commandments Instructions for first aid Fire protection Carefully read the instructions Working on compo
99. nvironmentally protective Refrigerant R 290 Flammable Refrigerant RefrigerantChargeinkg 020 LubricantType amp Charge __ If you leave the system ensure that all valves are capped and tight O ring and gaskets uncapped valves are a very common source of leakage GREE Service Manual GWCO09AA KSNNA6A Page 103 Dismantling Recycling and Disposal At the end of the life cycle of the GREE 290 Air conditioner discontinuation of operation economically irreparable damage the following general activities and precautions should be implemented Avoid any hazards to operatives carrying out dismantling processes Plug in appliance is electrically disconnected or arrangements made for appropriately licensed person to isolate hard wired appliances Refrigerant is adequately vented recovered stored and disposed of in accordance with the national legislative and industry requirements and standards Units and components are removed and disposed of safely and in accor dance with regulations industry codes of practice and sustainable envi ronmental practices The worksite is cleaned and left in presentable condition client and organ isational requirements industry standards and sustainable environmental practices Decommissioning and disposal documentation is completed and proc essed in accordance with national State regulatory requirements When a refrigeration or air conditioning syste
100. o tection device PPE Page 12 Installation commissioning and maintenance of condensers The basic functioning of a condenser Installing a condenser properly including control and safety equipment Adjusting the safety and control switches Checking the hot gas and liquid lines in correct positions Start up and shut down a condenser and check the good working conditions including by making measurements during operation Checking the surface of the condenser Methods for condenser surface cleaning and fins adjustments Installation commissioning and maintenance of evaporators The basic functioning of an evaporator including defrosting system Installation of an evaporator including control and safety equipment Adjusting the safety and control switches Checking the liquid and suction pipelines in the correct position and checking the hot gas defrost pipeline Start up and shut down an evaporator and check the good working of the evaporator including by making measurements during operation Functional checking of the reverse cycling control device Checking the surface of the evaporator Methods for evaporator surface clean ing and fins adjustments Piping Professional brazing is another key component for safe and state of the art HC system installation and servicing Brazing leak free joints on metallic tubes and pipes that can be used in refrigeration air conditioning or heat pump systems Make check pipe and compon
101. of disposable refrigerant cans 1 4 SAE refrigerant hose connection GREE Service Manual GWCO9AA KSNNA6A Page 132 Digital precision quick response thermometer set for thermo couples and simultaneous connection of two 2 plug in probes Display in two 4 digit LCD Probe connection in two jacks for flat pin plugs Accuracy 1 at nominal temperature 25 C Two 2 K type probes for measuring range 150 C to 1150 C Push buttons as membrane keys Power supply 9V battery Brazing unit complete consisting of one 2 liter Oxygen and one 0 425 kg Propane LPG gas cylinder Complete set including valves safety valves pressure gauges constant pressure regulator 3m hoses torch and tip sizes 3 according EN962 complete with carying frame Brazing rods for copper to copper or copper to brass brazing B Cus0PAg L Ag15P 0198513 Brazing flux Cu Cu Cu Brass and Red brass according to DIN EN 1045 Lokring pressing equipment basic set consisting of Steel case assembly tool and jaws Lokprep anaerobic filler brass connectors brass reducers euro flare fittings Lokring stabilisation inserts HC R 290 refrigerant in disposable cans with charging amount of about 380 er purity gt 99 5 Hydrocabon R 290 Propane refrigerant in cylinder with at least 3 charge purity 99 5 GREE Service Manual GWCO9AA KSNNA6A Page 133 Protective goggles according to EN 27 166 Protective gloves according to
102. ogen vented from a inder will reduce the oxygen con tent in the surrounding area and can cause suffocation Do not use oxygen or compressed air to pressurize RAC systems because when mixed with oil e g compres sor lubricant for most refrigerants these gases can cause explosions Only use OFDN gas and pressure cylinder in combi nation with a reli able and appro priate pressure regulator If possible use an intermediate pressure gauge equipped with control valve within the Nitro gen transfer hose for system monitoring see next page Page 81 OFDN Cylinder and Pressure Regulator Arrangement Pressure Regulator Cylinder Vale Pressure Adjusting Knob OFDN Transfer Hose OFDN Cylinder here 5 Litre content Base Frame for Safe Use Scale for strength test values PERKEG fae Example Control valve A SAE con nection for OFDN transfer hose Intermediate gauge for 15 system monitoring Connection to pressure regulator gt _ 4 Valve OFDN Transfer Pressure Regulator Hose Connection Pressure Adjusting Knob Example GREE Service Manual GWCO9AA KSNNA6A Page 82 The use of Oxygen Free and Dry Nitrogen OFDN Flushing the system and providing a Holding Charge of OFDN to the system After HC refrigerant removal venting and recovery by vacuum pump from the system
103. on maintenance adjustment Proceed have to be fulfilled by trained and authorised personnel only according the When dealing with electrical issues the specific rules of the country within which _ manuals the equipment is installed must be followed in addition to the instructions within instructions this manual When working on the equipment or parts of it the system has to be de energised by master switch circuit breaker or separate cut out and made safe against restart of the system Do not reconnect the system to the electric circuit until all work is done and all connections are tested If handled unsafely or unprofessionally severe electric shocks can occur Con sider the wiring diagram and follow the instructions of this manual very carefully whilst working on electrical parts Wrong connections or incorrect grounding may lead to severe injuries and mortal danger Ground the system according to the particular requirements of the country within which the equipment is installed Connect all the wires properly and durably Loose cables may lead to overheat ing or fire Regard Installation site RT UE Ensure that the ceiling or the wall is solid enough to carry the weight of the sys protection avoid tem which will be mounted on it Pay attention to the installation of the outdoor disruptive noise unit operating noise and air flow should not bother neighbours emissions Make sure that appropriate measures are take
104. on in the diagram for reviewing and better understanding Low PressureGauge E Comnecion nossas _ Mariel Vacuum Pump F Connecion Hose B Vacuum Pump E Vacuum Gauge 1 Connection Hose D gt Vacuum Gauge Outdoor Unit Liquid Side High K Vent Hose 5 m length gt 12 mm inner diameter f ITE 54V DIGITAL VACUUM GAUGE GREE Service Manual GWCO9AA KSNNA6A Page 75 Refrigerant Venting In order to open the refrigerant cycle for any repair replacement of parts and subsequent brazing or tube joining with pressing connections the total R 290 refrigerant charge has to be removed from the system Venting can be carried out as an alternative to recovering the refrigerant If vent ing is considered it should be done in accordance with the relevant national laws Normally venting is only carried out with systems that contain a small quantity of refrigerant larger quantities should be recovered If venting is to be carried out a set of special procedures is required to ensure that it is done safely by following the general safety procedures and through appropriate use of a suitable hose Important Notes 1 Venting inside a building is not permissible under any circumstances 2 Venting must not be to a public area or where people are unaware of the procedure taking place 3 hose must be of sufficient length of about a minimum of 5 m 4 The hose
105. or e g small screw driver and blow out trace gas charge If necessary hold a piece of old cloth or paper into the flow stream to keep eventually escaping oil from the system Do not inhale the es gas Leave a slight overpressure in the system Ensure venti lation of the work space during gas venting 15 If a leak was found in step 12 repair the leak or replace the leaky component and continue with step 5 and 7 to 14 Close the outdoor units low side and high side stop valves front 16 H L seated position Close the trace gas cylinder valve Return the pressure regulators 17 adjusting handle screw in its back seated position Purge the pres sure regulator from the outlet valve pressure regulator is now dis charged GREE Service Manual GWCOYAA KSNNA6A Page 93 4 TL 14 Pressure Test Strength test with OFDN After any modification or repair to the AC system intervention into the refriger ant circuit at least the affected part refrigerant circuit piping or piping connections shall be subjected to a strength test pressure test The strength test pressure shall not exceed the strength test pressure applied to components by the manufacturer this may require the testing of the low pressure side of the system separately from the high pressure side In fact this is not possible for the installed GREE AC units and in specific for heat pumps not applicable here is not necessar
106. or the use with HC R 600a and R 290 Recovery capacity 32 kg h on board storage capacity 250g equipped with thermal overload and protection and HP switch 230 V S0Hz 1 GREE Service Manual GWCO9AA KSNNA6A Page 131 Refillable refrigerant recovery cylinder equipped with double valve for liquid and vapour refrigerant transfer Minimum capacity water 11 9 kg 26 2 165 Meeting DOT 4BA 400 or ADR P200 standard Set of nitrogen cylinder and pressure regulator DIN EN ISO 2503 Cylinder 5 Litre and 300bar Regulator oressure 315 200 bar Working pressure 40 bar Inlet W24 321 14 RH Outlet 61 4 RH Adapter for 1 4 NPT refrigerant hose Nitrogen nose with ball valve and 150cm long Torque wrench tool set in sturdy olastic case consisting of torque wrench insertable open ended wrench in the sizes of 17 22 24 27 and 36 14 Set of three 3 adjustable wrenches Size 200mm 8 size 250mm 10 250mm size 300mm 12 Chrome Vanadium Steel Chrome Finish 1 Set of seven 7 allen keys sices 2 5 3 4 5 6 8 and 10 Chrome Vanadium Steel 1 Set of two 2 tube cutter tube OD 3 to 16mm and 7 to 41mm Large tube cutter with Reamer and Spare Wheel 1 Core removal tool core removal without refrigerant losses brass with magnetic tip one 1 4 male flare SAE connection and one female 1 4 connection equipped witn ball valve l Extraction valve for extracting of 1 refrigerants HCs out
107. ose appropriate measures to prevent static charges Please remember that the maximum quantity of stored refrigerant some times might be regulated by national regulations The transport of cylinders is controlled by laws in most countries These laws must always be regarded first before the mentioned guidelines here In many cases information about regulations for the transport of cylinders could be given by the dealer of the refrigerant DUET Sud GREE Service Manual GWCO09AA KBNNA6A Charging Always use the smallest cylin der possible and relay on appro priate accurate and sensitive scales Read More Guidlines for the safe use of hydrocarbon refrigerants GIZ PROKLIMA http www giz de proklima Page 46 Basically the following must be regarded concerning the transport of 290 cyl inders 1 During the transportation of R 290 always carry along printed information about the refrigerant In case of emergency these information must be easily accessible There are often different demands to the transporters carrying a great quantity of gas Inform yourself before the scheduled transport 2 Make yourself familiar with the risks of the refrigerant and the emergency measures in case of accident or emergency Always carry fire extinguisher during transportation with you It should be a dry powder fire extinguisher with a capacity of at least of 2 kg Make sure that the driver is expe
108. ower than the preselection of 16 T preset 1 C lt T amb lt 1 the system will not change its status As to that please compare the following schedule Tamb Start cooling Tpreset l1 C Original operating status Tpreset 1 C Stop cooling In this mode the temperature ranges between 16 to 306 On the display of the indoor unit the symbols OPERATION COOLING and the temperature preset value are indicated GREE Service Manual GWCO09AA KSNNA6A Page 31 DRY Mode In general the air humi A ity will be reduced in cool mode In dry mode extra dry ing is possible e reducing the fan speed Dry Mode conditions and process The system starts cooling and dehu ng if the ambient temperatur equa amb preset Under this condition the compressor and outdoor unit fan ded ade quately to the requested performance Meanwhile the fan of eal nit is decelerated to LOW position equal ambient temperature in comparison to the pre 2 but lower qual to the siding el 20 lt 2 C the system starts the dehumidifying funct So the f f th door unit is decelerated to LOW position The compr well as the o door unit fan will r i r Six he rther minutes then they are switc ed off for fou minutes This cycle repeats in the DRY MODE In the ange dme nt temperature being low patch erence 20 Tass et 2 C the switch off the mpress nd the fan of the outdoo
109. ox Cover Loosen the clasps used for connecting the electric box cover and electric box with hand and then remove the electric box cover 9 Remove water tray sub assy Twist off the 2 screws used for connecting the TE Water Tray Assy water tray sub assy and bottom case with screwdriver pull out the plug of stepping motor and then the water tray sub assy can be removed stepping GREE Service Manual GWCO9AA KSNNA6A Page 118 10 Remove electric box sub assy 11 Remove evaporator sub assy 12 Remove cross flow blade and motor Procedure Twist off the screws used for connecting the electric box sub assy and bottom case with screwdriver loosen the clasps twist off the screws used for connecting the earthing wire and evaporator pull out the room temperature sensor and then remove the electric box Electric Box Assy Turn over the bottom case twist off the screws Used for fixing the press board of connection pipe and bottom case with screwdriver loosen the clasps between press board of connection pipe and bottom case with hand and then remove the press board of connection pipa Twist off the connection screws used for connecting the evaporator sub assy and motor press board and bottom case loosen the clasps used for fixing the evaporator sub assy and bottom case and then remove the evaporator sub assy Note please refer to the relevant insutruction in this manual for recovering refrigerant Twis
110. pressurised refrigerant R 290 The release of refrigerant is practi cally not possible during the correct connection of the quick coupler Advantages with the use of quick coupler e Fast and easy connection of liquid and suction line in fixed installation from the evaporator to the valve assembly of the outdoor unit For leak free e Durable gas tight interconnection connection of Repeated interconnection is possible placing of the AC unit at another the suitable installation place T valves The valve and quick connector assembly consists of in total four 4 mechanical Suction Line L connections 1 Stop valve at outdoor unit stem to be activated by Allen key with gt SAE have to be connection tightened 2 Service port 1 4 SAE connection with internal Schrader valve 3 Male Quick Coupler part valve side 4 Female Quick Coupler part Suction line side with gt pipe joint p missioning of Liquid Line H mm Stop valve at outdoor unit stem to be activated by Allen key with 2 SAE mechanical connection connections 6 Male Quick Coupler part valve side subject to a leak 7 Female Quick Coupler part Suction line side with 14 pipe joint check with ap propriate leak detector D Tighten here Carefully mount the valve caps and the service port cap back to the stop valves and include these spots into Tighten here t
111. quipment housing If anything irregular or conspicuous occurs such as burnt part smell loud noise etc disconnect the system immediately and isolate from the electrical supply Minimum room size HC R 290 is a flammable refrigerant and can form explosive mixtures in low concentrations To minimise the risk of fire or explosion the system must be in stalled in a room with a minimum floor area GREE Service Manual GWCO9AA KSNNA6A Page 10 Minimum requirements for service personal qualification Unless there are further requirements standards and legislation of the country within which the equipment is installed may apply Any techni cians that works on GREE hydrocarbon air conditioners must be compe tent in the safe handling of flammable refrigerants in addition to being in possession of knowledge and skills to maintain best refrigeration installa tion and servicing practices There are already training activities in place for engineers technicians and sales Staff to provide professional knowledge and skills for the handling of HC refrig erants and refrigeration systems operating with HCs Get trained and have your HC Refrigeration Professional certification Basics in RAC Knowledge of the basic SI standard units for temperature pressure mass den sity energy Understanding of the basic theory of refrigeration systems including the func tions of the main components in the system compressor evapor
112. r the purpose of leak testing a safe pressure is usually about 10 bar 150 psig Example of Bubble Test application and a commercially provided Leak Check fluid with Pin Brush m GREE Service Manual GWCO09AA KBNNA6A Page 87 Electronic Gas Detectors Using an electronic gas detector is generally the fastest way to find an unknown leak or at least if refrigerant is present in the surrounding area They can be used to quickly find a leak or to find the area in which the leak exists in a system when you don t even know where to start The electronic gas detector is good for most leaks if the device is used and maintained correctly Note For the use with Hydrocarbon refrigerants here HC R 290 it is im portant to make sure that the detector is safe and sensitive for this refrigerant Regularly used electronic gas detectors for CFC HCFC or HFC refrigerants are in most cases not designed for the use with HC R 290 so check with your equipment provider and review the product manual if the gas detector is safe for your specific use An electronic gas detector gets you very close to the leak spot and can indicate leaks of less than 5 grams per year After you find the area in which the leak is detected you can usually decrease the sensitivity of your detector to indicate the area of the leak Cover the leak area with some weak soap water solution to verify the exact point of the leak Hints for the use of electronic leak d
113. r tools and equipment connections as indicated on page 83 The pressure adjusting handle screw of the pressure regulator is back seated The cylinder valve and the pressure regulators outlet valve to the OFDN transfer hose N is closed Assure that the nitrogen transfer hose with the connection at the suc tion line service port L consists of a core depressor to open the ser vice port inner core valve during connection Connect the OFDN cylinder with transfer hose N to the service port of N L i the outdoor units low side stop valve L Open the outdoor units low side and high side stop valves Open the OFDN cylinder valve Adjust the pressure regulators pressure adjusting handle screw to Interconnection about 10 bar shown at the delivery pressure gauge of the Manifold Gauge Set should only be consid ered for refriger transfer of until there is no further flow audible pressure ant handling or low pressure lisati d10b dicated equalisation an ar is indicate OFDN use Open slowly the pressure regulators outlet valve OFDN now is transferred into the complete AC system Continue the r Carefully open the service ports Schrader valve using a valve pin chanical wear of the gauge set and depressor e g small screw driver and blow out the Nitrogen charge 13 If necessary hold a piece of old cloth or paper into the flow stream to keep eventually escaping oil from the system
114. re at ambient temperatures e Vapour is heavier than air and may travel to remote sources of ignition e g along drainage systems into basements etc e Liquid releases generate large volumes of flammable vapour approx 250 1 e Cold burns frostbite will result from skin eye contact with liquid e Liquid release or vapour pressure jets present a risk of serious damage to the eyes e Abuse involving inhalation of high concentrations of vapour even for short periods can produce unconsciousness or may prove fatal Inhalation may cause irritation to the nose and throat headache nausea vomiting dizzi ness and drowsiness In poorly ventilated areas unconsciousness or as phyxiation may result GREE Service Manual GWCO09AA KBNNA6A To ignite HC R 290 three 3 components must exist at the same time at work area to cause the refrigerant burning 1 kg of liquid HC R 290 refrigerant creates about 250 litres of gas Beside the flam mability most other safety properties are similar to other refrigerants Rely always on best service practices in refrigeration Page 39 First Aid Measures Inhalation Remove the affected person to fresh air If breathing has stopped administer artificial respiration Give external cardiac massage if necessary If the person is breathing but unconscious place them in the recovery position Obtain medical assistance immediately Skin In case of cold b
115. reaches the preselected time set Timer Change If the system is activated in a certain timer status to be seen above it can be switched ON OFF by pressing the corresponding key Timer will be reset Putting the timer in ON as well as OFF during system operation it continues operation into the preset time Timer OFF is over Then it will stop automati cally If are two timer sets for and OFF Timer during system standstill it re mains disconnected until the ON Timer is reached It is reinitiated after that Buzzer Whenever the indoor unit gets a signal pushing a button on the unit itself or on the remote control unit or by switching on it makes a sound Sleep function This function gives a selection of diverse graphics of preselected temperatures for sleep time Turbo Function This function may be set in COOLING mode Automatic Control of Fan speed The system will automatically choose the speed of the indoor unit fan LOW MEDIUM HIGH dependent on the ambient temperature GREE Service Manual GWCO9AA KSNNA6A Page 35 Air flow direction As described above the indoor unit is able to blow out air into various direc tions After energizing the system the electric motor moves the air flap counter clockwise in zero position to close the air outlet Switching on the system and no flap move or swing is adjusted the motor will move the air outlet flap clockwise to L If the system is energized and a swing w
116. reaerantoyindervave Record the system data use provided form from 102 Close stop valve at condensing unit HP Stem in front seated po 17 sition to pump down and transfer the refrigerant into the high side section of the AC unit If low pressure gauge indicates 0 bar all refrigerant remaining in the hoses assembly and gauges manifold set is sucked back into the AC unit Closed 56 Open the high pressure stop valve at the outdoor unit Stem in 4 back seated position Yn 21 2 2 Remove Manifold and install end caps Final leak check with soapy water or electronic HC leak detector 23 L amp H H while operational AC unit L in off mode al General functional test of the system and system labelling 25 Fill Start Up data sheet for Service and Repair works GREE Service Manual GWCO9AA KSNNA6A Page 101 Start Up Data Sheet for GREE Split Air Conditioner Service and Repair Installation Company Address Telephone amp Fax Technician Name Registration No Client Company Contact Person Installation Appliance DATA Model and No Date of Installation Repair Comments Repair Operating Data Cooling Mode Refrigerant Type R 290 Refrigerant Name Refrigerant charge in kg Suction Pressure 1 Suction Temp P1 ee Air Temp entering condenser Air Temp leaving condenser 4 Air Temp entering
117. rienced in fire extinguisher operation 4 Cylinders must be transported in an upright position and be tightly se cured 5 Make sure of a proper ventilation inside the van even though it might re quest a change in the vans body construction 6 Place the security advise flammable gas upon the rear side of the van 7 Smoking or open fire is strictly forbidden inside the van 8 Do not leave cylinders in a locked van without surveillance longer than necessary GREE Service Manual GWCO9AA KSNNA6A Page 47 Pressure Temperature Chart HC Refrigerant R 290 Temperature Absolute pressure C F kPa bar PSI Ta 16 12 39 38 2 116 00 1 16 16 83 38 36 4 121 05 1 21 17 56 37 34 6 126 27 1 26 18 31 36 32 8 131 66 1 32 19 10 35 31 137 23 1 37 19 90 34 29 2 142 97 1 43 20 74 33 27 4 148 90 1 49 21 60 32 25 6 155 02 155 22 48 31 23 8 161 33 1 61 23 40 Ww 4 2 NINN NM 1 2 13 N gt S U9 EY 00 32 T 23 406 04 4 06 58 89 N JJ ITI m n D lt D lt Q D f gt O gt gt gt 2 Pd gt gt gt kPa g 11 12 16 00 21 05 26 27 31 66 37 23 42 97 48 90 55 02 61 33 67 83 74 54 81 44 88 56 95 89 103 43 111 19 119 18 127 39 135 84 144 52 153 44 162 6
118. rmally stamped on the cylinder in order to make sure that it is empty Pressure control is no secure method to find out if and how much refrigerant there is inside the cylinder 9 For accurate charging use a set of reliable scales with appropriate resolu tion depending on the size of system charged with refrigerant and use the smallest size of cylinder available 10 For recovery of R 290 only use cylinders which are allowed to be filled with R 290 11 Make sure that safety inspections are still valid i e within date specifi cally with regards to safety test certification 12 For refillable recovery cylinders keep in mind that with recovered amounts of HC refrigerant oil will always be present specific amounts may remain in the cylinder after emptying MIS gt The storage of R 290 cylinders is controlled by regulations These regulations take priority over the present guidelines Typically such rules imply the follow ing 1 Cylinders should be stored in a separate area preferably outside other wise in a dry well ventilated place far away from any ignition source 2 Admission to storage area must only be given to authorised personnel Storage areas must be labelled with no smoking and no naked flames signs otorage areas should be at ground level and never in the basement Access should be easy exclude any obstacles Cylinders should be stored and operated only in an upright position Cho
119. rrangement will enable you to carry out a Standing Pressure Test and after a period of time to identify whether or not the pressure drops during this time within the AC system or specific sepa rated parts of the system Fortunately the dry Nitrogen charge in the AC sys tem experiences a very little pressure change when the AC system is exposed to small temperature changes with the environment This procedure may enable you to verify that the system or separated parts of it is free of leaks Example of an intermediate Hose N pressure gauge for Standing Pressure Test The stop valve enables you to separate the gauge from the OFDN gas cylinder and to check the refrigerant circuit by pressurising with OFDN for I pressure fall in a i certain period of time Never switch ON the AC system if charged with OFDN Page 89 GREE Service Manual GWCO09AA KSNNA6A Leak Testing with OFDN gas and Weak Soapy Water Solution Course of activities sequences Section Leak Test with OFDN and Bubble Test Steps recommended No Where Activities S 4 Carry out all intended works without hurry and THINK BEFORE ACTING 21 AC system OFF unplugged and emptied from HC refrigerant Arrange your tools and equipment connections as indicated on page 89 The pressure adjusting handle screw of the pressure regulator is back seated The cylinder valve and the pressure regulators out
120. s a Fine Leak Test is based on the use of the Forming gas as the test gas in conjunction with a special leak detector Forming gas is a mixture of Nitrogen N2 and Hydrogen gt A suitable electronic gas detector must be used a standard gas detector is not sensitive to Hydrogen The fa vourable physical properties of hydrogen are made use of here for detecting leaks Forming gas in proportion of 95 5 for RAC purpose contains 95 Nitro gen and 5 Hydrogen Hydrogen constituents can escape from even the small est leaks and will be detected by the gas detector A test pressure of about 5 bar is adequate for reliable fine leak test The climate neutral Hydrogen gas is the smallest natural occurring molecule The favourable physical property of gt gas means that it diffuses through insu lating materials or other covering material if a leak occurs This makes it possi ble to test refrigerant transfer pipes or components including mechanical con nections covered with insulating material without removing or damaging it The gas can penetrate even screed foam etc Hydrogen Leak Detectors do not have a cross sensitivity and for that reason a false alarm is not possible from external gases Since Hydrogen gas has a smaller density than air 14 times lighter it always rises and makes tracing above pipes possible The Hydrogen share in the Forming gas serves as Trace gas and only this gas is selected by the electronic sensor fro
121. s matching to the actual choice the dedicated icon COOLING FAN Moreover the prese lected temperature is displayed Please note the delay of 30 seconds before the system changes mode The safety functions correspond to those in the particularly represented mode GREE Service Manual GWCO9AA Page 34 Other adjustments and functions of the remote controller Timer function The system is equipped with two Timer settings as there is the common Timer and a Time pre selection These Timers can be optionally adjusted by the re mote control unit General Timer If the system is switched off the Timer can be switched ON By reaching the time preset system restarts in the same manner as before the switch 1 off The interval of the Timer adjustment is half an hour and can be set from 0 5 up to 24 hours Timer function may be adjusted while system operation is in OFF position As soon as the preselected time is over the system stops automatically The inter val is even 0 5 hours time setting from 0 5 up to 24 hours Clock Timer Tripping the Timer ON when the system operates it will continue operation If the system is de energised when the Timer is switched ON it will restart after the preselected time under the previously chosen conditions Putting the timer in OFF position in system standstill it stays de energised In case the timer is switched in OFF position during system operation will go on until it
122. s use a dual stage vacuum pump equipped with gas ballast valve and appropriate to the volume of the refrigerant circuit about 170 litres minute or 6 CFM and the capability for an ultimate vacuum of 15 micron 0 020 mbar 2 The vacuum pump should have 7 and 4 male flare connections 3 At best the vacuum pump should have a solenoid valve at the suction port to avoid any draw back of air into the system due to a power cut during op eration 4 The vacuum pump should have an oil mist filter at the outlet with connection for the Hydrocarbon vent hose 5 The vacuum pump should be regularly checked for sufficient and clean vac uum pump lubricant 6 For system evacuation the vacuum pump should be connected and oper ated at the low and high side of the system The operation of a vacuum pump at the GREE HC Air conditioner the connection to the low side only is possible service port provision 7 In order to achieve the best efficiency of the pump according to the pumps capabilities the vacuum hose should be of the largest diameter diameter and 2 x female flare SAE connection and kept to a minimum length about 1 metre 8 The vacuum hose should not have core depressors pressure drop to high within the hose during evacuation 9 The manifold gauge set should have a valve port for the vacuum pump with and 1 4 SAE male flare connection 10 A suitable calibrated vacuum gauge best possible an electronic device
123. skills updated for HC refriger ants and be certificated for these jobs Read More SAFETY CODE OF PRACTICE FOR REFRIGERATING SYSTEMS UTILISING A2 A3 REFRIGERANTS ISBN 1872719155 Page 11 Checks before putting in operation after a long period of non use after maintenance or repair intervention or during opera tion Carry out a pressure and leak test to check the strength and the tightness of the system Usage of a vacuum pump Evacuation of the system to remove air and moisture according to standard practice Checks for leakage Knowledge of potential leakage points of refrigeration air conditioning and heat pump equipment Making a visual and manual inspection of the whole system Carry out a check for leakage of the system using an indirect method and or one of the direct methods Direct leak detection methods Fixed leakage detection systems Portable electronic gas detectors Ultraviolet UV indication fluids Weak soapy water solution bubble test also in combination with OFDN New installation tightness test for leakage detection procedure e g H2 N2 Operational system tightness test for leakage detection procedure Indirect refrigerant detection methods 1 Visual 2 Manual checks Use of portable measuring devices such as pressure gauges thermometers and multi meters for measuring Volt Amp Ohm in the context of indirect methods for leakage checking and interpretation
124. sting with Trace Gas This method consists of pressurising the empty refrigerant circuit with the Form ing Gas mixture Trace gas A pressure usually about 5 bar 72 5 PSI is applicable The subsequently carried out Leak Test using a Hydrogen gt Trace Gas Leak Detector shall cover all potential areas of possible leakages Provide a filled Forming Gas Cylinder containing the mixture gas equipped with reliable pressure regulator and transfer hose T having a SAE female adapter and with Schrader valve core depressor The warning sign is still placed in the work area because we are now handling a pressurised about 250 bar gas cylinder with a gas mixture and after works the gas is intentionally blown off from the system to the ambient area Cylinder filled with Nitrogen and Hydrogen H mixture 95 596 Never switch ON the AC system if charged with Trace Gas mixture GREE Service Manual GWCO09AA KBNNA6A Page 92 N H2 Trace Gas Leak Detection Course of activities sequences Section Trace Gas Leak Detection Steps recommended Carry out all intended works without hurry and THINK BEFORE ACTING AC system OFF unplugged and emptied from HC refrigerant Arrange your tools and equipment connections as indicated on page 3 92 The pressure adjusting handle screw of the pressure regulator is back seated The cylinder valve and the pressure regulators ou
125. t off the 4 screws used for connecting the motor press board and bottom case with screwdriver and then remove the motor press board GREE Service Manual GWCO9AA KSNNA6A Page 119 Step Procedure Take out the cross flow blade and motor with hands Rear Case assy Twist off the screws used for fixing the cross flow blade and motor shaft with screwdriver and then remove the motor Gross Flow Blade Fan Motor GREE Service Manual GWCO9AA KSNNA6A Page 120 Disassembling Procedures Outdoor Unit Be sure to wait 10 minutes or more after turning off all power supplies before starting disassembling works Step Procedure 1 Remove top cover and handle Before disassembling the unit Twist off the screw used for fixing the handle with screwdriver and then remove the big handle Top panel Twist off the 3 screws used for connecting the Handle top cover plate panel and right side plate and then remove the top cover plate GREE Service Manual GWCO9AA K5BNNA6A Page 121 2 Remove panel Twist off the 2 screws used for connecting the grille and panel loosen the clasps and then remove the grille 2 Twist off the 5 screws used for connecting the panel chassis and motor support with screwdriver and then remove the panel Front panel j Remowve right side plate Twist aff the 6 screws used for connecting the right side plate and chassis valve support and electric box and then the right side pla
126. tance Regardless of any other national laws and requirements the resistance of the live and neutral wire must be above 7 MOhm 9 Install the valve cover back to the housing of the outdoor unit Handing over the new system to your client The client must be comprehensively instructed on the operation and the func tions of the system as well as the handling of the remote control Show to the client the relevant pages of the users operators manual where they will find suitable and specific information Handover the operation manual to the client as well as this instruction manual Request that the client keeps the technical data sheets and all instruction manu als nearby the unit For the documentation of the system commissioning and clients instruction use the Start Up Data Sheet report placed on the following page GREE Service Manual GWCO9AA Make sure leak checking is done on the suction side of the unit without operation of the unit In contrast check for leaks to the liquid side whilst the unit operates Because Suction pres sure is higher at the low pressure site of the system in Off position Pressure at the liquid stop valve is higher under operational con ditions of the system Leaks are better detected under higher pressure Fillthe Start Up Data Sheet report sign it and hand it over to the client Page 69 Start Up Data Sheet
127. te can be removed Right Side Plate GREE Service Manual GWCOYAA KBNNA6A Page 122 4 Remove axial flaw blade and motor 1 Twist off the nuts blade with wrench and then remove the axial flow blade 2 Twist off the 4 tapping screws used for fixing the motor by screwdriver pull out the pin of leading out wire for motor and then remove the motor Twist off the 2 tapping screws used for fixing the motor support pull it upward and then remove the motor support E Remove electric box Twist aff the screws used for fixing the electric box sub assy with screwdriver loosen the tieline pull aut the wiring terminal pull it upward and then the electric box can be removed GREE Service Manual GWCO9AA KSNNA6A Page 123 Step Procedure 5 Remove isolation sheet 1 Twist off the 3 screws used for fixing the isolation sheet with screwdriver and then remove the isolation sheet Fou FT Ce Isolation sheet 1 Remove the sound proof sponge Remove the sound proof sponge used for wrap ping the compressor 8 Remove gas valve and liquid valve 1 Twist off the 2 bolts used for fixing the gas valve unsalder the soldering joint between gas valve and air return pipe and then remove the gas valve Note When unsoldering the soldering joint wrap the gas valve with wet cloth completely to avoid the damaged to valve due to high temperature Twist off the 2 bolts used for fixing the liquid valve unsolder the soldering jo
128. tem with N2 H2 Forming Gas mixture and the use of a Trace Gas Leak Detector Possible Leak finding methods applicable for GREE Air Conditioners ser vicing Direct Leak Finding Methods To be used as Soapy water bubble test with refrig erant pressure only Best practice is to combine different leak finding methods to provide a hermetically sealed refrigerant circuit Combine 2 amp 3 and if necessary 5 Not recom Must have Will be mended and do excellent Using an HC electronic Leak Leak Test Detector OFDN pressurised System and soapy water Bubble Test gt gt Forming gas pressurised sys tem and Trace Gas Detector GREE Service Manual GWCO09AA KBNNA6A 5 Pressurising the System with OFDN I et Segen X components are replaced Page 85 In general the Gree Air Conditioners are Factory Tested for compliance with international standards and regulations The factory test also includes a strength test The HC 290 Air Conditioner is rated for a Maximum Allowable Pressure PS of 40 bar 4 0 MPa For the new product installation and commissioning a sole Leak Test using a reliable Electronic HC Leak Detector has to be carried out Regular Preventive Maintenance requires activities following Best Servicing Practices by employing indirect refrigerant detection techniques Probably these activities may indicate requirements to carry out further direct detection proce dures Indirect
129. tes later the system restarts automatically and resume working with the pre assigned mode In case of tripping the overvoltage protection for overall six times in succession the system ceases operating except the indoor unit fan After that cutoff you _ Error Code should deactivate the system completely by the remote control unit and reboot Evaporator it temperature too high protection While the overvoltage protection is active the display of the indoor unit shows the error code E 5 In addition to that the operation indicator lamp flashes five Refer page 105 for further error times interrupted by a break of three seconds If the compressor runs for at code clarifica least six minutes at a stretch the counter for the overvoltage protector will be tions reset Evaporator Temperature To High protection GREE Service Manual GWCO9AA KSNNA6A Page 33 FAN MODE Using this mode the indoor unit fan runs at its preselected speed Any other part of the system compressor and outdoor unit fan is de energised The pre selection of temperature may range between 16 and 306 The indoor unit display signals the lcon OPERATION beside the preselected temperature AUTO MODE Opting the AUTO mode system changes to the action which considers close to the registered room condition COOLING or FAN Concerning the modes check against upside The indoor unit display shows you the icon OPERATION as well a
130. the unit Malfunction Name Indoor ambient temperature sensor is open short circuited Indoor evapora tor temperature sensor is open short circuited Outdoor ambient temperature sensor is open short circuited PG motor indoor fan motor does not operate Malfunction pro tection of jumper cap PG motor indoor fan circuit mal function by zero cross detection Freeze protection Low pressure protection of compressor Error A C Status The unit will stop operation as it reaches the temperature point During cooling and drying operation except when indoor fan operates other loads such as compressor outdoor fan 4 way valve stop operation During heating operation the complete unit stops operation The unit will stop operation as it reaches the temperature point During cooling and drying operation except when indoor fan operates other loads stop operation During heating operation the complete unit stops operation The unit will stop operation as it reaches the temperature point During cooling and drying operation compressor stops and indoor fan operates During heating op eration the complete unit stops opera tion Indoor fan outdoor fan compressor and electric heat tube stop operation 2 min utes later 4 way valve stops horizontal louver stops at the current position Operation of remote controller or control panel is available but the unit won t act Operation of remot
131. tion of in and outdoor 066 DIV AMOOG snee 032 The quick coupler 067 System protective 033 Commissioning of the AC 068 Fan and auto 034 Checks before 068 GREE Service Manual GWCO9AA KSNNA6A Page 3 Table of Content 2 Refrigerant circuit 068 Service label 103 First operation of the 068 Dismantling Recycling and disposal 104 LES 068 Error codes LED flashing and trouble shooting 105 URI nennen 069 Temperature sensor trouble shooting 106 Handing over the system to your client 069 PG motor H6 trouble 107 Start up data 070 Jumper cap C5 trouble shooting 108 Service repair and 071 Freeze protection E2 trouble shooting 109 D
132. tlet valve to the trace gas transfer hose T is closed Ensure that the trace gas transfer hose with the connection at the suc tion line service port L consists of a core depressor to open the ser vice port inner core valve during connection Connect the trace gas cylinder with transfer hose T to the service port 5 T L of the outdoor units low side stop valve L 6 HL Open the outdoor units low side and high side stop valves Open the trace gas cylinder valve A Adjust the pressure regulators pressure adjusting handle screw to E _ H about 5 bar 72 5 PSI shown at the delivery pressure gauge 9 Open slowly the pressure regulators outlet valve Trace gas is now transferred into the complete AC system Continue 10 the transfer of gas until there is no further flow audible pressure equalisation and 5 bar 72 5 PSI is indicated Watch the gauge for pressure loss EINEN Close the pressure regulators outlet valve Carry out the Leak Test and hold the sensor head of the trace gas leak detector as close as possible over the heat exchangers refriger 12 ant transferring pipes and mechanical connections Move the sensor head slowly along the components with a maximum of 0 2 cm per second of speed Repeat the screening test until you are confident that no leaks exist Remove the trace gas transfer hose from the service port Carefully open the service ports Schrader valve using a valve pin depress
133. turn on the display s light and press this button again to turn off the display s light If the light is turned on xx is displayed If the light is tunrned off a disappears Combination of and buttons About lock Press case pressing any button a blinks ihree times Combination of MODE and buttons About switch between Fahrenheit and Centigrade At unit OFF press MODE and buttons simultaneously to switch between F and Replacement of batteries 1 Remove the battery cover plate from the rear of the remote controller 2 Take off the used batteries Insert two new AAA1 5V batteries and pay attention to the polarity 4 Reinstall the battery cover plate Please notice When replacing the batteries do not use used or differ ent types of batteries otherwise it may cause malfunc tion If the remote controller will not be used for a long time please remove batteries to avoid leaking Make sure that used batteries are disposed of according to local regulations Most often batteries are not allowed to be part of domestic waste If the remote controller does not operate correctly please take the batteries out and reinsert them after at least 30 seconds If the malfunction is still valid replace the batteries GREE Service Manual GWCO09AA KBNNA6A Battery Replacement buttons simultaneously to lock or unlock the keypad the remote controller is locked is disp
134. ughout the entire room There shall be no electric appliance power switch or socket under the in door unit There should be a minimum distance of about 1 m from TV sets or any other electric appliances GREE Service Manual GWCO9AA Modification of refrigerant trans fer pipes is not permitted Page 57 Installation Dimension Diagram aa Space to the wall 65cm to the wall Mi Min ir outlet side Space to the obstruction S gt gt inlet side Min b P um Air outlet side GREE Service Manual GWCO9AA KSNNA6A Page 58 Installation Check List Carefully asses the local conditions and consider that all safety measures are in place Check the needs for installation in order to arrange a smooth and uninterrupted work flow Remember if you cannot work safe with HC refrigerants don t do it In general the GREE Hydrocarbon 290 AC Split System must be set up and configured to original factory specifications and tolerances No Precondition for Installation pe 5 1 instalation Service _ 3 The room size smaller tnan tne tmit in tris manual 4 Walls can hand the instanation of indoor andoutdoorunt 75 Nodsnptontothe envionment YY 6 no damage orl
135. ulse free bar measurement indication gauges 68 mm with refrigerant scale for HC R 290 R600a and HCFC R 22 including two refrigerant hoses 1 4 SAE 900mm one refrigerant hose 1 5 SAE 1200mm one 3 8 SAE Vacuum Page 130 Digital vacuum gauge resolution 1 micron Reads vacuum in 7 units Micron PSI InHg mbar Pascal Torr mTorr Cleaning part for cleaning of sensor Accuracy 10 Micron from 100 1000 Micron Overpressure protected up to 20 bar Complete set including PE box Two stage rotary vacuum pump Swept volume minimum 170 L min 6 CFM Final partia pressure 0 020 mbar Oil level indicator with easy oil change capabilities Normal and efficient operation in high ambient temperatures and high humidity conditions and to start under vacuum of 5 mbar 230 1 50 60 power requirement Hose connection 1 4 and 3 8 SAE and solenoid valve Pump to be equipped with gas ballast valve to prevent internal humidity condensation and corrosion and oil mist filter with connection 1 2 for refrigerant vent hose Including 2 liter of spare vacuum pump oil Electronic charging scale witn range of O to 5000 gr and 0 5 gr resolution Electronic weighing scale designed for charging and recovery Capacity 50 Resolution 5gr Accuracy 0 5 of reading measuring units in kg and ib Zero function Battery powered and low battery indication Rugged portable case CE certification HC refrigerant recovery unit f
136. uring your period of ab sence Use appropriate signs Make sure of a correct grounding during maintenance as demanded by regulations In case of transporting the refrigerant cylinders assure yourself that the cylinder pressure is not above the allowed pressure Place cylinders only in an upright position and make sure that the cylinder is not placed nearby heat or fire sources sources of radiation or electric devices In exceptional cases it might be necessary to dismantle the system and to bring it to an authorised service centre However all services could be done to the unit locally Become familiar with the operation of a gas detector Leave it turned on in the immediate working area during maintenance in order to get an early warning about leaking gas Before beginning maintenance ensure sufficient security and emergency measures are provided and ready for operation Ensure an appropriate fire extinguisher COs or dry powder is ready for use GREE Service Manual GWCO9AA Page 71 Regular Annual Preventive Maintenance In general the regular and preventive maintenance is limited to cleaning activi ties and to scrutinise the system functions and parameters This is to verify that the system is operating in safe condition and with expected efficiency The fol lowing procedures describe how to carry out professional maintenance of the HC R 290 air conditioner Required maintenance of the indoor un
137. urns flush with water to normalize temperature Cover the burns with sterile dressings Do not use ointments or powders Obtain medical assistance immediately Eyes Cold burns should be flushed with water to normalise temperature cover the eye with a sterile dressing and obtain medical assistance immediately GREE Service Manual GWCO9AA KSNNA6A Page 40 Fire Fighting Measures HC R 290 is delivered stored and used at temperatures above their flash point Avoid all naked flames sparks cigarettes etc e Incase of fire immediately alert fire brigade e Ensure an escape path 15 always available from any fire e f gas has ignited do not attempt to extinguish but stop gas flow and allow to burn out e Use water spray to cool heat exposed containers and to protect surround ing areas and personnel effecting the shut off e Every precaution must be taken to keep containers cool to avoid the pos sibility of a boiling liquid expanding vapour explosion BLEVE Extinguishing Media In case of a large fire Release must be stopped and container cooled by water spray Water mist should be used to assist approach to the source of the fire Large fires should only be handled by Fire Brigade DO NOT USE WATER JET Small fire Use dry powder extinguisher DO NOT USE WATER OR FOAM Special protective equipment for fire fighters In confined spaces use self contained breathing apparatus Hazardous combustion products
138. ut of the indoor unit on the right and on the left side as well as on the backside left on the backside right 1 If you want to lead the main power cable with socket from the right or from the left side cut off the tailings 1 on the operational side 2 Cut off tailing 2 if you want to lead out both the main power cable the in door to outdoor connection wires and the refrigerant piping Mounting plate Tailing 2 Tailing 1 Hang up the indoor unit to the mounting plate and make sure that it is fixed tightly After checking the installation close the cable channel which is located inside the wall by using operational resources such as plaster or mortar GREE Service Manual GWCO9AA KSNNA6A Page 64 Installation of the outdoor unit Consider the above mentioned selection criteria when choosing the installation site and refer to the installation diagram because of the minimum distances to be kept for installation Mount the unit to solid ground fix it securely and free of any vibration Possibly use a shock absorbing substructure such as a mounting bar For mounting the unit up to wall brackets use specific heavy duty dowels and special screws in accordance to the consistency of the wall Use vibration dampers to prevent a transmission of oscillations and vibrations from the unit to the wall Make sure to mount the outdoor unit with a maximum descent not exceeding 3 In any case make sure when there is an unavoida
139. venting Leave Ensure that no unauthorised persons are within vulner a slight overpressure in the system 16 If a leak was found in step 12 repair the leak or replace the leaky able locations component and continue with steps 5 and 7 to 14 in case of an Close the outdoor units low side and high side stop valves front seated inadvertent 17 L posiliani pressure burst GREE Service Manual GWCO09AA KSBNNA6A Page 95 Refrigerant Circuit Evacuation and Charging Refrigerant Hose E Connection Hose valve A L Outdoor Unit A Connection Hose valve B Vacuum Pump Manifold gt Pressure Gauge Manifold gt Vacuum Pump Manifold gt Refrigerant Cylinder Connection Hose valve gt R 290 Cylinder E Manifold Vacuum Gauge Connection Hose valve D gt Vacuum Gauge Outdoor Unit Liquid Side High _ Outdoor Unit Gas Side Low d 2 ITE 54V DIGITAL VACUUM GAUGE Indoor Unit Outdoor Unit GREE Service Manual GWCO9AA KSNNA6A Page 96 Refrigerant Circuit Evacuation The Gree HC Air Conditioner as previously explained is an intrinsic safe system which comes factory pre assembled and already charged with 290 refrigerant ready for installation and commissioning at the client s site The con tent of impurities non condensable gases e g air nitrogen etc and humidity within the refrigerant circuit is better than th
140. y The pressure in the system shall be built up gradually and monitored by remote gauge or other indicator located in a safe place Use the Nitrogen cylinders outlet pressure gauge or an intermediate pressure gauge between pressure regulator and AC outdoor unit for pressure monitoring Do not use the manifold gauge set for strength test pressure monitoring This 1 a dangerous practice and may cause violation Ensure that the pressure regulator at the Nitrogen cylinder is suitable for the use with RAC systems maximum output 50 bar Ensure that no un authorised persons are within vulnerable locations in case of an inadver tent pressure burst Example of an intermediate Hose N installed pressure gauge 588 EROUS AREA po NOT ENTER GREE Service Manual GWCO09AA KBNNA6A Interconnection of the Manifold Gauge Set should only be consid ered for refriger ant handling or low pressure OFDN use High pressure OFDN use will cause early me chanical wear of the gauge set and manifolds sup plied with sight glass can cause violation by acci dentally pressing out the glass from the body Never switch ON the AC system if charged with OFDN The Pressure Test Value for the AC system Strength Test is at 1 1 times the Maximum Allowable Pres sure PS which is indicated at the outdoor units data plate Pressure Test Value z 1 1 x PS 40 bar 44 bar 4 4 MPa Page 94 Pressure Test Stren
141. y cylinder should be monitored closely by control ling the weight It is recommended to place and then to leave the cylinder on a digital scale Pay attention not to overfill the cylinder The cylinder is only allowed to be filled up to 80 of its complete volume by liquid refrig erant e The pressure must be controlled in order to ensure that the permissible pressure of the cylinder is not exceeded at any time e After filling the cylinder must be marked with the mass and the type of refrigerant recovered e The recovery machine should be operated until the pressure reduces to 0 3 bar absolute pressure R 290 is soluble to oil This may lead to a rise in pressure because the refrigerant vaporises from oil It may be neces sary to operate the recovery machine for a second or even a third time e Small amounts of R 290 can be vented in safe manner to the environ ment e Remaining amounts of HC absorbed by the oil can be extracted from the system using a vacuum pump in combination with an exhaust vent hose e second two way excess recovery cylinder can be used in serial con nection to act as an oil separator e After the systems pump out the system should be flushed with oxygen free dry nitrogen OFDN in order to ensure no flammable gas are inside the system GREE Service Manual GWCO9AA KSNNA6A Page 43 Repair of leaks System leaks must be immediately repaired by authorised personnel after be coming acquainted If they

Final Draft Gree Installation and Service Manual 06-11-11_RK

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