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Gree GWC07NA-D3NNA5E, Service Manual

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Gree GWC07NA-D3NNA5E Service Manual Download Page 99

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3*PRWRULQGRRUIDQFLUFXLWPDOIXQFWLRQE\]HURFURVV8

M alfunction is 

eliminated.

No

Yes

     “U8” is 
displayed on 
   the unit.

Re-energize 1 
minute after 
de-erergization

       Is“U8”
still displayed?

The zero-cross detection 
circuit of the mainboard is 
defined abnormal. Replace 
        the mainboard.

The unit returns to normal. 
Conclusion: U8 is displayed due to 
instant energization after de-
energization while the capacitor 
discharges slowly.

Summary of Contents for GWC07NA-D3NNA5E

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Page 19: ...io 0 20 40 60 80 100 120 15 13 11 9 7 5 3 1 1 3 5 7 9 11 Outdoor temp Capacity ratio Condition Indoor DB27 WB19 Indoor air flow Super High Pipe length 7 5m Condition Indoor DB20 Indoor air flow Super High Pipe length 7 5m RROLQJ RROLQJ RROLQJ HDWOLQJ HDWOLQJ 50 60 70 80 90 100 110 0 15 10 5 0 5 10 20 40 60 80 100 120 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Outdoor Temp Outdoor Temp Capacity r...

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Page 21: ... QPUVTWEVKQP 8KGYU RQVWUXFWLRQ 9LHZV QGRRU 8QLW 0RGHO 1 11 0 11 694 194 52 542 172 131 2XΦ55 2XΦ70 2XΦ55 W D H 179 746 253 605 150 35 2XΦ55 8QLW PP ...

Page 22: ... QPUVTWEVKQP 8KGYU 2XWGRRU 8QLW 660 25 428 5 286 720 310 440 8QLW PP 8QLW PP ...

Page 23: ... QPUVTWEVKQP 8KGYU 8QLW PP ...

Page 24: ... QPUVTWEVKQP 8KGYU 8QLW PP ...

Page 25: ...MPRESSOR GAS SIDE 3 WAY VALVE LIQUID SIDE 2 WAY VALVE COOLING HEATING Accumlator Discharge Suction 4 Way valve Strainer Strainer INDOOR UNIT OUTDOOR UNIT HEAT EXCHANGER EVAPORATOR HEAT EXCHANGER CONDENSER COMPRESSOR GAS SIDE 3 WAY VALVE LIQUID SIDE 2 WAY VALVE COOLING Accumlator Discharge Suction Capillar Capillary y Strainer 1 Cooling Only Models 2 Cooling and Heating Models ...

Page 26: ...O 3DUWV 1DPH 6 PERO RORU 6 PERO 5 725 7 3 35 17 5 8 7 2 5 2 1 9 2 1 211 725 5 5 7 6 7 29 5 2 1 52 1 203 2035 6625 8 8 3527 7 9 57 1 2 5 1 6FKHPDWLF LDJUDP OHFWULFDO LULQJ Ɣ QGRRU 8QLW Ɣ OHFWULFDO DWD 0HDQLQJ RI PDUNV 1 11 N L ...

Page 27: ...ING N1 YEGN GN BU BK BU WH BN BK POWER TUBETEMP ROOMTEMP SENSOR SENSOR TUBE RT1 RT2 ROOM AP2 PRINTED CIRCUITBOARD JUMP CAP OUTDOOR UNIT SWING UD M2 N 1 2 XT BU BK YEGN EVAPORATOR PE YEGN PGF PG FAN MOTOR M1 TERMINAL BOARD CONNECTING CABLE TC TR_OUT TR_IN TRANSFORMER N L II I 0 11 0 11 0 11 2 4 5 N L I I I ...

Page 28: ...ING UD SWING BLOCK TERMINAL BK BU XT 2 N 1 CABLE YEGN CONNECTING YEGN PE EVAPORATOR 0 0 N L 0 11 L 4 COMP 3 BU BK VT OG POWER EVAPORATOR PE PE EARTH PLATE BU BK XT VT OG 5 4 2 N 1 OUTDOOR UNIT CAP JUMP AP1 PRINTED CIRCUIT BOARD RT2 RT1 AP2 BU WH BN BK YEGN GN CABLE CONNECTING TEMP ROOM SENSOR YEGN YEGN BLOCK TERMINAL TEMP TUBE SENSOR M1 PGF PG FANMOTOR DISPLAYBOARD RECEIVERAND DISP1 DISP2 TUBE ROO...

Page 29: ... SENSOR SENSOR ROOM TUBE RECEIVER DISPLAY DISP2 AP1 DISP1 COMP YEGN TEMP TEMP 0 11 N 1 2 3 BN BK BU XT1 BN BK BU WH YEGN GN POWER M2 SWING UD DISPLAY SWING HPP BU TRANSFORMER OUTDOOR UNIT N L OFAN 4V R CN BK X1 MOTOR SWING PE EVAPORATOR CONNECTOR I I TC I 2 1 3 1 1 3 4 X3 BU YE BK WH BU YE BK WH M1 BN RD FANC2 FAN M FAN H FANC1 N1 FAN L YEGN FAN MOTOR PE YE TR OUT TR IN CONNECTOR CONNECTOR X2 OG V...

Page 30: ...BN BK BU XT1 BN BK BU WH YEGN GN POWER M2 SWING UD DISPLAY SWING TRANSFORMER OUTDOOR UNIT N L 0 11 N 1 2 3 BN BK BU XT1 BN BK BU WH YEGN GN POWER M2 SWING UD DISPLAY SWING TRANSFORMER OUTDOOR UNIT N L OFAN 4V CN BK X1 MOTOR SWING PE EVAPORATOR CONNECTOR I I TC I HPP N X3 BU YE BK WH BU YE BK WH M1 BN RD FANC2 FAN M FAN H FANC1 N1 FAN L YEGN FAN MOTOR PE TR OUT TR IN CONNECTOR CONNECTOR OG VT CABLE...

Page 31: ... 5EJGOCVKE KCITCO Ɣ2XWGRRU 8QLW 1 11 2 0 11 2 ...

Page 32: ... 5EJGOCVKE KCITCO 0 11 2 0 11 2 0 11 2 MOTOR M2 FAN M1 N 1 INDOOR UNIT YEGN BK BU BU BK BU YE BU C1 BN C2 RD S X BK C U E R M V E YEGN COMP E E YEGN MOTOR E 2 BK BN XT1 0 11 2 0 11 2 0 11 2 ...

Page 33: ...8BN 9BU 1 0 4 6 BK BU RD BN 10BK BU BK BN FAN MOTOR XT1 TERMINAL BOARD CAP CAP AC CONTACTOR 0 11 2 BU YEGN COMP VT W10 W9 W6 YEGN BN W8 W4 BU YE W3 W2 BK W7 W1 INDOOR UNIT 1 C1 FAN MOTOR E M 4 OG S R COMP E C BU CONTACTOR 0 1 KM 6 BN RD 4YV C2 BK XT2 YEGN BU BK 2 N 1 XT1 3 BK BN 2 X1 TEM SENSOR TUBE 0 RT1 X2 BU W5 2 1 W11 BU W12 BU 2 1 ...

Page 34: ...N BU YEGN PE PE C T U S W X R M V C1 J1 YEGN PE PE C2 KM N 1 2 3 MOTOR M BK HPS P HIGH SWITCH PRESSURE PE TERMINAL BOARD COMP COMP 0 11 2 INDOOR UNIT 0 X6 RT2 16YE 17WH 18YE 19BK X3 14BU 5BK 2BU 4YE 3BU COMP CONTACTOR BN 7BU YEGN PE 15BN P OUTTUBE TEM SENSOR TEM SENSOR OUTROOM SWITCH PRESSURE HIGH 9BN 8BK 1BU 6YEGN 1 KM 0 6 4 C N 1 3 2 BN BK BU 10BU PE C1 J E S COMP R 3 PE BK XT2 HPS X4 13OG 11YE ...

Page 35: ...ire of Health function 5 4 way valve control terminal 6 Outdoor fan 7 Auto button 8 Up down swing control terminal 9 Interface feedback from indoor fan 10 Display control terminal 1 11 Display control terminal 2 12 Interface of pipe temperature sensor 13 Interface of ambient temperature sensor 14 Compressor 15 Live wire 16 Fan capacitor 1 11 Ɣ723 9 Ɣ 27720 9 ...

Page 36: ...r feedback 8 Relay of controlling outdoor unit 9 Relay of controlling 4 way valve 10 Connected to display board DSP1 DSP2 11 Terminal of indoor tube temperature sensor 12 Terminal of indoor ambient temperature sensor 13 Fuse 14 Compressor relay and live wire terminal 15 Relay of controlling cold plasma 16 Piezoresistance 17 Fan capacitor 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 Ɣ723 9 Ɣ 27720 9 ...

Page 37: ...n 2 Connector of 4 way valve 3 PG motor feedback connector 4 PG motor drive connector 5 Up down swing connector 6 Display panel connector 7 Connector of ambient temperature sensor 8 Connector of tube temperature sensor 9 Compressor connector 1 2 3 4 5 6 7 8 9 Ɣ723 9 Ɣ 27720 9 ...

Page 38: ...l wire terminal for High Medium Low fan level Auto button Up down swing terminal Interface for display panel Pipe temp sensor Ambient temp sensor Live wire Output of transformer Fan motor capacitor terminal Input of transformer High pressure protection Ɣ723 9 0 11 0 11 Ɣ 27720 9 ...

Page 39: ...el Auto button Up down swing terminal Interface for display panel Pipe temp sensor Ambient temp sensor Live wire Terminal for outdoor ambient temp sensor and outdoor pipe temp sensor Terminal for 4 way valve Output of transformer Fan motor capacitor terminal Input of transformer High pressure protection Ɣ723 9 0 11 0 11 Ɣ 27720 9 ...

Page 40: ... Press it to set clock X FAN TEMP TURBO SLEEP LIGHT Press it to turn on off the light 17 15 18 19 16 20 21 23 24 22 25 MODE icon If MODE button is pressed current operation mode icon AUTO COOL DRY FAN or HEAT is only for heat pump models will show SLEEP icon is displayed by pressing the SLEEP button Press this button again to clear the display TEMP icon Pressing TEMP button set temperature indoor ...

Page 41: ...Each time you press this button a mode is selected in a sequence that goes from AUTO COOL DRY FAN and HEAT as the following Note Only for models with heating function 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 roo...

Page 42: ...et 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 SLEEP Press this button to...

Page 43: ... Freeze protection If the system is under freeze protection the compressor and the outdoor fan stop operation and the indoor fan operates at set speed If freeze protection is eliminated and the compressor has been out of operation for 3 minutes the unit will resume its previous running status 2 1 3 Overcurrent Protection If the system current exceeds the specified value in 3 successive seconds the...

Page 44: ...door fan will operate at low speed When freeze protection is eliminated and the compressor has been out of operation for 4 minutes the complete unit will resume its previous running status 2 2 3 Other protection Other protections are the same as those in cooling mode 2 3 Heating mode not available for cooling only type 2 3 1 Heating conditions and process When Tamb Tpreset 2 the unit starts heatin...

Page 45: ... timer OFF is set at unit OFF the system will keep standby status If timer OFF is set at unit ON upon OFF time reaches the unit will stop operation Timer Change Although timer has been set the unit still can be turned on off by pressing ON OFF button of the remote controller You can also set the timer once again and then e h t unit will operate according to the last setting If timer ON and timer O...

Page 46: ...me models if set temperature display is set by the remote controller current set temperature will be displayed After that when switching to room temperature display from set temperature or outdoor temperature by the remote controller room temperature will be displayed for 5 seconds firstly and then set temperature display returns 3 10 Locked protection to PG motor If the indoor fan motor keeps low...

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Page 49: ...15cm 300cm 250 cm 50cm 30cm 200cm 50cm 30cm 15cm Space to the obstruction Air outlet side Space to the wall Air inlet side e v o b A Above Above The dimensions of the space necessary for proper installation of the unit include the minimum permissible distances to adjacent parts ƽ Schematic diagram being reference only outdoor unit is with variation please refer to real product for authentic inform...

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Page 89: ...ll stop operation as it reaches the temperature point During cooling and drying operation compressor stops and indoor fan operates During heating operation the complete unit stops operation 1 The wiring terminal between outdoor ambient temperature 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 temperat...

Page 90: ...tch on the complete unit 3 The wiring of high pressure switch is loosened 4 Refrigerant is superabundant 5 Poor heat exchange including blocked heat exchanger and bad radiating environment 6 Ambient temperature is too high if it is 3 phase unit the high pressure protection may be caused by overcurrent protection due to this reason 7 The supply voltage is abnormal if it is 3 phase unit the high pre...

Page 91: ...or other types of units please refer to the detailed function requirement During cooling operation compressor stops while indoor fan motor operates During heating operation the complete unit stops 1 The communication line is not connected tightly or poorly contacted Poor contact of any line may cause communication malfunction 2 The match between main board and display panel is incorrect Indoor and...

Page 92: ...er with one of the same model End no no no yes yes Malfunction is removed no yes yes no Is the wiring terminal between temperature sensor and the controller loosened or poorly contacted Is there short circuit due to tripover of the pa rts Is the temperature sensor normal according to the Resistance Table Replace it with a temperature sensor of the same model no 0DOIXQFWLRQ RI WHPSHUDWXUH VHQVRU ...

Page 93: ... the wires according to the circuit diagram If the high pressure switch is broken or poorly contacted please replace it yes Malfunction is eliminated no Adjust the volume of refrigerant according to the requirement of the system yes Malfunction is eliminated no Adjust the unit to improve the heat exchange of unit yes Malfunction is eliminated no Decrease the ambient temperature yes Malfunction is ...

Page 94: ...re switch inserted well Re insert it tightly to ensure reliable contact Is the malfunction eliminated Replace the low pressure switch Is the higher than the acting value of the low pressure switch No Yes No Add refrigerant Is the malfunction eliminated Yes No No No Is the malfunction eliminated The controller is defined abnormal replace it Yes No End Yes Yes Yes Yes system pressure the switch ...

Page 95: ...bnormal but resist ancev alue of discharge sensor for compressor temperature is abno rmal Replace con trol panel End Check the system Eliminate the block age inside the system Check wiring and fan capacitor replace motor Check the unit to let air come in and come out smoothly Replace temperature sensor Problem is solved Problem is solved Problem is solved Problem is solved no no no no no no no no ...

Page 96: ...GUJQQVKPI RPPXQLFDWLRQ PDOIXQFWLRQ Poor contact of any line may lead to communication malfuntion Is there incorrect match between the main boaard and the display panel or between the indoor and outdoor boards ...

Page 97: ...an operate smoothly Is malfunction eliminated Reinsert the wiring terminal of indoor fan It s the malfunction of main board Replace the main board with the same model It s the malfunction of main board Replace the main board with the same model It s the malfunction of main board Replace the main board with the same model Start Whether the blade can operate smoothly Energize and restart upthe unit ...

Page 98: ... Install a matching jumper cap No Is the jumper cap inserted incorrectly or improperly Re insert the jumper cap The mainboard is defined abnormal replace it Yes No Yes End Is the malfunction eliminated Yes No No Yes Replace the jumper cap No Yes Is the malfunction eliminated Is the malfunction eliminated ...

Page 99: ...ayed on the unit Re energize 1 minute after de erergization Is U8 still displayed The zero cross detection circuit of the mainboard is defined abnormal Replace the mainboard The unit returns to normal Conclusion U8 is displayed due to instant energization after de energization while the capacitor discharges slowly ...

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Page 110: ... 4GOQXCN 2TQEGFWTG 1 2 1 2 filters clasps Before disassembly Remove filter Open front panel Push filter inwards and lift it up to remove it front panel ...

Page 111: ...clasps and then remove front panel Remove horizontal louver and electric box cover Loosen clasps of horizontal louver and slightly bend horizontal louver to remove it Remove screw fixing electric box cover and then remove the cover screws display panel horizontal louver screw electric box cover ...

Page 112: ...t case and then remove screws on front case Remove front case to separate it from rear case Remove electric box cover Remove screws of ground wire on electric box cover Loosen clasps and then remove electric box cover screw caps screws front case screws of ground wire clasps ...

Page 113: ...OQXCN 2TQEGFWTG 1 2 Remove electric box subassembly Unplug indoor pipe temp sensor Remove screws of electric box and then remove the electric box clasps electric box cover temp sensor screws electric box 7 ...

Page 114: ...porator Remove connection pipe and wire between indoor and outdoor units Remove screws fixing mounting plate and then remove the mounting plate of evaporator Remove screws fixing evaporator and slightly adjust pipe of evaporator Then remove evaporator with caution water tray mounting plate evaporator pipe evaporator ...

Page 115: ... separate the cross flow blade from motor Separate cross flow blade and bearing holder Remove cross flow blade and motor Remove 2 screws fixing motor and then remove mounting plate of motor Remove retaining screws of cross flow blade and motor screws screws cross flow blade motor bearing holder ...

Page 116: ... DOO SRZHU VXSSOLHV EHIRUH GLVDVVHPEO XW WDNH KHDW SXPS IRU H DPSOH b handle a 1 Remove big handle Before disassembly Remove the screw fixing the big handle Remove the big handle Remove the 3 screws connecting the top panel with the front panel and the right side panel Remove the top cover 2 Remove top panel top panel ...

Page 117: ...move front grille Remove the 5 screws connecting the front panel with the chassis and the motor support Remove the front panel Remove the 6 screws connecting the right side panel with the chassis the valve support and the electric box Remove the right side panel 4 Remove right side panel right side panel front grille front panel ...

Page 118: ...sconnect the leading wire insert of the motor Remove the motor Remove the tapping screws fixing the motor support Lift the motor support to remove it Remove screws fixing the electric box subassembly Loosen the wire bundle unplug the wiring terminals and lift the electric box to remove it 6 Remove electric box electric box motor motor support axial flow blade ...

Page 119: ...rews fixing the isolation sheet Remove the isolation sheet Remove the soundproof sponge wrapping the compressor Remove the screw fixing the magnet moil Remove the coil 8 Remove soundproof sponge 9 Remove magnet moil soundproof sponge isolation sheet magnet moil ...

Page 120: ... the welding joint connecting the liquid valve and the Y type pipe Remove the liquid valve NOTE Discharge the refrigerant completely before unsoldering Unsolder welding joint connecting the capillary the valve and the outlet pipe of condenser to remove the capillary Do not block the capillary with welding slag during unsoldering Unsolder the pipes connected to the compressor Unsolder the welding j...

Page 121: ... Remove big handle Remove the connection screw fixing the big handle and then remove the handle 3 Remove top cover plate Remove connection screws connecting the top panel with the front panel and the right side plate and then remove the top panel big handle top panel Steps ...

Page 122: ...move front panel Remove connection screws connecting the front panel with the chassis and the motor support and then remove the front panel 6 Remove right side plate Remove connection screws connecting the right side plate with the valve support and the electric box Then remove the right side plate Steps front grill front panel right side plate ...

Page 123: ...and disconnect the leading wire insert of the motor Then remove the motor Remove the 2 tapping screws fixing the motor support and lift the motor support to remove it 9 Remove electric box Remove screws fixing the electric box subassembly loosen the wire bundle and unplug the wiring terminals Then lift the electric box to remove it motor motor support electric box axial flow blade Steps ...

Page 124: ...he isolation sheet and then remove the isolation sheet 11 Remove soundproof sponge Remove the soundproof sponge wrapping the compressor 12 Remove magnet coil Remove the screw fixing the magnet coil and then remove the coil isolation sheet soundproof sponge magnet coil Steps ...

Page 125: ... during unsoldering Remove the 2 screws fixing the gas valve and unsolder the welding joint between the gas valve and the air return pipe to remove the gas valve NOTE Discharge the refrigerant completely before unsoldering when unsoldering wrap the gas valve with a wet cloth completely to avoid damage to the valve caused by high temperature Remove the 2 screws fixing the liquid valve and unsolder ...

Page 126: ... screws connecting the top panel with the front panel and the right side plate and then remove the top panel a Remove the screws connecting the grille and the panel and then remove the grille 2 Remove grille and panel grille top panel Remove the screw fixing valve cover to remove the cover valve cover ...

Page 127: ...ve the screws connecting the right side plate with the chassis the valve support and the electric box and then remove the right side plate assy b Remove the screws connecting the left side plate and the chassis and then remove the left side plate assy 3 Remove left side plate and right side plate panel rightsideplate leftsideplate ...

Page 128: ...ng the motor disconnect the leading wire insert of the motor and then remove the motor Remove the 2 tapping screws fixing the motor support and then pull the motor support upwards to r emove it Remove the screws fixing the electric box sub assy loosen the wire bundle pull out the wiring terminals and then pull the electric box upwards to remove it axial flow blade electric box motor ...

Page 129: ...ssy Recover the refrigerant before unsoldering Discharge the refrigerant completely unsolder the pipelines connecting the compressor and the condenser assy and then remove the 4 way valve assy Remove the screws fixing the isolation sheet and then remove the isolation sheet 7 Remove compressor 8 Remove chassis sub assy and condenser sub assy 4 way valve assy compressor isolation sheet a ...

Page 130: ...GFWTG b Remove the screws connecting the support condenser and condenser assy and then remove the support condenser c Dissemble the chassis sub assy and condenser sub assy condenser sub assy chassis sub assy support ...

Page 131: ... 2 Remove panel grill and panel Unscrew the screws of fixing panel grill and panel by screwdriver to remove the panel grill panel grill front side panel top cover valve cover Use the screwdriver to remove the screws connecting the top panel and panel and side panels Remove the top panel Loosen the screws fixing the valve cover and then remove the valve cover XW WDNH KHDW SXPS IRU H DPSOH ...

Page 132: ... support by screwdriver to remove the panel 3 Remove rear grille Disassemble the screws fixing rear grille and right left side panel by screwdriver to remove the rear grille 4 Remove handle Unscrew the screws fixing handle by screwdriver to remove the handle handle panel rear grille ...

Page 133: ...move right side plate assy Unscrew the connection screws of right side plate and chassis valve support and condenser assy to remove the right side plate assy 7 Remove 4 way valve assy Unsolder the pipeline connect compressor condenser assy gas valve and liquid valve to remove the 4 way valve Must discharge the refrigerant first 4 way valve assy right side plate assy electric box assy ...

Page 134: ...late and chassis by screwdriver to remove the left side plate 9 Remove axial flow louver Unscrew the nuts of louver by wrench to remove the axial flow louver 10 Remove motor Unscrew the tapping screws fixing motor pull out the pin of leading wire to remove the motor motor axial flow louver left side plate ...

Page 135: ...of gas valve and return air pipe t remove the gas valve Note Please wrap the gas valve completely by wet cloth to avoid high temperature damage valve when unsoldering the spot weld and discharge the refrigerant Unsolder the spot weld of liquid valve and connection pipe of liquid valve to remove 13 Remove compressor Unscrew the 3 foot nuts of compressor to remove the compressor compressor valve ass...

Page 136: ...n sheet 15 Remove isolating support plate condenser Unscrew the screws of isolating support plate condenser and condenser assy to remove the isolating support plate condenser 16 Remove chassis assy and condenser assembly Lift it upward to remove to disassemble chassis assy and condenser assembly chassis assy condenser assembly isolation sheet assy support plate ...

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