Lennox Y6760 Service Manual Download Page 13

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Technical Information

Service Manual

4. Refrigerant System Diagram

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

COOLING

HEATING

Accumlator

4-Way valve

COOLING

Discharge

Suction

Discharge

Suction

Heat

exchanger

(evaporator)

Heat

exchanger

(evaporator)

Heat

exchanger

(condenser)

Heat

exchanger

(condenser)

Valve

Liquid pipe

side

Gas pipe

side

Liquid pipe

side

Gas pipe

side

Compressor

Accumlator

Compressor

Strainer

Capillary

Connection pipe specification:
Liquid pipe:1/4" (6mm)
Gas pipe:3/8" (9.52mm)(LM009CI-100T432-1 LM009CO-100T432-1)
Gas pipe:1/2" (12mm)(all models except LM009CI-100T432-1 LM009CO-100T432-1)

Summary of Contents for Y6760

Page 1: ...lecting LENNOX air conditioners Service Manual Models LM009CI 100T432 1 LM009CO 100T432 1 LM012CI 100T432 1 LM012CO 100T432 1 LM018CI 100T432 1 LM018CO 100T432 1 LM024CI 100T432 1 LM024CO 100T432 1 Re...

Page 2: ...ontrol 16 6 1 Remote Controller Introduction 16 6 2 Brief Description of Modes and Functions 20 Part Installation and Maintenance 24 7 Notes for Installation and Maintenance 24 8 Installation 26 8 1 I...

Page 3: ...Removal Procedure 58 11 1 Removal Procedure of Indoor Unit 58 11 2 Removal Procedure of Outdoor Unit 68 Appendix 86 Appendix 1 Reference Sheet of Celsius and Fahrenheit 86 Appendix 2 Configuration of...

Page 4: ...ual 1 Summary Indoor Unit LM009CI 100T432 1 LM012CI 100T432 1 LM018CI 100T432 1 LM024CI 100T432 1 LM009CO 100T432 1 LM012CO 100T432 1 LM018CO 100T432 1 LM024CO 100T432 1 Part Technical Information Out...

Page 5: ...100T432 1 Indoor Unit Product Code Y6760 Y6762 Fan Type Cross flow Cross flow Diameter Length DXL mm 98X580 98X633 5 Fan Motor Cooling Speed SH H M L SL r min 1350 1200 1050 800 1350 1200 1050 850 Fan...

Page 6: ...RLA A 0 37 0 33 Fan Motor Capacitor F 2 5 2 5 Air Flow Volume of Outdoor Unit m3 h 1600 1800 Fan Type Axial flow Axial flow Fan Diameter mm 394 5 394 5 Defrosting Method Climate Type T1 T1 Isolation I...

Page 7: ...I 100T432 1 LM024CI 100T432 1 Indoor Unit Product Code Y6764 Y6766 Fan Type Cross flow Cross flow Diameter Length DXL mm 106X706 108X830 Fan Motor Cooling Speed SH H M L SL r min 1350 1200 1050 900 13...

Page 8: ...A A 0 75 0 56 Fan Motor Capacitor F 3 3 5 Air Flow Volume of Outdoor Unit m3 h 2800 3200 Fan Type Axial flow Axial flow Fan Diameter mm 460 520 Defrosting Method Climate Type T1 T1 Isolation I I Moist...

Page 9: ...9 35 24 LM012CI 100T432 1 LM012CO 100T432 1 0 8 1 1 in 10 14 out 11 14 in 69 74 out 38 45 Super High High 27 19 35 24 LM018CI 100T432 1 LM018CO 100T432 1 0 8 1 0 in 8 11 out 11 14 in 75 85 out 37 43 S...

Page 10: ...4 168 5 462 159 5 55 55 54 206 685 187 70 70 43 43 154 79 3 Outline Dimension Diagram 3 1 Indoor Unit Unit mm LM009CI 100T432 1 LM012CI 100T432 1 LM018CI 100T432 1 LM024CI 100T432 1 Model W H D LM009C...

Page 11: ...8 Technical Information Service Manual 3 2 Outdoor Unit LM012CO 100T432 1 LM009CO 100T432 1 848 257 540 286 320 763 540 Unit mm Unit mm 712 776 510 320 257 286 540...

Page 12: ...9 Technical Information Service Manual LM024CO 100T432 1 Unit mm Unit mm LM018CO 100T432 1 378 8 931 47 0 8 6 549 8 4 3 300 963 560 897 340 396 364 700...

Page 13: ...tor Heat exchanger evaporator Heat exchanger condenser Heat exchanger condenser Valve Valve Valve Valve Liquid pipe side Gas pipe side Liquid pipe side Gas pipe side Compressor Accumlator Compressor S...

Page 14: ...LM012CI 100T432 1 Symbol Symbol Color Symbol Symbol Color Symbol Name WH White GN Green CAP Jumper cap YE Yellow BN Brown COMP Compressor RD Red BU Blue Grounding wire YEGN Yellow Green BK Black VT V...

Page 15: ...24CO 100T432 1 7 6 1625 7 03 6 1625 7 03 6 1625 57 57 5220 78 67 33 1 63 35 17 5 8 7 2 5 5 9 5 1 63 2 5 211 7 1 203 6 1 6 1 8 02725 2 7 50 1 1 1 1 8 1 32 5 3 803 3 8 1 9 325 725 3 1 8 7 1 0 3 3 1 5 72...

Page 16: ...100T432 1 Outdoor Unit LM018CO 100T432 1 MOTOR M2 FAN M1 N 1 INDOOR UNIT YEGN BK BU BU BK 63613294 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 C2 BN COMP BK YE BU...

Page 17: ...14 Technical Information Service Manual LM024CO 100T432 1 These wiring diagrams are subject to change without notice please refer to the one supplied with the unit 6361000001802...

Page 18: ...Interface of neutral wire for cold plasma 5 Interface of PG motor 6 Interface of outdoor fan 7 Interface of 4 way valve 8 Interface of live wire of cold plasma 9 Interface of up down swing 10 Feedbac...

Page 19: ...putting through the power the air conditioner will give out a sound Operation indictor is ON red indicator After that you can operate the air conditioner by using remote controller Under on status pr...

Page 20: ...17 Technical Information Service Manual AUTO COOL DRY FAN HEAT OFF...

Page 21: ...18 Technical Information Service Manual battery Cover of battery box remove reinstall...

Page 22: ...19 Technical Information Service Manual...

Page 23: ...g to indoor ambient temperature There swill be 30s delayed for protection between mode switchover When Tamb 26 C unit will be in cooling mode Ex factory set temperature is 25 C Cooling only unit When...

Page 24: ...stated up again Blocked information of IDU fan motor will be eliminated For some models they can only be restated up after re energized Please refer to maintenance part for display information and dis...

Page 25: ...the same time during operation of the unit the unit will keep running at current status till OFF time reaches Upon ON time reached the system will be turned on automatically The unit will operate circ...

Page 26: ...ntent ON status mode up down swing light set temperature set fan speed general timer Fahrenheit Celsius General timer can be memorized Time of timer is calculated again from energization Clock timer c...

Page 27: ...unit adequately grounded The grounding wire can t be used for other purposes 6 Must apply protective accessories such as protective boards cable cross loop and wire clip 7 The live wire neutral wire a...

Page 28: ...tape 4 Electroprobe 7 Electronic leakage detector 10 Pipe pliers pipe cutter 2 Screw driver 5 Universal meter 8 Vacuum pump 11 Pipe expander pipe bender 3 Impact drill drill head electric drill 6 Torq...

Page 29: ...t 15cm At least 50cm At least 50cm At least 30cm At least 300cm At least 200cm Space to the Space to the obstruction Space to the obstruction Space to the obstruction Space to the ceiling Space to the...

Page 30: ...or unit Make the bound pipes pass through the wall hole and then connect outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installat...

Page 31: ...nstalled in the laundry 2 Grounding Requirement 1 The air conditioner is first class electric appliance It must be properly grounding with specialized grounding device by a professional Please make su...

Page 32: ...19 70 75 Refer to the following table for wrench moment of force Fig 5 Fig 6 Fig 7 5 Connect the Pipe of Indoor Unit 1 Aim the pipe joint at the corresponding bellmouth As show in Fig 5 2 Pretighteni...

Page 33: ...e refer to the actual one Wire clip Wiring board Grounding wire 2 N 1 Indoor unit Gas pipe Indoor and outdoor power cord Liquid pipe Drain hose Band Drain hose Band Connection pipe Indoor power cord 1...

Page 34: ...the Support of Outdoor Unit Select it according to the actual installation situation 1 Select installation location according to the house structure 2 Fix the support of outdoor unit on the selected...

Page 35: ...function or damage the parts 7 Is the unit grounded securely It may cause electric leakage 8 Does the power cord follow the specification It may cause malfunction or damage the parts 9 Is there any ob...

Page 36: ...r cap C5 Operation of remote controller or control panel is available but the unit won t act 1 There s not jumper cap on the main board 2 Jumper cap is not inserted properly and tightly 3 Jumper cap i...

Page 37: ...t stops 1 Outdoor and indoor heat exchangers are too dirty or the air inlet outlet is blocked 2 Fan motor is not working Abnormal fan speed fan speed is too low or the fan doesn t run 3 Compressor doe...

Page 38: ...oken Malfunction diagnosis process Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted Start Insert the temperature sensor tightly Yes Yes Yes Yes Yes...

Page 39: ...he connection of PG motor control terminal is firm Turn on the unit again measure whether the output voltage on control terminal for PG motor is more than 50V within 1 min after the louvers are opened...

Page 40: ...the mainboard is defined abnormal Malfunction diagnosis process Start Is there jumper cap on the mainboard Is the jumper cap inserted correctly and tightly Replace the jumper cap with the same model...

Page 41: ...harges slowly The zero cross detectioncircuit of the mainboard is defined abnormal Malfunction diagnosis process Turn power off for 1minute the turn back on The unit returns to normal Conclusion U8 is...

Page 42: ...the compressor Replace the mainboard with the same model End Is the supply voltage too low with overload Is the indoor outdoor heat exchanger dirty or are the air inlet and outlet blocked The fan is a...

Page 43: ...ambient temperature is higher than 53 C If the airflow of indoor and outdoor unit is good If the indoor and outdoor fan are running normally Replace outdoor mainboard Connect normally Adjust the conn...

Page 44: ...Malfunction is eliminated Malfunction is eliminated Malfunction is eliminated Malfunction is eliminated Check motor and re install the motor to make it run normally Make compressor run normally Remov...

Page 45: ...for details Malfunction of compressor Compressor can t operate Refer to point 5 of maintenance method for details 9 3 Maintenance Method for Normal Malfunction 1 Air Conditioner Can t be Started Up 2...

Page 46: ...n pipe Replace drain pipe Wrapping is not tight Water leaking from the pipe connection place of indoor unit Wrap it again and bundle it tightly 5 Compressor Can t Operate Possible causes Discriminatin...

Page 47: ...llation and Maintenance Service Manual 10 Exploded View and Parts List 10 1 Indoor Unit 14 24 25 26 30 27 28 29 1 2 3 4 5 6 16 8 9 10 11 31 12 13 15 7 17 18 19 21 22 23 20 LM009CI 100T432 1 LM012CI 10...

Page 48: ...09501 01002976 1 12 Wall Mounting Frame 01252043 01252484 1 13 Cross Flow Fan 10352059 10352056 1 14 Fan Motor 150120874 1501214603 1 15 Connecting pipe clamp 2611216401 2611216401 1 16 Rubber Plug Wa...

Page 49: ...46 Installation and Maintenance Service Manual LM018CI 100T432 1 1 2 3 4 5 6 34 35 36 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 33 32 31 40 39 38 37...

Page 50: ...Ring of Bearing 26152025 1 16 Evaporator Support 24212177 1 17 Evaporator Assy 01002686 1 18 Cross Flow Fan 10352060 1 19 Fan Motor 1501214502 1 20 Motor Press Plate 26112511 1 21 Wall Mounting Frame...

Page 51: ...48 Installation and Maintenance Service Manual LM024CI 100T432 1...

Page 52: ...8 1 14 Evaporator Assy 01002988 1 15 Cold Plasma Generator 1114001602 1 16 Wall Mounting Frame 01252229 1 17 Motor Press Plate 26112515 1 18 Fan Motor 15012145 1 19 Connecting pipe clamp 26112514 1 20...

Page 53: ...50 Installation and Maintenance Service Manual 10 2 Outdoor Unit LM009CO 100T432 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25...

Page 54: ...0600293 1 9 Valve 07100003 1 10 Valve 07100005 1 11 Big Handle 262334332 1 12 Valve Support 0170308901P 1 13 Right Side Plate Sub Assy 01303183 1 14 Electric Box Assy 10000201510 1 15 Terminal Board 4...

Page 55: ...52 Installation and Maintenance Service Manual 11 10 9 8 7 3 2 1 12 13 14 15 16 17 18 19 20 21 22 23 24 25 4 5 6 LM012CO 100T432 1...

Page 56: ...456 1 9 Capillary Sub assy 03000600288 1 10 Valve 07100003 1 11 Valve 07100006 1 12 Big Handle 262334332 1 13 Valve Support 01713041 1 14 Right Side Plate Assy 0130200404 1 15 Terminal Board 42011154...

Page 57: ...54 Installation and Maintenance Service Manual LM018CO 100T432 1 1 2 3 4 5 7 8 11 10 12 13 16 17 18 19 22 23 21 24 26 25 20 15 14 9 6...

Page 58: ...alve Support Sub Assy 01715006 1 9 Cut off Valve 071302392 1 10 Cut off Valve 07130239 1 11 Valve Cover 22243003 1 12 Discharge Tube 03500800135 1 13 Handle 2623525404 1 14 Right Side Plate 01305095P...

Page 59: ...56 Installation and Maintenance Service Manual LM024CO 100T432 1 1 1 27 26 25 2 7 13 14 15 22 23 24 21 20 19 18 17 9 6 5 4 3 8 1 11 10 12 16...

Page 60: ...B61 3301074705 1 11 Capacitor CBB65 3300008107 1 12 Electric Box Assy 10000201642 1 13 Terminal Board 42011113 1 14 Handle 26233053 1 15 Cut off Valve 07133157 1 16 Valve Cover 22245002 1 17 Cut off V...

Page 61: ...ation of step motor Procedure Step 1 Remove filter assembly 2 Remove horizontal louver Front panel Front case Right filter Groove Left filter Open the front panel Push the left filter and right filter...

Page 62: ...e sub assy is different for different models Loosen the connection clasps between vertical louver and bottom case to remove vertical louver Loosen the connection clasps between front case sub assy and...

Page 63: ...t off the screws that are locking lead wire and rotate the electric box assy Twist off the screws that are locking wire clip Loosen the power cord and remove its wiring terminal Lift up the main board...

Page 64: ...erminals 2 Pull out the holder for some terminals at first holder is not available for some wiring terminal hold the connector and then pull the terminal Circlip Soft sheath Holder Connector Procedure...

Page 65: ...he screws at the connection place of cross flow blade and motor lift the motor and cross flow blade upwards to remove them Remove the bearing holder sub assy Remove the screw fixing step motor and the...

Page 66: ...e the leftand right filters one by one Push out the axile bush on horizontal louver Bend the horizontal louver with hand and then separate the horizontal louver from the crank shaft of step motor to r...

Page 67: ...ce Service Manual Loosen the connection clasps between front case sub assy and bottom case Lift up the front case sub assy and take it out S wing motor Screw off the screws that are locking the swing...

Page 68: ...the indoor tube temperature sensor Screw off one grounding screw Remove the wiring terminals of motor and stepping motor Remove the electric box assy Screw off the screws that are locking each lead w...

Page 69: ...lation and Maintenance Service Manual R ear case assy First remove the left side of evaporator from the groove on the rear case assy Then remove the right side from the clasp on the rear case assy Gro...

Page 70: ...67 Installation and Maintenance Service Manual...

Page 71: ...1 1 Before disassembly 2 Remove big handle Remove the connection screw fixing the big handle and then remove the handle 3 Remove top panel Remove connection screws connecting the top panel with the f...

Page 72: ...the chassis and the motor support and then remove the front panel Remove connection screws connecting the right side plate with the chassis the valve support and the electric box Then remove the righ...

Page 73: ...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 10 Rem...

Page 74: ...as 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...

Page 75: ...fore disassembly 3 Remove top cover 2 Remove big handle top cover big handle Remove the connection screw fixing the big handle and then remove the handle Remove connection screws connecting the top co...

Page 76: ...n screws between the front grille and the front panel Then remove the front grille Remove connection screws connecting the front panel with the chassis and the motor support and then remove the front...

Page 77: ...e tapping screws fixing the motor and disconnect the leading wire insert of the motor Then remove the motor Remove tapping screws fixing the motor and lift the motor support to remove it Remove screws...

Page 78: ...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 te...

Page 79: ...e disassembly Remove the screw fixing the handle and then remove the handle Remove screws connecting the top panel with the front panel and the right side plate and then remove the top panel 2 Remove...

Page 80: ...ng the rear guard grille and then remove the rear guard grille remove the screws connecting the front panel with the chassis and the motor support and then remove the front panel Remove the screws con...

Page 81: ...nect the leading wire insert of the motor and then remove the motor Remove the tapping screws fixing the motor support and then pull the motor support upwards to remove it Remove screws fixing the ele...

Page 82: ...etely to avoid damage to the valve caused by high temperature Remove the screws fixing the liquid valve unsolder the welding joint between the liquid valve and Y type tube to remove the liquid valve U...

Page 83: ...Remove screws fixing the isolation sheet and then remove the isolation sheet Remove screws fixing valve support and then remove the valve support remove the screw fixing the condenser and then pull th...

Page 84: ...op panel grille b a Before disassembly Remove the screws connecting the top panel with the front panel and the right side plate and then remove the top panel Remove the screws fixing the valve cover a...

Page 85: ...then remove the panel Remove the screws connecting the right side plate with the chassis the valve support and the electric box and then remove the right side plate Remove the screws connecting the le...

Page 86: ...e 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 remove it Remove screw...

Page 87: ...ry the valve and the outlet pipe of condenser to remove the capillary Do not block the capillary with welding slag during unsoldering Remove the 2 screws fixing the gas valve unsolder the soldering jo...

Page 88: ...Remove the screws fixing the isolation sheet and then remove the isolation sheet b Remove screws connecting the support condenser and the condenser assy and then remove the support condenser c Dissem...

Page 89: ...32 0 55 56 55 4 13 79 80 78 8 26 34 35 33 8 1 57 58 57 2 14 81 80 6 27 36 35 6 2 59 60 59 15 82 83 82 4 28 37 38 37 4 3 61 62 60 8 16 84 85 84 2 29 39 40 39 2 4 63 62 6 17 86 87 86 30 41 42 41 5 64 65...

Page 90: ...llowing steps A Cut the pip Confirm the pipe length according to the distance of indoor unit and outdoor unit Cut the required pipe with pipe cutter B Remove the burrs Remove the burrs with shaper and...

Page 91: ...66 88 33 10 63 72 2 439 111 0 737 5 63 46 34 10 2 73 2 358 112 0 717 4 60 23 35 9 779 74 2 28 113 0 697 3 57 18 36 9 382 75 2 206 114 0 678 2 54 31 37 9 003 76 2 133 115 0 66 1 51 59 38 8 642 77 2 06...

Page 92: ...983 5 84 61 34 13 59 73 3 144 112 0 956 4 80 31 35 13 04 74 3 04 113 0 93 3 76 24 36 12 51 75 2 94 114 0 904 2 72 41 37 12 76 2 844 115 0 88 1 68 79 38 11 52 77 2 752 116 0 856 0 65 37 39 11 06 78 2 6...

Page 93: ...62 11 32 101 3 22 15 362 9 24 51 41 63 10 93 102 3 13 14 342 8 25 49 19 64 10 54 103 3 04 13 323 9 26 47 08 65 10 18 104 2 96 12 306 2 27 45 07 66 9 83 105 2 87 11 289 6 28 43 16 67 9 49 106 2 79 10 2...

Page 94: ...Visit us at www lennox com or contact us at 1 877 726 0024 by Lennox Industries Inc please visit www lennox com 2014 Lennox Industries Inc For a complete list of the registered and common law tradema...

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