Lennox Y6334 Service Manual Download Page 75

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Installation and Maintenance

Service Manual

Procedure

Step

Remove the screws on the electric box
cover 2 to remove the electric box cover 2.

Remove the screws fixing front case.

Note:

1.Open the screw caps before removing
the screws around the air outlet.
2.The quantity of screws fixing the front
case 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 bottom case. Lift
up the front case sub-assy and take it out.

Electric box cover 2

Screw

4. Remove electric box cover 2

5. Remove front case sub-assy

6. Remove vertical louver

Front case
sub-assy

Front case

sub-assy

Clasp

Screw caps

Screws

Screw

Vertical

louver

Vertical

louver

Clasps

Bottom

case

Summary of Contents for Y6334

Page 1: ...u for selecting LENNOX air conditioners Service Manual Models LI009HI 160T432 LI009HO 160T432 LI012HI 160T432 LI012HO 160T432 LI018HI 160T432 LI018HO 160T432 LI024HI 160T432 LI024HO 160T432 Refrigeran...

Page 2: ...10 5 Electrical Part 11 5 1 Wiring Diagram 11 5 2 PCB Printed Diagram 14 6 Function and Control 18 6 1 Remote Controller Introduction 18 6 2 Brief Description of Modes and Functions 22 Part Installati...

Page 3: ...ded View and Parts List 63 10 1 Indoor Unit 63 10 2 Outdoor Unit 67 11 Removal Procedure 71 11 1 Removal Procedure of Indoor Unit 71 11 2 Removal Procedure of Outdoor Unit 81 Appendix 94 Appendix 1 Re...

Page 4: ...ion Service Manual 1 Summary Part Technical Information Indoor Unit LI009HI 160T432 LI012HI 160T432 LI018HI 160T432 LI024HI 160T432 Outdoor Unit LI018HO 160T432 LI024HO 160T432 LI009HO 160T432 LI012HO...

Page 5: ...cation Area m2 12 18 16 24 Indoor Unit Indoor Unit Model LI009HI 160T432 LI012HI 160T432 Indoor Unit Product Code Y6732 Y6734 Fan Type Cross flow Cross flow Fan Diameter Length DXL mm 98X580 98X633 5...

Page 6: ...denser Coil Length LXDXW mm 710X19 05X508 710X38 1X506 Fan Motor Speed rpm 900 900 Fan Motor Power Output W 30 30 Fan Motor RLA A 0 36 0 36 Fan Motor Capacitor F Outdoor Unit Air Flow Volume m3 h 1600...

Page 7: ...34 23 34 Indoor Unit Indoor Unit Model LI018HI 160T432 LI024HI 160T432 Indoor Unit Product Code Y6736 Y6738 Fan Type Cross flow Cross flow Fan Diameter Length DXL mm 106X706 108X830 Cooling Speed SH H...

Page 8: ...m 750 800 300 Fan Motor Power Output W 60 60 Fan Motor RLA A Fan Motor Capacitor F Outdoor Unit Air Flow Volume m3 h 3200 3200 Fan Type Axial flow Axial flow Fan Diameter mm 520 520 Defrosting Method...

Page 9: ...acity ratio 30 40 50 60 70 80 90 100 110 120 10 7 5 0 5 10 15 20 Outdoor temp o C Capacity ratio Conditions Indoor DB20 C WB15 C Indoor air flow Super High Pipe length 5m Cooling Heating 2 4 Cooling a...

Page 10: ...0 90 Noise dB A LI018HO 160T432 LI024HO 160T432 LI024HI 160T432 LI018HI 160T432 Indoor side noise when blowing Outdoor side noise when blowing Indoor fan motor rotating speed Compressor frequency Hz N...

Page 11: ...9 5 55 55 54 123 5 542 179 5 83 2 124 7 35 55 55 35 104 685 181 140 190 38 55 55 38 79 154 43 206 685 187 70 70 43 Unit mm Model W H D LI009HI 160T432 790 275 200 LI012HI 160T432 845 289 209 LI018HI 1...

Page 12: ...9 Technical Information Service Manual 963 892 700 396 560 341 396 3 2 Outdoor Unit Unit mm Unit mm LI009HO 160T432 LI012HO 160T432 LI018HO 160T432 LI024HO 160T432 776 257 320 712 510 540 286...

Page 13: ...or unit COOLING HEATING 4 Way valve Discharge Suction Heat exchanger evaporator Heat exchanger condenser Valve Valve Liquid pipe side Gas pipe side Strainer Electric expand valve Strainer Capillary Co...

Page 14: ...mpressor RD Red BU Blue Grounding wire YEGN Yellow Green BK Black VT Violet OG Orange Note Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model 7 6 1625 7 0...

Page 15: ...RU KDV EHHQ SRZHUHG RII IRU OHVV WKDQ PLQXWHV WR SUHYHQW WKH ULVN 51 1 8 5 1 225 81 7 127 0RWRU DSSOLHV WR WKH LURQ VKHOO PRWRU JURXQG RQO 02725 RI HOHFWULF VKRFN 3OHDVH GRQ W WRXFK DQ WHUPLQDO ZKHQ W...

Page 16: ...03 6 1625 28778 2875220 7 03 6 1625 867 7 03 6 1625 3 These circuit diagrams are subject to change without notice please refer to the one supplied with the unit Please don t touch any electronic compo...

Page 17: ...wire interface of power supply 3 Interface of PG motor 4 Live wire interface of cold plasma Only for the model with this function 5 Interface of up down swing motor 6 Interface of indoor fan feedback...

Page 18: ...m view No Name 1 Compressor 2 Reactor 2 3 Reactor 1 4 Chassis electric heating 5 Compressor electric heating 6 4 way valve 7 DC fan 8 Earthing wire 9 Communication wire 10 Neutral wire 11 Live wire 12...

Page 19: ...temperature sensor 3 Terminal of electronic expansion valve 4 Terminal of outdoor fan 5 Terminal of 4 way valve 6 Terminal of compressorelectric heating 7 Terminal of chassis electric heating 8 Termin...

Page 20: ...ad protection 6 Terminal of electronic expansion valve 7 Terminal of outdoor fan 8 Terminal of compressor electric heating 9 Terminal of 4 way valve 10 Terminal of compressor wire 11 Terminal of chass...

Page 21: ...t mode Fan mode Dry mode Cool mode Auto mode Operation mode I feel Note After putting through the power the air conditioner will give out a sound Operation indictor is ON red indicator After that you...

Page 22: ...indoor ambient temperature Set temperature range from remote controller 16 30 Fan speed auto low speed medium speed high speed 5 TURBO button Under COOL or HEAT mode press this button to turn to quick...

Page 23: ...word ON will stop blinking icon resumes displaying Cancel TIMER ON Under the condition that TIMER ON is started up press TIMER ON button to cancel it TIMER OFF button TIMER OFF button can set the time...

Page 24: ...adjusted Under energy saving function set temperature can t be adjusted Press TURBO button and the remote controller won t send signal Sleep function and energy saving function can t operate at the sa...

Page 25: ...value under each condition Ambient temperature is Tamb Tcompensation for heat pump unit and Tamb for cooling only unit 4 If there s I feel function Tcompensation is 0 Others are same as above 5 Fan m...

Page 26: ...still in standby mode after finishing refrigerant recycling if the unit is in ON status before refrigerant recycling it will still run in original operation mode 11 Ambient temperature display control...

Page 27: ...enters into heating mode Compressor outdoor fan and 4 way valve start operation When 2 Tpreset Tindoor ambient temperature Tcompensation 1 unit operates according to the previous status When Tpreset...

Page 28: ...mode Cold air prevention function is shielded If compressor is operating under this mode fan speed will adjust according to auto fan speed if compressor stops operation under this mode indoor fan will...

Page 29: ...operation 1 If the compressor is shut down and Tset up Tindoor ambient temperature Tcooling indoor ambient temperature compensation 0 5 C start up the machine for cooling the cooling operation will s...

Page 30: ...hed on 2 Defrosting a Defrosting starts the compressor is shut down and restarts it after 55 second delay b Defrosting ends the compressor stops then starts it after 55 second delay 2 Outer Fans Contr...

Page 31: ...it should not be started and should be stopped to treat according to the overload protection Clear the trouble at the mode of power turn off heating and the protection times are not counted 2 Frequenc...

Page 32: ...ure at normal speed during discharging you should limit the frequency raising of compressor 3 Reducing frequency at normal speed and stopping machine If Tfrequency reducing temperature at normal speed...

Page 33: ...compressor frequency by reducing 30Hz 90s till the lower limit After it was running 90s at the lower limit if T frequency reducing temperature at normal speed of module TModule you should stop the mac...

Page 34: ...egarded as four way valve reversion abnormity And then it can run if stop the reversion abnormity protection for four way valve 3 min and if it still can t run when the reversion abnormity protection...

Page 35: ...p operation 3 When 0 C Toutdoor amb 2 C the electric heating of chassis will keep original status 7 Electric Heating Function of Compressor 1 When Toutdoor amb 5 C compressor stops operation while the...

Page 36: ...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 37: ...ng 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 T...

Page 38: ...east 15cm At least 15cm At least 250cm Space to the wall S p a c e t o t h e o b s t r u c t i o n r o o l f e h t o t e c a p S Space to the obstruction Drainage pipe Space to the wall Space to the o...

Page 39: ...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 40: ...The air conditioner is first class electric appliance It must be properly grounding with specialized grounding device by a professional Please make sure it is always grounded effectively otherwise it...

Page 41: ...nsulating pipe Torque wrench Open end wrench Indoor pipe Pipe Union nut Union nut Pipe joint Pipe Hex nut diameter mm Tightening torque N m 6 15 20 9 52 30 40 12 45 55 16 60 65 19 70 75 Refer to the f...

Page 42: ...separate the indoor power and then separate the drain hose As show in Fig 15 3 Bind them evenly 4 The liquid pipe and gas pipe should be bound separately at the end 2 Make the power connection wire go...

Page 43: ...th bolts As show in Fig 20 4 Connect Indoor and Outdoor Pipes 1 Remove the screw on the handle and valve cover of outdoor unit and then remove the handle and valve cover As show in Fig 21 2 Remove the...

Page 44: ...charging vent of gas valve and then connect the other charging hose to the vacuum pump 3 Open the piezometer completely and operate for 10 15min to check if the pressure of piezometer remains in 0 1MP...

Page 45: ...ture sensor is open short circuited F1 Indoor evaporator temperature sensor is open short circuited F2 Module temperature sensor is open short circuited P7 Outdoor ambient temperature sensor is open s...

Page 46: ...then peformedischarging NOTE A large capacity electrolytic capacitor is used in the outdoor unit controller inverter Therefore if the power supply is turned off charge charging voltage DC280V to 380V...

Page 47: ...ard broken 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 Y...

Page 48: ...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 49: ...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 50: ...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 51: ...wiring diagram Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated Main board matches with display board Main board of IDU matches with that of ODU...

Page 52: ...on occurs after de energizing and turning on the unit Whether stop time for compressor is more than 3min No No No No No No No Yes Yes Yes Yes Yes No Yes Yes Yes Yes Whether valve of outdoor unit is op...

Page 53: ...uch as clean heat exchanger improve ventilation etc Turn on the unit again after the power voltage is resumed Charge refrigerant according to service manual Whether the outdoor fan can operate normall...

Page 54: ...function diagnosis process Start the troubleshooting for temperature sensor Check the connection between temperature sensor and wiring terminal is loose or in poor connection Check whether the tempera...

Page 55: ...der ambient temperature Whether the resistance 1K Whether wire connection wire electronic expansion valve is in good condition Check the coil of electronic expansion valve If it s damaged please repla...

Page 56: ...for 1 min There is malfunction for the detection circuit on main board of outdoor unit Check the input power and resume the power supply normal Is malfunction eliinated Measure the voltage at both en...

Page 57: ...an terminal is connected well Whether the fan is damaged Replace fan capacitor unavailable for DC fan Replace outdoor fan Whether outdoor ambient temperature is more than 53o C Whether radiation insid...

Page 58: ...mpressor wires are connected correctly Whether there re above circumstances Connect compressor wires according to correct wiring method Modify it according to Service Manual and then energize and turn...

Page 59: ...on of PFC Protection HC Main check point Whether power supply is normal Malfunction diagnosis process Start Check whether power supply is normal Is power abnormal Replace main board of outdoor unit En...

Page 60: ...of outdoor unit is damaged Malfunction diagnosis process Communication malfunction De energize the unit and then check whether connection wires between indoor unit and outdoor unit and wiring inside...

Page 61: ...stop time for compressor is more than 3min Whether compressor wires are connected correctly The stop time for unit is not enough high pressure and low pressure of system are unbalanced please wait fo...

Page 62: ...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...

Page 63: ...tection circuit malfunctions of phase current of compressor U1 Hardware of main board is damaged Please replace main board 4 DC busbar voltage is too high PH Input voltage is too high or unstable Hard...

Page 64: ...od for details Malfunction of compressor Compressor can t operate Refer to point 5 of maintenance method for details 9 3 Troubleshooting for Normal Malfunction 1 Air Conditioner Can t be Started Up 2...

Page 65: ...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 66: ...Installation and Maintenance Service Manual The component picture is only for reference please refer to the actual product 10 Exploded View and Parts List 10 1 Indoor Unit LI009HI 160T432 LI012HI 160T...

Page 67: ...r Assy 01002000044 0100297601 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...

Page 68: ...65 Installation and Maintenance Service Manual LI018HI 160T432 LI024HI 160T432 The component picture is only for reference please refer to the actual product...

Page 69: ...Generator 1114001602 1114001602 1 16 Wall Mounting Frame 01362026 01252229 1 17 Motor Press Plate 26112511 26112515 1 18 Fan Motor 1501214502 15012145 1 19 Connecting Pipe Clamp 2611218801 26112514 1...

Page 70: ...67 Installation and Maintenance Service Manual The component picture is only for reference please refer to the actual product 10 2 Outdoor Unit LI009HO 160T432 LI012HO 160T432...

Page 71: ...1308506 1 12 Top Cover Sub Assy 01253073 01253073 1 13 Motor Support 01703104 0170310401 1 14 Condenser Assy 01100200141 01100200142 1 15 Rear Grill 01473009 01473009 1 16 Electric Expand Valve Fittin...

Page 72: ...69 Installation and Maintenance Service Manual The component picture is only for reference please refer to the actual product LI018HO 160T432 LI024HO 160T432...

Page 73: ...509402P 0130509001P 1 13 Valve cover 22245002 22245002 1 14 Handle 26233053 26233053 1 15 Wiring Clamp 26115004 1 16 Rear Grill 01473043 01475020 1 17 Condenser Assy 01100200126 01103000090 1 18 React...

Page 74: ...n 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 unt...

Page 75: ...nt case 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 as...

Page 76: ...ounding screw Remove the wiring terminals of motor and stepping motor Remove the electric box assy Twist off the screws that are locking each lead wire and rotate the electric box assy Twist off the s...

Page 77: ...terminals 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 Procedu...

Page 78: ...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 79: ...ght 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 remove it Separat...

Page 80: ...ervice 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 moto...

Page 81: ...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 82: ...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 83: ...80 Installation and Maintenance Service Manual...

Page 84: ...big handle slide out the big handle upwards to make the clasp of big handle separate from the groove of right side plate and then remove the big handle Remove the screws fixing top panel and then rem...

Page 85: ...p Screws Screws Screws Screws Screw off the screws that are locking the front cover Then take it off Front cover 4 Remove the front cover 5 Remove axial flow blade Remove the nut fixing axial flow bla...

Page 86: ...Screws 1 Screws 2 Remove the screws 1 fixing protective grille and then remove the protective grille Remove the screws fixing electric box assy pull out each wiring terminal lift the electric box ass...

Page 87: ...ay valve assy Note When unsoldering the spot weld wrap the 4 way valve with wet cloth completely to avoid damaging the valve due to high temperature Remove the screws fixing motor and then remove the...

Page 88: ...xing the liquid valve then remove the liquid valve Screw off the screws that are locking the valve support Then remove it 11 Remove gas valve and liquid valve Liquid valve Gas valve Screws Screws Scre...

Page 89: ...ove 3 foot nuts on compressor and then remove the compressor Note Protect the ports of discharge pipe and suction pipe to avoid foreign objects to enter it Remove one screw fixing the condenser then r...

Page 90: ...the valve cover and right side plate and then remove the valve cover Remove the screws connecting the top cover with outer case right side plate and left side plate lift the top cover upwards to remo...

Page 91: ...side plate and then remove the outer case Remove the 3 screws connecting the grille with right side plate and left side plate and then remove the rear guard grille Remove the screws connecting the ri...

Page 92: ...grounding wire screw on the electric box assy and then remove the grounding wire See fig 1 a c b Disconnect the wiring terminals of reactor compressor high and low pressure switch compressor overload...

Page 93: ...upwards to remove it d e f g Push the electric box cover in the direction of arrow to make the clasp at the right side separate from the groove then pull it in the opposite direction to make the clasp...

Page 94: ...he 3 screws connecting the isolation plate and chassis and then remove the isolation plate Remove the 4 screws connecting the reactor and isolation plate and then remove the reactor reactor isolation...

Page 95: ...e welding joint wrap the gas valve with a wet cloth completely to avoid damage to the valve caused by high temperature bolts liquid valve gas valve 9 Remove 4 way valve assy Remove the 2 screws connec...

Page 96: ...12 Remove compressor Remove the 3 foot nuts fixing compressor and then lift the compressor upwards to remove the compressor and damping cushion Note Keep the ports of discharge pipe and suction pipe f...

Page 97: ...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 98: ...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 99: ...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 2 064 1...

Page 100: ...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 101: ...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 102: ...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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