Lennox LNWR21X Service Manual Download Page 2

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Service Manual

Table of Contents

Table of Contents

Part

Ⅰ

:Technical Information

................................................................ 1

1.Summary

......................................................................................................... 1

2.Specifications

.............................................................................................. 2

3.Outline Dimension Diagram

............................................................... 10

4.Refrigerant System Diagram

............................................................. 11

5.Electrical Part

............................................................................................. 12

5.1 Wiring Diagram ............................................................................................ 12

5.2 PCB Printed Diagram ................................................................................... 14

6.Function and Control

............................................................................. 16

6.1 Introduction of Control Panel ........................................................................ 16

6.2 Introduction of Remote Controller ................................................................ 17

6.3 Function Introduction .................................................................................... 20

Part

Ⅱ

:Installation and Maintenance

............................................... 24

7.Notes for Installation and Maintenance

....................................... 24

8.Installation

................................................................................................... 25

8.1 Selection of Installation Location.................................................................. 25

8.2 Requirements for Electric Connection .......................................................... 25

8.3 Installation Procedure .................................................................................. 26

8.4 Installation of Accessories ............................................................................ 26

8.5 Drain Water .................................................................................................. 26

9.Maintenance

................................................................................................ 27

9.1 Error Code .................................................................................................... 27

9.2 Malfunction of Temperature Sensor ............................................................. 28

9.3 Maintenance Method for Normal Malfunction .............................................. 29

10.Exploded View and Parts List

......................................................... 32

11.Removal Procedure

.............................................................................. 41

Appendix:

......................................................................................................... 47

Appendix 1: Reference Sheet of Celsius and Fahrenheit .................................. 47

Appendix 2: List of Resistance for Ambient Temperature Sensor ...................... 48

Summary of Contents for LNWR21X

Page 1: ...Service Manual LNWR21X LNWR39X LNWR53X LNWR59X Refrigerant R410A MODELS...

Page 2: ...Installation and Maintenance 24 7 Notes for Installation and Maintenance 24 8 Installation 25 8 1 Selection of Installation Location 25 8 2 Requirements for Electric Connection 25 8 3 Installation Pr...

Page 3: ...Technical Information 1 1 Summary Part Technical Information Models LNWR21X LNWR39X LNWR53X LNWR59X YX1F Remote Controller ON OFF MODE FAN SWING SLEEP TIMER AUTO COOL DRY FAN HEAT T ON T OFF SWING SL...

Page 4: ...Operating Pressure for the Discharge Side MPa 4 3 Permissible Excessive Operating Pressure for the Suction Side MPa 2 5 Dimension WXHXD mm 560X375X668 Dimension of Carton Box LXWXH mm 763X620X410 Dim...

Page 5: ...ad Protector Internal Throttling Method Capillary Operation Temp C 16 30 Ambient Temp Cooling C 18 43 Ambient Temp Heating C 7 30 Condenser Form Aluminum Fin copper Tube Pipe Diameter mm 7 Rows fin Ga...

Page 6: ...e Operating Pressure for the Discharge Side MPa 4 3 Permissible Excessive Operating Pressure for the Suction Side MPa 2 5 Dimension WXHXD mm 660X428X700 Dimension of Carton Box LXWXH mm 790X736X490 Di...

Page 7: ...ooling C 18 43 Ambient Temp Heating C 7 30 Condenser Form Aluminum Fin copper Tube Pipe Diameter mm 7 Rows fin Gap mm 3 1 4 Coil Length LXDXW mm 691X38 1X400 Fan Motor Speed H M L rpm 840 780 730 Outp...

Page 8: ...e Excessive Operating Pressure for the Suction Side MPa 2 5 Dimension WXHXD mm 660X428X770 Dimension of Carton Box LXWXH mm 736X860X500 Dimension of Package LXWXH mm 739X863X515 Net Weight kg 68 0 Gro...

Page 9: ...18 43 Heating Operation Ambient Temperature Range C 7 30 Condenser Form Aluminum Fin copper Tube Condenser Pipe Diameter mm 7 Condenser Rows fin Gap mm 3 1 4 Condenser Coil Length LXDXW mm 885X38 1X40...

Page 10: ...e Excessive Operating Pressure for the Suction Side MPa 2 5 Dimension WXHXD mm 660X428X770 Dimension of Carton Box LXWXH mm 736X860X500 Dimension of Package LXWXH mm 739X863X515 Net Weight kg 70 0 Gro...

Page 11: ...18 43 Heating Operation Ambient Temperature Range C 7 30 Condenser Form Aluminum Fin copper Tube Condenser Pipe Diameter mm 7 Condenser Rows fin Gap mm 3 1 4 Condenser Coil Length LXDXW mm 935X38 1X40...

Page 12: ...ce Manual Technical Information 10 3 Outline Dimension Diagram Unit mm Model W mm H mm D mm LNWR21X 560 375 668 LNWR39X 660 420 700 LNWR53X 660 420 770 LNWR59X 660 420 770 Over 500 W D H Over 150 Over...

Page 13: ...mation 11 4 Refrigerant System Diagram OUTDOOR COILS HOT DISCHARGED AIR COOLED AIR COMPRESSOR AXIAL FAN CENTRIFUGAL OR CROSS FAN CAPILLARY REFRIGERANT FLOW DIRECTION NOTES COOLING MODE HEATING MODE HO...

Page 14: ...5 Electrical Part 5 1 Wiring Diagram Symbol Symbol Color Symbol Symbol Color Symbol Name YE Yellow BN Brown COMP Compressor RD Red BU Blue Grounding wire YEGN Yellow Green BK Black CAP Capacitor Elect...

Page 15: ...YEGN GN BU WH BN BK COMP ROOM OUTTUBE AP1 1 4 5 6 RECEIVER AND DISPLAY BOARD CN3 CN1 L N POWER MODULE CN5 CN6 W2YE CAP C1 J W4BU CN2 SWING MOTOR RD W3BU W5BU 5 M1 COMP RELAY KM CN30 AP3 CN31 M2 LNWR5...

Page 16: ...5 6 7 8 9 10 11 12 13 14 15 1 Input of live wire 2 fuse 3 12V power input 4 buzzer 5 Interface of display board 6 Tube temperature sensor 7 Ambient t e m p e r a t u r e sensor 8 Outdoor tube tempera...

Page 17: ...13 Medium fan speed indicator 19 Filter cleaning button 2 decreasing button 8 Cooling indicator 14 Swing button 20 Filter cleaning indicator 3 Timer indicator 9 ON OFF button 15 High fan speed indica...

Page 18: ...pressing this button again 2 FAN SPEED BUTTON Select the fan speed HIGH MID LOW and AUTO in sequence 3 Press the keypad also to increase the selected time in 1 hour increments and Press the keypad to...

Page 19: ...Note When power is connected stand by condition you can operate the air conditioner through the remote controller When unit is on each time you press the button on remote controller the sending signa...

Page 20: ...this button to set Timer Off T OFF and H icon will be blinking Within 5s press or button to adjust the time for Timer Off Pressing or button once will increase or decrease the time by 0 5h or 1h Hold...

Page 21: ...t The distance between signal sender and receiving window should be within 8m There should be no obstacle between them Signal may be interfered easily in the room where there is fluorescent lamp or wi...

Page 22: ...will operate at low speed Under this mode the setting temperature range is 16 30 61 86 1 3 Energy saving mode 1 3 1 Drying condition and process a When Tindoor amb Tpreset 1 2 the compressor will be t...

Page 23: ...t sound 2 3 Sleep function a In Cool Energy saving or Dry mode 1 hour after setting Sleep function Tpreset will increase 1 2 2hours later Tpreset will not increase 2 4 totally Then the setting tempera...

Page 24: ...of cooling will be on b When the unit is operating in fan mode LED lamp of fan mode will be on and dual 8 nixie tube will display ambient temperature The temperature can t be adjusted c When the unit...

Page 25: ...tection When the unit operates at cooling mode if freeze protection is detected the compressor will stop operation and indoor fan will operate at set speed When freeze protection is removed the unit w...

Page 26: ...alized power cord from the manufacture or distribu tor Prohibit prolong the wire by yourself 10 Make sure all wires and pipes are connected prop erly Warnings Electrical Safety Precautions 1 Avoid con...

Page 27: ...t lamp 1 Safety precaution 1 Must follow the electric safety regulations when installing the unit 2 According to the local safety regulations use qualified power supply circuit and air switch 3 Make s...

Page 28: ...e unit to direct sunlight contact your seller to install a sunshade baffle for the unit When installing make sure the air inlet at the side grille will not be blocked To maximize cooling efficiency th...

Page 29: ...ontroller 3 indoor tube temperature sensor is damaged Please check it by referring to the resistance table for temperature sensor 4 Main board is broken Refer to maintenance flowchart 3 Malfunction of...

Page 30: ...y contacted Insert the temperature sensor tightly yes Is malfunction eliminated Is there short circuit due to trip over of the parts Make the parts upright yes Is malfunction eliminated Replace the ma...

Page 31: ...ne Adjust the set temperature Rotation speed is set too low Small wind blow Set the fan speed at high or medium Filter is blocked Check the filter to see it s blocked Clean the filter Installation pos...

Page 32: ...e same model Capacitor of compressor is damaged 1 Discharge the capacitor at first and then use universal meter to measure the resistance of fan capacitor It displays 0 or very small 2 If the resistan...

Page 33: ...the unit There s abnormal sound fro the unit Remove foreign objects Adjust all parts position of unit tighten screws and stick damping plaster between connected parts Abnormal shake of compressor Out...

Page 34: ...ual Installation and Maintenance 32 10 Exploded View and Parts List LNWR21X 21 22 8 19 18 17 25 29 24 23 11 20 16 7 6 4 3 5 9 2 26 13 10 12 14 15 49 32 31 37 38 40 41 42 36 35 34 33 30 27 28 39 47 46...

Page 35: ...ngs 00101292 1 21 Compressor Gasket 76710287 3 22 Capillary Sub Assy 03001777 1 23 4 Way Valve Assy 03021225 1 24 Water Tray 12411006 1 25 Chassis Sub assy 0120110504P 1 26 Drainage Box 20181125 1 27...

Page 36: ...Service Manual Installation and Maintenance 34 LNWR39X 32 22 25 26 24 10 21 7 6 4 3 5 9 2 28 29 23 8 27 30 14 50 48 46 45 47 41 49 38 43 40 37 33 36 35 31 51 42 39 34 44 12 11 18 16 13 15 17...

Page 37: ...Compressor and fittings 00101302 1 23 Compressor Gasket 76711043 3 24 Capillary Sub Assy 03001970 1 25 4 Way Valve Assy 03021110 1 26 Magnet Coil 430004017 1 27 Water Tray 12411007 1 28 Chassis Sub a...

Page 38: ...Service Manual Installation and Maintenance 36 LNWR53X 18 14 16 13 12 19 17 32 8 36 37 34 38 41 44 39 45 35 40 43 52 15 42 51 49 47 46 48 50 33 23 26 4 3 5 10 2 1 29 30 7 6 24 9 28 31 27 25 11 22...

Page 39: ...001292 1 23 Compressor and fittings 00101300 1 24 Compressor Gasket 76812805 3 25 Capillary Sub Assy 03001495 1 26 4 Way Valve Assy 03021227 1 27 Magnet Coil 430004017 1 28 Water Tray 12411007 1 29 Ch...

Page 40: ...ice Manual Installation and Maintenance 38 LNWR59X 50 40 45 48 57 23 19 21 18 17 24 22 37 8 41 42 39 43 46 49 44 47 55 9 10 11 12 13 20 53 51 52 54 56 5 15 2 34 35 38 28 31 4 3 33 36 32 30 16 27 7 6 2...

Page 41: ...Air Door Lever 10581601 1 19 Swing lever 10581602 1 20 Swing Lever2 10581021 1 21 Step Motor 1521211601 1 22 Swing blade Support 10581603 1 23 Crank 73011001 1 24 Air Louver 10511601 2 25 Centrifugal...

Page 42: ...1 49 LCD board remote control 20120037 1 50 Membrane 2243113201 1 51 Front Panel Assy 20001541_K79014 1 52 Guide blade lever 10581604 1 53 Guide blade 105116021 14 54 Front Case 27220105253 1 55 Filte...

Page 43: ...the clasp fixing chassis remove the screws fixing the rear part of cabinet and then pull out the unit Open t he air inlet panel remove the filter remove the screws in the middle at the left side and r...

Page 44: ...lation and Maintenance 42 Steps Procedure 3 Remove electric box Remove remote control plate earthing screw and temp sensor in turn Then remove electric box screws temp sensor screws earthing screw tem...

Page 45: ...door lever 4 Remove top cover Remove the screws fixing top cover and then remove the top cover Take out the cross beam take out the swing louver remove the screws fixing air door lever and then remov...

Page 46: ...cting pipe Note discharge refrigerant firstly and then remove screws fixing evaporator Then remove evaporator 7 Remove condenser Unsolder each connecting pipe Note discharge refrigerant firstly Remove...

Page 47: ...Remove 4 way valve assembly Remove nut fixing axial flow fan blade and the washer Then remove axial flow fan blade Remove nut fixing centrifugal fan blade and then remove centrifugal fan blade Unsolde...

Page 48: ...move compressor Remove screws of motor support and then remove motor support Remove screws of motor and then remove the motor Unsolder each connecting pipe Note discharge refrigerant firstly and then...

Page 49: ...33 46 47 46 4 8 70 71 69 8 21 93 94 93 2 34 48 49 48 2 9 72 71 6 22 95 96 95 35 50 51 50 10 73 74 73 4 23 97 98 96 8 36 52 53 51 8 11 75 76 75 2 24 99 98 6 37 54 53 6 12 77 78 77 25 Appendix Appendix...

Page 50: ...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 2 064 116 0 642 0 4...

Page 51: ...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 2 663 117 0 833 1...

Page 52: ...1 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 10 274 29 41 34...

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