Lennox LI012CI-160P432-1 Service Manual
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Lennox LI012CI-160P432-1 Service Manual

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Service Manual
Models: LI012CI-160P432-1 / LI012CO-160P432-1
LI012HI-160P432-1 / LI012HO-160P432-1
LI018CI-160P432-1 / LI018CO-160P432-1
LI018HI-160P432-1 / LI018HO-160P432-1
LI024CI-160P432-1 / LI024CO-160P432-1
LI024HI-160P432-1 / LI024HO-160P432-1
(Refrigerant
R410A)
:
Thank you for selecting LENNOX air conditioners.

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Summary of Contents for Lennox LI012CI-160P432-1

  • Page 1 Service Manual Models: LI012CI-160P432-1 / LI012CO-160P432-1 LI012HI-160P432-1 / LI012HO-160P432-1 LI018CI-160P432-1 / LI018CO-160P432-1 LI018HI-160P432-1 / LI018HO-160P432-1 LI024CI-160P432-1 / LI024CO-160P432-1 LI024HI-160P432-1 / LI024HO-160P432-1 (Refrigerant R410A) Thank you for selecting LENNOX air conditioners.

  • Page 2: Table Of Contents

    Service Manual Table of Contents Part Ⅰ : Technical Information ...............1 1. Summary ........................1 2. Specifications ......................3 2.1 Specification Sheet ......................3 2.2 Operation Characteristic Curve ..................9 2.3 Capacity Variation Ratio According to Temperature ............9 2.4 Cooling and Heating Data Sheet in Rated Frequency ...........10 2.5 Noise Curve ........................
  • Page 3 Service Manual 10. Exploded View and Parts List ..............76 10.1 Indoor Unit ........................76 10.2 Outdoor Unit .........................82 11. Removal Procedure ..................92 11.1 Removal Procedure of Indoor Unit ................92 11.2 Removal Procedure of Outdoor Unit ................102 Appendix: ........................118 Appendix 1: Reference Sheet of Celsius and Fahrenheit ..........118 Appendix 2: Configuration of Connection Pipe ..............

  • Page 4: Part Ⅰ : Technical Information

    Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit LI012CI-160P432-1 LI018CI-160P432-1 LI024CI-160P432-1 LI012HI-160P432-1 LI018HI-160P432-1 LI024HI-160P432-1 Outdoor Unit LI012CO-160P432-1 LI012HO-160P432-1 LI018CO-160P432-1 LI018HO-160P432-1 LI024CO-160P432-1 LI024HO-160P432-1 Technical Information...
  • Page 5 Service Manual Remote Controller YAA1FB Model List: Model Indoor model Outdoor model LI012CI-160P432-1 LI012CI-160P432-1 LI012CO-160P432-1 LI012CO-160P432-1 LI018CI-160P432-1 LI018CI-160P432-1 LI018CO-160P432-1 LI018CO-160P432-1 LI024CI-160P432-1 LI024CI-160P432-1 LI024CO-160P432-1 LI024CO-160P432-1 LI012HI-160P432-1 LI012HI-160P432-1 LI012HO-160P432-1 LI012HO-160P432-1 LI018HI-160P432-1 LI018HI-160P432-1 LI018HO-160P432-1 LI018HO-160P432-1 LI024HI-160P432-1 LI024HI-160P432-1 LI024HO-160P432-1 LI024HO-160P432-1 Technical Information...

  • Page 6: Specifications

    Service Manual 2. Specifications 2.1 Specification Sheet LI012CI-160P432-1 LI012HI-160P432-1 Model LI012CO-160P432-1 LI012HO-160P432-1 Rated Voltage 208/230 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Outdoor Cooling Capacity Btu/h 12000 12000 Heating Capacity Btu/h 13000 Cooling Power Input 1256 1297...
  • Page 7 Service Manual Model of Outdoor Unit LI012CO-160P432-1 LI012HO-160P432-1 Outdoor Unit Product Code 20Y04 20Y12 ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR Compressor Manufacturer/Trademark CO., LTD CO., LTD Compressor Model QXF-A102zE190B QXF-A102zE190B Compressor Oil FW68DA FW68DA Compressor Type Rotary Rotary Compressor L.R.A. Compressor RLA Compressor Power Input 1023...
  • Page 8 Service Manual LI018CI-160P432-1 LI018HI-160P432-1 Model LI018CO-160P432-1 LI018HO-160P432-1 Rated Voltage 208/230 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min~Max) Btu/h 17400(4100~18000) 17400(4094~20000) Heating Capacity(Min~Max) Btu/h 18000(4100~21000) Cooling Power Input(Min~Max) 1889(200~2300) 2040(200~2300) Heating Power Input(Min~Max) 1758(300~2400) Cooling Power Current Heating Power Current Rated Input 2300...
  • Page 9 Service Manual Model of Outdoor Unit LI018CO-160P432-1 LI018HO-160P432-1 Outdoor Unit Product Code 20Y06 20Y16 ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR Compressor Manufacturer/Trademark CO.,LTD CO.,LTD Compressor Model QXF-A108zH190AA QXA-B141zF030A Compressor Oil FW68DA or equivalent FW68DA or equivalent Compressor Type Rotary Rotary Compressor Locked Rotor Amp (L.R.A) 25.00 Compressor RLA...
  • Page 10 Service Manual LI024CI-160P432-1 LI024HI-160P432-1 Model LI024CO-160P432-1 LI024HO-160P432-1 Rated Voltage 208/230 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min~Max) Btu/h 22000 22000 Heating Capacity(Min~Max) Btu/h 24000 Cooling Power Input(Min~Max) 2010 1950 Heating Power Input(Min~Max) 2070 Cooling Power Current 8.50 8.50 Heating Power Current...
  • Page 11 Service Manual Model of Outdoor Unit LI024CO-160P432-1 LI024HO-160P432-1 Outdoor Unit Product Code 20Y08 20Y18 ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR Compressor Manufacturer/Trademark CO.,LTD CO.,LTD Compressor Model QXFS-B181zX030AA QXFS-B181zX030AA Compressor Oil FW68DA or equivalent FW68DA or equivalent Compressor Type Twin Rotary Twin Rotary Compressor Locked Rotor Amp (L.R.A) 25.00...

  • Page 12: Operation Characteristic Curve

    Service Manual 2.2 Operation Characteristic Curve Heating Cooling 220V 220V • Conditions Indoor : DB80˚F/WB66.9˚F Outdoor : DB95˚F Indoor air flow : High Pipe lengt : 24.6ft 230V 230V 240V • Conditions Indoor : DB70˚F/WB60˚F 240V Outdoor : DB19.94˚F/WB19.04˚F Indoor air flow : High Pipe lengt : 24.6ft Compressor frequency(Hz) Compressor frequency(Hz)

  • Page 13: Cooling And Heating Data Sheet In Rated Frequency

    Service Manual 2.4 Cooling and Heating Data Sheet in Rated Frequency Cooling: Pressure of gas pipe Inlet and outlet pipe Rated cooling Compressor connecting indoor and temperature of heat Fan speed of Fan speed of condition(°F) (DB/WB) Model revolution outdoor unit exchanger indoor unit outdoor unit...

  • Page 14: Noise Curve

    Service Manual 2.5 Noise Curve LI012CI-160P432-1/LI012CO-160P432-1 LI012HI-160P432-1/LI012HO-160P432-1 Indoor side noise when blowing Outdoor side noise when blowing Heating Cooling Super High Middle High Indoor fan motor rotating speed Compressor frequency(Hz) LI018CI-160P432-1/LI018CO-160P432-1 LI018HI-160P432-1/LI018HO-160P432-1 LI024CI-160P432-1/LI024CO-160P432-1 LI024HI-160P432-1/LI024HO-160P432-1 Indoor side noise Outdoor side noise...

  • Page 15: Outline Dimension Diagram

    Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit 4 11/16 21 5/16 7 1/4 LI012CI-160P432-1 LI012HI-160P432-1 Φ2 3/16 Φ2 3/16 1 3/8 1 3/8 3 5/16 7 3/16 LI018CI-160P432-1 LI018HI-160P432-1 Φ2 3/16 Φ2 3/16 1 1/2 7 1/2 5 1/2...

  • Page 16: Outdoor Unit

    Service Manual 3.2 Outdoor Unit LI012CO-160P432-1 LI012HO-160P432-1 10 1/8 30 9/16 12 5/8 Unit:inch LI018CO-160P432-1 32 3/16 14 7/8 35 3/8 21 2/3 Unit:inch Technical Information...
  • Page 17 Service Manual LI018HO-160P432-1 LI024CO-160P432-1 LI024HO-160P432-1 12 11/64 33 7/64 35 29/32 14 11/16 22 29/32 Unit:inch Technical Information...

  • Page 18: Refrigerant System Diagram

    Service Manual 4. Refrigerant System Diagram LI018CI-160P432-1/LI018CO-160P432-1 LI018HI-160P432-1/LI018HO-160P432-1 LI024CI-160P432-1/LI024CO-160P432-1 LI024HI-160P432-1/LI024HO-160P432-1 Cooling model Outdoor unit Indoor unit Gas pipe side Valve Di s charge Heat exchanger (evaporator) Suction Accumlator Compressor Heat exchanger Liquid pipe (condenser) side Valve Electron Capillary Strainer expansion valve Heating model Outdoor unit...
  • Page 19 Service Manual LI012CI-160P432-1/LI012CO-160P432-1 LI012HI-160P432-1/LI012HO-160P432-1 Cooling only models Outdoor unit Indoor unit Gas pipe side Valve Di s charge Heat exchanger (evaporator) Suction Accumlator Compressor Heat exchanger Liquid pipe (condenser) side Valve Capillary Strainer Cooling and heating models Outdoor unit Indoor unit...

  • Page 20: Electrical Part

    Compressor Blue Grounding wire YEGN Yellow/Green Black Violet Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. ● Indoor Unit LI012CI-160P432-1 LI018CI-160P432-1 LI024CI-160P432-1 LI012HI-160P432-1 LI018HI-160P432-1 LI024HI-160P432-1 600007000575 Technical Information...
  • Page 21 Service Manual ● Outdoor Unit LI012CO-160P432-1 60000706165502 LI012HO-160P432-1 60000706165503 Technical Information...
  • Page 22 Service Manual LI018CO-160P432-1 60000706184801 LI024CO-160P432-1 60000706255401 Technical Information...
  • Page 23 Service Manual LI018HO-160P432-1 LI024HO-160P432-1 60000706255402 The above data is subject to change without notice. Please refer to the nameplate of the unit. Technical Information...

  • Page 24: Pcb Printed Diagram

    Service Manual 5.2 PCB Printed Diagram Indoor Unit LI012CI-160P432-1 LI018CI-160P432-1 LI024CI-160P432-1 LI012HI-160P432-1 LI018HI-160P432-1 LI024HI-160P432-1 Top view Name Interface of health function neutral wire Neutral wire terminal Motor terminal Live wire terminal Auto button Up&down swing terminal Interface of Motor feedback Left&right swing terminal...
  • Page 25 Service Manual Outdoor Unit LI012CO-160P432-1 LI012HO-160P432-1 Top view Name 1 Interface of compressor wire 2 Reactor wiring terminal 2 3 Reactor wiring terminal 1 4 Terminal of chassis electric heater 4-way valve terminal Grounding wire 7 Neutral wire 8 Communication wire 9 Live wire 10 Terminal of electronic expansion valve 11 Interface of temperature sensor...
  • Page 26 Service Manual LI018CO-160P432-1 Top view Name Compressor three phase input interface Interface of system high pressure protection Compressor overload protection interface 4 Interface of temperature sensor Interface of electronic expansion valve Interface of system low pressure protection 7 Interface of fan 8 4-way valve interface 9 2-way valve interface Interface of electric heating for...
  • Page 27 Service Manual LI024CO-160P432-1 LI018HO-160P432-1 LI024HO-160P432-1 Top view Name Compressor three phase input interface Compressor overload protection interface Interface of temperature sensor Interface of electronic expansion valve 5 Interface of fan 6 4-way valve interface Interface of electric heating for compressor 8 Interface of live wire 9 Interface of netural wire 10 Interface of earthing wire...

  • Page 28: Function And Control

    Service Manual 6. Function and Control 6.1 Remote Controller Introduction Buttons on Remote Controller ON/OFF button - button + button MODE button H O U R ONOFF FAN button SWING button I FEEL button button SLEEP button TEMP button TIMER-ON but CLOCK button TIMER-OFF bu TURBO...
  • Page 29 Service Manual Press this button to turn on the unit. Press this button again to turn off the unit. 2. - Button Press this button to decrease set temperature. Holding it down above 2 seconds rapidly decreases set temperature. In AUTO mode, set temperature is not adjustable.
  • Page 30 Service Manual When selecting " " by remote controller or no display, temperature indicator on indoor unit displays set temperature. When selecting " " by remote controller, temperature indicator on indoor unit displays indoor ambient temperature. When selecting " " by remote controller, temperature indicator on indoor unit displays outdoor ambient temperature. Outdoor ambient temperature display may can’t be selected for some models.When indoor unit receives "...
  • Page 31 Service Manual If “H1” is displayed on the remote controller while it’s not operated by the professional person/after-sales person, it belongs to the misoperation. Please operate it as below to cancel it.Under the OFF status of remote controller, hold the “MODE” button and “X-FAN” buttons simultaneously for 5s to cancel “H1”...

  • Page 32: Brief Description Of Modes And Functions

    Service Manual 6.2 Brief Description of Modes and Functions Indoor Unit ● 1.Basic function of system (1)Cooling mode (1) Under this mode, fan and swing operates at setting status. Temperature setting range is 60.8~86.0 (2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status. (2)Drying mode (1) Under this mode, fan operates at low speed and swing operates at setting status.
  • Page 33 Service Manual (8)I feel control mode After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient temperature sent by remote controller. (9)Compulsory defrosting function (1) Start up compulsory defrosting function Under ON status, set heating mode with remote controller and adjust the temperature to 60.8 F.
  • Page 34 Service Manual generated by the plastic parts due to thermal expansion and contraction is normal. During the cleaning and disinfection process, the room temperature may increase slightly, please keep the room well ventilated. Tips: The automatic cleaning function can only be started under normal environmental conditions. If the indoor environment is easy to dust, it is recommended to clean it once a month.
  • Page 35 Service Manual Outdoor Units 1. Input Parameter Compensation and Calibration (1) Check the ambient temperature compensation function Indoor ambient temperature compensation function. a. In cooling mode, the indoor ambient temperature participating in computing control = (T – ⊿ T indoor ambient temperature cooling indoor ambient temperature compensation b.
  • Page 36 Service Manual 3. Special Functions Defrosting Control ① Conditions for starting defrosting After the time for defrosting is judged to be satisfied, if the temperature for defrosting is satisfied after detections for continuous 3minutes, the defrosting operation will start. ② Conditions of finishing defrosting The defrosting operation can exit when any of the conditions below is satisfied: ③...
  • Page 37 Service Manual 1. Starting estimation: After the compressor stopped working for 180s, if T > [T (the temperature of hysteresis is 35.6ºF )], inner pipe frozen-preventing frequency-limited temperature the machine is only allowed to start for operating, otherwise it should not be started, and should be stopped to treat according to the frozen- preventing protection: Clear the trouble under the mode of power turn-off / heating, and the protection times are not counted.
  • Page 38 Service Manual 1. Frequency limited If [T ]≤T <[T ] , you should limit the frequency raising of heating overload frequency-limited temperature inner pipe heating overload frequency reducing temperature at normal speed compressor. 2. Reducing frequency at normal speed and stopping machine: If T[ ]≤T <[T...
  • Page 39 Service Manual (6)Voltage sag protection After start the compressor, if the time of DC link Voltage sag [U ] is measured to be less than t Voltage sag protection time , Sagging protection voltage the machine should be stop at once, hand on the voltage sag trouble, reboot automatically after 30 minutes. (7)Communication fault When you have not received any correct signal from the inner machine in three minutes, the machine will stop for communication fault.
  • Page 40 Service Manual (12) Starting-up Failure Protection for Compressor Stop the compressor after its starting-up fails, restart it after 20s if the fault doesnt shows, and if they are all failing for the successive start 3 times, it shall be reported as Starting-up Failure, and then restart up it after 3 min. When it still not be able to operate through carry out the above process for 5 times, it is available if press ON/OFF.
  • Page 41 Service Manual 6. Electric Heating Function of Chassis (1) When Toutdoor amb.≤32ºF , the electric heating of chassis will operate; (2) When Toutdoor amb.>35.6ºF , the electric heating of chassis will stop operation; (3)When 32ºF <Toutdoor amb.≤35.6ºF, the electric heating of chassis will keep original status. 7.

  • Page 42: Part Ⅱ : Installation And Maintenance

    Service Manual Part Ⅱ : Installation and Maintenance 7. Notes for Installation and Maintenance Safety Precautions: 10. If the power cord or connection wire is not long enough, please get the specialized power cord or connection wire Important! from the manufacture or distributor. Prohibit prolong the wire by yourself.
  • Page 43 Service Manual Safety Precautions for Installing and Relocating the Unit: To ensure safety, please be mindful of the following precautions. Warnings 1. When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant.
  • Page 44 Service Manual Main Tools for Installation and Maintenance 1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill 4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner hexagon spanner 7. Electronic leakage detector 8.

  • Page 45: Installation

    Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall Space to the wall At least 5 7/8 inch At least 5 7/8 inch Drainage pipe Installation and Maintenance...
  • Page 46 Service Manual Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install the support of outdoor unit Install wall-mounting (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor Fix outdoor unit...

  • Page 47: Installation Parts-Checking

    Service Manual 8.2 Installation Parts-checking 8.4 Requirements for Electric Connection Name Name 1. Safety Precaution Indoor unit Sealing gum (1) Must follow the electric safety regulations when installing Outdoor unit Wrapping tape the unit. Support of outdoor (2) According to the local safety regulations, use qualified Connection pipe unit power supply circuit and air switch.
  • Page 48 Service Manual in the holes. 5. Connect the Pipe of Indoor Unit (3) Fix the wall-mounting frame on the wall with tapping screws (1) Aim the pipe joint at the corresponding bellmouth.(As show and then check if the frame is firmly installed bypulling the in Fig.5) frame.
  • Page 49 Service Manual 7. Connect Wire of Indoor Unit 8. Bind up Pipe (1) Open the panel, remove the screw on the wiring cover and (1) Bind up the connection pipe, power cord and drain hose then take down the cover.(As show in Fig.11) with the band.(As show in Fig.14) (2) Reserve a certain length of drain hose and power cord for installation when binding them.

  • Page 50: Installation Of Outdoor Unit

    Service Manual 8.6 Installation of Outdoor Unit Refer to the following table for wrench moment of force: Hex nut diameter(inch) Tightening torque(ft·Ibf) 1. Fix the Support of Outdoor Unit(Select it according to Φ1/4 11.10~14.75 the actual installation situation) Φ3/8 22.12~29.50 (1) Select installation location according to the house structure.

  • Page 51: Vacuum Pumping And Leak Detection

    Service Manual Note: 8.8 Check after Installation and Test (1) The through-wall height of drain hose shouldnt be higher Operation than the outlet pipe hole of indoor unit.(As show in Fig.25) (2) Slant the drain hose slightly downwards. The drain hose 1.

  • Page 52: Maintenance

    Service Manual 9. Maintenance 9.1 Error Code List Display Method of Indoor Unit Indicator Display (during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes Name 0.5s) Code Display Operation Cool Heating Indicator Indicator Indicator During cooling and drying Possible reasons: High operation, except indoor...
  • Page 53 Service Manual Display Method of Indoor Unit Indicator Display (during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes Name 0.5s) Code Display Operation Cool Heating Indicator Indicator Indicator Refrigerant Refrigerant recovery. recovery The Serviceman operates it Nominal cooling mode mode for maintenance.
  • Page 54 Service Manual Display Method of Indoor Unit Indicator Display (during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes Name 0.5s) Code Display Operation Cool Heating Indicator Indicator Indicator Decrease Overload or temperature is too All loads operate normally, frequency high;...
  • Page 55 Service Manual Display Method of Indoor Unit Indicator Display (during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes Name 0.5s) Code Display Operation Cool Heating Indicator Indicator Indicator Compressor intermediate Showing during middle cooling or frequence in middle heating test test state During cooling and drying...
  • Page 56 Service Manual Display Method of Indoor Unit Indicator Display (during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes Name 0.5s) Code Display Operation Cool Heating Indicator Indicator Indicator During cooling and drying operation, compressor will stop Refer to the malfunction analysis System is while indoor fan will operate;...
  • Page 57 Service Manual Display Method of Indoor Unit Indicator Display (during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes Name 0.5s) Code Display Operation Cool Heating Indicator Indicator Indicator Malfunction of During cooling and drying phase current operation, compressor will stop detection while indoor fan will operate;...
  • Page 58 Service Manual 1. Outdoor ambient temperature exceeds the operation range of unit (eg: less Cool: compressor and than-20oC or more than 60oC outdoor fan stops operation, for cooling; more than 30oC for Undefined while indoor fan operates; heating); outdoor unit Heat: compressor, outdoor 2.

  • Page 59: Troubleshooting For Main Malfunction

    Service Manual 9.2 Troubleshooting for Main Malfunction ●Indoor unit: 1. Malfunction of Temperature Sensor F1, F2 Main detection points: ● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? ● Is there short circuit due to trip-over of the parts? ●...
  • Page 60 Service Manual 2. Malfunction of Blocked Protection of IDU Fan Motor H6 Main detection points: ● SmoothlyIs the control terminal of PG motor connected tightly? ● SmoothlyIs the feedback interface of PG motor connected tightly? ● The fan motor cant operate? ●...
  • Page 61 Service Manual Start Turn the fan blades by hand under power-off condition Adjust the motor and blade Whether the fan blades assembly so that rotor can run can run smoothly? smoothly. Turn unit on to check whether the malfunction is eliminated.
  • Page 62 Service Manual 3. Malfunction of Protection of Jumper Cap C5 Main detection points: ● Is there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● The motor is broken? ●...
  • Page 63 Service Manual 4. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Main detection points: ● Instant energization afte de-energization while the capacitordischarges slowly? ● The zero-cross detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: Start Turn power off for 1minute,the turn...
  • Page 64 Service Manual 5. Malfunction of detecting plate(WIFI) JF Start check if the connection wire are correctly connected detecting Replace the plate with the same model Is malfunction eliminated Replace the mainboard with the same model The end Installation and Maintenance...
  • Page 65 Service Manual 6. Malfunction of Insufficient fluorine protection F0 （4） Troubleshooting for F0 malfunction Heat exchangers are Clean the heat exchangers and remove Malfunction is too dirty or the air inlet/outlet eliminated. blockage of air inlet/outlet. is blocked. Compressor doesn't work Malfunction is Make compressor run normally.
  • Page 66 Service Manual 7. Communication malfunction E6 Start Cut off power supply. Check if connection line of IDU and ODU and the wire inside electric box are correctly connected. Connect the line Correct connection? according to Malfunction eliminated? wiring diagram. Main board matches Match correctly with display board? Main board of Malfunction eliminated?
  • Page 67 Service Manual 8. Malfunction of Overcurrent Protection E5 Main detection points: ● Is the supply voltage unstable with big fluctuation? ● Is the supply voltage too low with overload? ● Hardware trouble? Malfunction diagnosis process: Start Normal fluctuation should be within 10 % Is malfunction Is the supply voltage unstable of the rated voltage on the nameplate...
  • Page 68 Service Manual ●Outdoor unit: (1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel) Main Check Points: ●Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC. ●Is the reactor (L) correctly connected? Is the connection loose or fallen? Is the reactor (L) damaged? Fault diagnosis process: Turn on the unit...
  • Page 69 Service Manual (2) IPM protection, phase current overcurrent (the control board as below indicates the control board of outdoor unit) H5/P5 Mainly detect: (1) Compressor COMP terminal (2) voltage of power supply (3) compressor (4) Refrigerant-charging volume (5) air outlet and air inlet of outdoor/indoor unit Troubleshooting: Turn on the unit after energization...
  • Page 70 Service Manual (3) High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Is outdoor ambient temperature in normal range? ●Are the outdoor and indoor fans operating normally? ●Is the heat dissipation environment inside and outside the unit good? Fault diagnosis process: Overheat and high temperature protection...
  • Page 71 Service Manual (4) Start-up failure (following AP1 for outdoor unit control board) Mainly detect: ●Whether the compressor wiring is connected correct? ●Is compressor broken? ●Is time for compressor stopping enough? Fault diagnosis process: Power on the unit Restart it up after Is stop time of the compressor 3 minutes longer than 3 minutes?
  • Page 72 Service Manual (5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Is the system pressure too high? ●Is the input voltage too low? Fault diagnosis process: Out of step occurs in Out of step occurs once the operation unit is powered on.
  • Page 73 Service Manual (6) Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board) Mainly detect: ●Is the PMV connected well or not? Is PMV damaged? ●Is refrigerant leaked? Fault diagnosis process: 20 minutes after the complete unit is powered off Is the terminal FA for the Connect the...
  • Page 74 Service Manual (7) Communication malfunction: (following AP1 for outdoor unit control board) Mainly detect: ●Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? ●Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is there any damage? Fault diagnosis process: Start...
  • Page 75 Service Manual (8) Overload and high discharge temperature malfunction Main detection points: ● If the electronic expansion valve is connected well? Is the electronic expansion valve damaged? ● If the refrigerant is leaked? ● The compressor overload protection terminal is not connected well with the mainboard? ●...
  • Page 76 Service Manual H3 or E4 is displayed 30min after power off the unit If the overload protector SAT is well connected? Under ambient temperature, test the resistance of overload protector with ohmmeter; resistance value should be＜1000ohm Connect wire If the wiring terminal FA of electronic according to wiring expansion valve is well connected? diagram...

  • Page 77: Troubleshooting For Normal Malfunction

    Service Manual 9.3 Troubleshooting for Normal Malfunction 1. Air Conditioner Cant be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether its due to power failure. If yes, No power supply, or poor After energization, operation indicator isnt bright wait for power recovery.
  • Page 78 Service Manual 4. ODU Fan Motor Cant Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram firmly...

  • Page 79: Exploded View And Parts List

    Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit LI012CI-160P432-1 LI012HI-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 80 Service Manual Part Code Description LI012CI-160P432-1 LI012HI-160P432-1 Product Code 20Y03 20Y11 Front Panel 27230014341 27230014341 Filter Sub-Assy 1112246803 1112246803 Display Board 30565260 30565260 Front Case Assy 00000200045 00000200045 Guide Louver 1051293101 1051293101 Helicoid Tongue 26112436 26112436 Left Axile Bush 10512037...
  • Page 81 Service Manual LI018CI-160P432-1 LI018HI-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 82 Service Manual Part Code Description LI018CI-160P432-1 LI018HI-160P432-1 Product Code 20Y05 20Y13 Front Panel 27230014342 27230014342 Filter Sub-Assy 1112208906 1112208906 Decoration board(left and right) 20192662 20192662 Front Case 2002248401 2002248401 Guide Louver 1051276501 1051276501 Axile Bush 10542036 10542036 Air Louver(Manual) 10512732 10512732 Helicoid Tongue 26112512...
  • Page 83 Service Manual LI024CI-160P432-1 LI024HI-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 84 Service Manual Part Code Description LI024CI-160P432-1 LI024HI-160P432-1 Product Code 20Y07 20Y17 Front Panel 27230014343 27230014343 Filter Sub-Assy 1101200703 1101200703 Screw Cover 2425245301 2425245301 Front Case 2002248603 2002248603 Air Louver(Manual) 10512737 10512737 Helicoid Tongue 26112513 26112513 Left Axile Bush 10512037 10512037 Display Board 30565260 30565260...

  • Page 85: Outdoor Unit

    Service Manual 10.2 Outdoor Unit LI012HO-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 86 Service Manual Part Code Description LI012HO-160P432-1 Product Code 20Y12 Front Grill 01473012 Front Panel Assy 0153304804 Axial Flow Fan 10333004 Chassis Sub-assy 01700006009601P Clapboard Sub-Assy 0123338502 Drainage Connecter 06123401 Compressor Gasket 009012000027 4-Way Valve Assy 030152060393 Valve Support 0171314201P Cut off Valve Assy 07133474 Valve 07133082...
  • Page 87 Service Manual LI012CO-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 88 Service Manual Part Code Description LI012CO-160P432-1 Product Code 20Y04 Front Grill 01473012 Front Panel Assy 0153304804 Axial Flow Fan 10333004 Fan Motor 1501308511 Chassis Sub-assy 01700006039402P Compressor Gasket 009012000027 Compressor and Fittings 009001060066 Valve Support 0171314201P Cut off Valve Assy 07133474 Valve Support Block 26113017...
  • Page 89 Service Manual LI018CO-160P432-1 6 7 8 9 10 11 12 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 90 Service Manual Part Code Description LI018CO-160P432-1 Product Code 20Y06 Front Grill 016004060004 Front Panel 000003060115 Axial Flow Fan 10333014 Chassis Sub-assy 209058060167P Clapboard Assy 01233168 Compressor and Fittings 009001060404 Inhalation Tube Sub-assy 030010060613 Discharge Tube Sub-assy 035008061392 Valve Support Assy 01713115P Cut off Valve Assy 1/2 07133774...
  • Page 91 Service Manual LI018HO-160P432-1 LI024HO-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 92 Service Manual Part Code Description LI024HO-160P432-1 LI018HO-160P432-1 Product Code 20Y18 20Y16 Axial Flow Fan 10333023 10333023 Fan Motor 1501506406 1501506406 Electric Box Assy 100002067147 100002068263 Electric Box 20113027 2011302701 Radiator 49013060 49013060 Main Board 300027060877 300027061023 Electric Box Cover 20123028 2012302801 Terminal Board 42200006001401...
  • Page 93 Service Manual LI024CO-160P432-1 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 94 Service Manual Part Code Description LI024CO-160P432-1 Product Code 20Y08 Axial Flow Fan 10333023 Fan Motor 1501506406 Electric Box Assy 100002067145 Electric Box 20113027 Radiator 49013060 Main Board 300027060878 Electric Box Cover 20123028 Terminal Board 42200006001401 Handle 26233014 Left Side Plate 01303025 Coping 01253105...

  • Page 95: Removal Procedure

    11. Removal Procedure Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit LI012CI-160P432-1 LI012HI-160P432-1 Step Procedure 1. Remove filter assembly Front panel Open the front panel.
  • Page 96 Service Manual Step Procedure 4. Remove and electric box cover 2 Screw Electric box cover2 Remove the screw fixing electric box cover 2 and then remove the electric box Detecting plate cover 2. Screw 5. Remove front case sub-assy Screws Remove the screws fixing front case.
  • Page 97 Service Manual Step Procedure 7. Remove electric box assy Screw Loosen the connection clasps between shield cover of electric box sub-assy and Clasps electric box, and then remove the shield cover of electric box sub-assy. Remove the screw fixing electric box assy . Electric box Shield cover of electric box sub-assy...
  • Page 98 Service Manual Step Procedure Instruction: Some wiring terminal of this product is with lock catch and other devices. circlip The pulling method is as below: holder 1.Remove the soft sheath for some terminals at first, hold the circlip and then pull out the terminals.
  • Page 99 Service Manual Step Procedure 9. Remove motor and cross flow blade Remove the screws fixing motor clamp Screws and then remove the motor clamp. Motor clamp Cross flow Remove the screws at the connection Screw Motor place of cross flow blade and motor; lift Holder the motor and cross flow blade upwards sub-assy...
  • Page 100 Service Manual LI018CI-160P432-1 LI024CI-160P432-1 LI018HI-160P432-1 LI024HI-160P432-1 1. Remove filter as s y Front panel Open the front panel. Push the left and right filters to make them break away from the groove on the front case. Then remove the left Front and right filters one by one.
  • Page 101 Service Manual Electric box cover 2 4. Remove electric box cover 2 and detecting plate(WIFI) Screw Remove the screws on the electric box cover 2 and detecting plate(WIFI), then remove the electric box cover 2 and Screws detecting plate(WIFI). Detecting plate (WIFI) Loosen the connection clasps between front case sub-assy and bottom case.
  • Page 102 Service Manual Indoor tube temperature s ensor Cut off the wire binder and pull out the indoor tube temperature sensor. Screw off one grounding screw. Main Remove the wiring terminals of motor and board stepping motor. Remove the electric box assy. G rounding Screw off the screws that are locking each s c rew...
  • Page 103 Service Manual G roove R ear case ass y 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 C lasp rear case assy. Installation and Maintenance...
  • Page 104 Service Manual Installation and Maintenance...

  • Page 105: Removal Procedure Of Outdoor Unit

    Service Manual 11.2 Removal Procedure of Outdoor Unit Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. LI012CO-160P432-1 LI012HO-160P432-1 Take heat pump for example. Steps Procedure 1.Remove cable cross plate 2 and valve cover Before disassamble.
  • Page 106 Service Manual 3.Remove grille and front panel Remove connection 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 panel. Grille Panel 4.Remove axial flow blade...
  • Page 107 Service Manual 6.Remove electric box assy Electric box assy Remove the 2 screws fixing the cover of elec- tric box. Lift to remove the cover. Loosen the wire and disconnect the terminal. Lift to re- move the electric box assy. 7.Remove 4-way valve assy Unscrew the fastening nut of the 4-way Valve 4-way Valve Assy...
  • Page 108 Service Manual 9.Remove motor and motor support Motor support Remove the 4 tapping screws fixing the motor. Pull out the lead-out wire and remove the Motor motor. Remove the 2 tapping screws fixing the motor support. Lift motor support to re- move it.
  • Page 109 Service Manual 11.Remove Compressor Remove the 2 screws fixing the gas valve. Unsolder the welding spot connecting gas valve and air return pipe and remove the gas valve. (Note: it is necessary to warp the gas valve when unsoldering the welding spot.) Remove the 2 Liquid valve screws fixing liquid valve.
  • Page 110 Service Manual LI018CO-160P432-1 NOTE: This models haven’t 4-way valve assy. Before disassamble. 1.Remove cable cross plate 2 and valve cover and top panel Before disassamble. Remove 3 connection screw fixing cable cross plate 2 and then remove the Cable cross plate 2. Cable cross plate 2 Remove 1 connection screw fixing valve cover and then remove the valve cover.
  • Page 111 Service Manual Step Procedure remove the cabinet. Cabinet Screw Remove right side plate and rear grill Right side plate and then remove the right side plate. Screw Screw Remove the screws and then remove the grille. Screw Rear grill Screw Installation and Maintenance...
  • Page 112 Service Manual Step Procedure Remove lef side plate and then remove the letf side plate. Left side plate Screw 6.Remove electric box assy Screw Electric box assy assy ; pull out each wiring terminal; lift the electric box assy upwards to remove it. Note: When pulling out the wiring terminal, pay attention to loose the clasp and dont pull...
  • Page 113 Service Manual Step Procedure 7.Remove motor remove the motor. Screw Motor 8.Remove motor support Motor support and then remove the motor support. Screw 9.Remove 4-way valve assy Unsolder the spot weld of 4-way valve assy, compressor and condenser, and then remove the 4-way valve assy .
  • Page 114 Service Manual Procedure Step 10.Remove compressor Remove 3 foot nuts on compressor, and then remove the compressor. Foot nuts Note: Protect the ports of discharge pipe and suction pipe to avoid foreign objects to enter it. Compressor 11.Remove clapboard Screw then remove the clapboard.
  • Page 115 Service Manual LI018HO-160P432-1 LI024CO-160P432-1 LI024HO-160P432-1 Note: Take heat pump for example. Installation and Maintenance...
  • Page 116 Service Manual Installation and Maintenance...
  • Page 117 Service Manual Installation and Maintenance...
  • Page 118 Service Manual Installation and Maintenance...
  • Page 119 Service Manual Installation and Maintenance...
  • Page 120 Service Manual Installation and Maintenance...

  • Page 121: Appendix

    Service Manual Appendix: Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius （℃） Celsius （℃） Celsius （℃） temperature temperature temperature （℉）...

  • Page 122: Appendix 3: Pipe Expanding Method

    Service Manual Appendix 3: Pipe Expanding Method Pipe Note: Pipe cutter Improper pipe expanding is the main cause of refrigerant leakage.Please expand the pipe according to the following steps: Leaning Uneven Burr A:Cut the pip ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●...

  • Page 123: Appendix 4: List Of Resistance For Temperature Sensor

    Service Manual Appendix 4: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor(15K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 138.1 18.75 138.2 3.848 208.4 1.071 -0.4 128.6 69.8 17.93 3.711 210.2 1.039 121.6...
  • Page 124 Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 181.4 25.01 138.2 5.13 208.4 1.427 -0.4 171.4 69.8 23.9 4.948 210.2 1.386 162.1 71.6 22.85 141.8 4.773 1.346 153.3 73.4...
  • Page 125 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -20.2 853.5 120.2 18.34 190.4 4.754 -18.4 799.8 51.8 93.42 17.65 192.2 4.609 -16.6 53.6 89.07 123.8 16.99 4.469 -14.8 703.8 55.4 84.95 125.6 16.36...
  • Page 126 JF00304287 Visit us at www.lennox.com, or contact us at 1-877-726-0024. © 2014 Lennox Industries Inc. For a complete list of the registered and common law trademarks owned by Lennox Industries Inc., please visit www.lennox.com.

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