Table of Contents
Troubleshooting
Related Manuals for Lennox LI009HI-230P432
Summary of Contents for Lennox LI009HI-230P432
- Page 1 Service Manual Models: LI009HI-230P432/LI009HO-230P432 LI012HI-230P432/LI012HO-230P432 LI018HI-230P432/LI018HO-230P432 LI024HI-230P432/LI024HO-230P432 LI036HI-180P432/LI036HO-180P432 (Refrigerant R410A) Thank you for selecting LENNOX air conditioners.
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Page 2: Table Of Contents
Service Manual Table of Contents Part Ⅰ : Technical Information ................. 1 1. Summary ........................1 2. Specifications ......................2 2.1 Specification Sheet ......................2 2.2 Operation Characteristic Curve ..................8 2.3 Capacity Variation Ratio According to Temperature ............9 2.4 Cooling and Heating Data Sheet in Rated Frequency ............. - Page 3 Service Manual 9. Maintenance ........................54 9.1 Error Code List ........................54 9.2 Troubleshooting for Main Malfunction .................. 68 9.3 Troubleshooting for Normal Malfunction ................96 10. Exploded View and Parts List ..............98 10.1 Indoor Unit .......................... 98 10.2 Outdoor Unit ........................106 11.
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Page 4: Part Ⅰ : Technical Information
Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit LI009HI-230P432 LI012HI-230P432 LI018HI-230P432 LI024HI-230P432 LI036HI-180P432 Outdoor Unit LI009HO-230P432 LI018HO-230P432 LI012HO-230P432 LI024HO-230P432 LI036HO-180P432 Remote Controller H O U R ONOFF YAA1FB Technical Information... -
Page 5: Specifications
Service Manual 2. Specifications 2.1 Specification Sheet Model LI009HI-230P432/LI009HO-230P432 LI012HI-230P432/LI012HO-230P432 Product Code Y6752/Y6753 Y6754/Y6755 Rated Voltage 208/230 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min~Max) Btu/h 9000(3100~9600) 12000(3100~13000) Heating Capacity(Min~Max) Btu/h 11000(1911~12000) 13000(2400~14000) Cooling Power Input(Min~Max) - Page 6 Service Manual Model of Outdoor Unit LI009HO-230P432 LI012HO-230P432 Outdoor Unit Product Code Y6753 Y6755 ZHUHAI GREE DAIKIN DEVICE ZHUHAI GREE DAIKIN DEVICE Compressor Manufacturer/Trademark CO.,LTD CO.,LTD Compressor Model 1GDY23AXD 1GDY23AXD Compressor Oil DAPHNE FVC50K DAPHNE FVC50K Compressor Type Swing Swing Compressor Locked Rotor Amp (L.R.A) Compressor RLA Compressor Power Input...
- Page 7 Service Manual Model LI018HI-230P432/LI018HO-230P432 LI036HI-180P432/LI036HO-180P432 Product Code Y6756/Y6757 Y6685/Y6686 Rated Voltage 208/230 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min~Max) Btu/h 18000(6800~20000) 33600(7404~35997) Heating Capacity(Min~Max) Btu/h 19800(7340~23500) 34600(14979~35997) Cooling Power Input(Min~Max) 1435(450~2150) 4100(450~4300) Heating Power Input(Min~Max) 1730(580~2600) 3800(460~4300) Cooling Power Current...
- Page 8 Service Manual Model of Outdoor Unit LI018HO-230P432 LI036HO-180P432 Outdoor Unit Product Code Y6757 Y6686 MITSUBISHI ELECTRIC ZHUHAI LANDA COMPRESSOR Compressor Manufacturer/Trademark (GUANGZHOU)COMPRESSOR CO,LTD. CO. LTD Compressor Model QXA-B141zF030A TNB306FPGMC Compressor Oil RB68EP FV50S Compressor Type Rotary Rotary Compressor Locked Rotor Amp (L.R.A) 67.00 Compressor RLA 12.08...
- Page 9 Service Manual Model LI024HI-230P432/LI024HO-230P432 Product Code Y6758/Y6759 Rated Voltage 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Cooling Capacity(Min~Max) Btu/h 22000(6824~27296) Heating Capacity(Min~Max) Btu/h 23000(6824~30708) Cooling Power Input(Min~Max) 1830(450~3000) Heating Power Input(Min~Max) 2000(450~3000) Cooling Power Current 8.05 Heating Power Current 8.35 Rated Input 3000...
- Page 10 Service Manual Model of Outdoor Unit LI024HO-230P432 Outdoor Unit Product Code Y6759 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO,LTD. Compressor Model QXAS-D23zX090A Compressor Oil RB68EP Compressor Type Rotary Compressor Locked Rotor Amp (L.R.A) Compressor RLA 14.67 Compressor Power Input 2550 Overload Protector 1NT11L-6233/HPC 115/95 /KSD115 Throttling Method Electron expansion valve...
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Page 11: Operation Characteristic Curve
Service Manual 2.2 Operation Characteristic Curve 09/12K Cooling Heating 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) -
Page 12: Capacity Variation Ratio According To Temperature
Compressor frequency(Hz) Compressor frequency(Hz) Service Manual 2.3 Capacity Variation Ratio According to Temperature 09/12K Cooling Heating • Conditions Indoor : DB80˚F/WB66.9˚F • Conditions Outdoor : DB95˚F Indoor : DB70˚F/WB60˚ Indoor air flow : High Outdoor : DB19.94˚F/WB19.04˚F Indoor air flow : High Pipe lengt : 24.6ft Pipe lengt : 24.6ft 89 91... -
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 Service Manual 18/24K Indoor side noise Outdoor side noise Heating Cooling Compressor frequency(Hz) Indoor fan motor rating speed Indoor side noise Outdoor side noise Compressor frequency(Hz) Indoor fan motor rating speed Technical Information...
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Page 15: Outline Dimension Diagram
Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit 33 1/4 8 7/32 21 21/64 7 1/4 4 43/64 09/12K Φ2 1/6 Φ2 1/6 1 3/8 1 3/8 3 19/64 7 13/64 Φ2 1/6 Φ2 1/6 1 1/2 1 1/2 7 1/2 5 1/2 8 7/64... -
Page 16: Outdoor Unit
Service Manual 3.2 Outdoor Unit 09/12K 12 19/32 33 25/64 23 5/16 Unit:inch 13 13/32 15 19/32 Unit: inch Technical Information... - Page 17 Service Manual 24/36K 36 2/9 14 37/64 39 1/2 16 13/16 Unit:inch Technical Information...
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Page 18: Refrigerant System Diagram
Service Manual 4. Refrigerant System Diagram Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Accumlator Suction exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Electron Strainer expansion valve COOLING HEATING Connection pipe specification: Liquid pipe:1/4"... -
Page 19: Electrical Part
Jumper cap Yellow Brown COMP 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 LI009HI-230P432 LI012HI-230P432 63610000133 Technical Information... - Page 20 Service Manual LI018HI-230P432 WARNING WIRED Please don't touch any electronic CONTROLLER component and terminal when the machine is running , stopping or has RECEIVER AND been powered off for less than 3 DISPLAY BOARD minutes to prevent electric shock ! CONNECTOR TERMINAL BLOCK...
- Page 21 Service Manual LI036HI-180P432 63610000469 Technical Information...
- Page 22 Service Manual ● Outdoor Unit LI009HO-230P432 LI012HO-230P432 63610000137 LI018HO-230P432 6361000044801 Technical Information...
- Page 23 Service Manual LI024HO-230P432 63633617 LI036HO-180P432 6361000047001 These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit. Technical Information...
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Page 24: Pcb Printed Diagram
Service Manual 5.2 PCB Printed Diagram Indoor Unit LI009HI-230P432 LI012HI-230P432 ● Top view Neutral wire DC fan Auto button Up&down swing Interface of temperature sensor Interface of wired controller Display interface Jumper interface Fuse Interface of live wire Terminal with outdoor unit communication wire ●... - Page 25 Service Manual LI018HI-230P432 ● Top view Neutral wire DC fan Auto button Up&down swing Left&right swing Temperature sensor Interface of wired controller Display interface Terminal with outdoor unit communication wire Interface of live wire Fuse Protection grounding wire Interface of health function live wire(only for the mode with this function) Interface of health function neutral...
- Page 26 Service Manual LI024HI-230P432 ● Top view Neutral wire DC fan Auto button Up&down swing Left&right swing Temperature sensor Interface of wired controller Display interface Terminal with outdoor unit communication wire Interface of live wire Fuse Protection grounding wire Interface of health function live wire(only for the mode with this function) Interface of health function neutral...
- Page 27 Service Manual LI036HI-180P432 ● Top view Name 2 2 2 Power supply live wire Fuse Interface of neutral wire for health function Power supply neutral wire Interface of communication Power switch High-frequency transformer Interface of fan motor Buzzer Interface of display Interface of display Indoor tube temperature sensor interface...
- Page 28 Service Manual Outdoor Unit LI009HO-230P432 LI012HO-230P432 ● Top view 14 15 ● Bottom view Technical Information...
- Page 29 Service Manual LI018HO-230P432 ● Top view 1 Compressorinter face Interface of low- 9 10 temperature cooling temperature sensor High pressure protection 4 Low pressure protection Interface of temperature sensor Overload interface of compressor electronic expansion valve 8 Interface of DC fan compressor electric heater interface 10 4-way valve interface...
- Page 30 Service Manual LI024HO-230P432 ● Top view 1 Compressorinter face 2 Compressor overload protector 3 Temperature sensor 4 Electric expansion valve 5 Outdoor fan 6 4-way valve Communication interface with indoor unit 8 Live wire 9 Earthing wire 10 Neutral wire 11 Reactor interface 2 12 Reactor interface 1 13 2-way valve interface...
- Page 31 Service Manual LI036HI-180P432 ● Top view Name Name Name 1 High-frequency transformer T1 6 High pressure protection terminal HPP1 11 Terminal of neutral wire Overload protection terminal of 7 Terminal of 4-way valve 12 Protective tube FU101 compressor OVC-COMP 3 Terminal of temp sensor CN2 8 Electric heater band of chassis HEAT2-L 13 Terminal of ground wire High pressure protection terminal...
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Page 32: Function And Control
Service Manual 6. Function and Control 6.1 Remote Controller Introduction 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 button CLOCK button TIMER-OFF button TURBO button LIGHT... - Page 33 Service Manual no display Technical Information...
- Page 34 Service Manual Technical Information...
- Page 35 Service Manual battery reinstall remove Cover of battery box Technical Information...
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Page 36: Brief Description Of Modes And Functions
Service Manual 6.2 Brief Description of Modes and Functions 09/12/18/24K 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 37 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 38 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 39 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 40 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 41 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 42 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 43 Service Manual (12) Starting-up Failure Protection for Compressor Stop the compressor after its starting-up fails, restart it after 20s if the fault doesn’t 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 44 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 45 Service Manual 1. Temperature Parameters Indoor preset temperature(Tpreset) Indoor ambient temperature (Tamb.) 2. Basic Functions Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory functionis available, for the first energization, if the compressor is at stop before de-energization, the compressor will be started withouta 3-minute lag;...
- Page 46 Service Manual When duration of successive heating operation is more than 45 minutes, or accumulated heating time more than 90 minutes, andone of the following conditions is reached, the unit will enter the defrost mode after 3 minutes. a. Toutdoor amb. ≥ 41°F, Toutdoor pipe ≤ 28.4°F; b.
- Page 47 Service Manual c. If Ttube ≥ 136°F, the compressor will run at reduced frequency. d. If Ttube ≥ 144°F, the compressor will stop and the indoor fan will run at preset speed. 2) Heating overload a. If Ttube ≤ 126°F, the unit will return to its original operation state. b.
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Page 48: 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 49 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.
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Page 50: Installation
Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall At least 5 8/9 At least 5 8/9 Space to the wall Drainage pipe Uint:inch Installation and Maintenance... - Page 51 Service Manual Installation procedures 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...
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Page 52: Installation Parts-Checking
Service Manual 8.4 Electric Connection Requirement 8.2 Installation Parts-checking 1. Safety Precaution Name Name (1) Must follow the electric safety regulations when installing Indoor unit Sealing gum the unit. Outdoor unit Wrapping tape (2) According to the local safety regulations, use qualified Support of outdoor power supply circuit and air switch. - Page 53 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 (ST4.2X25TA) and then check if the frame is firmly installed by in Fig.5) pulling the frame.
- Page 54 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 Screw...
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Page 55: Installation Of Outdoor Unit
Service Manual Refer to the following table for wrench moment of force: 8.6 Installation of Outdoor Unit Hex nut diameter Tightening torque(ft·Ibf) 1. Fix the Support of Outdoor Unit(Select it according to Φ1/4 11.10~4.75 the actual installation situation) Φ3/8 22.12~29.50 (1) Select installation location according to the house structure. -
Page 56: Vacuum Pumping And Leak Detection
Service Manual 2. Leakage Detection The drain hos (1) With leakage detector: can't raise upwards Check if there is leakage with leakage detector. (2) With soap water: If leakage detector is not available, please use soap water for Wall leakage detection. Apply soap water at the suspected position and keep the soap water for more than 3min. -
Page 57: Maintenance
Service Manual 9. Maintenance 9.1 Error Code List 09/12K Display of lamp (the times of blinking) Display of Name of malfunction Indoor Outdoor indoor unit Anti-freezing protection Block or Low pressure of refrigerant system Compressor exhaust high temperature protection AC over-current protection Communication failure between indoor unit and outdoor unit Anti-high temperature protection No feedback of indoor fan motor... - Page 58 Service Manual 18/24K There are high-capacity electrolytic capacitors on the outdoor mainboard. Thus, even the power is cut off, there is high voltage inside the capacitors and it needs more than 20min to reduce the voltage to safety value. Touching the electrolytic capacitor within 20min after cutting the power will cause electric shock.
- Page 59 Service Manual 18/24K 1.Power supply is abnormal Malfunction Off 3s of zero-cross The complete unit stops 2.Detection circuit of indoor and blink derection control mainboard is 17 times abnormal Installation and Maintenance...
- Page 60 Service Manual Complete unit Off 3s current and blink detection 13 times malfunction Off 3s Defrosting will occur in and blink heating mode.Compressor once will operate while indoor It’s the normal state (during fan will stop. blinking, ON 10s and Off 05s) Installation and Maintenance...
- Page 61 Service Manual Installation and Maintenance...
- Page 62 Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 63 Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 64 Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 65 Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 66 Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 67 Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 68 Service Manual Display Method of Indoor Unit Display Method of Outdoor Unit Indicator Display (during Indicator has 3 kinds of display blinking, ON 0.5s and OFF status and during blinking, ON Dual-8 Malfunction A/C status Possible Causes 0.5s) 0.5s and OFF 0.5s Code Name Operation...
- Page 69 Service Manual Installation and Maintenance...
- Page 70 Service Manual Analysis or processing of some of the malfunction display: 1. Compressor discharge protection Possible reasons: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser;the system has noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage inside four-way valve causes incorrect operation;...
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Page 71: Troubleshooting For Main Malfunction
Service Manual 9.2 Troubleshooting for Main Malfunction Malfunction of Temperature Sensor F1, F2 ●Indoor unit: Main.detection.points: 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 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 72 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 can't operate? ●...
- Page 73 Service Manual 3. Malfunction of Blocked Protection of IDU Fan Motor H6 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.
- Page 74 Service Manual 4. 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 75 Service Manual 5. 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 76 Service Manual 6. 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 77 Service Manual 7. 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 78 Service Manual ●Outdoor unit: 09/12/36K (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 79 Service Manual (2) IPM Protection, Out-of-step Fault, Compressor Phase Overcurrent (AP1 below refers to the outdoor control panel) Main check points: ●Is the connection between control panel AP1 and compressor COMP secure? Loose? Is the connection in correct order? ●Is the voltage input of the machine within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT) ●Is the compressor coil resistance normal? Is the insulation of compressor coil against the copper tube in good condition? ●Is the working load of the machine too high? Is the radiation good?
- Page 80 Service Manual Energize and switch on Use AC voltmeter If the voltage Check the supply to measure the IPM protection between terminal L voltage and voltage between occurs after the and N on wiring machine has run for terminal L and N restore it to board XT is within a period of time?
- Page 81 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 82 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 83 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 84 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 85 Service Manual (7) Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken Fault diagnosis process: Start Check wiring of the...
- Page 86 Service Manual (8) 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 87 Service Manual (9) Communication malfunction:(following AP1 for outdoor unit control board) Mainly detect: 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? Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? The flow chart fir malfunction detect: Start Did the equipment operate...
- Page 88 Service Manual (10) High-pressure Protection High-pressure protection Use pressure gauge to Measure if the pressure switch Replace the mainboard of measure if the pressure is is normal outdoor unit really high? Check if the operation mode of Set the correct operation Replace the pressure switch indoor unit is set properly? mode...
- Page 89 Service Manual 18/24K 1.Key detection point Test9 Test3 Test4 Test2 Test1 Test5 Test8 Tset7 Test6 Test10 Test11 Test12 Test value under normal Test NO Test point Corresponding component condition Test 1 Between A and C Neutral and live wires 160V~265V Test 2 Between B and C Neutral and live wires...
- Page 90 Service Manual 2.Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit) Main detection point: ● Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter; ● Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged? Malfunction diagnosis process: Turn on the unit and wait 1 minute...
- Page 91 Service Manual 3.IPM protection, desynchronizing malfunction, phase current of compressor is overcurrent (AP1 below is control board of outdoor unit) Main detection point: ● If control board AP1 and compressor COMP is well connected? If they are loosened? If the connection sequence is correct? ●...
- Page 92 Service Manual Energize and switch on Use AC voltmeter If the voltage Check the supply to measure the IPM protection between terminal L voltage and voltage between occurs after the and N on wiring machine has run for terminal L and N restore it to board XT is within a period of time?
- Page 93 Service Manual 4.Diagnosis for anti-high temperature, overload protection (AP1 below is control board of outdoor unit) Main detection point: ● If the outdoor ambient temperature is in normal range; ● If the indoor and outdoor fan is running normal; ● If the radiating environment of indoor and outdoor unit is well. Malfunction diagnosis process: Anti-high temperature, overload protection...
- Page 94 Service Manual 5.Diagnosis for failure start up malfunction (AP1 below is control board of outdoor unit) Main detection point: ● If the compressor wiring is correct? ● If the stop time of compressor is enough? ● If the compressor is damaged? ●...
- Page 95 Service Manual 6. Diagnosis for compressor synchronism (AP1 below is control board of outdoor unit) Main detection point: ● If the system pressure is over-high? ● If the work voltage is over-low? Malfunction diagnosis process: Synchronism Synchronism after energize the unit occurred during and start it operation...
- Page 96 Service Manual 7.Diagnosis for overload and discharge malfunction (AP1 below is control board of outdoor unit) Main detection point: ● If the electron expansion valve is connected well? Is the expansion valve damaged? ● If the refrigerant is leakage? ● If the overload protector is damaged? Malfunction diagnosis process: After the unit de-energized...
- Page 97 Service Manual 8.Communication malfunction (AP1 below is control board of outdoor unit) Main detection point: ● Check if the connection wire and the built-in wiring of indoor and outdoor unit is connected well and no damaged; ● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is dam- aged Malfunction diagnosis process: Start...
- Page 98 Service Manual 9.Diagnosis process for outdoor communication circuit Start Test voltage value with Test 10 position in diagram with voltage meter Number jumping Test voltage value with Test 13 position in diagram with voltage meter Number jumping Outdoor unit malfunction Test voltage value with Test 11 position in...
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Page 99: Troubleshooting For Normal Malfunction
Service Manual 9.3 Troubleshooting for Normal Malfunction 1. Air Conditioner Can't be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether it's due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t bright wait for power recovery. - Page 100 Service Manual 4. ODU Fan Motor Can't 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...
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Page 101: Exploded View And Parts List
Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit LI012HI-230P432 LI009HI-230P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance... - Page 102 Service Manual Part Code Description LI009HI-230P432 LI012HI-230P432 Product Code Y6752 Y6754 Front Panel 20000300018S 20000300018S Display Board 30565260 30565260 Filter Sub-Assy 11122468 11122468 Front Case Assy 00000200045 00000200045 Helicoid Tongue 26112507 26112507 Left Axile Bush 10512037 10512037 Rear Case assy...
- Page 103 Service Manual LI018HI-230P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
- Page 104 Service Manual Part Code Description LI018HI-230P432 Product Code Y6756 Decorative Strip Front Panel 20000300023 Display Board 30565260 Filter Sub-Assy 1112208904 Decorative Board (Left) 20192662 Front Case 2002248401 Guide Louver 1051276501 Axile Bush 10542036 Air Louver 10512732 Helicoid tongue 26112512 Left Axile Bush 10512037 Rear Case assy 22202571...
- Page 105 Service Manual LI024HI-230P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
- Page 106 Service Manual Part Code Description LI024HI-230P432 Product Code Y6758 Front Panel 20000300016 Filter Sub-Assy 11012007 Screw Cover 2425245301 Front Case Assy 00000200057 Air Louver(Manual) 10512737 Helicoid Tongue 26112513 Left Axile Bush 10512037 Rear Case assy 22202570 Rubber Plug (Water Tray) 76712012 Ring of Bearing 26152025...
- Page 107 Service Manual LI036HI-180P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
- Page 108 Service Manual Part Code Description LI036HI-180P432 Product Code Y6685 Receiver Window Front Panel 20000300022S Stand bar 2421212001 Filter Sub-Assy 11122106 Front Case Sub-Assy 2002215801 Upper Guide Louver 1051216601 Lower guide louver 1051216701 Axile Bush 10542704 Air Louver 2 1051216902 Air Louver 1 1051216802 Connecting Rod 10582086...
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Page 109: Outdoor Unit
Service Manual 10.2 Outdoor Unit LI009HO-230P432 LI012HO-230P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance... - Page 110 Service Manual Part Code Description LI009HO-230P432 LI012HO-230P432 Product Code Y6753 Y6755 Front Grill 01473012 01473012 Cabinet 0143305801P 0153501604 Axial Flow Fan 10333004 10333004 Fan Motor 1501308505 1501308505 Electrical Heater 76510010 76510010 Chassis Sub-assy 0120380601P 0120380601P Drainage Connecter 06123401 06123401 Electrical Heater(Compressor) 76513004 76513004 Compressor and Fittings...
- Page 111 Service Manual LI018HO-230P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
- Page 112 Service Manual Part Code Description LI018HO-230P432 Product Code Y6757 Fan Motor 1501506402 Terminal Board 4201025501 Electric Box 20115003 Radiator 49010252 Main Board 30138000873 Electric Box Cover 20125002 Electric Box Assy 10000100632 Left Handle 26233053 Left Side Plate 01305093P Motor Support Sub-Assy 01705067 Condenser Support Plate 01795031...
- Page 113 Service Manual LI024HO-230P432 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
- Page 114 Service Manual Part Code Description LI024HO-230P432 Product Code Y6759 Front Grill 01473050 Fan Motor 1501403402 Electric Box (Fireproofing) 01413426 Radiator 49015215 Main Board 30138000504 Electric Box Assy 10000100164 Wire Clamp 71010003/71010102 Terminal Board 42010255 Left Handle 26235401 Left Side Plate 01305043P Coping 01255006P...
- Page 115 Service Manual LI036HO-180P432 11 12 13 14 15 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
- Page 116 Service Manual Part Code Description LI036HO-180P432 Product Code Y6686 Front Grill 01473050 Cabinet 0143500401P Front Side Plate 01303249P Axial Flow Fan 10335014 Drainage Plug 06813401 Chassis Sub-assy 02803026P Drainage Connecter 06123401 Compressor Gasket 76710207 Compressor and fittings 00205275 Electrical heater 7651873209 Magnet Coil 4300040029...
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Page 117: Removal Procedure
Service Manual 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 09/12K Step Procedure Front panel the groove on the front panel. - Page 118 Service Manual Step Procedure 4. Remove electric box cover 2 Screw Electric box cover 2 Remove the screws on the electric box cover t2 o remove the electric box cover 2. 5. Remove front case sub-assy Screws Remove the screws fixing front case. Note: 1.Open the screw caps before removing the screws around the air outlet.
- Page 119 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 120 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 121 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 122 Service Manual 18/24K 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. case Left filter Groove...
- Page 123 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. Screw off the screws that are locking S wing motor the swing motor and take the motor off. Installation and Maintenance...
- Page 124 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 125 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 126 Service Manual Installation and Maintenance...
- Page 127 Service Manual Steps Procedure 1.Before disassembly of the unit Axonometric drawing for the complete unit. 2.Remove filter panel Open the panel. Loosen the clasps on the filter. clasps Draw out two pieces of filter. filter Installation and Maintenance...
- Page 128 Service Manual Steps Procedure B2 panel 3.Remove display A3/A5 panel display Remove screws fixing display, and then remove the display. 4.Remove panel clasps Pull the clasps at both sides slightly, and then remove the panel. panel 5.Remove horizontal louver Remove the axial bush on the horizontal louver, and then remove the horizontal louver.
- Page 129 Service Manual Steps Procedure 6.Remove top cover of electric box Remove screws fixing the top cover of electric box. screw Remove the top cover of electric box. top cover of electric box screw cap 7.Remove front case Remove the screw caps on front case. screw Remove screws connecting the front case.
- Page 130 Service Manual Steps Procedure 8.Remove earthing wire screw Remove earthing screws, and then remove the earthing wire. 9.Remove electric box cover clasp Loosen clasps at the left side of electric box. Loosen clasps on the right side of electric box. clasp electric box cover Remove electric box cover.
- Page 131 Service Manual Steps Procedure 10.Remove temperature sensor Pull out the indoor temperature sensor. temperature sensor 11.Remove electric box Pull out 6 sockets on PCB board. Pull out two screws on electric box. screw electric box Remove the electric box. Installation and Maintenance...
- Page 132 Service Manual Steps Procedure 12.Remove water tray water tray Pull the water tray upwards, and then remove the water tray. 13.Remove connection pipe between indoor and outdoor units Separate the connection pipe between indoor and outdoor units. connection position for indoor and outdoor units' connection pipe 14.Remove pipe-stopping plate Remove two screws on pipe-stopping plate for indoor unit, and then remove the pipe-stopping...
- Page 133 Service Manual Steps Procedure 16.Remove evaporator screw Remove screws between evaporator and bottom case. Turn over the indoor unit and adjust the pipe line to the position as shown by the broken line. Lift up the evaporator, and then remove the evaporator.
- Page 134 Service Manual Steps Procedure 18.Remove cross flow blade and motor blade motor Remove screws fixing cross flow blade and motor. Remove the motor sub-assy. Separate two cross flow blade. Installation and Maintenance...
- Page 135 Service Manual Steps Procedure 19.Remove cushion rubber Remove the cushion rubber on cross flow blade. cushion rubber Remove the cushion rubber from the base. Installation and Maintenance...
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Page 136: 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. 09/12K Steps Procedure 1.Remove cable cross plate sub-assy and valve cover cable cross plate sub-assy... - Page 137 Service Manual Steps Procedure 4.Remove front panel front panel Remove connection screws connecting the front panel with the chassis and the motor support, and then remove the front panel. 5.Remove right side plate Remove connection screws connecting the right side plate right side plate with the valve support and the electric box.
- Page 138 Service Manual Steps Procedure 7.Remove motor and motor support motor support tor Pull out the lead-out wire and remove themotor. Remove the 2 tapping screws re-move it. motor 8.Remove electric box assy electric box assy Remove the 2 screws fixing the cover of elec-tric box.
- Page 139 Service Manual Steps Procedure 10.Remove 4-way valve assy 4-way valve assy Unscrew the fastening nut of the 4-way Valve Assy coil and remove the coil. Wrap the 4-way Valve Assy with wet cotton and unsolderthe 4 weld spots connecting the 4-way Valve Assy to take it out(Note: Refrig- erant shouldbe discharged firstly.) Welding processshould be as quickly as possible and...
- Page 140 Service Manual Steps Procedure 1. Remove big handle,valve cover and top cover big handle Remove the screw connecting the big handle and right side plate, and then remove the big handle. Remove the screw connecting the valve cover and right side plate, and then remove the valve cover. valve cover Remove the screws connecting the top cover with top cover...
- Page 141 Service Manual Steps Procedure Remove the screws connecting the outer case with motor support, isolation plate and chassis; lift the outer case upwards; loosen the clasps of outer case with right side plate and left side plate, and then remove the outer case. outer case 3.
- Page 142 Service Manual Steps Procedure 4. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the blade. axial flow fan motor support Remove the 6 screws fixing the motor and then remove the motor. Remove the 2 screws connecting the motor support and chassis, and then loosen the stopper to remove the motor support.
- Page 143 Service Manual Steps Procedure 6. Remove the soundproof sponge Tear off the sticking stripe and then remove the soundproof sponge. soundproof sponge 7. Remove isolation plate Remove the 2 screws connecting the isolation plate and condenser side plate; remove the 3 screws connecting the isolation plate and chassis, and then remove the isolation plate.
- Page 144 Service Manual Steps Procedure 9. Remove compressor 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 from foreign objects. condenser sub-assy 10.
- Page 145 Service Manual 24/36K Steps Procedure 1. Remove big handle,valve cover and top cover Remove the screw connecting the big handle and right side plate, and then remove the big handle. Remove the screw connecting the valve cover and right side plate, and then remove the valve cover. handle valve cover 2.Remove top panel...
- Page 146 Service Manual Steps Procedure 4.Remove grille and panel Twist off the screws connecting the grille and panel, and then remove the grille. Twist off the screws connecting the panel, chassis and motor support with screwd-river, and then remove the panel. grille panel 5.Remove right side plate...
- Page 147 Service Manual Steps Procedure 7.Remove electric box electric box Twist off the screws on electric box, cut off the tieline with scissors or pliers, pull out the wiring terminal, pull it upwards to remove the electric box. Twist off the screws on electric box (fireproofing) electric box with screwdriver, and then remove the electric (fireproofing)
- Page 148 Service Manual Steps Procedure 9.Remove motor support Twist off the tapping screws fixingthe motor support, pull it upwardsand then remove the motor support. motor support 10.Remove isolation sheet Twist off the screws connecting isolation sheet and end plate of condenser and chassis, and then remove the isolation sheet.
- Page 149 Service Manual Steps Procedure 12.Remove gas valve and liquid valve Twist off the 2 bolts fixing the valve sub-assy. Unsolder the soldering joint between gas valve and air-return pipe and then remove the gas valve.(note: when unsoldering the soldering joint, wrap the gas valve with wet cloth completely to gas valve avoid the damage to valve, and release all...
- Page 150 Service Manual Steps Procedure 15.Remove left side plate Twist off the screws connecting the left side plate and chassis with screwdriver, and then remove the left side plate. left side plate 16.Remove chassis and condenser Pull it upwards to separate the chassis and condenser.
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Page 151: 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 152: 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 153: 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 154 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 155 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...
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