Related Manuals for Lennox LNINVE052
Summary of Contents for Lennox LNINVE052
- Page 1 Service Manual Model: LNINVE052/LNINVC052 LNINVE063/LNINVC063 LNINVE070/LNINVC070 LNINVE080/LNINVC080 (Refrigerant R410A)
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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 ............8 2.4 Cooling and Heating Data Sheet in Rated Frequency ............ - Page 3 Service Manual 9. Maintenance ......................... 50 9.1 Precautions before Maintenance ..................50 9.2 Error Code List ........................51 9.3 Troubleshooting for Main Malfunction ................. 62 9.4 Troubleshooting for Normal Malfunction ................75 10. Exploded View and Parts’ List ..............77 10.1 Indoor Unit .........................
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Page 4: Part Ⅰ : Technical Information
Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit: LNINVE052 LNINVE063 LNINVE070 LNINVE080 Outdoor Unit: LNINVC052 LNINVC063 LNINVC070 LNINVC080 Remote Controller: YB1FA(XFAN) Technical Information... -
Page 5: Specifications
Service Manual 2. Specifications 2.1 Specification Sheet Model LNINVE052/LNINVC052 LNINVE063/LNINVC063 Product Code CB162007700_K96357 CB162007800_K96357 Rated Voltage 220-240 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Outdoor Cooling Capacity 5200 6300 Heating Capacity 5850 6300 Cooling Power Input 1590... - Page 6 Service Manual Model of Outdoor Unit LNINVC052 LNINVC063 MISUBISHI ELECTRIC/MITSUBISHI MISUBISHI ELECTRIC/MITSUBISHI Compressor Manufacturer/Trademark ELECTRIC(GUANGZHOU) ELECTRIC(GUANGZHOU) COMPRESSOR CO., LTD COMPRESSOR CO., LTD Compressor Model SNB130FGYMC SNB130FGYMC-L1 Compressor Oil FV50S FV50S Compressor Type Rotary Rotary L.R.A. Compressor RLA Compressor Power Input 1245±5% 1245±5% Overload Protector...
- Page 7 Service Manual Model LNINVE070/LNINVC070 Product Code CB162003700_K96357 Rated Voltage 220-240 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Cooling Capacity 7200 Heating Capacity 8000 Cooling Power Input 2250 Heating Power Input 2460 Cooling Power Current 10.08 Heating Power Current 10.76 Rated Input 3600...
- Page 8 Service Manual Model of Outdoor Unit LNINVC070 MITSUBISHI ELECTRIC(GUANGZHOU) COMPRESSOR Compressor Manufacturer/Trademark CO.,LTD/MITSUBISHI ELECTRIC Compressor Model TNB220FLHMC Compressor Oil PV50S Compressor Type Rotary L.R.A. 45.00 Compressor RLA 9.70 Compressor Power Input 2200 Overload Protector CS-7C-1595 Throttling Method Capillary Operation temp 16~30 Ambient temp (Cooling) 18~43...
- Page 9 Service Manual Model LNINVE080/LNINVC080 Product Code CB162007600_K96357 Rated Voltage 220-240 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Cooling Capacity 8000 Heating Capacity 8400 Cooling Power Input 2460 Heating Power Input 2550 Cooling Power Current 10.91 Heating Power Current 11.31 Rated Input 3600...
- Page 10 Service Manual Model of Outdoor Unit LNINVC080 MISUBISHI ELECTRIC/MITSUBISHI ELECTRIC(GUANGZHOU) Compressor Manufacturer/Trademark COMPRESSOR CO., LTD Compressor Model TNB220FLHMC Compressor Oil PV50S Compressor Type Rotary L.R.A. Compressor RLA Compressor Power Input 2200±5% Overload Protector CS-7C-1595 Throttling Method Capillary Operation temp 16~30 Ambient temp (Cooling) 18~43 Ambient temp (Heating)
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Page 11: Operation Characteristic Curve
Service Manual 2.2 Operation Characteristic Curve Cooling Heating 220V Conditions 220V Indoor:DB27°C/WB19°C Outdoor:DB35°C Indoor air flow:Super High 230V Pipe length:7.5m 230V 240V Conditions Indoor:DB20°C 240V Outdoor:DB7°C/WB6°C Indoor air flow:Super High Pipe length:7.5m 10 20 30 40 50 60 70 80 90 100 Compressor speed (rps) Compressor speed (rps) 2.3 Capacity Variation Ratio According to Temperature... -
Page 12: Cooling And Heating Data Sheet In Rated Frequency
(rps) unit unit Indoor Outdoor P (MPa) T1 (℃ ) T2 (℃ ) in:8~9 in:75~85 27/19 35/24 LNINVE052/LNINVC052 0.9~1.1 Super High High out:10~12 out:37~43 in:7~9 in:75~85 27/19 35/24 LNINVE063/LNINVC063 0.9~1.1 Super High High out:10~12... -
Page 13: Noise Curve
Service Manual 2.5 Noise Curve Indoor side noise Outdoor side noise Super High Middle High Indoor fan motor rotating speed Compressor frequency/Hz LNINVC052 LNINVE052 LNINV5210 LNINV5210 LNINV6310 LNINV7010 LNINVC063 LNINVC070 LNINV6310 LNINV7010 LNINVE063 LNINVE070 LNINV8010 LNINV8010 LNINVC080 LNINVE080 Technical Information... -
Page 14: Outline Dimension Diagram
Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit LNINVE052 Φ55X2 LNINVE063 Φ70X2 LNINVE070 Φ70X2 LNINVE080 Unit:mm Models LNINVE052 LNINVE063 1007 LNINVE070 1178 LNINVE080 1178 Technical Information... -
Page 15: Outdoor Unit
Service Manual 3.2 Outdoor Unit LNINVC052 LNINVC063 Unit:mm LNINVC070 LNINVC080 Unit:mm Installation and Maintenance... -
Page 16: Refrigerant System Diagram
Service Manual 4. Refrigerant System Diagram Indoor unit Outdoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction exchanger (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Capillary Strainer COOLING HEATING Connection pipe specification: Liquid pipe:1/4" (6mm) Gas pipe:1/2"... -
Page 17: 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 Models:LNINVE052 LNINVE063 Technical Information... - Page 18 Service Manual Models:LNINVE070 LNINVE080 ● Outdoor Unit Model:LNINVC052 WARNING Please don't touch any terminal when the voltage of terminal P(DC+) and N(DC-) at AP1 is higher than 30V to prevent the risk of electrical shock! POWER Technical Information...
- Page 19 Service Manual Model:LNINVC063 WARNING Please don't touch any terminal when the voltage of terminal P(DC+) and N(DC-) at AP1 is higher than 30V to prevent the risk of electrical shock! POWER Models:LNINVC070 LNINVC080 WARNING Please don't touch any terminal when the voltage of terminal P(DC+) and N(DC-) at AP1 is higher than 30V to prevent the risk of electrical shock!
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Page 20: Pcb Printed Diagram
Service Manual 5.2 PCB Printed Diagram Indoor Unit Models:LNINVE052 LNINVE063 ● Top view Copper pin terminal of neutral wire Auxiliary heating relay K1, K2 Fan capacitor Protective tube Health relay K3 PG motor terminal Piezoresistor Jumper cap Up&down swing terminal... - Page 21 Service Manual Models:LNINVE070 LNINVE080 ● Top view Interface of fan capacitor Input interface of live wire Fuse Input interface of neutral wire Communication interface of outdoor and indoor fan Low fan Medium fan High fan Interface of neutral wire for fan Interface of auto button Interface of up&down swing Interface of ambient...
- Page 22 Service Manual Outdoor Unit ● Top view Compressor interface Compressor overload protector Temperatrue sensor Electric expansion valve Fan HALL interface Outdoor fan 4-way valve Communication interface with indoor unit Live wire Earthing wire Neutral wire Reactor interface 1 PFC capacitor interface 1 Reactor interface 2 ●...
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Page 23: Function And Control
Service Manual 6. Function and Control 6.1 Remote Controller Introduction Buttons on Remote Controller ON/OFF Button MODE Button +/- Button FAN Button Button CLOCK Button TIMER ON/TIMER-OFF Button X-FAN Button TEMP Button TURBO Button LIGHT Button SLEEP Button Introduction for Icons on Display Screen Operation mode Set fan speed Operation mode... - Page 24 Service Manual ● When selecting auto mode, Air conditioner will start auto operation according to indoor ambient temperature.Set temperature can’t be adjusted and will not be displayed as well. Press "FAN" button can adjust fan speed. Press " " button can adjust fan blowing angle. ●...
- Page 25 Service Manual controller blinks. Press "+" or "-"button to adjust TIMER ON setting. After each pressing "+" or "-"button, TIMER ON setting will increase or decrease 1min. Hold "+" or "-"button, 2s later, the time will change quickly until reaching your required time. Press “ TIMER ON”to confirm it. The word “ON" will stop blinking. " "...
- Page 26 Service Manual Operation Guide 1. After putting through the power, press “ON/OFF” button on remote controller to turn on the air conditioner. 2. Press "MODE" button to select your required mode:AUTO,COOL,DRY,FAN,HEAT. 3. Press “+” or “-“ button to set your required temperature. (Temperature can’t be adjusted under auto mode).
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Page 27: Brief Description Of Modes And Functions
Service Manual 6.2 Brief Description of Modes and Functions Models:LNINV5210 LNINV6310 1 General introduction (1) Buzzer When the controller is energized or receives any command or signal from the buttons or the remote controller, the buzzer will give out a beep. - Page 28 Service Manual Start cooling Tamb. Tpreset -0.5 ˚C Original operating status Tpreset –2 ˚C Stop cooling 7 min. 3 min. 7 min. Graphic instruction: (Same as below) Compressor Indicates operation Outdoor fan motor Indicates stop Indoor fan motor Set fan speed ②...
- Page 29 Service Manual fan motor blows residual heat for a while at set speed to prevent high temperature inside the unit. ◆ When Tset+3.5℃＜ Tamb. ＜ Tset+5℃ , the unit will maintain its previous operation status. ◆ When the unit stops due to malfunction or protection, the compressor, IDU fan motor and ODU fan motor stop operation. ◆...
- Page 30 Service Manual ◆ Timer ON: If timer ON is set during operation of the unit, the unit will continue to operate. If timer ON is set at unit OFF, upon ON time reaches the unit will start to run according to previous setting status. ◆...
- Page 31 Service Manual ④ Swing function is available only when swing function is set and IDU fan motor is operating. (8) Display of nixie tube on indoor unit ◆ When energized & started for the first time, the nixie tube defaults to displaying current set temperature. ◆...
- Page 32 Service Manual ① If the unit is equipped with the remote controller with HEALTH button, the unit defaults health function ON. Health function will be closed by pressing the HEALTH button on remote controller or turning off the unit. ② If the unit is equipped with the remote controller without HEALTH button, the unit defaults health function ON. Health function will be closed when turning off the unit.
- Page 33 Service Manual (9) Compressor overload protection (indoor unit displays H3 in cooling, heating or dry mode) ① If disconnection of compressor overload switch is detected for 3S continuously, the system will stop for compressor overload protection; when the protection is eliminated and the compressor has stopped for 3min, the unit will resume running; ②...
- Page 34 Service Manual Models:LNINV7010 LNINV8010 Indoor Units 1.Basic function of system (1)Cooling mode (1) Under this mode, fan and swing operates at setting status. Temperature setting range is 16~30 (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 35 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 16 ℃...
- Page 36 Service Manual (15) X-fan mode When X-fan function is turned on, after turn off the unit, indoor fan will still operate at low speed for 2min and then the complete unit will be turned off. When x-fan function is turned off, after turn off the unit, the complete unit will be turned off directly. (16) 8º...
- Page 37 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 38 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 39 Service Manual 1. Starting estimation: After the compressor stopped working for 180s, if T > [T (the temperature of hysteresis is 2 )], the inner pipe frozen-preventing frequency-limited temperature 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 40 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 41 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 42 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 43 Service Manual 6. Electric Heating Function of Chassis (1) When Toutdoor amb.≤0 , the electric heating of chassis will operate; (2) When Toutdoor amb.>2 , the electric heating of chassis will stop operation; (3)When 0 <Toutdoor amb.≤2 , the electric heating of chassis will keep original status. 7.
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Page 44: 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 45 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 46: Installation
Service Manual 8. Installation 8.1 Installation Dimension Diagram Installation dimension diagram Space to the wall Space to the wall At least 15cm At least 15cm Drainage pipe Installation and Maintenance... - Page 47 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 48: Installation Parts-Checking
Wall pipe Air-conditioner Air switch capacity LNINVE052 Note: LNINVE063 1.Please contact the local agent for installation. LNINVE070 2.Don't use unqualified power cord. LNINVE080 (4) Properly connect the live wire, neutral wire and grounding 8.3 Selection of Installation Location... - Page 49 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 50 Fig.13) Fig.15 Indoor power cord LNINVE052 LNINVE070 Note: LNINVE063 LNINVE080 (1) The power cord and control wire can't be crossed or...
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Page 51: Installation Of Outdoor Unit
Service Manual 8.6 Installation of Outdoor Unit Refer to the following table for wrench moment of force: 1. Fix the support of outdoor unit(select it according to the Hex nut diameter(mm) Tightening torque(N.m) actual installation situation) Φ6 15~20 Φ9.52 30~40 (1) Select installation location according to the house structure. -
Page 52: Vacuum Pumping And Leak Detection
Service Manual (3) The water outlet can't be placed in water in order to drain 8.8 Check after Installation and Test smoothly.(As show in Fig.26) Operation 1. Check after Installation Check according to the following requirement after finishing installation. The drain hose can't be fluctuant Items to be checked Possible malfunction Has the unit been... -
Page 53: Maintenance
Service Manual 9. Maintenance 9.1 Precautions before Maintenance 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 54: Error Code List
Service Manual 9.2 Error Code List Display Method of Outdoor Unit (Indicator has 3 kinds of Display Method of Indoor Unit display status and they will be displayed circularly Malfunction A/C Status Possible Causes Countermeasures every 5s.) Name Indicator Display (during Display □OFF blinking, ON 0.5s and OFF... - Page 55 Service Manual During cooling and drying operation, See 9.3 High discharge compressor and (diagnosis of Flash Refer to temperature outdoor fan stop overheating 4 times maintenance ■ □ ■ ☆ protection of while indoor prevention every 3s flowchart compressor fan operates. and overload During heating protection)
- Page 56 Service Manual Connection terminal between indoor ambient temperature The unit will sensor and main stop operation board is loose or as it reaches poor connection. the temperature There’s short point. During circuit due to trip- cooling over of the parts Indoor and drying on main board;...
- Page 57 Service Manual Feedback terminal of PG motor hasn't been inserted tightly. Indoor fan, outdoor fan, Control terminal compressor of PG motor and electric is not inserted Blockage Flash heating Refer to tightly. protection of 11 times tube all stop maintenance indoor unit every 3s operation;...
- Page 58 Service Manual During cooling and drying operation, Malfunction compressor and of outdoor Flash outdoor fan stop ambient 3 times □ □ ☆ ■ while indoor temperature every 3s fan operates. sensor During heating operation, all loads stop. During cooling 1. After de- and drying 1.T-SENSOR energization,...
- Page 59 Service Manual Overload; ambient temperature is too 1. Reduce load; All loads high; operates Refrigerant is not Decrease normally, 2. Add refrigerant Flash enough frequency while 3. Replace 9 times ■ ■ □ □ due to high operation Malfunction electronic every 3s air discharge frequency of...
- Page 60 Service Manual During cooling See 9.3 and drying (diagnosis of operation, IPM protection, compressor and Overcurrent Flash desynchronizing Refer to outdoor fan stop protection of 15 times malfunction, maintenance □ ☆ □ □ while indoor phase current every 3s overcurrent flowchart fan operates.
- Page 61 Service Manual During cooling and drying operation, compressor and Flash See 9.3 Refer to outdoor fan stop 24 PFC protection 6 times (diagnosis of PFC maintenance □ ■ ☆ ☆ while indoor every 3s protection) flowchart fan operates. During heating operation, all loads stop.
- Page 62 Service Manual 1. Check whether Wrong match the capacity of During cooling between indoor indoor unit and and drying unit and outdoor outdoor unit is operation, unit; matching with compressor and each other; malfunction Flash outdoor fan stop of read 15 times Hardware □...
- Page 63 Service Manual During cooling and drying operation, Drop compressor and 1. Check Flash Power voltage malfunction outdoor fan stop whether power 20 times is unstable, big □ ■ ■ ■ of DC busbar while indoor supply network is every 3s fluctuation.
- Page 64 Service Manual During cooling and drying operation, compressor and Hardware 1. Replace Zero-crossing outdoor fan stop malfunction of outdoor unit's malfunction of ■ ■ ☆ □ while indoor outdoor unit's main board outdoor unit fan operates. main board; AP1; During heating operation, all loads stop.
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Page 65: Troubleshooting For Main Malfunction
Service Manual 9.3 Troubleshooting for Main Malfunction 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 66 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 67 Service Manual 3. Malfunction of Protection of Jumper Cap C5 Main detection points: ● MalfunctionIs there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● Detectioncircuit of the mainboard isdefined abnormal? Malfunction diagnosis process: Troubleshooting for C5 malfunction...
- Page 68 Service Manual 4. Malfunction of Overcurrent Protection E5 Main detection points: ● EliminatedIs the supply voltage unstable with big fluctuation? ● Is the supply voltage too low with overload? ● Hardware trouble? Malfunction diagnosis process: Troubleshooting for E5 malfunction Is the supply voltage unstable Normal fluctuation is within 10 % of the rated Malfunction is with big fluctuation?
- Page 69 Service Manual 5. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Troubleshooting for U8 malfunction Re-energize1 minute after de-erergization The unit returns to normal. Conclusion:U8 is displayed due U8 is still to instant energization afte de- displayed energization while the capacitor discharges slowly.
- Page 70 Service Manual 6.Capacity charging malfunction (outdoor unit malfunction) (AP1 below means control board of outdoor unit) Main detection points: ● Detect if the voltage of L and N terminal of XT wiring board is between 210VAC-240VAC by alternating voltage meter; ●...
- Page 71 Service Manual 7.IPM protection(H5), desynchronizing malfunction(H7), overcurrent of compressor phase current (P5) (AP1 below means control board of outdoor unit) Main detection points: ● Is voltage input within the normal range ● If the control board AP1 is well connected with compressor COMP? If they are loosened? If the connection sequence is correct? ●...
- Page 72 Service Manual 8.High temperature and overload protection (E8)(AP1 below means control board of outdoor unit) Main detection points: ● If the outdoor ambient temperature is in normal range; ● If the indoor and outdoor fan are running normally; ● If the radiating environment of indoor and outdoor unit is good. E8 is displayed Normal protection, please If the outdoor...
- Page 73 Service Manual 9.Start-up failure (LC) (AP1 below means control board of outdoor unit) Main detection points: ● If the compressor wiring is correct? ● If the stop time of compressor is sufficient? ● If the compressor is damaged? ● If the refrigerant charging amount is too much? Turn on the unit The stop time is not sufficient and If the stop time of compressor...
- Page 74 Service Manual 10.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 75 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 76 Service Manual 11.PFC (correction for power factor) malfunction (outdoor unit malfunction) Main detection points: ● Check if power plug is connected well with the socket ● Check if the reactor of outdoor unit is damaged? Malfunction diagnosis process: start If power plug is connected Is the malfunction Connect the plug correctly well with the socket...
- Page 77 Service Manual 12.Communication malfunction (E6) Main detection points: ● Check if the connection wire and the built-in wiring of indoor and outdoor unit are connected well and without damage; ● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is damaged? Malfunction diagnosis process: If the unit operates normally before malfunction...
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Page 78: Troubleshooting For Normal Malfunction
Service Manual 9.4 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 79 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 80: Exploded View And Parts' List
Service Manual 10. Exploded View and Parts’ List 10.1 Indoor Unit Model:LNINVE052 ON OFF MODE CLOCK TIMER ON X-FAN TEMP TIMER OFF TURBO SLEEP LIGHT Installation and Maintenance... - Page 81 Service Manual Part Code Description LNINVE052 Product Code CB162N07700_K96357 Front Panel Assy 20012286 Filter Sub-Assy 1112208901 Screw Cover 24252016 Baffle Plate 26112228 Front Case Sub-assy 20022172 Air Louver 1 10512116 Air Louver 2 10512117 Helicoid Tongue 26112238 Left Axile Bush...
- Page 82 Service Manual Model:LNINVE063 ON OFF MODE CLOCK TIMER ON X-FAN TEMP TIMER OFF TURBO SLEEP LIGHT Installation and Maintenance...
- Page 83 Service Manual Part Code Description LNINVE063 Product Code CB162N07800_K96357 Front Panel Assy 20012368 Filter Sub-Assy 11122091 Screw Cover 24252016 Front Case Assy 20012329 Air Louver1 10512159 Helicoid Tongue 26112187 Left Axile Bush 10512037 Rear Caseassy 2220211706 Rubber Plug(Water Tray) 76712012 Ringof Bearing 26152025 O-Gasket sub-assy of Bearing...
- Page 84 Service Manual Models:LNINVE070 LNINVE080 ON OFF MODE CLOCK TIMER ON X-FAN TEMP TIMER OFF TURBO SLEEP LIGHT Installation and Maintenance...
- Page 85 Service Manual Part Code Description LNINVE070 LNINVE080 Product Code CB162N03700_K96357 CB162N07600_K96357 Front Panel 20012682 20012682 Filter Sub-Assy 11122112 11122112 Front Case 2000237002 2000237002 Front Case Sub-assy 2000257202 2000257202 Upper Guide Louver 10512062 10512062 Lower Guide Louver 10512063 10512063 Connecting Rod of Swing Louver 10582040 10582040 Air Louver...
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Page 86: Outdoor Unit
Service Manual 10.2 Outdoor Unit Models:LNINVC052 LNINVC063 Installation and Maintenance... - Page 87 Service Manual Part Code Description LNINVC052 LNINVC063 Product Code CB161W03100_K96357 CB161W03200_K96357 Front Grill 22415002 22415002 Front Panel 01535008P 01535008P Drainage Plug 06813401 06813401 Drainage Connecter 06123401 06123401 Chassis Sub-assy 0120386502P 0120386502P Capacitor Clamp Sub-assy 01413098 01413098 Capacitor CBB65 33000065 33000065 Compressor and fittings 00205262 00103807...
- Page 88 Service Manual Models:LNINVC070 LNINVC080 Installation and Maintenance...
- Page 89 Service Manual Part Code Description LNINVC070 LNINVC080 Product Code CB171W04400_K96357 CB161W03300_K96357 Front Grill 22415003 22415003 Cabinet 01435004P 01435004P Left Handle 26235401 26235401 Front Side Plate 01305086P 01305086P Chassis Sub-assy 0120509701P 0120509702P Drainage Connecter 06123401 06123401 Drainage Plug 06813401 06813401 Compressor and Fittings 00105036 00105036 Reactor...
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Page 90: Removal Procedure
Service Manual 11. Removal Procedure Caution: discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit LNINVC052 LNINVC063 Step Procedure 1. Remove filter Open the panel. Panel Loosen the clasp shown in the fig and then pull the left filter and right filer outwards to remove them. - Page 91 Service Manual Step Procedure 3. Remove panel Panel Open the front panel; separate the panel Front panel rotation shaft from the groove fixing the front panel and then removes the front panel. Note: Panel rotation The display of some models is fixed on the panel;...
- Page 92 Service Manual Step Procedure 6. Remove vertical louver Loosen the connection clasps between vertical louver and bottom case to remove vertical louver. Bottom case Vertical louver Clasps 7. Remove electric box assy Loosen the connection clasps between shield cover of electric box sub-assy and electric box, and then remove the shield cover of electric box sub-assy.
- Page 93 Service Manual Step Procedure Remove two screws fixing display. Note: The display of some models is fixed on the panel; unscrew the screws fixing the display on the panel before removing the Display Screws panel. Screws Remove the screw fixing electric box assy and then remove the electric box assy.
- Page 94 Service Manual Step Procedure 9. Remove stepping motor Step motor Screws Remove the screw fixing step motor and then remove the step motor. 10. Remove motor and cross flow blade Remove the screws fixing motor clamp and then remove the motor clamp. Motor clamp Cross flow Remove the screws at the connection...
- Page 95 Service Manual LNINVE070 LNINVE080 Steps Procedure 1. Remove front panel and filter filters Push the left and right part of panel,open it and push the middle of the filter to make the clasps loosened,lift it upward to remove the filter clasps screws Unscrew the 2 screws fixing display board...
- Page 96 Service Manual Steps Procedure 2.Remove airdeflector and electric box cover Push the middle claps of air deflector,bend it slightly to remove the air deflector. air deflector Unscrew a screw fixing electric box cover by screwdriver to remove the electric box cover.
- Page 97 Service Manual Procedure Steps panel case 4.Remove electric box assy Unscrew the screws fixing earth wire. earth wire screws Break out the clasps of electric box cover to clasps remove the electric box cover. clasps electric box cover temperature sensor Pull out the temperature sensor.
- Page 98 Service Manual Steps Procedure Unscrew the 2 screws fixing electric box assy to remove the electric box assy. screws 5.Remove watertray Break out the clasps fixing water tray to remove the water tray. water tray 6.Remove eveporator Remove the connection pipe of indoor and outdoor unit and wire.
- Page 99 Service Manual Procedure Steps Unscrew the screws fixing evaporator evaporator mounted plate mounted plate,then remove the evaporator mounted plate. screws Unscrew the 6 screws fixing evaporator adjust the pipe slightly to remove the evaporator. 7.Remove cross flow louver and motor Remove the connection pipe of indoor and outdoor unit and wire.
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Page 100: 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. LNINVC052 LNINVC063 Step 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... - Page 101 Service Manual Step Procedure 2. Remove grille and cabinet grille Remove the 4 screws connecting the grille and outer case, and then remove the panel grille. Remove the screws connecting the outer case screw with motor support, isolation plate and chassis; lift the outer case upwards;...
- Page 102 Service Manual Step Procedure 4. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the blade. axial flow blade 5.Remove electric box assy grounding wire Remove the grounding wire screw on the e l e c t r i c b o x a s s y a n d t h e n r e m o v e t h e grounding wire.
- Page 103 Service Manual Step Procedure screws Remove the 2 screws fixing the electric box assy and then lift the electric box assy upwards to remove it. electric box assy electric box clasp(right) cover clasp(left) Push the electric box cover in the direction of arrow to make the clasp at the right side separate from the groove;...
- Page 104 Service Manual Step Procedure 6.remove the soundproof sponge. Tear off the sticking stripe and then remove the soundproof sponge. sticking stripe soundproof sponge 7.remove the isolation plate and reactor 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 105 Service Manual Step Procedure 8.Valve Support Sub-Assy Valve Support Unsolder the welding joint connecting the valve Sub-Assy with capillary and condenser; unsolder the welding joint connecting the gas valve and air- liquid return pipe; remove the 2 bolts fixing the gas valve valve to remove the gas valve.
- Page 106 Service Manual Step Procedure Remove the 6 screws fixing the motor and then remove the motor. motor screw 11.Remove condenser condenser Remove the 2 screws fixing the condenser and chassis, and then lift the condenser upwards to remove it. screw screw 12.Remove compressor foot nuts...
- Page 107 Service Manual Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. LNINVC070 LNINVC080 1. Remove top panel Twist off the screws used for fixing the handle, Handle pull the handle up ward to remove it.
- Page 108 Service Manual Remove the screws connecting the front side plate and then remove the front side panel. Remove the screws connecting the panel with the chassis and the motor support, and then remove the panel. panel 3. Remove and right side plate Remove the screws connecting the right side plate with the chassis, the valve support and the electric box, and then...
- Page 109 Service Manual 4. Remove fan motor Remove the nuts fixing the blade and then axial flow blade remove the axial flow blade. fan motor fixing frame Remove the 4 tapping screws fixing the motor; disconnect the leading wire insert of the motor and then remove the motor.
- Page 110 Service Manual 6.Remove Fireproof electric box Fireproof electric box Twist off the screws on fireproof electric box and then remove the fireproof electric box. 7. Remove chassis sub-assy and Isolation sheet Remove the 3 screws fixing the isolationsheet and then remove the Isolation sheet. Isolation sheet 8.
- Page 111 Service Manual 9. Remove compressor compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 10.Remove condenser sub-assy support Remove the screws connecting the support (condenser) and condenser assy,and then remove the support(condenser). condenser sub-assy Dissemble the chassis sub-assy and condenser sub-assy.
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Page 112: 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 113: 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 114: Appendix 4: List Of Resistance For Ambient Temperature Sensor
Service Manual Appendix 4: List of Resistance for Ambient Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579... - Page 115 Service Manual Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(20K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443 1.269 137.2...
- Page 116 Service Manual Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(50K) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35...
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