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Lennox LNINV2610 Service Manual

Refrigerant r410a
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Summary of Contents for Lennox LNINV2610

  • Page 1 Service Manual...
  • Page 9 220V Conditions 220V Indoor:DB27°C/WB19°C Outdoor:DB35°C/WB24°C Indoor air flow:Super High 230V Pipe length:7.5m 230V 240V Conditions Indoor:DB20°C/WB15°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) Conditions Conditions Indoor:DB27°C/WB19°C...
  • Page 10 Outdoor side noise Indoor side noise when blowing LNINV3510 LNINV2610 LNINV3510 LNINV2610 Middle High Supper High Compressor frequency/Hz Indoor fan motor rotating speed...
  • Page 11 Φ55 Φ55...

  • Page 13: Outdoor Unit

    Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction exchanger (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Capillary Strainer Strainer COOLING HEATING...
  • Page 14 POWER ROOM DISPLAY TUBE TEM.SENSOR TEM.SENSOR YEGN W1 BU N(1) DISP-1 DISP-2 W2 BK ROOM TUBE COM-OUT W3 BN YEGN AC-L L-OUT W4 YEGN JUMP EVAPORATOR SWING-UD HEALTH-L HEALTH-N COOL PLASMA GENERATOR YEGN SWING MOTOR(U.D) FAN MOTOR...
  • Page 15 COMP EXHAUST YEGN TUBE OUTROOM COMP TEM.SENSOR TEM.SENSOR TEM.SENSOR YEGN COMP-W COMP-U COMP-V OVC-COMP YEGN N(1) COMU AC-L1 OFAN1 HEAT-N2 HEAT-L HEAT-N1 AC-L2 LX-2 LX-1 HEATER HEATER (COMP) (CHASSIS)
  • Page 19 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 Operation mode Set fan speed Send signal Auto mode Cool mode X-fan mode Dry mode Fan mode Set temperature Heat mode Turbo mode...
  • Page 20 Auto no display (horizontal louvers stops at current position)
  • Page 21 no display...
  • Page 22 Signal sender Battery Reinstall Cover of Remove battery box...
  • Page 26 Cooling angle Heating angle O(0°) O(0°)
  • Page 30 Space to the wall Space to the wall At least 15cm At least 15cm Drainage pipe...
  • Page 31 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 33: Drain Hose

    Wall Wall Level meter Mark in the middle of it Space Space to the to the Open-end wrench wall wall above above Union nut 150mm 150mm Pipe Pipe joint Union nut Pipe Torque wrench Right Left Φ55 Φ55 Rear piping hole Rear piping hole Indoor pipe Insulating pipe...

  • Page 34: Wiring Cover

    Panel Screw Wiring cover Indoor and outdoor power cord Indoor unit pipe Liquid pipe Band Drain hose connection wire sleeve Drain hose Connection pipe Band Indoor power cord Wiring Cover N(1) brown blue black yellow green outdoor unit connection Fig.2 Indoor Outdoor Wall pipe...
  • Page 35 Handle N(1) blue black brown yellow- green indoor unit connection Drain vent Chassis Outdoor drain join t Drain hose At least 3cm above the floor Foot holes screw handle Foot holes The drain hos can't raise upwards Wall Liquid pipe Pipe joint U-shaped curve Liquid...
  • Page 36 The drain hose can't be fluctuant The water outlet can't be placed The drain hose in water can't be fluctuant The water outlet can't be fluctuant Liquid valve Piezometer Gas valve Valve cap Refrigerant charging vent Nut of refrigerant Charging vent Vacuum pump Inner hexagon spanner...
  • Page 37 Measure insulation resistance The breaker trips at once when it to ground to see if there is any is set to “ON”. leakage. Trip of breaker or blow of fuse The circuit or the part of the air conditioner has malfunction. They heat and break the insula- tion and lead to short circuit or The breaker trips in few minutes...
  • Page 38 Improper set of temperature Adjust set temperature If cooling (heating) load is Check the forecasted load of cooling (heating) proper Check and fill the leakage, then The refrigerant has leakage or is vacuumize it and supplement the re- insufficient frigerant as required Leakage between the high pres- Replace the compressor sure and the low pressure in-...
  • Page 39 Improper set of temperature Adjust set temperature If cooling (heating) load is Check the forecasted load of cooling (heating) proper Check and fill the leakage, then The refrigerant has leakage or is vacuumize it and supplement the re- insufficient frigerant as required Leakage between the high pres- Replace the compressor sure and the low pressure in-...
  • Page 40 The torque of the swing motor is not enough First, check whether the connection is Wrong connection The swing fan wrong. If no, replace the parts does not run. The controller is damaged(IC2003 is damaged, the swing relay can not close, etc) C o n t r o l l e r m a l f u n c t i o n ( I C 2 0 0 3 Change controller...
  • Page 41 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 0.5s Display...
  • Page 42 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 0.5s Display...
  • Page 43 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 0.5s Display...
  • Page 44 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 0.5s Display...
  • Page 45 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 0.5s Display...
  • Page 46 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 0.5s Display...
  • Page 47 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 50 Turn on the unit and wait 1 minute Use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor Fault with the voltage Replace the control testing circuit on Voltage higher than 200V? panel AP1 control panel AP1 Measure the AC voltage between terminal L and N on wiring board XT(power supply)
  • Page 51 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 52 Overheat and high temperature protection Normal protection, please operate it after the outdoor ambient temp- Is outdoor ambient temperature higher than 53? erature is normalized. 20 minutes after the complete unit is powered off. Improve the heat Is heat dissipation of the indoor unit dissipation environ- and outdoor unit abnormal? ment of the unit...
  • Page 53 Power on the unit Restart it up after Is stop time of the compressor 3 minutes longer than 3 minutes? Does startup fail? Connect the wires as Are the wires for the compressor connected per the connection correctly? Is connection sequence right? diagram Replace the control panel AP1 If the fault is eliminated?
  • Page 54 Out of step occurs in Out of step occurs once the operation unit is powered on. Check if the fan terminal Is stop time of the Replace the fan Is the outdoor fan working OFAN is connected correctly compressor longer than capacitor C1 normally? 3 minutes?
  • Page 55 20 minutes after the complete unit is powered off Is the terminal FA for the Connect the electronic expansion valve wires correctly connected correctly? Resistances between the first four pins close to the terminal hole and the fifth pin are almost the same, less than 100 ohm.
  • Page 56 Start Check wiring of the reactor (L) of the outdoor unit and the PFC capacitor Replace it as per the Whether there is any wiring diagram and If the fault is eliminated? damage or reconnect the wires short-circuit? Remove the PFC capacitor and measure resistance between the two terminals.
  • Page 57 Start Did the equipment operate normally before the failure occurs? Check the wiring of the indoor and outdoor units with reference to the wiring diagram Check wiring inside of the indoor and outdoor Is the connection right? units Correctly connect the corresponding wires for The AP1 voltage Are wires broken?
  • Page 64 Steps Procedure 1.Remove the filter Open the panel. panel Loosen the clasp of the filter. clasp Push the filter inward and then raise it to remove it. filter 2.Remove horizontal louver Remove axile bush of horizontal louver. axile bush...
  • Page 65 Steps Procedure Bend the horizontal louver slightly to remove it. horizon- tal louver 3.Remove front panel Slide the rotor shaft out of the groove. Remove the front panel. rotor shaft front panel 4.Remove electric box cover 2 Remove the screws fixing the elec- tric box cover 2.
  • Page 66 Steps Procedure electric box cover Remove the electric box cover2. 5.Remove front case Open the screw cap on the front case. Remove the screws fixing the front case. screws clasps Loosen the left, middle and right clasps. left middle front right case Remove the front case.
  • Page 67 Steps Procedure 6.Remove vertical louver Loosen the clasps connecting vertical louver with bottom case. clasps Remove the vertical louver. vertical louver 7.Remove electric box Heat exchanger thermistor Disconnect the indoor pipe tempera- ture sensor. screw Remove the screw of the electric box. screws Ground Wire Remove the screws at the joint of...
  • Page 68 Steps Procedure Remove the clasp connecting elec- tric box cover and electric box. Re- move electric box cover. clasp fan motor signal wire Disconnect the connecting wire of the motor. Disconnect the connecting wire of the step motor. connector of step motor Remove the screw fixing the display.
  • Page 69 Steps Procedure 8.Remove press plate of connecting pipe Pipe Clamp Auxiliary Piping screw Remove the screw fixing the press plate of the connecting pipe. Pipe Clamp Remove the press plate of the con- necting pipe. 9.Remove the evaporator Remove the 3 screws at the joint of the evaporator and bottom case.
  • Page 70 Steps Procedure Heat Remove the evaporator. Exchanger 10.Remove cross flow blade and motor Step Motor Remove the screws fixing the step motor. Remove the step motor. Motor Press Plate Remove the screws fixing the press plate of the motor. Remove the motor. Cross Flow Fan Fan Motor Remove cross flow blade and motor.
  • Page 71 Steps Procedure O-Gasket sub-assy of Remove ring of bearing. Bearing Ring of Bearing Remove the screws at the joint of cross flow blade and motor. Remove Cross Flow Fan the motor. Fan Motor...
  • Page 72 Steps Procedure 1.Remove big handle Before disassembly. Remove the connection screw fixing the big handle and then remove the handle. handle 2. Remove top cover top panel Remove connection screws connecting the top cover plate with the front panel and the right side plate, and then remove the top panel.
  • Page 73 Steps Procedure 3.Remove grille 、 axial flow blade 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.
  • Page 74 Steps Procedure 6.Remove 4-way valve assy Unscrew the fastening nut of the 4-way valve 4-way valve assy assy coil and remove the coil. Wrap the 4 way Valve Assy with wet cotton and unsolder the 4 weld spots connecting the 4-way valve assy to take it out.(Note: Refrigerant shouldbe discharged firstly.) Welding process should be as quickly as possible and keep wrapping...
  • Page 75 Steps Procedure 9.Remove the valves Remove the 2 screws fixing the gas valve and unsolder the welding point between the gas valve and the air-return pipe to remove the gas valve. Remove the 2 screws fixing the liquid valve and unsolder the welding joint connecting the liquid valve to the Y-type pipe to remove the liquid valve.
  • Page 76 Steps Procedure 1.Remove big handle Before disassembly. Remove the connection screw fixing the big handle and then remove the handle. handle 2. Remove top cover top panel Remove connection screws connecting the top cover plate with the front panel and the right side plate, and then remove the top panel.
  • Page 77 Steps Procedure 3.Remove grille 、 right side plate 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.
  • Page 78 Steps Procedure 6.Remove motor and motor support Remove the 4 tapping screws fixing the motor. Pull out the lead-out wire and remove themotor. Remove the 2 tapping screws fixingthe motor support. Lift motor support to re-move it. motor support motor 7.Remove 4-way valve assy 4-way valve assy Unscrew the fastening nut of the 4-way valve...
  • Page 79 Steps Procedure 9.Remove the valves Remove the 2 screws fixing the gas valve and unsolder the welding point between the gas valve and the air-return pipe to remove the gas valve. Remove the 2 screws fixing the liquid valve and unsolder the welding joint connecting the liquid valve to the Y-type pipe to remove the liquid valve.
  • Page 81 Pipe Pipe cutter Leaning Uneven Burr Pipe Shaper Downwards Union pipe Pipe Hard mold Expander Pipe Smooth surface Improper expanding damaged leaning crack uneven surface thickness The length is equal...

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