Lennox LNINV2610 Service Manual Download Page 67

Page: 67 / 85

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6.Remove vertical louver

7.Remove electric box

Loosen the clasps connecting vertical

louver with bottom case.

Disconnect the indoor pipe tempera-

ture sensor.

Remove the screw of the electric box.

Remove the screws at the joint of

ground wire and evaporator.

clasps

Remove the vertical louver.

Heat exchanger

thermistor

vertical louver

screw

Ground Wire

screws

Steps

Procedure

Summary of Contents for LNINV2610

Page 1: ...Service Manual...

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Page 9: ...DB35 C WB24 C Indoor air flow Super High Pipe length 7 5m Conditions Indoor DB20 C WB15 C Outdoor DB7 C WB6 C Indoor air flow Super High Pipe length 7 5m Compressor speed rps Compressor speed rps RROL...

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Page 13: ...P LDJUDP RQQHFWLRQ SLSH VSHFL FDWLRQ LTXLG SLSH PP DV SLSH PP Indoor unit Outdoor unit COOLING HEATING 4 Way valve Discharge Suction Heat exchanger evaporator Heat exchanger condenser Valve Valve Liqu...

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Page 15: ...1 COMP HEATER EH1 SAT 0 RT3 RT2 0 RT1 0 YEGN BU PE PE W3 E COMU AC L1 N1 OVC COMP XT1 N 1 2 3 L1 W2 W4 W1 L1 W12 RD CN2 W9BU N3 N2 COMP YEGN E U W V L2 L2 L2 W7 W6 W5 PE W8 COMP W COMP V COMP U BU RD...

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Page 19: ...F Button X FAN Button TEMP Button LIGHT Button SLEEP Button CLOCK Button TURBO Button Button 2 6 8 3 9 10 7 5 12 11 4 1 Operation mode Temp display type 21 2 XWWRQ 3UHVV WKLV EXWWRQ FDQ WXUQ RQ RU WXU...

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Page 30: ...cm At least 15cm At least 250cm Space to the wall S p a c e t o t h e o b s t r u c t i o n r o o l f e h t o t e c a p S Space to the obstruction Drainage pipe Space to the wall Space to the obstruct...

Page 31: ...r unit Make the bound pipes pass through the wall hole and then connect outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installati...

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Page 37: ...k power supply circuit Power plug is not well plugged in and poor connection Check if the plug is properly plugged in and make the loose contact firm Fuse of controller burnt out The air condi tioner...

Page 38: ...heat insulation for the thick and thin pipes is good Heat insulation must also be provided for the joint andthe exposed part of the copper pipe Block of outdoor heat ex changer Clean the dust accumula...

Page 39: ...heat insulation for the thick and thin pipes is good Heat insulation must also be provided for the joint andthe exposed part of the copper pipe Block of outdoor heat ex changer Clean the dust accumula...

Page 40: ...r Drainage pipe blocked or broken Change drainage pipe Re wrap and make it tight Wrap of refrigerant pipe joint is not close enough Water leakage Change controller Wire loose or wrong connection In co...

Page 41: ...discharge protection overload 5 Overcurrent protection E5 OFF 3S and blink 5 times OFF 3S and blink 5 times During cooling and drying operation compressor and outdoor fan stop while indoor fan operate...

Page 42: ...nt temperature sensor is open short circuited F3 OFF 3S and blink 3 times OFF 3S and blink 6 times During cooling and drying operating compressor stops while indoor fan operates During heating operati...

Page 43: ...ring board XT if the voltage is higher than 265VAC turn on the unit after the supply voltage is increased to the normal range 2 If the AC input is normal measure the voltage of electrolytic capacitor...

Page 44: ...tion analysis of capacitor 29 Malfunction of module temperature sensor circuit P7 OFF 3S and blink 18 times During cooling and drying operation compressor will stop while indoor fan will operate Durin...

Page 45: ...ontrol end 3 Fan motor is stalling 4 Motor malfunction 5 Malfunction of mainboard rev detecting circuit 38 Desynchro nizing of compressor H7 OFF 3S and blink 7 times During cooling and drying operatio...

Page 46: ...nstable 46 Malfunction of complete units current detection U5 OFF 3S and blink 13 times During cooling and drying operation the compressor will stop while indoor fan will operate During heating operat...

Page 47: ...icator has 3 kinds of display status and during blinking ON 0 5s and OFF 0 5s Operation Indicator Cool Indicator Heating Indicator Yellow Indicator Red Indicator Green Indicator 53 Normal communica ti...

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Page 50: ...ault with the voltage testing circuit on control panel AP1 Replace the control panel AP1 Measure the AC voltage between terminalL andN on wiring board XT power supply Voltage within 210VAC 250VAC Shut...

Page 51: ...igh 5 Other conditions resulting in that the system pressure becomes too high The connection of capacitor C2 is loose Reconnect the capacitor C2 according to Electrical Wiring Diagram Then Restart the...

Page 52: ...erature protection Is outdoor ambient temperature higher than 53 20 minutes after the complete unit is powered off Is heat dissipation of the indoor unit and outdoor unit abnormal Normal protection pl...

Page 53: ...FRPSUHVVRU VWRSSLQJ HQRXJK DXOW GLDJQRVLV SURFHVV Y N Y N N Y Y N Power on the unit Is stop time of the compressor longer than 3 minutes Restart it up after 3 minutes Does startup fail Are the wires f...

Page 54: ...for the compressor connected correctly Is connection sequence right Is the connection made in clockwise direction Connect the wires correctly Replace the control panel AP1 If the fault is eliminated...

Page 55: ...0 minutes after the complete unit is powered off Is the terminal FA for the electronic expansion valve connected correctly Connect the wires correctly Resistances between the first four pins close to...

Page 56: ...e or short circuit Replace it as per the wiring diagram and reconnect the wires If the fault is eliminated Remove the PFC capacitor and measure resistance between the two terminals Is the resistance a...

Page 57: ...perate normally before the failure occurs The AP1 voltage detection circuit is at fault Check wiring inside of the indoor and outdoor units Are wires broken Check the communication circuit of the outd...

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Page 64: ...WLRQ GLVFKDUJH WKH UHIULJHUDQW FRPSOHWHO EHIRUH UHPRYDO 1 Remove the filter Open the panel Loosen the clasp of the filter Remove axile bush of horizontal louver Push the filter inward and then raise i...

Page 65: ...end the horizontal louver slightly to remove it 4 Remove electric box cover 2 3 Remove front panel Slide the rotor shaft out of the groove Remove the front panel rotor shaft front panel Remove the scr...

Page 66: ...ase Open the screw cap on the front case Remove the screws fixing the front case left Remove the electric box cover2 Loosen the left middle and right clasps screws Remove the front case middle right f...

Page 67: ...necting vertical louver with bottom case Disconnect the indoor pipe tempera ture sensor Remove the screw of the electric box Remove the screws at the joint of ground wire and evaporator clasps Remove...

Page 68: ...ic box Re move electric box cover Disconnect the connecting wire of the motor Disconnect the connecting wire of the step motor Remove the screw fixing the display Remove the display Remove the electri...

Page 69: ...te of the con necting pipe Remove the screw fixing the press plate of the connecting pipe Auxiliary Piping Pipe Clamp screw Pipe Clamp 1 2 9 Remove the evaporator Remove the 3 screws at the joint of t...

Page 70: ...ws fixing the step motor Remove the step motor 10 Remove cross flow blade and motor Heat Exchanger Step Motor 3 1 Remove the screws fixing the press plate of the motor Remove the motor Remove cross fl...

Page 71: ...0DLQWHQDQFH 6HUYLFH 0DQXDO Remove the screws at the joint of cross flow blade and motor Remove the motor O Gasket sub assy of Bearing Ring of Bearing Remove ring of bearing Cross Flow Fan Fan Motor 4...

Page 72: ...QG GLVFKDUJH WKH UHIULJHUDQW FRPSOHWHO EHIRUH UHPRYDO 2 handle 2 Remove top cover 1 Remove big handle top panel 1 Before disassembly Remove the connection screw fixing the big handle and then remove t...

Page 73: ...g the blade and then remove the axial flow blade Remove screws fixing electric box cover and then remove the electric box cover Cut off the tieline pull out all wiring terminals and remove all connect...

Page 74: ...ss should be as quickly as possible and keep wrapping cotton wet all the time Be sure not to burn out the lead out wire of compressor Remove the 4 tapping screws fixing the motor Pull out the lead out...

Page 75: ...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...

Page 76: ...move big handle top panel 1 Before disassembly Remove the connection screw fixing the big handle and then remove the handle Remove connection screws connecting the top cover plate with the front panel...

Page 77: ...move the electric box cover Cut off the tieline pull out all wiring terminals and remove all connection wires and then separate connection wires and electric box Remove screws connecting electric box...

Page 78: ...ss should be as quickly as possible and keep wrapping cotton wet all the time Be sure not to burn out the lead out wire of compressor Remove the 4 tapping screws fixing the motor Pull out the lead out...

Page 79: ...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...

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