Lennox LI036CI-180P432 Service Manual Download

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Thank you for selecting LENNOX air conditioners.

Service Manual

Model: LI036CI-180P432 LI036CO-180P432

(Refrigerant R410A)

Summary of Contents for LI036CI-180P432

Page 1: ...Thank you for selecting LENNOX air conditioners Service Manual Model LI036CI 180P432 LI036CO 180P432 Refrigerant R410A ...

Page 2: ...ng Diagram 9 5 2 PCB Printed Diagram 11 6 Function and Control 13 6 1 Remote Controller Introduction 13 6 2 Brief Description of Modes and Functions 17 Part Ⅱ Installation and Maintenance 26 7 Notes for Installation and Maintenance 26 8 Installation 29 8 1 Installation Dimension Diagram 29 8 2 Installation Parts checking 31 8 3 Selection of Installation Location 31 8 4 Requirements for Electric Co...

Page 3: ...ed View and Parts List 73 10 1 Indoor Unit 73 10 2 Outdoor Unit 75 11 Removal Procedure 77 11 1 Removal Procedure of Indoor Unit 77 11 2 Removal Procedure of Outdoor Unit 86 Appendix 92 Appendix 1 Reference Sheet of Celsius and Fahrenheit 92 Appendix 2 Configuration of Connection Pipe 92 Appendix 3 Pipe Expanding Method 93 Appendix 4 List of Resistance for Temperature Sensor 94 Table of Contents ...

Page 4: ...1 Technical Information Service Manual 1 Summary Part Ⅰ Technical Information Indoor Unit LI036CI 180P432 LI036CO 180P432 Outdoor Unit LI036CO 180P432 Remote Controller YAA1FB ...

Page 5: ... W SEER 18 00 SCOP Application Area m2 46 70 Indoor Unit Model of indoor unit LI036CI 180P432 Indoor Unit Product Code Y6669 Fan Type Cross flow Diameter Length DXL mm Φ108X522 7 Fan Motor Cooling Speed SH H M L r min 1400 1250 1000 800 Fan Motor Heating Speed SH H M L r min Output of Fan Motor W 70 Fan Motor RLA A 0 4 Fan Motor Capacitor μF Evaporator Form Aluminum Fin copper Tube Pipe Diameter m...

Page 6: ...ter mm Φ9 52 Rows fin Gap mm 2 1 4 Coil Length LXDXW mm 940 5X44X762 Fan Motor Speed rpm 890 Output of Fan Motor W 170 Fan Motor RLA A 0 73 Fan Motor Capacitor μF Air Flow Volume of Outdoor Unit m3 h 4400 Fan Type Axial flow Fan Diameter mm Φ21 21 32 Defrosting Method Climate Type T1 Isolation I Moisture Protection IP24 Design Pressure High PSIG 550 Design Pressure Low PSIG 240 Sound Pressure Leve...

Page 7: ...9 64ft DB 80 F WB66 F Indoor air flow Super High 4 5 14 110 100 90 80 70 60 50 40 23 32 41 50 Conditions Indoor DB70 F Indoor air flow Super High Pipe length 24 39 64ft Cooling Heating 24K 0 2 4 6 8 10 12 14 0 20 40 60 80 100 120 0 2 4 6 8 10 12 14 0 20 40 60 80 100 120 Condition Indoor DB 80 F WB66 F Indoor air flow Super High Pipe length 24 39 64ft Condition Indoor DB 70 F Indoor air flow Super ...

Page 8: ...f gas pipe connecting indoor and outdoor unit Inlet and outlet pipe temperature of heat exchanger Fan speed of indoor unit Fan speed of outdoor unit Compressor revolution rps Indoor Outdoor P PSIG T1 F T2 F 70 20 19 All model 507 550 134 4 to 102 36 to 39 Super High High 58 Instruction T1 Inlet and outlet pipe temperature of evaporator T2 Inlet and outlet pipe temperature of condenser P Pressure a...

Page 9: ...6 Technical Information Service Manual 3 Outline Dimension Diagram 3 1 Indoor Unit 53 9 64 12 53 64 10 11 19 32 3 1 2 1 37 64 13 25 32 10 29 3 8 Φ2 3 4 Φ2 3 4 Unit mm ...

Page 10: ...7 Technical Information Service Manual Unit mm 3 2 Outdoor Unit 14 37 64 16 13 16 39 1 2 36 2 9 15 9 16 24 ...

Page 11: ...ation Liquid pipe 1 4 Gas pipe 5 8 Heat exchanger condenser Electron expansion valve Indoor unit Outdoor unit Accumlator COOLING Discharge Suction Heat exchanger evaporator Valve Valve Liquid pipe side Gas pipe side Compressor Strainer 4 Refrigerant System Diagram ...

Page 12: ...ge Note Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model 63610000469 3OHDVH GRQ W WRXFK DQ HOHFWURQLF FRPSRQHQW RU WHUPLQDO ZKHQ WKH PDFKLQH LV UXQQLQJ VWRSSLQJ RU KDV EHHQ SRZHUHG RII IRU OHVV WKDQ PLQXWHV WR SUHYHQW HOHFWULF VKRFN 287 225 81 7 8 5 1 1 1 7 50 1 2 5220 7 03 78 7 03 6 1625 6 1625 63 2 5 5 9 5 1 0 1 2 5 0 02725 6 1 5 21752 5 211 725 80...

Page 13: ...57 8 9 1 1 29 5 2 3527 725 0 1 7 5 1 3 1 5 3 02725 32 5 8 1 5 1 8 7 1 225 81 7 1 1 1 2 7 50 1 0 1 7 1 5 1 1 8 1 1 1 1 8 5 725 1 1 20 1 2 1 8 51 1 3OHDVH GRQ W WRXFK DQ HOHFWURQLF FRPSRQHQW RU WHUPLQDO ZKHQ WKH PDFKLQH LV UXQQLQJ VWRSSLQJ RU KDV EHHQ SRZHUHG RII IRU OHVV WKDQ PLQXWHV WR SUHYHQW WKH ULVN RI HOHFWULF VKRFN 1 1 127 0RWRU JURXQG RQO DSSOLHV WR WKH LURQ VKHOO PRWRU The above data is sub...

Page 14: ...face of communication 6 Power switch 7 High frequency transformer 8 Interface of fan motor 9 Buzzer 10 Interface of display 11 Interface of display 12 Indoor tube temperature sensor interface 13 Ambient temperature sensor interface 14 Interface of wired controller 15 Interface of left and right swing terminal 16 Interface of up and down swing terminal 17 Auto button 18 Interface of BMS 19 Jumper c...

Page 15: ...rminal of compressor OVC COMP 7 Terminal of 4 way valve 12 Protective tube FU101 3 Terminal of temp sensor CN2 8 Electric heater band of chassis HEAT2 L 13 Terminal of ground wire 4 High pressure protection terminal HPP 9 Electric heater band of compressor HEAT1 L 14 Choke L 101 and L102 5 Electronic expansion valve terminal EV 10 Terminal of live wire 15 Terminal of outdoor fan OFAN DC 1 2 3 4 5 ...

Page 16: ...Indoor ambient temp Sleep mode Clock Heat mode Fan mode Dry mode Cool mode Auto mode Operation mode I feel X fan mode health function Note After putting through the power the air conditioner will give out a sound Operation indictor is ON red indicator After that you can operate the air conditioner by using remote controller Under on status pressing the button on the remote controller the signal ic...

Page 17: ...on Press this button to set up down swing angle which circularly changes as below This remote controller is universal If any command or is sent out the unit will carry out the command as indicates the guide louver swings as 7 I FEEL Button Press this button to turn on I FEEL function The unit automatically adjust temperature according to the sensed temperature Press this button again to cancel I F...

Page 18: ...o turn on the display s light and press this button again to turn off the display s light If the light is turned on is displayed If the light is turned off disappears 16 X FAN Button Pressing X FAN button in COOL or DRY mode the icon is displayed and the indoor fan will continue operation for 2 minutes in order to dry the indoor unit even though you have turned off the unit After energization X FA...

Page 19: ...e to indoor unit during operation Replace new batteries of the same model when replacement is required When you don t use remote controller for a long time please take out the batteries If the display on remote controller is fuzzy or there s no display please replace batteries 1 Press the back side of remote controller marked with of battery box along the arrow direction 2 Replace two 7 AAA 1 5V d...

Page 20: ...ure is the set value under each condition Ambient temperature is Tamb Tcompensation for heat pump unit and Tamb for cooling only unit 4 If theres I feel function Tcompensation is 0 Others are same as above 5 Fan mode Under this mode indoor fan operates at set fan speed Compressor outdoor fan 4 way valve and electric heating tube stop operation Indoor fan can select to operate at high medium low or...

Page 21: ...be still in standby mode after finishing refrigerant recycling if the unit is in ON status before refrigerant recycling it will still run in original operation mode 11 Ambient temperature display control mode 1 When user set the remote controller to display set temperature corresponding remote control code 01 current set temperature will be displayed 2 Only when remote control signal is switched t...

Page 22: ...f the compressor is shut down and Tsetup Tindoor ambient temperature Tcooling indoor ambient temperature compensation 32 9ºF start up the machine for cooling the cooling operation will start 2 During operations of cooling if 32ºF Tsetup Tindoor ambient temperature Tcooling indoor ambient temperature compensation 35 6ºF the cooling operation will be still running 3 During operations of cooling if 3...

Page 23: ...hed on 2 Defrosting a Defrosting starts the compressor is shut down and restarts it after 55 second delay b Defrosting ends the compressor stops then starts it after 55 second delay 2 Outer Fans Control Notes Only the outer fans run for at least 80s in each air flow speed can the air flow be switched After the outer fans run compulsively in high speed for 80s when the machine starts up control the...

Page 24: ...e it should not be started and should be stopped to treat according to the overload protection Clear the trouble at the mode of power turn off heating and the protection times are not counted 2 Frequency limited If TCooling overload frequency limited temperature Touter pipe T Cooling overload frequency reducing temperature at normal speed you should limit the frequency raising of compressor 3 Redu...

Page 25: ...rature at normal speed during discharging you should limit the frequency raising of compressor 3 Reducing frequency at normal speed and stopping machine If Tfrequency reducing temperature at normal speed during discharging TDischarge Tfrequency reducing temperature at high speed during discharging you should adjust the compressor frequency by reducing 8Hz 90s till the lower limit After it was runn...

Page 26: ...he compressor frequency by reducing 30Hz 90s till the lower limit After it was running 90s at the lower limit if Tfrequency reducing temperature at normal speed of module T Module you should stop the machine for module overheating protection 5 Power turn off If the TPower turn off temperature of module TModule you should stop the machine for module overheating protection If TModule TLimited freque...

Page 27: ... regarded as four way valve reversion abnormity And then it can run if stop the reversion abnormity protection for four way valve 3 min and if it still cant run when the reversion abnormity protection for four way valve happens to stop working for 3 times in succession it is available if presses ON OFF Attention the protection shall be shielded during the testing mode and defrosting process and it...

Page 28: ...peration 3 When 32ºF Toutdoor amb 35 6ºF the electric heating of chassis will keep original status 7 Electric Heating Function of Compressor 1 When Toutdoor amb 23ºF compressor stops operation while the electric heating of compressor starts operation 2 When Toutdoor amb 28 4ºF the electric heating of compressor stops operation 3 When 23ºF Toutdoor amb 28 4ºF the electric heating of compressor will...

Page 29: ... the unit adequately grounded The grounding wire cant be used for other purposes 6 Must apply protective accessories such as protective boards cable cross loop and wire clip 7 The live wire neutral wire and grounding wire of power supply must be corresponding to the live wire neutral wire and grounding wire of the air conditioner 8 The power cord and power connection wires cant be pressed by hard ...

Page 30: ...ssure rise or compressor rupture resulting in injury 4 During refrigerant recovery make sure that liquid valve and gas valve are fully closed and power is disconnected before detaching the connection pipe If compressor starts running when stop valve is open and connection pipe is not yet connected air will be sucked in and cause pressure rise or compressor rupture resulting in injury 5 When instal...

Page 31: ...ing tape 4 Electroprobe 7 Electronic leakage detector 10 Pipe pliers pipe cutter 2 Screw driver 5 Universal meter 8 Vacuum pump 11 Pipe expander pipe bender 3 Impact drill drill head electric drill 6 Torque wrench open end wrench inner hexagon spanner 9 Pressure meter 12 Soldering appliance refrigerant container ...

Page 32: ...5 7 8 inch At least 5 7 8 inch 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 obstruction Space to the obstructio Space to the obstruction At least 19 11 16 inch At least 11 7 8 inch At least 19 11 16 inch At least 11 7 8 inch At least 78 3 4 inch A t l e a s t 1 1 8 i n c h ...

Page 33: ...hang the indoor 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 installation Note this flow is only for reference please find the more detailed installation steps in this section Select outdoor unit installation location Install the support of outdoor unit sel...

Page 34: ... is out of reach for children 5 The location should be able to withstand the weight of indoor unit and wont increase noise and vibration 6 The appliance must be installed 72inch above floor 7 Dont install the indoor unit right above the electric appliance 8 Please try your best to keep way from fluorescent lamp 3 Outdoor Unit 1 Select a location where the noise and outflow air emitted by the outdo...

Page 35: ...ting Frame 1 Choose the position of piping hole according to the direction of outlet pipe The position of piping hole should be a little lower than the wall mounted frame As show in Fig 1 5 Connect the Pipe of Indoor Unit 1 Aim the pipe joint at the corresponding bellmouth As show in Fig 5 2 Pretightening the union nut with hand 3 Adjust the torque force by referring to the following sheet Place t...

Page 36: ...e 1 Bind up the connection pipe power cord and drain hose with the band As show in Fig 14 2 Reserve a certain length of drain hose and power cord for installation when binding them When binding to a certain degree separate the indoor power and then separate the drain hose As show in Fig 15 3 Bind them evenly 4 The liquid pipe and gas pipe should be bound separately at the end 9 Hang the Indoor Uni...

Page 37: ...t Outdoor Electric Wire 1 Let the connection wire sleeve go through the two holes of baffle tighten the connection joint of sleeve and baffle remove the wire clip connect the power connection wire and power cord to the wiring terminal according to the color fix them with screws As show in Fig 23 6 Neaten the Pipes 1 The pipes should be placed along the wall bent reasonably and hidden possibly Min ...

Page 38: ...er press ON OFF button on the remote controller to start operation Press MODE button to select AUTO COOL DRY FAN and HEAT to check whether the operation is normal or not If the ambient temperature is lower than 16 the air conditioner cant start cooling 2 Leakage Detection 1 With leakage detector Check if there is leakage with leakage detector 2 With soap water If leakage detector is not available ...

Page 39: ...Fig 1 1 2 LCD display 1 1 LCD Display of Wired Controller 1 2 Instruction to LCD Display No Symbols Description 1 Swing function 2 Air exchange function this function is yet unavailable for this unit 3 Sleep function Only sleep 1 4 Each kind of running mode of indoor unit auto mode 5 Cooling mode 6 Dry mode 7 Fan mode 8 Heating mode 9 Defrosting function for the outdoor unit 10 Gate control functi...

Page 40: ...of the indoor unit range 16 30 C Timer setting range 0 5 24 hr 6 3 Fan Setting of the high middle low auto fan speed 4 Mode Setting of the Cooling Heating Fan Dry Auto mode of the indoor unit 6 Function Switchover among the functions of Turbo Save E heater Blow etc 7 Timer Timer setting 8 On Off Turn on off the indoor unit 4 2 Mode Press them for 5s under off state of the unit to enter cancel the ...

Page 41: ...r decreased by 1 C every 0 5s as shown in Fig 3 3 1 In the Cooling Dry Fan or Heating mode the temperature setting range is 16 30 C 61 86 F In the Auto mode the setting temperature is unadjustable 3 4 Fan Setting Under the On state of the unit press Fan and then fan speed of the indoor unit will change circularly as shown in Fig 3 4 1 3 5 Timer Setting Under on state of the unit Press Timer button...

Page 42: ... timer on and then press Timer to confirm Cancel timer After setting of timer if Timer button is pressed LCD won t display xx Hour so that timer setting is canceled Timer off setting under the On state of the unit is shown as Fig 3 5 1 Fig 3 5 1 Timer off Setting under the On State of the Unit Fig 3 5 2 Timer on Setting under the Off State of the Unit Timer on setting under the Off state of the un...

Page 43: ... off When the Sleep function is activated press Function to enter the Sleep setting status After that press Enter Cancel to cancel this function In the Cooling or Dry mode the temperature will increase by 1 C 1 2 F after the unit runs under Sleep1 for 1hr and 1 C 1 2 F after another 1hr After that the unit will run at this temperature In the Heating mode the temperature will decrease by 1 C 1 2 F ...

Page 44: ...ancel to cancel this function Turbo function setting is as shown in Fig 3 8 1 Turn off the unit without Sleep function activated Press Function repeatedly unitll go to the Sleep setting status Press Enter Cancel to activated the Sleep function Press Enter Cancel to cancel this setting Fig 3 7 1 Sleep Setting Press Function repeatedly unitll go to the Sleep function again Turn off the unit without ...

Page 45: ...vaporated to avoid mildew In the Cooling or Dry mode press Function till the unit enters the Blow setting status and then press Enter Cancel to active this function When the Blow function is activated press Function to the Blow setting status and then press Enter Cancel to cancel this function Blow function setting is as shown in Fig 3 10 1 Turn off the unit without E heater function activated Tur...

Page 46: ... activated Memory will be displayed If this function is not set the unit will be under the Off state after power failure and then power recovery Memory recovery If this function has been set for the wired controller the wired controller after power failure will resume its original running state upon power recovery Memory contents On Off Mode set temperature set fan speed and Lock function 4 Instal...

Page 47: ...e four core twisted pair line into the slot of the wired controller and then buckle the front panel and the soleplate of the wired controller together 5 Finally fix the front panel and the soleplate of the wired controller tightly by screws ST2 9X6 CAUTION Please pay special attention to the followings during the connection to avoid the malfunction of the air conditioning unit due to electromagnet...

Page 48: ...ring during the operation of the system the error code will be displayed on the LCD as show in Fig 5 1 If multi errors occur at the same time their codes will be displayed circularly Note In event of any error please turn off the unit and contact the professionally skilled personnel Fig 5 1 ...

Page 49: ...ischarge protection overload 5 Overcurrent protection E5 OFF 3S and blink 5 times OFF 1S and blink 5 times During cooling and drying operation compressor and outdoor fan stop while indoor fan operates During heating operation all loads stop 1 Supply voltage is unstable 2 Supply voltage is too low and load is too high 3 Evaporator is dirty 6 Communi cation Malfunction E6 OFF 3S and blink Always 6 O...

Page 50: ...4 Outdoor ambient temperature sensor is open short circuited F3 OFF 3S and blink 3 times OFF 1S and blink 6 times During cooling and drying operating compressor stops while indoor fan operates During heating operation the complete unit will stop operation Outdoor temperature sensor hasnt been connected well or is damaged Please check it by referring to the resistance table for temperature sensor 1...

Page 51: ... wiring 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 C on control panel AP1 if its normal theres malfunction for the circuit please replace the control panel AP1 22 Voltage of DC bus bar is too low PL OFF 3S and blink 21 times OFF 1S and blink 12 tim...

Page 52: ...unction 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 During heating operation the complete unit will stop Replace outdoor control panel AP1 30 Module high temperature protection P8 OFF 3S and blink 19 times During cooling operation compressor will stop wh...

Page 53: ...r control 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 operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation Refer to the malfunction analysis IPM protection loss of synchronism protection a...

Page 54: ...age is unstable 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 operating the complete unit will stop operation Theres circuit malfunction on outdoor units control panel AP1 please replace the outdoor units control panel AP1 47 The four way valve is abnormal U7 ...

Page 55: ...ion Indicator Cool Indicator Heating Indicator Yellow Indicator Red Indicator Green Indicator 53 Normal communica tion 54 Defrosting OFF 3S and blink once during blinking ON 10s and OFF 0 5s OFF 0 5S and blink once OFF 1S and blink twice Defrosting will occur in heating mode Compressor will operate while indoor fan will stop operation Its the normal state 55 Malfunction of zero cross detection cir...

Page 56: ...53 Installation and Maintenance Service Manual ...

Page 57: ... Possible reasons insufficient or too much refrigrant blockage of capillary an dincrease of suction temp improper running of compressor burning in or stuck of bearing damage of discharge valve malfunction of protector Processing method adjust refrige rant amount replace the capillary replace the compressor use univers al meter to check if the contactor of compress or is fine when it is not over he...

Page 58: ...inboard broken Malfunction diagnosis process Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted Start Insert the temperature sensor tightly Yes Yes Yes Yes Yes Yes No No No No No No Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated Replace it with a temperature sensor with the same model Make the parts upright Is there ...

Page 59: ...ion is eliminated Reinsert the wiring terminal of indoor fan It s the malfunction of main board Replace a new main board that is of the same model It s the malfunction of main board Replace a new main board that is of the same model Replace a new main board that is of the same model It s the malfunction of main board Then check whether the voltage between terminal 2 and terminal 3 of the motor int...

Page 60: ...f the mainboard is defined abnormal Malfunction diagnosis process Start Is there jumper cap on the mainboard Is the jumper cap inserted correctly and tightly Replace the jumper cap with the same model Appearance of the jumper cap Assemble the jumper cap with the same model Insert the jumper cap tightly Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated Replace the mainbo...

Page 61: ... the compressor Replace the mainboard with the same model End Is the supply voltage too low with overload Is the indoor outdoor heat exchanger dirty or are the air inlet and outlet blocked The fan is abnormal Fan speed is too low or fan doesn t rotate Measure the current of live wire on the main board with a clamp ampere meter Is the current higher than the value of the overcurrent protection Is t...

Page 62: ...charges slowly The zero cross detectioncircuit of the mainboard is defined abnormal Malfunction diagnosis process Turn power off for 1minute the turn back on The unit returns to normal Conclusion U8 is displayed due to power off on while the capacitor discharges slowly U8 is still displayed The zero cross detection circuit of the mainboard is defined abnormal Replace the mainboard with the same mo...

Page 63: ...ss Start Cut off power supply Check if connection line of IDU and ODU and the wire inside electric box are correctly connected Correct connection Main board matches with display board Main board of IDU matches with that of ODU Communication cord is damaged Replace IDU s main board Malfunction eliminated End Connect the line according to wiring diagram Match correctly according to product specifica...

Page 64: ...ult 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 down the power and repair the power supply to restore the range 210VAC 250VAC power on and restart the unit If the fault is eliminated Shut down the power and wait 20 minutes or use DC voltmeter to me...

Page 65: ...is too high resulting in that the system pressure is too high and exceeds the permissible range 4 If the charge volume of refrigerant is too much resulting in that the system pressure is too high 5 Other conditions resulting in that the system pressure becomes too high Take corrective actions according to Technical Service Manual and then energize and start the unit If there is any abnormality des...

Page 66: ...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 please operate it after the outdoor ambient temp erature is normalized Improve the heat dissipation environ ment of the unit Does the outdoor fan work normally 1 Check if the fan terminal OFAN is connec...

Page 67: ...e for compressor stopping enough Fault diagnosis process 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 for the compressor connected correctly Is connection sequence right Connect the wires as per the connection diagram Replace the control panel AP1 If the fault is eliminated Replace the compresso...

Page 68: ...or 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 Replace the compressor End Out of step occurs in operation Is the outdoor fan working normally Is the outdoor unit blocked by foreign objects Replace the control panel AP1 If the fault is eliminated Replace the compre...

Page 69: ... process 20 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 the terminal hole and the fifth pin are almost the same less than 100 ohm Replace the electronic expansion valve If the fault is eliminated If the fault is eliminated Replace the control pan...

Page 70: ...N N N Y Y Start Check wiring of the reactor L of the outdoor unit and the PFC capacitor Whether there is any damage or short circuit Replace it as per the wiring diagram and reconnect the wires If the fault is eliminated Disconnect the terminals for the reactor and measure the resistance between the two terminals of the reactor by an ohm gauge Whether there is any damage or short circuit Replace t...

Page 71: ...ipment operate 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 outdoor unit If the fault is eliminated The communication circuit is abnormal Replace the main board of the indoor unit End If the fault is eliminated Replace the main board AP1 of the outdoor uni...

Page 72: ...he main board AP1 of the outdoor unit If the fault is eliminated Is the connection right Check the wiring of the indoor and outdoor units with reference to the wiring diagram Correctly connect the corresponding wires for the indoor and outdoor units with reference to the wiring diagram 9 Communication malfunction following AP1 for outdoor unit control board Mainly detect Detect the indoor and outd...

Page 73: ...or swing louver is fully open Check if the capacity output of outdoor unit is equal to the capacity demand of indoor units Check if the indoor outdoor filters or radiating fins are dirty or blocked Clean the fins The system pipe is blocked Refer to the dial up of indoor and outdoor unit Measure the swing motor and signal input Measure the fan motor and signal input Remove the obstructions Cover up...

Page 74: ...operate Refer to point 4 of maintenance method for details Malfunction of compressor Compressor can t operate Refer to point 5 of maintenance method for details 1 Air Conditioner Can t be Started up 2 Poor Cooling heating for Air Conditioner 3 Horizontal Louver Can t Swing Possible Causes Discriminating Method Air conditioner Status Troubleshooting No power supply or poor connection for power plug...

Page 75: ...in pipe Replace drain pipe Wrapping is not tight Water leaking from the pipe connection place of indoor unit Wrap it again and bundle it tightly 5 Compressor Can t Operate Possible causes Discriminating method air conditioner status Troubleshooting Wrong wire connection or poor connection Check the wiring status according to circuit diagram Connect wires according to wiring diagram to make sure al...

Page 76: ...oded View and Parts List 10 1 Indoor Unit 2 4 5 6 7 10 11 15 17 20 21 22 40 41 42 35 34 32 30 16 39 38 37 31 33 14 36 8 12 13 29 1 3 9 18 19 23 24 25 26 28 27 B2 panel A3 panel The component picture is only for reference please refer to the actual product ...

Page 77: ...sy 26152028 1 19 Cross Flow Fan 2 10352040 1 20 O Gasket sub assy of Bearing 76512051 1 21 Left Evaporator Support 24212041 1 22 Evaporator Assy 01002000027 1 23 Wall Mounting Frame 01252398 1 24 Right Support of Evaporator 2421204201 1 25 Fan Motor 1501213401 1 26 Pipe Clamp 26112071 1 27 Drainage hose 0523001404 1 28 Fixed Clip Evaporator 02112009 1 29 Cover Plate 2012212402 1 30 Motor Fixed Cli...

Page 78: ...intenance Service Manual The component picture is only for reference please refer to the actual product 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 17 18 19 20 21 22 23 24 25 26 33 34 35 36 37 27 28 31 32 30 29 14 10 2 Outdoor Unit ...

Page 79: ...over 22245003 1 14 Retaining plate 02115006P 1 15 Handle assy 02113109 1 16 Wiring clamp 26115004 1 17 Electric Expansion Valve Sub Assy 07133688 1 18 Temperature Sensor 3900031001 1 19 Rear Grill 01475013 1 20 Condenser Assy 0116349101 1 21 Clapboard 01233134 1 22 Condenser support plate 01175037 1 23 Motor Support Sub Assy 0180287601 1 24 Top Cover Sub Assy 01255007 1 25 Electric Box Cover 01425...

Page 80: ... for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal Steps Procedure 1 Before disassembly of the unit 2 Remove filter panel clasps filter Axonometric drawing for the complete unit Open the panel Loosen the clasps on the filter Draw out two pieces of filter a b c ...

Page 81: ...l 5 Remove horizontal louver clasps panel horizontal louver Remove screws fixing display and then remove the display Pull the clasps at both sides slightly and then remove the panel Remove the axial bush on the horizontal louver and then remove the horizontal louver display B2 panel A3 A5 panel ...

Page 82: ...ic box 7 Remove front case screw top cover of electric box screw cap screw front case Procedure Steps Remove screws fixing the top cover of electric box Remove the top cover of electric box Remove the screw caps on front case Remove screws connecting the front case Remove the front case ...

Page 83: ...re 8 Remove earthing wire 9 Remove electric box cover screw clasp clasp electric box cover Remove earthing screws and then remove the earthing wire Loosen clasps at the left side of electric box Loosen clasps on the right side of electric box Remove electric box cover ...

Page 84: ...al a b c Procedure Steps 10 Remove temperature sensor 11 Remove electric box temperature sensor screw electric box Pull out the indoor temperature sensor Pull out 6 sockets on PCB board Pull out two screws on electric box Remove the electric box ...

Page 85: ...r tray connection position for indoor and outdoor units connection pipe pipe stopping plate screw screw damping board Pull the water tray upwards and then remove the water tray Separate the connection pipe between indoor and outdoor units Remove two screws on pipe stopping plate for indoor unit and then remove the pipe stopping plate Remove 2 screws on damping board and then remove the damping boa...

Page 86: ...ate of motor screw 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 Remove 2 screws on fixing plate of motor and then remove the fixing pate of motor ...

Page 87: ...ation and Maintenance Service Manual a Procedure Steps b c 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 ...

Page 88: ...85 Installation and Maintenance Service Manual a b Procedure Steps 19 Remove cushion rubber cushion rubber Remove the cushion rubber on cross flow blade Remove the cushion rubber from the base ...

Page 89: ...nt side panel Loosen the screws connecting the front side panel and chassis Remove the front side panel Procedure valve 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 1 Remove big handle valve cover and top cover 11 2 Removal Procedure of Outdoor Un...

Page 90: ...e the panel Twist off the screws connecting the grille and panel and then remove the grille 5 Remove right side plate right side plate Twist off the screws connecting the right side plate and chassis valve support and condenser and then remove the right side plate 6 Remove axial flow blade axial flow blade Twist off the nuts on blade with wrench and then remove the axial flow blade Procedure ...

Page 91: ...pliers pull out the wiring terminal pull it upwards to remove the electric box electric box fireproofing Twist off the screws on electric box fireproofing with screwdriver and then remove the electric box fireproofing 8 Remove motor motor Twist off the tapping screws fixing the motor pull out the pin of leading wire for motor and then remove the motor Procedure ...

Page 92: ...he motor support Twist off the screws connecting isolation sheet and end plate of condenser and chassis and then remove the isolation sheet 11 Remove 4 way valve 10 Remove isolation sheet isolation sheet 4 way valve Unsolder the pipeline between compressor condenser gas and liquid valve and then remove the 4 way valve note release all refrigerant before unsoldering Procedure ...

Page 93: ...ng joint wrap the gas valve with wet cloth completely to avoid the damage to valve and release all refrigerant completely at first Unsolder the soldering joint between liquid valve and connection pipe of liquid valve and then remove the liquid valve Twist off the screws connecting valve support and chassis and then remove the valve support 14 Remove compressor compressor 13 Remove valve support va...

Page 94: ... left side plate left side plate Twist off the screws connecting the left side plate and chassis with screwdriver and then remove the left side plate Pull it upwards to separate the chassis and condenser 16 Remove chassis and condenser chassis condenser Procedure ...

Page 95: ...82 4 28 66 67 66 2 19 75 76 75 2 24 84 85 84 2 29 68 68 20 77 77 25 86 86 30 1 Standard length of connection pipe 5m 7 5m 8m 2 Min length of connection pipe is 3m 3 Max length of connection pipe and max high difference See the specification 4 The additional refrigerant oil and refrigerant charging required after prolonging connection pipe After the length of connection pipe is prolonged for 10m at...

Page 96: ...eps A Cut the pip Confirm the pipe length according to the distance of indoor unit and outdoor unit Cut the required pipe with pipe cutter B Remove the burrs Remove the burrs with shaper and prevent the burrs from getting into the pipe C Put on suitable insulating pipe D Put on the union nut Remove the union nut on the indoor connection pipe and outdoor valve install the union nut on the pipe E Ex...

Page 97: ... 2 358 233 6 0 717 24 8 60 23 95 9 779 165 2 2 28 235 4 0 697 26 6 57 18 96 8 9 382 167 2 206 237 2 0 678 28 4 54 31 98 6 9 003 168 8 2 133 239 0 66 30 2 51 59 100 4 8 642 170 6 2 064 240 8 0 642 32 49 02 102 2 8 297 172 4 1 997 242 6 0 625 33 8 46 6 104 7 967 174 2 1 933 244 4 0 608 35 6 44 31 105 8 7 653 176 1 871 246 2 0 592 37 4 42 14 107 6 7 352 177 8 1 811 248 0 577 39 2 40 09 109 4 7 065 17...

Page 98: ...31 95 13 04 165 2 3 04 235 4 0 93 26 6 76 24 96 8 12 51 167 2 94 237 2 0 904 28 4 72 41 98 6 12 168 8 2 844 239 0 88 30 2 68 79 100 4 11 52 170 6 2 752 240 8 0 856 32 65 37 102 2 11 06 172 4 2 663 242 6 0 833 33 8 62 13 104 10 62 174 2 2 577 244 4 0 811 35 6 59 08 105 8 10 2 176 2 495 246 2 0 77 37 4 56 19 107 6 9 803 177 8 2 415 248 0 769 39 2 53 46 109 4 9 42 179 6 2 339 249 8 0 746 41 50 87 111...

Page 99: ... 8 342 8 77 49 19 147 2 10 54 217 4 3 04 8 6 323 9 78 8 47 08 149 10 18 219 2 2 955 10 4 306 2 80 6 45 07 150 8 9 827 221 2 872 12 2 289 6 82 4 43 16 152 6 9 489 222 8 2 792 14 274 84 2 41 34 154 4 9 165 224 6 2 715 15 8 259 3 86 39 61 156 2 8 854 226 4 2 64 17 6 245 6 87 8 37 96 158 8 555 228 2 2 568 19 4 232 6 89 6 36 38 159 8 8 268 230 2 498 21 2 220 5 91 4 34 88 161 6 7 991 231 8 2 431 23 209 ...

Page 100: ...0 Visit us at www lennox com or contact us at 1 877 726 0024 by Lennox Industries Inc please visit www lennox com 2014 Lennox Industries Inc For a complete list of the registered and common law trademarks owned ...

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