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Related Manuals for Lennox LM012CI-100V433
Summary of Contents for Lennox LM012CI-100V433
- Page 1 Air Conditioner Service Manual Service Manual Models: LM012CI-100V433 / LM012CO-100V433 LM012CI-100P433 / LM012CO-100P433 LM018CI-100P433 / LM018CO-100P433 LM024CI-100P433 / LM024CO-100P433 LM036CI-100P433 / LM036CO-100P433 (Refrigerant R410A) Thank you for selecting LENNOX air conditioners.
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Page 2: Table Of Contents
Air Conditioner Service Manual CONTENTS PART Ⅰ TECHNICAL INFORMATION ............................. 3 1. I ..................................3 MPORTANT OTICE 2. R ..............................4 EFRIGERATION CYCLE DIAGRAM 3. E ..................................5 LECTRIC IAGRAM 3.1 Wiring diagram ................................5 3.2 PCB LAOUT ..................................7 4. -
Page 3: Part Ⅰ Technical Information
Air Conditioner Service Manual Part Ⅰ Technical Information 1. Important Notice This service manual is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair the appliance may result in personal injury and property damage. -
Page 4: Refrigeration Cycle Diagram
Air Conditioner Service Manual 2. Refrigeration cycle diagram Cool only... -
Page 5: Electric Diagram
Air Conditioner Service Manual 3. Electric Diagram 3.1 Wiring diagram MODEL：LM012CI-100V433 / LM012CO-100V433, LM012CI-100P433 / LM012CO-100P433, LM018CI-100P433 / LM018CO-100P433 INDOOR UINT: OUTDOOR UNIT:... - Page 6 Air Conditioner Service Manual MODEL：LM024CI-100P433 / LM024CO-100P433, LM036CI-100P433 / LM036CO-100P433 INDOOR UINT: OUTDOOR UNIT:...
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Page 7: Pcb Laout
Air Conditioner Service Manual 3.2 PCB LAOUT Note: the PCB type is printed on the PCB, please inquire the PCB layout via the PCB type information. Indoor unit 9K, 12K, 18K PCB type: A010268 9 10 ODU AC power output Fuse Transformer out IDU AC power input... - Page 8 Air Conditioner Service Manual 9K, 12K, 18K PCB type: A010235 ODU AC power output Fuse ODU AC power input AC motor driver IDU/ODU wiring connection-N connector Power supply-N connector Left-Right swing connector Up-Down swing connector AC Motor feedback Display Emergency button Temperature sensor connector Trans former IN Trans former OUT...
- Page 9 Air Conditioner Service Manual Top view PCB type: A010422 Trans former IN ODU AC power output Fuse ODU AC power input AC motor driver IDU/ODU wiring connection-N connector Power supply-N connector Left-Right swing connector Up-Down swing connector AC Motor feedback Emergency button Temperature sensor connector...
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Page 10: Electronic Controller Introduction
Air Conditioner Service Manual 4. Electronic Controller Introduction 4.1 Electronic controller RT-------Room Temperature. IPT------Indoor Pipe (Coil) Temperature. ST------Indoor Setting Temperature. OPT--- Outdoor Pipe Temperature. CRT--- Compensated Room Temperature. IDU--- Indoor unit ODU--- Outdoor unit. Note: When AC finishing installation, because of the air ventilation and the distance of temperature test sensor to different location of the house, the temperature for IDU PCB control need compensation. - Page 11 Air Conditioner Service Manual 2). When switch on unit on cooling mode, ODU fan motor will delay 5s after compressor starts up. 4.1.2.4. When ODU failure or stops for protection, IDU works as preset. 4.1.2.5. Anti-frosting protection While condition a), b) matched, the AC unit transferred to anti-frosting protection. a).
- Page 12 Air Conditioner Service Manual c. changed to fan mode. 4). Under normal operation, the compressor can be stopped by program until it works for 6 min at least once starts 5). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure. 4.1.4.3.
- Page 13 Air Conditioner Service Manual 2). Vane blade operation for cold air prevention. If the vane works on status of non-swing: While IPT increase to a special degree, the vane blade will change the position to: ① Default angle; or ② Previous position; or ③...
- Page 14 Air Conditioner Service Manual 4.1.8 Emergency switch When the EMERGENCY switch is pressed one time, COOLING mode is selected and if it pressed again within 3s, HEATING mode selected, while press once again, the unit will be switched off. When the remote controller out of function, batteries lost power, for example, the EMERGENCY button in the front of indoor unit can be used for function test.
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Page 15: Part Ⅱ Installation And Maintenance
Air Conditioner Service Manual PART Ⅱ Installation and Maintenance 1. Notes for installation and maintenance Safety Precautions Important! Please read the safety of precautions carefully before installation and maintenance. The following contents are very important for installation and maintenance. Please follow the instructions bellow. ●... - Page 16 Air Conditioner Service Manual 6) Make sure no foreign objects are left in the unit after finishing installation. Improper installation may lead to fire hazard, explosion, electric shock or injury. Safety precautions for Installing and Relocating the unit. To ensure safety, please be mindful of the following precautions. Warnings When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant.
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Page 17: Installation
Air Conditioner Service Manual 2 Installation 2.1 Installation Dimension Diagram Space to the wall At least 15cm At least 15cm Space to the wall Space to the obstruction Space to the floor Space to the obstruction Drainage pipe Connecting wire... -
Page 18: Accessory
Air Conditioner Service Manual 2.2 Accessory Remote controller Remote controller Batteries Vinyl tape supporter Drain hose Screw Insulation material Hole cover... -
Page 19: Position
Air Conditioner Service Manual picture. 2.3 Position Indoor unit 2.4 Electricity and wiring Safety precaution Install the indoor unit level on a strong wall that 1） Must follow the electric safety regulations when is not subject to vibrations The inlet and outlet ports should not be installing the unit. - Page 20 Air Conditioner Service Manual 9K(770X) The hole must slope downwards towards the exterior. Note: Keep the drain pipe down towards the direction of the wall hole, otherwise leakage may occur. 2.5.3 Electrical connections---Indoor unit 1).Lift the front panel. 12K(770X) 2).Take off the cover as indicated in the picture (by removing a screw or by breaking the hooks).
- Page 21 Air Conditioner Service Manual Wrap the insulation material around the connecting portion. Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap. Shape the connection pipe 2.5.4 Connecting the pipes.
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Page 22: Odu Installation
Air Conditioner Service Manual Pay attention that water is drained in a suitable place. Insert the pipe connection into the relative slot. Press to join the pipe connection to the base. Electronic connections 1. Take the cover away. 2. -
Page 23: Vacuum And Gas Leakage Test
Air Conditioner Service Manual 2.7 Vacuum and gas leakage test 2.8 Final test 1. Use vacuum Pump 1 Preparation of test operation. The client approves the air conditioner 1) Air and humidity left inside the refrigerant circuit can cause compressor malfunction. After having installation. -
Page 24: Maintenance
Air Conditioner Service Manual 3. Maintenance 3.1 Failure code Code Reason Remark IDU Room Temperature sensor failure. IDU sensor and PCB. （IDU RT failure） IDU Coil temperature sensor failure.（IDU IDU sensor and PCB. IPT failure） Gas not enough Please check the pressure in cooling System protection For the high/low pressure valve model IDU PG Fan motor / DC fan motor works... -
Page 25: Trouble Shooting
Air Conditioner Service Manual 3.2 Trouble shooting 3.2.1 E1, E2 ---IDU Room temperature sensor and/or coil temperature sensor failure. Start Display E1or E2 Is the sensor well Re-connect connected to PCB E1/E2 disappear? Multi-meter check the Replace the sensor sensor, is it open or short circuit? The malfunction eliminated? - Page 26 Air Conditioner Service Manual 3.2.2 E6----IDU ventilation failure (PG and DC fan motor only) Start Display E6 Turn the fan blades by hand while power-off condition Adjust the motor and blade Can the fan blades run assembly so that rotor can smoothly? run smoothly.
- Page 27 Air Conditioner Service Manual 3.2.3 P7---Overheating protection on Cooling mode ℃ On heating mode, when IDU evaporator coil temperature IPT≥62 , ODU PCB will switch off outdoor unit and show P7 failure code. Display P7 ODU fan motor Fan motor Replace fan motor works normal? broken?
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Page 28: Disassembly Idu & Odu
Air Conditioner Service Manual 4. Disassembly IDU & ODU 4.1. IDU Disassembly Steps Reference photo 1. Before disassembly The orginal status. 2. Disassembly front panel, display board and WIFI module. 显示盒 Display box A. Open front panel. B. Remove one screw and take the display box out from the panel. - Page 29 Air Conditioner Service Manual 4. Remove the electric control box cover Unfix one screw on the cover of electric 固 box, and remove the cover. 定 螺 screw 钉 5. Remove the filter Push the filter upwards a little, you can take it out from unit.
- Page 30 Air Conditioner Service Manual 7. Disassembly the electric control box. 电控盒 Electric control box A. Remove the RT & IPT out from evaporator; B. Unscrew all the earth ground wirings on the evaporator. C. Take all the connectors out from PCB. D.
- Page 31 Air Conditioner Service Manual 9. Disassembly the evaporator screws Screws + motor 螺钉/卡扣 螺钉 A. Unfix 2 screws of left side shown as cover picture. B. Unfix 2 screws of right side on motor cover/right support plate. C. Take the evaporator out from unit by uplifting the IUPUT/OUTPUT pipes slightly.
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Page 32: Odu Assembly
Air Conditioner Service Manual 4.2 ODU Assembly Step Reference picture step1：Remove the PCB Cover , valve Cover and top cover 1). Unfix one screw on the PCB cover, you can take the cover out from unit. 2). Unfix one screw on the valve cover, you can take it out easily. - Page 33 Air Conditioner Service Manual ODU middle separate plate and base plate, uplift front panel you can take it out from unit. step3：Disassemble the Left and Right plate. Unfix screws btw Right Plate and the Electric Box assembly, Valve Plate , Base Plate, then you can take the Right plate out.
- Page 34 Air Conditioner Service Manual step4：Disassemble the Axis Fan Blade Unscrew the fan blade nut, and take the blade out. step5：Disassemble the electric box Unfix screw btw Electric Box and motor supporter etc. loosen the wiring clamp, then you can take the control box out.
- Page 35 Air Conditioner Service Manual step7：Disassemble the Partition plate Unfix the screw btw Partition plate and unit, and take it out step8：Disassemble the 2 and 3-way valve Unfix screw btw Valve plate and base, you can take the 2-way and 3-way valve out by welding.
- Page 36 Air Conditioner Service Manual step10：Disassemble the compressor. Unscrew the nuts and take the compressor out. step11：Remove the fan motor and fan supporter. Unfix screws btw fan motor with supporter, and supporter with base plate. Note: Pay attention to the motor wiring, it can’t be taken out by force.
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Page 37: Appendix
15 meters Max. In do o r unit Outdoor unit Refrigerant piping Additional refrigerant Max. length (m) charging: Xg= B * (A-5m) Mode Standard length (m) LM012CI-100V433 / 20g/m LM012CO-100V433 LM012CI-100P433 / 20g/m LM012CO-100P433 LM018CI-100P433 / 30g/m LM018CO-100P433 LM024CI-100P433 /... -
Page 38: Appendix 3 Pipes Flaring
Air Conditioner Service Manual Appendix 3 Pipes Flaring Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. A. Cut the pipes and the cable. 1) Use the piping kit accessory or the pipes purchased locally. 2) Measure the distance between the indoor and the outdoor unit. -
Page 39: Appendix 4 Thermistor Temperature Characteristics
Air Conditioner Service Manual Appendix 4 THERMISTOR TEMPERATURE CHARACTERISTICS 1). Indoor unit and outdoor exchange temperature and outside air temperature sensor temperature characteristics TEMP. Resistance Voltage of TEMP. Resistance Voltage of TEMP. Resistance Voltage of (℃) (k Ohm) resistance (℃) (k Ohm) resistance (℃) - Page 40 Air Conditioner Service Manual Resistance at 25℃: 5 kΩ. TH1: indoor room temperature sensor and outside air temperature sensor TH2: indoor exchange temperature sensor and outside exchange temperature sensor Before measuring resistance, disconnect connectors as shown above. 1) Outdoor unit sensor temperature characteristics TEMP.
- Page 41 Air Conditioner Service Manual 66.96 74.11 81.96 6.548 6.912 7.289 1.105 1.153 1.202 63.74 70.48 77.87 6.309 6.655 7.013 1.073 1.12 1.168 60.69 67.05 6.08 6.409 6.748 1.042 1.089 1.136 57.81 63.8 70.34 5.861 6.173 6.495 1.013 1.058 1.104 55.08 60.72 66.88 5.651...