TCL TAC-09CSD/XA81I Service Manual
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TCL TAC-09CSD/XA81I Service Manual

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TCL Air Conditioner Service Manual 
Inverter air conditioner
Service Manual
Models
TAC-09CSD/XA81I
TAC-12CSD/XA81I
TAC-18CSD/XA81I
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Summary of Contents for TCL TAC-09CSD/XA81I

  • Page 1 TCL Air Conditioner Service Manual  Inverter air conditioner Service Manual Models TAC-09CSD/XA81I TAC-12CSD/XA81I TAC-18CSD/XA81I...

  • Page 2: Table Of Contents

    TCL Air Conditioner Service Manual  CONTENTS Part Ⅰ Technical Information ..........................3   1. Important Notice ............................ 3 2. Refrigeration cycle diagram .......................... 4 3. Electric Diagram ............................ 5 3.1 Wiring diagram ............................. 5  3.2 PCB LAOUT ............................ 7  4. Electronic Controller Introduction  ........................  1 1 4.1 Electronic Controller ..........................  1 1  PART Ⅱ Installation and Maintenance ......................... 18  ...

  • Page 3: Part Ⅰ Technical Information

    TCL 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

    TCL Air Conditioner Service Manual  2. Refrigeration cycle diagram Cool only Liquid side 2-way valve Capillary Heat exchange Heat exchange (Evaporator) (condenser) Gas side 3-way valve Accumulator Compressor Liquid side 2-way valve Electronic expansion valve Heat exchange Heat exchange (Condenser)

  • Page 5: Electric Diagram

    TCL Air Conditioner Service Manual  3. Electric Diagram 3.1 Wiring diagram INDOOR UNIT：TAC-09CSD/XA81I TAC-12CSD/XA81I OUTDOOR UNIT: TAC-09CSD/XA81I TAC-12CSD/XA81I...
  • Page 6 TCL Air Conditioner Service Manual   INDOOR UNIT：TAC-18CSD/XA81I OUTDOOR UNIT: TAC-18CSD/XA81I...

  • Page 7: Pcb Laout

    TCL Air Conditioner Service Manual  3.2 PCB LAOUT (Only for reference) Indoor unit A010268 9 10 Transformer IN ODU AC power output Transformer OUT Fuse ODU AC power input AC fan motor driving IDU/ODU wiring connection --N connector Power supply --N connector...
  • Page 8 TCL Air Conditioner Service Manual    A010403 A010412  ...
  • Page 9 TCL Air Conditioner Service Manual    A010283 Outdoor unit 9K, 12K A010313 Mainly relay Fuse L, N & 1 (communication) wiring 4-way valve Heater motor connector Electronic expansion valve Discharge sensor connector OAT/OPT sensor connector LED5  ...
  • Page 10 TCL Air Conditioner Service Manual    A010386 18,24K A010286 DRED(OPTION) OAT/OPT connector Discharge sensor connector Electronic expansion valve AC/DC motor connector Heater 4-way valve LED5 Communication wiring Fuse L , N line Mainly relay LED1-LED4 Note: OAT: Outdoor Ambient Temperature OPT: Outdoor pipe temperature  ...

  • Page 11: Electronic Controller Introduction

    TCL 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. OAT---Outdoor Ambient Temperature. ODT---Outdoor Discharge Temperature. CRT---Compensated Room Temperature. IDU--- Indoor unit ODU---Outdoor unit.
  • Page 12 TCL Air Conditioner Service Manual     5. Anti-frosting protection Control the unit operation frequency and the frequency changing rate to achieve anti-frosting protection. 1). Frequency Slowly Increasing(FSI): a. If 6℃≤IPT＜7 ℃ , the frequency increasing rate is 1Hz/60s, slowly increasing operation speed.
  • Page 13 TCL Air Conditioner Service Manual     6). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure. 3. IDU time delay: When compressor stops or unit switches off while in heating mode, IDU fan motor will work for a few seconds more to prevent overheat.
  • Page 14 TCL Air Conditioner Service Manual     COMPRESSOR 4-way VALVE OUTDOOR FAN Defrosting max time Defrosting end off: Compressor stops working, and re-starts to working after 50s delay; 7. Cold air prevention:  This function intends to prevent cold air from being discharged when the heating operation starts up  1). IDU fan motor cold air prevention  .When  RT＜24℃:  a. If ITP＞31℃  while compressor works for 5 min, fan motor will work according to preset fan speed.    b. If IPT≤31℃, fan motor stops working while compressor operation within 2min, if IPT≥27℃, fan motor works in low  speed 2 min, then change to preset speed.  When RT≥24℃:   ...
  • Page 15 TCL Air Conditioner Service Manual     4). Set other function as MODE, FAN SPEED, SWING etc. 5). Press TIMER ONCE AGAIN to confirm the TIME ON setting TIMER OFF 1). TIMER OFF can be set only when the air conditioner is ON.
  • Page 16 TCL Air Conditioner Service Manual     The failure and times for protection will eliminate immediately once the unit to be switched off, on fan mode or changed to be heating mode from others. Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
  • Page 17 TCL Air Conditioner Service Manual     code as IDU/ODU communication failure. Once the IDU & ODU communication recovery, and also the compressor stopped for 3 min already, can the unit be recovered to operate.        ...

  • Page 18: Part Ⅱ Installation And Maintenance

    TCL 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 19 TCL Air Conditioner Service Manual    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.
  • Page 20 TCL Air Conditioner Service Manual     Introduction R32, R290 air conditioner installation 1) Introduction to Refrigerants R32 & R290 The refrigerants used for air conditioners are environmentally friendly hydrocarbons R32 and R290. The two kinds of refrigerants are combustible and odorless. Moreover, they can burn and explode under certain condition.
  • Page 21 TCL Air Conditioner Service Manual     Caution:  Please contact the nearest after-sale service center when maintenance is necessary. At the time of maintenance, the maintenance personnel must strictly comply with the Operation Manual provided by the corresponding manufacturer and any non-professional is prohibited to maintain the air conditioner.
  • Page 22 TCL Air Conditioner Service Manual     station and it is prohibited to weld the refrigerant pipe or conduct other operations on the user’s site.  It is necessary to choose the place where the inlet and outlet air of the indoor unit is even.
  • Page 23 TCL Air Conditioner Service Manual     professional equipment recommended by the air conditioner manufacturer.  Check the refrigerant leak detector whether has been calibrated. The set maximum alarm concentration of the refrigerant leak detector should not exceed 25% of the lower explosion limit (LEL), the refrigerant leak detector must be working during maintenance.
  • Page 24 TCL Air Conditioner Service Manual      The main power switch should be set outside the maintenance location and equipped with protective (explosion-proof) devices.  It is necessary to provide firefighting devices such as dry powder or carbon dioxide fire extinguisher appropriate for extinguishing the electrical fire and keep such firefighting devices in a usable condition.
  • Page 25 TCL Air Conditioner Service Manual     A maintenance station should establish emergency handling plans. It is necessary to take appropriate precautionary measures in work. For example, it is prohibited to enter the location with any kindling material and it is prohibited to wear clothing or shoes which easily produce static.

  • Page 26: 2 Installation

    TCL 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 27: Accessory

    TCL Air Conditioner Service Manual    2.2 Accessory Remote controller Remote Batteries Vinyl tape controller supporter Drain hose Hole cover Screw Insulation material 2.3 Tools Picture Picture Picture Tool name Tool name Tool name Standard Pipe Vacuum Pump  Wrench Cutter  ...

  • Page 28: Position

    TCL Air Conditioner Service Manual     1） Must follow the electric safety regulations when 2.4 Position installing the unit. Indoor unit 2） According to the local safety regulations, use  Install the indoor unit level on a strong wall that is qualified power supply circuit and air switch.
  • Page 29 TCL 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. 1.6.3 Electrical connections---Indoor unit 1).Lift the front panel.
  • Page 30 TCL 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.

  • Page 31: Odu Installation

    TCL Air Conditioner Service Manual    through the drain pipe. the drain pipe. 1) Fasten the drain port in the 25mm hole placed in the part of the unit as shown in the picture. 2) Connect the drain port and the drain pipe.

  • Page 32: Vacuum And Gas Leakage Test

    TCL Air Conditioner Service Manual     2.8 Vacuum and gas leakage test 2.9 Final test 1. Use vacuum Pump 1 Preparation of test operation. 1) Air and humidity left inside the refrigerant circuit can  The client approves the air conditioner cause compressor malfunction.

  • Page 33: Maintenance

    TCL Air Conditioner Service Manual     3. Maintenance 3.1 Failure code Code Reason Remark IDU & ODU Communication failure The IDU & ODU wiring connection correct? IDU Room Temperature sensor failure.（IDU IDU sensor and PCB. RT failure） IDU Coil temperature sensor failure.（IDU IPT IDU sensor and PCB.
  • Page 34 TCL Air Conditioner Service Manual     Cooling system gas flow abnormal Please check the troubleshooting for detail. PROTECTION. PFC PROTECTION Please check the troubleshooting for detail. The Compressor lack of phase / Anti-phase Please check the troubleshooting for detail.

  • Page 35: Trouble Shooting

    TCL Air Conditioner Service Manual    3.2 Trouble shooting 3.2.1 E0 ---IDU & ODU communication failure Start Display E0 IDU wiring Check and E0 disappear? connection correct ? re-connect Check communication, Replace/ E0 disappear? earth wiring and the re-connect connection, in good condition? ODU wiring ...
  • Page 36 TCL Air Conditioner Service Manual     3.2.2 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...
  • Page 37 TCL Air Conditioner Service Manual     3.2.3 E4 --- AC Cooling system abnormal (Gas not enough) Start Display E4 Check the pressure AC pressure correct? Check the sensor short or (cooling:0.8-1.3Mpa,/ open? heating 2.0-3.6Mpa) Replace the sensor Check the valves open or...
  • Page 38 TCL Air Conditioner Service Manual     3.2.4 E6----IDU ventilation failure (PG and DC fan motor only) Start Display E6 Turn the fan blades by hand while power-off Adjust the motor and blade Can the fan blades run assembly so that rotor can smoothly? run smoothly.
  • Page 39 TCL Air Conditioner Service Manual     3.2.5 E3, E7 or E8----ODU Coil temperature sensor, Ambient temperature sensor or Discharge temperature sensor failure. When any of the sensor resistance open or short circuit , unit will display failure code as E3/E7 or E8, IDU and ODU turns off.
  • Page 40 TCL Air Conditioner Service Manual     3.2.6 E9---ODU IPM /Compressor drive fault If unit have 6 times stopping works for IPM protection (P0) continuously, it will display E9 error, and unit can’t be recovered to operation, except press ON/OFF button.
  • Page 41 TCL Air Conditioner Service Manual     3.2.7 EF---ODU DC fan motor failure Shut off Check the fan blade by Re install the DC motor hand, can it rotate freely Works normal? Fan motor well Re-connect connect to PCB Works normal? 1.
  • Page 42 TCL Air Conditioner Service Manual     3.2.8 EU---ODU voltage test sensor failure After power relay works, when tested voltage effective value less than 50V for 3s continuously, unit will display EU. Start Display EU Test voltage btw ODU Check while voltage...
  • Page 43 TCL Air Conditioner Service Manual     3.2.9 P0---IPM protection When overheat or overcurrent for IPM, AC unit will display P0protection. Display P0 Restart unit. It works normal? Wiring connection Re-connect U/V/W correct? P0 disappear? ODU fan motor no Replace ODU...
  • Page 44 TCL Air Conditioner Service Manual     3.2.10 P1--- Over / under voltage protection 1. Test voltage between L &N, When the power supply V＞AC260V or V＜AC150V, AC will display P1 protection, unit will recover back to previous status while V＞AC155V.
  • Page 45 TCL Air Conditioner Service Manual     3.2.11 P2---Over Current protection When the AC unit running current more than I , it will stop and display P2 protection. Note: for different AC model, I has difference valve. Display P2 ODU fan motor...
  • Page 46 TCL Air Conditioner Service Manual     3.2.12 P4 ---ODU Discharge temperature overheating protection Display P4 ODU temperature Normal protection higher than 60 ℃? ODU location Adjust ODU Enough space for Unit operate? acceptable? installation ventilation? Condenser too Clean IDU filter or...
  • Page 47 TCL Air Conditioner Service Manual     3.2.13 P5---Sub-cooling protection on Cooling/Dry mode On Cooling or Dry mode, when IDU evaporator coil temperature IPT＜1℃ continuously for 3 min after compressor start up for 6 min, CPU will switch off outdoor unit and show P5 failure code.
  • Page 48 TCL Air Conditioner Service Manual     3.2.14 P6---Overheating protection on Cooling mode On Cooling or Dry mode, when ODU condenser coil temperature OPT≥62℃ , MCU will switch off outdoor unit and show P6 failure code. Display P6 ODU fan motor...
  • Page 49 TCL Air Conditioner Service Manual     3.2.15 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...
  • Page 50 TCL Air Conditioner Service Manual     3.2.16 P8---Outdoor Overtemperature/Under-temperature protection When environment temperature as below condition, the compressor will stop working, after 200s delay, the IDU will show P8 failure code. (1). On Cooling or Dry mode: ODU ambient temperature: OAT＜-20℃ or OAT＞63℃;...
  • Page 51 TCL Air Conditioner Service Manual     3.2.17 P9---The compressor driving protection (the compressor load abnormal) When compressor start up or in the process of operation, if: (1). MCU can’t test the feedback signal from compressor, or (2). Tested a abnormal signal from compressor, or (3).
  • Page 52 TCL Air Conditioner Service Manual     3.2.18 F4---Cooling system Gas flow abnormal protection When compressor startup, unit will check the variation of IDU coil temperature. If there is mistake installer forgetting to open the 2-way or 3-way valve on ODU, the gas can’t flow in the cooling system, it will show F4 protection.
  • Page 53 TCL Air Conditioner Service Manual     3.2.19 F5---PFC Protection PFC Overcurrent protection F5 Code Check the power supply, Display F5 by is it abnormal? (this is random? normal protection) Display F5 frequently Switch off the unit for 3 Still F5?
  • Page 54 TCL Air Conditioner Service Manual     3.2.20 F6 The Compressor Lack of phase / Anti-phase protection. If ODU PCB can’t test one, or even three phase of compressor current, it will show F6 protection. Display F6 Check compressor Re-connect...
  • Page 55 TCL Air Conditioner Service Manual     3.2.21 F7---Module temperature protection. IPM overtemperature protection, when IPM temperature more than 95℃, it will show F7. Display F7 Clean or adjust the gap IPM well contact to Any dust or gap btw...
  • Page 56 TCL Air Conditioner Service Manual     3.2.22 F8---4-Way Value Reversing abnormal On heating mode, if IDU Coil temperature tested lower than Room temperature 5℃ or even more after compressor works for 8min, unit will show F8 code. Display F8...
  • Page 57 TCL Air Conditioner Service Manual     9.2.23 Fy--- Gas leakage protection After compressor works in high frequency for 9 min, if the temperature on IDU evaporator & ODU condenser has only a little variation comparing previous, but, the compressor discharge temperature on high level, then the unit will show Fy failure code.

  • Page 58: Disassembly Idu & Odu

    TCL 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 displa box out from the panel.  C. Release panel axis which shown in re arrows  out  from  middle  frame  and  tak the panel out.  D. Unscrew and take the WIFI module ou from middle frame.   ...
  • Page 59 TCL Air Conditioner Service Manual     4. Remove the electric control box cover  Unfix  one  screw  on  the  cover  of  固 electric box, and remove the cover.    定 The    螺 Fix    screw  钉   5. Remove the filter    Push the filter upwards a little, you can  take it out from unit.        6. Disassembly the middle frame.    Clasps 插扣 A. Open  the  screw  cover,  and  unfix ...
  • Page 60 TCL 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.  Unfix  one  screw  of  the  control  box ...
  • Page 61 TCL 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.          10. Remove the MOTOR COVER      螺钉 screws Unfix 4 screws on the motor cover with  base frame.         ...

  • Page 62: Odu Assembly

    TCL 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...
  • Page 63 TCL 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...
  • Page 64 TCL 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 65 TCL Air Conditioner Service Manual     Shown as picture to take the cotton out step7：Disassemble the separate plate Unfix the screw btw separate plate and unit, and take it out   step8：Disassemble the 2 and 3-way valve    ...
  • Page 66 TCL Air Conditioner Service Manual     Unfix screw btw Valve plate and base, you can take the 2-way and 3-way valve out by welding. Note: 1). The welding can only place while no gas in the unit. 2). Pay attention to the fire to prevent any injury.
  • Page 67 TCL Air Conditioner Service Manual     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.

  • Page 68: Appendix

    TCL Air Conditioner Service Manual   APPENDIX Appendix 1 The comparison table of Celsius-Fahrenheit temperature Fahrenheit Fahrenheit Fahrenheit Celsius Celsius Celsius diplay Fahrenheit diplay Fahrenheit diplay Fahrenheit temperature ℃ temperature ℃ temperature ℃ (℉) (℉) (℉) (℉) (℉) (℉) 60.8 69/70 69.8...

  • Page 69: Appendix 3 Pipes Flaring

    TCL 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.

  • Page 70: Appendix 4 Thermistor Temperature Characteristics

    TCL 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 ℃ ℃...
  • Page 71 TCL Air Conditioner Service Manual    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. Outdoor unit sensor temperature characteristics TEMP.
  • Page 72 TCL Air Conditioner Service Manual    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 5.947 6.253 0.9833 1.028 1.074...

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Tac-12csd/xa81iTac-18csd/xa81i

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