Page 1: Table Of Contents
Air Conditioner Service Manual Inverter air conditioner Service Manual Models TAC-12CHSA/JAI TAC-18CHSA/JAI TAC-24CHSA/JAI CONTENTS 1. Important Notice Product Dimensions Refrigeration cycle diagram Operation details Wiring diagram Explosion view and parts Precaution Names of parts Installation Trouble shooting...
Page 2: Important Notice
Air Conditioner Service Manual 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. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
Page 3: Product Dimensions
Air Conditioner Service Manual 2. Product Dimensions Indoor Unit: Outdoor Unit: Model 439.2 277.8 327.5 1033...
Page 4: Refrigeration Cycle Diagram
Air Conditioner Service Manual 3. Refrigeration cycle diagram Cooling only Liquid side 2-way valve Capillary Heat exchange Heat exchange (Evaporator) (condenser) Gas side 3-way valve Accumulator Compressor Heat pump Check valve Liquid side 2-way valve Capillary Assembly Heat exchange Heat exchange (Evaporator) (condenser) Gas side...
Page 5: Operation Details
Air Conditioner Service Manual 4. Operation details Remote controller Used to star and stop operation when pressed. SL EEP T IM ER O N T MIE R OF F Used to adjust airflow direction FEEL AUT O C OO L H I GH M ID LO W...
Page 6 Air Conditioner Service Manual Electronic Controller Safety Protection (1) Time Delay for Safety protection 3 minutes delay for compressor ---The compressor is ceased for 3minutes before restarting to balance the pressure in the refrigeration cycle in order to protect the compressor. (2) Discharge temperature protection There is a temperature sensor on top of compressor, when the temperature exceed the limit, system control will shut down compressor and IDU display board shows error code E8.
Page 7 Air Conditioner Service Manual ℃ maximum adjustment is RT±2 4.3 Cooling Mode (1) Compressor frequency control. According to the difference of Room Temperature and Set Temperature (δt = RT-ST), running frequency of the compressor is controlled by electronic controller. When room temperature is much higher than set temperature, the compressor will start at a high frequency, and while the room temperature goes down, the compressor running frequency decline to lower value.
Page 8 Air Conditioner Service Manual 4.4 DRY Mode (1) The compressor, ODU fan motor operate the same cycle as Cooling mode. (2) When the system operates in Dry mode, at first it operates in cooling mode, the set temperature ST=RT-2℃ constant, the system operates in low fan speed. During the course of process, the fan speed can’t be adjusted by remote controller, but you can control the vane direction.
Page 9 Air Conditioner Service Manual for another 30 seconds since the compressor stopped. 2) Auto fan control (heating) δ In heating mode (include in FEEL mode) , fan speed is determined by t as the following: ST-RT δt come down δt come up 4℃...
Page 10 Air Conditioner Service Manual In defrosting, LED showing by winking. No matter AC come into or out of defrosting, indoor fan motor speed is the same as Cold Air Prevention C ontrol. While one of the following conditions satisfied, unit comes out of defrosting and shifts to heating mode: a.
Page 11 Air Conditioner Service Manual To activate or cancel the Auto-restart function: Press the SLEEP button 10 times within 8 second while air conditioner on operating state: 1). If the Auto-restart function to be turned off before, then it will be activated after press SLEEP as above, and the buzzer BEEPs three times;...
Page 12 Air Conditioner Service Manual Outdoor failure display There is a LED on outdoor power board, it blinks 1s ON and 1s OFF while compressor standby and it light constantly (ON) while compressor running; If there is failure happened on ODU, The indicator (LED) alerts the fault in a cycle as such that it light for 0.5 seconds ON, 0.5 seconds OFF, blinks “n”...
Page 13: Wiring Diagram
5、Wiring Diagram TAC-12CHSA/JAI...
Page 14 TAC-18CHSA/JAI...
Page 15 TAC-24CHSA/JAI...
Page 16 TCL Air Conditioner Service Manual Indoor Unit-TAC-12CHSAJAI Part No. Part Name Q’ty Remark 1080030008 Installation Plate 1080320806 Base 1070321035 Vertical Vane Assembly 1070020026AA Cross Fan 1070100010 Bearing Mount 211205800F Evaporator 1070321678AA Face Frame 1070321022AA Screw Cover 1070320109 Air Filter Display PCB Box 210901498 Display PCB 1070322516...
Page 17 Air Conditioner Service Manual Outdoor unit_TAC-12CHSAJAI Part No. Part Name Q’ty Remark 1071990039 Back Grille 1080320105 Top cover 211202396AA Condenser 1080050004 Outdoor motor supporter 1170040058H Outdoor motor 1070030050AA Propeller fan 1080050001 Left grille supporter 1080320113 Front plate 1080320112 Fan guard 211232796 Capillary assembly 211206855...
Page 18 Air Conditioner Service Manual Indoor Unit- TAC-18CHSAJAI Part No. Part Name Q’ty Remark 1080030021 Installation Plate 1070350872AA Base 1070020024AA Cross Fan 1070100010 Bearing Mount 1110050889 Evaporator 1070450386 Water Drainage Assembly 1070350141 Vertical Vane Assembly A 1070450900AA Face Frame 1073073233 Screw Cover 1070450397 Air Filter Display PCB Box...
Page 19 Air Conditioner Service Manual Outdoor unit-TAC-18CHSAJAI Part No. Part Name Q’ty Remark 1071990040 Black Grille 1080050011 Top cover 211232538B Condenser 1080050004 Outdoor motor supporter 1170040149 Outdoor motor 1070030050AA Propeller fan 1080050001 Left grille supporter 1080050009 Front plate 210800814 Fan guard 211232539 Capillary Assembly 211202953...
Page 20 Air Conditioner Service Manual Indoor Unit- TAC-24CHSAJAI Part No. Part Name Q’ty Remark 1080030001 Installation Plate 1080320810 Base 1070020014AA Cross Fan 1070100010 Bearing Mount 211206151G Evaporator 1070701049 Water Drainage Assembly 1070701050 Vertical Vane Assembly A 1070701051 Vertical Vane Assembly B 1070701060AB Face Frame 1073073232...
Page 21 TCL Air Conditioner Service Manual Indoor Unit- TAC-24CHSAJAI Part No. Part Name Q’ty Remark 1083520101 Back Grille 1081990056 Top cover 211230399 Condenser 1081990060 Outdoor motor supporter 1170040169 Outdoor motor 1070030054AB Propeller fan 1081990053 Left grille supporter 1081990058 Front plate 1081990059 Fan guard 1120520685 Capillary assembly...
Page 22: Precaution
Air Conditioner Service Manual 7. Precaution 7.1 SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLATION  Read this guide before installing and using the appliance.  During the installation of the indoor and outdoor units the access to the working area should be forbidden to children.
Page 23 Air Conditioner Service Manual sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
Page 24 Air Conditioner Service Manual and caution are therefore always recommended for installation, operation and maintenance.  Ensure that the appliance is disconnected from the power supply when it will remain inoperative for a long period and before carrying out any cleaning or maintenance. ...
Page 25: Names Of Parts
Air Conditioner Service Manual 8.Names of parts INDOOR UNIT Indoor unit 2-3 4 Name Front panel Air filter Special filter(option) Display PCB Vertical vane Horizontal vane Remote controller Outdoor unit Name Air outlet grille Electronic box cover 2-way valve 3-way valve OUTD OOR UNIT...
Page 26 Air Conditioner Service Manual 9. Installation manual 9.1 Installation Details Connecting pipe length Pipe size(Inch) Model Liquid 1/4’’ 3/8(1/2) Indoor unit Outdoor unit Pipe l ength is Pi pe length is 15 meters Max. 15 meters Max. In do o r unit Outdoor unit Refrigerant piping Additional refrigerant...
Page 27 Air Conditioner Service Manual Installation for the first time Indoor unit  Install the indoor unit level on a strong wall that is not subject to vibrations  The inlet and outlet ports should not be Mounting plate obstructed: the air should be able to blow all over 150mm the room.
Page 28 Air Conditioner Service Manual  Install the indoor unit at a height of at least 2.5m from the ground. To install, proceed as follows: 9.2.1 Installation of the mounting plate. By using a level, put the mounting plate in a perfect square position vertically and horizontally.
Page 29 Air Conditioner Service Manual 7).An efficient earth connection must be ensured. 8).If the power cable is damaged, it must be replaced by an authorized Service Centre. 9.2.4 Refrigerant piping connection The piping can be run in the 3 directions indicated by numbers in the picture.
Page 30 Air Conditioner Service Manual 4).If the piping is installed to the right, the pipes, power cable and drain hose must be lagged and secured onto the rear of the unit with a pipe connection.  Insert the pipe connection into the relative slot. ...
Page 31: Trouble Shooting
Air Conditioner Service Manual 10. Trouble shooting 10.1 Outdoor control diagram 10.2 The structure of ODU PCB TAC-09CHSA/JCI, TAC-12CHSA/JCI DC motor 4-way valve Indicator Compressor Expansion Sensor Communication motor driving valve circuit Switch EEPROM Rectifying power Filter circuit filtering circuit supply for heavy current...
Page 32 Air Conditioner Service Manual TAC-18CHSA/JCI, TAC-24CHSA/JCI 10.3 Connection of ODU PCB TAC-09CHSA/JCI, TAC-12CHSA/JCI COMP. (S-Black) CN401 CN12 CN13 （LEV） (OVT) (OPTOAT) （ORQ） (485-COM) (OHT) (CAN-Blue) P5-1、P8 wu v (VAL) CN409 (ACL-Brown) CN12-2 programmed CN11 CN410 (OUTFAN) P10-3(W) U405 P11-1、P11-2 CN12-1 (HEAT) (DC fan motor P10-2(V)
Page 33 Air Conditioner Service Manual TAC-18CHSA/JCI, TAC-24CHSA/JCI COMP. CN13 CN12 （LEV） (OHT) (OPTOAT) （ORQ） (OVT) (ACN) CN409 CN11 (ACL) (HEAT) CN410 programmed (OUTFAN) P10-1(U) U603 P5-1、P8 CN401 (VAL) (DCFAN) P10-2(V) (485-COM) CN407 P10-3(W) For EEPROM PC monitor programmed P14(L) D412 Q403 IGBT Fast recovery diode P13(L)
Page 34 Air Conditioner Service Manual 10.5 Examples of repairing 10.5.1 Display E1 or E2 Cause: Room temperature sensor (IRT) and Indoor pipe (coil) temperature sensor (IPT) or indoor main PCB fault. Solution: 1) Check the connecter of sensor and slot (CN6), if loose please connect again. 2) Measure the resistance on the two ends of indoor temperature sensor, if short or broken please replace it.
Page 35 Air Conditioner Service Manual 2) Measure the resistance on the two ends of indoor temperature sensor, if short or broken please replace it. 3) If the above testing is normal, please replace the outdoor PCB. 10.5.4 Display E0,E5 Cause: Indoor / outdoor communication fault. Solution: 1) Check if the indoor and outdoor connections are correct.
Page 36 Air Conditioner Service Manual 10.5.5 Display EA Cause: Current sensor fault Solution: Check for refrigerant leakage, to find the leakage point and recharge the refrigerant. Current sampling circuit broken on the outdoor PCB and replace outdoor PCB. 10.5.6 Display E9（first display P0 or P9） Cause: Outdoor PCB drive circuit broken.
Page 37 Air Conditioner Service Manual 10.6 MALFUNCTION (PARTS) CHECK METHOD 10.6.1 Procedure for determining defective outdoor unit IPM/compressor The following flow chart shows a procedure for locating the cause of a malfunction when the compressor does not start up and a DC overcurrent indication error occurs. Use the remote operates the air conditioner Connects wire...
Page 38 Air Conditioner Service Manual 10.6.2 DC Over Current Error Error memory is recorded Start Are valves (2-way or 3-war) close? Full open stop valves Does compressor rotates? Does compressor rotates more than 30 seconds? IPM PWB floating from the heat sink IPM PWB with screws securely.
Page 39 Air Conditioner Service Manual 10.6.3 E0,E5 Error Replace inverter board and power Display E5 Start supply board or outdoor PCB assembly Display E0 Display E5 Display E5 Shut off power and supply Shut off power Replace inverter board observe 10 Mins and supply again again and Display E0...
Page 40 Air Conditioner Service Manual 10.7 THERMISTOR TEMPERATURE CHARACTERISTICS 10.7.1 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 (℃) (k Ohm)
Page 41 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. 10.7.2 Outdoor unit sensor temperature characteristics TEMP.
Page 42 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 52.49 57.81 63.61 5.449...

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Tac-18chsa/jai Tac-24chsa/jai