TCL CWH09TBAI Service Manual
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TCL CWH09TBAI Service Manual

TCL CWH09TBAI Service Manual

Inverter air conditioner
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Service Manual
Models
CWH09TBAI/CWH09TBAO
CWH12TBAI/CWH12TBAO
CONTENTS
6. Explosion view and parts
 
Air Conditioner Service Manual
Inverter air conditioner
 
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Summary of Contents for TCL CWH09TBAI

  • Page 1: Table Of Contents

    Air Conditioner Service Manual     Inverter air conditioner Service Manual Models CWH09TBAI/CWH09TBAO CWH12TBAI/CWH12TBAO CONTENTS 1. Important Notice 2. Product Dimensions 3. Refrigeration cycle diagram 4. Operation details 5. Wiring diagram 6. Explosion view and parts 7. Precaution 8. Names of parts 9.

  • 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 3. Product Dimensions Indoor Unit: Outdoor Unit: Indoor unit Outdoor unit Model CWH09TBAI/CWH09TBAO 277.8 277.8 CWH12TBAI/CWH12TBAO...

  • 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)

  • Page 5: Operation Details

    Air Conditioner Service Manual Operation Details Remote controller ON/OFF button To switch the conditioner on and off. FAN SPEED button To select the fan speed of auto/low/mid/high. TEMP UP button Crease the temperature or time by 1 unit. ECO button In cooling mode,press this button ,the temperature will increase 2 on the base of setting temperature:...
  • Page 6 Air Conditioner Service Manual     Electronic Controller 1. 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 minutes delay for 4-way valve---The 4-way valve will be ceased for 2 minutes late after compressor to prevent the refrigerant-gas abnormal noise when the HEATING operation is OFF or switch to the other operation mode.
  • Page 7   the  compressor will run at very low frequency. In general, unit will change its running frequency according toδt to make room temperature closing to set temperature. (2) Outdoor temperature affects running frequency of the compressor Outdoor temperature affect compressor’s running frequency. Difference inlet temperature of outdoor unit is adapted by difference compressor running frequency.
  • Page 8 Air Conditioner Service Manual     seconds since the stop of compressor. 2) Auto fan control (heating) In heating mode (include in “I feel” mode) , fan speed is determined by t as the following: δ δt come up RT‐ST δt come down  ...
  • Page 9 Air Conditioner Service Manual   overheat protection. The compressor drops its frequency toward to F1 level until IPT≤52℃ If IPT≤52℃ and keep for 5 minutes, control system doesn’t limit running frequency. If IPT>62℃, control system shut down compressor, and recover while IPT drop less than 50℃. 6.
  • Page 10 Air Conditioner Service Manual   Error list   Digital LED Code Failure Type LED Code RUN、TIMER –both winking Indoor and outdoor communication failure RUN、TIMER –both winking Outdoor communication failure Indoor room temperature sensor (IRT) RUN-1 time/8s Indoor coil temperature sensor (IPT) RUN-2 times /8s Outdoor coil temperature sensor (OPT) RUN-3 times /8s...
  • Page 11 Air Conditioner Service Manual   Display on outdoor power source board:       blink time (n) Failure IPM protection Over voltage /lower voltage Overcurrent Exhaust over temperature protection Outdoor coil over temperature protection Drive fault and protection (V1，VP1) Communication fault with indoor unit Compressor overheat fault (compressor top switch) Short-circuit / open-circuit fault of outdoor temperature sensor Short circuit / open-circuit fault of outdoor heat exchanger temperature...

  • Page 12: Wiring Diagram

    Air Conditioner Service Manual 5. Wiring diagram Mode: CWH09TBAI/CWH09TBAO, CWH12TBAI/CWH12TBAO INDOOR UNIT: OUTDOOR UNIT...
  • Page 13 Air Conditioner Service Manual PAERTS LIST Indoor Unit-CWH09TBAI Part No. Part Name Q’ty Remark 210838031 Installation Plate 210755108W Base 210701883C Vertical Vane Assembly 210701905B Vertical Vane Connector 210737659H Vane 210737655 Cross Fan 1070100010 Bearing Mount 211237323B Evaporator 210755110B Face Frame...
  • Page 14 Air Conditioner Service Manual Indoor Unit-CWH12TBAI Part No. Part Name Q’ty Remark 210838031 Installation Plate 210755108W Base 210701883C Vertical Vane Assembly 210701905B Vertical Vane Connector 210737659H Vane 210737655 Cross Fan 1070100010 Bearing Mount 211237323B Evaporator 210755110B Face Frame 210701846AF Screw Cover 210701863F Air Filter 210738739A...
  • Page 15 Air Conditioner Service Manual   Mode: CWH09TBAO, CWH12TBAO OUTDOOR UNIT: 14   ...
  • Page 16 Air Conditioner Service Manual OUTDOOR UNIT-CWH09TBAO Part No. Part Name Q’ty Remark 1071990039 Grille 210800539 Top cover 211239732 Condenser 1080050004 Outdoor motor supporter 1170040162AB Outdoor motor 1070030060 Propeller fan 1080050001 Left grille supporter 210800537 Front plate 210754635 Fan guard 211239580 Compressor and accessories 1120110016J 4-way valve...
  • Page 17 Air Conditioner Service Manual OUTDOOR UNIT-CWH12TBAO Part No. Part Name Q’ty Remark 1071990039 Grille 210800539 Top cover 211244352 Condenser 1080050004 Outdoor motor supporter 1170040162AB Outdoor motor 1070030060 Propeller fan 1080050001 Left grille supporter 210800537 Front plate 210754635 Fan guard 211239580 Compressor and accessories 1120110016J 4-way valve...

  • Page 18: Precaution

    Air Conditioner Service Manual   8. Precaution 8.1 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 19 Air Conditioner Service Manual   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. 8.2 SAFETY RULES AND RECOMMENDATIONS FOR THE USER Do not try to install the conditioner alone;...
  • Page 20 Air Conditioner Service Manual   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. Selecting the most suitable temperature can prevent damage to the appliance. 8.3 SAFETY RULES AND PROHIBITIONS Do not bend, tug or compress the power cord since this could damage it.

  • Page 21: Names Of Parts

    Air Conditioner Service Manual   9.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 20 ...

  • Page 22: Installation

    Air Conditioner Service Manual 9. Installation manual 9.1 Installation Details Connecting pipe length Pipe size(Inch) Model Liquid CWH09TBAI/CWH09TBAO CWH12TBAI/CWH12TBAO Indoor unit Outdoor unit Pipe l ength is Pi pe length is 15 meters Max. 15 meters Max. In do o r unit...
  • Page 23 Air Conditioner Service Manual 9.2 Installation for the first time Indoor unit  Install the indoor unit level on a strong wall that is not subject to vibrations Mounting plate  The inlet and outlet ports should not be obstructed: the air should be able to blow all over 150mm the room.
  • Page 24 Air Conditioner Service Manual   Install the indoor unit at a height of at least 2.5m from the ground. To install, proceed as follows: 10.2.1 Installation of the mounting plate. 1) By using a level, put the mounting plate in a perfect square position vertically and horizontally.
  • Page 25 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. 10.2.4 Refrigerant piping connection The piping can be run in the 3 directions indicated by numbers in the picture.
  • Page 26 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. Press to join the pipe connection to the base.

  • Page 27: Introduction R32/R290 Air Conditioner Installation

    Air Conditioner Service Manual 10. 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 28 Air Conditioner Service Manual It is necessary to choose the place where the inlet and outlet air of the indoor unit is even.  It is necessary to avoid the places where there are other electrical products, power switch plugs ...
  • Page 29 Air Conditioner Service Manual 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. 3) Inspection of air conditioner  It is necessary to ensure that the air conditioner is in reliable ground connection before maintenance.
  • Page 30 Air Conditioner Service Manual 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.  Temporary wires and sockets are prohibited on the maintenance location. 6.
  • Page 31 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. Handling suggestions when a large amount of combustible refrigerant leaks: It is necessary to immediately operate the ventilating equipment while cutting off other power ...

  • Page 32: Trouble Shooting

    Temperature or fault code display Power factor adjustment Protection current samplin Emergencyl Switch signal input PFC Protection current sample Remote signal input Rotor position check 10.2 The structure of ODU PCB CWH09TBAI/CWH09TBAO, CWH12TBAI/CWH12TBAO DC motor 4-way valve Indicator Communication Compressor Sensor Expansion...
  • Page 33                                 10.3 Connection of ODU PCB CWH09TBAI/CWH09TBAO, CWH12TBAI/CWH12TBAO COMP. (S-Black) CN13 CN401 CN12 （LEV） （ORQ） (OVT) (485-COM) (OHT) (OPTOAT) (CAN-Blue) P5-1、P8 wu v (VAL) CN409...
  • Page 34 Air Conditioner Service Manual   18K, 24K 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) P10-2(V) (DCFAN) (485-COM) CN407 P10-3(W) For EEPROM PC monitor programmed P14(L) D412 Q403 IGBT Fast recovery diode...
  • Page 35 Air Conditioner Service Manual 10.5 Examples of repairing 10.5.1Display E1 or E2 Reasons: 1) The sensor connection terminal loose or not plugged in. Solution: Check the connecter of sensor and slot (CN6), if loose or not plugged in, please connect again.
  • Page 36 Air Conditioner Service Manual 3) The indoor main PCB damage. Solution: Replace the indoor main PCB. 10.5.3 Display E3, E7 Reasons: 1) Outdoor pipe temp sensor, outdoor temp sensor & exhaust temp sensor connection terminal loose or not plugged in. Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again.
  • Page 37 Air Conditioner Service Manual Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again. Outdoor pipe temp sensor damage. Fail Solution: Check and replace the sensor. 3) Outdoor PCB damage. Solution: Check and replace the outdoor PCB. 10.5.1 Display E0,E5 Reason Indoor / outdoor communication damage.
  • Page 38 Air Conditioner Service Manual 1 N L 5) Communication fault if resistance or optical coupler broken, replace outdoor PCB. Communication circuit 6) Is there any burnt on PCB? If no, test the rectifier, FRD, IGBT etc. any component broken, replace PCB.
  • Page 39 Air Conditioner Service Manual Solution: Re-energize and check the protection code on display. Firstly display P0. 1) If this code is displayed when the compressor is started for several seconds or even not started, check the compressor connection for correctness, if no insert wrong, replace outdoor PCB. Compressor connection 2) Check if the outdoor module is tightly installed onto the radiating fins and if the silicone is applied evenly, fix the screws again if loose.
  • Page 40 Air Conditioner Service Manual EEPROM 10.5.6 Display CL Cause: Air filter duty, the unit operation Cumulative time 500 hours, the controller will confirmation the filter dirty and display CL. Solution: Clean the air filter then cut off the power and supply again. 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...
  • Page 41 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 42 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 and supply again again and observe 10 Mins Display E0...
  • Page 43 Air Conditioner Service Manual   10.7 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 44 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. 2. Outdoor unit sensor temperature characteristics TEMP.
  • Page 45 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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