Trane 4MYW2309CF000AA Service Manual
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Trane 4MYW2309CF000AA Service Manual

Mini split hw inverter up to 23 seer
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Service Manual
Mini Split HW Inverter Up to 23
SEER.
Models
4MYW2309CF000AA
4MYW2312CG000AA
4MYW2312CF000AA
4MYW2318CF000AA
4MYW2324CF000AA
4MYW2336CF000AA
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment.
January 2024
4TYK2309CFP00AA
4TYK2312CGP00AA
4TYK2312CFP00AA
4TYK2318CFP00AA
4TYK2324CFP00AA
4TYK2336CFP00AA
SAFETY WARNING
MS-SVM026A-EN
Confidential and proprietary Trane information

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  • Page 1 Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment. MS-SVM026A-EN January 2024 Confidential and proprietary Trane information...

  • Page 2: Table Of Contents

    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 ....................... 11 4.1 Electronic Controller .......................... 11 4.2 WIFI OPERATION MAUAL ........................

  • Page 3: Part Ⅰ Technical Information

    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. 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 4: Refrigeration Cycle Diagram

    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) (Evaporator) Gas side 3-way valve 4-way valve Muffler Muffler...

  • Page 5: Electric Diagram

    3. Electric Diagram 3.1 Wiring diagram MODEL: INDOOR UNIT：4MYW2309CF000AA, 4MYW2312CF000AA, 4MYW2318CF000AA, 4TYK2336CFP00AA OUTDOOR UNIT: 4TYK2309CFP00AA, YK2312CFP00AA, 4TYK2318CFP00AA...
  • Page 6 MODEL: INDOOR UNIT：4MYW2312CG000AA OUTDOOR UNIT：4TYK2312CGP00AA...

  • Page 7: Pcb Laout

    INDOOR UNIT：4MYW2336CF000AA 3.2 PCB LAOUT Note: the PCB type is printed on the PCB, please inquire the PCB layout via the PCB type information. Indoor PCB 9K,12K,18K,24K(AC motor type) PCB type: A010268 Transformer IN ODU AC power output 9 10 Transformer OUT Fuse ODU AC power input...
  • Page 8 A010412 PCB type: A010283 PCB type: 9K,12K,18K,24K(DC motor ) PCB type: A010283...
  • Page 9 ODU AC power output Fuse ODU AC power input DC fan motor connection IDU/ODU wiring connection --N connector Power supply --N connector Anion connector IDU/ODU communication wiring Left-Right swing connector 10 Up-Down swing connector 11 Display 12 Emergency button 13 Temperature sensor connection 14 WIFI connection PCB type: A010403...
  • Page 10 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 A010386 18,24K...

  • Page 11: Electronic Controller Introduction

    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 4. Electronic Controller Introduction 4.1 Electronic Controller RT-------Room Temperature.
  • Page 12 1. Temperature control :16-31℃, and the operation of fan speed and vane position according to preset. 2. Compressor and process control 1). When RT-ST≥0.5℃, the compressor starts up working, AC operates as customer preset; 2). When a. RT-ST≤－3℃ and compressor keeps 2 min continuously; or b.
  • Page 13 1. Temperature control: 16~31℃. Fan speed: low Vane blade position: as customer preset 2. When ODU failure or stops for protection, IDU works as preset. 3. Failure protection: as cooling mode. 4. Energy saving and sleep mode: Invalid. 4.1.4 Heating mode 1.
  • Page 14 ST-CRT -3℃ -2℃ -1℃ 0 ℃ 0.5℃ 10 min. ≥3min. 5min. ≥ 7min. 2 min. 160S 160S COMPRESSOR OUTDOOR FAN ≤2min. ≤2min. INDOOR FAN 4-way VALVE 6. Defrost Note: t1: compressor continuous works time. t2: AC unit operation first time going to defrost circle. t3: compressor accumulated working time (when OPT≤3℃...
  • Page 15 The above operation can work one time only, when compressor stops working, the unit will once again inspect the function. If the vane works on swing: When IDU quits from cold air prevention, vane operate as preset. 8. “8℃” Heating When function effective, it will make sure the room temperature not lower than 8℃, unit works on heating mode.
  • Page 16 ECO button 10 times within 8s, the AUTO-RESTART will be activated. 4.1.10 Protection 4.1.10.1 Overload protection 1. Overload protection for Cooling or Dry mode 1). if: a. OPT≥62℃, unit stops working for overload protection. b. OPT＜55℃, after compressor stopped for 3 min, can the unit be started to operate. 2).

  • Page 17: Wifi Operation Maual

    protection. 2. When T ≥95℃, the AC unit stops working for AC system protection. If T ＜87℃,and after compressor stopped for 3 min, can the unit be started to operate. 3. If unit have 6 times of IPM over temperature stop working protection continuously, this protection can’t be recovered unless press ON/OFF button, and unit will show failure code.

  • Page 18: Part Ⅱ Installation And Maintenance

    Remote controller 4.2.2 Download and installation Customer can scan the QR in the user manual or from appliance APP store to download the APP and install it in the cell phone, while installation achieved, there would be an icon as picture created on the desktop.
  • Page 19 and other accidents. Warnings Electrical safety Precautions. 1) Cut off the power supply of air conditioner before checking and maintenance. 2) The air conditioner must apply specialized circuit and prohibit share the same circuit with other appliances. 3) The air conditioner should be installed in suitable location and ensure the power plug is touchable. 4) Make sure each wiring terminal is connected firmly during installation and maintenance.
  • Page 20 the valve at low pressure side (3-way valve), immediately stop the unit and disconnect power. Please note that the time for refrigerant recover should not exceed 1 minute. If refrigerant recovery takes too much time, may be cause compressor overheat, resulting in injury. During refrigerant recovery, make sure that two-way valve and 3-way valve are fully closed and power is disconnected before detaching the connecting pipe.
  • Page 21 0.68 1.08 1.32 1.53 1.87 2.41 1.14 1.51 2.54 3.12 4.02 0.306 2.05 2.71 3.24 3.97 4.58 5.61 7.254 3.31 3.96 4.85 6.86 8.85 Table GG.2 - Minimum room area (m2) Charge amount (M) (kg) Category (kg/m3) Minimum room area (m2) 0.152kg 0.228kg 0.304kg 0.456kg 0.608kg 0.76kg 0.988kg...
  • Page 22  Refrigerant Leak Detector  Appropriate Installation The left picture is the schematic diagram of a refrigerant leak Location detector. Caution: The installation should be in a well-ventilated condition location.  When you installing or maintaining an air conditioner using Refrigerant R32/R290, the location should be ...
  • Page 23 It is necessary to carry fire extinguisher(s) when installing and maintaining an air conditioner. On the maintenance site, there should be two or more kinds of dry powder, carbon dioxide and foam fire extinguishers and that such fire extinguishers Fire Extinguisher should be placed at stipulated positions, with eye-catching labels and in handy places.
  • Page 24  If the product is damaged to the extent that it is a must to open the refrigerating system for maintenance, it is a must to carry the product back to the maintenance station for maintenance. (It is prohibited to weld the refrigerant pipe and do other operations on the user’s site.) ...
  • Page 25  It is necessary to use a special leak detector to check whether the maintained electrical parts location have the leak refrigerant.  It is not allowed to refit, remove or cancel any component with the safety protection function after finishing the maintenance process.

  • Page 26: Installation

    2 Installation 2.1 Installation Dimension Diagram...

  • Page 27: Accessory

    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 2.2 Accessory...

  • Page 28: Tools

    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 Screw Adjustable/ drivers Crescent (Phillips & Safety Glasses Wrench Flat blade)

  • Page 29: Position

    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. not subject to vibrations 3）...
  • Page 30 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. 2).Take off the cover as indicated in the picture (by removing a screw or by breaking the hooks).
  • Page 31 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 1.6.4 Connecting the pipes. ...

  • Page 32: Odu Installation

    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. Pay attention that water is drained in a suitable place. ...

  • Page 33: Vacuum And Gas Leakage Test

    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. After having connected installation.

  • Page 34: Maintenance

    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. failure）...
  • Page 35 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. PROTECTION. IPM Module temperature PROTECTION Please check the troubleshooting for detail. 4-Way Value reversing abnormal..

  • Page 36: Trouble Shooting

    3.2 Trouble shooting 3.2.1 E0 ---IDU & ODU communication failure Start Display E0 IDU wiring Check and re- E0 disappear? connection correct? connect Check communication Replace/ re- E0 disappear? wiring and the connection, connect in good condition? ODU wiring Check and re- E0 disappear? Connection correct? connect...
  • Page 37 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 short circuit? The malfunction eliminated? Replace IDU PCB...
  • Page 38 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,/ heating 2.0-3.6Mpa) open? Replace the sensor Check the valves open or Replace the main PCB Open the valves Lower than 0.8 Mpa in cooling, 2.0 Mpa in...
  • Page 39 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. E6 disappear? Fan motor well Check and reconnect connected to PCB...
  • Page 40 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. When the sensor resistance recovery, unit revert to be standby, customer can switch on the unit directly. Start Display E3, E7 or E8 Is the sensor well connected...
  • Page 41 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. Display E9 Display F9 or FA first Replace ODU PCB then E9 Re-power on unit running...
  • Page 42 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. For built-in control (5pins) motor: check the V =310V? =15V? Check the fan motor,...
  • Page 43 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 terminal L/N, more than become normal 50V~? Unit works? Replace ODU PCB...
  • Page 44 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 Can compressor works or too slowly? fan motor start up? Works normal?
  • Page 45 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. 2. Test voltage on the big size electrolytic capacitor of ODU PCB, When DC busbar voltage V＞DC420V or V ＜DC150V, unit will recover back to previous status while DC190V＜V＜DC410V Display P1 Wait until the AC...
  • Page 46 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 Replace fan motor works? P2 disappear? IDU filter or ODU Clean IDU filter or condenser too...
  • Page 47 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 P4 disappear? dirty? or filter ODU condenser. blocked? IDU/ODU fan motor Fan blade...
  • Page 48 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. Display P5 Switch on unit after minutes Clean filter...
  • Page 49 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 ODU fan motor Fan motor Replace fan motor works normal? broken? P6 disappear? Sensor loosing...
  • Page 50 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 Fan motor Replace fan motor works normal? broken? P7 disappear? Sensor loosing...
  • Page 51 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℃; (2). On Heating mode: a.
  • Page 52 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). The compressor startup abnormal. The outdoor unit will shut off, and show P9 protection. (The unit will re-startup 6 times continuously, if it still can’t work normal, then show P9 code) Display P9 Check the compressor...
  • Page 53 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. Start Display F4 Check the 2-way...
  • Page 54 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? minutes and re-switch on Still F5? Replace ODU PCB 3.2.20 F6 The Compressor Lack of phase / Anti-phase protection.
  • Page 55 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 wiring connector, is it well connected? Problem solved? The Compressor Replace the wires wiring in good quality? Problem solved? Compressor phase- current test circuit failure...
  • Page 56 IPM overtemperature protection, when IPM temperature more than 95℃, it will show F7. Display F7 Clean or adjust the gap IPM well contact Any dust or gap btw btw IPM and heat sink to heat sink? IPM & heat sink? F7 disappear? Check the screw fully fasten?
  • Page 57 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 the 4-way valve wiring connection Re-connect correct? F8 disappear? Multimeter test the Is there 220V valve coil resistance, voltage on the 4-...

  • Page 58: Disassembly Idu & Odu

    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. Display Fy Check the pipe Check the room &...

  • Page 59: Idu Disassembly

    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. C.
  • Page 60 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. 6. Disassembly the middle frame. Clasps 插扣...
  • Page 61 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 with unit BASE FRAME, and take the control box out from unit.

  • Page 62: Odu Assembly

    screws Screws + motor 螺钉/卡扣 A. Unfix 2 screws of left side shown as 螺钉 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.
  • Page 63 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 64 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 65 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. step6：take out the noise cotton...
  • Page 66 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 67 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. step9：Disassemble exhaust pipe and air return pipe assembly Take exhaust pipe and air return pipe...
  • Page 68 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 69: Appendix

    APPENDIX Appendix 1 The comparison table of Celsius-Fahrenheit temperature Fahrenheit Fahrenheit Fahrenheit diplay Fahrenheit Celsius diplay Fahrenheit Celsius diplay Fahrenheit Celsius temperature temperature temperature ℃ ℃ ℃ (℉) (℉) (℉) (℉) (℉) (℉) 60.8 69/70 69.8 78/79 78.8 62/63 62.6 71/72 71.6 80/81...

  • Page 70: Appendix 3 Pipes Flaring

    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 71: Appendix 4 Thermistor Temperature Characteristics

    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 (k Ohm) resistance 63.513...
  • Page 72 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. R min R(t) R max TEMP. R min R(t) R max...
  • Page 73 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 5.73 6.02 0.9553 0.9997...
  • Page 74 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

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