Trane 4MXW2309CF000AA Service Manual
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Trane 4MXW2309CF000AA 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
4MXW2309CF000AA
4MXW2312CF000AA
4MXW2318CF000AA
4MXW2324CF000AA
4MXW2336CF000AA
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
4TXK2309CFP00AA
4TXK2312CFP00AA
4TXK2318CFP00AA
4TXK2324CFP00AA
4TXK2336CFP00AA
SAFETY WARNING
MS-SVM027A-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-SVM027A-EN January 2024 Confidential and proprietary Trane information...

  • Page 2: Table Of Contents

    CONTENTS Part Ⅰ Technical Information 1. Important Notice ................. 3 2. Refrigeration cycle diagram .............. 4 3. Electric Diagram ................. 5 3.1 Wiring diagram ................5 3.2 PCB LAOUT .................. 6 4. Electronic Controller Introduction ..........10 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 Heat pump Check valve Liquid side 2-way valve Capillary Heat exchange Heat exchange (Condenser) (Evaporator) Gas side 3-way valve 4-way valve Muffler Muffler Heating Cooling Compressor Liquid side 2-way valve Electronic expansion valve Heat exchange Heat exchange (Condenser) (Evaporator) Gas side...

  • Page 5: Electric Diagram

    3. Electric Diagram 3.1 Wiring diagram MODEL: INDOOR UNIT：4MXW2309CF000AA, 4MXW2312CF000AA, 4MXW2318CF000AA, 4MXW2324CF000AA, 4MXW2336CF000AA OUTDOOR UNIT: 4TXK2309CFP00AA, 4TXK2312CFP00AA, 4TXK2318CFP00AA, 4TXK2324CFP00AA, 4TXK2336CFP00AA...

  • Page 6: Pcb Laout

    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 Model 9K, 12K, 18K, 24K _ AC fan motor PCB type: A010268 9 10 ODU AC power output Fuse Transformer out IDU AC power input...
  • Page 7 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: A010412 Model...
  • Page 8 10 11 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 9 9K, 12K PCB type: 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 PCB type: A010386 18,24K...

  • Page 10: Electronic Controller Introduction

    PCB type: 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...

  • Page 11: Electronic Controller

    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. 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 12 b. When IPT≥7 , unit quit from protection. ℃ 2). Frequency Limitation: If 5℃≤IPT＜6 , the compressor frequency forbidden to increase ℃ 3). Normal Frequency Decreasing (NFD): If 3℃≤IPT＜4 , the frequency decreasing rate is 8Hz/90s, until to the lower frequency limit. ℃...
  • Page 13 c. To the set temperature After compressor ceased, the fan motor stops working according to the temperature of OPT and OAT, the max delay for the motor should be less than 160s. 2). When switch on unit on heating mode, ODU fan motor will delay 5s after compressor starts up 3).
  • Page 14 .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℃: a.
  • Page 15 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.

  • Page 16: Wifi Operation Maual

    2. When unit A/C working current more than Stopped current (I ), AC unit stops working. Only when the compressor stops for 3 min can the unit be recovered operation. 3. If unit have 6 times of over current stop-working protection continuously, this protection can’t be recovered unless press ON/OFF button.

  • Page 17: Part Ⅱ Installation And Maintenance

    Air Conditioner Service Manual Internet controller Home wireless router IDU WIFI module IDU PCB 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 18 important for installation and maintenance. Please follow the instructions bellow. ● The installation or maintenance must accord with the instructions. ● Comply with all national electrical codes and local electrical codes. ● Pay attention to the warnings and cautions in this manual. ●...
  • Page 19 Warnings When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant. Any presence of air or other foreign substance in the refrigerant circuit will cause system pressure rise or compressor rupture, resulting in injury.
  • Page 20 0.05 0.07 0.08 0.11 0.14 0.18 0.08 0.11 0.03 0.06 0.09 R290 0.038 0.15 0.24 0.29 0.34 0.41 0.53 0.18 0.24 0.29 0.36 0.41 0.51 0.65 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...
  • Page 21 Mind Static Electricity Must wear protective clothing and anti-static gloves Don`t use mobile phone Installation Safety  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. ...
  • Page 22 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 23  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 24: Installation

     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 25: 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 26: 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 27: 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 28 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 29 When extending the drain hose at the indoor unit, install the drain pipe. 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 30: Odu Installation

    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.  Insert the pipe connection into the relative slot.  Press to join the pipe connection to the base. Electronic connections 1.

  • Page 31: 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 32: 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 33 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 34: 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 35 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 36 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 37 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 38 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 39 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 40 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 41 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 42 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 43 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 44 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 45 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 46 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 47 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 48 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 49 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 50 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 51 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 52 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 53 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 54 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 55 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 56: 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 57: 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 58 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 59 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 60: 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 61 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 62 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 63 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 Shown as picture to take the cotton out...
  • Page 64 Air Conditioner Service Manual 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 Unfix screw btw Valve plate and base, you can take the 2-way and 3-way valve out by welding.
  • Page 65 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.

  • Page 66: 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 67: 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 68: 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 69 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 70 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 71 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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