Carrier Super Inverter Series Service Manual
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Carrier Super Inverter Series Service Manual

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SUPER INVERTER SERIES
MULTI TYPE
Service Manual 2018

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Summary of Contents for Carrier Super Inverter Series

  • Page 1 SUPER INVERTER SERIES MULTI TYPE Service Manual 2018...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ............................... 1 2 Information servicing ............................3 2. General information of Indoor Units ......................2 3. Features ................................3 4. Dimensions ..............................11 5. Service Space (unit: mm)..........................15 5. Wiring diagram ..............................17 6. Indoor units combination ..........................1 7.

  • Page 3: Precaution

    failure, and personal injury. Precaution  Do not let the air conditioner run for a 1.1 Safety Precaution long time when the humidity is very high and  To prevent injury to the user or other a door or a window is left open. people and property damage, the following ...
  • Page 4 or turn off the breaker. product.  There is risk of product damage or failure, or Use a firm stool or ladder when unintended operation. cleaning or maintaining the product.  Take care to ensure that nobody could Be careful and avoid personal injury. ...

  • Page 5: Information Servicing

    Ensure that the area is in the open or that it is 2 Information servicing adequately ventilated before breaking into the 1.Checks to the area system or conducting any hot work. A degree of Prior to beginning work on systems containing ventilation shall continue during the period flammable refrigerants, safety checks are that the work is carried out.
  • Page 6 10. Repairs to sealed components flammable refrigerants. Electronic leak detectors shall be used to detect flammable 10.1 During repairs to sealed components, all electrical supplies shall be disconnected from the refrigerants, but the sensitivity may not be adequate, equipment being worked upon prior to any removal or may need re-calibration.
  • Page 7 In addition to conventional charging procedures, j) When the cylinders have been filled correctly and the following requirements shall be followed: the process completed, make sure that cylinders and the equipment are removed from site  Ensure that contamination different promptly and all isolation valves on the equipment refrigerants does not occur when using charging are closed off.
  • Page 8 remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.

  • Page 10: General Information Of Indoor Units

    General information of Indoor Units Four-way cassette (compact) Console A6 Ducted 38QUS018D8S2* 38QUS036D8S4* 38QUS027D8S3* 38QUS042D8S5*...

  • Page 11: Features

    Features 2.1 Four-way cassette type(compact) ⑴ New panel  360° surrounding air outlet design, affords comfortable feeling ⑵ Compact design  The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for installation and will not damage the decoration. The panel size is 647×50×647mm. ...
  • Page 12 Fresh Dimension:Φ75mm ⑸ Air passage function  Reserves the space for air outlet from the side of indoor unit; It’s availed to connect air duct from the two sides to the nearby small rooms.
  • Page 13 2.2 Ducted 2.2.1 Higher Static Pressure  As a ducted air conditioner with medium static pressure, it has the widest static pressure range.  The maximum static pressure reaches 160 Pa 2.2.2 Slim Design  The industry Lowest height is designed to be fitted into tight roof spaces. 2.2.3 Constant air volume control ...
  • Page 14 Filter 2.2.5 Flexible Air Intake Way (Bottom side or Rear side)  The frame size of air inlet in rear and bottom is the same. It’s very easy to switch to match different application. Air intake from bottom (Optional) Air intake from rear (Standard) 2.2.6 Communication wire connection ...
  • Page 15 2.2.7 Easy Clean  Clean the filter (Optional, standard product without filter)  It is easy to draw out the filter from the indoor unit for cleaning, even the filter is installed in rear side or bottom side.  With a larger window design, once the motor and the blower wheels have been detached, heat exchanger and water receiver tray in behind can be seen very clearly.
  • Page 16 2.2.9 Fresh air intake function(Optional)  Install one duct from the reserved fresh-air intake to outdoor. Continually inhale the fresh air to improve the quality of the indoor air, fulfills air quality more healthy and comfortable.  A ventilation motor (provided by the installer) can be installed inside the fresh air duct to improve the fresh air volume.
  • Page 17 2.3 Console (1) Consumes up to 30% less energy than non-inverter units ——DC inverter compressor ——indoor fan motor adopts DC motor (2) Achieves set temperature more quickly ——air supplying from top and bottom or from top only ——air inlet from four directions (3) Compact unit body, space saving ——this unit body is very thin and harmonious with room.
  • Page 18 ——flexible air blow: vertical auto swing and wide angle louvers ensure that warm air reaches the furthest corners of the room and increase the air flow coverage ——Low noise operation, lowest to 23Db ——Low starting power and precise room temperature adjustment (7) Powerful mode can be selected for rapid cooling or heating.

  • Page 19: Dimensions

    Dimensions 3.1 Four-way cassette type (compact): Drain hole Gas side ( for Service ) Liquid side Body 4-install hanger 150 Distribution duct E-parts box 4-Screw hole (for install panel) Drain pipe Fresh air intake Wiring connection port Panel...
  • Page 20 3.2 A6 Ducted Model unit (KBtu/h) 9/12 inch 27.6 19.9 17.7 21.1 23.6 29.2 14.2...
  • Page 21 3.3 Console Hanging arm 16 Drain pipe...
  • Page 22 3.4 Hi-wall 3.7.1 Indoor Unit Model (KBtu/h) 42QHC007D8S 42QHC009D8S 42QHC012D8S 42QHC018D8S 42QHC024D8S 1082...

  • Page 23: Service Space (Unit: Mm)

    Service Space (unit: mm) 4.1 Four-way cassette (compact) 4.2 Ducted Ensure enough space required for installation and maintenance . All the indoor units reserve the hole to joint the fresh air pipe. The hole size as following:...
  • Page 24 4.3 Console 4.4 Hi-wall...

  • Page 25: Wiring Diagram

    Wiring diagram 38QUS018D8S2*...
  • Page 26 Note: S(1)&S(2) are used in other type of models. They don't need to be connected in multi models. 38QUS027D8S3*...
  • Page 27 38QUS036D8S4* 38QUS042D8S5*...
  • Page 28 42QHC007D8S*、42QHC009D8S*、42QHC012D8S*、42QHC018D8S*、42QHC024D8S* 16022000A83297 42QTD009D8S*、42QTD012D8S* 、42QTD018D8S*...
  • Page 29 42QSS009D8S*、42QSS012D8S* 42QZA012D8S*...

  • Page 30: Indoor Units Combination

    Indoor units combination 6.1 Indoor unit combination for 38QUS018D8S2* 38QUS018D8S2 One unit Two unit 9+12 7+12 *7 only is Hi-wall. 6.2 Indoor unit combination for 38QUS027D8S3* 38QUS027D8S3 One unit Two unit Three unit 12+18 7+7+7 7+9+9 9+9+9 9+12 7+7+9 7+9+12 9+9+12 7+12 9+18...
  • Page 31 6.4 Indoor unit combination for 38QUS042D8S5* 38QUS042D8S5 One Unit Two Unit Three Unit 12+18 7+7+7 7+9+9 7+12+18 9+9+18 9+18+18 9+12 12+24 7+7+9 7+9+12 7+12+24 9+9+24 12+12+12 7+12 9+18 18+18 7+7+12 7+9+18 7+18+18 9+12+12 12+12+18 7+18 9+24 7+7+18 7+9+24 9+9+9 9+12+18 12+12+24 7+24 12+12...

  • Page 32: Operation Temperature Range

    Operation temperature range Temperature Cooling operation Heating operation Drying operation Mode Room temperature 18℃～32℃ 0℃～27℃ 18℃～32℃ Outdoor temperature 0℃～46℃ -15℃～24℃ 0℃～46℃ CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally. 2.

  • Page 33: Electronic Function

    Electronic function Note: Below function only for light commercial, for Hi-wall units, please refer to 1 drive 1 service manuals. 8.1 Abbreviation T1: Indoor room temperature T2: Indoor evaporator temperature T2B: Coil temperature of indoor heat exchanger outlet (This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature...
  • Page 34 8.2.3 15C 8.3 Main Protection 8.3.1 Three minutes delay at restart for compressor. 8.3.2 Sensor protection at open circuit and breaking disconnection. 8.3.3 Indoor fan delayed open function ----When system starts up, the louver will be active immediately, and the indoor fan will open after certain time.
  • Page 35 8.4.1 Fan-only mode (1) Outdoor fan and compressor stop. (2) For Console: Indoor fan can be set to high/med/low/breeze, for other models: Indoor fan can be set to high/med/low/auto. (3) The louver operates same as in cooling mode. (4) Auto fan in fan-only mode acts as follow: For all models: T1-24 (H-L)*0.75+L...
  • Page 36 Setting fan T1-Td ℃(° F) Actual fan speed speed H+(H+=H+G) H（=H） H-（H-=H-G) M+(M+=M+Z) M(M=M) M-(M-=M-Z) L+(L+=L+D) L(L=L) L-(L-=L-D) The auto fan acts as below rules: T1-Td (H-L)*0.75+L (H-L)*0.5+L (H-L)*0.25+L 8.4.2.3 Evaporator low temperature T2 protection For all models: When T2<4℃ for 250s or T2<0℃ , the indoor has no capacity demand and resume till T2>8℃...
  • Page 37 8.4.4.2 Indoor fan running rules For all models: In heating mode, indoor fan can be selected as high, medium, low and auto. The anti-cold- wind function has the priority. When the compressor is running, the indoor fan is controlled as below: Setting fan T1-Td℃...
  • Page 38 8.4.4.4 Prevent Over-Heating In heating mode, when the indoor unit has no capacity requirement due to indoor room temperature increased, the Indoor fan will run in super breeze. (Anti-cold wind function has the priority) 8.4.4.5 Defrosting mode： Condition of defrosting: AC will enter the defrosting mode according to the value of temp.
  • Page 39 If the machine switches mode between heating and cooling, the compressor will keep stopping for 15 minutes and then choose mode according to T1-Ts. If the setting temperature is modified, the machine will choose running function again. 8.4.6 Forced operation function 8.4.6.1 Enter forced operation function: Press the touch button continually, the AC will run as below sequence: Forced auto→Forced cooling→Off...
  • Page 40 8.4.8 Sleep mode 8.4.8.1 The sleep function is available in cooling, heating or auto mode. 8.4.8.2. Operation process in sleep mode is as follow. After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode. When cooling, The set temperature rise 1℃ per hour(be lower than 30℃). Two hours later, the set temperature will maintain as a constant and the fan speed is kept at low speed.
  • Page 41 If the indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote controller, the buzzer will emit a sound and this indicates the follow me function is initiated. But when the indoor PCB receives signal which sent from remote controller every 3 minutes, the buzzer will not respond.

  • Page 43: General Information Of Outdoor Units

    General information of Outdoor Units Model name Dimension (mm) Compressor 38QUS018D8S2 KSM135D23UFZ 800x333x554 38QUS027D8S3 KTF235D22UMT 845x363x702 38QUS036D8S4 KTF310D43UMT 946x410x810 38QUS042D8S5 KTF310D43UMT 946x410x810...

  • Page 44: Features

    Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation. Anti-rust cabinet Valve protection cover It protects the valves and prevents water from dripping.

  • Page 45: Dimensions

    Dimensions Unit：mm Model 38QUS018D8S2 38QUS027D8S3 38QUS036D8S4 1034 38QUS042D8S5 1034...

  • Page 46: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram 12.1 Refrigeration circuit drawing of inverter 1 drive 2 type INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A CHECK VALVE EXV B CAPILLARY B LIQUID VALVE B Condenser temp. sensor CAPILLARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE (EVAPORATOR)
  • Page 47 12.3 Refrigeration circuit drawing of inverter 1 drive 4 type INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A EXV B CAPILLARY B LIQUID VALVE B CHECK VALVE EXV C CAPILLARY C LIQUID VALVE C Condenser temp. sensor EXV D CAPILLARY D CAPILLARY TUBE LIQUID VALVE D HEAT...

  • Page 48: Sound Levels

    13 Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) 38QUS018D8S2 38QUS027D8S3 38QUS036D8S4 38QUS042D8S5...

  • Page 49: Installation Details

    14 Installation Details 14.1.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) 14.1.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²...
  • Page 50 ● When refrigerant pipe diameter is different from that of outdoor unit union (for 18K&24K indoor unit), additional transfer connector needs to be used on outdoor unit union. Indoor unit Extension pipe diameter (mm/inch) Model Pipe diameter (mm/inch) Liquid 6.35(1/4) Liquid 6.35(1/4) 7K9K12K...
  • Page 51 (Indoor unit) (Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Close Manifold valve Compound meter Pressure gauge -0.1MPa Handle Lo Handle Hi Charge hose Charge hose Vacuum pump Vacuum pump 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the closed position.
  • Page 52 2. Adding the refrigerant if the pipe length >5m Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
  • Page 53 14.1.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
  • Page 54 14.1.6 Re-installation while the indoor unit need to be repaired 1. Collecting the refrigerant into the outdoor unit Procedure 1). Confirm that both the 2-way and 3-way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 55 14.1.7 Re-installation while the outdoor unit need to be repaired 1. Evacuation for the whole system Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the opened position. 2). Connect the vacuum pump to 3-way valve’s service port. 3).
  • Page 56 2. Refrigerant charging Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.

  • Page 57: Electronic Control Function

    Electronic control function 17.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts: Setting temperature 17.2 Electric control working environment.
  • Page 58 17.4 Outdoor unit point check function A check switch is included on the outdoor PCB. Push SW1 to check the unit's status while running. The digital display shows the following codes each time the SW1 is pushed. Display Remark Number Presses Normal display Displays running frequency, running state, or malfunction code...
  • Page 59 Outdoor ambient temperature (T4) The display value is between 30–129 ℃. If the temperature is lower than Compressor discharge temperature (TP) 30 ℃, the digital display shows “30.” If the temperature is higher than 99 ℃, the digital display shows single and double digits. For example, if the digital display shows “0.5", the compressor discharge temperature is 105 ℃.
  • Page 60 VOLTAGE No limit VOLT_LTM_FREQ1_ADD VOLT_LTM_FREQ2_ADD Note: if the low voltage protection occurs and not resumes within 3min, it will keep the protection always after restart the machine. 17.5.4 Compressor current limit protection Temperature interval.of current limit is same as range of T4 limited frequency. Cooling mode: CoolZone5 CoolZone4...
  • Page 61 Decrease Hold Resume 17.5.7 Outdoor unit anti-freezing protection When T2<4℃ for 250 seconds or T2<0℃, the indoor unit capacity demand will be zero and resume to normal when T2>8℃ and the time of protection is no less than 3 minutes. 17.5.8 Oil return Running rules: 1.

  • Page 62: Troubleshooting

    16 Troubleshooting 16.1 Indoor unit error code explanation: For 15C/Cassette Operation Lamp Malfunction Error Code Timer Lamp (flashes) Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Water level alarm Overcurrent protection (For some units)
  • Page 63 ☆ Too low ambient temperature protection ☆ Inverter compressor drive protection ☆ Mode conflict ☆ Low pressure protection of compressor X(off) ☆(flash at 2Hz) O (on) For other type Operation Lamp Malfunction Error Code Timer Lamp (flashes) Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor...
  • Page 64 16.2 Outdoor unit error code explanation: Display LED STATUS Outdoor EEPROM malfunction Indoor / outdoor units communication error Communication malfunction between IPM board and outdoor main board Open or short circuit of outdoor unit temperature sensor(T3,T4.T5) Voltage protection PFC module protection Outdoor fan speed has been out of control No A Indoor unit coil outlet temperature sensor or connector of sensor is defective No B Indoor unit coil outlet temperature sensor or connector of sensor is defective...
  • Page 65 Trouble shooting 16.3 16.3.1 For the indoor unit 16.3.1.1 Indoor EEPROM malfunction Power off, then restart the unit 2 minutes later Replace the indoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 66 18.3.1.2 Indoor / outdoor units communication error Indoor / outdoor units communication error Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring diagram.
  • Page 67 Pic 1: check the voltage of N to S (Vs), is it moving alternately between positive value and negative value? Pic 2: IPM or outdoor main PCB Operating Self-Check Pic 2: IPM or outdoor main PCB Power, Self-Check Operating els)
  • Page 68 PIC3 : Main board LED when power on and unit standby. PIC 4: check point button, Press 1 time for check how many indoor units are connected...
  • Page 69 18.3.1.3 indoor unit fan speed has been out of control Power off, then restart the Power off, then restart the unit 2 minutes later. Is it still The unit operates normally. unit 2 minutes later. Is it still The unit operates normally. displaying the error code? displaying the error code? Find out the cause and...
  • Page 70 For console: DC motor voltage input and output For split type: Color Signal Voltage Vs/Vm 280V~380V Black White 14-17.5V Yellow 0~5.6V Blue 14-17.5V For other types: Color Signal Voltage Vs/Vm 192V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V...
  • Page 71 18.3.1.4 Open or short circuit of temperature sensor. Check the connections Check the connections between temperature between temperature Correct the connections. Correct the connections. sensor and PCB. Are the sensor and PCB. Are the connections good? connections good? Measure the resistance value Measure the resistance value of the sensor via Appendix 1 of the sensor via Appendix 1...
  • Page 72 18.3.2 For the super-slim cassette with up-down panel 18.3.2.1 Communication error between indoor unit and up-down panel F0 Displayed F0 Displayed Communication failure between Communication failure between indoor unit and up-down panel indoor unit and up-down panel Check the wire connection Check the wire connection between up-down panel and Correct the connection...
  • Page 73 18.3.3 For the outdoor unit 18.3.3.1 Outdoor EEPROM malfunction(ODU E0) Power off, then restart the Power off, then restart the unit 2 minutes later unit 2 minutes later Replace the outdoor main PCB Replace the outdoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 74 18.3.3.2 Communication malfunction between IPM board and outdoor main board(ODU E3) E3 display Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? Check the signal wire between the IPM board and the main board, is it connected good? Reconnect and retry.
  • Page 75 18.3.3.3 Voltage protection(ODU E5) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is about 220~240VAC Check whether the voltage of IPM board P and N is normal? DC277-356V for 18-27KBtu/h;...
  • Page 76 18.3.3.4 Outdoor unit fan speed has been out of control (E8) Power off, then restart the Power off, then restart the unit 2 minutes later. Is it still The unit operates normally. unit 2 minutes later. Is it still The unit operates normally. displaying the error code? displaying the error code? Find out the cause and...
  • Page 77 18.3.3.5 High pressure protection (ODU P1)(For 38QUS036DS4*, 38QUS042DS5*) High pressure protection High pressure protection Whether the wiring Whether the wiring between the high pressure between the high pressure switch and main control switch and main control Connect it well Connect it well board is connected well or board is connected well or correctly...
  • Page 78 18.3.3.6 Low pressure protection (ODU P2)(For38QUS036DS4*, 38QUS042DS5*) Low pressure protection Low pressure protection Whether the wiring Whether the wiring between the low pressure between the low pressure protector and main control Connect it well protector and main control Connect it well board is connected well or board is connected well or correctly...
  • Page 79 18.3.3.7 Current protection of compressor (ODU P3) Current protection of compressor Judge 1: Check whether the input current of the power supply wire is higher than max protection current value Check whether the refrigerant system is ok Judge 2: Check whether the outdoor ambient Stop the unit temperature is higher than...
  • Page 80 18.3.3.8 Temperature protection of compressor discharge (ODU P4) Temperature protection of Temperature protection of compressor discharge compressor discharge Check whether the Check whether the Check whether the Check whether the compressor discharge temp. is compressor discharge temp. is Stop leaking and add refrigerant Stop leaking and add refrigerant refrigerant is leak refrigerant is leak...
  • Page 81 18.3.3.9 High temperature protection of condenser (ODU P5) When outdoor pipe temperature is more than 65° C, the unit will stop, and unit runs again when outdoor pipe temperature less than 52° C. Check the connection Check the connection between temperature Correct the connection between temperature Correct the connection...
  • Page 82 18.3.3.10 IPM module protection (ODU P6) IPM module protection Check whether the voltage range Check whether the input Regulate it to correct, then of P-N on IPM module is normal? power supply is correct? check whether the system DC277-356V for 18-28KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36-42KBtu/h...
  • Page 83 16.4 Main parts check Spec. Indoor unit 9K/12K/18K/24K 9K/12K/18K 9K/12K 18K/24K Model Cassette Console Ducted Indoor fan motor ZKFP-46-8-1 ZKFP-20-8-2 ZKFN-55-8-1 ZKFN-55-8-1 18K/24K Model Cassette Ducted Indoor fan motor ZKFP-124-8-2 ZKFN-160-8-1-2 Outdoor unit Model 1x2(14k) 1x2(18k) 1x3(21K) 1x3(27K) Compressor ASN108D22UEZ ASM135D23UFZ ASM135D23UFZ ATF235D22UMT...
  • Page 84 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 85 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4,T2B (℃--K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190...
  • Page 86 Appendix 2 Temperature Sensor Resistance Value Table for T5 (℃--K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37 11.79 3.296 406.7 54.89...
  • Page 87 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue - 1.57Ω(20℃) 1.75Ω(20℃) 0.75Ω(20℃) 0.65Ω(20℃)
  • Page 88 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...

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