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koppel ARF31 Series Service Manual

Floor mounted inverter
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R32 3TR FLOOR MOUNTED LCP INVERTER MODELS
FLOOR MOUNTED INVERTER
ARF31 SERIES
SERVICE MANUAL
KV36FM-ARF31

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  • Page 1 R32 3TR FLOOR MOUNTED LCP INVERTER MODELS FLOOR MOUNTED INVERTER ARF31 SERIES SERVICE MANUAL KV36FM-ARF31...
  • Page 3 Table of Contents §. Safety Precautions Precautions Information servicing(For flammable materials) §. Specifications Model Reference Pipe length and the Drop Height Electrical Wiring Diagrams §. Product Features Display Function Safety Features Basic Features Optional Features §. Maintenance First Time Installation Check Refrigerant Recharge Re-Installation §.

  • Page 4: Safety Precautions

    Safety Precautions Contents Precautions ......................2 Information servicing (For flammable materials) ..........3...

  • Page 5: Operation And Maintenance

    1. Precautions CAUTION To prevent personal injury, or property or unit damage, • • While unpacking be careful of sharp edges around adhere to all precautionary measures and instructions the unit as well as the edges of the fins on the con- denser and evaporator.

  • Page 6: Work Procedure

    2. Information servicing(For • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable flammable materials) hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area •...
  • Page 7 • that capacitors are discharged: this shall be done in shall also take into account the effects of aging or a safe manner to avoid possibility of sparking; continual vibration from sources such as compressors or fans. • that there no live electrical components and wiring are exposed while charging, recovering or purging 2.13 Detection of flammable refrigerants the system;...

  • Page 8: Charging Procedures

    • The refrigerant charge shall be recovered into the • Before attempting the procedure ensure that: correct recovery cylinders. The system shall be flushed • mechanical handling equipment is available, if with OFN to render the unit safe. This process may required, for handling refrigerant cylinders;...
  • Page 9 • Empty recovery cylinders are evacuated and, if • The recovered refrigerant shall be returned to the possible, cooled before recovery occurs. refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not • The recovery equipment shall be in good working mix refrigerants in recovery units and especially not in order with a set of instructions concerning the cylinders.

  • Page 10: Specifications

    Specifications Contents Model Reference ....................2 Pipe Length and Drop Height ................3 Refrigerant Cycle Diagrams ..................4 Electrical Wiring Diagrams ..................5...

  • Page 11: Model Reference

    1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model. Indoor Unit Model Outdoor Unit Model Capacity (Btu/h) Power Supply 1Phase, 230V, 60Hz KV36FM-ARF31 KV36ODU-ARF31  Specifications 2 ...

  • Page 12: Pipe Length And Drop Height

    2. Pipe Length and Drop Height The length and elevation of connection pipe are shown in the table below. if the pipe length exceeds max pipe length, additional refrigerant should be charged to ensure nominal cooling/heating capacity. Capacity(Btu/h) Standard Length Max Pipe Length Max Elevation Additional Refrigerant...

  • Page 13: Refrigerant Cycle Diagrams

    3. Refrigerant Cycle Diagrams  Specifications 4 ...

  • Page 14: Electrical Wiring Diagrams

    4. Electrical Wiring Diagrams Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram 16022200009737 16022000039792 KV36FM-ARF31 KV36ODU-ARF31 Outdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board 17122000061648 KV36ODU-ARF31 Specifications 5...
  • Page 15 Indoor unit abbreviations Abbreviation Paraphrase Yellow-Green Conductor HOR-SW Horizontal Fan VER-SW Vertical Fan L or 1 LIVE 2(N) NEUTRAL RT1,T1 Indoor Room Temperature RT2,T2 Coil Temperature of Indoor Heat Exchanger Outdoor unit abbreviations Abbreviation Paraphrase COMP Compressor CAP1,CAP2 Fan Motor Capacitor AC Current Detector Electric Expansion Valve DC FAN1,DC FAN2...
  • Page 18 Outdoor unit printed circuit board diagram: 17122000061648...
  • Page 19 Name Meaning EEV1 CN17 EEV-A CN16 connect to electric expansion valve EEV-B CN15 EEV-C CN14 Comp Top CN30 connect to compressor top temp. sensor (5VDC Pulse wave) T2C T2B T2A CN28 connect to evaporator coil outlet temperature sensor T2B connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust T3 T4 TP CN26 temp.

  • Page 20: Table Of Contents

    Product Features Contents Display Function ....................2 Safety Features ......................3 Basic Functions .......................4 Table ......................4 Abbreviation ....................4 Fan Mode ......................4 Cooling Mode ....................4 Heating Mode ....................5 Auto-mode ....................6 Drying Mode ....................6 Sleep Function ....................6 Optional Functions ....................7...

  • Page 21: Display Function

    1. Display Function Unit display functions O N/O F F MO DE FA N F UNC Fan speed Room Temp operation display /Set Temp display Indic ators On timer operation display Auto operation display Off timer operation display Heating operation display Turbo operation display(optional) Cooling operation display Sleep operation display...

  • Page 22: Safety Features

    2. Safety Features Indoor fan delayed operation • When the unit starts, the louver is automatically Compressor three-minute delay at restart activated and the indoor fan will operate after a period Compressor functions are delayed for up to three minutes of setting time.

  • Page 23: Basic Functions

    3. Basic Functions Table Cooling Mode&Heating mode Functions Auto Mode Outdoor Fan Control Case 1: Compressor Cases Case 2:T4 Case 1: Case 2: Frequency and T4 Models Note: The detailed description of case 1 or case 2 is shown in the following function sections(from 3.4 to 3.6). ...

  • Page 24: Abbreviation

    Abbreviation compressor ceases operation. • When calculated frequency (fb) is less than minimum Unit element abbreviations limit frequency (FminC). • When protective time is more than or equal to ten Abbreviation Element minutes. Indoor room temperature • When T1 is lower than or equal to (Tsc-CDIFTEMP). Coil temperature of evaporator Note: CDIFTEMP is EEPROM setting parameter.

  • Page 25: Heating Mode

    3.4.4 Condenser Temperature Protection When condenser temperature is more than setting value, the compressor ceases operation.. 3.4.5 Evaporator Temperature Protection When evaporator temperature drops below a configured value, the compressor and outdoor fan cease operation. Heating Mode(Heat pump units) 3.5.1 Compressor Control 1) Reach the configured temperature •...

  • Page 26: Auto-Mode

    • T3 maintained above TCDE2 for 80 seconds. and the setting temperature can be changed between 17°C~30°C. • Unit runs for 15 minutes consecutively in defrosting Case 1: mode. • If T4 is lower than or equal to -22°C and compressor •...
  • Page 27 • The operational process for sleep mode is as follows: • When cooling, the temperature rises 1°C (2°F) (to not higher than 30°C (86°F)) every hour. After 2 hours, the temperature stops rising and the indoor fan is fixed at low speed. •...

  • Page 28: Optional Functions

    4. Optional Functions Auto-Restart function • The indoor unit has an auto-restart module that 8°C Heating allows the unit to restart automatically. The module automatically stores the current settings and, in the In heating mode, the temperature can be set to as low case of a sudden power failure, will restore those as 8°C, preventing the indoor area from freezing if setting automatically after power returns.

  • Page 29: Maintenance

    Maintenance Contents First Time Installation Check .................2 Refrigerant Recharge ....................4 Re-Installation .......................5 Indoor Unit ....................5 Outdoor Unit ....................7...

  • Page 30: First Time Installation Check

    1. First Time Installation Check Air and moisture trapped in the refrigerant system affects To prevent air and moisture from affecting the air the performance of the air conditioner by: conditioner’s performance, the indoor unit, as well as the pipes between the indoor and outdoor unit, must be be •...
  • Page 31 Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations. are closed.

  • Page 32: Refrigerant Recharge

    2. Refrigerant Recharge mA A Procedure: Close both 2- and 3-way valves. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode to charge 3-way service port. the system with liquid refrigerant. Connect the charge hose to the valve at the bottom When the electronic scale displays the correct of the cylinder.

  • Page 33: Re-Installation

    3. Re-Installation Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi). Connect the charge hose with the push pin of Handle Lo to the 3-way valve’s gas service port.
  • Page 34 Air purging with vacuum pump Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations.

  • Page 35: Outdoor Unit

    Outdoor Unit Evacuation for the whole system Procedure: Wait for 5 minutes then check whether the gauge Confirm that the 2- and 3-way valves are opened. needle moves after turning off the vacuum pump. If Connect the vacuum pump to the 3-way valve’s the gauge needle moves backward, check whether service port.
  • Page 36 Refrigerant charging mA A Procedure: Close both 2- and 3-way valves. Fully open the Handle Lo manifold valve, 2- and 3-way valves. Slightly connect the Handle Lo charge hose to the 3-way service port. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant.

  • Page 37: Troubleshooting

    Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Complain Record Form ..................7 Information Inquiry ....................9 Error Diagnosis and Troubleshooting Without Error Code .......12 Remote maintenance ...................12 Field maintenance ..................13 Quick Maintenance by Error Code ..............18 Troubleshooting by Error Code ................19 TS01-IDU Indoor EEPROM Parameter Error Diagnosis and Solution TS01-ODU Outdoor EEPROM Parameter Error Diagnosis and Solution TS02-L-INV Indoor and Outdoor Unit Communication Error Diagnosis and Solution...
  • Page 38 Contents TS07 Indoor PCB/Display Board Communication Error Diagnosis and Solution TS09-L IPM Malfunction or IGBT Over-strong Current Protection Diagnosis and Solution TS10-L Over Voltage or Too Low Voltage Protection Diagnosis and Solution TS11-L Top temperature Protection of Compressor Diagnosis and Solution TS13-INV Low Pressure Protection Diagnosis and Solution TS18 Outdoor Unit Malfunction Diagnosis and Solution TS30 PFC Module Protection Diagnosis and Solution...

  • Page 39: Safety Caution

    1. Safety Caution WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. While checking indoor/outdoor PCB, please equip oneself with antistatic gloves or wrist strap to avoid damage to the board. WARNING Electricity remains in capacitors even when the power supply is off.
  • Page 40 These error codes are described in the following tables: Display Error Information Solution Defrost Self clean Heating in room temperature under 8°C Indoor unit EEPROM parameter error TS01-IDU EH 00/EH 0A Indoor/outdoor unit communication error TS02-L-INV EL 01 The indoor fan speed is operating outside of the normal range TS04-L-IDU EH 03 Outdoor temperature sensor is in open circuit or has short circuited...
  • Page 41 IPM malfunction or IGBT over-strong current protection TS09-L PC 00 Over voltage or over low voltage protection TS10-L PC 01 Top temperature protection of compressor TS11-L PC 02 Inverter compressor drive error TS09-L PC 04 PFC module protection TS30 PC 0F Communication error between outdoor main chip and compressor TS33 PC 40...

  • Page 42: Complain Record Form

    3. Complain Record Form Complain Record Form Request No.: Date: Installation Date: Service Date: Customer Information Name Telephone No. Home Address Email Product Information Indoor Unit Model Outdoor Unit Model Serial No. of indoor unit Serial No. of outdoor unit Working Mode □Cooling □Heating...
  • Page 43 Parameter Checking information by Remote controller Displaying code Displaying code meaning Display value Display value meaning Room temperature Indoor coil temperature Outdoor coil temperature Ambient temperature Discharge temperature Targeted Frequency Actual Frequency Compressor current Outdoor AC voltage Indoor capacity test Reserve Outdoor fan speed EXV opening steps...

  • Page 44: Information Inquiry

    4. Information Inquiry • To enter engineer mode, in power-on or standby mode, and in non-locked state, press the key combination “ON/OFF + Air Speed” for 7s: • After entering the engineer mode, the remote control will display icons of “Auto, Cool, Dry, Heat”, and the Battery icon;...
  • Page 45 Error code of engineer mode: Display Error Information EH 00/EH 0A Indoor unit EEPROM parameter error Indoor / outdoor unit communication error EL 01 Over low voltage protection of indoor external fan EH 31 Over voltage protection of indoor external fan EH 32 Over-current protection of indoor external fan EH 33...
  • Page 46 DC voltage protection PC 12 Over voltage or over low voltage protection PC 01 Top temperature protection of compressor or High temperature protection of IPM module or High PC 02 pressure protection Communication error between outdoor main chip and compressor driven chip PC 40 Current Input detection protection Pc 41...

  • Page 47: Error Diagnosis And Troubleshooting Without Error Code

    5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start 13-14...

  • Page 48: Field Maintenance

    Field maintenance Problem Solution Unit will not start 15-16 Compressor will not start but fans run 15-16 Compressor and condenser (outdoor) fan will not start 15-16 Evaporator (indoor) fan will not start 15-16 Condenser (Outdoor) fan will not start 15-16 Unit runs, but shortly stops 15-16 Compressor short-cycles due to overload...
  • Page 49 1.Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ The power switch is on but fans will not start ☆ ☆ ☆ The temperature on the display board cannot be set ☆...
  • Page 50 1.Remote Maintenance Others Possible causes of trouble Unit will not start The power switch is on but fans will not start ☆ The temperature on the display board cannot be set Unit is on but the wind is not cold(hot) Unit runs, but shortly stops The unit starts up and stops frequently ☆...
  • Page 51 2.Field Maintenance Refrigerant Circuit Others Possible causes of trouble Unit will not start Compressor will not start but fans run ☆ Compressor and condenser (outdoor) fan will not start Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start Unit runs, but shortly stops ☆...
  • Page 52 2.Field Maintenance Electrical Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...

  • Page 53: Quick Maintenance By Error Code

    6. Quick Maintenance by Error Code If you do not have the time to test which specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring replacement...

  • Page 54: Troubleshooting By Error Code

    Error Code Part requiring replacement EC 50/ec EC 53 EC 52 EC 54 EC 55 EC 51 EC 07 PC 00 Indoor PCB Outdoor PCB Outdoor fan motor T3 Sensor T4 Sensor TP Sensor TH Sensor Compressor IPM module board Note: For certain models, outdoor PCB could not be removed separately.

  • Page 55: Ts01-Idu Indoor Eeprom Parameter Error Diagnosis And Solution

    TS01-IDU: Indoor EEPROM parameter error diagnosis and solution Description: Indoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later. Is it still displaying The unit is operating normally.
  • Page 56 TS01-ODU: Outdoor EEPROM parameter error or Compressor driven chip EEPROM parameter error diagnosis and solution Description: Outdoor PCB main chip does not receive feedback from EEPROM chip or compressor driven chip. Recommended parts to prepare: • Outdoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.
  • Page 57  ...
  • Page 58 Remarks: • Use a multimeter to test the DC voltage between 2 port (or S or L2 port) and 3 port (or N or S port) of outdoor unit. The red pin of multimeter connects with 2 port(or S or L2 port) while the black pin is for 3 port (or N or S port) . •...
  • Page 59 XYE Communication: Recommended parts to prepare: • Signal wires • Magnet ring • Indoor PCB • Outdoor PCB Troubleshooting and repair: Power off, then restart the unit 2 Power off, then restart the unit 2 minutes later minutes later Check whether there’s any Check whether there’s any interference.
  • Page 60 TS04-L-IDU: The Indoor fan speed is operating outside of normal range diagnosis and solution) Description: When indoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off. Recommended parts to prepare: •...
  • Page 61 Index: 1. DC Fan Motor (control chip is in fan motor) some models: Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced. •...
  • Page 62 CN15 NO. Color Signal Voltage Yellow 208/230VAC Black 208/230VAC Yellow-Green 2.Indoor DC Fan IPM Board (Duct and Ceiling-floor Unit) Power on and when the unit is in standby, measure the voltage of CON1, pin1-pin2 and pin3-pin2 of CN1 in DC motor driver board.
  • Page 63 TS04-ODU: The outdoor fan speed is operating outside of normal range diagnosis and solution) Description: When outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off. Recommended parts to prepare: •...
  • Page 64 Index: 1. Outdoor DC Fan Motor (control chip is in outdoor PCB) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the fan motor must has problems and need to be replaced. otherwise the PCB must has problems and need to be replaced. 2.
  • Page 65 3. Outdoor DC Fan IPM Board (for some double fan models) Power on and when the unit is in standby, measure the voltage of CON1, pin1-pin2 and pin3-pin2 of CN1 in DC motor driver board. If the value of the voltage is not in the range showing in below tables, the outdoor main PCB must has problems and need to be replaced.
  • Page 66 TS05-IDU: Open circuit or short circuit of indoor temperature sensor (T1, T2) diagnosis and solution Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code. Recommended parts to prepare: • Connection wires •...
  • Page 67 TS05-L-ODU: Open circuit or short circuit of outdoor temperature sensor (T3, T4, TP, T2B) or outdoor unit EEPROM parameter error diagnosis and solution Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code or Outdoor PCB main chip does not receive feedback from EEPROM chip or compressor driven chip.
  • Page 68 TS05-ODU: Open circuit or short circuit of outdoor temperature sensor (T3, T4, TP, T2B,TH) diagnosis and solution Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code. Recommended parts to prepare: •...
  • Page 69 TS06-INV: Refrigerant Leakage Detection diagnosis and solution For some models, Description: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 < Tcool-1°C(1.8°F) does not keep continuous 4 seconds and compressor running frequency higher than 50Hz does not keep for 3 minutes, and this situation happens 3 times, the LED displays the failure code and the AC turns off.
  • Page 70 For some models,...
  • Page 71 TS07: Indoor PCB / Display board communication error diagnosis and solution Description: Indoor PCB does not receive feedback from the display board. Recommended parts to prepare: • Communication wire • Indoor PCB • Display board Troubleshooting and repair: Power off, then restart the unit 2 minutes later Is it still displaying the error code? The unit functions normally...
  • Page 72 TS09-L: IPM malfunction or IGBT over-strong current protection or Inverter compressor drive error diagnosis and solution Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the LED displays the failure code and the AC turns off. Or an abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on.
  • Page 73 Restart the unit when the power supply Restart the unit when the power supply Is the power voltage normal? Is the power voltage normal? returns to normal returns to normal Is the outdoor terminal voltage Are the power wires Reconnect the Is the outdoor terminal voltage Are the power wires Reconnect the...
  • Page 74 1. IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Turn off outdoor unit and disconnect power supply. 2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged. 3.
  • Page 75 TS10-L: Over voltage or too low voltage protection diagnosis and solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: • Power supply wires • IPM module board • PCB •...
  • Page 76 Check whether the power Restart the unit when the power supply Check whether the power Restart the unit when the power supply voltage is normal. gets normal voltage is normal. gets normal Check the wiring of Check the wiring of Measure whether outdoor Measure whether outdoor power wires well or...
  • Page 77 Index: 1. Normal voltage of P and N 208-240V (1-phase,3-phase) 380-415V (3-phase) In standby around 310VDC around 530VDC In operation With passive PFC module With partial active PFC With fully active PFC module module >200VDC >310VDC >370VDC >450VDC 2. Reactor Check Measure the resistance and voltage (to ground) of the reactor.
  • Page 78 TS11-L: Top temperature protection of compressor diagnosis and solution Description: If the sampling voltage is not 5V, the LED will display the failure. Recommended parts to prepare: • Connection wires • Outdoor PCB • Over load protector Troubleshooting and repair: Check if the air flow system Clear up the air inlet and outlet or the heat of indoor and outdoor units...
  • Page 79 TS13-INV: Low pressure protection diagnosis and solution Description: Outdoor pressure switch cut off the system because low pressure is lower than 0.13 MPa, the LED displays the failure code. Recommended parts to prepare: • Connection wires • Outdoor PCB • Low pressure protector •...
  • Page 80 Low pressure protection Low pressure protection Are the low pressure protector Are the low pressure protector and main control board wired and main control board wired Reconnect the low pressure protector and main Reconnect the low pressure protector and main properly? properly? control board...
  • Page 81 TS18: Outdoor unit malfunction Diagnosis and Solution Description: The indoor unit detect the outdoor unit is error. Recommended parts to prepare: • Outdoor unit Troubleshooting and repair: Power off, then restart the unit 2 Power off, then restart the unit 2 minutes later.
  • Page 82 TS30: PFC module protection diagnosis and solution Description: When the voltage signal that IPM send to compressor drive chip is abnormal, the LED displays the failure code and the AC turns off. Recommended parts to prepare: • Connection wires • Inductance •...
  • Page 83 Index: 1. Normal voltage of P and N 208-240V (1-phase,3-phase) 380-415V (3-phase) In standby around 310VDC around 530VDC In operation With passive PFC module With partial active PFC With fully active PFC module module >200VDC >310VDC >370VDC >450VDC 2. Reactor Check Measure the resistance and voltage (to ground) of the reactor.
  • Page 84 TS33: Communication error between outdoor main chip and compressor driven chip diagnosis and solution Description: The main chip cannot detect the compressor driven chip Recommended parts to prepare: • Outdoor main PCB • Electric control box Troubleshooting and repair: Shut off the power supply and Shut off the power supply and turn it on 2 minutes later.
  • Page 85 TS37: Indoor and outdoor mismatch malfunction diagnosis and solution Description: Indoor and outdoor units are mismatched, the LED displays this code. Please replace the matching indoor or outdoor unit.  Troubleshooting ...
  • Page 86 TS46: Outdoor IPM module temperature sensor fault diagnosis and solution Description: If the sampling voltage is 0V or 5V, the LED displays the failure code. Recommended parts to prepare: • IPM module PCB • Connection wires • Sensors • Outdoor main PCB Troubleshooting and repair: If the radiator has no sensor, follow the steps below to resolve, Power off, then restart the unit after 2 minutes.

  • Page 87: Check Procedures

    8. Check Procedures 8.1 Temperature Sensor Check WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury. 1. Disconnect temperature sensor from PCB (Refer to Chapter 5. Indoor Disassembly and Chapter 6. Outdoor Disassembly). 2.
  • Page 88 ATQ420D1TMU ATQ420D1UMU ATF235D22TMT Resistance Value KTQ420D1UMU KSN140D21UFZ ATF250D22UMT ATQ420D1SN5A1 ATH307CDRC8DUL Blue-Red Blue-Black 0.37Ω 1.28Ω 0.75Ω Red-Black Resistance Value KTM240D57UMT KTM240D43UKT KTM240D46UKT2 KTF310D43UMT Blue-Red Blue-Black 0.62Ω 1.03Ω 1.04Ω 0.65Ω Red-Black Troubleshooting  ...
  • Page 89 Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.3 IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1.
  • Page 90 Or test the conductivity of IPM with diode mode. Needle-type Tester Needle-type Tester Normal Value Normal Value Black Black Open-circuit 0.3-0.5V Needle-type Tester Needle-type Tester Normal Value Normal Value Black Black 0.3-0.5V Open-circuit Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.4 Normal voltage of P and N 208-240V (1-phase,3-phase) 380-415V (3-phase)
  • Page 91 Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..2 Temperature Sensor Resistance Value Table for TP (for some units)(°C --K) ..3 iii) Pressure On Service Port ..................4...
  • Page 92 i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731...
  • Page 93 ii) Temperature Sensor Resistance Value Table for TP(for some units) (°C --K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm...
  • Page 94 iii) Pressure On Service Port Cooling chart(R410A): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.1 10.6 75/63 (23.89/17.22) 10.7 11.2 80/67 (26.67/19.44) 11.2 11.9 90/73 (32.22/22.78) 10.5 10.3 10.0 10.6 12.4 13.0 70/59 (21.11/15) 75/63 (23.89/17.22)
  • Page 95 Heating chart(R410A): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 65(18.33) 32.5 30.0 26.6 25.4 23.3 20.5 19.0 75(23.89) 33.8 31.5 27.8 26.3 24.9 21.5...
  • Page 96 Cooling chart(R22): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 0.40 0.41 0.46 0.50 0.51 0.49 0.51 0.54 0.63...
  • Page 97 Heating chart(R22): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 18.9 17.8 15.8 14.3 13.0 11.6 10.3 65(18.33) 20.3 18.8 16.6 15.9 14.6 12.8 11.9 75(23.89) 21.1 19.7 17.3 16.4 15.6 13.4...
  • Page 98 Cooling chart(R32): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.3 10.8 75/63 (23.89/17.22) 10.9 11.4 80/67 (26.67/19.44) 11.4 12.1 90/73 (32.22/22.78) 10.7 10.5 10.2 10.8 12.6 13.3 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15)
  • Page 99 Heating chart(R32): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.9 29.1 25.8 23.3 21.2 18.9 16.8 65(18.33) 33.2 30.6 27.1 25.9 23.8 20.9 19.4 75(23.89) 34.5 32.1 28.4 26.8 25.4 21.9...
  • Page 100 System Pressure Table-R22 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -41.091 -41.964 1600 41.748 107.146 21.75 -32.077 -25.739 1650 16.5 239.25 43.029 109.452 -25.177 -13.319 1700 246.5 44.281 111.706 36.25 -19.508 -3.114 1750 17.5 253.75 45.506 113.911 43.5 -14.654 5.623 1800...
  • Page 101 System Pressure Table-R410A Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.623 -60.921 2350 23.5 340.75 38.817 101.871 21.75 -43.327 -45.989 2400 39.68 103.424 -36.992 -34.586 2450 24.5 355.25 40.531 104.956 36.25 -31.795 -25.231 2500 362.5 41.368 106.462 43.5 -27.351 -17.232 2550...
  • Page 102 System Pressure Table-R32 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.909 -61.436 1850 18.5 268.25 28.425 83.165 21.75 -43.635 -46.543 1900 275.5 29.447 85.005 -37.323 -35.181 1950 19.5 282.75 30.448 86.806 36.25 -32.15 -25.87 2000 31.431 88.576 43.5 -27.731 -17.916 2050...

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