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ComfortStar CPP3 I Series Service Manual

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SPLIT AIR CONDITIONERS
Serice Manual
CPP3(I)+CPP3(O)
CPP3(I)+CHF3(O) SERIES
1W
IMPORTANT NOTE:
Read this manual carefully before operating your
new air conditioning unit. Make sure to save this
manual for future reference.

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  • Page 1 SPLIT AIR CONDITIONERS Serice Manual CPP3(I)+CPP3(O) CPP3(I)+CHF3(O) SERIES IMPORTANT NOTE: Read this manual carefully before operating your new air conditioning unit. Make sure to save this manual for future reference.
  • Page 3 Table of Contents §. Safety Precautions Precautions Information servicing(For flammable materials) §. Specifications Model Reference Pipe length and the Drop Height Air Velocity and Temperature Distributions Refrigerant Cycle Diagrams Electrical Wiring Diagrams §. Product Features Display Function Safety Features Basic Features §.

  • Page 4: Safety Precautions

    Safety Precautions Contents Precautions ......................2 Information servicing(For flammable materials) ..........4...

  • Page 5: In Case Of Accidents Or Emergency

    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 the system; WARNING For Using Flammable Refrigerant -- that steel pipes and components shall be protected against 1. Installation (Space) corrosion with a rustproof coating before applying any insulation; - That the installation of pipe-work shall be kept to a minimum. -- that precautions shall be taken to avoid excessive vibration or - That pipe-work shall be protected from physical damage.

  • Page 7: Work Procedure

    Examples for such working procedures are: is to be surveyed to make sure that there are no flammable • breaking into the refrigerating circuit; hazards or ignition risks. • opening of sealed components; • NO SMOKING signs shall be displayed. •...

  • Page 8: Detection Of Flammable Refrigerants

    2.10 Sealed electrical components shall be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.) Ensure that replaced the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment •...
  • Page 9 2.15 Charging procedures completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. • In addition to conventional charging procedures, the following requirements shall be followed: •...
  • Page 10 Compliance with local regulations 3. Disposal of equipment using flammable refrigerants Compliance with national regulations 4. Storage of equipment/appliances The storage of equipment should be in accordance with the manufacturer’s instructions. 5. Storage of packed (unsold) equipment Storage package protection should be constructed such that mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge.

  • Page 11: Table Of Contents

    Specifications Contents 1. Model Reference ................... 2 2. Pipe Length and Drop Height ..............3 3. Air Velocity and Temperature Distributions ..........4 4. Refrigerant Cycle Diagrams ................. 18 5. Electrical Wiring Diagrams ................23...

  • Page 12: 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 115V~, 60Hz, 1Phase CPP3-12CA(I) CPP3-12CA(O) 12k Series 6k Hyper Heat CPP3-06CD(I) CHF3-06CD(O) Series 9k Hyper Heat CHF3-09CD(O) Series...

  • Page 13: 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 14: Air Velocity And Temperature Distributions

    3. Air Velocity and Temperature Distributions 6k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 27° Airflow velocity distributions Temperature distributions  Specifications 4 ...
  • Page 15 6k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 60° Airflow velocity distributions Temperature distributions Specifications 5  ...
  • Page 16 9k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 27° Airflow velocity distributions Temperature distributions  Specifications 6 ...
  • Page 17 9k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 60° Airflow velocity distributions Temperature distributions Specifications 7  ...
  • Page 18 12k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 27° Airflow velocity distributions Temperature distributions  Specifications 8 ...
  • Page 19 12k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 60° Airflow velocity distributions Temperature distributions Specifications 9  ...
  • Page 20 18k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 20° Airflow velocity distributions Temperature distributions  Specifications 10 ...
  • Page 21 18k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 55° Airflow velocity distributions Temperature distributions Specifications 11  ...
  • Page 22 24k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 20° Airflow velocity distributions Temperature distributions  Specifications 12 ...
  • Page 23 24k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 50° Airflow velocity distributions Temperature distributions Specifications 13  ...
  • Page 24 30k/33k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 25° Airflow velocity distributions Temperature distributions  Specifications 14 ...
  • Page 25 30k/33k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 48° Airflow velocity distributions Temperature distributions Specifications 15  ...
  • Page 26 36k-Cooling(ID: 27°C/80.6°F, OD: 35°C/95°F) Discharge Angle 25° Airflow velocity distributions Temperature distributions  Specifications 16 ...
  • Page 27 36k-Heating(ID: 20°C/68°F, OD: 7°C/44.6°F) Discharge Angle 48° Airflow velocity distributions Temperature distributions Specifications 17  ...

  • Page 28: Refrigerant Cycle Diagrams

    4. Refrigerant Cycle Diagrams CHF3-06CD(O), CPP3-09CD(O), CHF3-09CD(O), CHF3-12CD(O), CPP3-12CA(O),CPP3-12CD(O)  Specifications 18 ...
  • Page 29 CHF3-18CD(O), CPP3-18CD(O) Specifications 19  ...
  • Page 30 CHF3-24CD(O)  Specifications 20 ...
  • Page 31 CPP3-24CD(O) Specifications 21  ...
  • Page 32 CHF3-36CD(O)  Specifications 22 ...

  • Page 33: Electrical Wiring Diagrams

    5. Electrical Wiring Diagrams Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram CPP3-12CA(I) CPP3-12CA(O) 16022000040956 CHF3-06CD(O) CPP3-06CD(I) 16022000040253 CPP3-09CD(O) CPP3-09CD(I) CHF3-09CD(O) 16022000040311 CPP3-09CD(O) CPP3-12CD(I) CPP3-12CA(O) CHF3-12CD(O) CHF3-18CD(O) CPP3-18CD(I) CPP3-18CD(O) 16022000040313 CPP3-24CD(O)
  • Page 34 Outdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board CPP3-12CA(O) 17122000062141 CPP3-12CA(O) CPP3-09CD(O) CPP3-12CA(O) 17122000057661 CHF3-06CD(O) CHF3-09CD(O) CHF3-12CD(O) CPP3-18CD(O) 17122000048066 CHF3-18CD(O) 17122000048064 CPP3-24CD(O) CHF3-24CD(O) 17122300007152 CHF3-36CD(O)  Specifications 24 ...
  • Page 45 Outdoor unit printed circuit board diagram: 17122000062141...
  • Page 46 Name Meaning TESTPORT used for testing(Output:0~5 V DC) DC-FAN connect to DC fan(Output:0~310 V AC) connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust TP T4 T3 CN21 temp. sensor TP(Output:0~5 VDC) HEAT1 CN17 connect to compressor heater, 115V AC when is ON 4-WAY CN60 connect to 4 way valve, 115V AC when is ON.
  • Page 47 Outdoor unit printed circuit board diagram: 17122000057661...
  • Page 48 Name Meaning TESTPORT used for testing CN31 connect to electric expansion valve (Output:0~2V DC) DC-FAN connect to DC fan (Output: 0~310V AC). connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust TP T4 T3 CN21 temp. sensor TP (Output: 0~5V DC) HEAT1 CN17 connect to compressor heater (Output: 230V AC).
  • Page 49 Outdoor unit printed circuit board diagram: 17122000048064& 17122000048066 RC 2 VU B...
  • Page 50 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (230V AC input) L_in: connect to L-line (230V AC input) S: connect to indoor unit communication(230V AC input) 4-WAY CN60 connect to 4 way valve(Output: 230V AC) AC-FAN connect to AC fan HEAT2 CN19...
  • Page 51 Outdoor unit printed circuit board diagram: 17122300007152...
  • Page 52 Name Meaning COMPRESSOR connect to compressor(Output: 0~310V AC) DC-FAN1 CN32 connect to DC fan(Output: 0~310V AC) TESTPORT CN45 used for testing HEAT_Y CN38 connect to compressor heater(Output: 230V AC) CN37 connect to 4 way valve 1(Output: 230V AC) 4-WAY CN25 connect to 4 way valve 2(Output: 230V AC) CN42 connect to 4 way valve 3(Output: 230V AC)
  • Page 53 Name Meaning EEVA CN17 EEVB CN16 EEVC CN22 EEVD CN14 EEVE CN13 connect to electric expansion valve(Output: 0~12V DC) EEVF EEV1 CN53 EEV2 CN44 EEV3 H_YL CN49 connect to high pressure sensor DC-FAN2 CN10 connect to DC fan(Output: 0~310V AC) Note: This section is for reference only.
  • Page 54 Product Features Contents Display Function ....................2 Safety Features ......................3 Basic Functions .......................4 Abbreviation ....................4 Fan Mode ......................4 Cooling Mode ....................4 Heating Mode(Heat Pump Units) ..............5 Auto-mode ....................7 Drying Mode ....................7 Forced Operation Function ................7 Timer Function ....................8 Sleep Function ....................8 3.10 Auto-Restart Function ..................8 3.11 Active Clean function ..................8 3.12 Follow me(Optional) ..................8...

  • Page 55: Display Function

    1. Display Function Unit display functions Display Function When Wireless Control feature is activated(For APP control units) Displays temperature, operation feature and Error codes • TIMER ON is set. (if the unit is OFF, remains on when TIMER ON is set ). (for 3s when) •...

  • Page 56: Safety Features

    2. Safety Features Compressor three-minute delay at restart Compressor functions are delayed for up to ten seconds upon the first startup of the unit, and are delayed for up to three minutes upon subsequent unit restarts. Automatic shutoff based on discharge temperature If the compressor discharge temperature exceeds a certain level for a period of time, the compressor ceases operation.

  • Page 57: Basic Functions

    3. Basic Functions • Calculated frequency(fb) is less than minimum limit frequency(FminC). • Compressor runs at FminC more than 10 minutes Abbreviation • T1 is lower than or equal to (Tsc-CDIFTEMP- Unit element abbreviations 0.5°C(1°F)) Note: CDIFTEMP is EEPROM setting parameter. It is Abbreviation Element 2°C(4°F) usually.

  • Page 58: Heating Mode(Heat Pump Units)

    • When T1-Tsc is higher than or equal to 0°C(0°F), fan speed increases to 20%; • When T1-Tsc is higher than or equal to 0.5°C(1°F), fan speed increases to 40%; • When T1-Tsc is higher than or equal to 1°C(2°F), fan speed increases to 60%;...

  • Page 59: Outdoor Fan Control

    3.4.3 Outdoor Fan Control: • The outdoor unit will be run at different fan speed according to T4 and compressor running frequency. • For different outdoor units, the fan speeds are different. 3.4.4 Defrosting mode • If any one of the following conditions is satisfied, AC will enter the defrosting mode.

  • Page 60: Auto-Mode

    • T3 rises above TCDE1. • T3 maintained above TCDE2 for 80 seconds. • Unit runs for 15 minutes consecutively in defrosting mode. • Condition 6, if any one of the following conditions is satisfied, defrosting ends and the machine switches to normal heating mode: •...

  • Page 61: Timer Function

    3.10 Auto-Restart function • Forced defrosting mode: • Press AUTO/COOL button continuously for 5s • The indoor unit has an auto-restart module that under forced cooling mode to enter this mode. allows the unit to restart automatically. The module • Indoor fan will stop, defrosting lamp will light on. automatically stores the current settings and, in the case of a sudden power failure, will restore those •...

  • Page 62: Eco Function(Optional)

    noise to the lowest possible level. 3.15 ECO function (Optional) • Used to enter the energy efficient mode. • Under cooling mode, press ECO button, the remote controller will adjust the temperature automatically to 24°C/75°F, fan speed of Auto to save energy (but only if the set temperature is less than 24°C/75°F).

  • Page 63: Maintenance

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

  • Page 64: 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 65 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 66: 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 67: 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 68 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 69: 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 70: Refrigerant Charging

    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 71: Troubleshooting

    Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Outdoor Unit Point Check Function ..............7 Complain Record Form ..................8 Information Inquiry .....................10 Error Diagnosis and Troubleshooting Without Error Code .......15 Remote maintenance ...................15 Field maintenance ..................16 Quick Maintenance by Error Code ..............21 Troubleshooting by Error Code ................23 TS01-IDU Indoor EEPROM malfunction or indoor EEPROM parameter error diagnosis and solution...
  • Page 72 Troubleshooting Contents TS08-S: Current overload protection diagnosis and solution TS05-N10: Refrigerant sensor error or Refrigerant sensor is out of range diagnosis and solution TS06-N10: Refrigerant sensor detects leakage or Refrigerant sensor is out of range and leakage is detected diagnosis and solution TS09-S ODU IPM module protection diagnosis and solution TS10-S ODU voltage protection diagnosis and solution TS11-S-INV Compressor top (or IPM) temp.

  • Page 73: 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 74: General Troubleshooting

    2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error on different models, an error code will be displayed; These error codes are described in the following tables: Display Information Solution Defrost Active clean Heating in room temperature under 8°C Normal Display, not error code Forced cooling...
  • Page 75 ODU voltage protection TS10-S PC 01 Compressor top (or IPM) temp. protection TS11-S-INV PC 02 Inverter compressor drive error TS12-S PC 04 Pressure protection(low or high pressure)(for some models) TS26-INV PC 03 Low ambient temperature protection(for some models) PC 0L IDUs mode conflict(Multi-zone) TS14 ----...
  • Page 76 Error Display (Outdoor Unit with auxiliary board) Display Malfunction or Protection Solution Normal Defrost Display, not Forced cooling error code ODU EEPROM parameter error TS01-ODU EC 51 IDU & ODU communication error TS02-S-INV EL 01 Communication error between outdoor main chip and compressor driven chip TS31 PC 40 ODU overcurrent protection...

  • Page 77: Outdoor Unit Point Check Function

    3. Outdoor Unit Point Check Function • A check switch is included on the auxiliary board. • Push SW1 to check the unit’s status while running. The digital display shows the following codes each time the SW1 is pushed. Number of Display Remark Presses...

  • Page 78: Complain Record Form

    4. 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 79 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 80: Information Inquiry

    5. Information Inquiry&Setting • 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 81 press "On/Off" for 2s to enter the Max. Set Temperature Selector, press the Up/Down key to select "25°C~30°C", press "OK" to confirm, and the Max. Set Temperature can be memorized when the remote control is powered TP temperature on and power lost; and press "On/Off" for 2s to exit. When the remote control does not burn any parameters, the max.
  • Page 82 press “On/Off” for 2s to enter Model Selection the code displayed is “Ch”, WIFI signal then press “OK” to send the Model Selection code, press the Up/Down key to strength select,such as 23,26,32,35,51,72,120 etc; and press “On/Off” for 2s to exit. press "On/Off"...
  • Page 83 • In Channel 1~30 settings of the engineer mode, long press the On/off key to return the previous engineer mode. • When the setting is successful, “CS” will be displayed;When the setting fails, “CF “will be displayed. Exit of engineer mode: 1)In engineer mode, press the key combination of “On/Off + Air speed”...
  • Page 84 ODU IPM module protection PC 00 ODU low AC voltage protection PC 10 ODU main control board DC bus high voltage protection PC 11 ODU main control board DC bus low voltage protection/341 MCE error PC 12 Compressor top (or IPM) temp. protection pc 02 Communication error between outdoor main chip and compressor driven chip PC 40...

  • Page 85: Error Diagnosis And Troubleshooting Without Error Code

    6. 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 TS17 - TS18...

  • Page 86: Field Maintenance

    Field maintenance Problem Solution Unit will not start TS19 - TS20 Compressor will not start but fans run TS19 - TS20 Compressor and condenser (outdoor) fan will not start TS19 - TS20 Evaporator (indoor) fan will not start TS19 - TS20 Condenser (Outdoor) fan will not start TS19 - TS20 Unit runs, but shortly stops...
  • Page 87  Troubleshooting 17 ...
  • Page 88 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 89 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 90 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 91: Quick Maintenance By Error Code

    7. 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 EH 00/...
  • Page 92 Part requiring replacement pc 06 pc 08/44/ 49 pc 0a pc 0f PC 40 Outdoor PCB Outdoor fan motor T3 Sensor TP Sensor Pressure sensor Reactor Compressor IPM module board High pressure valve assy High pressure protector Low pressure protector Additional refrigerant Electric control box Part requiring replacement...

  • Page 93: Troubleshooting By Error Code

    8. Troubleshooting by Error Code TS01-IDU: IDU EEPROM malfunction or 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.

  • Page 94: Troubleshooting And Repair

    TS01-ODU: ODU EEPROM parameter error diagnosis and solution Description: Outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Outdoor 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 95 TS02-S-INV: IDU & ODU communication error diagnosis and solution Description: Indoor unit can not communicate with outdoor unit Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Short-circuited component Troubleshooting and repair: Power off, then restart the unit after 2 minutes.
  • Page 96 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 97 TS03: Zero crossing detection error diagnosis and solution Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Recommended parts to prepare: • Connection wires • Indoor main PCB Troubleshooting and repair: Check the connections and power supply.
  • Page 98 TS04-S-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 99 Index: 1. Indoor or Outdoor DC Fan Motor(control chip is in fan motor) 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 100 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 101 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 102 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 103 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: • Connection wires •...
  • Page 104 TS06-INV: System lacks refrigerant diagnosis and solution Description: Judging the abnormality of the refrigeration system according to the number of compressor stops and the changes in operating parameters caused by excessive exhaust temperature. Recommended parts to prepare: • Indoor PCB •...
  • Page 105 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 106 TS08-S: Current overload protection diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Connection wires • Reactor • Outdoor fan • Outdoor PCB Troubleshooting and repair: Was the protection activated Was the protection activated in standby? in standby?
  • Page 107 TS05-N10: Refrigerant sensor error or Refrigerant sensor is out of range diagnosis and solution Description: Indoor unit receives fault signal for 10s or indoor unit does not receive feedback from refrigerant sensor for 150s. Recommended parts to prepare: • Connection wires •...
  • Page 108 TS06-N10: Refrigerant sensor detects leakage or Refrigerant sensor is out of range and leakage is detected diagnosis and solution Description: The refrigerant sensor detects a concentration higher than or equal to 10%*LFL for 10 seconds or the refrigerant sensor detects a concentration higher than or equal to 20%*LFL or the multi model receives the refrigerant leakage protection fault sent by the outdoor unit.
  • Page 109 TS09-S: ODU IPM module protection 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. Recommended parts to prepare: • Connection wires •...
  • Page 110 TS10-S: ODU 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 • Reactor Troubleshooting and repair: Check the power supply.
  • Page 111 TS11-S-INV: Compressor top (or IPM) temp. protection diagnosis and solution Description: If the temperature of IPM module is higher than a certain value, the LED displays the failure code. Recommended parts to prepare: • Connection wires • Outdoor PCB • IPM module board •...
  • Page 112 TS12-S: Inverter compressor drive error diagnosis and solution Description: 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. Recommended parts to prepare: • Connection wires •...
  • Page 113 TS26-INV: System Pressure protection(low or high pressure) diagnosis and solution Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa or 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: •...
  • Page 114 High pressure protection High pressure protection Are the high pressure switch Are the high pressure switch Connect high pressure switch and Connect high pressure switch and and main control boar wired and main control boar wired mian control board mian control board correctly? correctly? Is the high pressure...
  • Page 115 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 116 TS14: IDUs mode conflict (match with multi outdoor unit) Description: The indoor units cannot work cooling mode and heating at same time. Heating mode has a priority. • Suppose Indoor unit A working in cooling mode or fan mode, and indoor unit B is set to heating mode, then A will change to off and B will work in heating mode.
  • Page 117 TS27-INV: High temperature protection of condenser diagnosis and solution Description: When the outdoor pipe temperature is more than 65°C, the unit stops. It starts again only when the outdoor pipe temperature is less than 52°C. Recommended parts to prepare: • Connection wires •...
  • Page 118 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 119 TS31: Communication error between outdoor main chip and compressor driven chip diagnosis and solution Description: The main PCB cannot detect the IPM board. Recommended parts to prepare: • Connection wires • IPM board • Outdoor main PCB • Electric control box Troubleshooting and repair: Is there at least one LED in the compressor driven chip light?
  • Page 120 TS32: Discharge temperature protection of compressor diagnosis and solution Description: If the compressor discharge temperature exceeds a certain level for nine seconds, the compressor ceases operation, the LED displays the failure code Recommended parts to prepare: • Connection wires • Discharge temperature sensor •...
  • Page 121 TS38: Lack phase failure of ODU DC fan motor diagnosis and solution Description: When the three-phase sampling current of the DC motor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code. Recommended parts to prepare: •...
  • Page 122 TS39: ODU compressor lack phase protection diagnosis and solution Description: When the three-phase sampling current of the compressor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code Recommended parts to prepare: •...
  • Page 123 TS40: ODU IR chip drive failure diagnosis and solution Description: When the IR chip detects its own parameter error, the LED displays the failure code when power on. Recommended parts to prepare: • Inverter module PCB. Troubleshooting and repair: Power off,then restart the unit 2 minutes later.

  • Page 124: 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 the temperature sensor from PCB (Refer to Chapter Indoor&Outdoor Unit Disassembly). 2.
  • Page 125 KTF235D22UMT Resistance Value KSM135D23UFZ KTN110D42UFZ KSN140D21UFZ KTM140D78UFZ3 ATF235D22TMT KTM240D46UKT2 KTF250D22UMT Blue-Red 1.72±5%Ω 1.82±5%Ω 1.28±5%Ω 1.5±5%Ω 0.75±5%Ω 1.04±5%Ω Blue-Black (at 20°C/68°F) (at 20°C/68°F) (at 20°C/68°F) (at 20°C/68°F) (at 20°C/68°F) (at 20°C/68°F) Red-Black Resistance Value KSN140D58UFZ KTM240D43UKT KSN98D64UFZ3 ASN140D35TFZ KTF420D62UNT ASN108D22TEZ Blue-Red 1.86±5%Ω...

  • Page 126: Ipm Continuity Check

    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. Turn off outdoor unit and disconnect power supply. 2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged. 3.
  • Page 127 Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.4 4-way Valve Check 1. Power on, use a digital tester to measure the voltage, when the unit operates in cooling, it is 0V. When the unit operates in heating, it is about 230VAC.
  • Page 128 2 Turn off the power, use a digital tester to measure the resistance. The value should be 1.8~2.5 K±5%Ω. Troubleshooting  ...
  • Page 129 8.5 EXV Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Disconnect the connector from outdoor PCB. 2. Measure the resistance value of each winding using a multi-meter. 3.
  • Page 130 Appendix Contents Temperature Sensor Resistance Value Table for TP (°C --K) ........2 Other Temperature Sensors Resistance Value Table (°C – K) ......3 iii) System Pressure Table ...................4...
  • Page 131 i) Temperature Sensor Resistance Value Table for TP (°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 542.7 68.66...
  • Page 132 ii) Other Temperature Sensors Resistance Value Table (°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 2.11241 0.57683 89.5865...
  • Page 133 iii) System Pressure Table-R454B Pressure Temperature Pressure Temperature °C °F °C °F 58.196 0.58 8.44 935.23 9.35 135.64 46.4 61.517 0.62 8.92 -74.2 963.75 9.64 139.78 48.2 64.988 0.65 9.43 -72.4 992.93 9.93 144.01 68.615 0.69 9.95 -70.6 1022.8 10.23 148.34 51.8 72.402...
  • Page 134 422.31 4.22 61.25 2956.5 29.57 428.79 125.6 437.92 4.38 63.51 3025 30.25 438.72 127.4 453.98 4.54 65.84 3094.7 30.95 448.83 129.2 470.47 4.70 68.23 3165.7 31.66 459.13 487.43 4.87 70.69 10.4 3238.1 32.38 469.63 132.8 504.84 5.05 73.22 12.2 3311.7 33.12 480.30 134.6...

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