Carrier 42QHP09E8S Service Manual
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Carrier 42QHP09E8S Service Manual

Oasis plus 3d inverter series
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OASIS PLUS 3D INVERTER SERIES
2018 SERVICE MANUAL
R32

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  • Page 1 OASIS PLUS 3D INVERTER SERIES 2018 SERVICE MANUAL...

  • Page 3: Table Of Contents

    Table of Contents Page 1. Safety Precautions ..................1 Precautions Information servicing 2. Specifications ....................7 Model Reference Electrical Wiring Diagrams 3. Product Features ................... 12 Operation Modes and Functions 4. Maintenance and Disassembly ..............19 Maintenance Disassembly 5. Troubleshooting .................... 48 Safety Caution General Troubleshooting Error Diagnosis and Troubleshooting Without Error Code...

  • Page 5: Safety Precautions

    Safety Precautions Contents Precautions ......................2 Information servicing ....................3...

  • Page 6: Precautions

    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 7: Information Servicing

    2. Information servicing hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area • Prior to beginning work on systems containing flammable • Ensure that the area is in the open or that it is adequately refrigerants, safety checks are necessary to ensure that the ventilated before breaking into the risk of ignition is minimized.
  • Page 8 • 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 9 • 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 10 • 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 11: Specifications

    Specifications Contents Model Reference ....................8 Electrical Wiring Diagrams ..................9 Indoor Unit ....................9 Outdoor Unit ....................11...

  • Page 12: Model Reference

    1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. Indoor Unit Model Outdoor Unit Model Capacity (Btu) Power Supply 42QHP09E8S 38QHP09E8S 220-240V~, 50Hz, 1Phase 38QHP12E8S 42QHP12E8S ...

  • Page 13: Electrical Wiring Diagrams

    2. Electrical Wiring Diagrams Indoor unit Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LIVE NEUTRAL Heater The Electric Heating Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger OPTIONAL OPTIONAL INDOOR WIRING DIAGRAM Applicable to...
  • Page 14 Outdoor Unit Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alternating Current FAN DC-FAN Direct Current FAN AC Current Detector COMP Compressor Coil Temperature of Condenser Outdoor Ambient Temperature Compressor Suction Temperature Compressor Discharge Temperature Electric Expansive Valve L-PRO Low Pressure Switch H-PRO High Pressure Switch ...

  • Page 15: Outdoor Unit

    16022000019069 Applicable to Applicable to the units adopting the units adopting DC motor only AC motor only H EATER 2 C N 4( C N 5) OPTIONAL: CN30 BLUE YELLOW （ ） BLACK(BLUE) TO I NDO O R UNI T PO W ER SUPPLY ...

  • Page 16: Product Features

    Product Features Contents Operation Modes and Functions ................13 Abbreviation ....................13 Safety Features ....................13 Display Function ..................13 Fan Mode ....................14 Cooling Mode .....................14 Heating mode .....................14 Auto-mode ....................15 Drying Mode ....................15 Forced Operation Function ................16 1.10 Timer Function ....................16 1.11 Sleep Function .....................16 1.12 Auto-Restart Function ..................16 1.13 8°C Heating ....................16...

  • Page 17: Operation Modes And Functions

    1. Operation Modes and Functions conditioner continues operation and displays the corresponding error code, allowing for emergency use. • When more than one temperature sensor is Abbreviation malfunctioning, the air conditioner ceases operation. Unit element abbreviations Abbreviation Element Display Function Indoor room temperature Unit display functions Coil temperature of evaporator...

  • Page 18: Fan Mode

    Fan Mode fault. • Change setting temperature. When fan mode is activated: • Turbo or sleep function on/off • The outdoor fan and compressor are stopped. • Various frequency limit shutdown occurs. • Temperature control is disabled and indoor room Note: CDIFTEMP is EEPROM setting parameter.

  • Page 19: Auto-Mode

    1.6.1 Compressor Control 1.6.3 Outdoor Fan Control: 1) Reach the configured temperature • The outdoor unit will be run at different fan speed according to T4 and compressor running frequency. • If the following conditions are satisfied, the • For different outdoor units, the fan speeds are compressor ceases operation.

  • Page 20: Forced Operation Function

    until room temperature exceeds 12°C. • The sleep function is available in cooling, heating, or auto mode. Forced operation function • The operational process for sleep mode is as follows: • When cooling, the temperature rises 1°C (to not • Forced cooling mode: higher than 30°C) every hour.

  • Page 21: Self Clean(Optional)

    1.17 Silence (Optional) • When there’s any one temperature sensor in malfunction, the AC will quit ECO mode . Press “Silence” on the remote control to enable the • Indoor fan will run at auto fan when enter into the SILENCE function.
  • Page 22 Displayed code Explanation Additional Notes T1 temperature T2 temperature T3 temperature T4 temperature TP temperature Targeted Frequency Targeted frequency Actual Frequency Actual frequency Compressor current Outdoor AC voltage Indoor capacity test Reserve Running mode Outdoor fan speed Outdoor fan speed EXV opening angle EXV opening angle Indoor fan speed...

  • Page 23: Maintenance And Disassembly

    Maintenance and Disassembly Contents Maintenance ......................20 First Time Installation Check ................20 Refrigerant Recharge ...................22 Re-Installation .....................23 1.3.1 Indoor Unit ..................23 1.3.2 Outdoor Unit ................25 Disassembly ......................27 Indoor Unit ....................27 Outdoor Unit ....................38...

  • Page 24: Maintenance

    1. Maintenance First Time Installation Check To prevent air and moisture from affecting the air Air and moisture trapped in the refrigerant system affects conditioner’s performance, the indoor unit, as well as the the performance of the air conditioner by: pipes between the indoor and outdoor unit, must be be •...
  • Page 25 Procedure: (14.5 Psi) after 50 minutes, check for leakage. Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves • If the pressure successfully reaches -0.1 MPa are closed. (14.5 Psi), fully close the Handle Lo valve, then cease vacuum pump operations.

  • Page 26: Refrigerant Recharge

    Refrigerant Recharge Prior to recharging the refrigerant, confirm the additional amount of refrigerant required using the following table: Models Standard length Max. elevation Max. length Additional refrigerant 9k&12k 5m (16.4ft) 10m (32.8ft) 25m (82.0ft) 12g/m (0.13oz/ft) Procedure: Tighten the flare nuts of the indoor and outdoor and record the starting weight.

  • Page 27: Re-Installation

    Re-Installation 1.3.1 Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: (14.5 Psi). Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests Connect the charge hose with the push pin of Handle between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi).
  • Page 28 Air purging with vacuum pump Procedure: (14.5 Psi) after 50 minutes, check for leakage. Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves • If the pressure successfully reaches -0.1 MPa are closed.

  • Page 29: Outdoor Unit

    1.3.2 Outdoor Unit Evacuation for the whole system Procedure: Wait for five 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 30 Procedure: Tighten the flare nuts of the indoor and outdoor and record the starting weight. units, and confirm that both the 2- and 3-way valves Fully open the Handle Lo manifold valve, 2- and are closed. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode and 3-way service port.

  • Page 31: Disassembly

    2. Disassembly Indoor unit Front Panel Procedure Illustration 3) Hold the front panel by the tabs on Front Panel the both sides and lift it (see CJ_OP_ INV_001). CJ_OP_INV_001 4) Push up the bottom of an air filter while pressing the bottom of the middle parts, and then pull the air filter out downwards (see CJ_OP_ INV_002).
  • Page 32 Procedure Illustration 5) Open the horizontal louver and push the hook towards right to open it (see CJ_OP_INV_003). Horizontal Louver Hook CJ_OP_INV_003 6) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_OP_INV_004).
  • Page 33 Procedure Illustration 7) Remove 1 screw and then remove the electrical cover(see CJ_OP_INV_005). 8) Disconnect the two connectors for display board(see CJ_OP_INV_005) . CJ_OP_INV_005 9) Slid the front panel side to side to release each axis (see CJ_OP_INV_006) CJ_OP_INV_006 10) Remove one screw and rotate the display board clockwise.
  • Page 34 Procedure Illustration 11) Open the screw caps(2) and then remove the 4 screws (see CJ_OP_ INV_008). 12) Release the 2 hooks. CJ_OP_INV_008 13) Release the 5 hooks in the back (see CJ_OP_INV_009). 14) Pull out the panel frame from the indoor unit.
  • Page 35 Electrical parts Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration 1) Cut the ribbon by a shear, then pull Ground Screws out the coil temperature sensor (T2) (see CJ_OP_INV_010). T2 Sensor 2) Remove the two screws used for the ground connection (see CJ_OP_ INV_010).
  • Page 36 Procedure Illustration 5) Disconnect the wires. Then remove the electronic main box (CJ_OP_INV_011- 6) Pull out the Electrical control box along the direction indicated in right image. to remove it (CJ_OP_INV_011-2). Main Board Electronic Box CJ_OP_INV_012 Pipe Temperature Sensor 7) The connector of each port is indicated in right image.
  • Page 37 Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_OP_INV_014). Pipe Holder CJ_OP_INV_014 2) Remove the 3 screws on the evaporator located at the fixed plate (see CJ_OP_ INV_015).
  • Page 38 Procedure Illustration 4) Remove 1 screw on the evaporator located at the top of the evaporator. (see CJ_OP_ INV_017). CJ_OP_INV_017 Evaporator 5) Pull out the evaporator (see CJ_OP_ INV_017). CJ_OP_INV_017 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 39 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_OP_ INV_018).
  • Page 40 Procedure Illustration 3) Remove the fixing screw (see CJ_OP_ INV_020). 4) Pull out the fan motor and fan assembly from the side. Fixing Screw CJ_OP_INV_021 Note: This section is for reference only. Actual unit appearance may vary.  Page 36 ...
  • Page 41 Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the two screws, then remove the stepping motor (see CJ_OP_INV_021). Stepping Motor CJ_OP_INV_021 INTELLIGENT EYE Note: Remove the front panel and electrical parts (refer to 1.

  • Page 42: Outdoor Unit

    Outdoor unit Panel Plate 38QHP09E8S 38QHP12E8S Procedure Illustration 1) Turn off the air conditioner and the power breaker. Big Handle 2) Remove the screws of the big handle and then remove the big handle (1 screws) (see CJ_B30_INV_001). Top Cover CJ_B30_INV_001 3) Remove the screws of the top cover and then remove the top cover (3...
  • Page 43 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_B30_INV_003). Front Panel CJ_B30_INV_003 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_B30_ INV_004).
  • Page 44 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_B30_INV_005). Right Panel CJ_B30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 40 ...
  • Page 45 Fan disassembly Note: Remove the panel plate and (refer to 1. Panel plate) before disassembling fan. 38QHP09E8S 38QHP12E8S Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_001 ). 2) Remove the fan. D-cut CJ_ODU_INV_001 Hook 3) Unfix the hooks and then open the electronic control box cover (4 hooks)
  • Page 46 Procedure Illustration 4) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_003 ). CJ_ODU_INV_003 5) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_004 ). 6) Remove the fan motor. Fan Motor CJ_ODU_INV_004 Note: This section is for reference only.
  • Page 47 Electrical parts Note: Remove the panel plate and fan assembly (refer to 1. Panel plate and 2. Fan assembly) before disassembling electrical parts. 38QHP09E8S 38QHP12E8S Procedure Illustration 4-Way Valve 1) Remove the connector for the compressor (see CJ_ODU_INV_005 ). 2) Pull out the two blue wires connected with the four way valve (see CJ_ODU_ Reactor INV_005 ).
  • Page 48 Sound blanket WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_INV_006 ).
  • Page 49 Four-way valve WARNING: Recover refrigerant from the refrigerant circuit before remove the four-way valve. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling four-way valve. Procedure Illustration 1) Heat up the brazed parts and then detach...
  • Page 50 Compressor WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling compressor. Procedure Illustration 1) Remove the flange nut of terminal cover and remove the terminal cover (see CJ_ ODU_INV_008 ).
  • Page 51 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_INV_010 ). CJ_ODU_INV_010 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_INV_011 ). 5) Lift the compressor from the base pan Discharge Pipe assembly with pliers.

  • Page 52: Troubleshooting

    Troubleshooting Contents Safety Caution .....................50 General Troubleshooting ..................51 Error Diagnosis and Troubleshooting Without Error Code .......52 Remote maintenance ...................52 Field maintenance ..................53 Quick Maintenance by Error Code ..............58 Troubleshooting by Error Code ................59 Common Check Procedures.................59 E0/F4/EA (EEPROM parameter error) ............61 E1 (Indoor and outdoor unit communication error) ........62 E3/F5 (Fan speed is operating outside of the normal range) ......64 EF (Intelligent eye module error diagnosis and solution) .......66...
  • Page 53 Troubleshooting Contents 5.10 P1(Over voltage or too low voltage protection diagnosis and solution) ..71 5.11 P2(High temperature protection of IPM module diagnosis and solution) ..73 5.12 P4(Inverter compressor drive error diagnosis and solution) ......74...

  • Page 54: Safety Caution

    1. Safety Caution WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. Electrolytic Capacitors For other models, connect discharge resistance (approx.100Ω 40W) or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor.

  • Page 55: General Troubleshooting

    2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error, an error code will be displayed. These error codes are described in the following table: Display Error Information Solution E0/EA Indoor unit EEPROM parameter error Page 61 Indoor / outdoor units communication error Page 62...

  • Page 56: Error Diagnosis And Troubleshooting Without Error Code

    3. 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 Page 54-55...

  • Page 57: Field Maintenance

    Field maintenance Problem Solution Unit will not start Page 56-57 Compressor will not start but fans run Page 56-57 Compressor and condenser (outdoor) fan will not start Page 56-57 Evaporator (indoor) fan will not start Page 56-57 Condenser (Outdoor) fan will not start Page 56-57 Unit runs, but shortly stops Page 56-57...
  • Page 58 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 59 Others ☆ ☆ ☆ ☆ ☆ ☆ ☆  Page 55 ...
  • Page 60 Electrical Circuit 2.Field Maintenance Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...
  • Page 61 Refrigerant Circuit Others ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆...

  • Page 62: Quick Maintenance By Error Code

    4. Quick Maintenance by Error Code If you do not have the time to test whether 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 63: Troubleshooting By Error Code

    5. Troubleshooting by Error Code Common Check Procedures 5.1.1 Temperature Sensor Check 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.(Tp) sensor.
  • Page 64 5.1.3 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. Normal resistance Normal resistance Digital tester Digital tester value value...

  • Page 65: E0/F4/Ea (Eeprom Parameter Error)

    E0/F4/EA (EEPROM parameter error) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Outdoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later. Is it still displaying the error The unit is operating normally.

  • Page 66: E1 (Indoor And Outdoor Unit Communication Error)

    E1 (Indoor and outdoor unit communication error) Description: The indoor unit has not received feedback from the outdoor unit for 150 seconds, four consecutive times. Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Reactor Troubleshooting and repair: Power off, then restart the unit after 2 minutes.
  • Page 67 Remarks: • Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. • When AC is normal running, the voltage is moving alternately as positive values and negative values. •...

  • Page 68: E3/F5(Fan Speed Is Operating Outside Of The Normal Range)

    E3/F5(Fan speed is operating outside of the normal range) Description: When the indoor fan speed keeps too low (300RPM) or too high (1500RPM) for certain time, the unit will stop and the LED will display the failure(E3). When the outdoor fan speed registers below 200RPM or over 1500RPM for an extended period of time, the unit will stop and the LED will display the failure(F5).
  • Page 69 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 70: Ef (Intelligent Eye Module Error Diagnosis And Solution)

    EF (Intelligent eye module error diagnosis and solution) Description: If the intelligent eye module malfunctions, the LED will display the failure. Recommended parts to prepare: • Intelligent eye Troubleshooting and repair: Power off, then restart the unit 2 minutes later. Is it still displaying The unit operates normally.

  • Page 71: E4/E5/F1/F2/F3

    E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis and solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Recommended parts to prepare: • Wiring mistake • Faulty sensor •...

  • Page 72: Eb (Communication Error Between The Indoor Pcb And Display Board)

    Eb (Communication error between the indoor PCB and display board) Description: Indoor PCB does not receive feedback from Display board. Recommended parts to prepare: • Wiring mistake • PCB faulty • Display board malfunction Troubleshooting and repair: Power off, then restart the unit 2 minutes later.

  • Page 73: F0(Overload Current Protection Diagnosis And Solution)

    F0(Overload current protection diagnosis and solution) Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Power supply problems. • System blockage • Faulty PCB • Wiring mistake • Compressor malfunction Troubleshooting and repair: Check the power supply.

  • Page 74: P0(Ipm Malfunction Or Igbt Over-Strong Current Protection Diagnosis And Solution)

    P0(IPM malfunction or IGBT over-strong current protection diagnosis and solution) Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “P0” and the AC turn off. Recommended parts to prepare: • Wiring mistake •...
  • Page 75 5.10 P1(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 issues • System leakage or blockage •...
  • Page 76 Remark: • Measure the DC voltage between P and N port. The normal value should be around 310V.  Page 72 ...
  • Page 77 5.11 P2(High temperature protection of IPM module diagnosis and solution) Description: If the temperature of IPM module is higher than limited value, the LED displays this failure code. Recommended parts to prepare: • Faulty PCB • Connection problems Troubleshooting and repair: Check the fastening screws on the PCB and IPM radiator.
  • Page 78 5.12 P4(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: • Wiring mistake •...

  • Page 79: Appendix

    Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..76 Temperature Sensor Resistance Value Table for TP (°C – K)......77 iii) Pressure On Service Port ..................78...
  • Page 80 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 81 ii) 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...
  • Page 82 iii) Pressure On Service Port(R32) Cooling chart: °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) 70/59 10.3 10.8 75/63 10.9 11.4 80/67 11.4 12.1 90/73 10.7 10.5 10.2 10.8 12.6 13.3 °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89)
  • Page 83 Heating chart: 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) 30.9 29.1 25.8 23.3 21.2 18.9 16.8 33.2 30.6 27.1 25.9 23.8 20.9 19.4 34.5 32.1 28.4 26.8 25.4 21.9 20.4 57/53 47/43 37/33 27/23...

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