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INVENTOR AR5VI-12WiFi Service Manual
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INVENTOR AR5VI-12WiFi Service Manual

INVENTOR AR5VI-12WiFi Service Manual

Air conditioning systems wall mounted unit
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AIR CONDITIONING SYSTEMS
WALL MOUNTED UNIT
• SERVICE MANUAL
MODELS:
AR5VI-09WiFi
AR5VI-12WiFi
AR5VI-18WiFi
AR5VI-24WiFi
AR5VI-09WFI/AR5VO-09
AR5VI-12WFI/AR5VO-12
AR5VI-18WFI/AR5VO-18
AR5VI-24WFI/AR5VO-24
ENGLISH

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Summary of Contents for INVENTOR AR5VI-12WiFi

  • Page 1 AIR CONDITIONING SYSTEMS WALL MOUNTED UNIT • SERVICE MANUAL MODELS: AR5VI-09WiFi AR5VI-12WiFi AR5VI-18WiFi AR5VI-24WiFi AR5VI-09WFI/AR5VO-09 AR5VI-12WFI/AR5VO-12 AR5VI-18WFI/AR5VO-18 AR5VI-24WFI/AR5VO-24 ENGLISH...
  • Page 2 Table of Contents §. Safety Precautions Precautions Information servicing(For ammable materials) §. Speci cations 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 3 Table of Contents §. Troubleshooting Safety Caution General Troubleshooting Information Inquiry Error Diagnosis and Troubleshooting Without Error Code Quick Maintenance by Error Code Troubleshooting by Error Code Check Procedures Appendix Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) Temperature Sensor Resistance Value Table for TP(for some units) (°C –...

  • Page 5: Safety Precautions

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

  • Page 6: 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 7 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 ammable materials) hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area •...
  • 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 ammable refrigerants the system;...

  • Page 9: 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 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: Speci Cations

    Speci cations Contents Model Reference ....................2 Pipe Length and Drop Height ................3 Electrical Wiring Diagrams ..................4...

  • Page 12: 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 AR5VI-09WiFi and AR5VI-09WFI AR5VO-09 AR5VI-12WiFi and AR5VI-12WFI AR5VO-12 220-240V~, 50Hz, 1Phase AR5VI-18WiFi and AR5VI-18WFI AR5VO-18 AR5VI-24WiFi and AR5VI-24WFI AR5VO-24 Specifications 2...
  • Page 13 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: Electrical Wiring Diagrams

    Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram AR5VI-09WiFi and AR5VI-09WFI AR5VO-09 AR5VI-12WiFi and AR5VI-12WFI AR5VO-12 16022000019533 16022000003662 AR5VI-18WiFi and AR5VI-18WFI AR5VO-18 AR5VI-24WiFi and AR5VI-24WFI AR5VO-24 16022000B13817 Outdoor unit printed circuit board diagram...
  • Page 15 Indoor unit abbreviations 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 Outdoor unit abbreviations Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE...
  • Page 17 Outdoor unit wiring diagram: 16022000019533...
  • Page 19 Outdoor unit printed circuit board diagram: 17122000048121...
  • Page 20 Name Meaning Earth: connect to Ground N_in: connect to N-line (208-230V AC input) CN1A L_in: connect to L-line (208-230V AC input) CN16 S: connect to indoor unit communication HEAT1 CN17 connect to compressor heater, 208-230V AC when is ON 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
  • Page 21 Outdoor unit printed circuit board diagram: 17122000048064 RC 2 VU B...
  • Page 22 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (208-230V AC input) L_in: connect to L-line (208-230V AC input) S: connect to indoor unit communication 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON. AC-FAN connect to AC fan HEAT2...

  • Page 23: Table Of Contents

    Product Features Contents Display Function ....................2 Safety Features ......................3 Basic Functions .......................4 Table ......................4 Abbreviation ....................5 Fan Mode ......................5 Cooling Mode ....................5 Heating Mode(Heat Pump Units) ..............5 Auto-mode ....................7 Drying Mode ....................7 Forced Operation Function ................7 Sleep Function ....................7 3.10 Auto-Restart Function ..................7 3.11 Refrigerant Leakage Detection ...............8 3.12 Ionizer/Plasma (for some models) ..............8 Optional Functions ....................9...

  • Page 24: Display Function

    1. Display Function Unit display functions Display Function Fresh(available on select units only) Defrost When the unit is on When TIMER is on ECO function (available on select units only) Lights up in different colour according to the operation mode(some units)： Under COOL and DRY mode, it displays as cool colour.Under HEAT mode, it displays as warm colour.

  • Page 25: Safety Features

    2. Safety Features Compressor three-minute delay at restart Compressor functions are delayed for up to one minute upon the first startup of the unit, and are delayed for up to three minutes upon subsequent unit restarts. Zero crossing detection error protection(Except for DC fan units) If AC can not detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure.

  • Page 26: Basic Functions

    3. Basic Functions Table Cooling Mode&Heating mode Heating Mode Functions Auto Mode Outdoor Fan Control Defrosting Mode Case 1: Compressor Case 1:T3 and Case 2: A=2°C(3.6°F), Cases Case 2:T4 Frequency and T4 T4,15 min T3,10 min B=-2°C(-3.6°F) Models Note: The detailed description of case 1 or case 2 is shown in the following function sections(from 3.4 to 3.6). Product Features...

  • Page 27: Abbreviation

    auto. Abbreviation • If the compressor ceases operation when the Unit element abbreviations configured temperature is reached, the indoor fan motor operates at the minimum or configured speed. Abbreviation Element • The indoor fan is controlled as below: Indoor room temperature Setting fan T1-Td (°F)

  • Page 28: Indoor Fan Control

    parameter of EEPROM. It’s value ranges from -6°C to 6°C. • When T1-Ts>- T3, the compressor ceases operation. T1-Td • When T1-Ts<- T3-1.5°C (2.7°F ), the compressor continues operation. • When the AC is operating in mute mode, the compressor operates at a low frequency. •...

  • Page 29: Auto-Mode

    • If any one of the following conditions is satisfied, • Forced auto mode: defrosting ends and the machine switches to normal Forced auto mode operates the same as normal auto mode heating mode: with a preset temperature of 24°C (76°F). •...

  • Page 30: Refrigerant Leakage Detection

    failure, will restore those setting automatically within 3 3.11 Refrigerant Leakage Detection minutes after power returns. With this new technology, the display area will show “EC” • If the unit was in forced cooling mode, it will run in when the outdoor unit detects refrigerant leakage. this mode for 30 minutes and turn to auto mode with temperature set to 24°C (76°F) .

  • Page 31: Optional Functions

    4. Optional Functions Follow me • If you press “Follow Me” on the remote, the indoor 8°C Heating unit will beep. This indicates the follow me function is active. In heating mode, the temperature can be set to as low as 8°C, preventing the indoor area from freezing if •...

  • Page 32: Maintenance

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

  • Page 33: 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 34 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 35: Refrigerant Recharge

    2. Refrigerant Recharge m A 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 36: 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 37 Air purging with vacuum pump Procedure: Tighten the flare nuts of the indoor and outdoor • If the pressure successfully reaches -0.1 MPa (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 38: 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 39: Refrigerant Charging

    Refrigerant charging m A 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 40 Indoor Unit Disassembly Contents Dimension ......................2 Indoor Unit Disassembly(7k~24k).................3 Front Panel ....................3 Electrical parts ....................9 Evaporator ....................13 Fan motor and fan ..................15 Step motor ....................17 Drain Hose ....................18 Indoor Unit Disassembly(27k~36k)..............19 Front Panel ....................19 Electrical parts .....................26 Evaporator ....................28 Fan motor and fan ..................30 Step motor ....................32 Drain Hose ....................34...

  • Page 41: Dimension

    1. Dimension Capacity Body Code W(mm) D(mm) H(mm) 9K~12K 12K~18K 18K~24K 1080 Indoor Unit Disassembly 2...

  • Page 42: Indoor Unit Disassembly(7K~24K)

    2. Indoor Unit Disassembly 2.1 Front Panel Procedure Illustration 1) Hold the front panel by the tabs on Front Panel the both sides and lift it (see CJ_ AB_001). CJ_AB_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_AB_002).
  • Page 43 Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AB_003). Horizontal Louver Hook CJ_AB_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AB_004).
  • Page 44 Procedure Illustration 5) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it. (see CJ_AB_005). CJ_AB_005 6) Disconnect the connector for display board. (see CJ_AB_006) . CJ_AB_006 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 5...
  • Page 45 Procedure Illustration 7) Slid the front panel side to side to release each axis (see CJ_AB_007) CJ_AB_007 8) Open the screw cap and then remove the 3 screws (see CJ_AB_008). CJ_AB_008 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 6...
  • Page 46 Procedure Illustration 9) Release the hooks with hands. (see CJ_AB_009) CJ_AB_009 10) Release the 5 hooks in the back (see CJ_AB_010). CJ_AB_010 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger.
  • Page 47 Procedure Illustration 12) Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see CJ_ AB_012). CJ_AB_012 13) Remove 1 screw of the display board. (see CJ_AB_013). 14) Rotate the display board in the direction shown in the right picture.

  • Page 48: Electrical Parts

    2.2 Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration Ground Screws 1) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB_014).
  • Page 49 Procedure Illustration 4) Remove the fixed devices of the connectors (see CJ_AB_016). CJ_AB_016 5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see CJ_AB_017). CJ_AB_017 6) Open the left side plate of electronic control box (see CJ_AB_018). CJ_AB_018 Note: This section is for reference only.
  • Page 50 Procedure Illustration 7) Open the two clips on the front of the electric box. (see CJ_AB_019) CJ_AB_019 8) Open the upper cover plate of electronic control box (see CJ_ AB_020). CJ_AB_020 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 11...
  • Page 51 Procedure Illustration 9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see CJ_AB_021). CJ_AB_021 Display board 10) Pull out the electrical main board along the direction indicated in right image to remove it (see CJ_AB_022). Terminal (1L) Terminal (W) Terminal (S)

  • Page 52: Evaporator

    2.3 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_AB_023). CJ_AB_023 2) Remove the 1 screws on the evaporator located at the fixed plate (see CJ_AB_024).
  • Page 53 Procedure Illustration 3) Release the hook on the evaporator (see CJ_AB_025). CJ_AB_025 Remote the one screw on the evaporator located at the fixed plate (see CJ_AB_026). CJ_AB_026 4) Pull out the evaporator (see CJ_AB_027). CJ_AB_027 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 14...

  • Page 54: Fan Motor And Fan

    2.4 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_ AB_028).
  • Page 55 Procedure Illustration 3) Remove the fixing screw (see CJ_AB_030). 4) Pull out the fan motor and fan assembly from the side. CJ_AB_030 Fixing Screw Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 16...

  • Page 56: Step Motor

    2.5Step 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_AB_031). Stepping Motor CJ_AB_031 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 17...

  • Page 57: Drain Hose

    2.6 Drain Hose Procedure Illustration 1) Rotate the fixed wire clockwise indicated in right image (see CJ_AB_032). CJ_AB_032 2) Pull up the drain hose to remove it (see CJ_AB_033). CJ_AB_033 Note: This section is for reference only. Actual unit appearance may vary. Indoor Unit Disassembly 18...
  • Page 58 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Dimension ......................3 Outdoor Unit Disassembly ..................7 Panel Plate ..................... 7 Electrical Parts .....................16 Fan Assembly ....................19 Fan Motor ....................20 Sound blanket .....................21 Four-way valve .....................22 Compressor ....................23...

  • Page 59: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board AR5VO-09 X130 PCB Board 9 AR5VO-12 X230 PCB Board 9 AR5VO-18 X330 PCB Board 9 AR5VO-24 X430 PCB Board 6 Note: The detailed description of PCB Board is shown in the following section 3.2 Electrical Parts. Outdoor Unit Disassembly 2...

  • Page 60: Dimension

    2. Dimension X130 Panel Plate Outdoor Unit Disassembly 3...
  • Page 61 X230 Panel Plate Outdoor Unit Disassembly 4...
  • Page 62 X330 Panel Plate Outdoor Unit Disassembly 5...
  • Page 63 X430 Panel Plate Outdoor Unit Disassembly 6...

  • Page 64: Panel Plate

    3. Outdoor Unit Disassembly Panel Plate 1. X130 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X130_001). Big Handle CJ_X130_001 Top Cover 3) Remove the screws of the top cover...
  • Page 65 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X130_003). Water Collecting Cover CJ_X130_003 5) Remove the screws of the front panel and then remove the front panel (6 screws(onoff models) or 8 screws(inverter models) (see CJ_ X130_004).
  • Page 66 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X130_005). Right Panel CJ_X130_005 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 9...
  • Page 67 2. X230/X330 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screws) (see CJ_X230_001). Big Handle CJ_X230_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (4 screws).
  • Page 68 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X230_003). Water Collecting Cover CJ_X230_003 5) Remove the screws of the front panel and then remove the front panel (7 screws(onoff models) or 9 screws(inverter models) (see CJ_ X230_004).
  • Page 69 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X230_005). Right Panel CJ_X230_005 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 12...
  • Page 70 3. X430 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X430_001). Big Handle CJ_X430_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 71 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X430_003). Water Collecting Cover CJ_X430_003 5) Remove the screws of the front panel and then remove the front panel (7 screws(onoff models) or 9 screws(inverter models) (see CJ_ X430_004).
  • Page 72 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_X430_005). Right Panel CJ_X430_005 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 15...

  • Page 73: Electrical Parts

    Electrical parts Antistatic gloves must be worn when you disassemble the electronic box. WARNING: Note: Remove the air outlet grille(refer to 3.1 Panel Plate) before disassembling electrical parts. PCB for Inverter Models 1. PCB board 6 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (5 screws and 2 CJ_ODU_PCB_006-1 ).
  • Page 74 2. PCB board 9 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_ wire(1 screw). (see PCB_009-1 ). 2) Pull out the wires from electrical supporting plate and turn over the CJ_ODU_PCB_009-1 electronic control assembly. (see CJ_ODU_PCB_009-2 ).
  • Page 75 Procedure Illustration 4) Remove the fixing board (2 hooks) CJ_ODU_PCB_009-4 ). (see CJ_ODU_PCB_009-4 5) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_009-5 ). CJ_ODU_PCB_009-5 6) Then remove the electronic control board (4 hooks).(see CJ_ODU_ PCB_009-6 ). CJ_ODU_PCB_009-6 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 18...

  • Page 76: Fan Assembly

    Fan Assembly Note: Remove the panel plate (refer to 3.1 Panel Plate) before disassembling fan. Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ FAN_001). 2) Remove the fan. D-cut CJ_ODU_FAN_001 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 19...

  • Page 77: Fan Motor

    Fan Motor Note: Remove the panel plate and the connection of fan motor on PCB (refer to 3.1 Panel Plate and 3.2 Electrical parts) before disassembling fan motor. Procedure Illustration 3) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_MOTOR_001). 4) Remove the fan motor.

  • Page 78: Sound Blanket

    Sound blanket Note: Remove the panel plate (refer to 3.1 Panel plate) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_BLANKET_001). Sound Blanket(top) Sound Blanket(side) CJ_ODU_BLANKET_001 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 21...

  • Page 79: Four-Way Valve

    Four-way valve (for heat pump models) WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen;...

  • Page 80: Compressor

    Compressor WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen; then repeat the two steps before heating up the brazed parts. The operations above should be implemented by professionals.) Note: Remove the panel plate, connection of compressor on PCB (refer to 3.1 Panel plate and 3.2 Electrical parts) before disassembling sound blanket.
  • Page 81 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_COMP_003). CJ_ODU_COMP_003 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_COMP_004). Discharge Pipe 5) Lift the compressor from the base pan assembly with pliers.

  • Page 82: Troubleshooting

    Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Information Inquiry ....................7 Error Diagnosis and Troubleshooting Without Error Code .......10 Remote maintenance ...................10 Field maintenance ..................11 Quick Maintenance by Error Code ..............16 Troubleshooting by Error Code ................17 E0/EH 00 / F4/EC 51 (EEPROM parameter error diagnosis and solution) ..17 E1/EL 01 (Indoor and outdoor unit communication error diagnosis and solution) E2/EH 02 (Zero-crossing detection error diagnosis and solution) ....20 E3/EH 03 / F5/EC 07 (Fan speed is operating outside of the normal range...
  • Page 83 Troubleshooting Contents F0/PC 08 (Overload current protection diagnosis and solution) .....27 P0/PC 00 (IPM malfunction or IGBT over-strong current protection diagnosis and solution) ......................28 6.10 P1/PC 01 (Over voltage or too low voltage protection diagnosis and solution) 29 6.11 P2/PC 02 (High temperature protection of IPM module or High pressure protection diagnosis and solution) ...............30 6.12 P4/PC 04 (Inverter compressor drive error diagnosis and solution) ....32 6.13 P6/PC 03 (Low pressure protection diagnosis and solution) ......33...

  • Page 84: 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 85: General Troubleshooting

    2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer lamp may turn on or begin flashing, and an error code will be displayed. These error codes are described in the following tables: Operation Timer...
  • Page 86 For some models Operation Timer Error Information Solution Lamp Lamp Display 1 time Indoor unit EEPROM parameter error TS19 EH 00 2 times Indoor / outdoor unit communication error TS20 EL 01 3 times Zero-crossing signal detection error(for some models) TS22 EH 02 4 times...
  • Page 87 LED flash frequency: ..Error Display (For Some Outdoor Units) There are 2 LED lights (RED color and GREEN color) welded in outdoor main board. After power on, LED show different actions when encounter different problems. Problem LED(GREEN) LED(RED) Solution Standby normally Operate normally...

  • Page 88: Information Inquiry

    3. Information Inquiry • To enter information inquiry status, complete the following procedure within ten seconds: • Press LED(or DO NOT DISTURB) 3 times. • Press SWING(or AIR DIRECTION) 3 times. • Finish 1 and 2 within 10 seconds, you will hear beeps for two seconds, which means the unit goes into parameter checking mode.
  • Page 89 Displayed Displayed code Explanation Meaning Additional Notes value Room temperature 1. All displayed temperatures use actual values. Indoor coil temperature 2. All temperatures are -1F,-1E,-1d,-1c,- -25,-24,-23,-22, displayed in °C regardless Outdoor coil 1b,-1A -21,-20 of remote used. temperature -19—99 -19—99 3.
  • Page 90 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25 Troubleshooting 9...

  • Page 91: Error Diagnosis And Troubleshooting Without Error Code

    4. 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 TS14 - TS15...

  • Page 92: Field Maintenance

    Field maintenance Problem Solution Unit will not start TS16 - TS17 Compressor will not start but fans run TS16 - TS17 Compressor and condenser (outdoor) fan will not start TS16 - TS17 Evaporator (indoor) fan will not start TS16 - TS17 Condenser (Outdoor) fan will not start TS16 - TS17 Unit runs, but shortly stops...
  • Page 93 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 Unit is on but the wind is not cold(hot) Unit runs, but shortly stops The unit starts up and stops frequently Unit runs con�nuously but insufficient cooling(hea�ng)
  • Page 94 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 Unit runs con�nuously but insufficient cooling(hea�ng) Cool can not change to heat...
  • Page 95 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 Compressor short-cycles due to overload High discharge pressure...
  • Page 96 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 Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start Unit runs, but shortly stops Compressor short-cycles due to overload High discharge pressure Low discharge pressure...

  • Page 97: Quick Maintenance By Error Code

    5. 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 E7/Eb...

  • Page 98: Troubleshooting By Error Code

    6. Troubleshooting by Error Code E0/EH 00 / F4/EC 51 (EEPROM parameter error diagnosis and solution) 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.

  • Page 99: E1/El 01 (Indoor And Outdoor Unit Communication Error Diagnosis And Solution)

    E1/EL 01 (Indoor and outdoor unit 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 100 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 101: E2/Eh 02 (Zero-Crossing Detection Error Diagnosis And Solution)

    E2/EH 02 (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 • PCB Troubleshooting and repair: Check the connections and power supply.

  • Page 102: E3/Eh 03 / F5/Ec 07 (Fan Speed Is Operating Outside Of The Normal Range Diagnosis And Solution)

    E3/EH 03 / F5/EC 07 (Fan speed is operating outside of normal range diagnosis and solution) Description: When indoor / 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 103 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 104 3. Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V (115V power supply), the PCB must has problems and need to be replaced.

  • Page 105: E4/Eh 60/E5/Eh 61/F1/Ec 53/F2/Ec 52/F3/Ec 54/F6/Ec56 (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solution)

    E4/EH 60/E5/EH 61/F1/EC 53/F2/EC 52/F3/EC 54/F6/EC56 (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 displays the failure code. Recommended parts to prepare: •...

  • Page 106: E7/Eh 0B (Indoor Pcb / Display Board Communication Error Diagnosis And Solution)

    E7/EH 0b (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 107: Ec/El 0C (Refrigerant Leakage Detection Diagnosis And Solution)

    EC/EL 0C (Refrigerant Leakage Detection diagnosis and solution) 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 108: F0/Pc 08 (Overload Current Protection Diagnosis And Solution)

    F0/PC 08 (Overload current protection diagnosis and solution) Description: An abnormal current rise is detected by checking the speci ed current detection circuit. Recommended parts to prepare: • Outdoor PCB • Connection wires • Compressor Troubleshooting and repair: Check the power supply. Is it in working order? Stop the unit.

  • Page 109: P0/Pc 00(Ipm Malfunction Or Igbt Over-Strong Current Protection Diagnosis And Solution)

    P0/PC 00(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 LED displays the failure code and the AC turns off. Recommended parts to prepare: •...

  • Page 110: P1/Pc 01(Over Voltage Or Too Low Voltage Protection Diagnosis And Solution)

    6.10 P1/PC 01(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 •...

  • Page 111: P2/Pc 02(High Temperature Protection Of Ipm Module Or High Pressure Protection Diagnosis And Solution)

    6.11 P2/PC 02(High temperature protection of IPM module or High pressure protection diagnosis and solution) Description: If the temperature of IPM module is higher than a certain value, the LED displays the failure code. For some models with high pressure switch, outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa, the LED displays the failure code.
  • Page 112 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 113: P4/Pc 04(Inverter Compressor Drive Error Diagnosis And Solution)

    6.12 P4/PC 04(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: •...

  • Page 114: P6/Pc 03 (Low Pressure Protection Diagnosis And Solution)

    6.13 PC 03(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 •...
  • 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: Check Procedures

    7. Check Procedures 7.1 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 5&6. Indoor&Outdoor Unit Disassembly). 2.
  • Page 117 Resistance Value KSK89D53UEZ KSK89D29UEZD KSN98D22UFZ KSK103D33UEZ3 KTN150D30UFZA Blue-Red Blue-Black 2.35 1.99 2.13 1.02 1.57 Red-Black Resistance Value KSM135D23UFZ KSN140D21UFZ KTF235D22UMT KSK103D33UEZ3(YJ) KTM240D57UMT Blue-Red Blue-Black 1.72 1.28 0.75 2.13 0.62 Red-Black Resistance Value KSN140D58UFZ KTM240D43UKT KSN98D64UFZ3 Blue-Red Blue-Black 1.86 1.03 Red-Black Note: The picture and the value are only for reference, actual condition and specific value may vary.

  • Page 118: Ipm Continuity Check

    7.3 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 119: Fan Motor Check

    Fan Motor Check 1. Turn off outdoor unit and disconnect power supply 2. Disconnect outdoor fan motor power cord from outdoor PCB 3. Measure the resistance value between each windings. The normal value of different motor show as follows: YKFG-13-4-38L Model YKFG-15-4-28-1 YKFG-20-4-10L...
  • Page 120 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 121 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 122 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 123 iii) Pressure On Service Port 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)
  • Page 124 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 125 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...

  • Page 128: Wall Mounted Unit

    AIR CONDITIONING SYSTEMS WALL MOUNTED UNIT V:1.0.062022 INVENTOR A.G. S.A. Manufacturer: 24th km National Road Athens - Lamia & 2 Thoukididou Str., Ag.Stefanos, 14565 Tel.: +30 211 300 3300, Fax: +30 211 300 3333 - www.inventor.ac...

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