Airdach ACSH0924VM2-D Technical Manual
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Airdach ACSH0924VM2-D Technical Manual

High wall inverter heat pumps mini-splits
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High Wall Inverter Heat Pumps Mini-Splits
TECHNICAL MANUAL
November 2023
Version A-TM18SS-02

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  • Page 1 High Wall Inverter Heat Pumps Mini-Splits TECHNICAL MANUAL November 2023 Version A-TM18SS-02...
  • Page 2 Table of Contents §. Safety Precautions Precautions Information servicing (For flammable materials) §. Specifications Model Reference Pipe length and the Drop Height Refrigerant Cycle Diagrams Electrical Wiring Diagrams §. Product Features Display Function Safety Features Basic Features Optional Features §. Maintenance First Time Installation Check Refrigerant Recharge Re-Installation...
  • Page 3 §. Troubleshooting Safety Caution General Troubleshooting Complain Record Form 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 4: Safety Precautions

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

  • Page 5: In Case Of Accidents Or Emergency

    1. Precautions To prevent personal injury, or property or unit damage, • adhere to all precautionary measures and instructions outlined in this manual. Before servicing a unit, refer to this service manual and its relevant sections. 1.3 Operation and Maintenance Failure to adhere to all precautionary measures listed in this section may result in personal injury, damage to the unit or to property, or in extreme cases, death.

  • Page 6: Work Procedure

    2. Information servicing • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable (For flammable hazards or ignition risks. materials) • NO SMOKING signs shall be displayed. Ventilated area Checks to the area •...

  • Page 7: Detection Of Flammable Refrigerants

    • that capacitors are discharged: this shall be done in shall also take into account the effects of aging or a safe manner to avoid possibility of sparking; continual vibration from sources such as compressors or fans. • that there no live electrical components and wiring are exposed while charging, recovering or purging 2.13 Detection of flammable refrigerants the system;...

  • Page 8: Charging Procedures

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

  • Page 10: Specifications

    Specifications Contents Model Reference ................2 Pipe Length and Drop Height ............3 Refrigerant Cycle Diagrams .............. 4 Electrical Wiring Diagrams ............... 9...

  • Page 11: Model Reference

    1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model. Outdoor Unit Model Indoor Unit Model Capacity (Btu/h) Power Supply ACSH0924VM2-D AIWH0900VM2-D ACSH1222VM2-D AIWH1200VM2-D 208/230V~, 60Hz, 1Phase ACSH1823VM2-D AIWH1800VM2-D ACSH2421VM2-D AIWH2400VM2-D ACSH3618VM2 AIWH3600VM2-D...

  • Page 12: Pipe Length And Drop Height

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

  • Page 13: Refrigerant Cycle Diagrams

    3. Refrigerant Cycle Diagram ACSH0920VM2-A, ACSH1220VM2-A...
  • Page 14 ACSH0924VM2-D, ACSH1222VM2-D Only for MOX230-12HFN1-BW0W, there is an Accumulator. ACSH1823VM2-D...
  • Page 15 ACSH2421VM2-D ACSH3618VM2-D Specifications 7  ...

  • Page 16: Electrical Wiring Diagrams

    Indoor and outdoor unit wiring diagram Outdoor Unit Indoor Unit ODU Model ODU Wiring Diagram IDU Model IDU Wiring Diagram ACSH0920VM2-A AIWH0900VM2-A ACSH1220VM2-A AIWH1200VM2-A 16022000035851 ACSH0924VM2-D AIWH0900VM2-D 16022000035853 ACSH1222VM2 AIWH1200VM2-D ACSH1823VM2-D AIWH1800VM2-D 16022000035849 AIWH2400VM2-D ACSH3618VM2-D AIWH3600VM2-D 16022000036331 Specifications 9 ...
  • Page 17 Outdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board ODU IPM Printed Circuit Board 17122000047115 ACSH0920VM2-A ACSH1220VM2-A ACSH0924VM2-D 17122000048121 ACSH1222VM2-D ACSH1823VM2-D 17122000048064 MOD32-24HFN1-MT0W 17122000047742 ACSH3618VM2-D...
  • Page 18 Indoor unit abbreviations Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LIVE NEUTRAL Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Outdoor unit abbreviations Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alternating Current FAN DC-FAN Direct Current FAN AC Current Detector...
  • Page 19 INDOOR WIRING DIAGRAM INDOOR FAN 16022000019694 OPTIONAL CN14 CN12_1 CN12_2 MI C RO SWI T CH HEATER CN6_1 PLASMA/UVC CN6_2 CN43 CN44 MAIN BOARD ROOM TEMPERATURE SENSOR BLUE(BLACK) L-IN YELLOW CN11 PI P E TEMPERATURE SENSOR CN10A (CN10) OPTIONAL CN16 1 2 3 Wi-Fi INDOOR UNIT...
  • Page 20 ::::l 0..::::l ;:::..· �. :::::!. ::::l I.Cl 0... N ot e s: • • • • • • • • 16022000020314 r u · I.Cl This s y mbol indicates the element IONIZER is optional , the actual sha p e shall ······················•.
  • Page 21 Indoor unit wirin g dia g ram: 16022000020953 • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ WIRING DIAGRAM •...

  • Page 22: Wiring Diagram

    Outdoor unit wiring diagram: 16022000035851 WIRING DIAGRAM INDOOR UNIT T3 T4 TP 1 _..__ I CN17 CN15 CN21 l CN -I N -I N EARTH T.M.P Sensor HEATER HEATER 4-WAY l ______ _!L ---------------- --1 CNlA MAIN BOARD ---- i ----- r ----- CNSO 1 ..---.
  • Page 23 Outdoor unit wiring diagram: 16022000035853 WIRING DIAGRAM INDOOR UNIT T3 T4 TP 1 ...._ ..... 1 CN17 CN15 CN21 ..CRANKCASE 4-WAY EARTH T.M.P Sensor HEATER HEATER I ______ _J ___ J CNlA MAIN BOARD CN50 I ------------------ CN31 I I �...
  • Page 24 WIRING DIAGRAM Outdoor Unit 16022000035849 --· CN16 CN19 NS CN 7 CN2 CN17 EARTH L-IN N-IN T.M.P Sensor 4-WAY HEATER .. I -------L -----------------1 MAIN BOARD r ---------------------- -, CN21 I-------------------- I -------------------- CN414 CN18 ACFAN DCFAN - ---, 1.----- The D box contains the ground wire of the compressor, This symbol indicates the element is optional, �...
  • Page 25 BLACK OPTIONAL BLUE COMP_TOP OPTIOna l CN3 2 CN2 9 CN3 0 CN2 6 CN4 2 CN1 6 BLACK BLUE CN2 0 OPTIONAL HE AT1 CN 8 BLACK CN2 1 WHITE OPTIONAL HE AT2 CN3 6 BLACK CN1 2 CN 11 CN2 7 BLUE WAY1...
  • Page 26 Outdoor unit printed circuit board diagram: 17122000044714, 17122000048121,17122000046453...
  • Page 28 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 29 Outdoor unit printed circuit board diagram: 17122000047115...
  • Page 30 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (100-130V AC input) L_in: connect to L-line (100-130V AC input) CN16 S: connect to indoor unit communication 4-WAY CN60 connect to 4 way valve, 100-130V AC when is ON. HEAT1 CN17 connect to compressor heater, 100-130V AC when is ON...
  • Page 31 Earth L-IN CN8 N-IN CN7 CN17 AC-FAN 4- WAY CN 60 HEAT2 R109 C515 CN 6 IC4 04 C408 R403 E502 CN4 14 DC-FAN CN1 9 R4 04 C 517 C5 19 CN 18 PMV R Y5 L2 01 IC401 E504 CN23 R8 02...
  • Page 32 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 33 Outdoor unit printed circuit board diagram: 17122000002671, 17122000048172...
  • Page 34 Name Meaning Current loop communication A, signal wire, connect to the terminal CN30 (24V DC Pulse wave) Current loop communication B, signal wire, connect to the terminal CN29 (24V DC Pulse wave) Current loop communication C, signal wire, connect to the terminal CN28 (24V DC Pulse wave) Current loop communication D, signal wire, connect to the terminal...
  • Page 35 Outdoor unit IPM board diagram: 17122000039428/17122000038756...
  • Page 36 Name Meaning OUT FAN (DC) CN19 Connect to DC motor CN3/CN4 Connect to compressor U CN5/CN6 Connect to compressor V CN7/CN8 Connect to compressor W CN54 CN54 Connect to main PCB CN6 CN51 CN51 Connect to PFC inductor CN53 CN53 Connect to main PCB CN5 CN52 CN52...
  • Page 37 Outdoor unit printed circuit board diagram: 17122000047742...
  • Page 38 Name Meaning CN11 N_in: connect to N-line (208-230V AC input) Power Supply CN12 L_in: connect to L-line (208-230V AC input) EEV-A CN16 EEV-B CN13 EEV-C EEV-D CN15 connect to electric expansion valve EEV-E EEV-F CN17 EEV-G CN14 connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust T3 T4 TP CN26 temp.
  • Page 39 Name Meaning HEAT_D CN20 connect to the heater, 208-230V AC when is ON CN21 HEAT_Y CN36 4-WAY CN38 connect to 4 way valve, 208-230V AC when is ON. CN27 connect to key board CN1 Note: This section is for reference only. Please take practicality as standard.

  • Page 40: 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 ....................

  • Page 41: 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 42: 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 43: Basic Functions

    A=2°C(3.6°F), Cases Compressor Case 2:T4 T4,15 min T3,10 min B=-2°C(-3.6°F) Frequency and T4 ACSH0920VM2-A ACSH1220VM2-A ACSH0924VM2-D ACSH1222VM2-D ACSH1823VM2-D MOD32-24HFN1-MT0W ACSH3618VM2-D Note: The detailed description of case 1 or case 2 is shown in the following function sections(from 3.4 to 3.6).

  • Page 44: Abbreviation

    Abbreviation auto. • 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) Actual fan speed...

  • Page 45: 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 46: 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 47: Refrigerant Leakage Detection

    3.11 Refrigerant Leakage Detection failure, will restore those setting automatically within 3 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 48: 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 49: Maintenance

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

  • Page 50: 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 51 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 52: Refrigerant Recharge

    2. Refrigerant Recharge (5[ZJUUX (-GY YOJK) :NXKK-]G_ )NKIQ O F F 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.

  • Page 53: Re-Installation

    3. Re-Installation Indoor Unit Collecting the refrigerant into the outdoor unit (5[ZJUUX (-GY :NXKK-]G_ 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 54 Air purging with vacuum pump (5[ZJUUX (-GY 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 55: Outdoor Unit

    Outdoor Unit Evacuation for the whole system (5[ZJUUX \GR\K 5VKT (-GY :NXKK-]G_ 5VKT 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 56 Refrigerant charging (5[ZJUUX (-GY YOJK) :NXKK-]G_ )NKIQ O F F 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 57 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 .................

  • Page 58: Dimension

    1. Dimension Capacity Body Code W(mm) D(mm) H(mm) 7K~9K 9K~12K 12K~18K 18K~24K 1080 27K~36K 1259 30K~36K 1350...

  • Page 59: 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 60 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 61 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. ...
  • Page 62 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.
  • Page 63 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 64 Procedure Illustration Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see CJ_ AB_012). CJ_AB_012 Remove 1 screw of the display board. (see CJ_AB_013). Rotate the display board in the direction shown in the right picture. CJ_AB_013 (see CJ_AB_013...

  • Page 65: 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 66 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 67 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. ...
  • Page 68 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 69: 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 70 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.

  • Page 71: 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 72 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.

  • Page 73: Step Motor

    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_AB_031). Stepping Motor CJ_AB_031 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 74: 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.

  • Page 75: Indoor Unit Disassembly(27K~36K)

    3. Indoor Unit Disassembly(27k~36k) Front Panel Procedure Illustration 1) Hold the front panel by the tabs on the both sides and lift it (see CJ_ AB(36)_001). CJ_AB(36)_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_ AB(36)_002).
  • Page 76 Procedure Illustration 3) Open the horizontal louver(below) and bend the louver lightly to loosn the leftmost hook, then push the hook towards right to loosn the sencond hook. (see CJ_AB(36)_003). 4) Remove the horizontal louver(below) towords left.(see CJ_AB(36)_003). CJ_AB(36)_003 5) Remove the horizontal louver(above) with the same way.(see CJ_ AB(36)_004).
  • Page 77 Procedure Illustration 6) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it. (see CJ_AB(36)_005). CJ_AB(36)_005 7) Pull out the connector wire, and then disconnect the connector for display board. (see CJ_AB(36)_006) . CJ_AB(36)_006 Note: This section is for reference only.
  • Page 78 Procedure Illustration 8) Slid the front panel side to side to release each axis (see CJ_AB(36)_007) CJ_AB(36)_007 9) Open the screw caps and then remove the 4 screws. (see CJ_AB(36)_008). 10) Remove the 4 screws fixing the panel frame.(see CJ_AB(36)_008). CJ_AB(36)_008 Note: This section is for reference only.
  • Page 79 Procedure Illustration Release the hooks with hands. (see CJ_AB(36)_009) CJ_AB(36)_009 Release the 5 hooks in the back (see CJ_AB(36)_010). CJ_AB(36)_010 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 23 ...
  • Page 80 Procedure Illustration Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger. (see CJ_AB(36)_011) CJ_AB(36)_011 Remove 1 screw of the display board. (see CJ_AB(36)_012). CJ_AB(36)_012 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 81 Procedure Illustration Rotate the display board in the direction shown in the right picture. CJ_AB(36)_013 (see CJ_AB(36)_013 Remove 1 screw of the wifi module . (see CJ_AB(36)_014). CJ_AB(36)_014 Rotate the wifi module in the direction shown in the right picture. (see CJ_AB(36)_015) CJ_AB(36)_015 Note: This section is for reference only.

  • Page 82: Electrical Parts

    3.2 Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration 1) Remove 2 fixing screws of electrical control box subassembly. (see CJ_ AB(36)_016). CJ_AB(36)_016 2) Disconnect the connectors.(see CJ_ AB(36)_017).
  • Page 83 Procedure Illustration 3) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB(36)_018). 4) Remove one fixing screw of the electronic control box and two screws used for the ground connection (see CJ_AB(36)_018). 5) Remove fixed clamp of temperature sensor (see CJ_AB(36)_018).
  • Page 84 Procedure Illustration 6) Pull out the electrical main board along the direction indicated in right image. (see CJ_AB(36)_019). CJ_AB(36)_019 7) Disconnect the connectors and remove main control board. (see CJ_ AB(36)_020). CJ_AB(36)_020...

  • Page 85: Evaporator

    3.3 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(36)_021). CJ_AB(36)_021 2) Remove the 3 screws on the evaporator located at the fixed plate (see CJ_ AB(36)_022).
  • Page 86 Procedure Illustration 3) Remote the 4 screws fixing the fan motor cover (see CJ_AB(36)_023). CJ_AB(36)_023 4) Pull out the evaporator (see CJ_ AB(36)_024). CJ_AB(36)_024...

  • Page 87: Fan Motor And Fan

    3.4 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 bearing sleeve (see CJ_ AB(36)_025).

  • Page 88: Step Motor

    3.5 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 3 screws, then remove the horizontal swing motor(above)(see CJ_ AB(36)_027). CJ_AB(36)_027 2) Remove the 2 screws, then remove the horizontal swing motor(below)(see CJ_ AB(36)_028) 3) Remove 1 screw, then remove the ionizer...
  • Page 89 Procedure Illustration 4) Remove 1 screw, then remove the Positive and negative ion generator. (see CJ_ AB(36)_029).(for some units)’ CJ_AB(36)_029 5) Remove 2 screws, then remove the vertical swing motor (see CJ_AB(36)_030).(for some units) CJ_AB(36)_030 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 90: Drain Hose

    2.6 Drain Hose Procedure Illustration 1) Pull up the drain hose to remove it (see CJ_AB(36)_031). CJ_AB(36)_031...
  • Page 91 Outdoor Unit Disassembly Contents Outdoor Unit Table ............... 2 Dimension ................... 3 Outdoor Unit Disassembly ............. 16 Panel Plate ................. 16 Electrical Parts ..............29 Fan Assembly ............... 44 Fan Motor ................45 Sound blanket ..............46 Four-way valve ..............47 Compressor .................

  • Page 92: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board ACSH0920VM2-A X230 PCB Board 8 ACSH1220VM2-A X230 PCB Board 8 ACSH0924VM2-D X230 PCB Board 6 ACSH1222VM2-D X230 PCB Board 6 ACSH1823VM2-D X430 PCB Board 3 ACSH3618VM2-D PCB Board 9...

  • Page 93: Dimension

    2. Dimension 2.1. X130 Panel Plate  Outdoor Unit Disassembly 3 ...
  • Page 94 For US models(Rounded grille):...
  • Page 95 2.2. X230 Panel Plate  Outdoor Unit Disassembly 5 ...
  • Page 96 For US models(Rounded grille):...
  • Page 97 For US models(Square grille): 30.87(784) 11.9{303) 17.8(452) ---------- SCALE  Outdoor Unit Disassembly 7 ...
  • Page 98 2.3. X330 Panel Plate...
  • Page 99 For US models(Rounded grille):  Outdoor Unit Disassembly 9 ...
  • Page 100 For US models(Square grille): 32.1 [815] 21.8 [554] 34.4 [874] 4.1 (105] 12.1 [307] 13.6 [346] 2.4(60] (95]...
  • Page 101 2.4. X430 Panel Plate --------------------------- f1,_  Outdoor Unit Disassembly 11 ...
  • Page 102 For US models(Rounded grille):...
  • Page 103 For US models(Square grille):  Outdoor Unit Disassembly 13 ...
  • Page 104 2.5. Panel Plate...
  • Page 105 For US models:  Outdoor Unit Disassembly 15 ...

  • Page 106: Panel Plate

    3. Outdoor Unit Disassembly Panel Plate 1. D30 Procedure Illustration 1) Turn off the air conditioner and the Big Handle power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_D30_001). CJ_D30_001 Top Cover 3) Remove the screws of the top cover...
  • Page 107 Procedure Illustration 4) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_D30_003). Front Right Panel CJ_D30_003 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see CJ_D30_004).
  • Page 108 Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water collecting cover (2 screw) (see CJ_ D30_005). Water Collecting Cover CJ_D30_005 7) Remove the screws of the rear net and then remove the rear net (2 screws) CJ_D30_006).
  • Page 109 Procedure Illustration 8) Remove the screws of the right panel and then remove the right panel (8 screws) (see CJ_D30_007). Right Panel CJ_D30_007 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 19 ...
  • Page 110 2. 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 and then remove the top cover (3 screws).
  • Page 111 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 112 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.
  • Page 113 3. 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 114 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 115 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 25 ...
  • Page 116 4. 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 117 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 118 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.

  • Page 119: 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. 1. PCB board 1 Procedure Illustration 1) Remove the screws of the top cover. CJ_ODU_PCB_001- (2 screws) (see CJ_ODU_PCB_001-1...
  • Page 120 2. PCB board 2 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_002-1 (see 4-Way Valve 2) Disconnect the connector for fan CJ_ODU_PCB_002-1 motor from the electronic control CJ_ODU_PCB_002-2 board (see 3) Remove the connector for the Reactor CJ_ODU_PCB_002- compressor (see...
  • Page 121 3. PCB board 3 Procedure Illustration 1) Remove the 5 screws and unfix two hooks, then remove the electronic control box subassembly.(see ODU_PCB_003-1 Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured. CJ_ODU_PCB_003-1 Note: This section is for reference only.
  • Page 122 4. PCB board 4 Procedure Illustration 1) Remove the screws of the top cover. CJ_ODU_PCB_004- (1 screws) (see CJ_ODU_PCB_004-1 2) Unfix the hooks and then open the electronic control box cover (5 hooks) CJ_ODU_PCB_004-2 (see CJ_ODU_PCB_004-2 3) Disconnect the connector for fan motor from the IPM board (see ODU_PCB_004-3 Compressor...
  • Page 123 Procedure Illustration 5) Pull out the wire connected with the CJ_ODU_PCB_004-4 terminal. (see T3/T4 6) Pull out connectors of the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. CJ_ODU_PCB_004-4 sensor(TP) (see 7) Disconnect the electronic expansion CJ_ODU_PCB_004- valve wire (see Fig 4-Way Valve 8) Remove the connector for 4-way valve.
  • Page 124 5. PCB board 5 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_005-1 (see 2) Disconnect the connector for outdoor DC fan from the electronic CJ_ODU_ control board (see PCB_005-2 3) Remove the connector for the CJ_ODU_PCB_005- compressor (see CJ_ODU_PCB_005-1...
  • Page 125 6. PCB board 6 Procedure Illustration 1) Disconnect the connector for compressor and release the ground wire(1 screw,for some models ). (see CJ_ODU_PCB_006-1 CJ_ODU_PCB_006-1 2) Remove the electronic control CJ_ODU_ box subassembly. (see PCB_006-2 Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 126 7. PCB board 7 Procedure Illustration 1) Unfix the hooks and then open CJ_ODU_ the cover (4 hooks)(see PCB_007-1 CJ_ODU_PCB_007-1 2) Remove 4 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_007-2 (see Note:Electronic installing box cannot be opened, so the voltage between P and N cannot be measured.
  • Page 127 Procedure Illustration 3) Remove two screws and then remove the electronic control box subassembly on partition board CJ_ODU_PCB_007- assembly. (see CJ_ODU_PCB_007-3 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 128 Procedure Illustration 6) Remove two screws and two connectors and then remove the CJ_ODU_ inverter control board (see PCB_007-4 CJ_ODU_PCB_007-4 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 39 ...
  • Page 129 8. PCB board 8 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_ wire(1 screw). (see PCB_0011-1 2) Remove the electronic control CJ_ODU_ box subassembly. (see CJ_ODU_PCB_008-1 PCB_008-2 Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 130 9. PCB board 9 Procedure Illustration 1) Unfix the hooks and then open CJ_ODU_ the cover (4 hooks)(see PCB_009-1 CJ_ODU_PCB_009-1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_009-2 (see Note:Electronic installing box cannot be opened, so the voltage between P and N cannot be measured.
  • Page 131 Procedure Illustration 3) Pull out the connector, remove one screw and then remove the key board subassembly on terminal CJ_ODU_PCB_009-3 board. (see (for some models). CJ_ODU_PCB_009-3 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 132 PCB board 10 Procedure Illustration 1) Disconnect the connector for CJ_ODU_PCB_010- compressor. (see 2) Remove the screws of cover of electronic control box(5 screws). (see CJ_ODU_PCB_010-1 3) Turn over the electronic control box subassembly CJ_ODU_PCB_010-1 4) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_010-2 5) Then remove the electronic control...
  • Page 133 11. PCB board 11 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_ wire(1 screw). (see PCB_011-1 CJ_ODU_PCB_011-1 2) Remove the electronic control CJ_ODU_ box subassembly. (see PCB_011-2 Note: Electric control box cover cannot be removed, so the voltage between cannot measured.

  • Page 134: 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. CJ_ODU_FAN_001 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 135: 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 136: 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) (Applicable to models with blanket) Sound Blanket(side) (Applicable to models with blanket) CJ_ODU_BLANKET_001 Note: This section is for reference only.

  • Page 137: 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 138: 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 139 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 140: Troubleshooting

    Troubleshooting Contents Safety Caution ......................3 General Troubleshooting ..................4 Complain Record Form .................... 7 Information Inquiry ....................9 Error Diagnosis and Troubleshooting Without Error Code ........ 12 Remote maintenance ......................12 Field maintenance ....................... 13 Quick Maintenance by Error Code ............... 18 Troubleshooting by Error Code................
  • Page 141 Contents F0/PC 08 (Current overload protection diagnosis and solution) ......29 P0/PC 00 (IPM malfunction or IGBT over-strong current protection diagnosis and solution) ..........................30 7.10 P1/PC 01 (Over voltage or too low voltage protection diagnosis and solution)31 7.11 P2/PC 02 (High temperature protection of IPM module or High pressure protection diagnosis and solution) ................

  • Page 142: 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 143: 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 144 For some models Operation Timer Error Information Solution Lamp Lamp Display EH 00/EH 1 time Indoor unit EEPROM parameter error TS19 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 145 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 146: Complain Record Form

    3. Complain Record Form Complain Record Form Request No.: Date: Installation Date: Service Date: Customer Information Name Telephone No. Home Address Email Product Information Indoor Unit Model Outdoor Unit Model Serial No. of indoor unit Serial No. of outdoor unit □Cooling □Heating □Fan only...
  • Page 147 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 Outlet temperature of indoor coil Discharge temperature Sunction temperature Targeted Frequency Actual Frequency Indoor fan speed Outdoor fan speed EXV opening steps Compressor continuous...

  • Page 148: Information Inquiry

    4. 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 149 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 150 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25  Troubleshooting 11 ...

  • Page 151: Error Diagnosis And Troubleshooting Without Error Code

    5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start TS14 - TS15...

  • Page 152: 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 154 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 ☆...
  • Page 155 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 ☆...
  • Page 156 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 157: Quick Maintenance By Error Code

    6. Quick Maintenance by Error Code If you do not have the time to test which specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring E7/Eb...

  • Page 158: Troubleshooting By Error Code

    7. Troubleshooting by Error Code E0/EH 00/EH 0A / 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: Is it still displaying the error code?

  • Page 159: 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: Correct the connection change wires Repalce indoor PCB For units with W wir...
  • Page 160 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 161: 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: Correct the connections.

  • Page 162: 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 163 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 164 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 165: 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 166: 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: Does the error still exist? ...

  • Page 167: 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 168: F0/Pc 08 (Current Overload Protection Diagnosis And Solution)

    F0/PC 08 (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 Restart the unit when the power supply Is the power voltage is normal?

  • Page 169: 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 170: P1/Pc 01 (Over Voltage Or Too Low Voltage Protection Diagnosis And Solution)31

    7.10 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 171: P2/Pc 02(High Temperature Protection Of Ipm Module Or High Pressure Protection Diagnosis And Solution)

    7.11 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 172 High pressure protection Is the high pressure protector broken? “F ”m  Troubleshooting 33 ...

  • Page 173: P4/Pc 04(Inverter Compressor Drive Error Diagnosis And Solution)

    7.12 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 174: P6/Pc 03(High Pressure Protection Or Low Pressure Protection Diagnosis And Solution)

    7.13 P6/PC 03(High pressure protection or Low pressure protection 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 175 High pressure protection Is the high pressure protector broken? “F ”m...
  • Page 176 Low pressure protection Are the low pressure protector Reconnect the low pressure protector and main control board Is the low pressure protector broken? Method: Disconnect the plug. Measure the resistance of the Replace low pressure protector low pressure protector. If the protector is normal the value is Note: For certain models, outdoor PCB could not be removed separately.

  • Page 177: Check Procedures

    8. Check Procedures 8.1 Temperature Sensor Check 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 178 Resistance Value ASM135D23UFZ ATQ420D1UMU ASN98D22UFZ ATF235D22UMT ATQ360D1UMU Blue-Red Blue-Black 1.75Ω 0.37Ω Ω 0.75Ω 0.37Ω 1.57 Red-Black Resistance Value ATM115D43UFZ2 ATF250D22UMT ATF310D43UMT KSK103D33UEZ3(YJ) ASM98D32UFZ Blue-Red Blue-Black 1.87Ω 0.75Ω 0.65Ω 2.13Ω 2.2Ω Red-Black Resistance Value ASN140D21UFZ ASK89D29UEZD KSN140D21UFZ KTM240D57UMT KSK103D33UEZ3 Blue-Red Blue-Black 1.28Ω...

  • Page 179: Ipm Continuity Check

    Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.3 IPM Continuity Check Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1.
  • Page 180 Note: The picture and the value are only for reference, actual condition and specific value may vary.  Troubleshooting ...
  • Page 181 8.4 Indoor AC Fan Motor Check 1) Power off and disconnect fan motor power cord from PCB. Measure the resistance value of each winding by using the multi-meter. The normal value show as follows . YKFG-13-4-38L Model YKFG-15-4-28-1 YKFG-20-4-10L YKFG-20-4-5-11 YKFG-13-4-38L-4 Brand Welling...
  • Page 182 8.5 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. If the value of the voltage is not in the range, the PCB must have problems and need to be replaced. Red Brown Blue 2 Turn off the power, use a digital tester to measure the resistance.

  • Page 183: Exv Check

    8.6 EXV Check 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 184 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 185 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 186 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 187: Pressure On Service Port

    iii) Pressure On Service Port Cooling chart(R410A): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.1 10.6 75/63 (23.89/17.22) 10.7 11.2 80/67 (26.67/19.44) 11.2 11.9 90/73 (32.22/22.78) 10.5 10.3 10.0 10.6 12.4 13.0 70/59 (21.11/15) 75/63 (23.89/17.22)
  • Page 188 Heating chart(R410A): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 65(18.33) 32.5 30.0 26.6 25.4 23.3 20.5 19.0 75(23.89) 33.8 31.5 27.8 26.3 24.9 21.5...
  • Page 189 Cooling chart(R22): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 0.40 0.41 0.46 0.50 0.51 0.49 0.51 0.54 0.63...
  • Page 190 Heating chart(R22): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 18.9 17.8 15.8 14.3 13.0 11.6 10.3 65(18.33) 20.3 18.8 16.6 15.9 14.6 12.8 11.9 75(23.89) 21.1 19.7 17.3 16.4 15.6 13.4...
  • Page 191 Cooling chart(R32): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.3 10.8 75/63 (23.89/17.22) 10.9 11.4 80/67 (26.67/19.44) 11.4 12.1 90/73 (32.22/22.78) 10.7 10.5 10.2 10.8 12.6 13.3 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15)
  • Page 192 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 193 System Pressure Table-R22 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -41.091 -41.964 1600 41.748 107.146 21.75 -32.077 -25.739 1650 16.5 239.25 43.029 109.452 -25.177 -13.319 1700 246.5 44.281 111.706 36.25 -19.508 -3.114 1750 17.5 253.75 45.506 113.911 43.5 -14.654 5.623 1800...
  • Page 194 System Pressure Table-R410A Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.623 -60.921 2350 23.5 340.75 38.817 101.871 21.75 -43.327 -45.989 2400 39.68 103.424 -36.992 -34.586 2450 24.5 355.25 40.531 104.956 36.25 -31.795 -25.231 2500 362.5 41.368 106.462 43.5 -27.351 -17.232 2550...
  • Page 195 System Pressure Table-R32 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.909 -61.436 1850 18.5 268.25 28.425 83.165 21.75 -43.635 -46.543 1900 275.5 29.447 85.005 -37.323 -35.181 1950 19.5 282.75 30.448 86.806 36.25 -32.15 -25.87 2000 31.431 88.576 43.5 -27.731 -17.916 2050...

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