ACIQ -18-EHPB Service Manual
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ACIQ -18-EHPB Service Manual

Central inverter systems ehpb, hpb, & hpc condenser
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CENTRAL INVERTER SYSTEMS EHPB, HPB, & HPC CONDENSER
SERVICE MANUAL
Models Covered:
ACiQ-18-EHPB / ACiQ-18-HPB
ACiQ-24-EHPB / ACiQ-24-HPB
ACiQ-30-EHPB / ACiQ-30-HPB
ACiQ-36-EHPB / ACiQ-36-HPB / ACiQ-36-HPC
ACiQ-48-EHPB / ACiQ-48-HPB
ACiQ-60-EHPB / ACiQ-60-HPB
VERSION DATE: 06-17-24

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Summary of Contents for ACIQ ACiQ-18-EHPB

  • Page 1 CENTRAL INVERTER SYSTEMS EHPB, HPB, & HPC CONDENSER SERVICE MANUAL Models Covered: ACiQ-18-EHPB / ACiQ-18-HPB ACiQ-24-EHPB / ACiQ-24-HPB ACiQ-30-EHPB / ACiQ-30-HPB ACiQ-36-EHPB / ACiQ-36-HPB / ACiQ-36-HPC ACiQ-48-EHPB / ACiQ-48-HPB ACiQ-60-EHPB / ACiQ-60-HPB VERSION DATE: 06-17-24...
  • Page 3 Table of Contents §. Safety Precautions Precautions Information servicing §. Model Reference & External Appearance Model Reference External Appearance §. Outdoor Unit Dimensional Drawings Service Space Capacity Correction Factor for Height Difference Noise Criterion Curves Refrigerant Cycle Diagrams Electrical Wiring Diagrams §.

  • Page 5: Safety Precautions

    Safety Precautions Contents Precautions ......................2 Information servicing(For flammable 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: Work Procedure

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

  • Page 8: Detection Of Flammable Refrigerants

    • that capacitors are discharged: this shall be done in a shall also take into account the effects of aging or 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 the 2.13 Detection of flammable refrigerants 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 are unaware of the procedure taking place possible, cooled before recovery occurs. • The hose must be of sufficient length and diameter • The recovery equipment shall be in good working such that it will extend to at least 3 m beyond the order with a set of instructions concerning the outside of the building equipment that is at hand and shall be suitable for the...

  • Page 11: Model Reference

    Model Reference Contents Model Reference ....................2 External Appearance .....................3...
  • Page 12 1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. Outdoor Unit Model Capacity (Btu/h) Power Supply ACIQ-18-EHPB ACIQ-18-HPB ACIQ-24-HPB ACIQ-24-EHPB ACIQ-30-EHPB ACIQ-30-HPB 1Ph, 208/230V~, 60Hz ACIQ-36-EHPB ACIQ-36-HPC...

  • Page 13: External Appearance

    2. External Appearance Single Fan Outdoor Unit Double Fan Outdoor Unit  Model Reference ...

  • Page 14: Table Of Contents

    Outdoor Unit Contents Dimensional Drawings ..................2 Service Place ......................19 Capacity Correction Factor for Height Difference ..........20 Noise Criterion Curves ..................25 Refrigerant Cycle Diagrams ................29 Electrical Wiring Diagrams ..................35...

  • Page 15: Dimensional Drawings

    1. Dimensional Drawings Please check the corresponding dimensional drawing according to the panel plate. Outdoor Unit Model Panel Plate ACIQ-18-EHPB X330 ACIQ-18-HPB X430 ACIQ-24-HPB ACIQ-24-EHPB X430 ACIQ-30-EHPB ACIQ-30-HPB ACIQ-36-EHPB ACIQ-36-HPC X630 ACIQ-36-HPB ACIQ-48-HPB ACIQ-48-EHPB ACIQ-60-EHPB ACIQ-60-HPB  Outdoor Unit 2...
  • Page 16 Panel Plate X230 (Rounded grille 1)  Outdoor Unit 3 ...
  • Page 17 Panel Plate X230 (Rounded grille 2)  Outdoor Unit 4 ...
  • Page 18 Panel Plate X230(Square grille)  Outdoor Unit 5 ...
  • Page 19 X330(Rounded grille 1) Panel Plate  Outdoor Unit 6 ...
  • Page 20 X330(Rounded grille 2) Panel Plate  Outdoor Unit 7 ...
  • Page 21 X330(Square grille) Panel Plate  Outdoor Unit 8 ...
  • Page 22 X430(Rounded grille 1) Panel Plate  Outdoor Unit 9 ...
  • Page 23 X430(Rounded grille 2) Panel Plate  Outdoor Unit 10 ...
  • Page 24 X430(Square grille) Panel Plate  Outdoor Unit 11 ...
  • Page 25 Panel Plate D30(Rounded grille 1)  Outdoor Unit 12 ...
  • Page 26 Panel Plate D30(Rounded grille 2)  Outdoor Unit 13 ...
  • Page 27 Panel Plate D30(Square grille)  Outdoor Unit 14 ...
  • Page 28 Panel Plate X630(Square grille)  Outdoor Unit 15 ...
  • Page 29 Panel Plate E30(Square grille)  Outdoor Unit 16 ...
  • Page 30 Panel Plate E30(Rounded grille 1)  Outdoor Unit 17 ...
  • Page 31 Panel Plate E30(Rounded grille 2)  Outdoor Unit 18 ...

  • Page 32: Service Place

    2. Service Place  Outdoor Unit 19 ...

  • Page 33: Capacity Correction Factor For Height Difference

    3. Capacity Correction Factor for Height Difference Capacity(Btu/h) 6k~9k Pipe Length (m/ft) Cooling 7.5/24.6 10/32.8 20/65.6 25/82 10/32.8 0.969 0.936 0.920 Indoor Upper than Outdoor 5/16.4 0.995 0.979 0.946 0.929 Height difference 1.000 0.984 0.951 0.934 H (m) -5/-16.4 1.000 0.984 0.951 0.934...
  • Page 34 Capacity(Btu/h) Pipe Length (m/ft) Heating 7.5/24.6 10/32.8 20/65.6 30/98.4 20/65.6 0.987 0.978 Indoor Upper 10/32.8 0.996 0.987 0.978 than Outdoor 5/16.4 1.000 0.996 0.987 0.978 Height difference 1.000 0.996 0.987 0.978 H (m) -5/-16.4 0.992 0.988 0.979 0.970 Outdoor Upper -10/-32.8 0.980 0.971...
  • Page 35 Capacity Pipe Length (m/ft) (Btu/h) Cooling 7.5/24.6 10/32.8 20/65.6 30/98.4 40/131.2 50/164 25/82 0.891 0.862 0.832 20/65.6 0.930 0.900 0.871 0.841 Indoor Upper than Outdoor 10/32.8 0.970 0.940 0.910 0.879 0.849 Height 5/16.4 0.995 0.980 0.949 0.919 0.888 0.858 difference 1.000 0.985 0.954...
  • Page 36 Capacity Pipe Length (m/ft) (Btu/h) Cooling 7.5/24.6 15/49.2 25/82 35/114.8 50/164 65/213.3 30/98.4 0.889 0.850 0.812 20/65.6 0.924 0.898 0.859 0.820 Indoor Upper than Outdoor 10/32.8 0.959 0.933 0.907 0.868 0.828 5/16.4 0.995 0.969 0.942 0.916 0.876 0.837 Height difference 1.000 0.974 0.947...
  • Page 37 Capacity Pipe Length (m/ft) (Btu/h) Cooling 7.5/24.6 15/49.2 25/82 35/114.8 50/164 65/213.3 30/98.4 0.884 0.843 0.802 20/65.6 0.920 0.893 0.852 0.810 Indoor Upper than Outdoor 10/32.8 0.957 0.930 0.902 0.860 0.819 5/16.4 0.995 0.967 0.939 0.911 0.869 0.827 Height difference 1.000 0.972 0.944...
  • Page 38 Capacity Pipe Length (m/ft) (Btu/h) Cooling 7.5/24.6 15/49.2 25/82 35/114.8 50/164 65/213.3 30/98.4 0.870 0.823 0.775 20/65.6 0.911 0.879 0.831 0.783 Indoor Upper than Outdoor 10/32.8 0.953 0.920 0.888 0.840 0.791 5/16.4 0.995 0.962 0.930 0.897 0.848 0.799 Height difference 1.000 0.967 0.934...

  • Page 39: Noise Criterion Curves

    -Reference acoustic pressure OdB=20µPa -Sound level will vary depending on arrange off actors such as the construction (acoustic absorption coefficient) of particular room in which the equipment is installed. -The operating conditions are assumed to be standard. ACIQ-18-EHPB ACIQ-24-EHPB  Outdoor Unit 25...
  • Page 40 ACIQ-30-EHPB ACIQ-36-EHPB ACIQ-48-EHPB ACIQ-60-EHPB  Outdoor Unit 26 ...
  • Page 41 ACIQ-18-HPB ACIQ-24-HPB ACIQ-30-HPB ACIQ-36-HPB  Outdoor Unit 27 ...
  • Page 42 ACIQ-48-HPB ACIQ-60-HPB ACIQ-36-HPC  Outdoor Unit 28 ...

  • Page 43: Refrigerant Cycle Diagrams

    5. Refrigerant Cycle Diagrams Pipe Size (Diameter:ø) Piping length (m/ft) Elevation (m/ft) mm(inch) Model No. Additional Refrigerant Liquid Rated Max. Rated Max. ACIQ-18-EHPB 19(3/4) 9.52(3/8) 7.5/24.6 30/98.4 20/65.6 65g/m (0.69oz/ft)  Outdoor Unit 29 ...
  • Page 44 Pipe Size (Diameter:ø) Piping length (m/ft) Elevation (m/ft) mm(inch) Model No. Additional Refrigerant Liquid Rated Max. Rated Max. ACIQ-24-HPB 19(3/4) 9.52(3/8) 7.5/24.6 50/164 25/82 65g/m (0.69oz/ft) ACIQ-30-EHPB 19(3/4) 9.52(3/8) 7.5/24.6 50/164 25/82  Outdoor Unit 30 ...
  • Page 45 Pipe Size (Diameter:ø) Piping length (m/ft) Elevation (m/ft) mm(inch) Model No. Additional Refrigerant Liquid Rated Max. Rated Max. ACIQ-18-HPB 19(3/4) 9.52(3/8) 7.5/24.6 30/98.4 20/65.6 ACIQ-24-EHPB 19(3/4) 9.52(3/8) 7.5/24.6 50/164 25/82 ACIQ-30-HPB 19(3/4) 9.52(3/8) 7.5/24.6 50/164 25/82 65g/m (0.69oz/ft) ACIQ-36-EHPB 19(3/4) 9.52(3/8)
  • Page 46 Pipe Size (Diameter:ø) Piping length (m/ft) Elevation (m/ft) mm(inch) Model No. Additional Refrigerant Liquid Rated Max. Rated Max. ACIQ-36-HPC 19(3/4) 9.52(3/8) 7.5/24.6 65/213 30/98.4 65g/m (0.69oz/ft)  Outdoor Unit 32 ...
  • Page 47 Pipe Size (Diameter:ø) Piping length (m/ft) Elevation (m/ft) mm(inch) Model No. Additional Refrigerant Liquid Rated Max. Rated Max. ACIQ-36-HPB 19(3/4) 9.52(3/8) 7.5/24.6 65/213 30/98.4 65g/m (0.69oz/ft) ACIQ-48-HPB 19(3/4) 9.52(3/8) 7.5/24.6 65/213 30/98.4  Outdoor Unit 33 ...
  • Page 48 Pipe Size (Diameter:ø) Piping length (m/ft) Elevation (m/ft) mm(inch) Model No. Additional Refrigerant Liquid Rated Max. Rated Max. ACIQ-60-HPB 22(7/8) 9.52(3/8) 7.5/24.6 65/213 30/98.4 65g/m (0.69oz/ft)  Outdoor Unit 34 ...

  • Page 49: Electrical Wiring Diagrams

    6. Electrical Wiring Diagrams ODU Model ODU Wiring Diagram ACIQ-18-EHPB 16022000036289 ACIQ-18-HPB 16022000036171 ACIQ-24-EHPB ACIQ-24-HPB ACIQ-30-HPB 16022000036170 ACIQ-30-EHPB ACIQ-36-EHPB ACIQ-36-HPC 16022000040551 ACIQ-36-HPB ACIQ-48-HPB 16022000036969 ACIQ-60-HPB ACIQ-48-EHPB 16022000036169 ACIQ-60-EHPB  Outdoor Unit 35 ...
  • Page 50 ODU Main Printed Circuit Inverter Module ODU Model 24V Printed Board Board Printed Board ACIQ-18-EHPB 17122000046453 17122000054047 ACIQ-18-HPB 17122000048064 17122000054047 ACIQ-24-EHPB ACIQ-24-HPB ACIQ-30-HPB 17122000047742 17122000054047 ACIQ-30-EHPB ACIQ-36-EHPB ACIQ-36-HPC 17122300007152 17122000054047 ACIQ-36-HPB ACIQ-48-HPB ACIQ-48-EHPB 17122000037804 17122000042012 17122000054047 ACIQ-60-HPB ACIQ-60-EHPB  Outdoor Unit 36...
  • Page 57 Outdoor unit printed circuit board diagram: 17122000044714, 17122000048121,17122000046453...
  • Page 58 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 59 Outdoor unit printed circuit board diagram: 17122000048064& 17122000048066 RC 2 VU B...
  • Page 60 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 61 Outdoor unit printed circuit board diagram: 17122000047742...
  • Page 62 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 63 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 64 Outdoor unit printed circuit board diagram: 17122000037804...
  • Page 65 Name Meaning L1_in: connect to L1-line (230V AC input) Power Supply L2_in: connect to L2-line (230V AC input) Exhaust temp. sensor TP TESTPORT CN35 used for testing HEAT1 CN19/CN20 connect to chassis heater, 208-230V AC when is ON HEAT2 CN24/CN25 connect to compressor heater, 208-230V AC when is ON 4-WAY CN17/CN18...
  • Page 66 Outdoor unit IPM board diagram: 17122000042012...
  • Page 67 Name Meaning connect to main board L-Out Power Supply connect to main board N-Out connect to main board CN6 FAN_DC FAN_1/FAN_2 connect to outdoor DC fan 1& DC fan 2 CN_COMP connect to compressor Note: This section is for reference only. Please take practicality as standard.
  • Page 68 Outdoor unit printed circuit board diagram: 17122300007152...
  • Page 69 Name Meaning COMPRESSOR connect to compressor; 0V AC (standby); 10-310V AC (running) DC-FAN CN32 connect to DC fan TESTPORT CN45 used for testing HEAT_Y CN38 connect to compressor heater, 208-230V AC when is ON CN37 connect to 4 way valve 1, 208-230V AC when is ON. 4-WAY CN25 connect to 4 way valve 2, 208-230V AC when is ON.
  • Page 70 Name Meaning EEVA CN17 EEVB CN16 EEVC CN22 EEVD CN14 EEVE CN13 connect to electric expansion valve EEVF EEV1 CN53 EEV2 CN44 EEV3 H_YL CN49 connect to high pressure sensor Note: This section is for reference only. Please take practicality as standard.
  • Page 71 Outdoor unit printed circuit board diagram: 17122000054047...
  • Page 72 Name Meaning connect to one-way solenoid valve connect to pressure sensor (5VDC) CN28 connect to electric expansion valve (12VDC) TESTPORT CN45 used for testing (5VDC) connect to suction temp. sensor, cold plate temp. sensor CN11 (5VDC) H-PRO CN38 connect to high pressure switch (5VDC) connect to main board L-Out Power Supply connect to main board N-Out...

  • Page 73: Installation

    Installation Contents Accessories Location Selection Outdoor Unit Installation Refrigerant Pipe Installation Vacuum Drying and Leakage Checking Additional Refrigerant Charge Engineering of Insulation Engineering of Electrical Wiring Test Operation...

  • Page 74: Location Selection

    1. Accessories 25 cm / 9.8” or Name Shape Quantity L ≤ 1/2H more L ≤ H Drain joint 30 cm / 11.8” or 1/2H < L ≤ H more L > H Can not be installed Seal Transfer connector 2.
  • Page 75 2.7 If the unit is frequently exposed to salty air (seaside): Use outdoor unit that is specially designed to resist corrosion.  2. Location selection ...

  • Page 76: Outdoor Unit Installation

    3. Outdoor unit installation 2. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating 3.1 Service space for outdoor unit mode. 3.3 Bolt pitch Panel Plate Unit 3.2 Install drain joint(Heat pump unit only) inch 11.93 17.80...
  • Page 77 3.4 Install Outdoor Unit Fix the outdoor unit with anchor bolts(M10) >60cm / 23.6” Fix with bolts Caution Since the gravity center of the unit is not at its physical center, so please be careful when lifting it with a sling. Never hold the inlet of the outdoor unit to prevent it from deforming.
  • Page 78  ...
  • Page 79  ...

  • Page 80: Refrigerant Pipe Installation

    2.Confirm the cross way of the pipes. 4. Refrigerant Pipe Installation 3.Measure the necessary pipe length. 4.1 Maximum length and drop height 4.Cut the selected pipe with pipe cutter Ensure that the length of the refrigerant pipe, the number • Make the section flat and smooth.

  • Page 81: Vacuum Drying And Leakage Checking

    5. Vacuum Drying and Leakage 10. Set the wall conduit Checking 11. Set the supporter for the pipe. 12. Locate the pipe and fix it by supporter 5.1 Purpose of vacuum drying • For horizontal refrigerant pipe, the distance be- •...

  • Page 82: Additional Refrigerant Charge

    4. Rain water might penetrate into pipeline during 6. Additional Refrigerant Charge construction. • After the vacuum drying process is carried out, the additional refrigerant charge process need to be performed. Procedures of special vacuum drying are as follows: • The outdoor unit is factory charged with refrigerant.

  • Page 83: Engineering Of Insulation

    7 . Engineering of Insulation insulation and cause easy aging of the material. 7.2 Insulation of drainage pipe 7.1 Insulation of refrigerant pipe 1. Operational procedure of refrigerant pipe 1. Operational procedure of refrigerant pipe insulation insulation Select the suitable pipe → insulation (except joint section) Cut the suitable pipe →...
  • Page 84 2. Specific wiring method Engineering of Electrical Wring Connection method A: 1. Highlights of electrical wiring installation Refer to the wiring method of internal and external • All field wiring construction should be finished by machine communication and wired controller as follows: qualified electrician.

  • Page 85: Control Logic

    • Wiring for 3H and 1C thermostat • Wiring for 2H and 1C thermostat S4-1 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages. S4-2 Default on ， DH function off. S4-1 Default on, W1 and W2 Turn switch off to activate DH shorted for single stage Aux heat function.

  • Page 86: Outdoor Unit Dip Switch Setting

    4. Outdoor unit DIP Switch setting Dial Function code S1-1 Function to be defined 24V communication 485 communication S1-2 Communication dial code scheme scheme The cooling/heating target The cooling/heating target S1-3 Strong cold and strong heat function pressure compensation pressure compensation value is valid value is invalid Default setting(standard...

  • Page 87: Test Operation

    b. Turn on the main power switch and run the air 9. Test Operation conditioner in COOL mode. 1. The test operation must be carried c. Check to see that the water is discharged. It may out after the entire installation has been take up to one minute before the unit begins to drain completed.

  • Page 88: Troubleshooting

    Troubleshooting Contents 1. Safety Caution ..................... 3 2. General Troubleshooting ................4 Error Display (For Some Outdoor Unit) ............... 4 3. Outdoor Unit Point Check Function ............5 4. Quick Maintenance by Error Code ............... 7 5. Troubleshooting by Error Code ..............9 EC 51 (EEPROM Parameter Error Diagnosis and Solution) .........
  • Page 89 Troubleshooting Contents diagnosis and solution ....................20 5.11 PC 0F PFC module protection diagnosis and solution) ..........22 5.12 EC 72 (Lack phase failure of outdoor DC fan motor diagnosis and solution) ....23 5.13 PC 43 (Outdoor compressor lack phase protection diagnosis and solution) ....24 5.14 PC 45 (Outdoor unit IR chip drive failure) diagnosis and solution .........

  • Page 90: 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 91: General Troubleshooting

    2. General Troubleshooting Error Display (For Some Outdoor Unit) Display Malfunction or Protection Solution Outdoor EEPROM malfunction EC 51 Indoor / outdoor units communication error TS10 EL 01 Communication malfunction between adapter board and outdoor main board TS31 EL 16 IPM module protection TS14 PC 00...

  • Page 92: Outdoor Unit Point Check Function

    High temperature protection of evaporator PH 90 PH 91 Low temperature protection of evaporator 3. Outdoor Unit Point Check Function • A check switch is included on the outdoor PCB. • Push SW1 to check the unit’s status while running. The digital display shows the following codes each time the SW1 is pushed.
  • Page 93 Frequency limit caused by The display value is Bit7 IGBT radiator a hex number. For example, the digital Bit6 Reserved display show 2A, then Bit5 Reserved Bit5=1, Bit3=1, and Frequency limit caused by low Bit4 Bit1=1. temperature of T2.(LH00) Frequency limit caused by Frequency limit symbol Bit3 This means that a...

  • Page 94: Quick Maintenance By Error Code

    4. 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. Part requiring EC 07/71 EL 01...
  • Page 95 Indoor PCB Outdoor PCB Outdoor fan motor T3 Sensor TP Sensor Pressure sensor Reactor Compressor IPM module board Data adapter board High pressure valve assy High pressure protector Low pressure protector Additional refrigerant Electric control box  Troubleshooting 8 ...

  • Page 96: Troubleshooting By Error Code

    5. Troubleshooting by Error Code 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 97: El 01 (Indoor And Outdoor Unit Communication Error Diagnosis And Solution)

    EL 01 (Indoor and Outdoor Unit Communication Error Diagnosis and Solution) Description: Indoor unit can not communicate with outdoor unit Recommended parts to prepare: • Signal wires • Magnet ring • Indoor PCB • Outdoor PCB Troubleshooting and repair: Power off, then restart the unit 2 minutes later Check whether there’s any interference.

  • Page 98: Ec 07 (Fan Speed Is Operating Outside Of Normal Range)/Ec

    EC 07 (Fan Speed Is Operating Outside of Normal Range)/EC 71(Over Current Failure of Outdoor DC Fan Motor)/ EC73(Zero-speed failure of outdoor DC fan motor) Diagnosis and Solution Description: When indoor / outdoor fan speed keeps too low or too high for a certain time, the unit ceases operation and the LED displays the failure.
  • Page 99 Index: 1. Indoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1&pin2 of CN15, pin3 of CN34 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.

  • Page 100: Ec 53/Ec 52/Ec 54/Ec 57/Ec 5C (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solution)

    EC 53/EC 52/EC 54/EC 57/EC 5C (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. Recommended parts to prepare: • Connection wires •...

  • Page 101: Pc 00(Ipm Malfunction Or Igbt Over-Strong Current Protection Diagnosis And Solution)

    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 display LED shows “PC 00” and the AC turn off. Recommended parts to prepare: •...

  • Page 102: Pc 10(Outdoor Unit Low Ac Voltage Protection)/Pc

    PC 10(Outdoor unit low AC voltage protection)/PC 11(Outdoor unit main control board DC bus high voltage protection)/PC 12(Outdoor unit main control board DC bus high voltage protection /341 MCE error) Diagnosis and Solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: •...

  • Page 103: Pc 31(Low Pressure Protection Diagnosis And Solution)

    PC 31(Low Pressure Protection Diagnosis and Solution) Description: If the sampling voltage is not 5V, the LED displays a failure code. Recommended parts to prepare: • Connection wires • Low pressure protector • Indoor fan assembly • Outdoor PCB Troubleshooting and repair: Low pressure protection Low pressure protection Are the low pressure protector...

  • Page 104: Pc 02/Lc 06(Top Temperature Protection Of Compressor Or High Temperature Protection Of Ipm Module Diagnosis And Solution)

    PC 02/LC 06(Top temperature protection of compressor or High temperature protection of IPM module diagnosis and solution) Description: For some models with overload protector, If the sampling voltage is not 5V, the LED will display the failure. If the temperature of IPM module is higher than a certain value, the LED displays the failure code. Models without overload protector should be diagnosed according to the second flowchart.
  • Page 105 Check the fastening screws on the PCB and IPM radiator. Replace the outdoor Are they fixed tightly? control PCB. Tighten the screws and apply silicon grease.  Troubleshooting 18 ...

  • Page 106: Pc 40(Communication Error Between Outdoor Main Pcb And Ipm Board Diagnosis And Solution)

    PC 40(Communication error between outdoor main PCB and IPM board diagnosis and solution) Description: The main PCB cannot detect the IPM board. Recommended parts to prepare: • Connection wires • IPM board • Outdoor main PCB • Electric control box Troubleshooting and repair: Is there at least one LED in the compressor driven chip light?

  • Page 107: Pc 08(Current Overload Protection)/Pc 44(Outdoor Unit Zero Speed Protection)/ Pc

    5.10 PC 08(Current overload protection)/PC 44(Outdoor unit zero speed protection)/ PC 46(Compressor speed has been out of control)/PC 49(Compressor overcurrent failure) diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: •...
  • Page 108 Was the protection activated in standby? Is the power voltage is Restart the unit when the power normal? supply returns to normal Is outdoor terminal voltage Is the power wiring Reconnect the normal？ wired correctly? power wiring Is the voltage between L and Are L and N wired Reconnect L and N N is normal？...

  • Page 109: Pc 0F ( Pfc Module Protection Diagnosis And Solution)

    5.11 PC 0F PFC module protection diagnosis and solution) Description: When the voltage signal that IPM send to compressor drive chip is abnormal, the LED displays the failure code and the AC turns off. Recommended parts to prepare: • Connection wires •...

  • Page 110: Ec 72 (Lack Phase Failure Of Outdoor Dc Fan Motor Diagnosis And Solution)

    5.12 EC 72 (Lack phase failure of outdoor DC fan motor diagnosis and solution) Description: When the three-phase sampling current of the DC motor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code. Recommended parts to prepare: •...

  • Page 111: Pc 43 (Outdoor Compressor Lack Phase Protection Diagnosis And Solution)

    5.13 PC 43 (Outdoor compressor lack phase protection diagnosis and solution) Description: When the three-phase sampling current of the compressor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code Recommended parts to prepare: •...

  • Page 112: Pc 45 (Outdoor Unit Ir Chip Drive Failure) Diagnosis And Solution

    5.14 PC 45 (Outdoor unit IR chip drive failure) diagnosis and solution Description: When the IR chip detects its own parameter error, the LED displays the failure code when power on. Recommended parts to prepare: • Inverter module PCB. Troubleshooting and repair: Power off,then restart the unit 2 minutes later.

  • Page 113: Ec 55 (Outdoor Ipm Module Temperature Sensor Fault) Diagnosis And Solution

    5.16 EC 55 (Outdoor IPM module temperature sensor fault) diagnosis and solution Description: If the sampling voltage is 0V or 5V, the LED displays the failure code. Recommended parts to prepare: • IPM module PCB • Connection wires • Sensors •...

  • Page 114: Pc 30 (High Pressure Protection Diagnosis And Solution)

    5.17 PC 30 (High pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa Recommended parts to prepare: • Connection wires • Pressure switch • Outdoor fan • Outdoor main PCB Troubleshooting and repair: ...
  • Page 115 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 116: Pc 0A (High Temperature Protection Of Condenser Diagnosis And Solution)

    5.18 PC 0A (High temperature protection of condenser diagnosis and solution) Description: When the outdoor pipe temperature is more than 65°C, the unit stops. It starts again only when the outdoor pipe temperature is less than 52°C. Recommended parts to prepare: •...

  • Page 117: Pc 06 (Discharge Temperature Protection Of Compressor Diagnosis And Solution)30

    5.19 PC 06 (Discharge temperature protection of compressor diagnosis and solution) Description: If the compressor discharge temperature exceeds a certain level for nine seconds, the compressor ceases operation, the LED displays the failure code Recommended parts to prepare: • Connection wires •...

  • Page 118: El 16(Communication Malfunction Between Adapter Board And Outdoor Main Board Diagnosis And Solution)

    5.20 EL 16(Communication malfunction between adapter board and outdoor main board diagnosis and solution) Description: The adapter PCB cannot detect the main control board. Recommended parts to prepare: • Connection wires • Adapter board • Outdoor main PCB Troubleshooting and repair: Power off, then restart the unit after 3 minutes.

  • Page 119: Pc 41(Outdoor Compressor Current Sampling Circuit Failure Diagnosis And Solution)

    5.21 PC 41(Outdoor compressor current sampling circuit failure diagnosis and solution) Description: Three-phase sampling offset voltage error, the static bias voltage is normally 2.5V Recommended parts to prepare: • Outdoor main PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.

  • Page 120: Check Procedures

    8. Check Procedures 8.1 Temperature Sensor Check WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury. 1. Disconnect temperature sensor from PCB (Refer to Chapter 5. Indoor Disassembly and Chapter 6. Outdoor Disassembly). 2.
  • Page 121 Resistance Value ASM135D23UFZ ATM115D43UFZ2 ASN98D22UFZ ATQ360D1UMU Blue-Red Blue-Black 1.75Ω 1.87Ω 1.57Ω 0.37Ω Red-Black ATF235D22UMT Resistance Value ATF250D22UMT ATF310D43UMT KSK103D33UEZ3 ASM98D32UFZ KTF250D22UMT Blue-Red Blue-Black 0.75Ω 0.65Ω 2.13Ω 2.2Ω Red-Black ASN140D21UFZ Resistance Value ASK89D29UEZD KTM240D57UMT KSN140D58UFZ KSN140D21UFZ Blue-Red Blue-Black 1.28Ω 1.99Ω 0.62Ω 1.86Ω...

  • Page 122: Ipm Continuity Check

    KTQ420D1UMU ATN150D30UFZA ATQ420D1SN5A1 Resistance Value KTF310D43UMT KTM240D46UKT2 KTM240D43UKT EAPQ420D1UMUA EAPQ440D1UMUA Blue-Red Blue-Black 0.65Ω 1.03Ω 1.04Ω 0.37Ω Red-Black Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.3 IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting.
  • Page 123 Digital tester Resistance value Digital tester Resistance value (+)Red (-)Black (+)Red (-)Black ∞ ∞ (Several MΩ) (Several MΩ) Or test the conductivity of IPM with diode mode. Needle-type Tester Needle-type Tester Normal Value Normal Value Black Black Open-circuit 0.3-0.5V Needle-type Tester Needle-type Tester Normal Value Normal Value...
  • Page 124 8.4 Normal voltage of P and N 208-240V(1-phase) In standby around 310VDC In operation >310VDC 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.
  • Page 125 WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Disconnect the connector from outdoor PCB. 2. Measure the resistance value of each winding using a multi-meter. 3. Check the resistance value of each winding in the following table. Red Brown Blue Orange Yellow White Color of lead winding Normal Value...
  • Page 126 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Outdoor Unit Disassembly ..................3 Panel Plate .....................3 Electrical Parts .....................20 Fan Assembly ....................47 Fan Motor ....................48 Sound Blanket .....................49 Four-way Valve ....................50 Compressor ....................51...

  • Page 127: Outdoor Unit Disassembly

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board ACIQ-18-EHPB X330 PCB Board 11 ACIQ-18-HPB X430 PCB Board 3 ACIQ-24-HPB PCB Board 14 ACIQ-24-EHPB X430 PCB Board 3 ACIQ-30-EHPB PCB Board 14 ACIQ-30-HPB PCB Board 14...

  • Page 128: Panel Plate

    2. Outdoor Unit Disassembly 2.1 Panel Plate 1. 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...
  • Page 129 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 130 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 5 ...
  • Page 131 2.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 132 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 133 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 8 ...
  • Page 134 3. 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 3) Remove the screws of the top cover and then remove the top cover (4 Top Cover screws).
  • Page 135 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 136 Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (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 137 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 12 ...
  • Page 138 4. X630 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the top cover and then remove the top cover (7 Top Cover screws). (see CJ_X630_001). CJ_X630_001 3) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_X630_002).
  • Page 139 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_X630_003). Front Panel CJ_X630_003 5) Remove the screws of the big handle and then remove the big handle (4 screws) (see CJ_X630_004). Big Handle CJ_X630_004 Note: This section is for reference only.
  • Page 140 Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X630_005). Water Collecting Cover CJ_X630_005 7) Remove the screws of the rear net and then remove the rear net (4 screws) CJ_X630_006).
  • Page 141 Procedure Illustration 8) Remove the screws of the right panel and then remove the right panel (10 screws) (see CJ_X630_007). Right Panel CJ_X630_007 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 16 ...
  • Page 142 4. E30/590 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_E30_001). CJ_E30_001 3) Remove the screws of the top cover and then remove the top cover (4 screws).
  • Page 143 Procedure Illustration 1) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_E30_004). CJ_E30_004 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 18 ...
  • Page 144 Procedure Illustration 2) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_E30_005). CJ_E30_005 3) Remove the screws of the right panel and then remove the right panel (10 screws) (see CJ_E30_006). CJ_E30_006 Note: This section is for reference only.

  • Page 145: 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 1 ).
  • Page 146 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-...
  • Page 147 3. PCB board 3 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (5 screws and 2 CJ_ODU_PCB_003-1 ). hooks )(see Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 148 4. PCB board 4 Procedure Illustration 1) Remove the screws of the top cover. (1 screws) (see CJ_ODU_PCB_004- 1 ). 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 ).
  • Page 149 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 ).
  • Page 150 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...
  • Page 151 6. PCB board 6 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_006-1 ). (see CJ_ODU_PCB_006-1 2) Remove 8 screws on the electronic control board and then turn over the electronic control board (see CJ_ODU_PCB_006-2 ).
  • Page 152 Procedure Illustration 3) Pull out the two blue wires connected with the four way valve. connect to IPM board PFC Inductor CJ_ODU_PCB_006-3 )(for heat (see T3&T4 Compressor pump models) 4) Pull out connectors of the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp.
  • Page 153 7. PCB board 7 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_007-1 ). (see 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 ).
  • Page 154 Procedure Illustration 3) Pull out the connectors (see ODU_PCB_007-3 ). 4) Remove the 9 screws and unfix the 3 hooks and then remove the electronic control board(see ODU_PCB_007-3 ). CJ_ODU_PCB_007-3 5) Remove two screws and then remove the electronic control box subassembly on partition board CJ_ODU_PCB_007- assembly.
  • Page 155 Procedure Illustration 6) Remove two screws and two connectors and then remove the CJ_ODU_ inverter control board (see PCB_007-5 ). CJ_ODU_PCB_007-5 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 30 ...
  • Page 156 8. PCB board 8 Procedure Illustration 1) Remove 2 screws to disconnect the power supply wires. (see CJ_ODU_ PCB_008-1) 2) Remove 3 screws to disconnect ground wires. (see CJ_ODU_ PCB_008-1) 3) Disconnect the wires connected to main control board. (see CJ_ODU_ PCB_008-1) 4) Disconnect the wires between main control board and IPM module board.
  • Page 157 Procedure Illustration 1) Remove 2 screws to disconnect the power supply wires. (see CJ_ODU_ PCB_008-2) 2) Remove 3 screws to disconnect the wires connected to the compressor. (see CJ_ODU_PCB_008-2) 3) Remove 3 screws to remove the radiator.(see CJ_ODU_PCB_008-2) 4) Disconnect the wires between IPM module board and main control board.
  • Page 158 Procedure Illustration 1) Remove the 1 screw and disconnect the wires and then remove the key CJ_ODU_PCB_008-4 )(for board.(see some models) CJ_ODU_PCB_008-4(for some models) Note: This section is for reference only. Actual unit appearance may vary. 9. PCB board 9 Procedure Illustration 2) Remove 3 screws to disconnect the...
  • Page 159 Procedure Illustration 7) Remove 3 screws to disconnect the power supply wires. (see CJ_ODU_ PCB_009-1) 8) Remove 3 screws to disconnect ground wires. (see CJ_ODU_ PCB_009-1) 9) Disconnect the wires connected to main control board. (see CJ_ODU_ PCB_009-2) 10) Remove the 4 screws and unfix the 4 hooks and then remove the filter CJ_ODU_PCB_009-2 ) board.(see...
  • Page 160 10. PCB board 10 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_010-1 ). (see CJ_ODU_PCB_010-1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_010-2 ).
  • Page 161 Procedure Illustration 3) Pull out the connectors (see ODU_PCB_010-3 ). 4) Remove the 4 screws and then remove the electronic control CJ_ODU_PCB_010-3 ). board(see Note: When replacing the main control board with a new one, pay attention to applying thermal paste on the heat sink. CJ_ODU_PCB_010-3 5) Pull out the connector, remove one screw and then remove the key...
  • Page 162 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 ). 2) Remove the electronic control CJ_ODU_ box subassembly. (see CJ_ODU_PCB_011-1 PCB_011-2 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 163 12. PCB board 12 Procedure Illustration 1) Pull out the connectors (see ODU_PCB_012-1 ). 2) Remove the 9 screws and unfix the 3 hooks and then remove the electronic control board(see ODU_PCB_012-2 ). CJ_ODU_PCB_012-1 3) Disconnect the wires connected to main control board.
  • Page 164 13. PCB board 13 Procedure Illustration 1) Remove 4 screws unfix the radiator. (see CJ_ODU_PCB_013-1) 2) Remove 3 screws unfix the electronic control box assembly and partition board. (see CJ_ODU_PCB_013-1) 3) Remove 2 screws unfix the electronic control box assembly and terminal board subassembly.
  • Page 165 Procedure Illustration 5) Disconnect the wires connected to main control board. (see CJ_ODU_ PCB_013-3) 6) Remove the 4 screws and then remove the main control board.(see CJ_ODU_PCB_013-3 ) 7) Remove 1 screw to remove the key CJ_ODU_PCB_013-3 ). board .(see CJ_ODU_PCB_013-3 8) Disconnect the wires between filter board and main control board.
  • Page 166 Procedure Illustration 10) Remove the 2 screws and then remove the DR module box CJ_ODU_ subassembly.(see PCB_013-5 )(DR module box subassembly is on the back of the electronic control box assembly)(for some models) CJ_ODU_PCB_013-5(for some models) 11) Remove the 2 screws and then remove the DR module board.(see CJ_ODU_PCB_013-6 )(for some models)
  • Page 167 14. PCB board 14 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_014-1 ). (see CJ_ODU_PCB_014-1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_014-2 ).
  • Page 168 Procedure Illustration 3) Pull out the connectors (see ODU_PCB_014-3 ). 4) Remove the 4 screws and then remove the electronic control CJ_ODU_PCB_041-3 ). board(see Note: When replacing the main control board with a new one, pay attention to applying thermal paste on the heat sink. CJ_ODU_PCB_014-3 5) Remove the 1 screw and disconnect the wires and then remove the 24V...
  • Page 169 15. PCB board 15 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (7 screws)(see CJ_ODU_PCB_015-1 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured. CJ_ODU_PCB_015-1 2) Remove all of connectors (see Fig CJ_ODU_PCB_015-2 ).
  • Page 170 16. PCB board 16 Procedure Illustration 1) Remove the cover of electrical CJ_ODU_PCB_016- control box. (see 1 ). CJ_ODU_PCB_016-1 2) Disconnect the fan motor connector. CJ_ODU_PCB_016-2 ). (see CJ_ODU_PCB_016-2 3) Remove eight fixing screws. 4) Ture over the electronic control CJ_ODU_ box subassembly.
  • Page 171 Procedure Illustration 5) Remove 3 screws and then remove CJ_ODU_PCB_016- the bracket. (see 4 ). 6) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_016-4 ). 7) Remove 3 screws and then remove the electronic control board.(see CJ_ODU_PCB_016-4 ). CJ_ODU_PCB_016-4 8) Remove the 1 screw and disconnect the wires and then remove the 24V...

  • Page 172: Fan Assembly

    2.3 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_001-1&2). 2) Remove the fan. CJ_ODU_FAN_001-1 CJ_ODU_FAN_001-2 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 173: 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 174: 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 175 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 176 2.7 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;...
  • Page 177 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 178 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 179 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 180 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 181: 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 182 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 183 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 184 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 185 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 186 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 187 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 188 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 189 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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