Midea AURORA ONOFF Series Service Manual
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Midea AURORA ONOFF Series Service Manual

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SM_AB_R410A_ONOFF_AR_CE_NA_1912
AURORA ONOFF SERIES
SERVICE MANUAL

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Summary of Contents for Midea AURORA ONOFF Series

  • Page 1 SM_AB_R410A_ONOFF_AR_CE_NA_1912 AURORA ONOFF SERIES SERVICE MANUAL...
  • Page 3 Table of Contents §. Safety Precautions Precautions Information servicing(For flammable materials) §. Specifications Model Reference Pipe length and the Drop Height Electrical Wiring Diagrams §. Product Features Display Function Safety Features Basic Features Optional Features §. Maintenance First Time Installation Check Refrigerant Recharge Re-Installation §.
  • Page 4 Table of Contents §. Troubleshooting Safety Caution General Troubleshooting Complain Record Form Information Inquiry Error Diagnosis and Troubleshooting Without Error Code Quick Maintenance by Error Code Troubleshooting by Error Code Check Procedures Appendix Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) Temperature Sensor Resistance Value Table for TP(for some units) (°C –...
  • Page 6 Safety Precautions Contents Precautions ......................2 Information servicing(For flammable materials) ..........3...
  • Page 7 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 8 2. Information servicing(For • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable flammable materials) hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area •...
  • Page 9 • 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 10 • 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 11 • 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 12 Specifications Contents Model Reference ....................2 Pipe Length and Drop Height ................3 Electrical Wiring Diagrams ..................4...
  • Page 13 1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model. Indoor Unit Model Outdoor Unit Model Capacity (Btu/h) Power Supply MSABA-07HRN1-QC2[N](B) MOX130-07HN1-QC2 MSABA-09CRN1-QC2 MOAB32-09CN1-QC2 MSABA-09HRN1-QC2 MOAB30-09HN1-QC2 MSABA-09CRN1-QC2 MOX130-09CN1-QC2 MSABA-09HRN1-QC2 MOX130-09HN1-QC2 MSABA-09HRN1-QC2 MOX131-09HN1-QC2 MSABB-11CRN1-QC2 MOBA31-11CN1-QC2 MSABB-11HRN1-QC2 MOBA30-11HN1-QC2...
  • Page 14 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 15 3. Electrical Wiring Diagrams Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram MSABA-09CRN1-QC2 MOAB32-09CN1-QC2 16022000003485 MSABB-11CRN1-QC2 MOBA31-11CN1-QC2 MSABA-09CRN1-QC2 MOX130-09CN1-QC2 16022000003719 16022000031334 MSABB-11CRN1-QC2-)-[N] MOX130-11CN1-QC2 )-[N] MSABD-17CRN1-QC2 MOBA31-17CN1P-QC2 16022000002522 MSABD-17CRN1-QC2 MOBA32-17CN1P-QC2 MSABA-07HRN1-QC2[N](B) MOX130-07HN1-QC2...
  • Page 16 Indoor unit abbreviations Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LIVE NEUTRAL Heater The Electric Heating Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Outdoor unit abbreviations Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE...
  • Page 17 Indoor unit wiring diagram: 16022000003719...
  • Page 18 Indoor unit wiring diagram: 16022000003644...
  • Page 19 Indoor unit wiring diagram: 16022000003693 SWING MOTOR 16022000003693 OXYGEN ENRICHMENT FAN CAPACITOR BOARD OR ANION GENERATOR VERTICAL PC2_1 PC1_1 SWING MOTOR WHITE WHITE 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 CN_ION CN11 CN10...
  • Page 20 Indoor unit wiring diagram: 16022000003649 16022000003649 SWING MOTOR OXYGEN ENRICHMENT FAN CAPACITOR BOARD OR ANION GENERATOR VERTICAL PC2_1 PC1_1 SWING MOTOR WHITE WHITE 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 CN_ION CN11 CN10...
  • Page 21 Outdoor unit wiring diagram: 16022000003485 Pressure switch...
  • Page 22 Outdoor unit wiring diagram: 16022000002522 N O TE: 1. The w i r i ng di agr am i s f or expl anat i on pur pose onl y. The act ual shape of t he com ponent s m ay be di f f er ent .
  • Page 24 Outdoor unit wiring diagram: 16022000001950 TO INDOOR UNIT 16022000001950...
  • Page 25 Outdoor unit wiring diagram: 16022000031333 TO INDOOR UNIT TERMINAL 2(N) Pressure （ ） BLUE BLACK switch OR YELLOW Pressure BLACK switch port 4-WAY （ ） BLUE BLACK OR YELLOW CAPACITOR OVER LOAD PROTECTION BLUE COMPRESSOR R(M) CAPACITOR BLACK 16022000031333 This symbol indicates the element is MOTOR optional,the actual shape shall prevail...
  • Page 26 Outdoor unit wiring diagram: 16022000031334 TO INDOOR UNIT 2(N) Pressure switch T4/T3 OUTDOOR UNIT Pressure switch port CAPACITOR OVERLOAD RELAY (INTERNAL/ EXTERNAL DEPENDING ON MODELS) BLUE R(M) COMP CAPACITOR MOTOR BLACK This symbol indicates the element is optional , 16022000031334 the actual shape shall be prevail.
  • Page 27 Outdoor unit wiring diagram: 16022000002074 (OR BLACK) BLACK BLACK PTCR STARTER...
  • Page 28 Outdoor unit wiring diagram: 16022000002430 16022000002430...
  • Page 29 Outdoor unit wiring diagram: 16022000028330 2(N) 2(N)

  • Page 30: 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 ....................6 Drying Mode ....................7 Forced Operation Function ................7 Sleep Function ....................7 3.10 Auto-Restart Function ..................7 3.11 Refrigerant Leakage Detection ...............7 3.12 Ionizer/Plasma (for some models) ..............7 Optional Functions ....................8...

  • Page 31: 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 32: 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 33: Basic Functions

    3. Basic Functions Table Heating Mode Functions Auto Mode Defrosting Mode A=2°C(3.6°F), Cases Case1:T1 and T2 Case 2:T3 B=-3°C(-5.4°F) MSABA-07HRN1-QC2[N](B) MSABA-09CRN1-QC2 MSABA-09HRN1-QC2 MSABB-11CRN1-QC2 MSABB-11HRN1-QC2 MSABB-11CRN1-QC2-)-[N] Models MSABB-11HRN1-QC2)-[N] MSABB-12HRN1-QC2-[N] MSABD-17CRN1-QC2 MSABD-17HRN1-QC2 MSABD-17HRN1-QC0 MSABE-22CRN1-QC2 MSABE-21HRN1-QC2 Note: The detailed description of case 1 or case 2 is shown in the following function sections(from 3.5 to 3.6). ...

  • Page 34: Abbreviation

    Abbreviation 3.4.3 Outdoor Fan Control Outdoor units just have one single fan speed. The Unit element abbreviations operation of outdoor fan is consistent with the operation of compressor. Except the following situations: Abbreviation Element • Condenser high temperature protection Indoor room temperature •...

  • Page 35: Auto-Mode

    For above 18K models: heating mode: • Compressor current is over than I and lasts for defrost • The defrosting time has reached the setting value. Setting fan • T2≥2°C(3.6°F) after entering defrosting mode for 3 speed(Turbo) minutes. TE2-6 • After entering defrosting mode for 2 minutes, check the value of T2.

  • Page 36: Drying Mode

    • time on to auto mode; not higher than 30°C(86°F)) every hour. After 2 hours, the temperature stops rising and the indoor • the compressor doesn’t start in 20 minutes when a fan is fixed at low speed. running mode is set in auto. •...

  • Page 37: 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 38 Maintenance Contents First Time Installation Check .................2 Refrigerant Recharge ....................4 Re-Installation .......................5 Indoor Unit ....................5 Outdoor Unit ....................7...

  • Page 39: 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 40 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 41: Refrigerant Recharge

    2. Refrigerant Recharge mA A Procedure: Close both 2- and 3-way valves. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode to charge 3-way service port. the system with liquid refrigerant. Connect the charge hose to the valve at the bottom When the electronic scale displays the correct of the cylinder.

  • Page 42: Re-Installation

    3. Re-Installation Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi). Connect the charge hose with the push pin of Handle Lo to the 3-way valve’s gas service port.
  • Page 43 Air purging with vacuum pump Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations.

  • Page 44: Outdoor Unit

    Outdoor Unit Evacuation for the whole system Procedure: Wait for 5 minutes then check whether the gauge Confirm that the 2- and 3-way valves are opened. needle moves after turning off the vacuum pump. If Connect the vacuum pump to the 3-way valve’s the gauge needle moves backward, check whether service port.
  • Page 45 Refrigerant charging mA A Procedure: Close both 2- and 3-way valves. Fully open the Handle Lo manifold valve, 2- and 3-way valves. Slightly connect the Handle Lo charge hose to the 3-way service port. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant.
  • Page 46 Indoor Unit Disassembly Contents Dimension ......................2 Indoor Unit Disassembly ..................3 Front Panel ....................3 Electrical parts ....................9 Evaporator ....................13 Fan motor and fan ..................15 Step motor ....................17 Drain Hose ....................18...

  • Page 47: 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  Indoor Unit Disassembly 2 ...

  • Page 48: Indoor Unit Disassembly

    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_ INV_001). CJ_AB_INV_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_AB_ INV_002).
  • Page 49 Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AB_INV_003). Horizontal Louver Hook CJ_AB_INV_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AB_INV_004).
  • Page 50 Procedure Illustration 5) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it. (see CJ_AB_INV_005). CJ_AB_INV_005 6) Disconnect the connector for display board. (see CJ_AB_INV_006) . CJ_AB_INV_006 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 51 Procedure Illustration 7) Slid the front panel side to side to release each axis (see CJ_AB_INV_007) CJ_AB_INV_007 8) Open the screw cap and then remove the 3 screws (see CJ_AB_INV_008). CJ_AB_INV_008 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 52 Procedure Illustration 9) Release the hooks with hands. (see CJ_AB_INV_009) CJ_AB_INV_009 10) Release the 5 hooks in the back (see CJ_AB_INV_010). CJ_AB_INV_010 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger.
  • Page 53 Procedure Illustration 12) Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see CJ_AB_ INV_012). CJ_AB_INV_012 13) Remove 1 screw of the display board. (see CJ_AB_INV_013). 14) Rotate the display board in the direction shown in the right picture.

  • Page 54: 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_INV_014).
  • Page 55 Procedure Illustration 4) Remove the fixed devices of the connectors (see CJ_AB_INV_016). CJ_AB_INV_016 5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see CJ_AB_INV_017). CJ_AB_INV_017 6) Open the left side plate of electronic control box (see CJ_AB_INV_018). CJ_AB_INV_018 Note: This section is for reference only.
  • Page 56 Procedure Illustration 7) Open the two clips on the front of the electric box. (see CJ_AB_INV_019) CJ_AB_INV_019 8) Open the upper cover plate of electronic control box (see CJ_AB_ INV_020). CJ_AB_INV_020 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 57 Procedure Illustration 9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see CJ_AB_INV_021). CJ_AB_INV_021 Display board 10) Pull out the electrical main board along the direction indicated in right image to remove it (see CJ_AB_ INV_022).

  • Page 58: 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_INV_023). CJ_AB_INV_023 2) Remove the 1 screws on the evaporator located at the fixed plate (see CJ_AB_ INV_024).
  • Page 59 Procedure Illustration 3) Release the hook on the evaporator (see CJ_AB_INV_025). CJ_AB_INV_025 Remote the one screw on the evaporator located at the fixed plate (see CJ_AB_ INV_026). CJ_AB_INV_026 4) Pull out the evaporator (see CJ_AB_ INV_027). CJ_AB_INV_027 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 60: 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_ INV_028).
  • Page 61 Procedure Illustration 3) Remove the fixing screw (see CJ_AB_ INV_030). 4) Pull out the fan motor and fan assembly from the side. CJ_AB_INV_030 Fixing Screw Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 16 ...

  • Page 62: Step Motor

    2.5Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the two screws, then remove the stepping motor (see CJ_AB_INV_031). Stepping Motor CJ_AB_INV_031 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 63: Drain Hose

    2.6 Drain Hose Procedure Illustration 1) Rotate the fixed wire clockwise indicated in right image (see CJ_AB_INV_032). CJ_AB_INV_032 2) Pull up the drain hose to remove it (see CJ_AB_INV_033). CJ_AB_INV_033 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 64 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Dimension ......................3 Outdoor Unit Disassembly ..................14 Panel Plate ....................14 Electrical Parts .....................33 Fan Assembly ....................45 Fan Motor ....................46 Sound blanket .....................47 Four-way valve .....................48 Compressor ....................49...

  • Page 65: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board MOX130-07HN1-QC2 X130 PCB Board 1 MOAB32-09CN1-QC2 AB30 PCB Board 1 MOAB30-09HN1-QC2 AB30 PCB Board 1 MOX130-09CN1-QC2 X130 PCB Board 1 MOX130-09HN1-QC2 X130 PCB Board 1 MOX131-09HN1-QC2 X130 PCB Board 1 MOBA31-11CN1-QC2...

  • Page 66: Dimension

    2. Dimension AA30 Panel Plate  Outdoor Unit Disassembly 3 ...
  • Page 67 AB30 Panel Plate  Outdoor Unit Disassembly 4 ...
  • Page 68 BA30 Panel Plate  Outdoor Unit Disassembly 5 ...
  • Page 69 For US models:  Outdoor Unit Disassembly 6 ...

  • Page 70: Panel Plate

    Panel Plate  Outdoor Unit Disassembly 7 ...
  • Page 71 For US models:  Outdoor Unit Disassembly 8 ...
  • Page 72 CA30 Panel Plate  Outdoor Unit Disassembly 9 ...
  • Page 73 For US models:  Outdoor Unit Disassembly 10 ...
  • Page 74 Panel Plate  Outdoor Unit Disassembly 11 ...
  • Page 75 For US models:  Outdoor Unit Disassembly 12 ...
  • Page 76 X130 Panel Plate  Outdoor Unit Disassembly 13 ...
  • Page 77 3. Outdoor Unit Disassembly Panel Plate 1. AA30 / AB30 Procedure Illustration 1) Turn off the air conditioner and the power breaker. Big Handle 2) Remove the screws of the big handle and then remove the big handle (1 screws) (see CJ_AA30_001). CJ_AA30_001 Top Cover 3) Remove the screws of the top cover...
  • Page 78 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (6 screws) (see CJ_AA30_003). Front Panel CJ_AA30_003 5) Remove the screws of water collecting cover (1 screw) (see CJ_AA30_004). Water Collecting Cover CJ_AA30_004 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 79 Procedure Illustration 6) Remove the screws of the rear net and then remove the rear net (2 screws) CJ_AA30_005). (for some (see models) CJ_AA30_005 7) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_AA30_006). Right Panel CJ_AA30_006 Note: This section is for reference only.
  • Page 80 2. BA30 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 (1 screws) (see CJ_BA30_001). CJ_BA30_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 81 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_BA30_003). Front Panel CJ_BA30_003 5) Remove the screws of water collecting Water Collecting Cover cover (1 screw) (see CJ_BA30_004). CJ_BA30_004 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 82 Procedure Illustration 6) Remove the screws of the rear net and then remove the rear net (2 (for some screws) (see CJ_BA30_005). models) CJ_BA30_005 7) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_BA30_006). Right Panel CJ_BA30_006 Note: This section is for reference only.
  • Page 83 3. B30 Procedure Illustration 1) Turn off the air conditioner and the power breaker. Big Handle 2) Remove the screws of the big handle and then remove the big handle (1 screws) (see CJ_B30_001). CJ_B30_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 84 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_B30_003). Front Panel CJ_B30_003 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_ Water Collecting Cover B30_004).
  • Page 85 Procedure Illustration 6) Remove the screws of the rear net and then remove the rear net (2 screws) CJ_B30_005). (for some models) (see CJ_B30_005 7) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_B30_006). Right Panel CJ_B30_006 Note: This section is for reference only.
  • Page 86 4. CA30 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 Big Handle (1 screws) (see CJ_CA30_001). CJ_CA30_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 87 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_CA30_003). Front Panel CJ_CA30_003 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_ CA30_004).
  • Page 88 Procedure Illustration 6) Remove the screws of the rear net and then remove the rear net (2 screws) CJ_CA30_005). (for some (see models) CJ_CA30_005 7) Remove the screws of the right panel and then remove the right panel (7 screws) (see CJ_CA30_006). Right Panel CJ_CA30_006 Note: This section is for reference only.
  • Page 89 5. 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 90 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 91 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 92 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 29 ...
  • Page 93 6. 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 screws) (see CJ_X130_001). CJ_X130_001 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 94 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screw) (see CJ_ X130_003). 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 95 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X130_006). CJ_X130_005 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 32 ...

  • Page 96: Electrical Parts

    Electrical parts Antistatic gloves must be worn when you disassemble the electronic box. WARNING: Note: Remove the air outlet grille(refer to 3.1 Panel Plate) before disassembling electrical parts. PCB for ON-OFF Models 1. PCB board 1 Procedure Illustration 1) Remove the two screws fixed the electronic control board (see CJ_ ODU_PCB_001).
  • Page 97 Procedure Illustration 8) For models with subzero refrigeration control board, remove 3 screws of it showed in the figure. CJ_ODU_PCB_001-03 9) The subzero refrigeration control board is in the back of the medal sheet. CJ_ODU_PCB_001-04 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 98 2. PCB board 2 Procedure Illustration Fan Motor 1) Disconnect the wires connected to the compressor. (Red wire connects 4-Way Valve Compressor with PCB board, others connects with terminals) (see CJ_ODU_PCB_002-1) 2) Disconnect the connectors for fan motor. (Blue wire, red wire, brown wire and black wire.
  • Page 99 3. PCB board 3 Procedure Illustration Earth wire 1) Disconnect the connectors for fan Fan motor motor (see CJ_ODU_PCB_003). 2) Disconnect the wires connected to the compressor (see CJ_ODU_ PCB_003). 3) Disconnect the wires connected to Pipe temperature sensor (see CJ_ ODU_PCB_003).
  • Page 100 PCB for Inverter Models 3. PCB board 4 Procedure Illustration 1) Remove the screws of the top cover. CJ_ODU_PCB_004- (2 screws) (see 1 ). CJ_ODU_PCB_004-1 2) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_004-2 ).
  • Page 101 4. 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 4-Way Valve 2) Disconnect the connector for fan CJ_ODU_PCB_005-1 motor from the electronic control CJ_ODU_PCB_005-2 ). board (see 3) Remove the connector for the Reactor CJ_ODU_PCB_005-...
  • Page 102 5. PCB board 6 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (5 screws and 2 CJ_ODU_PCB_006-1 ). hooks )(see CJ_ODU_PCB_006-1 2) Disconnect the connector for fan motor from the electronic control CJ_ODU_PCB_006-2 ).
  • Page 103 6. PCB board 7 Procedure Illustration 1) Remove the screws of the top cover. CJ_ODU_PCB_007- (1 screws) (see 1 ). CJ_ODU_PCB_007-1 2) Unfix the hooks and then open the electronic control box cover (5 hooks) CJ_ODU_PCB_007-2 ). (see CJ_ODU_PCB_007-2 3) Disconnect the connector for fan motor from the IPM board (see ODU_PCB_007-3 ).
  • Page 104 Procedure Illustration 5) Pull out the wire connected with the CJ_ODU_PCB_007-4 ). 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_007-4 ). sensor(TP) (see 7) Disconnect the electronic expansion CJ_ODU_PCB_007- valve wire (see Fig 4 ).
  • Page 105 7. PCB board 8 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_008-1 ). (see 2) Disconnect the connector for outdoor DC fan from the electronic CJ_ODU_ control board (see PCB_008-2 ). 3) Remove the connector for the CJ_ODU_PCB_008- compressor (see...
  • Page 106 3. PCB board 9 Procedure Illustration 1) Disconnect the connector for compressor and release the ground wire(1 screw). (see CJ_ODU_ PCB_009-1 ). 2) Pull out the wires from electrical supporting plate and turn over the CJ_ODU_PCB_009-1 electronic control assembly. (see CJ_ODU_PCB_009-2 ).
  • Page 107 Procedure Illustration 4) Remove the fixing board (2 hooks) CJ_ODU_PCB_009-4 ). (see 5) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_009-4 CJ_ODU_PCB_009-3 ). DC Fan Compressor T3, T4, TP AC Fan 6) Then remove the electronic control Power supply board (4 hooks).

  • Page 108: Fan Assembly

    Fan Assembly Note: Remove the panel plate (refer to 3.1 Panel Plate) before disassembling fan or remove air outlet grille before disassembling fan. Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ FAN_001). 2) Remove the fan. D-cut CJ_ODU_FAN_001 Note: This section is for reference only.

  • Page 109: 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 110: Sound Blanket

    Sound blanket Note: Remove the panel plate (refer to 3.1 Panel plate) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_BLANKET_001). Sound Blanket(top) Sound Blanket(side) CJ_ODU_BLANKET_001 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 111 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 112: 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 113 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 114 Troubleshooting Contents Safety Caution .......................2 General Troubleshooting ..................3 Complain Record Form ..................4 Information Inquiry ....................6 Error Diagnosis and Troubleshooting Without Error Code .........7 Remote maintenance ..................7 Field maintenance ..................8 Quick Maintenance by Error Code ..............13 Troubleshooting by Error Code ................14 E1/EH 00 (Indoor EEPROM parameter error diagnosis and solution) ....14 E2/EH 02 (Zero-crossing detection error diagnosis and solution) ....15 E3/EH 03/E8/ EC 07 (Fan speed is operating outside of the normal range...

  • Page 115: Safety Caution

    1. Safety Caution WARNING Be sure to turns 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 116: 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 117: 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 Working Mode □Cooling □Heating...
  • Page 118 Parameter Checking information by Remote controller Displaying code Displaying code meaning Display value Display value meaning Room temperature Indoor coil temperature Outdoor coil temperature Approval from Manufacturer □Approved □More Proof needed □Rejected  Troubleshooting 5 ...

  • Page 119: 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 120: Error Diagnosis And Troubleshooting Without Error Code

    5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turns 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 TS9 - TS10...

  • Page 121: Field Maintenance

    Field maintenance Problem Solution Unit will not start TS11 - TS12 Compressor will not start but fans run TS11 - TS12 Compressor and condenser (outdoor) fan will not start TS11 - TS12 Evaporator (indoor) fan will not start TS11 - TS12 Condenser (Outdoor) fan will not start TS11 - TS12 Unit runs, but shortly stops...
  • Page 122 1.Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ The power switch is on but fans will not start ☆ ☆ ☆ The temperature on the display board cannot be set ☆...
  • Page 123 1.Remote Maintenance Others Possible causes of trouble Unit will not start The power switch is on but fans will not start ☆ The temperature on the display board cannot be set Unit is on but the wind is not cold(hot) Unit runs, but shortly stops The unit starts up and stops frequently ☆...
  • Page 124 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 125 2.Field Maintenance Refrigerant Circuit Others Possible causes of trouble Unit will not start Compressor will not start but fans run ☆ Compressor and condenser (outdoor) fan will not start Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start Unit runs, but shortly stops ☆...

  • Page 126: 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. Part requiring replacement E1/EH 00 E2/EH 02...

  • Page 127: Troubleshooting By Error Code

    7. Troubleshooting by Error Code E1/EH 00 (Indoor EEPROM parameter error diagnosis and solution) Description: Indoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.

  • Page 128: 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 • Indoor PCB Troubleshooting and repair: Check the connections and power supply.

  • Page 129: E3/Eh 03/E8/ Ec 07 (Fan Speed Is Operating Outside Of The Normal Range Diagnosis And Solution)

    E3/EH 03 / E8/ EC 07 (Fan speed is operating outside of the normal range diagnosis and solution) Description: When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED displays the failure code. Recommended parts to prepare: •...
  • Page 130 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 131 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 132: E5/Eh 60/E6/Eh 61/E7/Ec 52 (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solution)

    E5/EH 60/E6/EH 61/E7/EC 52 (Open 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: • Connection wires •...

  • Page 133: 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-2°C does not keep continuous 4 seconds and this situation happens 3 times,the LED displays the failure code and AC turns off.

  • Page 134: E9/El 01 (Indoor / Outdoor Unit Communication Error Diagnosis And Solution)

    E9/EL 01 (Indoor / outdoor unit communication error diagnosis and solution) Description: The indoor unit has not received feedback from the outdoor unit for 120 seconds, four consecutive times Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Reactor Troubleshooting and repair: Power off, then restart the unit after 2 minutes.
  • Page 135 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) . When AC is normal running, the voltage will move alternately between -25V to 25V.

  • Page 136: P6/Pc 03 (High Pressure Protection)

    P6/PC 03 (High pressure protection) Description: If the current is less than setting value for 4 seconds, AC shuts off and restarts after 3 minutes in cooling mode or after 4 minutes in heating mode. If this happens 8 times, the unit stops and the LED displays the failure code. Recommended parts to prepare: •...

  • Page 137: 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 138 8.2 Fan Motor Check 1. Turn off outdoor unit and disconnect power supply 2. Disconnect outdoor fan motor power cord from outdoor PCB 3. Measure the resistance value between each windings. The normal value of different motor show as follows: YKFG-13-4-38L Model YKFG-15-4-28-1...
  • Page 139 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 140 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 141 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 142 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 143 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 144 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 145 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 146 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 147 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 148 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 149 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 150 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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