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Infinity Living EZ-12W-M Service Manual

Air handler & single-zone condenser
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INFINITY LIVING AIR HANDLER & SINGLE-ZONE CONDENSER
WITH DIYCOOL TECHNOLOGY
SERVICE MANUAL
Models Covered:
EZ-12WPL-HP115
EZ-18W-M*
EZ-24W-M*
EZ-36W-M*
EZ-12ZPL-HP115
EZ-18ZPL-HP230
EZ-24ZPL-HP230
EZ-36ZPL-HP230
*This manual also includes service information for 18K-36K air handlers used in Infinity Living multi-zone systems
with DIYCOOL technology. For 9K (EZ-09W-M) & 12K (EZ-12W-M) multi-zone air handler service information, please
refer to the separate manual specifically for them.
VERSION DATE: 05-13-24

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Summary of Contents for Infinity Living EZ-12W-M

  • Page 1 EZ-24ZPL-HP230 EZ-36ZPL-HP230 *This manual also includes service information for 18K-36K air handlers used in Infinity Living multi-zone systems with DIYCOOL technology. For 9K (EZ-09W-M) & 12K (EZ-12W-M) multi-zone air handler service information, please refer to the separate manual specifically for them.
  • 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

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

  • Page 7: Operation And Maintenance

    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: Work Procedure

    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: 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 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

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

  • Page 13: Model Reference

    1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model. Outdoor Unit Model Indoor Unit Model Capacity (Btu/h) Power Supply EZ-12ZPL-HP115 EZ-12WPL-HP115 115V~ , 60Hz, 1Phase EZ-18ZPL-HP230 EZ-18W-M EZ-24ZPL-HP230 EZ-24W-M 208/230V~, 60Hz, 1Phase EZ-36ZPL-HP230 EZ-36W-M ...
  • 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: Electrical Wiring Diagrams

    3. Electrical Wiring Diagrams Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram EZ-12WPL-HP115 EZ-12ZPL-HP115 16022000035851 EZ-18W-M EZ-18ZPL-HP230 16022000035849 16022000019694 EZ-24W-M EZ-24ZPL-HP230 EZ-36W-M EZ-36ZPL-HP230 16022000036331 Outdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board...
  • 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 20 BLACK BLUE COMP_ T OP OPTIOna l CN3 2 CN2 9 CN2 6 CN3 0 CN4 2 CN1 6 BLACK BLUE BLUE CN2 0 OPTIONAL HE AT1 CN 8 BLACK CN2 1 WHITE OPTIONAL HE AT2 CN3 6 BLACK CN1 2 CN 11 CN2 7 BLUE...
  • Page 21 Outdoor unit printed circuit board diagram: 17122000047115...
  • Page 22 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (100-130V AC input) L_in: connect to L-line (100-130V AC input) CN16 S: connect to indoor unit communication 4-WAY CN60 connect to 4 way valve, 100-130V AC when is ON. HEAT1 CN17 connect to compressor heater, 100-130V AC when is ON...
  • Page 23 Outdoor unit printed circuit board diagram: 17122000048064& 17122000048066 RC 2 VU B...
  • Page 24 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 25 Outdoor unit printed circuit board diagram: 17122000047742...
  • Page 26 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 27 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 28: Table Of Contents

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

  • Page 29: 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 30: 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 31: Basic Functions

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

  • Page 32: Abbreviation

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

  • Page 33: Defrosting Mode

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

  • Page 34: Auto-Mode

    Case 1-1(for some models): • Indoor fan will run at auto fan speed. • The louver operates same as in relevant mode. • If any one of the following conditions is satisfied, the unit enters defrosting mode. • If the machine switches mode between heating and cooling, the compressor will keep stopping for certain •...

  • Page 35: Sleep Function

    Sleep function • If the unit was in forced cooling mode, it will run in this mode for 30 minutes and turn to auto mode with • The sleep function is available in cooling, heating, or temperature set to 24°C(76°F). auto mode.

  • Page 36: 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 37: Maintenance

    Maintenance Contents Refrigerant Recharge ....................2...

  • Page 38: Refrigerant Recharge

    1. Refrigerant Recharge mA A Procedure: Close both 2- and 3-way valves. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant. Slightly connect the Handle Lo charge hose to the 3-way service port. When the electronic scale displays the correct weight (refer to the gauge and the pressure of the Connect the charge hose to the valve at the bottom low side to confirm, the value of pressure refers to...
  • Page 39 Indoor Unit Disassembly Contents Dimension ......................2 Indoor Unit Disassembly(7k~24k).................3 Front Panel ....................3 Electrical parts ....................9 Evaporator ....................13 Fan motor and fan ..................15 Step motor ....................17 Drain Hose ....................18 Indoor Unit Disassembly(27k~36k)..............19 Front Panel ....................19 Electrical parts .....................26 Evaporator ....................28 Fan motor and fan ..................30 Step motor ....................32 Drain Hose ....................34...

  • Page 40: 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 41: Indoor Unit Disassembly(7K~24K)

    2. Indoor Unit Disassembly 2.1 Front Panel Procedure Illustration 1) Hold the front panel by the tabs on Front Panel the both sides and lift it (see CJ_ AB_001). CJ_AB_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_AB_002).
  • Page 42 Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AB_003). Horizontal Louver Hook CJ_AB_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AB_004).
  • Page 43 Procedure Illustration 5) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it. (see CJ_AB_005). CJ_AB_005 6) Disconnect the connector for display board. (see CJ_AB_006) . CJ_AB_006 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 44 Procedure Illustration 7) Slid the front panel side to side to release each axis (see CJ_AB_007) CJ_AB_007 8) Open the screw cap and then remove the 3 screws (see CJ_AB_008). CJ_AB_008 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 45 Procedure Illustration 9) Release the hooks with hands. (see CJ_AB_009) CJ_AB_009 10) Release the 5 hooks in the back (see CJ_AB_010). CJ_AB_010 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger.
  • Page 46 Procedure Illustration 12) Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see CJ_ AB_012). CJ_AB_012 13) Remove 1 screw of the display board. (see CJ_AB_013). 14) Rotate the display board in the direction shown in the right picture.

  • Page 47: Electrical Parts

    2.2 Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration Ground Screws 1) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB_014).
  • Page 48 Procedure Illustration 4) Remove the fixed devices of the connectors (see CJ_AB_016). CJ_AB_016 5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see CJ_AB_017). CJ_AB_017 6) Open the left side plate of electronic control box (see CJ_AB_018). CJ_AB_018 Note: This section is for reference only.
  • Page 49 Procedure Illustration 7) Open the two clips on the front of the electric box. (see CJ_AB_019) CJ_AB_019 8) Open the upper cover plate of electronic control box (see CJ_ AB_020). CJ_AB_020 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 50 Procedure Illustration 9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see CJ_AB_021). CJ_AB_021 Display board 10) Pull out the electrical main board along the direction indicated in right image to remove it (see CJ_AB_022). Terminal (1L) Terminal (W) Terminal (S)

  • Page 51: Evaporator

    2.3 Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AB_023). CJ_AB_023 2) Remove the 1 screws on the evaporator located at the fixed plate (see CJ_AB_024).
  • Page 52 Procedure Illustration 3) Release the hook on the evaporator (see CJ_AB_025). CJ_AB_025 Remote the one screw on the evaporator located at the fixed plate (see CJ_AB_026). CJ_AB_026 4) Pull out the evaporator (see CJ_AB_027). CJ_AB_027 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 53: Fan Motor And Fan

    2.4 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_ AB_028).
  • Page 54 Procedure Illustration 3) Remove the fixing screw (see CJ_AB_030). 4) Pull out the fan motor and fan assembly from the side. CJ_AB_030 Fixing Screw Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 16 ...

  • Page 55: Step Motor

    2.5Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the two screws, then remove the stepping motor (see CJ_AB_031). Stepping Motor CJ_AB_031 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 56: Drain Hose

    2.6 Drain Hose Procedure Illustration 1) Rotate the fixed wire clockwise indicated in right image (see CJ_AB_032). CJ_AB_032 2) Pull up the drain hose to remove it (see CJ_AB_033). CJ_AB_033 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 57: Indoor Unit Disassembly(27K~36K)

    3. Indoor Unit Disassembly(27k~36k) Front Panel Procedure Illustration 1) Hold the front panel by the tabs on the both sides and lift it (see CJ_ AB(36)_001). CJ_AB(36)_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_ AB(36)_002).
  • Page 58 Procedure Illustration 3) Open the horizontal louver(below) and bend the louver lightly to loosn the leftmost hook, then push the hook towards right to loosn the sencond hook. (see CJ_AB(36)_003). 4) Remove the horizontal louver(below) towords left.(see CJ_AB(36)_003). CJ_AB(36)_003 5) Remove the horizontal louver(above) with the same way.(see CJ_ AB(36)_004).
  • Page 59 Procedure Illustration 6) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it. (see CJ_AB(36)_005). CJ_AB(36)_005 7) Pull out the connector wire, and then disconnect the connector for display board. (see CJ_AB(36)_006) . CJ_AB(36)_006 Note: This section is for reference only.
  • Page 60 Procedure Illustration 8) Slid the front panel side to side to release each axis (see CJ_AB(36)_007) CJ_AB(36)_007 9) Open the screw caps and then remove the 4 screws. (see CJ_AB(36)_008). 10) Remove the 4 screws fixing the panel frame.(see CJ_AB(36)_008). CJ_AB(36)_008 Note: This section is for reference only.
  • Page 61 Procedure Illustration 11) Release the hooks with hands. (see CJ_AB(36)_009) CJ_AB(36)_009 12) Release the 5 hooks in the back (see CJ_AB(36)_010). CJ_AB(36)_010 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 23 ...
  • Page 62 Procedure Illustration 13) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger. (see CJ_AB(36)_011) CJ_AB(36)_011 14) Remove 1 screw of the display board. (see CJ_AB(36)_012). CJ_AB(36)_012 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 63 Procedure Illustration 15) Rotate the display board in the direction shown in the right picture. CJ_AB(36)_013 ) (see CJ_AB(36)_013 16) Remove 1 screw of the wifi module . (see CJ_AB(36)_014). CJ_AB(36)_014 17) Rotate the wifi module in the direction shown in the right picture. (see CJ_AB(36)_015) CJ_AB(36)_015 Note: This section is for reference only.

  • Page 64: Electrical Parts

    3.2 Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration 1) Remove 2 fixing screws of electrical control box subassembly. (see CJ_ AB(36)_016). CJ_AB(36)_016 2) Disconnect the connectors.(see CJ_ AB(36)_017).
  • Page 65 Procedure Illustration 3) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB(36)_018). 4) Remove one fixing screw of the electronic control box and two screws used for the ground connection (see CJ_AB(36)_018). 5) Remove fixed clamp of temperature sensor (see CJ_AB(36)_018).
  • Page 66 Procedure Illustration 6) Pull out the electrical main board along the direction indicated in right image. (see CJ_AB(36)_019). CJ_AB(36)_019 7) Disconnect the connectors and remove main control board. (see CJ_ AB(36)_020). CJ_AB(36)_020 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 67: Evaporator

    3.3 Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AB(36)_021). CJ_AB(36)_021 2) Remove the 3 screws on the evaporator located at the fixed plate (see CJ_ AB(36)_022).
  • Page 68 Procedure Illustration 3) Remote the 4 screws fixing the fan motor cover (see CJ_AB(36)_023). CJ_AB(36)_023 4) Pull out the evaporator (see CJ_ AB(36)_024). CJ_AB(36)_024 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 30 ...

  • Page 69: Fan Motor And Fan

    3.4 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the bearing sleeve (see CJ_ AB(36)_025).

  • Page 70: Step Motor

    3.5 Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the 3 screws, then remove the horizontal swing motor(above)(see CJ_ AB(36)_027). CJ_AB(36)_027 2) Remove the 2 screws, then remove the horizontal swing motor(below)(see CJ_ AB(36)_028) 3) Remove 1 screw, then remove the ionizer...
  • Page 71 Procedure Illustration 4) Remove 1 screw, then remove the Positive and negative ion generator. (see CJ_ AB(36)_029).(for some units)’ CJ_AB(36)_029 5) Remove 2 screws, then remove the vertical swing motor (see CJ_AB(36)_030).(for some units) CJ_AB(36)_030 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 72: Drain Hose

    2.6 Drain Hose Procedure Illustration 1) Pull up the drain hose to remove it (see CJ_AB(36)_031). CJ_AB(36)_031 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 34 ...
  • Page 73 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Dimension ......................3 Outdoor Unit Disassembly ..................16 Panel Plate ....................16 Electrical Parts .....................29 Fan Assembly ....................44 Fan Motor ....................45 Sound blanket .....................46 Four-way valve .....................47 Compressor ....................48...

  • Page 74: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board EZ-12ZPL-HP115 X230 PCB Board 8 EZ-18ZPL-HP230 X430 PCB Board 3 EZ-24ZPL-HP230 PCB Board 3 EZ-36ZPL-HP230 PCB Board 9  Outdoor Unit Disassembly 2 ...

  • Page 75: Dimension

    2. Dimension 2.1. X130 Panel Plate  Outdoor Unit Disassembly 3 ...
  • Page 76 For US models:  Outdoor Unit Disassembly 4 ...
  • Page 77 2.2. X230 Panel Plate  Outdoor Unit Disassembly 5 ...
  • Page 78 For US models(Rounded grille):  Outdoor Unit Disassembly 6 ...
  • Page 79 For US models(Square grille):  Outdoor Unit Disassembly 7 ...
  • Page 80 2.3. X330 Panel Plate  Outdoor Unit Disassembly 8 ...
  • Page 81 For US models(Rounded grille):  Outdoor Unit Disassembly 9 ...
  • Page 82 For US models(Square grille):  Outdoor Unit Disassembly 10 ...
  • Page 83 2.4. X430 Panel Plate  Outdoor Unit Disassembly 11 ...
  • Page 84 For US models(Rounded grille):  Outdoor Unit Disassembly 12 ...
  • Page 85 For US models(Square grille):  Outdoor Unit Disassembly 13 ...
  • Page 86 2.5. Panel Plate  Outdoor Unit Disassembly 14 ...
  • Page 87 For US models:  Outdoor Unit Disassembly 15 ...
  • Page 88 3. Outdoor Unit Disassembly Panel Plate 1. D30 Procedure Illustration 1) Turn off the air conditioner and the Big Handle power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_D30_001). CJ_D30_001 Top Cover 3) Remove the screws of the top cover...
  • Page 89 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 90 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 91 Procedure Illustration 8) Remove the screws of the right panel and then remove the right panel (8 screws) (see CJ_D30_007). Right Panel CJ_D30_007 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 19 ...
  • Page 92 2. X130 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X130_001). Big Handle CJ_X130_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 93 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X130_003). Water Collecting Cover CJ_X130_003 5) Remove the screws of the front panel and then remove the front panel (6 screws(onoff models) or 8 screws(inverter models) (see CJ_ X130_004).
  • Page 94 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X130_005). Right Panel CJ_X130_005 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 22 ...
  • Page 95 3. X230/X330 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screws) (see CJ_X230_001). Big Handle CJ_X230_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (4 screws).
  • Page 96 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 97 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X230_005). Right Panel CJ_X230_005 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 25 ...
  • Page 98 4. X430 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X430_001). Big Handle CJ_X430_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 99 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 100 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 28 ...

  • Page 101: 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 102 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 103 3. PCB board 3 Procedure Illustration 1) Remove the 5 screws and unfix two hooks, then remove the electronic control box subassembly.(see ODU_PCB_003-1 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured. CJ_ODU_PCB_003-1 Note: This section is for reference only.
  • Page 104 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 105 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 106 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 107 6. PCB board 6 Procedure Illustration 1) Disconnect the connector for compressor and release the ground wire(1 screw,for some models ). (see CJ_ODU_PCB_006-1 ). CJ_ODU_PCB_006-1 2) Remove the electronic control CJ_ODU_ box subassembly. (see PCB_006-2 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 108 7. PCB board 7 Procedure Illustration 1) Unfix the hooks and then open the cover (4 hooks)(see CJ_ODU_ PCB_007-1 ). CJ_ODU_PCB_007-1 2) Remove 4 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_007-2 ). (see Note:Electronic installing box cannot be opened, so the voltage between P and N...
  • Page 109 Procedure Illustration 3) Remove two screws and then remove the electronic control box subassembly on partition board CJ_ODU_PCB_007- assembly. (see 3 ). CJ_ODU_PCB_007-3 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 37  ...
  • Page 110 Procedure Illustration 6) Remove two screws and two connectors and then remove the CJ_ODU_ inverter control board (see PCB_007-4 ). CJ_ODU_PCB_007-4 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 38 ...
  • Page 111 8. PCB board 8 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_ wire(1 screw). (see PCB_0011-1 ). 2) Remove the electronic control CJ_ODU_ box subassembly. (see CJ_ODU_PCB_008-1 PCB_008-2 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 112 9. PCB board 9 Procedure Illustration 1) Unfix the hooks and then open the cover (4 hooks)(see CJ_ODU_ PCB_009-1 ). CJ_ODU_PCB_009-1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_009-2 ). (see Note:Electronic installing box cannot be opened, so the voltage between P and N...
  • Page 113 Procedure Illustration 3) Pull out the connector, remove one screw and then remove the key board subassembly on terminal board. (see CJ_ODU_PCB_009-3 ) (for some models). CJ_ODU_PCB_009-3 Note: This section is for reference only. Actual unit appearance may vary. Outdoor Unit Disassembly 41 ...
  • Page 114 PCB board 10 Procedure Illustration 1) Disconnect the connector for CJ_ODU_PCB_010- compressor. (see 1 ). 2) Remove the screws of cover of electronic control box(5 screws). (see CJ_ODU_PCB_010-1 ). 3) Turn over the electronic control box subassembly CJ_ODU_PCB_010-1 4) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_010-2 ).
  • Page 115 11. PCB board 11 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_ wire(1 screw). (see PCB_011-1 ). CJ_ODU_PCB_011-1 2) Remove the electronic control box subassembly. (see CJ_ODU_ PCB_011-2 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.

  • Page 116: Fan Assembly

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

  • Page 117: 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 118: 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 119: Four-Way Valve

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

  • Page 120: 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 121 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 122: Troubleshooting

    Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Complain Record Form ..................6 Information Inquiry ....................8 Error Diagnosis and Troubleshooting Without Error Code .......11 Remote maintenance ...................11 Field maintenance ..................12 Quick Maintenance by Error Code ..............17 Troubleshooting by Error Code ................18 EH 00/EH 0A / EC 51 (EEPROM parameter error diagnosis and solution) ..18 EL 01 (Indoor and outdoor unit communication error diagnosis and solution) 19 EH 02 (Zero-crossing detection error diagnosis and solution) ......21...
  • Page 123 Troubleshooting Contents PC 08 (Current overload protection diagnosis and solution) ......28 PC 00 (IPM malfunction or IGBT over-strong current protection diagnosis and solution) ......................29 7.10 PC 01 (Over voltage or too low voltage protection diagnosis and solution) ..30 7.11 PC 02 (High temperature protection of IPM module or high pressure protection diagnosis and solution) ................31 7.12 PC 04 (Inverter compressor drive error diagnosis and solution) .....33 7.13 PC 03 (High pressure protection or low pressure protection diagnosis and...

  • Page 124: 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 125: 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 table: Operation Timer...
  • Page 126 High temperature protection of IPM module or High pressure 3 times FLASH TS31 PC 02 protection(for some models) 5 times FLASH Inverter compressor drive error TS33 PC 04 1 time FLASH Current overload protection(for some models) TS28 PC 08 7 times FLASH High pressure protection or low pressure protection(for some models) TS34...

  • Page 127: 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 128 Parameter Checking information by Remote controller Displaying code Displaying code meaning Display value Display value meaning Room temperature Indoor coil temperature Outdoor coil temperature Ambient temperature Outlet temperature of indoor coil Discharge temperature Sunction temperature Targeted Frequency Actual Frequency Indoor fan speed Outdoor fan speed EXV opening steps Compressor continuous...

  • Page 129: 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 130 Displayed Displayed code Explanation Meaning Additional Notes value 1. All displayed temperatures Room temperature use actual values. Indoor coil temperature 2. All temperatures are -1F,-1E,-1d,-1c,- -25,-24,-23,-22, displayed in °C regardless Outdoor coil 1b,-1A -21,-20 of remote used. temperature -19—99 -19—99 3.
  • Page 131 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25  Troubleshooting 10 ...

  • Page 132: Error Diagnosis And Troubleshooting Without Error Code

    5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start TS13 - TS14...

  • Page 133: Field Maintenance

    Field maintenance Problem Solution Unit will not start TS15 - TS16 Compressor will not start but fans run TS15 - TS16 Compressor and condenser (outdoor) fan will not start TS15 - TS16 Evaporator (indoor) fan will not start TS15 - TS16 Condenser (Outdoor) fan will not start TS15 - TS16 Unit runs, but shortly stops...
  • Page 134  Troubleshooting 13 ...
  • Page 135 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 136 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 137 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 138: Quick Maintenance By Error Code

    6. Quick Maintenance by Error Code If you do not have the time to test which specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring replacement EH 00/...

  • Page 139: Troubleshooting By Error Code

    7. Troubleshooting by Error Code EH 00/ EH 0A / 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 140: 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: • Indoor PCB • Outdoor PCB • Short-circuited component Troubleshooting and repair: Power off, then restart the unit after 2 minutes.
  • Page 141 Remarks: • Use a multimeter to test the DC voltage between 2 port(or S or L2 port) and 3 port(or N or S port) of outdoor unit. The red pin of multimeter connects with 2 port(or S or L2 port) while the black pin is for 3 port(or N or S port) . •...

  • Page 142: Eh 02 (Zero-Crossing Detection Error Diagnosis And Solution)

    EH 02 (Zero crossing detection error diagnosis and solution) Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Recommended parts to prepare: • Connection wires • PCB Troubleshooting and repair: Check the connections and power supply.

  • Page 143: Eh 03 / Ec 07 (Fan Speed Is Operating Outside Of The Normal Range Diagnosis And Solution)

    EH 03 / EC 07 (Fan speed is operating outside of normal range diagnosis and solution) Description: When indoor / outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off. Recommended parts to prepare: •...
  • Page 144 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 145 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 146: Eh 60/Eh 61/Ec 53/Ec 52/Ec 54/Ec 56 (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solution)

    EH 60/EH 61/EC 53/EC 52/EC 54/EC 56 (Open circuit or short circuit of temperature sensor diagnosis and solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code. Recommended parts to prepare: •...

  • Page 147: Eh 0B (Indoor Pcb / Display Board Communication Error Diagnosis And Solution)

    EH 0b (Indoor PCB / Display board communication error diagnosis and solution) Description: Indoor PCB does not receive feedback from the display board. Recommended parts to prepare: • Communication wire • Indoor PCB • Display board Troubleshooting and repair: Power off, then restart the unit 2 minutes later Is it still displaying the error code? The unit functions normally...

  • Page 148: El 0C (Refrigerant Leakage Detection Diagnosis And Solution)

    EL 0C (Refrigerant Leakage Detection diagnosis and solution) Description: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 < Tcool-1°C(1.8°F) does not keep continuous 4 seconds and compressor running frequency higher than 50Hz does not keep for 3 minutes, and this situation happens 3 times, the LED displays the failure code and AC turns off.

  • Page 149: Pc 08 (Current Overload Protection Diagnosis And Solution)

    PC 08 (Current overload protection diagnosis and solution) Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Connection wires • Reactor • Outdoor fan • Outdoor PCB Troubleshooting and repair: Was the protection activated Was the protection activated in standby?

  • Page 150: 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 LED displays the failure code and the AC turns off. Recommended parts to prepare: •...

  • Page 151: Pc 01(Over Voltage Or Too Low Voltage Protection Diagnosis And Solution)

    7.10 PC 01(Over voltage or too low voltage protection diagnosis and solution) Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: • Power supply wires • IPM module board •...

  • Page 152: Pc 02(High Temperature Protection Of Ipm Module Or High Pressure Protection Diagnosis And Solution)

    7.11 PC 02(High temperature protection of IPM module or High pressure protection diagnosis and solution) Description: If the temperature of IPM module is higher than a certain value, the LED displays the failure code. For some models with high pressure switch, outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa, the LED displays the failure code.
  • Page 153 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 154: Pc 04(Inverter Compressor Drive Error Diagnosis And Solution)

    7.12 PC 04(Inverter compressor drive error diagnosis and solution) Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Recommended parts to prepare: •...

  • Page 155: Pc 03(High Pressure Protection Or Low Pressure Protection Diagnosis And Solution)

    7.13 PC 03(High pressure protection or Low pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa or outdoor pressure switch cut off the system because low pressure is lower than 0.13 MPa, the LED displays the failure code. Recommended parts to prepare: •...
  • Page 156 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 157 Low pressure protection Low pressure protection Are the low pressure protector Are the low pressure protector and main control board wired and main control board wired Reconnect the low pressure protector and main Reconnect the low pressure protector and main properly? properly? control board...

  • Page 158: 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 the temperature sensor from PCB (Refer to Chapter 5&6. Indoor&Outdoor Unit Disassembly). 2.
  • Page 159 Resistance Value ASM135D23UFZ ATQ420D1UMU ASN98D22UFZ ATF235D22UMT ATQ360D1UMU Blue-Red Blue-Black 1.75Ω 0.37Ω Ω 0.75Ω 0.37Ω 1.57 Red-Black Resistance Value ATM115D43UFZ2 ATF250D22UMT ATF310D43UMT KSK103D33UEZ3(YJ) ASM98D32UFZ Blue-Red Blue-Black 1.87Ω 0.75Ω 0.65Ω 2.13Ω 2.2Ω Red-Black Resistance Value ASN140D21UFZ ASK89D29UEZD KSN140D21UFZ KTM240D57UMT KSK103D33UEZ3 Blue-Red Blue-Black 1.28Ω...
  • Page 160 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. 1.
  • Page 161 Note: The picture and the value are only for reference, actual condition and specific value may vary. Troubleshooting  ...
  • Page 162 8.4 Indoor AC Fan Motor Check 1) Power off and disconnect fan motor power cord from PCB. Measure the resistance value of each winding by using the multi-meter. The normal value show as follows . YKFG-13-4-38L Model YKFG-15-4-28-1 YKFG-20-4-10L YKFG-20-4-5-11 YKFG-13-4-38L-4 Brand Welling...
  • Page 163 8.5 4-way Valve Check 1. Power on, use a digital tester to measure the voltage, when the unit operates in cooling, it is 0V. When the unit operates in heating, it is about 230VAC. If the value of the voltage is not in the range, the PCB must have problems and need to be replaced. Red Brown Blue Orange Yellow White 2 Turn off the power, use a digital tester to measure the resistance.
  • Page 164 8.6 EXV Check 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.
  • Page 165 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 166 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 167 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 168 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 169 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 170 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 171 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 172 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 173 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 174 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 175 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 176 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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