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Mars Comfort-Aire Century A-DVH09SG-0 Service Manual

Inverter single zone ductless mini-split
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COMFORT-AIRE A-DVH09SG-0
Owner's Manual
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A-DVH09SG-0
Find Your COMFORT-AIRE HVAC Parts - Select From 1486 Models
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Summary of Contents for Mars Comfort-Aire Century A-DVH09SG-0

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. COMFORT-AIRE A-DVH09SG-0 Owner's Manual Shop genuine replacement parts for COMFORT-AIRE A-DVH09SG-0 Find Your COMFORT-AIRE HVAC Parts - Select From 1486 Models -------- Manual continues below --------...
  • Page 2 Service Manual DVH Series Inverter Single Zone Ductless Mini-Split DVH09SG-0 DVH09SG-1 DVH12SG-0 DVH12SG-1 DVH18SG-1 DVH24SG-1 www.marsdelivers.com...

  • Page 3: Table Of Contents

    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 Functions Safety Features Basic Features Optional Features §. Maintenance First Time Installation Checks Refrigerant Recharge Re-Installation §.
  • Page 4 Table of Contents §. Troubleshooting Safety Caution General Troubleshooting Complaint 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 5: Safety Precautions

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

  • Page 6: Precautions

    1. Precautions CAUTION To prevent personal injury, or property or unit damage, • • While unpacking be careful of sharp edges around adhere to all precautionary measures and instructions the unit as well as the edges of the fins on the con- denser and evaporator.

  • Page 7: Information Servicing(For Flammable Materials)

    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 8: Detection Of Flammable Refrigerants

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

  • Page 9: Charging Procedures

    • The refrigerant charge shall be recovered into the • Before attempting the procedure ensure that: correct recovery cylinders. The system shall be flushed • mechanical handling equipment is available, if with OFN to render the unit safe. This process may required, for handling refrigerant cylinders;...
  • Page 10 • Empty recovery cylinders are evacuated and, if • The recovered refrigerant shall be returned to the possible, cooled before recovery occurs. refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not • The recovery equipment shall be in good working mix refrigerants in recovery units and especially not in order with a set of instructions concerning the cylinders.

  • Page 11: Specifications

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

  • Page 12: Model Reference

    1. Model Reference Refer to the following table to determine the specifi c indoor and outdoor unit model. Indoor Unit Model Outdoor Unit Model Capacity (Btu) Power Supply 115V~ , 60Hz, A-DVH09SG-0 B-DVH09SG-0 1Phase 208/230V~, 60Hz, A-DVH09SG-1 B-DVH09SG-1 1Phase 208/230V~, 60Hz, A-DVH12SG-1 B-DVH12SG-1 1Phase...

  • Page 13: Pipe Length And The Drop Height

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

  • Page 14: 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 16022000020318 A-DVH09SG-0 B-DVH09SG-0 A-DVH09SG-1 B-DVH09SG-1 16022000019673 B-DVH12SG-1 16022000019673 A-DVH12SG-1 16022000019694 A-DVH12SG-0 B-DVH12SG-0 16022000020318 B-DVH18SG-1 16022000019673 A-DVH18SG-1 B-DVH24SG-1 A-DVH24SG-1 16022000020500...
  • Page 15 Indoor unit abbreviations Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LIVE NEUTRAL Heater The Electric Heating Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Outdoor unit abbreviations Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE...
  • Page 16 Outdoor unit wiring diagram: 16022000020318 L N Y/G TO I N D O O R U N I T 4-WAY BLUE CRANKCASE HEATER BLACK HEATER CN 7 OPTIONAL: DC-FAN Specifications 6...
  • Page 17 Outdoor unit wiring diagram: 16022000019673 BLUE OR BLACK BROWN I N D O O R U N I T 4-WAY CRANKCASE HEATER HEATER BLUE BLACK CN 7 OPTIONAL: DC-FAN Specifications 7...
  • Page 18 Outdoor unit wiring diagram: 16022000019694 16022000019694 O PTI O N AL Y/ G I O N CN12_1 CN12_2 H EATER CN6_1 CN6_2 OPTIONAL INDOOR WIRING DIAGRAM OPTIONAL Specifications 8...
  • Page 19 Outdoor unit printed circuit board diagram: 17122000019195 Specifications 9...
  • Page 20 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 HEAT1 CN17 connect to compressor heater, 100-130V AC when is ON 4-WAY CN60 connect to 4 way valve, 100-130V AC when is ON.
  • Page 21 Outdoor unit printed circuit board diagram: 17122000002718 Specifications 11...
  • Page 22 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (208-230V AC input) L_in: connect to L-line (208-230V AC input) CN16 S: connect to indoor unit communication HEAT1 CN17 connect to compressor heater, 208-230V AC when is ON 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
  • Page 23 Product Features Contents Display Function ....................2 Safety Features ......................3 Basic Functions .......................4 Table ......................4 Abbreviation ....................5 Fan Mode ......................5 Cooling Mode ....................5 Heating Mode(Heat Pump Units) ..............5 Auto-mode ....................7 Drying Mode ....................7 Forced Operation Function ................7 Sleep Function ....................7 3.10 Auto-Restart Function ..................7 3.11 Refrigerant Leakage Detection ...............8 3.12 Ionizer/Plasma (for some models) ..............8 Optional Functions ....................9...

  • Page 24: Product Features 2

    1. Display Function Unit display functions Function Display Activation of Timer ON, Fresh, Swing, Turbo, or Silent (3s) Cancellation of Timer OFF, Fresh, Swing, Turbo, or Silent (3s) Defrost Warming in heating mode Self-clean (available on select units only) Heating in room temperature under 8°C ECO function (available on select units only) Lights up in different color according to the operation...

  • Page 25: Safety Features

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

  • Page 26: Basic Functions

    3. Basic Functions Table Cooling Mode&Heating mode Heating Mode Functions Auto Mode Outdoor Fan Control Defrosting Mode Case 1: 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 B-DVH09SG-0 B-DVH09SG-1 B-DVH12SG-1 B-DVH12SG-0 Models B-DVH18SG-1 B-DVH24SG-1...

  • Page 27: 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 28: Indoor Fan Control

    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 29: Auto-Mode

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

  • Page 30: Refrigerant Leakage Detection

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

  • Page 31: Optional Functions

    4. Optional Functions Follow me • If you press “Follow Me” on the remote, the indoor 4 4 6 6 °F Heating unit will beep. This indicates the follow me function is active. In heating mode, the temperature can be set to as low as 8°C, preventing the indoor area from freezing if •...

  • Page 32: Maintenance

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

  • Page 33: First Time Installation Check

    1. First Time Installation Check Air and moisture trapped in the refrigerant system affects To prevent air and moisture from affecting the air the performance of the air conditioner by: conditioner’s performance, the indoor unit, as well as the pipes between the indoor and outdoor unit, must be be •...
  • Page 34 Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations. are closed.

  • Page 35: Refrigerant Recharge

    2. Refrigerant Recharge 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 36: Re-Installation

    3. Re-Installation Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi). Connect the charge hose with the push pin of Handle Lo to the 3-way valve’s gas service port.
  • Page 37 Air purging with vacuum pump Procedure: • 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 38: Outdoor Unit

    Outdoor Unit Evacuation for the whole system Procedure: Wait for 5 minutes then check whether the gauge Confirm that the 2- and 3-way valves are opened. needle moves after turning off the vacuum pump. If Connect the vacuum pump to the 3-way valve’s the gauge needle moves backward, check whether service port.
  • Page 39 Refrigerant charging 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 40 Indoor Unit Disassembly Contents Dimension ......................2 Indoor Unit Disassembly ..................3 Front Panel ....................11 Electrical parts ....................21 Evaporator ....................22 Fan motor and fan ..................23 Step motor ....................24 Drain Hose ....................25...

  • Page 41: Dimension

    1. Dimension Model W(in) D(in) H(in) 28.43 7.36 11.42 31.57 7.44 11.69 37.99 8.46 12.56 42.52 8.90 13.19 49.57 11.10 14.25  Indoor Unit Disassembly 2  Indoor Unit Assembly 2...

  • Page 42: 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 43 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 44: Indoor Unit Assembly

    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 45 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 46 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 47 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 48: Electrical Parts

    2.2 Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration Ground Screws 1) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB_INV_014).
  • Page 49 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 50 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 51 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 52: Evaporator

    2.3 Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AB_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 53 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 54: Fan Motor And Fan

    2.4 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_AB_ INV_028).
  • Page 55 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 56: Step Motor

    2.5 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 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.

  • Page 57: 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 58 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Dimensions s ......................3 Outdoor Unit Disassembly ..................9 Panel Plate .....................9 Electrical Parts .....................11 Fan Assembly ....................21 Fan Motor ....................22 Sound blanket .....................23 Four-Way Valve................24 Compressor ....................25...

  • Page 59: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board A-DVH09SG-0 BA30 PCB4 A-DVH09SG-1 BA30 PCB4 A-DVH12SG-1 PCB4 A-DVH12SG-0 PCB4 A-DVH18SG-1 PCB4 A-DVH24SG-1 PCB6  Outdoor Unit Disassembly 2  Outdoor Unit Assembly 2...

  • Page 60: Panel Plate

    9 9 k k Panel Plate 30.67 19.17 11.81 30.32 2.76 0.98 2.42 0.47  Outdoor Unit Disassembly 5  Outdoor Unit Assembly 3...
  • Page 61 For US models: 9k  Outdoor Unit Disassembly 6  Outdoor Unit Assembly 4...
  • Page 62 12, 18, 24 Panel Plate 32.09 20.24 13.11 31.50 2.76 2.44 0.79 2.43  Outdoor Unit Disassembly 7  Outdoor Unit Assembly 5...
  • Page 63 For US models: 12, 18, 24  Outdoor Unit Disassembly 8  Outdoor Unit Assembly 6...
  • Page 64 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 65 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 66 Procedure Illustration 6) Remove the screws of the rear net and then remove the rear net (2 screws) (see CJ_BA30_005). (for some 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 67 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 68 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 69 Procedure Illustration 6) Remove the screws of the rear net and then remove the rear net (2 screws) (see CJ_B30_005). (for some models) 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 70: 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 71 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 72 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 73 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 74 PCB for Inverter Models 3. PCB board 4 Procedure Illustration 1) Remove the screws of the top cover. (2 screws) (see CJ_ODU_PCB_004- 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 ). 3) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_PCB_004-3 ).
  • Page 75 4. PCB board 5 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_005-1 ). 4-Way Valve 2) Disconnect the connector for fan CJ_ODU_PCB_005-1 motor from the electronic control board (see CJ_ODU_PCB_005-2 ). 3) Remove the connector for the Reactor compressor (see CJ_ODU_PCB_005-...
  • Page 76 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 hooks )(see CJ_ODU_PCB_006-1 ). CJ_ODU_PCB_006-1 2) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_PCB_006-2 ).
  • Page 77 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) (see CJ_ODU_PCB_007-2 ). CJ_ODU_PCB_007-2 3) Disconnect the connector for fan motor from the IPM board (see ODU_PCB_007-3 ).
  • Page 78 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 79 7. PCB board 8 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_PCB_008-1 ). 2) Disconnect the connector for outdoor DC fan from the electronic control board (see CJ_ODU_ PCB_008-2 ). 3) Remove the connector for the compressor (see CJ_ODU_PCB_008- 2 ).

  • Page 80: Fan Assembly

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

  • Page 81: 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 82: 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 83: 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 84: 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 85 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 86: 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 E0 / F4 (EEPROM parameter error diagnosis and solution) ......18 E1 (Indoor and outdoor unit communication error diagnosis and solution) ...19 E2 (Zero-crossing detection error diagnosis and solution) ......21...
  • Page 87 Troubleshooting Contents F0 (Overload current protection diagnosis and solution) .......28 P0 (IPM malfunction or IGBT over-strong current protection diagnosis and solution) ......................29 7.10 P1 (Over voltage or too low voltage protection diagnosis and solution) ..30 7.11 P2 (High temperature protection of IPM module diagnosis and solution) ..31 7.12 P4 (Inverter compressor drive error diagnosis and solution) ......32 Check Procedures ....................33...

  • Page 88: 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 89: 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 90 Error Display (For 18K And Above 18K Outdoor Unit) There are 2 LED lights (RED color and GREEN color) welded in outdoor main board. After power on, LED show different actions when encounter different problems. Problem LED(GREEN) LED(RED) Solution Standby normally Operate normally Compressor driven chip EEPROM parameter error TS18...

  • Page 91: 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 92 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 93: 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 94 Displayed Displayed code Explanation Meaning Additional Notes value Room temperature 1. All displayed temperatures use actual values. Indoor coil temperature 2. All temperatures are -1F,-1E,-1d,-1c,- -25,-24,-23,-22, displayed in °C regardless Outdoor coil 1b,-1A -21,-20 of remote used. temperature -19—99 -19—99 3.
  • Page 95 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25 Troubleshooting 10   Troubleshooting 10...

  • Page 96: 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 97: 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 98 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 99 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 100 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 101 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 102: 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 Indoor PCB...

  • Page 103: Troubleshooting By Error Code

    7. Troubleshooting by Error Code E0 / F4 (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 104: E1 (Indoor And Outdoor Unit Communication Error Diagnosis And Solution)

    E1 (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 • Reactor Troubleshooting and repair: Power off, then restart the unit after 2 minutes. Does a problem remain? The unit is operating normally Measure Vs.
  • Page 105 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 106: E2 (Zero-Crossing Detection Error Diagnosis And Solution)

    E2 (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 107: E3 / F5

    E3 / F5 (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 unit will stop and the LED will display the failure. Recommended parts to prepare: •...
  • Page 108 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 109 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 110: Solution)

    E4/E5/F1/F2/F3 (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 will display the failure. Recommended parts to prepare: • Connection wires • Sensors •...

  • Page 111: E7 (Indoor Pcb / Display Board Communication Error Diagnosis And Solution)

    E7 (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 112: Ec (Refrigerant Leakage Detection Diagnosis And Solution)

    EC (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 display area will show “EC”...

  • Page 113: F0 (Overload Current Protection Diagnosis And Solution)

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

  • Page 114: P0(Ipm Malfunction Or Igbt Over-Strong Current Protection Diagnosis And Solution)

    P0(IPM malfunction or IGBT over-strong current protection diagnosis and solution) Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “P0” and the AC turn off. Recommended parts to prepare: • Connection wires •...

  • Page 115: P1(Over Voltage Or Too Low Voltage Protection Diagnosis And Solution)

    7.10 P1(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 • PCB •...

  • Page 116: P2(High Temperature Protection Of Ipm Module Diagnosis And Solution)

    7.11 P2(High temperature protection of IPM module diagnosis and solution) Description: If the temperature of IPM module is higher than a certain value, the LED will display the failure. Recommended parts to prepare: • Outdoor PCB • IPM module board Troubleshooting and repair: Check the fastening screws on the PCB and IPM radiator.

  • Page 117: P4(Inverter Compressor Drive Error Diagnosis And Solution)

    7.12 P4(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: • Connection wires •...

  • Page 118: 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 119 Resistance Value KSK103D33UEZ3 KSN140D21UFZ KTM240D57UMT Blue-Red Blue-Black 2.02Ω 1.28Ω 0.62Ω Red-Black Note: The picture and the value are only for reference, actual condition and specific value may vary.  Troubleshooting 30  Troubleshooting 34...

  • Page 120: Ipm Continuity Check

    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. Turn off outdoor unit and disconnect power supply. 2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged. 3.
  • Page 121 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 122 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 123 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 124: Pressure On Service Port

    iii) Pressure On Service Port Cooling chart(R410A): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.1 10.6 75/63 (23.89/17.22) 10.7 11.2 80/67 (26.67/19.44) 11.2 11.9 90/73 (32.22/22.78) 10.5 10.3 10.0 10.6 12.4 13.0 70/59 (21.11/15) 75/63 (23.89/17.22)
  • Page 125 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 126 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 127 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 128 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 129 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 130 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 131 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 132 System Pressure Table-R32 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.909 -61.436 1850 18.5 268.25 28.425 83.165 21.75 -43.635 -46.543 1900 275.5 29.447 85.005 -37.323 -35.181 1950 19.5 282.75 30.448 86.806 36.25 -32.15 -25.87 2000 31.431 88.576 43.5 -27.731 -17.916 2050...
  • Page 133 1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com 7/2021...

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