ZenAire MSAFA-09HRDN1-BN10W Service Manual
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ZenAire MSAFA-09HRDN1-BN10W Service Manual

Inverter (16 seer)
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ZENAIRE INVERTER (16 SEER)
SERVICE MANUAL

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Summary of Contents for ZenAire MSAFA-09HRDN1-BN10W

  • Page 1 ZENAIRE INVERTER (16 SEER) SERVICE MANUAL...

  • Page 3: Table Of Contents

    Table of Contents Page 1. Safety Precautions ..................1 In case of Accidents or Emergency Pre-Installation and Installation Operation and Maintenance 2. Specifications ....................3 Model Reference Electrical Wiring Diagrams 3. Product Features ................... 11 Operation Modes and Functions 4. Maintenance and Disassembly ..............18 Maintenance Disassembly 5.

  • Page 5: Safety Precautions

    Safety Precautions Contents In Case of Accidents or Emergency ..............2 Pre-Installation .......................2 Operation and Maintenance .................2...

  • Page 6: In Case Of Accidents Or Emergency

    To prevent personal injury, or property or unit damage, CAUTION adhere to all precautionary measures and instructions • • While unpacking be careful of sharp edges around outlined in this manual. Before servicing a unit, refer to this the unit as well as the edges of the fins on the con- service manual and its relevant sections.

  • Page 7: Specifications

    Specifications Contents Model Reference ....................4 Electrical Wiring Diagrams ..................5 Indoor Unit ....................5 Outdoor Unit ....................7...

  • Page 8: Model Reference

    1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. Indoor Unit Model Outdoor Unit Model Capacity (Btu) Power Supply MSAFA-09HRDN1-BN10W MOBA30-09HDN1-BQ0W 115V~, 60Hz, 1Phase MSAFB-12HRDN1-BN10W MOBA30-12HDN1-BQ0W MSAFA-09HRDN1-MN10W...

  • Page 9: Electrical Wiring Diagrams

    Electronic Dust Collector LIVE NEUTRAL Heater The Electric Heating Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger MSAFA-09HRDN1-BN10W; MSAFA-09HRDN1-MN10W; MSAFB-12HRDN1-BN10W; MSAFB-12HRDN1-MN10W; MSAFC- 18HRDN1-MN10W; MSAFD-24HRDN1-MN10W OPTIONAL OPTIONAL INDOOR WIRING DIAGRAM Applicable to AC motor only 5(3or2)
  • Page 10 Outdoor Unit Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alternating Current FAN DC-FAN Direct Current FAN AC Current Detector COMP Compressor Coil Temperature of Condenser Outdoor Ambient Temperature Compressor Suction Temperature Compressor Discharge Temperature Electric Expansive Valve L-PRO Low Pressure Switch H-PRO High Pressure Switch ...

  • Page 11: Outdoor Unit

    MOBA30-09HDN1-BQ0W; MOBA30-12HDN1-BQ0W TO I N D O O R U N I T 4-WAY BLUE CRANKCASE HEATER BLACK HEATER CN 7 OPTIONAL: DC-FAN  Page 7 ...
  • Page 12 MOBA30-09HDN1-MQ0W; MOBA30-12HDN1-MQ0W 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 MOB30-18HDN1-MQ0W; MOCA30-23HDN1-MQ0W Applicable to Applicable to the units adopting the units adopting DC motor only AC motor only HEATER 2 CN4(CN5)
  • Page 13 PCB board of MOBA30-09HDN1-BQ0W; MOBA30-12HDN1-BQ0W PCB board of MOBA30-09HDN1-MQ0W; MOBA30-12HDN1-MQ0W  Page 9 ...
  • Page 14 PCB board of MOB30-18HDN1-MQ0W; MOCA30-23HDN1-MQ0W After power on, LED3(Green color) and LED2(Red color) will be flash if the unit has some problems。 Problems LED3(Green) LED3(Red) IU display standby for normal Operation normally IPM malfunction or IGBT over-strong current FLASH protection Over voltage or too low voltage protection EEPROM parameter error FLASH...

  • Page 15: Product Features

    Product Features Contents Operation Modes and Functions ................12 Abbreviation ....................12 Safety Features ....................12 Display Function ..................13 Fan Mode ....................13 Cooling Mode .....................13 Heating Mode .....................14 Auto-mode ....................14 Drying Mode ....................14 Forced Operation Function ................14 1.10 Sleep Function .....................15 1.11 Auto-Restart Function ..................15 1.12 Refrigerant Leakage Detection ..............15 1.13 8°C Heating(Optional) ................15...

  • Page 16: Operation Modes And Functions

    1. Operation Modes and Functions Indoor fan delayed operation • When the unit starts, the louver is automatically Abbreviation activated and the indoor fan will operate after a period of 7 seconds. Unit element abbreviations • If the unit is in heating mode, the indoor fan is regulated by the anti-cold wind function.

  • Page 17: Display Function

    Display Function Fan Mode Unit display functions When fan mode is activated: • The outdoor fan and compressor are stopped. • Temperature control is disabled and no temperature setting is displayed. • The indoor fan speed can be set to high, med, low, or auto.

  • Page 18: Heating Mode

    stop until T3< TP3-3. When the evaporator temperature exceeds a preset protection value, the compressor stops. 1.5.5 Evaporator Temperature Protection When evaporator temperature drops below a configured Auto-mode value, the compressor and outdoor fan ceases operations. • This mode can be selected with the remote controller. Heating Mode •...

  • Page 19: Sleep Function

    • sleeping mode • For cooling models, the indoor unit will run in low fan mode for a certain time, then ceases operation. • Follow me • For heat pump models, the indoor unit will run in 1.10 Sleep function fan-only mode, then low heat, and finally in fan- only mode.
  • Page 20 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 21 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25  Page 17 ...

  • Page 22: Maintenance And Disassembly

    Maintenance and Disassembly Contents Maintenance ......................19 First Time Installation Check ................19 Refrigerant Recharge ...................21 Re-Installation .....................22 1.3.1 Indoor Unit ..................22 1.3.2 Outdoor Unit ................24 Disassembly ......................26 Indoor Unit ....................26 Outdoor Unit ....................38...

  • Page 23: Maintenance

    1. Maintenance First Time Installation Check To prevent air and moisture from affecting the air Air and moisture trapped in the refrigerant system affects conditioner’s performance, the indoor unit, as well as the the performance of the air conditioner by: pipes between the indoor and outdoor unit, must be be •...
  • Page 24 Procedure: (14.5 Psi) after 50 minutes, check for leakage. Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves • If the pressure successfully reaches -0.1 MPa are closed. (14.5 Psi), fully close the Handle Lo valve, then cease vacuum pump operations.

  • Page 25: Refrigerant Recharge

    Refrigerant Recharge Prior to recharging the refrigerant, confirm the additional amount of refrigerant required using the following table: Models Standard length Max. elevation Max. length Additional refrigerant 9k&12k 7.5m (24.6ft) 10m (32.8ft) 25m (82.0ft) 15g/m (0.16oz/ft) 7.5m (24.6ft) 20m (65.6ft) 30m (98.4ft) 15g/m (0.16oz/ft) 7.5m (24.6ft)

  • Page 26: Re-Installation

    Re-Installation 1.3.1 Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: (14.5 Psi). Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests Connect the charge hose with the push pin of Handle between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi).
  • Page 27 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 28: Outdoor Unit

    1.3.2 Outdoor Unit Evacuation for the whole system Procedure: Wait for five 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 29 Refrigerant charging Procedure: Tighten the flare nuts of the indoor and outdoor and record the starting weight. units, and confirm that both the 2- and 3-way valves Fully open the Handle Lo manifold valve, 2- and are closed. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode and 3-way service port.

  • Page 30: Disassembly

    2. Disassembly Indoor unit Front Panel Procedure Illustration 1) Hold the front panel by the tabs on Front Panel the both sides and lift it (see CJ_AF_ INV_001). CJ_AF_INV_001 2) Push up the bottom of an air filter, and then pull it out downwards (see CJ_AF_INV_002).
  • Page 31 Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AF_INV_003). Horizontal Louver Hook CJ_AF_INV_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AF_INV_004).
  • Page 32 Procedure Illustration 5) Remove 1 screw and then remove the electrical cover(see CJ_AF_INV_005-1 and CJ_AF_INV_005-2). CJ_AF_INV_005-1 CJ_AF_INV_005-2 6) Disconnect the connector for display board(see CJ_AF_INV_005-3) . CJ_AF_INV_005-3 7) Remove the display board(see CJ_AF_ INV_005-4). CJ_AF_INV_005-4 CJ_AF_INV_005 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 33 Procedure Illustration 8) Open the screw caps(2) and the remove the screws(see CJ_AF_ INV_006). 9) Release the 4 hooks. CJ_AF_INV_006 10) Release the seven hooks in the back (see CJ_AF_INV_007). Hooks CJ_AF_INV_007 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 34 Procedure Illustration 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger (see CJ_AF_INV_008). CJ_AF_INV_008 Panel Frame Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 35 Electrical parts Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration 1) Remove the fixing screw and then remove the cover of electronic box and the terminal cover (see CJ_AF_ Electronic Cover INV_009). Fixing Screw CJ_AF_INV_009 2) Pull out the room temperature sensor...
  • Page 36 Procedure Illustration 4) Remove the fixing screw (see CJ_AF_ INV_011-1). 5) Pull out the Electrical control box along the direction indicated in right image to remove it (CJ_AF_INV_011-2). Fixing Screw CJ_AF_INV_011-1 Electronic Box CJ_AF_INV_011-2 Swing Motor Applicable to AC Motor Only Indoor Fan Motor 6) Disconnect the wires.
  • Page 37 Procedure Illustration 7) Remove the fixing screw, then remove the capacitor of fan motor (see CJ_AF_ INV_013). Capacitor of Fan Motor CJ_AF_INV_013 Note: This section is for reference only. Actual unit appearance may vary.  Page 33 ...
  • Page 38 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_AF_INV_014). Pipe Holder CJ_AF_INV_014 2) Remove the screws on the evaporator located at the fixed plate (see CJ_AF_ INV_015).
  • Page 39 Procedure Illustration 4) Pull out the evaporator (see CJ_AF_ Evaporator INV_017). CJ_AF_INV_017 Note: This section is for reference only. Actual unit appearance may vary.  Page 35 ...
  • Page 40 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_AF_ INV_018).
  • Page 41 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_AF_INV_021). Stepping Motor CJ_AF_INV_021 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 42: Outdoor Unit

    Outdoor unit Panel Plate MOBA30-09HDN1-BQ0W; MOBA30-09HDN1-MQ0W; MOBA30-12HDN1-BQ0W; MOBA30-12HDN1- MQ0W: Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_BA30_INV_001). CJ_BA30_INV_001 3) Remove the screws of the top cover and then remove the top cover (3 Top Cover...
  • Page 43 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_BA30_INV_003). Front Panel CJ_BA30_INV_003 5) Remove the screws of the rear net and then remove the rear net (2 screws) (see CJ_BA30_INV_004). CJ_BA30_INV_004 Note: This section is for reference only.
  • Page 44 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_BA30_INV_005). Right Panel CJ_BA30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 40 ...
  • Page 45 MOB30-18HDN1-MQ0W: Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_B30_INV_001). CJ_B30_INV_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 46 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_B30_INV_003). Front Panel CJ_B30_INV_003 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_B30_ INV_004).
  • Page 47 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_B30_INV_005). Right Panel CJ_B30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 43 ...
  • Page 48 MOCA30-23HDN1-MQ0W: Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_CA30_INV_001). CJ_CA30_INV_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 49 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_CA30_INV_003). Front Panel CJ_CA30_INV_003 5) Remove the screws of water collecting Water Collecting Cover cover and then remove the water collecting cover (1 screw) (see CJ_ CA30_INV_004).
  • Page 50 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_CA30_INV_005). Right Panel CJ_CA30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 46 ...
  • Page 51 Fan disassembly Note: Remove the panel plate and (refer to 1. Panel plate) before disassembling fan. MOBA30-09HDN1-BQ0W; MOBA30-09HDN1-MQ0W; MOBA30-12HDN1-BQ0W; MOBA30-12HDN1- MQ0W; MOB30-18HDN1-MQ0W: Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_001 ). 2) Remove the fan. CJ_ODU_INV_001 D-cut 3) Remove the screws of the top cover.
  • Page 52 Procedure Illustration 5) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_004 ). CJ_ODU_INV_004 6) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_005 ). 7) Remove the fan motor. Fan Motor CJ_ODU_INV_005 Note: This section is for reference only.
  • Page 53 MOCA30-23HDN1-MQ0W: Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_006 ). 2) Remove the fan. D-cut CJ_ODU_INV_006 Hook 3) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_INV_007 ). CJ_ODU_INV_007 Note: This section is for reference only.
  • Page 54 Procedure Illustration 4) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_008 ). CJ_ODU_INV_008 5) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_009 ). 6) Remove the fan motor. Fan Motor CJ_ODU_INV_009 Note: This section is for reference only.
  • Page 55 Electrical parts Note: Remove the panel plate and fan assembly (refer to 1. Panel plate and 2. Fan assembly) before disassembling electrical parts. MOBA30-09HDN1-BQ0W; MOBA30-09HDN1-MQ0W; MOBA30-12HDN1-BQ0W; MOBA30-12HDN1- MQ0W; MOB30-18HDN1-MQ0W: Procedure Illustration 1) Remove the connector for the 4-Way Valve compressor (see CJ_ODU_INV_010 ). 2) Pull out the two blue wires connected with the four way valve ( CJ_ODU_ INV_010 ).
  • Page 56 MOCA30-23HDN1-MQ0W: Procedure Illustration 4-Way Valve 1) Remove the connector for the compressor (see CJ_ODU_INV_011 ). Heaters 2) Pull out the two blue wires connected Reactor with the four way valve (see CJ_ODU_ INV_011 ). 3) Pull out connectors of the condenser coil temp.
  • Page 57 Sound blanket WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_INV_012 ).
  • Page 58 Four-way valve WARNING: Recover refrigerant from the refrigerant circuit before remove the four-way valve. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling four-way valve. Procedure Illustration 1) Heat up the brazed parts and then detach...
  • Page 59 Compressor WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling compressor. Procedure Illustration 1) Remove the flange nut of terminal cover and remove the terminal cover (see CJ_ ODU_INV_014 ).
  • Page 60 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_INV_016 ). CJ_ODU_INV_016 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_INV_017 ). 5) Lift the compressor from the base pan Discharge Pipe assembly with pliers.

  • Page 61: Troubleshooting

    Troubleshooting Contents Safety Caution .....................59 General Troubleshooting ..................60 Error Diagnosis and Troubleshooting Without Error Code .......61 Remote maintenance ...................61 Field maintenance ..................62 Quick Maintenance by Error Code ..............63 Troubleshooting by Error Code ................68 Common Check Procedures.................68 E0/F4 (EEPROM parameter error) ..............70 E1 (Indoor and outdoor unit communication error) ........71 E2 (Zero crossing detection error diagnosis and solution) ......73 E3/F5 (Fan speed has been out of control diagnosis and solution) ....74...
  • Page 62 Contents 5.10 P0(IPM malfunction or IGBT over-strong current protection diagnosis and solution) .....................81 5.11 P1(Over voltage or too low voltage protection diagnosis and solution) ..82 5.12 P2(High temperature protection of IPM module diagnosis and solution) ..83 5.13 P4(Inverter compressor drive error diagnosis and solution) ......84...

  • Page 63: Safety Caution

    1. Safety Caution WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. Electrolytic Capacitors For other models, connect discharge resistance (approx.100Ω 40W) or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor.

  • Page 64: 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 lamp...

  • Page 65: Error Diagnosis And Troubleshooting Without Error Code

    3. 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 Page 64-65...

  • Page 66: Field Maintenance

    Field maintenance Problem Solution Unit will not start Page 66-67 Compressor will not start but fans run Page 66-67 Compressor and condenser (outdoor) fan will not start Page 66-67 Evaporator (indoor) fan will not start Page 66-67 Condenser (Outdoor) fan will not start Page 66-67 Unit runs, but shortly stops Page 66-67...

  • Page 67: Quick Maintenance By Error Code

    4. Quick Maintenance by Error Code If you do not have the time to test whether 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 68 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 69 Others ☆ ☆ ☆ ☆ ☆ ☆ ☆  Page 65 ...
  • Page 70 Electrical Circuit 2.Field Maintenance Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...
  • Page 71 Refrigerant Circuit Others ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆...

  • Page 72: Troubleshooting By Error Code

    5. Troubleshooting by Error Code Common Check Procedures 5.1.1 Temperature Sensor Check Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(Tp) sensor.
  • Page 73 5.1.3 IPM Continuity Check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Normal resistance Normal resistance Digital tester Digital tester value value...

  • Page 74: E0/F4 (Eeprom Parameter Error)

    E0/F4 (EEPROM parameter error) 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. Is it still displaying the error The unit is operating normally.

  • Page 75: E1 (Indoor And Outdoor Unit Communication Error)

    E1 (Indoor and outdoor unit communication error) Description: The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times. Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Reactor Troubleshooting and repair: Power off, then restart the unit after 2 minutes.
  • Page 76 Remarks: • Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. • When AC is normal running, the voltage will move alternately between -25V to 25V. •...

  • Page 77: 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 mistake • PCB faulty Troubleshooting and repair: Check the connections and power supply.

  • Page 78: E3/F5 (Fan Speed Has Been Out Of Control Diagnosis And Solution)

    E3/F5(Fan speed is operating outside of the normal range) Description: When the indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure(E3). When the outdoor fan speed registers below 200RPM or over 1500RPM for an extended period of time, the unit will stop and the LED will display the failure(F5).
  • Page 79 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 80 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 81: E4/E5/F1/F2/F3

    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: • Wiring mistake • Faulty sensor •...

  • Page 82: E7 (Indoor Pcb /Display Board Communication Error)

    E7 (Indoor PCB /Display board communication error) Description: Indoor PCB does not receive feedback from Display board for 120 seconds. Recommended parts to prepare: • Wiring mistake • Faulty PCB • Display board malfunction Troubleshooting and repair: Power off, then restart the unit 2 minutes later.

  • Page 83: 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 8 minutes after the compressor starts up, if T2<Tcool-1°C (Tcool-33.8°F) does not keep continuous 4 seconds and compressor running frequency higher than 50Hz does not keep continuous 3 minutes, and this situation happens 3 times, the display area will show “EC”...

  • Page 84: 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: • Power supply problems. • System blockage • Faulty PCB • Wiring mistake • Compressor malfunction Check the power supply.

  • Page 85: Solution)

    5.10 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: •...

  • Page 86: P1(Over Voltage Or Too Low Voltage Protection Diagnosis And Solution)

    5.11 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 issues • System leakage or blockage •...

  • Page 87: P2(High Temperature Protection Of Ipm Module Diagnosis And Solution)

    5.12 P2(High temperature protection of IPM module diagnosis and solution) Description: If the temperature of IPM module is higher than setting value, the LED displays this failure code. Recommended parts to prepare: • Faulty PCB • Connection problems Troubleshooting and repair: Check the fastening screws on the PCB and IPM radiator.

  • Page 88: P4(Inverter Compressor Drive Error Diagnosis And Solution)

    5.13 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: • Wiring mistake •...

  • Page 89: Appendix

    Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..86 Temperature Sensor Resistance Value Table for TP (°C --K) ......87 ∆T(°F)=(9∆T(°C))/5 ....................88 iii) Pressure On Service Port ..................89...

  • Page 90: I) Temperature Sensor Resistance Value Table For T1,T2,T3 And T4 (°C - K)

    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 91: Ii) Temperature Sensor Resistance Value Table For Tp (°C --K)

    ii) Temperature Sensor Resistance Value Table for TP (°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 542.7 68.66...

  • Page 92: T(°F)=(9∆T(°C))/5

    iii) ∆T(°F)=(9∆T(°C))/5 °C °F °C °F °C °F °C °F °C °F 69.8 123.8 179.6 235.4 24.8 71.6 125.6 181.4 237.2 26.6 73.4 127.4 183.2 28.4 75.2 129.2 240.8 30.2 186.8 242.6 25.5 77.9 132.8 188.6 244.4 32.9 78.8 134.6 190.4 246.2 33.8...

  • Page 93: Iv) Pressure On Service Port

    iv) Pressure On Service Port Cooling chart: °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) 70/59 10.1 10.6 75/63 10.7 11.2 80/67 11.2 11.9 90/73 10.5 10.3 10.0 10.6 12.4 13.0 °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89)
  • Page 94 Heating chart: 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) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 32.5 30.0 26.6 25.4 23.3 20.5 19.0 33.8 31.5 27.8 26.3 24.9 21.5 20.0 57/53 47/43 37/33 27/23...

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