PLEASE SELECT THE ERROR CODE BELOW

Instructions

Tap the error code below to begin the troubleshooting process.

If you are not able to resolve your issue or if you find an error in this troubleshooting process, please click here to contact us.

E0/F4 - EEPROM parameter error diagnosis and solution

  • Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code?
    • Yes
      If the EEPROM chip is welded on main PCB, replace the main PCB directly. Otherwise, check whether the EEPROM chip plugged in main PCB well?
      • No

        Correct the connection.

      • Yes

        Replace the main PCB.

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E1 - Indoor / outdoor unit’s communication diagnosis and solution

  • Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes?
    • Yes
      Measure Vs, is it moving alternately with positive value? (Vs is the voltage between L2 and S of outdoor unit. Connect the red pin of multimeter with L2 port, black pin with S port)
      • Yes
        Check all the wiring with outdoor u n i t s . Is the wiring to the outdoor main PCB connected correctly? Is the reactor connected well?
        • Yes
          Measure the resistance of the reactor(The one without capacitor). If it is zero ,follow the below step. If not, replace a new reactor.
          • Yes
            Replace the outdoor main PCB.
            • Yes
              Power on. Is the error extinguished?
              • No

                Replace the indoor main PCB.

      • No
        Check all the wiring with indoor units. Is the wiring to the indoor main PCB connected correctly?
        • Yes
          Replace the indoor main PCB.
          • Yes
            Power on. Is the error extinguished?
            • No

              Replace the outdoor main PCB.

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E2 - Zero crossing detection error diagnosis and solution

  • Check if the connections and power supply is normal?
    • No

      Correct the connections. Turn on the unit when the power supply is good.

    • Yes

      Indoor main PCB is defective. Replace indoor main PCB.

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E3 - Fan speed has been out of control diagnosis and solution

  • Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code?
    • No

      The unit operates normally.

    • Yes
      Shut off the power supply, rotate the fan by hand. Does it rotate properly?
      • No

        Find out the cause and have it solved. For example, check whether the fan is blocked or the bearing is broken?

      • Yes
        Check the wires of fan motor. Are all the connections good?
        • No

          Correct the connections.

        • Yes
          Check whether the fan motor is normal through index 1?
          • No
            Replace the fan motor
            • Yes

              If the malfunction is still existing, replace the main PCB

          • Yes
            Check whether the main PCB is normal through index 2?
            • Yes
              Replace the fan motor
              • Yes

                If the malfunction is still existing, replace the main PCB

            • No
              Replace the main PCB. The malfunction is solved?
              • No
                Replace the fan motor
                • Yes

                  If the malfunction is still existing, replace the main PCB

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E5 - Open circuit or short circuit of temperature sensor diagnosis and solution

  • Check the connections between temperature sensor and main PCB. Are the connections good?
    • No

      Correct the connections.

    • Yes
      Check the resistance value of the sensor via table1(p64)and table 2(p65), is it normal?
      • Yes

        Replace indoor or outdoor main PCB.

      • No

        Replace the sensor and check if the problem happen again?

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EC - Refrigerant Leakage Detection diagnosis and solution

  •  
    Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code?
    • Yes
      Is there cool air blowing out from indoor air outlet?
      • Yes
        Check if T2 sensor is well fixed. Correct the installation or replace T2 sensor. Does the problem remain again?
        • Yes

          Replace indoor PCB.

      • No
        Is there any leakage? Especially the connection parts, such as the gas valve and the liquid valve.
        • Yes

          Repair the leakage and recharge the refrigerant.

        • No
          Is there any block i n g ? (Such as the capillary or the welded points of the pipes.)
          • Yes

            Clear the blocking.

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P0 - IPM malfunction or IGBT over-strong current protection diagnosis and solution

  •  
    Check if the wiring between main PCB and compressor connected by error and if the wires and connectors are broken?
    • Yes

      Correct the connection or replace the wires and connectors.

    • No
      IPM continuity check. Check if the IPM terminal resistance values are uniform. Refer to page 64.
      • No

        Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together.

      • Yes
        Check if the outdoor fan runs properly or the outdoor unit ventilation is good.
        • No

          please refer to the below remark, check whether the resistance of the fan motor is normal. If not, replace the fan motor.

        • Yes
          Check if the compressor resistance values are uniform .Refer to page 63.
          • No

            Replace the compressor.

          • Yes

            Replace the outdoor main PCB if the main PCB and IPM are separate.

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P1 - Over voltage or too low voltage protection diagnosis and solution

  •  
    Check if the power supply is normal.
    • No

      Disconnect the unit with power supply and try to restart the unit when power supply gets normal.

    • Yes
      Check if all the connections and wires are good?
      • No

        Correct the connections or replace the wires.

      • Yes
        Power on and when the unit is in standby, check if the voltage between P and N is around DC 310V or 340V or 380V? For different kinds of units, the voltage differs. Consult with technical engineer to get definite value. Then start up the unit, measure the voltage between P and N. Is it in 220V~400V?
        • No

          Replace the IPM board if it is separate with main PCB.

        • Yes

          Replace outdoor main PCB.

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P2 - High temperature protection of compressor top diagnosis and solution

  •  
    Check if the air flow system of indoor and outdoor units are obstructed?
    • Yes

      Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units.

    • No
      Turn off the power supply and turn it on 10 minutes later.
      • Yes
        Check if the unit can start normally.
        • Yes
          Check if the refrigerant charge volume is normal?
          • Yes

            Refrigerant system is blocked, such as capillary or welded point of pipes.

          • No

            Recharge the correct refrigerant volume.

        • No
          Check if all the connection, especially the connection of OLP (Over Load Protector) sensor is good.
          • No

            Correct the connection.

          • Yes
            Measure the resistance between the two ports of the OLP. Is it zero?
            • No

              Replace the OLP.

            • Yes

              Replace the outdoor control PCB.

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P4 - Inverter compressor drive error diagnosis and solution

  •  
    Check if the wiring between main PCB and compressor connected by error and if the wires and connectors are broken?
    • Yes

      Correct the connection or replace the wires and connectors.

    • No
      IPM continuity check. Check if the IPM terminal resistance values are uniform. Refer to page 64.
      • No

        Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together.

      • Yes
        Check if the outdoor fan runs properly or the outdoor unit ventilation is good.
        • No

          please refer to the below remark, check whether the resistance of the fan motor is normal. If not, replace the fan motor.

        • Yes
          Check if the compressor resistance values are uniform .Refer to page 63.
          • No

            Replace the compressor.

          • Yes

            Replace the outdoor main PCB if the main PCB and IPM are separate.

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