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.

Indoor fan speed 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 cross fan by hand. Does it rotate properly
      • No
        Disassembly the connection between fan and motor, Check if the bearing is normal
        • No

          Replace Bearing

        • Yes

          Replace indoor fan motor

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

          Correct the Corrections

        • Yes
          Check the resistance value of indoor fan motor, is it normal?
          • Yes

            Replace indoor PCB

          • No

            Replace Indoor Fan motor

Open or short circuit of temperature sensor diagnosis and solution

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

      Correct the Corrections

    • Yes
      Replace the sensor and check if the problem happen again?
      • Yes

        Replace indoor or outdoor PCB

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
      Is the EEPROM chip plugged in PCB well?
      • No

        Correct the corrctions

      • Yes

        Replace the indoor PCB

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 PCB is defective. Replace indoor PCB

Indoor / outdoor unit’s communication error 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
      Check all the wirings between indoor and outdoor, indoor PCB and outdoor PCB following the wiring diagram. Are all the wirings connected correctly?
      • Yes
        “Is -24V Vs grater than+24V?” (Vs is the voltage between S and N of outdoor unit.)
        • Yes
          Is the wiring to the outdoor PCB connected correctly?
          • Yes
            Change the outdoor Main PCB
            • Yes
              Power on. Is the error extinguished?
              • No

                Change the outdoor main PCB.

        • No
          Is the wiring to the indoor PCB connected correctly?
          • Yes
            Change the indoor PCB.
            • Yes
              Power on. Is the error extinguished?
              • No

                Change the outdoor main PCB.

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
        • No
          Is there any blocking? ( such as the capillary or the welded points of pipes)
          • Yes

            Clear the blocking

        • Yes

          Repair the leakage and recharge the refrigerant