Is the EEPROM Chip welded on the PC Board?

• Yes

  Replace the PC Board

• No

  Is the EEPROM Chip firmly placed on the PC Board?

  • Yes

    Replace the indoor PC Board

  • No

    Correct the connection of the Chip to the Board. Did this fix your issue?

    • Yes

      Problem Solved

    • No

      Please Contact Support

Is the unit working now?

• Yes

  Problem Solved

• No

  Please Contact Support

Are the wires connected as the diagram displays?

• Yes

  Is the voltage alternating between positive and negative values?

  • Yes

    Is the wiring to the outdoor PB Board connected correctly?

    • Yes

      Replace outdoor Main PC board

    • No

      Connect the wires correctly. Is your unit working now?

      • Yes

        Problem Solved

      • No

        Go Back To Previous Step

  • No

    Is the wiring to the indoor PC Board connected correctly?

    • Yes

      Replace the indoor PC Board

    • No

      Connect the wires correctly. Is your unit working now?

      • Yes

        Problem Solved

      • No

        Replace outdoor main PC Board

• No

  Connect the wires according to the diagram. Is the unit working now?

  • Yes

    Problem Solved

  • No

    Go Back To Previous Step

Is your unit working now?

• Yes

  Problem Solved

• No

  Please contact Support

Your PC Board is defective. Replace your indoor PC Board

Correct the connections. Is your unit working now?

• Yes

  Problem Solved

• No

  Go Back a Step

Problem Solved

Shut off the power supply then manually rotate the fan. Does it rotate properly?

• Yes

  Check all of the fan motor wires. Do all of the connections look good?

  • Yes

    Do the resistance values of the indoor fan motor look normal?

    • Yes

      Replace Indoor PC Board

    • No

      Replace Indoor Fan Motor

  • No

    Correct the connections. Is your unit working now?

    • Yes

      Problem Solved

    • No

      Contact Support

• No

  Disassemble the connection between the fan and motor. Are the bearings moving smootly?

  • Yes

    Replace the indoor fan motor

  • No

    Replace the bearings

Are the resistance values between Table 1 & Table 2 appear normal?

• Yes

  Replace Indoor or Outdoor PC Board

• No

  Replace the sensor

Correct the connections. Is it working now?

• Yes

  Problem Solved

• No

  Go back a Step

Are the IPM terminal resistance values uniform?

• Yes

  Is the IPM Installed correctly?

  • Yes

    Is the outdoor fan running properly?

    • Yes

      Replace the outdoor control PC Board. Is the unit working now?

      • Yes

        Problem Solved

      • No

        Replace the Compressor

    • No

      Are the fan motors connected properly?

      • Yes

        Replace the fan motor

      • No

        Correct the connections. Is it working now?

        • Yes

          Problem Solved

        • No

          Replace the fan motor

  • No

    Correct the installation, tighten the screws and apply silicon grease. Is the unit working now?

    • Yes

      Problem Solved

    • No

      Go back 2 steps

• No

  Replace the module PC Board

Correct the connections. Is the unit working now?

• Yes

  Problem Solved

• No

  Go back 2 steps

Are the IPM terminal resistance values uniform?

• Yes

  Is the IPM installed correctly?

  • Yes

    Is the outdoor fan installed properly?

    • Yes

      Replace the PC board. Is the unit working now?

      • Yes

        Problem Solved

      • No

        Replace the compressor

    • No

      Connect the fan motor properly. Is the fan working now?

      • Yes

        Go back 2 steps

      • No

        Replace fan motor

  • No

    Correct the the installation, tighten the screws and apply silicon grease. Is your unit working now?

    • Yes

      Problem Solved

    • No

      Go back 2 steps

• No

  Replace the module PC Board

Connect the cables correctly. Is your unit working now?

• Yes

  Problem Solved

• No

  Go back 2 steps

Is the voltage between P and N around DC 320V?

• Yes

  Replace the outdoor unit

• No

  Correct the voltage to be between 320V. Is the unit working now?

  • Yes

    Problem Solved

  • No

    Replace the outdoor control PC Board

Correct the connections. Is your unit working now?

• Yes

  Problem Solved

• No

  Go back 2 steps

Clear up the air inlet and outlet and/or the heat exchanger of the indoor and outdoor units. Restart unit. Is the unit working now?

• Yes

  Problem Solved

• No

  Go back 2 steps

Turn off the power supply and turn it back on after 10 minutes. Is the unit starting normally?

• Yes

  Is the Refrigerant charge volume normal?

  • Yes

    Unblock the refrigerant system such as the capillary or welded point of pipes

  • No

    Recharge the the refrigerant volume

• No

  Check all connections including the OLP (Over Load Protector). Is everything connected correctly?

  • Yes

    Measure the resistance between the 2 ports of the OLP. Is it at zero?

    • Yes

      Replace the outdoor control PC Board

    • No

      Replace the OLP (Over Load Protector)

  • No

    Connect the connections. Is your unit working now?

    • Yes

      Problem Solved

    • No

      Go back 2 steps

Are the IPM terminal resistance values uniform?

• Yes

  Replace the outdoor control PC Board. Is the system still displaying the error message?

  • Yes

    Replace the compressor

  • No

    Problem Solved

• No

  Replace outdoor module PC Board

Connect the connections. Is the unit still displaying the error?

• Yes

  Go back 2 steps

• No

  Problem Solved