bUS – Option Communications Error
    Condition: A communication error was detected during a run command or while setting a frequency reference.
    Solution: Check the communication devices and signals.

    LPF00 – Digital Operator Communications Error 1
    Condition: Communication with the Digital Operator was not established within 5 seconds after the power was turned on.
    Solution:
- Disconnect and reconnect the Digital Operator.
- If the error persists, replace the inverter.

    LPF00 – CPU External RAM Fault
    Condition: The control circuits are damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF01 – Digital Operator Communications Error 2
    Condition: Communication with the Digital Operator failed for more than 2 seconds after being established.
    Solution:
- Disconnect and reconnect the Digital Operator.
- If the error persists, replace the inverter.

    LPF02 – Baseblock Circuit Error
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF03 – EEPROM Error
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF04 – CPU Internal A/D Converter Error
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF05 – CPU Internal A/D Converter Error
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF06 – Option Card Connection Error
    Condition: The Option Card is not properly connected.
    Solution:
- Turn off the power and reinsert the card.
- If the inverter or Option Card is faulty, replacement may be necessary.

    LPF07 – ASIC Internal RAM Fault
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF08 – Watchdog Timer Fault
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF09 – CPU-ASIC Mutual Diagnosis Fault
    Condition: The control circuit is damaged.
    Solution:
- Try turning the power supply off and on again.
- If the error persists, replace the inverter.

    LPF10 – ASIC Version Fault
    Condition: The Inverter control circuit is faulty.
    Solution: Replace the inverter.

    LPF20 – Communications Option Card A/D Converter Error
    Condition: The Option Card is not properly connected, or the A/D converter is faulty.
    Solution:
- Turn off the power and reinsert the card.
- Replace the Communications Option Card.

    LPF21 – Communications Option Card Self Diagnostic Error
    Solution: Replace the Option Card.

    LPF22 – Communications Option Card Model Code Error
    Solution: Replace the Option Card.

    LPF23 – Communications Option Card DPRAM Error
    Solution: Replace the Option Card.