OL1 13 (0x000D) - Overload (Inverter)
+ Causes:
- Sudden acceleration with short acceleration time.
- <Pt: V/f Pattern> mismatch with machinery.
- Attempted restart after a momentary power failure with a rotating motor.
- Large DC braking amount.
- Load exceeds inverter capacity.
+ Advice:
- Increase the acceleration time using <ACC: Acceleration time 1>.
- Set <Pt: V/f Pattern> according to the machinery.
- Configure <F301: Auto-restart> and <F302: Regenerative power ride-through> = "1" if needed.
- Reduce <F251: DC braking current> and <F252: DC braking time>.
- Consider a larger capacity inverter.

    OL2 14 (0x000E) - Overload (Motor)
+ Causes:
- Motor is locked up.
- Operation continues in the low-speed range.
- Motor is overloaded.
- Mismatch in electronic thermal settings with motor characteristics.
- <Pt: V/f Pattern> mismatch with machinery.
+ Advice:
- Check the machinery for issues.
- Set the electronic thermal according to the motor using <OLM: Motor overload protection characteristic> and <tHrA: Motor overload protection current 1>.
- Set <Pt: V/f Pattern> according to the machinery.

    OL3 62 (0x003E) - Overload (IGBT)
+ Causes:
- Overload occurred while operating at low speed (15 Hz or less) with a high carrier frequency.
- Momentary power failure occurred, and attempted restart of a rotating motor.
+ Advice:
- Reduce the load.
- Lower <F300: Carrier frequency> or set <F316: Carrier frequency control> to "Valid decrease."
- Increase the output frequency.
- Reduce <F601: Stall prevention level 1> or <F185: Stall prevention level 2>.
- Configure <F301: Auto-restart>. Depending on the machinery's characteristics, setting <F302: Regenerative power ride-through> to "1" may also be effective.

    OLr 15 (0x000F) - Overload (Braking Resistor)
+ Causes:
- Large braking rate.
- Short deceleration time.
+ Advice:
- Increase the deceleration time using <dEC: Deceleration time 1>.
- Upgrade to a larger capacity braking resistor and adjust <F309: Braking resistor capacity> accordingly.

    OP1 10 (0x000A) - Overvoltage (During Acceleration)
+ Causes:
- High input voltage with abnormal fluctuations.
- System configuration with high power supply capacity or connected equipment using thyristors.
- Momentary power failure occurred, and attempted restart of a rotating motor.
+ Advice:
- Operate within the power supply voltage range. If input voltage is stable, consider installing an input AC reactor (optional).
- Configure <F301: Auto-restart> and consider setting <F302: Regenerative power ride-through> to "1" depending on the machinery.

    OP2 11 (0x000B) - Overvoltage (During Deceleration)
+ Causes:
- Short deceleration time with large regenerative energy.
- <F305: Overvoltage limit operation> set to "1: Disabled."
- High input voltage with abnormal fluctuations.
- System configuration with high power supply capacity or connected equipment using thyristors.
+ Advice:
- Increase deceleration time using <dEC: Deceleration time 1>. Install a braking resistor if regenerative energy is large.
- Enable Overvoltage limit operation by setting <F305> to "0", "2", or "3". Install a braking resistor if deceleration time is limited.
- Operate within the power supply voltage range. Install an input AC reactor (optional) if input voltage is stable.

    OP3 12 (0x000C) - Overvoltage (During Constant Speed Running)
+ Causes:
- High input voltage with abnormal fluctuations.
- System configuration with high power supply capacity or connected equipment using thyristors.
- Power supply system grounded at a point other than the neutral point (e.g., delta connection with single-phase grounding).
- Motor rotated due to load-side force, causing a regenerative status.
+ Advice:
- Operate within the power supply voltage range. Install an input AC reactor (optional) if input voltage is stable.
- Disconnect grounding capacitor as needed (refer to section [2.3.4]).
- Install a braking resistor (optional) for better control.

    Ot 32 (0x0020) - Overtorque
+ Cause: The load torque reached the overtorque level during operation.
+ Advice:
- Inspect the load side for any issues.
- Ensure the overtorque detection settings are correct using <F615: Overtorque trip>, <F616: Overtorque detection level during power running>, <F617: Overtorque detection level during regen>, and <F618: Overtorque detection time>.

    Ot2 65 (0x0041) - Overtorque 2
+ Causes:
- Output current during power running exceeded <F601: Stall prevention level 1>, and <F452: Stall detection time during power running> elapsed.
- Power running torque during power running exceeded <F441: Power running torque limit level 1>, and <F452: Stall detection time during power running> elapsed.
+ Advice:
- Reduce the load to avoid overtorque.
- Lower the detection levels of <F601> or <F441>.

    OtC3 72 (0x0048) - Overtorque/Overcurrent
+ Cause: Overtorque or overcurrent was detected by the shock monitoring function.
+ Advice:
- Inspect the load for irregularities.
- If no issues are found, verify that the shock monitoring function settings are correct, using parameters from <F590: Shock monitoring> to <F598: Shock monitoring detection condition>.