Error Code: OL1

    Fault Code: 000D
    Problem: Inverter overload
    Possible Causes:
+ Acceleration time ACC is too short.
+ DC braking amount is too large.
+ V/F setting is not appropriate.
+ A restart signal is given to the rotating motor after a temporary stop, etc.
+ Load is too large.
    Solutions:
+ Increase acceleration time ACC.
+ Reduce DC braking amount F251 and DC braking time F252.
+ Check V/F parameter setting.
+ Use F301 (automatic restart) and F302 (sustain control).
+ Use a larger motor.

Error Code: OL2

    Fault Code: 000E
    Problem: Motor overload
    Possible Causes:
+ V/F setting is not appropriate.
+ Motor is locked.
+ Continuous low-speed operation is being performed.
+ Overload applied while motor is running.
    Solutions:
+ Check V/F parameter setting.
+ Set OL1 to the overload the motor can withstand and run the motor at low speed range.
+ Use a larger motor.

Error Code: OL3

    Fault Code: 003E
    Problem: Main module overload
    Possible Causes:
+ Carrier frequency is high and load current has increased at low speeds (especially 15Hz or less).
    Solutions:
+ Reduce operating frequency.
+ Reduce carrier frequency.
+ When starting a low-speed operation, use the panel operation mode. Set carrier frequency control mode selection F356 to 1.

Error Code: OLr

    Fault Code: 000F
    Problem: Dynamic brake resistor overload trip
    Possible Causes:
+ Deceleration time is too short.
+ Dynamic braking torque is too large.
    Solutions:
+ Increase deceleration time DEC.
+ Increase the capacity and torque of the brake resistor (by using more resistors in parallel, etc.).

Error Code: Ot

    Fault Code: 0020
    Problem: Over torque trip 1
    Possible Causes:
+ Reaches over torque detection level during acceleration.
    Solutions:
+ Enable F615 (over torque detection).

Error Code: Ot2

    Fault Code: 0041
    Problem: Over torque trip 2
    Possible Causes:
+ During power operation, output current reached F601 or more and was sustained in F602.
+ During power operation, torque reached F614 or more and was sustained in F615.
    Solutions:
+ Reduce the load.
+ Increase the stall prevention level or power operation torque level.

Error Code: OtE3

    Fault Code: 0045
    Problem: Over torque / Over current error
    Possible Causes:
+ During power operation, torque or output current reached F593 or more and was sustained in F595.
    Solutions:
+ Enable F591.
+ Reduce the load.
+ Check F591 error.

Error Code: UcE3

    Fault Code: 0049
    Problem: Low torque / Low current error
    Possible Causes:
+ During power operation, torque or output current dropped to F593 or less and was sustained in F595.
    Solutions:
+ Check system error.


Error Code: OH

    Fault Code: 0010
    Problem: Overheating
    Possible Causes:
+ Cooling fan is not spinning.
+ Ambient temperature is too high.
+ Air vent is blocked.
+ A heat-generating device is placed near the inverter.
+ Ambient temperature is too low.
    Solutions:
+ Replace the fan if it does not spin during operation.
+ Reset and restart after the inverter has sufficiently cooled.
+ Provide sufficient space around the inverter.
+ Do not place a heat-generating device near the inverter.
+ Operate at the specified ambient temperature.

Error Code: OH2

    Fault Code: 002E
    Problem: Thermal error stop command from an external device
    Possible Causes:
+ A thermal trip command (input terminal function: TH) is being issued by an external control device.
    Solutions:
+ If the motor is overheating, check if the current entering the motor exceeds the rated current.

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