EF0 Opt External Error
Communication Option Card External Error
An external error condition exists
Check the external condition
Verify parameters
Verify the communication signal

EF3 External Error at S3 Terminal
An external error condition exists connected to the multifunction digital input
Eliminate the cause of the external error condition

EF4 External Error at S4 Terminal

EF5 External Error at S5 Terminal

EF6 External Error at S6 Terminal

EF7 External Error at S7 Terminal
Remove the error from the multifunction digital input

FBL Feedback Loss
PI Feedback Loss
This error occurs when PI Feedback Loss Detection is programmed, and PI Feedback < PI Feedback Loss Detection Level (b5-13) for PI Feedback Loss Detection Time (b5-14)
The PI Feedback source (e.g., converter, sensor, building automation signal) is not properly set up or not working
Verify that the drive is programmed to receive the PI Feedback source signal
Check that the PI Feedback source is properly set up and working correctly

GF Ground Fault
Output Ground Fault
Drive output grounding current exceeded 50% of the Drive nominal output current
Motor cable short-circuited to ground, DCCT faulty
Remove the motor and run the Drive without the motor
Check the motor for phase-to-ground short circuit
Check the output current with a clamp meter to verify the DCCT reading

LF Output Phase Loss
An open-phase occurred at the drive output
This error is detected when the output current exceeds a 5% imbalance
There is a broken wire in the output cable
There is a broken wire in the motor winding
Output terminals were loose
Check the connection to the motor cable
Check the motor for phase-to-ground short circuit
The capacity of the motor used is less than 5% of the Drive's maximum motor capacity
Check the motor and Drive capacity
A low impedance motor was used. Add additional impedance
Parameter E2-03 is set incorrectly. Set E2-03 to a lower value

LL3 Load Loss Detection 1
Drive output current < L6-02, for longer than L6-03
The motor is underloaded
Ensure the values in L6-02 and L6-03 are appropriate
Review the application/machine condition.

OC Over Current
Drive output current exceeded the overcurrent detection level (approximately 180% of the Drive nominal output current)
Drive output phase short-circuited, motor short-circuited, locked rotor, overly heavy load, acceleration/deceleration time too short, contactor at Drive output opening and closing, special motor or a motor whose FLA rating is larger than the Drive nominal output current
Remove the motor and run the Drive without the motor
Check the motor for phase-to-phase short circuit
Check the Drive for phase-to-phase short circuit at the output
Verify that C1-01 and C1-02 are set correctly
Check the load conditions

OH1 Cooling Fin/Cooling Fin Fan Overheating
The temperature of the Drive cooling fin exceeded the temperature programmed in parameter L8-02
Cooling fans not working, high ambient temperature, a heat source too close to the Drive
Check for dirt accumulation in fans and cooling fins
Reduce the ambient temperature around the Drive
Remove the heating unit

OH3 Motor Overheating Alarm
The Drive stops or continues operation according to the setting of L1-03
Overheating of the motor measured by the motor thermistor
Recheck the operating time and load size
Recheck the acceleration/deceleration time (C1-01 and C1-02)
Recheck the V/F pattern (E1-01 - E1-13)
Recheck the motor nominal current value (E2-01)

OH4 Motor Overheating Fault
The Drive stops the operation according to the setting of L1-04
Overheating of the motor measured by the motor thermistor
Recheck the operating time and load size
Recheck the acceleration/deceleration time (C1-01 and C1-02)
Recheck the V/F pattern (E1-01 - E1-13)
Recheck the motor nominal current value (E2-01)

OL1 Motor Overloaded
Designed to protect the motor
Fully adjustable from parameter E2-01
The load is too large. Cycle time too short in acceleration/deceleration time
Recheck the operating time and load size (along with the times set in C1-01 and C1-02)
The voltage of the V/F pattern is high
Review the V/F pattern parameters (E1-01 - E1-13)
The motor nominal current setting is not appropriate
Check the motor nominal current value in E2-01

OL2 Drive Overloaded
Designed to protect the Drive
The load is too large. Cycle time too short in acceleration/deceleration time
Recheck the operating time and load size (along with the times set in C1-01 and C1-02)
The voltage of the V/F pattern is high
Review the V/F pattern parameters (E1-01 - E1-13)
The size of the Drive is small
Switch to a Drive of a larger size

OL3 Over Torque Detection 1
Drive output current > L6-02, for longer than L6-03
The motor is overloaded
Ensure the values in L6-02 and L6-03 are appropriate
Check the application/machine condition and eliminate the error