Omron 3G3JV Manual page 28

Protective and Diagnostic Functions
Fault display Fault name and meaning
Motor overload (OL1)
The electric thermal relay actuated the
motor overload protective function.
Inverter overload (OL2)
The electronic thermal relay has
actuated the Inverter overload
protective function.
Overtorque detection (OL3)
There has been a current or torque the
same as or greater than the setting in
n60 for overtorque detection level and
that in n61 for overtorque detection
time. A fault has been detected with
n59 for overtorque detection function
selection set to 2 or 4.
Ground fault (GF)
The ground fault current at the output
of the Inverter has exceeded the rated
output current of the Inverter.
j External fault j (EFj)
An external fault has been input from a
multi-function input.
A multi-function input 1, 2, 3, or 4 set to
3 or 4 has operated. The EF number
indicates the number of the
corresponding input (S2 to S5).
Digital Operator transmission fault 1
(F00)
An initial memory fault has been
detected
Digital Operator transmission fault 2
(F01)
A ROM fault has been detected.
Initial memory fault (F04)
An error in the built-in EEPROM of the
Inverter has been detected.
Analog-to-digital converter fault
(F05)
An analog-to-digital converter fault has
been detected.
Digital Operator fault (F07)
An error in the built-in control circuit of
the Digital Operator has been detected.
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• The load is excessive.
→
Reduce the load.
→
Decrease the Inverter capacity.
• The V/f setting is incorrect.
→
Reduce the V/f set voltage.
• The value in n11 for maximum voltage frequency is low.
→
Check the motor nameplate and set n11 to the rated frequency.
• The acceleration/deceleration time is too short.
→
Increase the acceleration/deceleration time.
• The value in n32 for rated motor current is incorrect.
→
Check the motor nameplate and set n32 to the rated current.
• The Inverter is driving more than one motor.
→
Disable the motor overload detection function and install an electronic thermal relay for each of
the motors.
The motor overload detection function is disabled by setting n32 to 0.0 or n33 to 2.
• The motor protective time setting in n34 is short.
→
Set n34 to 8 (the default value).
• The load is excessive.
→
Reduce the load.
• The V/f setting is incorrect.
→
Reduce the V/f set voltage.
• The acceleration/deceleration time is too short.
→
Increase the acceleration/deceleration time.
• The Inverter capacity is insufficient.
→
Use an Inverter model with a higher capacity.
• The mechanical system is locked or has a failure.
→
Check the mechanical system and correct the cause of overtorque.
• The parameter settings were incorrect.
→
Adjust the n60 and n61 parameters according to the mechanical system.
Increase the set values in n60 and n61.
• A ground fault has occurred at the Inverter output.
→
Check the connections between the Inverter and motor and reset the fault after correcting its
cause.
• An external fault was input from a multi-function input.
→
Remove the cause of the external fault.
• The sequence is incorrect.
→
Check and change the external fault input sequence including the input timing and NO or NC
contact.
• The internal circuitry of the Inverter has a fault.
→
Turn the Inverter off and on.
→
Replace the Inverter if the same fault occurs again.
• The internal circuitry of the Inverter has a fault.
→
Turn the Inverter off and on.
→
Replace the Inverter if the same fault occurs again.
• The internal circuitry of the Inverter has a fault.
→
Initialize the Inverter with n01 set to 8 or 9 and turn the Inverter off and on.
→
Replace the Inverter if the same fault occurs again.
• The internal circuitry of the Inverter has a fault.
→
Turn the Inverter off and on.
→
Replace the Inverter if the same fault occurs again.
• The internal circuitry of the Digital Operator has a fault.
→
Turn the Digital Operator off and on.
→
Replace the Digital Operator if the same fault occurs again.
Probable cause and remedy