Mitsubishi FREQROL-E700 Manual page 97

Function name
Overcurrent Overcurrent has occurred
trip during during acceleration.
acceleration
Major
Overcurrent Overcurrent has occurred
fault
trip during during constant speed
constant operation.
speed
Overcurrent Overcurrent has occurred
trip during during deceleration or at a
deceleration stop.
or stop
Regenerative Overvoltage has occurred
overvoltage during acceleration.
trip during
acceleration
Description
• Set the acceleration time longer. (Shorten the
downward acceleration time in vertical lift application.)
• If "E.OC1" always appears at start, disconnect the
motor once and restart the inverter. If "E.OC1" still
appears, the inverter may be faulty. Contact your sales
representative.
• Check the wiring for output short circuit and ground fault.
• When the rated motor frequency is 50Hz, set the Pr. 3
Base frequency to 50Hz.
• Lower the stall prevention operation level.
• Activate the stall prevention operation and the fast-
response current limit operation. (Pr.156)
• For the operation with frequent regenerative driving,
set the base voltage (rated motor voltage, etc.) in Pr.
19 Base frequency voltage.
• If the motor is coasting, stop the motor, then input a
start command. Alternatively, use the automatic restart
after instantaneous power failure/flying start function.
• Keep the load stable.
• Check the wiring to avoid output short circuit or ground
fault.
• Lower the stall prevention operation level.
• Activate the stall prevention operation and the fast-
response current limit operation. (Pr.156)
• Set the deceleration time longer.
• Check the wiring to avoid output short circuit or ground
fault.
• Check if the mechanical brake is set to be activated
too early.
• Lower the stall prevention operation level.
• Activate the stall prevention operation and the fast-
response current limit operation. (Pr.156)
• Set the acceleration time shorter.
• Use the regeneration avoidance function (Pr. 882, Pr.
883, Pr.885, Pr.886).
• Set the Pr. 22 Stall prevention operation level correctly.
App.2-3
Corrective action Display