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List of fault displays
7
Fault
Overcurrent trip during
acceleration
Overcurrent has occurred during acceleration.
ySet the acceleration time longer. (Shorten the downward
acceleration time in vertical lift application.)
yIf "E.OC1" always appears at start, disconnect the motor
once and restart the drive unit. If "E.OC1" still appears, the
drive unit may be faulty. Contact your sales representative.
yCheck the wiring for output short circuit and ground fault.
yChange the setting to enable the stall prevention operation.
(Pr.156)
yLower the stall prevention operation level.
yChoose drive unit and motor capacities that match.
yIf the motor is coasting, stop the motor, then input a start
command.
Overcurrent trip during
constant speed
Overcurrent has occurred during constant speed
operation.
yKeep the load stable
yCheck the wiring to avoid output short circuit or ground fault.
yChange the setting to enable the stall prevention operation.
(Pr.156)
yLower the stall prevention operation level.
yChoose drive unit and motor capacities that match.
yIf the motor is coasting, stop the motor, then input a start
command.
Overcurrent trip during
deceleration or stop
Overcurrent has occurred during deceleration or
at a stop.
ySet the deceleration time longer.
yCheck the wiring to avoid output short circuit or ground fault.
yCheck if the mechanical brake is set to be activated too early.
yChange the setting to enable the stall prevention operation.
(Pr.156)
yLower the stall prevention operation level.
yChoose drive unit and motor capacities that match.
yIf the motor is coasting, stop the motor, then input a start
command.
Regenerative
overvoltage trip during
acceleration
Overvoltage has occurred during acceleration.
ySet the acceleration time shorter.
yUse the regeneration avoidance function (Pr. 882, Pr. 883, Pr.
885, Pr. 886).
ySet the Pr. 22 Stall prevention operation level correctly.
Regenerative
overvoltage trip during
constant speed
Overvoltage has occurred during constant speed
operation.
yKeep the load stable
yUse the regeneration avoidance function (Pr. 882, Pr. 883, Pr.
885, Pr. 886).
yUse the brake resistor, brake unit or power regeneration
common converter (FR-CV) as required.
ySet the Pr. 22 Stall prevention operation level correctly.
Regenerative
overvoltage trip during
deceleration or stop
Overvoltage has occurred during deceleration or
at a stop.
ySet the deceleration time longer. (Set the deceleration time
which matches the moment of inertia of the load.)
yMake the brake cycle longer.
yUse the regeneration avoidance function (Pr. 882, Pr. 883, Pr.
885, Pr. 886).
yUse the brake resistor, brake unit or power regeneration
common converter (FR-CV) as required.
Function Name Description Countermeasure Display