Toshiba TOSVERT VF-AS3 Instruction Manual page 575

Trip Failure
Trip name
display code
OC1 0001 Overcurrent
(during
acceleration)
OC2 0002 Overcurrent
(during
deceleration)
OC3 0003 Overcurrent
(during
constant
speed
running)
OCA1 0005 Overcurrent
(U-phase
arm)
OCA2 0006 Overcurrent
(V-phase arm)
OCA3 0007 Overcurrent
(W-phase
arm)
OCL 0004 Overcurrent
(load side at
startup)
OCr 0024 Overcurrent
(Braking
resistor)
*Enable/Disable can be selected for trip with a parameter.
Detection factor
1) The acceleration time is short.
2) <Pt: V/f Pattern> does not match the
machinery.
3) Momentary power failure occurred, and
tried to start the rotating motor.
4) Tried to run the special motor
(impedance small).
5) Tried to run a low inductance motor like
a high-speed motor.
6) When <Pt> = "11", polarity of PG is
opposite.
7) When <F614: Pulse width of short
circuit detection at start> = "0", inverter
output short circuit.
1) The deceleration time is short.
2) Tried to run a low inductance motor like
a high-speed motor.
3) When <Pt> = "11", polarity of PG is
opposite.
4) When <F614: Pulse width of short
circuit detection at start> = "0", inverter
output short circuit.
1) The load changed rapidly.
2) Error occurred in the machinery
(something got stuck, etc.).
3) Tried to run a low inductance motor like
a high-speed motor.
4) When <Pt> = "11", polarity of PG is
opposite.
5) When <F614: Pulse width of short
circuit detection at start> = "0", inverter
output short circuit.
Fault on IGBT in U-phase.
Fault on IGBT in V-phase.
Fault on IGBT in W-phase.
1) Short circuit occurred on the output
side.
2) The motor and output side wiring have
defective insulation.
3) Impedance on the motor is low.
1) When "Enabled" is set in <F304:
Dynamic braking, OLr trip>:
• The braking resistor is not connected.
• The braking resistor connection is
disconnected.
• A braking resistor with a resistance
value under the minimum allowable
resistance value is connected.
2) Short circuit occurred between [PB] and
[PC/-].
3) IGBT fault on the dynamic braking drive
circuit control.
13-5
E6582062
Measures
1) Increase the acceleration time. <ACC:
Acceleration time 1>, etc.
2) Set <Pt: V/f Pattern> according to the
machinery.
3) Set <F301: Auto-restart>. Depending
on the characteristic of machinery,
<F302: Regenerative power ride-
through> = "1" is also effective.
4) When <Pt> is set to "0", "1", "2", or "7",
lower <vb: Manual torque boost 1>.
For settings other than "0", "1", "2", or
"7", perform auto-tuning with <F400:
Offline auto-tuning>. <F402: Automatic
torque boost> is set matching the
motor.
5) Change the inverter to large capacity.
1) Increase the deceleration time. <dEC:
Deceleration time 1>, etc.
2) Change the inverter to large capacity.
1) Suppress load fluctuation.
2) Check whether a problem exists in the
machinery.
3) Change the inverter to large capacity.
Fault in internal inverter.
Contact your Toshiba distributor.
Fault in internal inverter.
Contact your Toshiba distributor.
Fault in internal inverter.
Contact your Toshiba distributor.
1) Check the wiring on the output side.
2) Check the insulation on the output side.
3) Set <F613: Short circuit detection at
start> to "2" or "3".
1) Check if an adequate braking resistor is
connected. When a braking resistor is
not necessary, set "Disabled" in
<F304>.
2) Check for problems on impedance of
the braking resistor, wiring, etc.
3) Fault in internal inverter.
Contact your Toshiba distributor.
13. Trip information and measures
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