130
is too low.
5. V/F curve is not
suitable.
capacity.
5.Reset V/F curve or torque
boost value.
OC2
Over-current
when
deceleration
Dec time is too Short.
1.
2.Load potential energy or
inertia is too large.
3.The power of the inverter
is too low.
1.Prolong Dec time.
2.Connect external braking
resistance or braking unit.
3.Select inverter with right
capacity.
OC3
Over-current
when constant
speed running
1.The load transients or
is abnormal.
2.The voltage of the grid
is too low.
3.The power of the inverter
is too low.
1. Check load’s changing and
eliminate it.
2.Check input power.
3.Select inverter with right
capacity
OU1
Over-voltage
when
acceleration
1. Input voltage is too high.
2. While power is off,
restart motor which is
running .
1.Check input power.
2.Avoid restart-up after stopping.
OU2
Over-voltage
when
deceleration
1 .Dec time is too short.
2.The inertia of the load is
big.
3.The input voltage is
abnormal.
1.Increase the Dec time.
2.Increase the energy-consuming
components.
3. Check the input power.
OU3
Over-voltage
when speed
constant
running
1 .The input voltage
changes abnormally.
2. The inertia of the load is
big.
1 .Install the input reactor.
2.Add proper energy-consuming
components.
UU
DC bus Under-
voltage
1.The voltage of the grid is
low.
2.Momentary interruption.
1.Check input power.
2.RESET operation.
OL1
Motor overload
1 .The voltage of the
power supply is too low.
2. The motor setting rated
current is incorrect.
3. The motor stall or load
1 .Check the power grid voltage.
2. Reset the rated current of the
motor.
3. Check the load and adjust the
torque lift.
4. Select a proper motor.
