Appendix 2 Alarm code list
Appendix 198
OC3
Over-current
during
deceleration
The output current is two times
larger than the rated current of
the inverter or the output side
is short.
1.It is recommended to increase the deceleration
time P.8 (01-07)
2.It is recommended to set the base voltage
parameter P.19 (01-04) equal to power supply
voltage
3.It is recommended to add braking unit and braking
resistor
OV0
Over-voltage
at startup
1. The voltage between DC
bus is too high.
2. The external power supply
line has large power
equipment start and stop
affecting the power grid surge.
1.Check whether the input power voltage is
abnormal
2.Check whether the motor is grounded (if so, it is
recommended to remove the ground wire after
turning off the power)
3.Check the insulation condition of the motor power
line (for example: the insulation of the three-phase
motor is short to ground, the power line is
short-circuited, or short circuit between power line
and the metal part of the electric cabinet)
OV1
Over-voltage
during
acceleration
1.Check whether the input power voltage is
abnormal
2.Check whether the motor is grounded (if so, it is
recommended to remove the ground wire after
turning off the power)
3.Check the insulation condition of the motor power
line (for example: the insulation of the three-phase
motor is short to ground, the power line is
short-circuited, or short circuit between power line
and the metal part of the electric cabinet)
OV2
Over-voltage
at constant
speed
1.Check whether the input power voltage is
abnormal
2.Check whether the motor is grounded (if so, it is
recommended to remove the ground wire after
turning off the power)
3.It is recommended to add an input AC reactor at
the input end of the inverter
4.Check the insulation condition of the motor power
line (for example: the insulation of the three-phase
motor is short to ground, the power line is
short-circuited, or short circuit between power line
and the metal part of the electric cabinet)
OV3
Over-voltage
during
deceleration
1.It is recommended to increase the deceleration
time P.8 (01-07)
2.It is recommended to add braking unit and braking
resistor
3.Set the base voltage parameter P.19 (01-04) to
99999
4.Check the insulation condition of the motor power
line (for example: the insulation of the three-phase
motor is short to ground, the power line is
short-circuited, or short circuit between power line
and the metal part of the electric cabinet)
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