Goodrive350-19 series VFD Troubleshooting
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Fault
code
Fault type
Possible cause
Corrective measure
OUt2
Inverter unit
Phase-V protection
IGBT module is damaged;
Misacts caused by
interference; drive wires are
poorly connected;
To-ground short circuit
occurs
Replace the power unit;
Check drive wires;
Check whether there is strong
interference surrounds the
peripheral equipment
OUt3
Inverter unit
Phase-W protection
OV1
Over-voltage during
acceleration
Exception occurred to input
voltage;
Large energy feedback;
Lack of braking units;
Dynamic brake is not
enabled
Check input power;
Check whether load
deceleration time is too short;
or the motor starts during
rotating;
Install dynamic braking units;
Check the setup of related
function codes
OV2
Over-voltage during
deceleration
OV3
Over-voltage during
constant speed
running
OC1
Over-current during
acceleration
Acceleration is too fast;
Grid voltage is too low;
VFD power is too small;
Load transient or exception
occurred;
To-ground short circuit or
output phase loss occur;
Strong external interference
sources;
Overvoltage stall protection
is not enabled
Increase acceleration
/deceleration time;
Check input power;
Select the VFD with larger
power;
Check if the load is short
circuited (to-ground short circuit
or line-to-line short circuit) or
the rotation is not smooth;
Check the output wiring;
Check if there is strong
interference;
Check the setup of related
function codes.
OC2
Over-current during
deceleration
OC3
Over-current during
constant speed
running
UV
Bus undervoltage
fault
Grid voltage is too low;
Overvoltage stall protection
is not enabled
Check grid input power;
Check the setup of related
function codes