Goodrive350A series high-performance multifunction VFD
Troubleshooting
-289-
Fault code
Fault type
Possible cause
Corrective measures
OUt2
[2] Inverter unit
phase-V protection
Misacts caused by
interference; drive wires are
poorly connected;
Shorted to ground.
Check drive wires;
Check whether there is strong
interference surrounds the
peripheral equipment
OUt3
[3] Inverter unit
phase-W protection
OV1
[7] Over-voltage
during acceleration
Deceleration time is too
short;
Exception occurred to input
voltage;
Large energy feedback;
Lack of braking units;
Dynamic braking 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
[8] Over-voltage
during deceleration
OV3
[9] Over-voltage
during constant
speed running
OC1
[4] 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;
Overcurrent 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
[5] Over-current
during deceleration
OC3
[6] Over-current
during constant
speed running
UV
[10] 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
OL1
[11] Motor overload
Grid voltage is too low;
Rated motor current is set
improperly;
Motor stall or load jumps
violently
Check grid voltage;
Reset rated motor current;
Check the load and adjust
torque boost
OL2
[12] VFD overload
Acceleration is too fast;
The motor in rotating is
restarted;
Increase acceleration time;
Avoid restart after stop;
Check grid voltage;