INVT Goodrive18 Series - Page 110

Goodrive18 series two-in-one VFD Troubleshooting
-105-
When both inverter units encounter faults, each inverter unit shows the respective fault.
Fault code
Fault type
Possible cause
Solutions
OV1
ACC overvoltage
The input voltage is
abnormal;
There is large energy
feedback;
No braking components;
Braking energy is not open.
Check the input power;
Check if the DEC time of
the load is too short or the
VFD starts during the
rotation of the motor or it
needs to increase the
energy consumption
components;
Install the braking
components;
Check the setting of related
function codes.
OV2
DEC overvoltage
OV3
Constant-speed
overvoltage
OC1
ACC overcurrent
The acceleration or
deceleration is too fast;
The voltage of the grid is
too low;
The power of the VFD is
too low;
The load transients or is
abnormal;
The grounding is short
circuited or the output is
phase loss;
There is strong external
interference;
The overvoltage stall
protection is not open.
Increase the ACC time;
Check the input power;
Select the VFD with a
larger power;
Check if the load is short
circuited (the grounding
short circuited or the wire
short circuited) or the
rotation is not smooth;
Check the output
configuration;
Check if there is strong
interference;
Check the setting of related
function codes.
OC2
DEC overcurrent
OC3
Constant-speed
overcurrent
UV
Bus under-voltage
The voltage of the power
supply is too low.
Check the input power of
the supply line.
OL1
Motor overload
The voltage of the power
supply is too low;
The motor setting rated
current is incorrect;
The motor stall or load
transients is too strong.
Check the power of the
supply line;
Reset the rated current of
the motor;
Check the load and adjust
the torque lift.