Goodrive270 series VFD for fan and pump Troubleshooting
-241-
Fault
Fault type Possible cause Solution
OUt3
Inverter unit
W-phase protection
Drive wires connected
poorly.
To -ground short circuit
interference surrounding the
peripheral device.
OV1
Overvoltage during
DEC time too short.
Input voltage exception.
Large energy feedback.
No braking components.
Energy-consumption
braking is not enabled.
Check the input power.
Check whether load DEC time is
too short or the motor starts
during rotating.
Install dynamic braking
components.
Check the setting of related
OV2
Overvoltage during
OV3
Overvoltage during
constant speed
running
OC1
Overcurrent during
ACC
ACC/DEC too fast.
Grid voltage too low.
VFD power too small.
Load transient or
exception occurred.
To -ground short circuit or
output phase loss
occurred.
Strong external
interference sources.
The overcurrent stall
protection is not enabled.
Increase ACC/DEC time.
Check the input power.
Select a VFD with larger power.
Check whether 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 setting of related
OC2
Overcurrent during
deceleration
OC3
Overcurrent during
constant speed
running
UV
Bus undervoltage
fault
Grid voltage too low.
The overvoltage stall
protection is not enabled.
Check the grid input power.
Check the setting of related
OL1 Motor overload
Grid voltage too low.
Motor rated current set
incorrectly.
The motor stall occurs or
the load transient is too
Check the grid voltage.
Reset the rated current of the
motor.
Check the load and adjust the
torque boost quantity.
OL2 VFD overload
ACC too fast.
The motor in rotating is
restarted.
Grid voltage too low.
Increase ACC time.
Avoid restart after stop.
Check the grid voltage.
Select a VFD with larger power.
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