INVT Goodrive270 Series Operation Manual page 277

Goodrive270 series VFD for fan and pump
Fault
Fault type
code
[2] Inverter unit
OUt2
V-phase protection
[3] Inverter unit
OUt3
W-phase protection
[7] Overvoltage
OV1
during ACC
[8] Overvoltage
OV2
during DEC
[9] Overvoltage
OV3 during constant
speed running
[4] Overcurrent
OC1
during ACC
[5] Overcurrent
OC2
during DEC
[6] Overcurrent
OC3 during constant
speed running
UV
undervoltage
OL1 [11] Motor overload
OL2 [12] VFD overload
Misoperation caused by
interference.
Drive wires connected
poorly.
To-ground short circuit
occurred.
DEC time too short.
Input voltage exception.
Large energy feedback.
No braking components.
Energy-consumption
braking is not enabled.
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.
Grid voltage too low.
[10] Bus
The overvoltage stall
protection is not enabled.
Grid voltage too low.
Motor rated current set
incorrectly.
The motor stall occurs or
the load transient is too
large.
ACC too fast.
The motor in rotating is
restarted.
Possible cause
-267-
Troubleshooting
Solution
Check drive wires.
Check whether there is strong
interference surrounding the
peripheral device.
Check the input power.
Check whether load DEC time is
too short or the motor starts
during rotating.
Install dynamic braking
components.
Check the settings of related
function codes.
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 whether there is strong
interference.
Check the settings of related
function codes.
Check the grid input power.
Check the settings of related
function codes.
Check the grid voltage.
Reset the rated current of the
motor.
Check the load and adjust the
torque boost quantity.
Increase ACC time.
Avoid restart after stop.
Check the grid voltage.