Goodrive30 Series VFD Fault tracking
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6.2.3 VFD faults and solutions
When a fault occurred, handle the fault as follows.
1. When a VFD fault occurred, confirm whether keypad display is improper? If yes, contact
INVT.
2. If keypad works properly, check the function codes in P07 group to confirm the
corresponding fault record parameters, and determine the real state when current fault
occurred through parameters.
3. Check the table below to see whether corresponding exception states exist based on the
corresponding corrective measures.
4. Rule out the faults or ask for help from professionals.
5. After confirming faults are removed, reset the fault and start running.
Inverter unit U
phase protection
Acceleration is too fast.
IGBT module is
damaged.
Misacts caused by
interference.
Drive wires are poorly
connected.
To-ground short circuit
occurs.
Increase acceleration time.
Replace the power unit.
Check the drive wires.
Check whether there is
strong interference
surrounds the peripheral
equipment.
Inverter unit V
phase protection
Inverter unit W
phase protection
Overvoltage
during
acceleration
Exception occurred to
input voltage;
Large energy feedback.
Lack of braking units.
Dynamic brake is not
enabled.
Check the 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.
Overvoltage
during
deceleration
Overvoltage
during constant
speed running
Overcurrent
during
acceleration
Acceleration/deceleration
is too fast.
Grid voltage is too low.
VFD power is too small.
Load transient or
exception occurred.
Increase acceleration/
deceleration time.
Check the input power.
Select the VFD with larger
power.
Check if the load is short
Overcurrent
during
deceleration
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