INVT Goodrive300-01A Series Operation Manual page 95

Goodrive300-01A series VFD for air compressor
Chapter 6 Fault information and troubleshooting
6.1 VFD faults and solutions
Note: The numbers enclosed in square brackets such as [1], [2] and [3] in the Fault type column in
the following table indicate the VFD fault type codes read through communication.
Fault
Fault type
code
[1] Inverter unit U
OUt1
phase protection
[2] Inverter unit V
OUt2
phase protection
[3] Inverter unit W
OUt3
phase protection
[4] Overcurrent at
OC1
acceleration
[5] Overcurrent at
OC2
deceleration
[6] Overcurrent at
OC3
constant speed
[7] Overvoltage at
OV1
acceleration
[8] Overvoltage at
OV2
deceleration
[9] Overvoltage at
OV3
constant speed
[10] Bus
UV
undervoltage fault
OL1 [11] Motor overload
Possible cause

Acceleration is too fast.

Internal damage occurs to
the IGBT of this phase.

Misacts caused by
interference.

Drive wires are connected
improperly.

Short-circuited to ground.

Acceleration or
deceleration is too fast.

Grid voltage is too low.

VFD power is too low.

Load transients or is
abnormal.

Short-circuited to ground,
output phase loss.

There is strong external
interference.

The input voltage is
abnormal.

There is large energy
feedback.

Grid voltage is too low.

Grid voltage is too low.

Rated motor current is set
improperly.

Motor stalls or load
-90-
Fault information and troubleshooting
Solution

Increase acceleration time.

Replace power unit.

Check the drive wires.

Check whether peripheral
equipment suffers from
strong interference source.

Increase acceleration
/deceleration time.

Check the input power.

Adopt the VFD with a larger
power.

Check if the load is short
circuited (short circuited to
ground or between wires) or
stall occurs.

Check the output wiring.

Check if there is strong
interference.

Check the input power.

Check if the deceleration
time of the load is too short
or the motor starts during
the rotating, or dynamic
brake units needs to be
installed.

Check the grid input power.

Check grid voltage.

Reset rated motor current.

Check load and adjust
torque boost quantity