INVT Goodrive300-01A Series Operation Manual page 98

Goodrive300-01A series VFD for air compressor
Fault
Fault type
code
[28] Parameter
DNE
download error
[32] To-ground short
ETH1
circuit fault 1
[33] To-ground short
ETH2
circuit fault 2
[34] Speed deviation
dEu
[35] Maladjustment
STo
[36] Electronic
LL
underload fault
[38] Phase
PSF
sequence fault
[39] 3PH current
SPOF imbalance of
power-frequency fan

Keypad line is poorly
contacted or disconnected.

Keypad wire is too long or
suffers strong interference.

Storage data in the keypad
is wrong.

VFD output is short
circuited to ground.

Current detection circuit is
faulty.

Actual motor power setup
differs sharply from the
VFD power.

Load is too heavy or stall.
fault

Control parameters of
synchronous motor is set
improperly.

Autotuning parameters are
fault
inaccurate.

VFD is not connected to
the motor.

The VFD reports underload
pre-alarm according to the
set value.

The phase sequence on
power input side is
negative.

Phase loss occurs to 3PH
wiring of the fan.

Stator winding of 3PH of
the fan is abnormal.

Poor grid quality.
Possible cause
-93-
Fault information and troubleshooting
Solution

Check the environment and
rule out the interference
source.

Replace the hardware, ask
for maintenance service.

Re-copy the data in the
keypad.

Check whether motor wiring
is normal/motor is short
circuited to ground.

Replace the hall.

Replace main control
board/drive board.

Reset correct motor
parameters.

Check the load and ensure
it is normal, increase the
detection time.

Check whether control
parameters are proper.

Check the load and ensure
the load is normal.

Check whether control
parameters are set
correctly.

Increase maladjustment
detection time.

Detect the load and
underload pre-alarm
threshold.

Swop any two of the power
input cables.

Check whether the fan is
disconnected or poorly
contacted.

Measure whether the 3PH
winding impedance of the
fan is balanced.