INVT Goodrive350-19 Series Operation Manual page 391

Goodrive350-19 series VFD for crane
Fault
Fault type
code
To-ground
ETH1 short-circuit fault
To-ground
ETH2 short-circuit fault
Speed deviation
dEu
Mal-adjustment
STo
Electronic
LL
underload fault
Encoder offline
ENC1O
Encoder reversal
ENC1D
Encoder Z pulse
ENC1Z
offline fault
OT Motor
Possible cause
VFD output is short connected
to the ground.
Current detection circuit is
faulty.
1 Actual motor power setup
deviates sharply from the VFD
power.
VFD output is short connected
to the ground.
Current detection circuit is
faulty.
2 Actual motor power setup
deviates sharply from the VFD
power.
The load is too heavy or stalled.
fault
SM control parameters are set
incorrectly.
Autotuned parameters are not
fault accurate.
The VFD is not connected to the
motor.
The VFD reports underload
pre-alarm according to the
setting.
Encoder line sequence is
wrong, or signal wires are
fault
poorly connected.
The encoder speed signal is
contrary to the motor running
fault
direction.
Z signal wires are disconnected. Check the wiring of Z signal.
Motor overtemperature input
Check whether the motor wiring is
normal.
Replace the hall component.
Replace the main control board;
Reset the motor parameters
properly.
Check whether the motor wiring is
normal.
Replace the hall component.
Replace the main control board;
Reset the motor parameters
properly.
Check the load to ensure it is
proper, and increase the detection
time;
Check whether the control
parameters are set properly.
Check the load and ensure the
load is normal.
Check whether control
parameters are set correctly.
Increase the maladjustment
detection time.
Check the load and overload
pre-alarm threshold.
Check the encoder wiring.
Reset encoder direction.
Check the wiring of the motor
-379-
Troubleshooting
Solution