Overcurrent; Countermeasures On Common Interference; Interference On Meter Switches And Sensors - INVT Goodrive350-19 Series Operation Manual

Goodrive350-19 series VFD for crane

8.6.8 Overcurrent

If it is a VFD fault or
No
interference, contact
our company

8.7 Countermeasures on common interference

8.7.1 Interference on meter switches and sensors

Interference phenomenon
Pressure, temperature, displacement, and other signals of a sensor are collected and displayed by a
human-machine interaction device. The values are incorrectly displayed as follows after the VFD is
started:
1. The upper or lower limit is wrongly displayed, for example, 999 or -999.
2. The display of values jumps (usually occurring on pressure transmitters.
3. The display of values is stable, but there is a large deviation, for example, the temperature is
dozens of degrees higher than the common temperature (usually occurring on thermocouples).
4. A signal collected by a sensor is not displayed but functions as a drive system running feedback
signal. For example, the VFD is expected to decelerate when the upper pressure limit of the
multimeter. Whether the voltage
Reduce the torque of
Yes
the load and
过电流
increase the capacity
of the VFD
Whether the
Yes
torque boost
is too high?
Yes
Modify the torque
boost
Motor stalls during
ACC
Whether the ACC
time is too short?
No
Check the voltage of the
terminals of the motor with a
is within the defined range?
No
Whether the load
or inertia is too
large?
No
Whether the load
torque is too large?
No
Whether it is V/F
control?
No
Whether parameter
autotuning is
performed?
Yes
If it is a VFD fault or
interference, contact our
company
-393-
Yes
Increase the ACC
time
Yes
Use larger cables, shorten the
wiring distance, adjust the voltage
drop of the output reactor, etc.
Yes
Whether a special
motor is used?
No
Reduce the inertia of
the load and
increase the capacity
of the VFD
No
Overcurrent
Troubleshooting
Yes
Contact our
company