UV fault
Check that if there is
powering off during
the running of the VFD
If the voltage of the power supply
is in the standard range
Ensure the power supply
meet the need
Check if the air switch and
contactor on the inside is off or
abnormal or not
Switch on the air switch
and contactor and settle
the abnormal
Adjust the power supply
Ensure the power off
reason and settle the
abnormal
If it is a VFD fault, please
contact with our
company
Check if there is big power
device in the same power supply
Yes
No
Yes
No
Yes
No
Yes
No