Undervoltage; Motor Overheating - INVT Goodrive3000 Series Operation Manual

Goodrive3000 series medium voltage VFD

6.3.4 Undervoltage

6.3.5 Motor overheating

Undervoltage fault
Whether the voltage of the
power supply is within the
standard range?
No
Whether the air switch and
contactor are opened or
encounter exceptions?
No
Whether a large-power device
is running on the grid that pulls
down the voltage of the grid?
No
Whether the VFD is
powered off during
running?
No
If it is a VFD fault, contact
our company
Unusual heating of the
motor
Whether the motor
parameters are set
correctly?
Yes
Whether parameter
autotuning is
performed?
Yes
No
Whether the VFD runs at a
low speed all the time?
Yes
Whether it is a variable-
frequency motor?
Yes
Whether the load is
too heavy?
No
Whether the three
phases of the motor are
balanced?
Yes
Whether the carrier
frequency is too low?
No
Whether the motor
cable is too long?
No
If it is a VFD fault, contact
our company
-143-
Yes
Ensure the power supply
meet the requirement
Close the air switch and
Yes
contactor; and rectify the
exceptions
Yes
Adjust the input of the
grid
Identify the power-off
Yes
causes, and rectify the
exceptions
Set the motor
No
parameters
correctly
No
Parameter
autotune
No
Use a variable-
frequency motor
Yes
Reduce the
load
No
Replace the
motor
Set the carrier
Yes
frequency
properly
Yes
Add an output
filter
Goodrive3000 inverter