5 Troubleshooting
VFD700 AC Drive Getting Started Guide 77
Issues
Reasons
Checking And Treatments
Motor accel.
or decel. is
not stable
Accel. or decel. time is
too short
set suitable values for P00.09 and P00.10
overload
Adjust the load condition
After accel. or
decel.
operation,
speed is not
stable
Load issue
Check if the mechanical load keeps changing
No auto-tune
Do the motor auto-tune
Motor data setup issue
Check if the motor data are set according to the motor
nameplate
parameters can
not be written
Change is limited
the parameter can onlybe changedin stop state
The parameter property is
"actual"
Keypad is locked
Press and hold ESC key for 5 seconds to disable the
keypad lock
Parameter is not
displayed
Set the value of P00.02 to be 1 to display all the
parameters
the user code is
enabled
Disable the user code
Conflicts in parameter
setup
Load default and set the parameters correctly
No display on
the keypad
Link issue
Check if the link between the keypad and drive, and the
keypad are fixed well?
DC bus busbar link
issue
Check if the link bDC and +DC1is fitted well
