255
motor not
running
LED no display
Check whether there is power failure, or phase loss of input power, check if the
power line is connected correctly.
LED no display, but
the internal charging
indicator is on
Check if there is problems with wiring or socket related to keypad. Measure the
voltage of internal control source to check if the switching power supply is
functioning well. If not, check its inlet wire, start oscillation and stabilivolt to see
if they works well.
Motor droning
The motor load is too much. Reduce the load.
No abnormal
phenomena
Check if it is in trip status or hasn’t reset after tripping, check whether it is in
restart status after power down, whether the keypad is reset, whether it is in
program running status, multi-speed operation status, some specific operation
status or non-operation status. Try recovering factory set.
Check whether the running command is sent.
Check whether the operation frequency is set at 0.
The motor can not Acc/Dec
successfully
Improper setting of Acc/Dec time. Increase the value of Acc/Dec time.
The current limit is set too low. Increase the value.
Over-voltage protection action during decelerating. Increase the decelerating
time.
Improper setting of carrier frequency, too much load may cause oscillation.