Faults - Causes - Remedies - Schneider Altivar 28 Manual De Usario

Faults - Causes - Remedies

Speed controller does not start, no fault displayed
• The assignment of the "Fast stop" or "Freewheel stop" functions will prevent the controller from starting
if the corresponding logic inputs are not powered up. The ATV-28 then displays "nSt" in freewheel stop
mode and "FSt" in fast stop mode. This is normal since these functions are active at zero so that the
controller will be stopped safely if there is a wire break
• On power-up or a manual fault reset or after a stop command, the motor cannot be powered up until
the "forward", "reverse" and "DC injection stop" commands have been reset. If they have not been reset,
the speed controller will display "rdY" but will not start. If the automatic restart function is configured
(parameter Atr in the drC menu), these commands are taken into account without a reset being
necessary
Faults which cannot be reset automatically
The cause of the fault must be corrected before resetting by powering down and then powering up.
Fault Probable cause
- - - - O O O O C C C C F F F F - ramp too short
overcurrent - inertia or load too high
- mechanical blocking
- motor phase short-circuit
- - - - S S S S C C C C F F F F - short-circuit or earthing at the
motor short-circuit speed controller output
- significant earth leakage current
at the drive output if several motors
are connected in parallel
- internal fault
- - - - I I I I n n n n F F F F
internal fault
- - - - t t t t n n n n F F F F - special motor or motor whose
auto-tuning fault power is not suitable for the speed
controller
- motor not connected to the drive
- internal fault
- - - - E E E E E E E E F F F F
internal fault
(EEPROM)
93
Remedy
- Check the settings
- Check the motor/speed controller/load sizing
- Check the state of the mechanism
- Check the cables connecting the drive to the motor
- Check the cables connecting the speed controller to
the motor, and the insulation of the motor
- Adjust the switching frequency
- Add motor chokes
- Check the environment (electromagnetic compatibility)
- Check that the "local control" option has not been
connected or disconnected with the controller powered up
- Send the speed controller to be checked/repaired
- Use the L or the P ratio
- Check the presence of the motor during auto-tuning
- If a downstream contactor is being used, close it dur-
ing auto-tuning
- Send the speed controller to be checked/repaired
- Polluted environment, ensure the installation
guidelines contained in the manuals have been
respected