G7 ASD Operation Manual 179
Overheat • Cooling fan inoperative.
• Ventilation openings are obstructed.
• Internal thermistor is disconnected.
Over Speed • Result of a motor speed that is greater than the commanded speed when using an
encoder for speed control.
• Improper encoder connection or setup information.
• Defective encoder.
Overtorque • A torque requirement by the load in excess of the setting of F616 or F617 for a
time longer than the setting of F618.
• The ASD is improperly matched to the application.
• The load is obstructed.
Overvoltage During Acceleration • Motor running during restart.
Note: The event that caused the Trip(s) must be corrected or must decrease to less than the threshold
value required to cause the trip to allow for a Reset to be recognized. In the event of multiple
active trips, the trip displayed will remain until all faults are corrected and all trips are cleared.
Overvoltage During Deceleration • Deceleration time is too short.
• DBR value is too high.
• DBR required (DBR setup required).
• Stall protection is disabled.
• 3-phase input voltage is out of specification.
• Input reactance required.
Overvoltage During Run • Load fluctuations.
• 3-Phase input voltage out of specification.
PG Type/Connection Error • ASD is configured to receive a signal from a shaft-mounted encoder and no signal
is being received while running.
• Disconnection at the Encoder circuit.
• Motor is stopped and is generating torque via torque limit control.
• ASD is not configured properly.
Phantom Fault • In a multiple ASD configuration a faulted ASD signals the remaining ASDs that a
fault has occurred and shuts down the non-faulted ASDs.
Position Deviation Error • Operating in the Position Control mode and the resulting position exceeds the
limits of the F631 setting.
RAM Fault • Internal RAM malfunction.
ROM Fault • Internal ROM malfunction.
Sink/Source Setting Error • Improperly positioned Sink/Source jumper on the control board or on an option
device.
• Sink/Source configuration of an option device is incorrect.
Torque Proving Fault • Lift-First Pulse Count (F743) adjustment required.
Fault Screen Display Possible Causes
