HX7+ ASD Installation and Operation Manual 201
Overcurrent During Acceleration • V/f setting needs to be adjusted.
• Restart from a momentary power outage.
• The ASD is starting into a rotating motor.
• ASD/Motor not properly matched.
• Phase-to-phase short (U, V, or W).
• Accel time too short.
• Voltage Boost setting is too high.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is running.
• ASD current exceeds 340% of the rated FLA on ASDs that are 100 HP or less
during acceleration. On ASDs that are greater than 100 HP, this fault occurs when
the ASD current exceeds 320% of the rated FLA during acceleration.
Overcurrent During Deceleration • Phase-to-phase short (U, V, or W).
• Deceleration time is too short.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is running.
• ASD current exceeds 340% of the rated FLA on ASDs that are 100 HP or less
during deceleration. On ASDs that are greater than 100 HP, it occurs when the
ASD current exceeds 320% of the rated FLA during deceleration.
Overcurrent During Run • Load fluctuations.
• ASD is operating at an elevated temperature.
• ASD current exceeds 340% of the rated FLA on ASDs that are 100 HP or less
during a fixed-speed run or if during a fixed-speed run the ASD overheats. On
ASDs that are greater than 100 HP, it occurs when the ASD current exceeds 320%
of the rated FLA on a fixed-speed run.
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.
Fault Screen Display Possible Causes
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