ACE-tronics G9 ASD Installation and Operation Manual 257
Over-Current
During
Acceleration
OC1 • Improper V/f setting.
•
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.
Over-Current
During
Deceleration
OC2 • 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.
Over-Current
Du
ring Run
OC3 • 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.
Over-Heat OH • Cooling fan inoperative.
•
Ventilation openings are obstructed.
• Internal thermistor is disconnected.
Overheat During
Acceleration
OC1P
• Cooling fan inoperative.
• Ventilation openings are obstructed.
• Internal thermistor is disconnected.
• Acceleration time is too short.
• Improper V/f setting.
• ASD or the motor is improperly matched to the application.
LCD Screen LED Screen Possible Causes
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