178 G7 ASD Operation Manual
Motor Overload • V/f setting needs to be adjusted.
• Motor is locked.
• Continuous operation at low speed.
• Load requirement exceeds ability of the motor.
• Startup frequency setting adjustment required.
No Fault • No active faults.
Option Fault • Optional device malfunction.
• Improper system settings (at ASD or optional device).
• Loose or improper connection.
Output Current Protection Fault • Output current is not within specified limits.
• Loose or improper ASD-to-motor connection.
Output Phase Loss • 3-phase output from the ASD is low or missing.
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.
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.
Fault Screen Display Possible Causes
