
Q9 ASD Installation and Operation Manual
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Over-Current Dec
Over-Current During Deceleration.
• Phase-to phase short (U/T1, V/T2, or W/T3).
• Deceleration time is too short.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is
running.
• ASD current exceeds 320% or 340% of the rated
FLA on ASDs that are great than 100 HP or that
are 100 HP or less, respectively, during
acceleration.
Over-Current Run
Over-Current During Fixed Speed
Operation.
• ASD/Motor improperly matched to the application.
• Load fluctuations.
• ASD is operating at an elevated temperature.
• ASD current exceeds 320% or 340% of the rated
FLA on ASDs that are greater than 100 HP or that
are 100 HP or less, respectively, during
acceleration.
Over-Speed
Speed Error (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.
Over-Torque
Over-Torque.
• Output torque requirement in excess of the
settings for a time longer than the
setting.
Over-Voltage Acc
Over-Voltage During Acceleration.
• Motor running during restart.
Over-Voltage Dec
Over-Voltage During Deceleration.
• Deceleration time is too short.
• Stall prevention is disabled.
• 3-phase input voltage is out of specification.
• Input reactance required.
Over-Voltage Run
Over-Voltage During Fixed Speed
Operation.
• Load fluctuations.
• 3-phase input voltage out of specification.
Stack Err
Stack Overflow Error.
• Service call required.
Step-Out (PM)
Step-Out (For PM Motors Only).
• Service call required.
U-Phase OC
U-Phase Over-Current.
• Low impedance at the U/T1 phase.
V/f Control Err
V/f Control Error.
• Service call required.
V-Phase OC
V-Phase Over-Current.
• Low impedance at the V/T2 phase.
W-Phase OC
W-Phase Over-Current.
• Low impedance at the W/T3 phase.
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 a Reset to be recognized. In the event of
multiple active trips, the trip displayed will remain until all faults are corrected and cleared.
Table 12. Fault Codes (Continued)
EOI Display
Fault Description
Possible Cause
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