Q9 ASD Installation and Operation Manual 199
Over-Current
ASD Output Current Greater than F601
Setting.
• Phase-to-phase short (U/T1, V/T2, or W/T3).
• Defective IGBT (U/T1, V/T2, or W/T3).
• ASD output to the motor is connected incorrectly.
• ASD is attempting to start into a spinning motor
after a momentary power loss.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is
starting or while running.
• Acceleration/deceleration time is too short.
• Voltage Boost setting is too high.
• V/f setting adjustment required.
• Load fluctuations.
• ASD is operating at an elevated temperature.
• ASD/Motor improperly matched.
• 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-Heat Over-Heating.
• ASD is operating at an elevated temperature.
• ASD is too close to heat-generating equipment.
• Cooling fan vent is obstructed.
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
Over-Torque
Torque Requirement in Excess of the
Setting of F616 or F617 for a Time Longer
than the Setting of F618.
• ASD is improperly matched to the application.
• Parameter F616 or F617 setting is too low.
• Obstructed load.
Part Replace Part Replacement Alarm. • Part Replacement Alarm at F634 timed out.
Run-Time Counter User-Set Run-Time Counter Exceeded. • Type Reset required; select Clear run timer.
Soft Stall Overload Soft Stall Active. • Soft Stall selection adjustment required (F017).
Thermal Err
Option Thermal Sensor Threshold
Exceeded.
• User-set thermal threshold setting of F646
exceeded.
Under-Current
Output Current of the ASD is Below the
Level Defined at F611.
• Disable detection at F610.
• Parameter F611 adjustment required.
Note: * Reset ignored if active.
Table 11. Alarms (Continued)
EOI Display Fault Description Possible Cause
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