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Error
Text
Code
Message
IPM Error
Bus Undervoltage
Bus Overvoltage
Motor Overspeed
Excess Position Error
Motor Continuous Current
Overload
Possible Cause
Motor cables shorted
Motor winding shorted internally
Drive temperature too high
Operation above continuous power
rating
Drive has a bad IPM output, short circuit,
or overcurrent
Low AC line/AC power input
Attempted to enable drive without main
power active.
Excessive regeneration of power (i.e.,
When the motor is driven by an external
mechanical force, it may regenerate too
much peak energy through the drive's
power supply and the drive faults to save
itself from an overload.)
Excessive AC input voltage
Motor speed exceeds maximum
Position error exceeds permitted value
The internal filter protecting the motor
from overheating has tripped
Ultra1500 Digital Drives Quick Start
Action/Solution
Verify continuity of motor power cable and
connector.
Disconnect motor power cables from the
motor. If the motor is difficult to turn by hand,
it may need to be replaced.
• Check for clogged vents or defective fan.
• Ensure cooling is not restricted by
insufficient space around the drive.
• Verify ambient temperature is not too
high.
• Operate within the continuous power
rating.
• Reduce acceleration rates.
Remove all power and motors connections,
then perform a continuity check from the DC
bus to the U, V, and W motor terminals. If
continuity exists, check for wire fibers
between terminals, or send drive in for repair.
• Verify voltage level of the incoming AC
power.
• Check AC power sources for glitches or
line drop.
• Install uninterruptible power supply (UPS)
on the AC input.
Apply main power before enabling drive.
• Verify shunt circuit.
• Adjust motion profile to stay within the
range of the regenerative resistor.
• Replace regenerative transistor.
• Replace drive.
Verify input is within specification.
• Confirm encoder wiring.
• Retune drive system.
• Verify input gain of external speed or
torque command.
• Increase following error limit.
• Check position loop tuning.
• Reduce acceleration rates.
• Reduce duty cycle (ON/OFF) of
commanded motion.
• Increase time permitted for motion.
• Use larger drive and motor.
• Checking tuning.
Publication 2092-QS001D-EN-P — July 2005
9
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