Chapter 3 – Troubleshooting

33
E-AC Drive Hardware Installation Guide

SHORT CIRCUIT PROTECTION

The E-AC Drive has short circuit protection. When the drive detects a
short circuit in the motor or motor cabling, it illuminates the FAULT LED,
and stops producing motor current. This is a latched condition. To restart
the drive, first remove power to the drive; fix the short in the motor or
cable; then reapply power.
AUTOMATIC TEST
Often in diagnosing a problem, it is helpful to rule out possible causes. If
you disconnect the load and controller from the drive, four components
remain—the drive, motor, motor cable, and power cable.
You can then configure the drive to run the automatic test function. See
instructions near the beginning of Chapter 2 Installation. If the motor
turns as expected—in an alternating mode—then the drive, motor, and
cables are probably not the cause of the problem. The cause may lie with
the controller, software, mechanics, etc.
ANTI-RESONANCE DISABLE
If your mechanical system is highly resonant at precisely the wrong
frequency, anti-resonance might interpret the mechanical vibrations as
rotor position error. You would notice greater torque ripple, increased
audible noise, and possibly even stalling. To solve these problems, try
disabling anti-resonance (SW2-#1 off), and see if the problems improve.
TECHNICAL SUPPORT
If you cannot solve your system problems using this documentation,
contact your local Automation Technology Center (ATC) or distributor for
assistance. If you need to talk to our in-house application engineers,
contact Parker Compumotor’s Applications Department at (800) 358-
9070.