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.
