TROUBLESHOOTING BASICS

When your system does not function properly (or as you expect it to operate), the first thing that you must do is identify and isolate the prob- lem. When you have accomplished this, you can effectively begin to resolve the problem.

The first step is to isolate each system component and ensure that each component functions properly when it is run independently. You may have to dismantle your system and put it back together piece by piece to detect the problem. If you have additional units available, you may want to exchange them with existing components in your system to help iden- tify the source of the problem.

Determine if the problem is mechanical, electrical, or software-related. Can you repeat or re-create the problem? Random events may appear to be related, but they are not necessarily contributing factors to your problem.

You may be experiencing more than one problem. You must isolate and solve one problem at a time. Log (document) all testing and problem isolation procedures. You may need to review and consult these notes later. This will also prevent you from duplicating your testing efforts.

Once you have isolated a problem, take the necessary steps to resolve it.

Refer to the problem solutions contained in this chapter.

DIAGNOSTIC LEDS

The E-AC Drive has two LEDs on its front panel. The following summary of LED functions may help you isolate problems.

LED Name

Color

Function

PWR (POWER)

Green

Illuminates when AC power is applied

 

 

Off if AC power is under voltage (<95VAC)

FLT (FAULT)

Red

Indicates short circuit in motor or cabling; or

 

 

Drive overtemperature

PROTECTIVE CIRCUITS

The E-AC Drive has several protective circuits, some of which can indicate fault conditions by illuminating one of the above LEDs.

OVERTEMPERATURE PROTECTION

To protect against damage from high temperatures, the E-AC Drive has an internal temperature sensor. If the sensor reaches 55° C (131° F) it will trigger an overtemperature fault. The red FAULT LED will illuminate, and the drive will shut down. This is a latched fault. To restart the drive, first allow it to cool, then cycle power or toggle the reset input.

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E-AC Drive Hardware Installation Guide

Chapter 3 – Troubleshooting

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Parker Hannifin 88-020292-01 A Troubleshooting Basics, Diagnostic Leds, Protective Circuits, Overtemperature Protection