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15. Troubleshooting Procedure
Preliminary
Introduction
This section provides information needed in preparation for locating and interpreting visual
indicators to help identify problems.
When replacing a part does not correct the problem or visual indicators do not identify a defective
part, notify ABB Power Technical Support.
Safety
Review all safety instructions and warnings in the Safety section of the GPS Installation Guide before
•
Hazardous ac and dc voltages and/or energy are present. Caution should be exercised. Tools must be insulated to
help prevent accidental contact with live surfaces.
•
Coordinate all troubleshooting activities with other personnel that may be working on the system.
Tools
The following tools are necessary in order to troubleshoot the GPS 4827:
•
Calibrated digital voltmeter (DVM) (0.05 accuracy on dc scale)
•
ESD wrist strap
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Table 1: Warnings
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Table of Contents
Troubleshooting
