Automated Fault Detection and 
Diagnostics for Vapor Compression 
Cooling Equipment

June 1999

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Table of Contents

PPT Slide

Vapor Compression Systems

The Need for Low Cost Solutions

Measurement Costs vs. Benefits

Hand Tools vs. Automated FDD

Current Status

Fully Automated FDD

Frequency of Faults for Rooftops

Service Costs for Rooftops

Causes of Early Compressor Failure

Implications for Automated FDD

Elements of an FDD System

FDD Module

FDD Module - Diagnostic Rules

FDD Sensitivity - Example Results

Evaluator Module

Example Fault Impacts

Example Fault Impacts

Example Fault Impacts

Commercial Future

Author: Jim Braun

Email: diagworkshop@poet.lbl.gov

Home Page: http://poet.lbl.gov/diagworkshop/proceedings/