1
Page
Introduction 2
Safety 2
Description of Operation 5
Sequence of Operation 9
Status Messages 11
Warning Messages 12
Alarm Messages 13
Troubleshooting Tips 17
Flow Charts 18
Symptom/Cause Charts 21
Testing the Soft Charge Circuit 23
Testing the Input Rectifiers 25
Testing the Inverter Section 26
Testing the Heatsink Temperature Sensor 27
Testing for Output Phase Imbalance 27
Testing Gate Drive Firing Circuits 28
Testing Input Rectifiers 30
Testing for Current Feedback 30
Removing and Replacing the Control Card 31
Removing and Replacing the Interface Board 31
Removing and Replacing Gate/Snubber/IGBT 32
Removing and Replacing Input Rectifiers 33
Current Limit Trips 35
Unstable Motor Operation 35
Ground Fault Trips 37
Overcurrent Trips 37
Overvoltage Trips 38
Overtemperature Trips 39
Additional Fault Codes I
Spare Parts List II
Block Diagram VLT 3032 III
Block Diagram VLT 3042 IV
Block Diagram VLT 3052 V
Table of Contents
Section Three Dynamic
Test Procedures
Section Three Static
Test Procedures
Section Two
Section One
Section Four
Section Five
Appendix
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