TABLE OF CONTENTS
0463 733 001 © ESAB AB 2020
READ THIS FIRST
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4
BEFORE STARTING SERVICE
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5
Service aid
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5
ESAB Tools
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5
INTRODUCTION
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6
Overview
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6
Design structure of the power source
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6
Working principle
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6
Block diagram for CSA variant
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7
Block diagram for CE variant
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8
TECHNICAL DATA
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9
SOFTWARE UPDATE AND CONFIGURATION
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12
WIRING DIAGRAM
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13
Component description
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13
Warrior 750i CC/CV CSA variant
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16
Warrior 750i CC/CV CE variant
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18
Position of the components
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20
ERROR DESCRIPTION
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23
TROUBLESHOOTING
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25
Pre-power-up checks
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25
Visual inspection................................................................................... 25
Input measurements............................................................................. 25
15BR1 bridge rectifier measurements.................................................. 26
Power board measurements ................................................................ 27
Checking the secondary rectifier diodes .............................................. 30
Input voltage selection.......................................................................... 31
Testing the electrolytic DC link capacitor board.................................... 31
Checking the VRD components (CE variant) ....................................... 31
Restoring the power source after pre-power-up checks....................... 32
Power-up checks.................................................................................. 32
Restoring the power source after pre-power-up checks....................... 33
DC bus voltage monitoring ................................................................... 35
Electrical test
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36
Filter board 2AP1 measurement .......................................................... 36
15BR1 bridge rectifier measurements.................................................. 36
Power board 15AP1 measurements .................................................... 37
IPS board measurements..................................................................... 37
Control board measurements............................................................... 37
Gate drive board measurements.......................................................... 38
Soft start ............................................................................................... 39