ESAB PCM-875A - Page 6

PCM-875A System Table of Contents
iv
Section 6 Troubleshooting Page 6-(_)
6.1 Troubleshooting PCM-875A Plasmarc System ................................................ 1
6.2 Console ......................................................................................................... 2-8
6.2.1 Power Light (PL1) does not come on....................................................... 2
6.2.2 No Air Flow............................................................................................. 2
6.2.3 Power Light is on but nothing happens when signal is given to fire with
no fault light .........................................................................................
3
6.2.4 Fault light activates when torch fire signal is given.................................... 4-5
6.2.5 Air is on but nothing happens when torch fire signal is given .................... 6
6.2.6 High Frequency and Pilot Arc are on but no main arc transfer .................. 7
6.2.7 Poor Cutting Performance....................................................................... 7
6.2.8 Air does not shut off................................................................................ 7
6.2.9 Main arc difficult to start.......................................................................... 8
6.3 Reference Voltage Checks.............................................................................. 9
6.4 PT-20AMX Torch Troubleshooting10 .............................................................. 10-11
6.4.1 Insufficient Penetration ............................................................................ 10
6.4.2 Main Arc Extinguishes............................................................................. 10
6.4.3 Dross Formation ..................................................................................... 10
6.4.4 Double Arcing......................................................................................... 11
6.4.5 Uneven Arc............................................................................................. 11
6.4.6 Unstable Cutting Conditions.................................................................... 11
6.4.7 Main Arc Does Not Strike........................................................................ 11
6.4.8 Poor Consumable Life............................................................................. 11
6.5 230V Power Console Electrical Drawings ........................................................ 12-17
6.5.1 Schematic .............................................................................................. 12-13
6.5.2 Wiring Diagrams ..................................................................................... 14-17
6.6 400V Power Console Electrical Drawings ........................................................ 18-23
6.6.1 Schematic .............................................................................................. 18-19
6.6.2 Wiring Diagrams ..................................................................................... 20-23
6.7 Remote Arc Starter Schematic........................................................................ 24
Section 7 Replacement Parts Page 7-(_)
7.1 General .......................................................................................................... 1
7.2 Ordering......................................................................................................... 1
7.3 PCM875A Power Console – 230V .................................................................. 2-9
7.4 PCM-875A Power Console – 400V ................................................................. 10-18
7.5 Remote Arc Starter......................................................................................... 19-21
7.6 PT-20AMX Plasmarc Cutting Torch................................................................. 22-25
Customer/Technical Information
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