Troubleshooting Guide - ESAB Powercut 650 Instruction Manual

section 5

5.3 trouBleshooting guiDe

a.
B. no air
Is air hose connected?
Is air adjusted to 65 - 75 psig?
Does air come on with air check switch?
Check continuity of torch switch
Repair power source
Difficult starting.
• Change electrode
• Change nozzle
• Check for good, clean connection of work lead to workpiece
• Check air pressure (65 - 75 psig)
• Check torch power cable for continuity
Depress torch switch. After 2 seconds, is high frequency present?
Yes
Repair power
source
Yes
Yes
Yes
OK
figure 5-2. sequence of operations
No
No
No
No
23
maintenance
No
Repair/replace
high frequency
unit
Connect
Adjust
• No electrode in torch
• No valve pin in torch
• Replace electrode
• Replace valve pin
Replace torch switch