ESAB Powercut 650, Instruction Manual, Page: 23 / 56

23
Depress torch switch. After 2 seconds, is high frequency present?
No
Repair/replace
high frequency
unit
Repair power
source
Yes
5.3 trouBleshooting guiDe
a. 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
B. no air
Is air hose connected?
Yes No Connect
Is air adjusted to 65 - 75 psig?
Yes No Adjust
Does air come on with air check switch?
Yes No • No electrode in torch
• No valve pin in torch
• Replace electrode
Check continuity of torch switch • Replace valve pin
OK No Replace torch switch
Repair power source
figure 5-2. sequence of operations
section 5 maintenance