Prest-O-Lite 550, Инструкция по эксплуатации

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c. air does not shut off
Does arc start when nozzle contacts work without depressing torch switch?
Yes No
Check for short in torch switch
Does air flow even when Prest-O-Lite ® 550 power switch is OFF?
Yes No
Replace Repair/replace control
solenoid valve PCB
B. no air
Is air hose connected?
Yes No Connect
Is air adjusted to 55 - 65psi (4 - 5 bar)?
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 /replace power source
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