Troubleshooting - ESAB Powercut 650 Manuel D'instructions

SECtIoN 5
WArNINg
ElECtrIC SHoCK CAN KIll! Be sure that all
primary power to the machine has been
externally disconnected. open the line
(wall) disconnect switch or circuit breaker
before attempting inspection or work
inside of the power source.
WArNINg
Voltages in plasma cutting equipment
are high enough to cause serious injury
or possibly death. Be particularly careful
around equipment when the covers are
removed.

5.2 trouBlESHootINg

Check the problem against the symptoms in the following troubleshooting guide.
The remedy may be quite simple. If the cause cannot be quickly located, shut off
the input power, open up the unit, and perform a simple visual inspection of all the
components and wiring. Check for secure terminal connections, loose or burned
wiring or components, bulged or leaking capacitors, or any other sign of damage
or discoloration.
The cause of control malfunctions can be found by referring to the sequence of
operations (Figures 5-2 and 5-5) and electrical schematic diagram and checking the
various components. A volt-ohmmeter will be necessary for some of these checks.
Before checking voltages in the circuit, disconnect the power from the high frequency
generator to avoid damaging your voltmeter.
116
MAINtENANCE
NOTE