Lincoln Electric SVM118-A Manual Do Utilizador

•  Only Qualified personnel should

perform this maintenance.

•  Turn the input power OFF at the

disconnect switch or fuse box
before working on this equipment.

•  Do not touch electrically hot parts.

This procedure ensures that the power factor capaci-
tors are discharged, for greater safety when you are
working on the Square Wave TIG 355 with INPUT
POWER REMOVED.

1.   Remove input power to the machine.

2.   With a 5/16" nut driver, remove the sheet metal

screws that hold the right case side in place.
Remove the right case side.

3.   With a volt/ohmmeter, carefully check the voltage

across the input power factor capacitors.  When
input power is removed, the voltage across each
capacitor should be zero.  (Normally, the capaci-
tors discharge through the primary winding in the
main transformer.)

4.   If capacitor voltage is zero, you may begin working

on the Square Wave TIG 355.