3-25
MAINTENANCE
Service Manual
From
page 3-24
Cutting current
adjustable ?
Connect work clamp to workpiece. Set
AMPS control P1 to minimum (20 amps).
Depress torch start switch to transfer arc to
workpiece.
Yes
Arc transfers
?
Set AMPS control to maximum (50
amps). Depress torch start switch
to transfer arc to workpiece to see
if cutting current is adjustable.
Yes
Replace AMPS control
pot P1. If new pot
does not fix problem,
replace control board.
Check TP1 of
control board for
12V.
No
12V?
Check that work clamp is
making good
metal-to-metal contact.
Work
clamp
OK?
No
Repair or replace work
cable and clamp.
No
No
Replace
control
board
Yes
Replace
consumables.
If arc does not
transfer after
changing
consumables,
replace
control board.
Yes
Corrective maintenance
checks complete.
Yes
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