16 Snap-on Tools Corporation Kenosha, WI 53141-1410
FAULT POSSIBLE CAUSE REMEDY
TROUBLE SHOOTING (Cont.)
(SYMBOL*)
FOR TECH. SERVICE, CALL 1-800-232-9353
EQUIPMENT MALFUNCTION (Cont.)
Main power on, Loose torch thumb screw. Tighten thumb screw.
torch Broken or loose connection. Check cables for
trigger continuity.
activated, Repair or tighten
no welding connections.
current, but Unplugged or faulty power Plug in or replace
gas flows & contactor switch.
(W)
switch.
wire feeds. #1 Transformer wire off. Reattach wire.
(W)
"Opened" thermal switch. Allow unit to cool, then
(TP1)
retry.
Faulty diodes. Check diodes. See page
(D1-D2)
18.
Main power on, No shielding gas Replace tank.
torch - tank empty.
trigger Loose or broken Tighten or repair
activated, connections. connections.
no gas flow, Faulty Gas solenoid Repair or replace
but contactor valve.
(GS)
valve.
operates & Clogged gas flow path. Locate & clean clog.
wire feeds. Loose spot timer circuit Install properly.
board.
(PC2)
Defective spot timer Replace board.
circuit board.
(CR2)(PC2)
FAULTY WELDS
"Jerky" or Worn , kinked or dirty torch Clean or replace
"slipping" liner. liner.
wire feed. Wire spool turns too Lubricate spool hub
hard. with a dry lubricant.
Worn double v-groove drive Replace drive roll.
roll.
Weak pressure roll spring. Replace spring.
Worn or dirty contact tip. Replace contact tip.
Worn inlet guide(s). Clean or replace guides.
Sticking pressure roll. Replace pressure roll.
Feed roll tension incorrect. Adjust feed roll tension.
See page 8.
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