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.