16
Systematics , Inc. 1025 Saunders Lane West Chester, PA. 19380
FAULT
POSSIBLE CAUSE
REMEDY
TROUBLE SHOOTING (Cont.)
(SYMBOL*)
FOR TECH. SERVICE, CALL 1-610-696-9040
(continued on following page)
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.
(W)
Reattach wire.
"Opened" thermal switch.
Allow unit to cool, then
(TP1)
retry.
Faulty diodes.
(D1-D2)
Check diodes. See page
18.
Torch
No shielding gas
Replace tank.
trigger
- tank empty.
activated,
Loose or broken
Tighten or repair
no gas flow,
connections.
connections.
but contactor
Faulty Gas solenoid
Repair or replace
operates &
valve.
(GS)
valve.
wire feeds.
Clogged gas flow path.
Locate & clean clog.
Loose spot timer (MP140S)
Install properly.
circuit board.
(PC2)
Defective spot timer (MP140S)
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
Lub spool shaft. Read-
just
hard.
spool drag.
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 ten-
sion.
See page 7.
