Lincoln Electric SVM104-A Manual Do Utilizador

The air begins to flow, the
"OUTPUT ON" LED lights for a
short time, but no pilot arc is
established.  The high frequen-
cy arc does NOT

appear

across the torch tip.

1. Check the torch consum-

ables to be sure they are 
installed securely.  Make 
sure they  are not dirty or 
greasy and are in good con-
dition.  Replace the consum-
ables if necessary.

2. Check for the presence of

high frequency at the spark
gap, located inside the Right 
Case Side Assembly panel
of the machine. The “spark”
normally will be present for
a second or two when the
torch trigger is pulled.

3. Check the high frequency 

spark gap setting. It should 
be at .060” (1.5mm). DIS-
CONNECT

ALL

INPUT

POWER BEFORE ADJUST-
ING THE HIGH FREQUEN-
CY CIRCUIT.

4. If the high frequency “spark”

is present at the spark gap
located inside the panel, the
torch and cable assembly 
may be faulty.

1. If the high frequency 

"spark" is present at the 
spark gap located inside the 
panel, the torch and cable 
assembly may be faulty. 
Perform the Torch, Torch 
Cable Assembly, and 
Internal Trigger and Safety 
Circuit Tests.

2. If the high frequency 

"spark" is not present at the 
spark gap, check that pilot 
control relay (CR2) contacts 
close when the torch trigger 
is pulled.
a. If pilot control relay 
(CR2) contacts close when 
torch trigger is pulled, per-
form High Voltage 
Transformer Test.
b. If pilot control relay 
(CR2) contacts DO NOT
close, test for 115 VAC 
between leads #36 and #31 
on pilot control relay (CR2) 
when the torch trigger is 
pulled.  If 115 VAC IS pre-
sent, pilot control relay 
(CR2) could be faulty. 
Replace.
If 115 VAC IS NOT pre-
sent, check plug J10 on 
Control Board and asso-
ciated wires for loose or 
faulty connections.  If none 
are found, Control Board 
could be faulty.  Replace.

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln
Electric Service Department for technical troubleshooting assistance before you proceed call 216-383-2531 or 1-800-833-9353.

Observe Safety Guidelines

detailed in the beginning of this manual.