Lincoln Electric SVM104-A ユーザーズマニュアル

Observe Safety Guidelines
detailed in the beginning of this manual.

No LEDs light when the
ON/OFF Power Switch is turned
"ON".  Machine is dead.  Fan
runs normally.

The "MACHINE ON" LED is lit
and the "SAFETY" LED is lit.

1. Make sure input voltage 

corresponds to machine 
nameplate voltage.

2. Make certain the reconnect 

panel is configured properly 
for input voltage being 
applied to PRO-CUT 60 

1. Push the "SAFETY RESET"

button, the LED should go 
out.  This circuit sometimes 
trips on power up or because 
of "noise".  If the circuit can 
be reset, it is OK to continue.

2. Maintain proper stand-off

while cutting (.10” to .15”).
Too long a stand-off may 
cause nuisance safety trips.

3. Check torch consumables. 

Replace if needed.

4. Replace the torch and cable

assembly.

1. Check plug J7 (located on 

the Control Board) and 
associated wires for loose 
or faulty connections.

2. Check Plug J9 on Status 

Board and J8 on Control 
Board for loose or faulty 
connections

3. Test for 24 VAC between 

leads C2 and H6 (plug J7) 
on Control Board.  Refer to 
wiring diagram.
a.  If the 24 VAC IS NOT
present or voltage is very 
low, the main transformer 
could be faulty.  Perform 
Main Transformer Test.
b.  If the 24 VAC is 
present at leads C2 to H6, 
the Control Board could be 
faulty.  Replace.

1. The torch and cable 

assembly may be faulty. 
Perform Torch, Torch Cable 
Assembly, and Internal 
Trigger and Safety Circuit 
Tests.

2. Check for continuity (zero 

ohms) between leads #336 
and #337 from the torch 
4-pin connector on the 
machine to plug J5 on the 
Control Board.  Refer to 
wiring diagram.

3. Check Pilot bleed resistor 

R3. Normal is 40 ohms. 
See wiring diagram.

4. The control board could be 

faulty.  Replace.

5. Perform Main Transformer

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.