24
SC1100 Troubleshooting
Problem
Possible Cause
Fix
Unit stops welding, Over-
Temp LED is on.
Over heating.
1.
Allow unit to cool until OverTemp LED turns off.
2.
Slow down welding rate (fewer studs per minute).
3.
Any fault in the OverTemp Thermostat Circuit will shut
the system down.
Weld output erratic or weak.
Adjustments or
settings.
1.
Check welding hand tool set up, lift, plunge, and accesso-
ry adjustments.
2.
Check ALL weld current carry leads and connections, in-
cluding grounds.
3.
Test the power loop by making welds on a test piece us-
ing only the starter cable set.
4.
Test 3 phase power to control contactor.
5.
Check taps (if applicable) on main transformer.
Weld gun lifts, but does not
plunge.
Gun maintenance.
If this happens, it is most likely binding inside of the gun. Per-
form routine gun maintenance or replace gun if needed.
All tests should be performed by a qualified person.
Always turn off power to the welder before working on or testing components within the welder.
Contact your TRU
-
WELD Equipment Representative for replacement parts and for servicing your
welding equipment.
