TM 9-4940-568-20
2-102
Table 2-17. ARC Welder Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. ERRATIC OR IMPROPER WELD OUTPUT.
Loose welding cable connections.
Tighten all welding cable connections.
Incorrect welding cable size.
Use proper size and type of cable.
Improper input connections.
Use proper input connections.
Poor electrode condition.
Replace electrode.
If using a wire feeder, ensure that the wire is feeding at a consistent rate.
Adjust wire feeder.
If is GTAW mode, check the condition of the tungsten electrode.
Use the recommended 2% Thoriated tungsten.
In GTAW mode, incorrect argon gas flow.
Verify that argon gas flow is correct.
Incorrectly set PROCESS SELECTOR switch.
Verify the PROCESS SELECTOR switch is set to match the type of welding process being
conducted.
Wrong welding polarity.
Verify output torch connections.
