Troubleshooting steps
Verify input voltage, check power stability, verify wiring connections
Welding Equipment Codes
ERR-03 – Input Voltage Fault
Input voltage fault detected
Details
The input voltage is incorrect or unstable.
Error typeerror
MeaningInput voltage fault
Typical causesWrong voltage, unstable power, wiring issue
SolutionsVerify input voltage, check power stability, verify wiring connections
Severityhigh
Catalog references
Where this appears
Lincoln ElectricERR-03
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FAQ
Common questions
What voltage is needed?
Check welder nameplate for required input voltage specifications.
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