Applicable Systems
Power Wave ACDC1000SD
Symptoms
The welder displays a Voltage Lockout indication (LED blinks), indicating an internal auxiliary undervoltage condition has been detected.
Possible Causes
- Input mains voltage dropped below the rated minimum for the welder
- Input power cable too long or undersized causing voltage drop
- Internal auxiliary power supply circuit fault
- Mains power supply unstable with frequent voltage dips
Troubleshooting Steps
- Step 1: Check input mains voltage at the welder input terminals
Voltage must be within the rated range printed on the nameplate - Step 2: Verify input cable size and length meet specifications
Cable must be sized to prevent excessive voltage drop under load - Step 3: Power cycle the welder by turning off then on the mains switch
Welder should restart normally if voltage is within range - Step 4: If voltage is consistently low, install a voltage stabilizer
Stabilizer must handle the welder's maximum input current
How to Reset
To reset: 1) Verify input voltage is within rated range. 2) Turn OFF the Mains Switch. 3) Wait a few seconds. 4) Turn ON the Mains Switch to restart. If the error remains, maintenance is required.
Frequently Asked Questions
- Q: What input voltage triggers Voltage Lockout?
Voltage Lockout triggers when the internal auxiliary voltage drops below the threshold, typically when input voltage falls below 85% of rated voltage.
- Q: Can I continue welding with Voltage Lockout blinking?
No. The welder disables output when Voltage Lockout is detected. Input voltage must be corrected before resuming operation.
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Source: Lincoln Electric Invertec 135S/150S/170S Operator Manual, Error Condition List
Category: Welding
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