Common Fault Analysis:
1. Magnetic Blowing:
When severe magnetic deflection occurs, adjusting the position of the ground wire connection to the opposite side of the magnetic deflection direction is often an effective solution. However, it's crucial to ensure that the connection point is positioned correctly to avoid exacerbating the issue.
2. Arc Difficulties:
- Incorrect polarity: Using alkaline electrodes requires reverse polarity; otherwise, it may lead to electrode adhesion or arc interruptions.
- Incompatible welding current: Ensure the welding current aligns with the recommended range for your electrode.
- Oily surfaces: Clean the workpiece thoroughly before welding.
- Poor ground wire contact: Inspect and tighten the ground wire connections.
- If none of the above apply, measure the no-load voltage at the welding machine’s output terminals.
- Remote and near switches set to "remote control" mode without the remote control box installed could also cause issues.
3. Low No-Load Voltage:
- Circuit board malfunction.
- Missing phase or incorrect phase sequence in the main circuit.
- Damaged thyristor in the main circuit.
- Poor engagement of AC contactors.
4. Unstable Arc:
- Rusty or damp welding rods can destabilize the arc.
- Faulty thyristors might cause irregularities.
- Excessive thrust current could disrupt the arc stability.
5. Current Offset:
- Fault in the P board.
- Fault in the current potentiometer.
- Incorrect positioning of the far and near switches.
6. No No-Load Voltage upon Power-Up:
- Fault in the P board.
7. Circuit Breaker Trips After Turning On:
- Measure the resistance at the output end to diagnose potential problems in the main circuit. Check if the fan is stuck or if the thyristor module is damaged.
In addition to these points, it's important to regularly inspect and maintain your equipment. Always refer to the manufacturer's guidelines for troubleshooting specific issues. If problems persist, consider reaching out to professional technicians or support teams for further assistance. Remember, safety should always be a top priority when dealing with electrical systems and welding equipment.
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