Fault Tracing; Possible Faults - ESAB A2 Multitrac Betriebsanweisung

GB
7

FAULT TRACING

Equipment
Instruction manual control box PEG 1, order no. 443 392.
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Check
that the power supply is connected for the correct mains supply
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that all three phases are supplying the correct voltage (phase se-
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quence is not important)
that welding cables and connections are not damaged
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that the controls are correctly set
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that the mains supply is disconnected before starting repairs
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POSSIBLE FAULTS

1. Symptom
Cause 1.1
Action
Cause 1.2
Action
2. Symptom
Cause 2.1
Action
Cause 2.2
Action
Cause 2.3
Action
3. Symptom
Cause 3.1
Action
Cause 3.2
Action
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Current and voltage readings show large fluctuations.
Contact jaws or nozzle are worn or wrong size.
Replace contact jaws or nozzle.
Feed roller pressure is inadequate.
Increase pressure on feed rollers.
Wire feed is irregular.
Pressure on feed rollers incorrectly set.
Adjust pressure on feed rollers.
Feed rollers wrong size.
Replace feed rollers.
Grooves in feed rollers are worn.
Replace feed rollers.
Welding cables overheating.
Poor electrical connection.
Clean and tighten all electrical connections.
Cross--sectional area of welding cables too small.
Use cables with a larger cross--section or use parallel cables.
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