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7
TROUBLE SHOOTING
Equipment S
Instruction manual for A2--A6 Process Controller.
Check
that the welding power source is connected for the correct mains
S
voltage
that all 3 phases are live (phase sequence not important)
S
that the welding cables and their connections are intact
S
that the controls are in the desired position
S
that the mains voltage is disconnected before starting any
S
repairs.
POSSIBLE FAULTS
1. Symptom Current and voltage readings show large fluctuations
Cause 1.1
The contact nozzle is worn or of the wrong dimension.
Action
Replace the contact nozzle.
Cause 1.2
The gas nozzle is choked up.
Action
Clear of welding spatter.
2. Symptom Wire feed is irregular
Cause 2.1
The pressure on the feed rollers is not correct.
Action
Correct the pressure.
Cause 2.2
The feed rollers are of the wrong dimension.
Action
Replace the feed rollers.
Cause 2.3
The grooves in the feed rollers are worn.
Action
Replace the feed rollers.
3. Symptom Welding cables overheating
Cause 3.1
Improper electric connections.
Action
Clean and tighten all electric connections.
Cause 3.2
The area of the welding cables is not sufficient.
Action
Use cables of greater area or parallel cables.
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