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19
The wire jams
or entangles
between the
drive rolls and
the
torch
infeed
wire
guide
Wrong current nozzle diameter
Replace it
wrong roller groove alignment
Align it
Obstructed or clogged sheath
Remove and clean
Note: All repair work must be done by qualified personnel.
Disconnect the power input cable from the mains supply before replacing cables or before removing the
unit covers. The machine is equipped with a thermostat that shuts the machine down when the power
source overheats. After the thermostat intervenes, let the power source cool down for several minutes
before resuming welding operations.
The troubleshooting table lists troubles, causes and remedies for those troubles that occur most commonly.
Experience has shown that many fatal accidents originated from servicing improperly executed. For this
reason, a careful and thorough inspection on a serviced welding machine is just as important as one carried
out on a new welding machine.
Furthermore, in this way producers can be protected from being held responsible for defects stemming
from repairs not carried out by the manufacturer.
After rewinding the transformer or the inductance, the welding machine must pass the applied-voltage test
in accordance with indications of the international standard.
If the servicing is not done by the manufacturers, the repaired welding machines which underwent
replacements or modifications of any component shall be marked in a way such that the identity of the
person having serviced it is clear.
After making repairs, take care to re-order the cables so that there is sure to be insulation between the
primary and secondary sides of the machine. Make sure that the wires cannot come into contact with
moving parts or parts that heat during operation. Replace all clamps in their original positions on the
machine, to prevent a connection between the primary and secondary circuits if a conductor accidentally
breaks or disconnects.
Summary of Contents for AE7022
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