Telwin TECHNOMIG 225 DUAL SYNERGIC Bedienungsanleitung Seite 10

- Inspect the welding machine regularly, with a frequency depending on use and the
dustiness of the environment, and remove the dust deposited on the transformer,
reactance and rectifier using a jet of dry compressed air (max. 10 bar).
- Do not direct the jet of compressed air on the electronic boards; these can be cleaned
with a very soft brush or suitable solvents.
- At the same time make sure the electrical connections are tight and check the wiring for
damage to the insulation.
- At the end of these operations re-assemble the panels of the welding machine and screw
the fastening screws right down.
- Never, ever carry out welding operations while the welding machine is open.
- After having carried out maintenance or repairs, restore the connections and wiring as
they were before, making sure they do not come into contact with moving parts or parts
that can reach high temperatures. Tie all the wires as they were before, being careful to
keep the high voltage connections of the primary transformer separate from the low
voltage ones of the secondary transformer.
Use all the original washers and screws when closing the casing.
16. TROUBLESHOOTING
IN CASE OF UNSATISFACTORY FUNCTIONING, BEFORE SERVICING MACHINE OR REQUESTING
ASSISTANCE, CARRY OUT THE FOLLOWING CHECK:
- Check that when general switch is ON the relative lamp is ON. If this is not the case then
the problem is located on the mains (cables, plugs, outlets, fuses, etc.)
- There is no alarm signalling intervention of the thermostat safeguard, over or undervoltage
or short-circuit.
- Check that the nominal intermittance ratio is correct. In case there is a thermal protection
interruption, wait for the machine to cool down, check that the fan is working properly.
- Check the mains voltage: if the value is too high or too low the welding machine will be
stopped.
- Check that there is no short-circuit at the output of the machine: if this is the case
eliminate the incovenience.
- Check that all connections of the welding circuit are correct, particularly that the work
clamp is well attached to the workpiece, with no interferring material or surface-coverings
(ie. Paint).
- Protective gas must be of appropriate type and quantity.
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