Telwin INVERSPOTTER 13500 SMART AQUA Manuel D'instructions page 10

electric shock due to direct contact with live parts and/or injury due to direct contact
with moving parts.
Periodically and as frequently as required by the use and environmental conditions,
inspect inside the spot welder and clamp and remove the dust and metal particles that
have deposited on the transformer, diode module, power terminal board, etc. using a
blast of dry compressed air (max. 5 bar).
Do not direct the jet of compressed air onto the electronic circuit board; if necessary
clean with a very soft brush or suitable solvents.
At the same time:
- Make sure the wiring does not show signs of insulation damage or loose-oxidised
connections.
- Make sure the screws that connect the transformer secondary with the output bars
/ wires are tight and that there are no signs of oxidation or overheating.
8.2.1 Intervention on the GRA
In case of:
- excess need to restore the liquid level in the tank;
- excess frequency of alarm 7 activation;
- liquid leaks;
you should proceed to check for any problems inside the cooling unit.
Always refer to section 7.2 for overall warnings and however having disconnected the
spot welding machine from the power supply mains, proceed with removing the side
panel (FIG. L).
Check there are no leaks both on connections and tubing. If liquid is leaking, replace
the damaged part. Eliminate the liquid residue possibly leaked during maintenance
and close the side panel again.
Then proceed to reset the spot welding machine using the appropriate information
indicated in paragraph 6 (Spot welding).
8.2.2 Replacing the internal battery
If the memory does not maintain the correct date and time, replace the battery
(CR2032 - 3V) found in the compartment at the back of the control panel.
When the spot welder is disconnected from the mains, remove the control panel
screws, remove the connectors and replace the battery.
WARNING! Make sure all the connectors have been connected before
returning the panel to the machine.
9. TROUBLESHOOTING
SHOULD MACHINE OPERATION NOT BE SATISFACTORY, AND BEFORE
CARRYING OUT MORE SYSTEMATIC CHECKS OR CONTACTING YOUR
TECHNICAL ASSISTANCE CENTRE, MAKE SURE THAT:
- With the main switch of the spot welder closed (pos. " I ") the display is lit; if not
the problem is in the power line (cables, plug and socket, fuses, excessive voltage
drop, etc.).
- The display does not have any alarm signals (see TAB. 1): once the alarm stops,
press "START" to re-activate the spot welding machine; check correct circulation of
the cooling liquid and, if necessary, reduce the intermittence ratio of the work cycle.
- The elements that are part of the secondary circuit (fuses – arm-holders – arms –
electrode holders – cables) are not inefficient because of loose screws or oxidation.
- The welding parameters are suitable for the work to be carried out
- 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. Band all the wires as they were before,
being careful to keep the primary high voltage connections separate from the
secondary low voltage ones.
Use all the original washers and screws when re-closing the structural work.
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