Maintenance and testing
General
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Item No.: 099-004833-EWM01
7
Maintenance and testing
The maintenance, cleaning and testing work described below must be conducted correctly and on
an annual basis in order to be entitled to claim under the EWM warranty.
7.1
General
Under the indicated environmental conditions and normal operating conditions, this machine is largely
maintenance-free and requires minimum care. However, a number of points should be observed to
guarantee fault-free operation of your welding machine. Among these are regular cleaning and checking
as described below, depending on the level of contamination in the environment and the usage time of
the welding machine.
Cleaning, testing and repairing of the welding machines may only be carried out by competent,
capable personnel. A capable person is one who, due to training, knowledge and experience, is
able to recognise the dangers that can occur during testing of welding power sources as well as
possible subsequent damage and who is able to implement the required safety procedures.
In the event of failure to comply with any one of the following tests, the machine must not be
operated again until it has been repaired and a new test has been carried out.
7.2
Cleaning
Before cleaning, carefully disconnect the machine from the mains. DISCONNECT THE MAINS
PLUG!
(Switching off or removing the fuse does not provide adequate insulation protection.)
Wait 2 minutes until the capacitors are discharged. Remove the casing cover.
The individual components should be handled as follows:
Power source: Depending on the amount of dust, blow out using oil- and moisture-free compressed air.
Electronics:
Do not blast electronic components or circuit boards with compressed air but instead use
suction from a vacuum cleaner for cleaning purposes.
Coolant:
Check for impurities and replace if necessary.
Caution! Mixing with other liquids or the use of other coolants voids our
manufacturer's guarantee.
7.3
Test
The test should be conducted in accordance with IEC/DIN EN 60974-4 "Arc welding equipment –
Inspection and testing during operation" in accordance with the German Ordinance of Operational Safety.
This standard is firstly, international, and secondly, specific to arc welding equipment.
The former term of repetition test has been replaced due to a change in the corresponding
standard with "Inspection and testing during operation".
In addition to the regulations on the test given here, the relevant local laws and regulations must
also be observed.
7.3.1
Test equipment
Due to the special conditions of inverter arc welding equipment, not all test equipment is suitable
for testing in accordance with VDE 0702 to the full extent!
EWM as a manufacturer offers all appropriately trained and authorised EWM sales partners the
appropriate test equipment and measuring devices conforming to VDE 0404-2, which evaluate the
frequency response conforming to DIN EN 61010-1 Appendix A – Measuring Circuit A1.
You as the user are tasked with ensuring that your EWM machines conform to the standard IEC/DIN EN
60974-4 and are tested with the relevant test equipment and measuring devices given above.
The following description of the test is only a brief overview of the products to be tested. For
details on the test points or in the event of any queries, please refer to IEC/DIN EN 60974-4.
