6
Maintenance and care
6/1
6.1
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.
6.2
Cleaning
Before cleaning, carefully disconnect the machine from the mains. PULL OUT THE MAINS PLUG.
(Switching off or pulling out 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 power source 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.
6.3
Repetition Test conforming to E VDE 0544-207, conforming to the
German Ordinance on Operational Safety
In addition to the regulations on the repetition test mentioned here, the relevant laws and
regulations in the country of use must be observed.
The repetition test must be conducted in accordance with E VDE 0544-207 “Repetition Test on Arc
Welding Equipment”. The draft standard summarises all the necessary test points specifically for
welding machines as already cited together in the VDE 0702 “Repetition Test for Electrical
Devices”, with the addition of special application notes and different limit values.
Unfortunately, many test devices for VDE 0702 are not completely suitable due to the special
conditions in inverter arc welding machines!
Recommendation: Ask your test engineer whether he is performing the test in accordance with E
VDE 0544-207, the measuring equipment conforms to VDE0404-2 and the frequency response is
being evaluated in accordance with DIN EN 61010-1 Appendix A – Measuring Circuit A1. Have this
confirmed in writing if necessary.
EWM as a manufacturer has specified a separate test device and provides its EWM dealers with
the necessary support to conduct a repetition test to E VDE 0544-207 correctly.
If the repetition test is not conducted in accordance with the standards and / or not at the
prescribed intervals, the right to claim under the warranty lapses!
The following description of the repetition 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 read E VDE 0544-207.
