Welding inverters are quite reliable equipment, containing a broad range of protections. However, there are a number of recommendations, implementation of which will minimize the probability of failure and make comfortable performing of welding works.
One of the most important recommendations - when working do not put the device on the ground. Cooling fan, which is part of any inverter, begins to suck in dust, and dust, especially metal from the angle grinder, metal being cut or concrete, is the main enemy of inverter. If the work is often done in dusty places, it is recommended to occasionally remove the metal casing and purge internal components with compressed air (compressor) under a pressure of no more than 4 units and/or perform the cleaning with a soft brush. In addition, these actions contribute to an increase in heat transfer and improvement of welding inverter cooling, which, in turn, will have a positive effect on the duration of work until the thermal protection is turned on. This is especially true in the southern regions with high ambient temperatures.
A recommendation is associated with this factor - avoid blocking the ventilation holes and prevent installation of a working inverter closer than 30 cm from the wall or obstacles to air circulation. Operation of the welding inverter is strictly prohibited if one or both (if there are two of them) fans do not work.
When equipment is brought into a warm room from outside with a cold air it is imperative to wait in a warm room for two hours and only then plug it into the power network.
At the end of the work, it is not necessary to immediately turn off the inverter - after a hasty shutdown, internal components continue heated and for some time are warmed up. It is necessary to allow the inverter to run idle (3-5 minutes) and wait for cold air to appear at the outlet of the ventilation holes before turning off the unit.
When performing work, monitor reliability of the connection of the contact of cables in the contact sockets. Considering what current is applied to them - any contact disturbance causes a strong arcing in this place, leading to even greater contact disturbance. It is recommended to use only plant (supplied with welding) welding cables, and if you change length of the cables, then make such a change insignificant. Excessive increase in cable length leads to current losses and changes in the characteristics of the device, since the cables are part of the internal electrical circuit. The same applies to the contact points of the supply wire - it is necessary to monitor the reliability of the contact in the plug-socket connection and, if necessary, to use extension cables with a cross section of at least 2.5 mm2 (for a copper conductor) and a length of no more than 10 meters (unused wire should not be coiled in ring).
All data on the performance of welding machines are given at the rate of 220-230V in the supply power network. And even if your device is designed to work in the range of 170-270V, its performance at 170V will be significantly lower than at 220V, i.e. to compensate for this, the welding current will need to be set higher.
It is necessary to avoid moisture ingress inside the apparatus - if this happens, dry it.
Winter storage of welding equipment in damp garages and basements is not recommended.