Welding inverters are widely used to receiving direct current and its inverting in high-frequency signal that it is required for creation of adjustable conditions of electric welding. Such devices have found application not only in the industry, but also for the fans who are engaged in welding of metal designs. At detection of small malfunctions of the inverter they can be eliminated by own efforts.
It is required to you
- - screw-driver;
- - tester;
- - vacuum cleaner;
- - soft brush;
- - soldering iron or soldering station.
Instruction
1. Get acquainted with the device and operation principle of the welding inverter. Its first necessary component – the rectifier, transforming alternating voltage to direct current. Power supply smoothes out the surge filter and arrives on the transistor scheme forming the single-phase tension of high frequency. The block of guidance system regulates work of keys through feedback signals on current and tension, transferring the inverter from one operating mode to another. In welding transformer tension goes down, and then becomes straight the block of valves and moves on electrode.
2. Uncover the body of the inverter and blow it the normal household vacuum cleaner. Then clean hard-to-reach spots with dry soft brush.
3. Begin repair with check of entrance chain. Check whether power supply in the device moves. In the presence of input voltage examine the block of short circuit protection. If necessary replace the failed safety element.
4. Check the temperature sensor and control system of power voltage. Verify the measured values with those which are specified in the application guide. In case of fault of the temperature recorder make its replacement.
5. Examine operating parts of the device. At detection of visible signs of bad soldering or darkening of mounting check the corresponding chains of the inverter tester. The bad contact can lead to overheating and the subsequent output of the device out of operation. Eliminate the noticed malfunctions: to connection propayayta, tighten the become loose connectors.
6. In case of sticking of electrode, unstable burning of arch or spraying pick up electrodes. Adjust current. Check also the section and cable length of the inverter, having compared them to data from technical documentation. In the presence of divergences replace cable.
7. If in progress of work the built-in overload indicator has lit up, it demonstrates excess of duration of loading that leads usually to overheating and spontaneous shutdown of the device. In this case switch-off the device and let's the inverter cool down. After fall of temperature of the device continue work, observing temperature condition.