1. No output

Cause of failure: Mainly the primary coil or the secondary coil is open.

Elimination method: use direct observation method or multimeter measurement method to detect the disconnection point, after finding the disconnection point, use welding or screw to fix the connection, and add insulation.

2. Welding current is too small

The cause of the failure: the welding cable is too long; the welding cable is rolled into a disk shape, which causes the inductance to be too large, and the welding cable is in poor contact with the terminal.

Remedy: reduce the length of the cable or increase the cross-sectional area of the cable core, straighten the cable as far as possible so that it does not bend, so that the cable wire and the terminal are in good contact.

3. Electric welding machine shell

The cause of the fault: the primary or secondary coil touches the shell, the power cord touches the shell, the welding cable touches the shell, the shell is poorly grounded or not grounded.

Remedy: Eliminate the phenomenon of shell bumping, connect the ground wire, and ground the shell well.

4. During the welding process, the movable iron core has strong vibration

Cause of failure: The brake screw or spring of the movable iron core is loose, and the moving mechanism of the iron core is damaged.

Remedy: tighten the brake screw or adjust the tension of the spring, and repair the moving mechanism of the iron core.