Possible causes of malfunction and troubleshooting methods

Transformer overheating 1. Overload 2. Transformer winding short circuit 1. Reduce welding current 2. Eliminate short circuit faults
Welding current is too small. 1. The secondary power line is too long or too thin (the wire voltage drop is too high). 2. The secondary power line is coiled in a circle (the inductance is too high). 3. Poor contact of the secondary power line (the contact resistance at the connection is too high or poor contact with the workpiece). 1. Reduce the length or enlarge the area. 2. Eliminate the circle shape. 3. Reconnect to reduce the contact resistance.
Welding current too high or too low. 1. Insulation damage that plays an inductive role in the circuit (causing excessive current). 2. Eddy current generation in the magnetic circuit (causing current reduction). 1. Repair insulation damage. 2. Adjust the iron core gap
1. Overheating of welding power cord: 1. Overheating of the entire wire: the cross-sectional area of the wire is too small. 2. Overheating of the connection: the contact resistance at the connection is too high. 1. Replace the wire with a larger area. 2. Reconnect and reduce the contact resistance
The welding current fluctuates greatly and the moving iron core is unstable during welding. Fix the adjustment handle or moving iron core
When welding, there is a "buzzing" sound that moves the brake screw or spring of the iron core. If the brake screw or spring is too loose, tighten it or adjust the spring pressure