Common faults and maintenance methods of DC invert manual arc welding machineWho has the relevant circuit diagram?For example, the market style: ZX7-200, MMA-160, ARC-200 and other modelsWhat does the letter "ZX7 MMA ARC" mean?Are they all invert DC manual arc welding machines?
ARC is the meaning of identifying arc weldingMMA manual metal arc manual metal arc, that is, electrode arc weldingInverter welding machine with ZX7 DC down characteristic
TroubleshootingThe switch power supply indicator is not on, the fan does not turn, no welding output, 1, confirm the power switch closed.2. Make sure that the input cable is connected to the power supply.Power indicator light, fan does not turn, no welding output 1, may be wrong input on the 380V power supply, causing over-voltage protection circuit start, change to 220VPower on, you can reboot.2, 220V instability (power input line or too long) or input lines overlap in the grid, resulting in over-voltage protection circuit starting, increase input line grid line diameter; the fastening input line node, this phenomenon is shut down 5-10 minutes after the restart recovery.3, a short time continuous open and close power switch, cause over-voltage protection circuit start, shutdown 5-10 minutes later, restart, you can return to normal.4. The wire between the power switch and the power board is loosened and re tightened.5 、 the 24V relay on the power board is not attracted or damaged, check the 24V power supply and relay, and the relay can be replaced by other relays of the same type.When the fan is turned and welded, the output current is unstable or not controlled by potentiometer. When the current is large, it is small 1, potentiometer 1K, and the quality is not good. Should be replaced.
Looking for manufacturers, each manufacturer's circuit is not exactly the same.
