FLARING FM 155E, Operation Manual

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On the rear panel of welding machine, a screw for earth connecting would be found. It must be
ground connected with cable whose section is bigger than 6mm
2
before operation, to avoid accidents
caused by static or electricity leak.
3.5 Welding problems and solution
The phenomenon listed below may happen due to relevant accessories used, welding material,
surroundings and power supply. Pleas improve surroundings and avoid these problems..
 Arc starting difficulty. Arc interruption happens easily:
a) Examine whether grounding wire clamp contacts with the work pieces well.
b) Examine whether each joint has improper contact.
 The output current fails to reach rated value:
The deviation of power voltage from rated value may cause that the output current does no accord
with adjusted value. When the power voltage is lower than rated value, the maximum output
current may be lower than rated value.

The current can not keep stable during operation:
This situation may relate to the following factors:
a) The voltage of electric power network changes;
b) Serious interference from electric power network or other electric facilities.
 Gas vent in welds:
a) Examine whether the gas supply circuit has leakage.
b) Examine whether there is sundries such as oil, dirt, rust, paint etc. on the surface.