Westweld NB-350MK, Manual Instruction

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18
7.Deformation on nozzle;
8. Current and voltage can
not be adjusted
1.The potentiometer of current and
voltage is damaged;
2.The PCB is damaged.
1.Replace potentiometer;
2.Repair or replace the PCB;
9
．
Wire is feed without
pressing torch
1.Short circuit on switch;
2.Manual wire feeding button is
damaged;
1.Repair or replace welding torch;
2.Replace manual wire feeding button;
Faults Reasons Eliminating methods
10
．
The gas heater frosts
1.Poor contact on heater plug seat;
2.Open circuit on heater resistance wire;
1.Check the plug and socket of heater;
2.Repair or replace heater;
11
．
There is too much
spatter or the welding
current is not stable
1.Open circuit on three phase power;
2.Wrong welding standard;
3.Bad electrode wire quality;
4.There is grease dirt or rust on work
piece or electrode wire;
5.The distribution voltage fluctuates
heavily;
6.The electrode wire sticks out too long;
7.The diameter of wire slot is not same as
electrode wire;
8.Something wrong with the shield gas;
9.Wrong model of contact tip or the tip
hole is damaged;
10.Too much dirt in wire feed pipe;
11.Ground wire gets flexible;
1.Check three phase supply power, make
sure supply voltage fit the required voltage;
2.Adjust the welding standard;
3.Replace electrode wire;
4.Clean the grease dirt or rust;
5.Make sure the fluctuation range of
distribution voltage is in 380 VAC±15%;
6.The stick out length should be 10 times
more than wire diameter;
7.Replace the wire slot;
8.Use high purity gas;
9.Replace contact tip;
10.Clean the wire feeding pipe;
11.Fasten the ground wire;