Arc is not stabile
and too much
splashing occurs.
Contact nozzle and wire feed
reels is not compatible with the
used wire.
Check the contact nozzle and wire
feed reels, change if necessary.
REASON
SOLUTION
PROBLEM
There is strain in any point of
the torch.
Check wire guides and spiral. Clean
or replace if necessary. Do not too
much bend the torch cable.
One of the phases is missing in
supply voltage.
Check the mains phases.
Diode gropu is faulty.
Change the diode group.
There is incompatibility between
wire feeding speed and voltage value.
Check the wire feeding speed and
voltage value.
Welding current
cannot be set correctly.
Current setting potentiometer is
faulty.
Change the potentiometer.
Control board (PC-board) is faulty. Contact with technical service.
There is no shielding
gas flow.
Gas hose is not connected or
there is disconnection in the hose.
Check the hose and gas connection
system. Tighten the connections.
Replace the hose if necessary.
Gas hose is crushed or blocked.
Check the gas connection hose.
Gas solenoid is faulty.
Clean the electronic valve or replace
with the new one.
Wire is curled within
torch, bended in
feed reels or inlet
guide.
End of the wire stucked to
contact nozzle.
Change the contact nozzle and if
necessary change the nozzle.
Inlet guide is too away from the
wire feed reels or guides are
blocked.
Check the distance. Perform
necessary adjustments. Clean the
guides.
Inlet /outlet guides and wire
feed reels are not on the
same axis.
Perform the necessary changes to
have them on the same axis.
Inner diameters of inlet/outlet
guides are too wide or too narrow.
Change inlet/outlet guides.
Power indicator lamp
doesn t light upon
'
machine start.
Power indicator lamp
lights but contactor
doesn t operate.
'
Thermal protection is activated.
Leave the machine to cool down.
There is no supply voltage.
Check the mains voltage.
On/Off switch is faulty.
Change On/Off switch.
Power indicator lamp is faulty
Change the power indicator lamp.
Expressweld MasterMIG 500W
There is noise in
water pump and there
is no water flow.
Water hoses are blocked.
Close the water pump. Remove the
hoses between power unit and wire
feeder unit and clean.
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