Thermal Arc Viking 210GM, Operating Manual

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Viking 210GM, 250GM
31
Welding Problems (continued)
FAULT CAUSE REMEDY
6 Weld cracking. A Weld beads too small A Decrease travel speed
B Weld penetration narrow
and deep
B Reduce current and voltage
and increase Mig torch travel
speed or select a lower
penetration shielding gas.
C Excessive weld stresses C Increase weld metal strength
or revise design
D Excessive voltage D Decrease voltage by reducing
the voltage selection
switches.
E Cooling rate too fast E Slow the cooling rate by
preheating part to be welded
or cool slowly.
7 Cold weld puddle. A Faulty rectifier unit A Have an Accredited
THERMAL DYNAMICS
Service Agent to test then
replace the faulty component.
C Loose welding cable
connection.
C Check all welding cable
connections.
D Low Primary Voltage D Contact supply authority
8 Arc does not have a crisp
sound that short arc
exhibits when the
wirefeed speed and
voltage are adjusted
correctly.
The MIG torch has been
connected to the wrong
voltage polarity on the
front panel.
Connect the MIG torch to the
positive (+) welding terminal
for solid wires and gas
shielded flux cored wires.
12.3 Power Source Problems
FAULT CAUSE REMEDY
1 Indicator light is ON but
welding arc can not be
established.
Voltage switch in
standby position .
Switch the voltage selection
switches to a welding setting.
2 Mains supply voltage is
ON. Indicator light is not
lit and welding arc can
not be established.
A
B
Primary fuse is blown.
Broken connection in
primary circuit. A
B Replace primary fuse.
Have an Accredited
THERMAL DYNAMICS
Service Agent check primary
circuit.
3 Mains indicator light is
not lit but welding arc
can be established.
Indicator light is open
circuit.
Have an Accredited
THERMAL DYNAMICS
Service Agent replace
Indicator light.