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10. TIG mode unstable Arc.
11.The arc weld has no output
12. Arc start difficult or often break
off in arc welding.
13. Can not display the amperage
or voltage or faulty display.
7.02
Solving Problems Beyond the Welding Terminals
The general approach to fix gas metal arc welding (GMAW) problems is to start at the wire spool then
work through to the MIG gun. There are two main areas where problems occur with GMAW:
a) Porosity
When there is a gas problem the result is usually porosity within the weld metal. Porosity always stems
from some contaminant within the molten weld pool which is in the process of escaping during solidification of
the molten metal.
Contaminants range from no gas around the welding arc to dirt on the work piece surface.
Porosity can be reduced by checking the following points:
l
Gas cylinder contents and flow meter
Ensure that the gas cylinder is not empty and the flow meter is correctly adjusted to 15 liters per
minute (0.5 cubic feet per minute)
l
Gas leaks
Check for gas leaks between the regulator/ cylinder connection and in the gas hose to the power
supply.
l
Internal gas hose in the power supply
Ensure the hose from the solenoid valve to the MIG gun adaptor has not fractured and that it is
connected to the MIG gun adaptor.
l
Welding in a windy environment
Shield the weld area from the wind or increase the gas flow.
DYNA POWER 350CV、503CV、500CV、630CV、630HCV Operating Manual
1. Wrong tungsten electrode.
2. TIG
torch
bad
damage.
3. Argon flow control is improper,
not pure argon gas.
4. TIG torch gas hose is cut.
5. TIG
torch
wrong
(negative for TIG torch).
6. Control PCB damage.
1. The
function
incorrectly.
2. Three phase commutate bridge
damage.
3. IGBT damage.
4. Drive board damage.
1. The weld current setting too
low.
2. The power supply voltage is too
low or the cable is too thin.
3. Control Board damage.
Display Board damage.
Table 8
- 20 -
1. Choose right tungsten.
contact
or
2. Replace TIG torch.
3. Replace argon gas capacity.
4. Replace TIG torch.
position
5. Reconnect.
6. Replace control PCB.
switch
set
1. Correctly set the function switch.
2. Replace.
3. Replace.
4. Repair or replace.
1. Increase.
2. Replace.
3. Replace.
Repair or replace.
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