WeldKing COOLTIG220 - Page 36

Manual no. WDT90100 Page 33
CoolTig - 220
Control circuit
failure
Check, repair, replace
circuit board
Welding cable size
or type is not proper
See table 2.3
Electrode selection
is not proper
See Table 3.2
the work piece
surface
contaminated by oil
Clean the workpiece
surface
Poor contact inside
the gun
Check, repair, replace
Rectifier failure Check, replace
Output reactor
failure
Check, replace
Output capacitor
failure
Check, replace
Remote control
failure
Check resistance and
connections for remote
Amperage control
potentiometer
16 Tungsten electrode
oxidizing( not bright) after
welding
Gas shield
inadequate
check nozzle
Gas not pure Check if there is water
in torch and repair.
Check and tight all gas
fitting