
11
11.0 POSSIBLE WELDING DEFECTS
DEFECT CAUSES SUGGESTIONS
POROSITY Acid electrode on steel with high
&
./
./!
6
Move edges to be welded closer
7!
!!
CRACKS 7!1
3
Cleaning workpieces before
welding is an essential method of
!
LIMITED
PENETRATION
!
9!
$
Electrode inclined in position
Make sure operating parameters
are regulated and improve prepa-
!/
HIGH SPRAYS & 7/
PROFILE DEFECTS .
Pass rate is not related to opera-
Follow basic and general welding
ARC INSTABILITY Check condition of electrode and
!
ELECTRODE MELTS
OBLIQUELY
&
7!
$
Connect two earth wires to opposi-
!/
INCONVENIENCE CAUSE REMEDY
SPARK WILL NOT
START
2
'X2
X/
X
NO OUTPUT VOL-
TAGE
Overheated unit, yellow LED lit
Overvoltage protection interven-
&4
Overcurrent protection interven-
!&4
'
'X2
.<
X/!$
@
Reset the unit by turning it off and
@'-
esn’t revert working contact after
X
X
WRONG OUTPUT
CURRENT
4
Low primary power supply
X
X/!
12.0 TROUBLE SHOOTING