TROUBLE SHOOTING.
TROUBLE CAUSE
REMEDY
Mains supply is
switched ON and ON-
OFF switch is put to
ON position but
welder does not come
ON.
I) Three phase supply is not
proper
ii) Mains Switch is not proper.
iii) Control fuse is blown off
I)Wait till the three phase
power is available
ii) Check for the proper
electrical contacts in the
mains switch.
iii) Replace the control fuse.
(This fuse is mounted on the
control transformer.
Equipment comes on
but the welding
current varies.
I) The mains connection is not
proper.(Loose connection)
ii) Current regulator is not
working properly. (Either the
carbon brush is weared out
OR it is not making the proper
contact.
I) Check the mains for proper
and firm connection.
ii) Replace the carbon brush.
The equipment comes
ON but the
control fuse blows.
Welding arc is not smooth and
spatter is more
I) Current setting is too high.
ii) DC polarity used for that
particular electrode is not
right.
iii) Diodes have failed.
Welding arc is sluggish.
I) Welding current is low.
ii) Loose connection
iii) Input supply is less.
the equipment give minimum
current but the current doesn’t
increases
i) Current regulator burnt OR
not working.
ii) Control transformer is
dead.
iii) Control rectifier is failed.
iv) Control fuse is blown.
