Jasic MIG 200 PFC, Руководство пользователя

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Page 69
TIG
No current is
output when
torch trigger is
pressed
Some Lift TIG modes
allow welding to end
when the torch trigger
is pressed
Release the torch trigger and start over
Welding circuit is
blocked Check the welding circuit and reconnect
it
Rapid tungsten
electrode
burnout
Welding torch and
earth clamp are
connected to the
wrong polarity
Switch two plug positions
Blackening of
solder joints
Welds are not
effectively protected
and become oxidized
· Ensure that the valve of argon cylinder
is open and there is enough pressure.
Generally, if the cylinder pressure is
lower than 0.5 MPa, it must be refilled.
· Check whether the argon flow rate is
normal. You can select the flow rate
according to the welding current
condition, but too low a flow rate may
lead to insufficient shielding gas to
cover all weld joints. It is suggested that
the argon flow rate be no less than
5L/min, no matter how small the
current.
· Check whether the gas path is leaking,
or whether the gas purity is too low.
· Check whether there is strong ambient
air flow in the environment.
Hard to start arc
Arc is easily
interrupted Poor quality or
serious oxidation of
tungsten electrode · Replace tungsten grade with better
quality.
· Grind off the tungsten oxide layer.
Unstable current
when welding
The voltage of the
power grid fluctuates
seriously or the joint
contact with the
power grid is poor.
Serious interference
from other electrical
equipment.
· Check whether the power grid is
normal and connect the power
connector.
· Use different power cords to connect
equipment that could seriously interfere
with welder.
Other malfunction
Please contact the maintenance
personnel of Shenzhen JASIC
Technology Co., Ltd.