Jasic ARC200PFC - Common Malfunction Analysis (LIFT TIG)

Page 35
Other failures
Please contact the maintenance
personnel of
Shenzhen JASIC Technology CO., Ltd.
Elimination of general problems in LIFT TIG welding
Symptom
Reasons
Measures taken by users
After startup, the fan does
not run, or the speed is
abnormal
The air
temperature is too
low, or the fan is
damaged
When the temperature is too low, leave the
machine work for while, wait for the
temperature in the machine to rise and fan
to rotate normally. If it does not work,
replace the fan.
LIFT TIG
welding
No current
output when
the tungsten
electrode is
shorted with
the workpiece
Welding circuit is
blocked
Check the welding circuit and reconnect it
Rapid
tungsten
electrode
burnout
Welding torch and
earth cable are
connected to the
wrong polarity
Switch two plug positions (torch to
negative polarity)
Blackening of
weld joints
Welds are not
effectively
protected and
oxidized
(1) Make sure that the valve of argon
cylinder has been opened and there is
enough pressure. Generally, if the
pressure in the cylinder is lower than 0.5
MPa, it is necessary to refill the cylinder.
⑵ Check whether the argon flow rate is
normal. You can choose different flow rates
according to different welding current
conditions, 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 should no less than 5L/min no
matter how small the current is.
(3) Check whether the gas passage is
leaking, or whether the gas purity is too
low.
(4) Check whether there is strong ambient
air flow in the environment.
Hard to start
arc
Arc is easy to
be interrupted
Poor quality of
tungsten electrode
or serious
oxidation of the
tungsten electrode
(1) Replace tungsten electrode with higher
quality.
⑵ The tungsten is contaminated
(3) Increase the post flow time to avoid
tungsten oxidation.