Alarms
24
Phenomena
Phenomena
Cause
Solution
TIG
Arc is hard to start
but easy to break.
The electrode you use is
of poor quality or is badly
oxidized.
Replace it with electrode of better quality.
TIG
Arc is hard to start
but easy to break.
The electrode you use is
of poor quality or is badly
oxidized.
Remove the oxidized layer of the electrode.
TIG
Arc is hard to start
but easy to break.
The electrode you use is
of poor quality or is badly
oxidized.
Prolong the post-flow time to avoid oxidization of the electrode.
TIG
Arc is hard to start
but easy to break.
The electrode you use is
of poor quality or is badly
oxidized.
Adjust the spark gap on the discharge board to about 1.0mm.
TIG
Unstable current
during welding
Mains voltage fluctuates
badly, or the input cable
is loosely connected with
the mains power supply.
Check the mains power supply for normal state, and reconnect the power cord.
TIG
Unstable current
during welding
There is serious
interference from other
electric appliances
Do not connect the machine to the power cord, which is connected to other electric
appliances of serious interference.
Other malfunction
Other malfunction
Contact the service centre
Type
Alarm
Automatic response
Cause
Solution
Over current
Over current LED
flashes and there
are alarm beeps.
Cut off the main circuit
permanently.
Load current is too high, or over
current protection of main
power unit occurs.
Restart the machine. If the problem remains, shut down
the machine and contact the service department.
Under voltage
Over voltage/
under voltage LED
flashes and there
are alarm beeps.
Cut off the main circuit
temporarily.
The mains voltage is low
Problem will be automatically eliminated when the mains
power supply recovers, and welding can be continued. If
under-voltage sustains, ask an electrician to check the
input power. Welding cannot be carried out until the mains
power supply recovers. If the mains voltage is normal, but
alarm beeps still exist, contact the service department
Overheating
Overheating LED
flashes and there
are alarm beeps.
Cut off the main circuit
temporarily.
Excessive work of the main
circuit
It is unnecessary to shut down the machine, but just wait
for the overheating LED to go off, and then welding can be
continued.
Summary of Contents for JT-200D
Page 26: ...Electrical schematic 7 25 ...
Page 27: ...Parts list 8 JT 200D 26 ...
Page 29: ...JT 315D 28 ...
