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4.2. Troubleshooting
•
Before arc welding machines are dispatched from the factory, they have already been debugged accurately.
So forbid anyone who is not authorized by our company to do any change to the equipment!
•
Maintenance course must be operated carefully. If any wire becomes flexible or is misplaced, it maybe
potential danger to user!
•
Only professional maintenance personal who is authorized by our company could overhaul the machine!
•
Guarantee to shut off the arc welding machine's power before turn on the outline of the equipment!
•
If there is any problem and has no the authorized professional maintenance personal of our company,
please contact local our company agent or the branch company!
If there are some simple troubles of SMART 200 welding machine, you can consult the following overhauling chart:
Troubles
S/N
Turn on the power source,
1
and fan doesn't work, but
the power light is not on.
Turn on the power source,
2
and the power light is on, but
fan doesn't work.
Turn on the power source,
3
and the power light is not on
and fan doesn't work.
No no-load voltage output
4
(MMA)
Arc can not
5
be ignited
(TIG)
HF striking arc can not be
6
stopped
7
No gas flow (TIG)
When welding, it is hard to
8
strike arc or easy to
stick.(MMA)
9
The welding current can not
be adjusted
10
The penetration of molten
SMART 200 TIG PULSE
The power light damaged or connection
is not good
The transformer of power is broken
Control PCB failures
There is something in the fan
The start capacitor of fan damaged
The fan motor damaged
No power supply input
The fuse on the rear panel is broken
The machine is damaged
The welding cable is not connected with
the two output of the welder.
The welding cable damaged.
The earth cable connected unstably.
There is
The welding cable is too long.
spark on the
There is oil or dust on the workpiece.
HF igniting
The distance between tungsten electrode
board.
and workpiece is too long.
The distance between the discharger is
too short.
The malfunction of the welding gun
switch.
Check Pr2
Gas cylinder is close or gas pressure is
low
No controlling electromagnetic valve
signal
Something in the valve
Electromagnetic valve is damaged
Connector is loose or connection is not
good.
There is oil or dirty on the workpiece.
The welding current potentiometer on the
front panel connection is not good or
damaged
The control signal of the pulse board is
wrong
The welding current is adjusted too low
Reasons
Solution
Test and repair the inside circuit of
power light
Repair or change the transformer
Repair or change the control PCB
Clear out
Change capacitor
Change fan
Test the power supply input
Change the fuse (3A)
Check the main circuit and the
PCBs(Pr1)
Connect the welding cable to the
welder's output.
Repair or change it.
Check the earth cable.
Use an appropriate welding cable.
Check and remove it.
Reduce the distance (about 3mm).
Adjust this distance (about 0.7mm).
Check the welding gun switch,
control cable and aero socket.
Repair or change it.
Open or change the gas cylinder
Repair or change the pulse board
Remove it
Change it
Check and screw it.
Check and clear it.
Repair or change the potentiometer
Repair or change the pulse board
Increase the welding current
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