YATO YT-81352, Руководство пользователя, Страница: 19 / 23

If there are some simple troubles of YT-series welding machines, you can consult the following
overhauling chart:
S/N
Troubles Reasons Solutions
1
Turn on the power source, and fan works,
but the power light is not on.
The power light damaged or
connection is not good
Test and repair the inside
circuit of power light Pr3
Power PCB failures
Repair or change power PCB
Pr2
2
Turn on the power source, and the power
light is on, but fan doesn’t work
There is something in the fan Clear out
The fan motor damaged Change fan motor
3
Turn on the power source, and the power
light is not on, and fan doesn’t work
No input voltage Check whether there is input
voltage
Overvoltage (Input voltage is
too much or not) Check input voltage
4 No no-load voltage output
There is trouble inside the
machine
Check the main circuit, Pr1
and Pr2
5 No current output in the welding
Welding cable is not connected
with the two output of the
welder.
Connect the welding cable to
the welder’s output
Welding cable is broken
Wrap, repair or change the
welding cable
Earth cable is not connected or
loosen
Check the earth clamp
6
Not easy to start arc in the welding, or easy
to cause sticking
The plug loosen or connect not
well
Check and tighten the plug
Oil or dust covered the
workpiece
Check and clear out
MMA/TIG welding selection
is wrong
Selecting the MMA welding
7 The arc is not stable in the welding process The arc force is too small Increase the arc force
8
The welding current can not be
adjusted
The welding current
potentiometer in the front
panel connection not so good
or damaged
Repair or change the
potentiometer
9
The penetration of molten pool is not
enough(MMA)
The welding current adjusted
too low
Increase the welding current
The arc force adjusted too
small
Increase the arc force
10 Arc blow
Airflow disturbance Use the shelter from airflow
The electrode eccentricity
Adjust the electrode angle
Change the electrode
Magnetic effect
Incline the electrode to the
opposite way of the magnetic
blow
Change the position of earth
clamp or add earth cable in
the two side of workpiece
Use the short arc operation
17