MG057-2 SERVISNÍ MANUÁL / SERVICE MANUAL ALFIN 281 W page 11
ALFA IN a. s. ©
SERVISNÍ TECHNICKÁ DOKUMENTACE
machine
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
5
No current output in the welding
Earth cable is not connected
or loosen
Check the earth clamp
The plug loosen or connect
not well
Check and tighten the plug
Oil or dust covered the
workpiece
Check and clear out
6
Not easy to start arc in the welding, or easy
to cause sticking
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
The welding current adjusted
too low
Increase the welding current
9
The penetration of molten pool is not
enough(MMA)
The arc force adjusted too
small
Increase the arc force
Airflow disturbance
Use the shelter from airflow
Adjust the electrode angle
The electrode eccentricity
Change the electrode
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
10
Arc blow
Magnetic effect
Use the short arc operation
Over
welding
current
Induce the welding current
output
Over heat
protection
Working
time too
long
Induce the duty cycle (interval
work)
11
The alarm light is on
Over current
protection
Unusual
current in
the main
circuit
Test and repair the main circuit
and drive PCB s/n 5
5.
KONTROLA SILOVÉ PCB
CHECKING THE POWER PCB