MG125-4 PEGAS 200 AC-DC PULSE SERVICE MANUAL
page 5
ALFA IN a. s. © 2012
SERVISNÍ TECHNICKÁ DOKUMENTACE
B-6
7.460.801
Kondenzátor kapacitní P200P
AC-DC
Capacitor P200P AC-DC
6
B-7
8.052.500
Krycí deska 2 P200AC-DC
Blanking plate 2 P200AC-DC
1
4.
TROUBLESHOOTING
S/N
Troubles
Reasons
Solutions
The power light
damaged or connection
is not good
Check and repair Pr7
The transformer of
power is broken
Repair or change the transformer
1
Turn on the power source, and fan works,
but the power pilot lamp is not on.
Control PCB failures
Repair or change the control Pr4
There is something in
the fan
Clear out
The start capacitor of
fan damaged
Change capacitor
2
Turn on the power source, and the power
pilot lamp is on, but fan doesn’t work
The fan motor
damaged
Change fan
No power supply input
Check whether there is power
supply
3
Turn on the power source, the power pilot
lamp is not on, and fan doesn’t work
The fuse inside the
machine damaged
Change it (3A)
4
The number on the display is not intact.
The LED in the display
is broken
Change the LED
The max value is not
accordant (refer to
§3.1)
Adjust potentiometer Imin on the
power board.
5
The max and min value displayed doesn’t
accord with the set value.
The min value is not
accordant (refer to
§3.1)
Adjust potentiometer Imaxin the
current meter.
6
No no-load voltage output (MMA)
The machine is
damaged
Check the main circuit and the Pr4.
The welding cable is
not connected with the
two output of the
welder.
Connect the welding cable to the
welder’s output.
The welding cable
damaged.
Repair or change it.
The earth cable
connected unstably.
Check the earth cable.
The welding cable is
too long.
Use an appropriate welding cable.
There is oil or dust on
the workpiece.
Check and remove it.
There is spark on the HF
igniting board.
The distance between
tungsten electrode
and workpiece is too
long.
Reduce the distance (about 3mm).
The HF igniting board
does not work.
Repair or change Pr8
The distance between
the discharger is too
short.
Adjust this distance (about 0.7mm).
7
Arc can
not be
ignited
(TIG)
There is not spark on the HF
igniting board.
The malfunction of the
welding gun switch.
Check the welding gun switch,
control cable and aero socket.