150 TURBO / 150
Ultima modifica/ Last Update: 18/03/2008 Rev0 pagina 10 di 15
PROBLEM
CASE
SOLUTION
The MMA/TIG output
voltage is about 10V
and the machine does
not weld.
The output voltage cable that goes to the
Power Board is interrupted.
The primary current alarm on the power
board is activated.
!
Switch off the machine and disconnect the
plug:
Make sure that the wiring contact is cor-
rectly inserted in the connector (picture
1).
Check for continuity between the +/- out-
put outlets and that the 6-path connector
is connected to the power board;
!
The power board must be replaced.
The output voltage in
each procedure is about
14V and enabling of the
thermal protection de-
vice.
Wait a few minutes keeping the machine on
to favour cooling of the inverter. If the ma-
chine continues running with the protection
devices on, switch the machine off and dis-
connect the plug. Remove the hood and
make sure:
the temperature of the heat sink tool is
less than 40°C;
If it is less than 40°C, check whether the
thermal protective device contacts are
normally closed.
- If one of the protection devices is always
opened it is defective, it must be
accordingly replaced.
- If it is closed, make sure the two terminals
are well inserted in the connector(picture 1).
- Power board feed problems, it must be
accordingly replaced.
The output voltage in
MMA is zero.
Switch the machine off and disconnect the
plug. Check for a short circuit at the DINSE
plug with a diode tester. A short circuit may
be caused by :
damaged diodes;
Damaged voltage doubler;
Damaged inverter;
The inductive value of the Power Trans-
former is null.
Switch off the machine and disconnect the
plug. Remove the snubber board (above the
Power Transformer):
!
check with a diode tester the status of the
diodes. If they are damaged, they must be
replaced;
!
Check with a diode tester the status of the
voltage doubler , if it’s damaged it must be
replaced;
!
Check the status of the Power Board
(picture 3);
!
The Power Transformer must be replaced.
The output voltage in
MMA is not 90 V.
The voltage doubler is damaged.
The Power board 0001 is damaged.
The Front Panel is damaged.
The shunt wires are damaged or not cor-
rectly inserted in the 6-pin connector.
!
Replace the damaged components or the
damaged boards.
!
Connect the cables or if damaged replace
them.
