281 T / 281 W
Ultima modifica/Last Update: 18/03/2008 Rev0 pagina 11 di
17
PROBLEM
CASE
SOLUTION
The machine does not
switch on.
Electrical power does not reach the ma-
chine.
Voltage reaches the machine switch but
there is no voltage after the contacts.
There is voltage after the disconnecting
switch but the machine does not go on.
!
Make sure the line switches are closed, the
protection devices (fuses) have not been
enabled and that the power supply cable is
intact.
!
Switch the machine off and disconnect the
plug. Make sure that when the switch is
closed, there is continuity between the
contact input and output and the varistors
are not broken. (picture 5). If they are dam-
aged the line filter board 0068 must be re-
place (picture 5). Otherwise check the
power board.
!
Switch the machine off and disconnect the
plug, check that the Power Transformer
cable is connected to the Power Board
(picture 6).
The protection devices
of the line set off when
the switch is activated
and the machine does
not go on.
Damaged power supply cable with short-
circuited wires.
Inverter is damaged.
!
Switch off the machine and disconnect the
plug. Make sure that there are no short cir-
cuits between the poles of the plug caused
by a damaged power supply cable.
!
Switch off the machine, disconnect the
plug and check:
- varistors (picture 5);
- inverter (picture 4);
Input bridge rectifier (picture 3);
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