221 AC/DC
Ultima modifica/Last Update/Letzte Veraenderung: 23/04/2014 Rev1
pagina 13 di 35
CAUTION!
Before carrying out any work on the machine
make sure it is off and the plug has been dis-
connected.
!
The machine does not
switch on.
Lack of power supply
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 switch is closed, the
protection devices (fuses) are not enabled
and that the power supply cable is in good
condition.
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 varistor is
not broken. If broken, replace board 0074.
(Picture 1).
Switch the machine off and disconnect the
plug. Check the PFC Module on the power
board, if it is damaged, replace the power
board (Picture 2)
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
circuits between the poles of the plug
caused by a damaged power supply cable.
Switch off the machine and disconnect the
plug, then check :
- varistor (Picture 1);
if it is damaged, replace the power board
0074;
Inverter (Picture 4) or
PFC Module (Picture 2),
if they are damaged, replace the power
board 0070;
Input bridge rectifier (Picture 3);
if it is damaged, verify also inverter and
PFC module.
If they are working then replace only the
Input rectifier, otherwise both.
The front panel does
not switch on.
The fan works but the front panel does
not go on.
Switch off the machine and disconnect the
plug. Make sure the flat cable that con-
nects the front panel to the power board is
inserted correctly. If correctly inserted, re-
place the front panel, 050.0001.0015.
If the front panel does not go on, check
PFC Module. If it is damaged, replace the
power board (Picture 1)
