Unitor UWI-230TP, Руководство по сборке и подготовке

Страница: 3 / 15

PROBLEM CASE SOLUTION
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.
There is voltage after the
disconnecting switch but the
machine does not go on. The
LED L1 is 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 (Picture 3).
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 (Picture 3) 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)
You have to check if the LED on rear panel is
on. (Picture 4).You have to check the value
of the main power supply.
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 board 0074;
- check the PFC Module and Inverter
(Picture 2,6)
if they are damaged, replace the power board
0070;
Input bridge rectifier (Picture 5);
if it is damaged, verify also inverter and PFC
module.
If they are working then replace only the Input
rectifier, otherwise both.
CAUTION!
Before carrying out any work on the machine
make sure it is off and the plug has been
disconnected.
!