Troubleshooting; The Power Source Does Not Start, Operator Panel Off - Cebora PLASMA PROF 123 ACC Service Manual

CEBORA S.p.A.

3.3 - Troubleshooting.

ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED
SWITCH (A) IS A FUNCTION SWITCH NOT A GENERAL SWITCH.
FOR THIS REASON INSIDE THE POWER SOURCE A VOLTAGE IS PRESENT WHICH
IS DANGEROUS EVEN WHEN THE SWITCH IS SET TO "0".
BEFORE REMOVING THE PROTECTIVE GUARDS AND ACCESSING INTERNAL
PARTS, DISCONNECT THE POWER SOURCE FROM THE MAINS AND WAIT FOR THE
INTERNAL CAPACITORS TO DISCHARGE (1 MINUTE).
Items in boldface describe problems that may occur on the machine (symptoms).
Operations preceded by this symbol refer to situations of which the operator must determine
(the causes).
♦ Operations preceded by this symbol refer to actions the operator must perform in order to
solve the problems (solutions).

3.3.1 - The Power Source does not start, operator panel off.

MAINS SUITABILITY TEST.
No power supply for mains protection.
♦ Position the voltage changers correctly.
♦ Eliminate any short circuits on the transformers (37) connections.
♦ Check if the bridge rectifier (34) is short-circuited.
♦ Check the wiring between J5 pre-charge board (3) and the mains input terminal
board (5) and between J7 of pre-charge board (3) and contactor (2) terminals.
♦ Make sure that terminals J5 and J7 on the pre-charge board (3) are not short-
circuited. Replace pre-charge board (3) if necessary.
♦ Make sure that contactor (2) has not stuck contacts or it is not controlled to
closing before the DC-capacitor (20) pre-charge and transformer (37) pre-
magnetization phases completion If required, carry out the DC-CAPACITOR (20)
PRE-CHARGE AND TRANSFORMER (37) PRE-MAGNETIZATION TEST, of
par. 3.3.2.
♦ Mains not suitable to power the Power Source (e.g.: insufficient installed power).
3.302.269
WARNINGS
PERSONNEL.
NOTE
Correct?
NO
YES
10
12/04/2012