Troubleshooting; The Power Source Does Not Start, Operator Panels On Power Source And Gas Console Off - Cebora PLASMA PROF 164 HQC Service Manual

CEBORA S.p.A.

3.3 - Troubleshooting.

ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED
THE SWITCH (A) IS A FUNCTION SWITCH, NOT A MAIN POWER SWITCH.
THIS IS WHY THERE IS HAZARDOUS VOLTAGE PRESENT INSIDE THE POWER
SOURCE 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 the operator must determine (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 panels on Power Source and Gas
Console off.
MAINS SUITABILITY TEST.
No voltage for mains protection tripped.
♦ Correctly position the voltage changes.
♦ Remove any short-circuits on the transformer connections (27).
♦ Make sure that the bridge (23) is not short-circuited.
♦ Check the wiring between J5 pre-charge board (45) and mains input terminal
board (55) and between J7 of pre-charge board (45) and the terminals of the
contactor (44).
♦ Make sure that the terminals J5 and J7 on the pre-charge board (45) are not short-
circuited. Replace pre-charge board (45) if necessary.
♦ Make sure that the contact (44) does not have its contacts stuck, or that it is not
ordered to close before the DC-capacitors have been pre-charged on the pilot arc
board (58), and the transformer (27) pre-magnetized. If necessary, perform the
checks listed in case of failure of the CAPACITOR PRE-CHARGE AND
TRANSFORMER (27) PRE-MAGNETIZATION TEST in par. 3.3.2.
♦ Mains not suitable to power the Power Source (ex.: insufficient installed power).
MAINS CONNECTION TEST.
Mains input terminal board (55), terminals U1, V1, W1 = 3 x 230/400/440 Vac according to
the mains voltage conditions.
3.302.218
WARNING
PERSONNEL.
NOTE
Correct?
NO
Correct?
YES
YES
NO
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9/8/2006