Table Of Contents - Cebora PLASMA PROF 80 Service Manual

CEBORA S.p.A.
1 - GENERAL INFORMATION...........................................................................................................3
1.1 - Introduction. ...................................................................................................................................3
1.2 - General service policy....................................................................................................................3
1.3 - Safety information..........................................................................................................................3
1.4 - Electromagnetic compatibility. ......................................................................................................3
2 - SYSTEM DESCRIPTION................................................................................................................4
2.1 - Introduction. ...................................................................................................................................4
2.2 - Technical specifications. ................................................................................................................4
2.3 - Description of power source art. 947. ............................................................................................4
3 - MAINTENANCE .............................................................................................................................6
3.1 - Periodic inspection, cleaning. ........................................................................................................6
3.2 - Operating sequence. .......................................................................................................................6
3.2.1 - Power source commands and signals. .........................................................................................6
3.2.2 - Power source operation. ..............................................................................................................7
3.3 - Troubleshooting. ............................................................................................................................8
3.3.1 - The power source does not start, led (V) off. ..............................................................................8
3.3.2 - Power source powered, led (V) lit, fan (45) stopped. ................................................................10
3.3.3 - The start button produces no effect. ..........................................................................................10
3.3.4 - No gas flows from the torch. .....................................................................................................11
3.3.5 - Gas flows from the torch, the pilot arc does not light (high frequency missing). .....................11
3.3.6 - Gas flows from the torch, the pilot arc does not light (nozzle voltage missing). ......................13
3.3.7 - In open circuit operation, the output voltage is not regular. ......................................................15
3.3.8 - Irregular pilot arc starts, unstable pilot arc. ...............................................................................17
3.3.9 - Transfer arc does not take place or is too weak for cutting. ......................................................18
3.4 - Alarm signals. ..............................................................................................................................20
3.4.1 - Led (G) lit = transformer (50) temperature outside limits. ........................................................20
3.4.2 - Led (L) steadily lit = low gas pressure. .....................................................................................20
3.4.3 - Led (L) flashing = start button pressed during the power source start-up. ................................21
3.4.4 - Led (S) lit = protection (R) of the central adapter not activated................................................21
3.4.5 - Led (S) flashing = reed contact (26) closed upon power source start-up. .................................21
4 - COMPONENTS LIST....................................................................................................................22
4.1 - Power source art. 947 : see file ESP947.pdf enclosed at the end of the manual. .........................22
4.2 - Components table: see file ESP947.pdf enclosed at the end of the manual.................................22
4.3 - List of spare parts. ........................................................................................................................22
5 - ELECTRICAL DIAGRAMS..........................................................................................................23
5.1 - Power source art. 947 : see file SCHE947.pdf enclosed at the end of the manual.......................23
5.2 - Waveforms. ..................................................................................................................................23
5.2.1 - HF command pulse (par. 3.3.5). ................................................................................................23
5.2.2 - Open-circuit output voltage for the duration of approximately two seconds (maximum pilot arc
time) (par. 3.3.6, 3.3.7)..............................................................................................................23
5.2.3 - Pilot arc current signal (par. 3.3.6, 3.3.8). .................................................................................23
5.3 - Fuse board (18) code 5.602.148. ..................................................................................................24
5.4 - Relay board (27) code 5.602.161. ................................................................................................24
5.5 - Power board (20) code 5.602.156. ...............................................................................................25
5.6 - Setting board (19) code 5.602.159/C. ..........................................................................................26
5.7 - Control board (9) code 5.602.160. ...............................................................................................27
5.8 - HF board (25) code 5.602.155. ....................................................................................................28
5.9 - HF-filter board (22) code 5.602.165/D. .......................................................................................28
3.302.167
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25/06/04