CEBORA S.p.A.
2
CONTENTS
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 TIG 250 AC/DC power source. ............................................................................................ 4
3
- MAINTENANCE............................................................................................................................................ 7
3.1
- Periodic inspection, cleaning. ....................................................................................................................... 7
3.2
- Operating sequences. .................................................................................................................................... 7
3.2.1
- Control panel commands and signals......................................................................................................... 7
3.2.2
- Power Source TIG operation. .................................................................................................................... 8
3.3
- Troubleshooting.......................................................................................................................................... 10
3.3.1
- The power source does not start, control panel off. ................................................................................. 10
3.3.2
- Power source powered, control panel on, fan (45) stopped. .................................................................... 12
3.3.3
- System powered, display and signals do not show the correct values. .................................................... 13
3.3.4
- The start button produces no effect.......................................................................................................... 15
3.3.5
- In TIG mode, no gas flows from the torch............................................................................................... 16
3.3.6
- In TIG mode, gas flows from the torch, the arc does not strike (no high frequency). ............................. 17
3.3.7
- In open circuit operation, the output voltage is not regular. .................................................................... 19
3.3.8
- In resistive load operation, the output voltage is not regular. .................................................................. 22
3.3.9
- AC operation, arc unstable, welding irregular. ........................................................................................ 24
3.4
- Alarm signals.............................................................................................................................................. 25
3.4.1
- Led (Y) off. Power source output voltage greater than 48 Vac. .............................................................. 25
3.4.2
- Led (F) on. Temperature of the transformer (46) or inductor (50) too high, or low pressure of the coolant
fluid. ........................................................................................................................................................ 25
4
- COMPONENTS LIST................................................................................................................................... 26
4.1
- Power source art. 236.76 : see file ESP236.76.pdf enclosed at the end of the manual............................... 26
4.2
- Components table : see file ESP236.76.pdf enclosed at the end of the manual.......................................... 26
4.3
- Spare parts list. ........................................................................................................................................... 26
5
- ELECTRICAL DIAGRAMS ........................................................................................................................ 27
5.1
- Power source art. 236.76 : see file SCHE236.76.pdf enclosed at the end of the manual............................ 27
5.2
- Waveforms. ................................................................................................................................................ 27
5.2.1
- Output voltage with open-circuit power source (par. 3.3.7). ................................................................... 27
5.2.2
- Firing pulses for SCR1 with open-circuit power source (par. 3.3.7). ...................................................... 27
5.2.3
- Firing pulses for SCR2 with open-circuit power source (par. 3.3.7). ...................................................... 27
5.2.4
- Output current with power source loaded in table conditions (par. 3.3.8). .............................................. 28
5.2.5
- Output voltage with power source loaded in table conditions (par. 3.3.8)............................................... 28
5.2.6
- Firing pulses for SCR3 with power source loaded in table conditions (par. 3.3.8).................................. 28
5.3
- Mains filter board (51) code 5.600.993/A. ................................................................................................. 29
5.4
- Fuse board (4) code 5.602.288.................................................................................................................... 29
5.5
- Control board (40) code 5.602.293/A. ........................................................................................................ 30
5.6
- Shut-off board (48) code 5.602.289............................................................................................................ 31
5.7
- Snubber board (6) code 5.602.294.............................................................................................................. 32
5.8
- HF board (42) code 5.602.290. ................................................................................................................... 32
5.9
- HF-filter board (41) code 5.602.291. .......................................................................................................... 33
5.10
- Connector board (49) code 5.602.292. ....................................................................................................... 33
5.11
- Diode group (19) code 3.200.090/A. .......................................................................................................... 34
3.302.221
15/01/07
Summary of Contents for TIG 250 AC-DC
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