Snap-On TIG 250 AC-DC, Руководство по обслуживанию

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CEBORA S.p.A.
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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