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CONTENTS
OPERATION AND WIRING DIAGRAMS................ 2
REPAIR GUIDE.......................................................10
SPARE PARTS LIST...............................................17
REPAIR SHEET...................................................... 19
" r e p a r a t i o n
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
AND REPAIR MANUAL
AND REPAIR MANUAL
AND REPAIR MANUAL
AND REPAIR MANUAL
PAGE
2
3
5
6
10
11
11
14
16
n o
inver ter
p r o b l e m ! "
cod. 988567
20/09/04
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Summary of Contents for Telwin TECNICAPLASMA18-31
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Page 1: Table Of Contents
cod. 988567 inver ter TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING AND REPAIR MANUAL AND REPAIR MANUAL AND REPAIR MANUAL AND REPAIR MANUAL CONTENTS PAGE OPERATION AND WIRING DIAGRAMS....2 Block diagram Analysis of the block diagram Illustrations Wiring diagrams REPAIR GUIDE............10 Equipment required General repair instructions Troubleshooting and remedies Testing the machine... -
Page 2: Operation And Wiring Diagrams
TECNICA PLASMA 18 - 31 OPERATION AND WIRING DIAGRAMS OPERATION AND WIRING DIAGRAMS OPERATION AND WIRING DIAGRAMS OPERATION AND WIRING DIAGRAMS BLOCK DIAGRAM - 2 -... -
Page 3: Analysis Of The Block Diagram
TECNICA PLASMA 18 - 31 ANALYSIS OF THE BLOCK DIAGRAM Block 9 Inductance NOTE: Unless indicated otherwise, it should be assumed that Consisting of: L2. the components are assembled on the primary board. Levels the secondary board diodes’ output current making it practically continuous. - Page 4 TECNICA PLASMA 18 - 31 Block 18 Block 27 Current potentiometer Consisting of: R42. Consisting of:V1. This is used to set the reference voltage needed to adjust the Powered directly by block 11 (flyback transformer) and cools output current: when the potentiometer knob is turned the the power components.
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Page 5: Illustrations
TECNICA PLASMA 18 - 31 ILLUSTRATIONS Power board (11) RECTIFIER FLY-BACK BRIDGE POWER SUPPLY (31) (32) PRIMARY AIR SOLENOID POWER RELAY FILTRE VALVE PRE-CHARGE TRANSFORMER PLASMA CONTROL BOARD (18) CURRENT POTENTIOMETER (26) POWER SUPPLY LED (30) TORCH POWERED LED (17) ALARM FILTER (12) -
Page 6: Wiring Diagrams
TECNICA PLASMA 18 - 31 WIRING DIAGRAMS TECNICA PLASMA 18 - 31 General wiring diagram - 6 -... - Page 7 TECNICA PLASMA 18 - 31 TECNICA PLASMA 18 Wiring diagram for power – power supply/control board Wiring diagram for power board – power /driver - 7 -...
- Page 8 TECNICA PLASMA 18 - 31 TECNICA PLASMA 31 Wiring diagram for power board – power supply/control Wiring diagram for power board – power /driver - 8 -...
- Page 9 TECNICA PLASMA 18 - 31 TECNICA PLASMA 18 - 31 Wiring diagram for control board - 9 -...
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Page 10: Repair Guide
3 Variac 0 - 300v 1500 VA cod. 802402 (*) 4 Digital multimeter USEFUL INSTRUMENTS 5 Unsoldering station 6 Miscellaneous tools (*)The instruments with codes can be supplied by Telwin. The sale price is available on request. - 10 -... -
Page 11: General Repair Instructions
N.B. If the relay contacts never be modified without prior authorisation from Telwin. are stuck together or dirty, do not attempt to separate them I) For further information on machine specifications and and clean them, just replace the relay. -
Page 12: Power Transformer
TECNICA PLASMA 18 - 31 IGBT's Q1, Q2 fig. 4 ohm ( fig. 2B Probable cause: thermostat continuity test on the power transformer: clean discontinuation in snubber network, the resin from the bump contacts of ST2 and measure the fault in driver circuit resistance between the two bump contacts, it should be poorly functioning thermal contact between IGBT and approx. - Page 13 The board is identified by a 6-digit code (printed in white on the component side after the initials TW). This is the reference FIGURE B SETTINGS code for requesting a replacement: Telwin may supply boards · PROBE CH1 x100; that are compatible but with different codes. · 100 V/Div;...
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Page 14: Testing The Machine
TECNICA PLASMA 18 - 31 A) Please read the procedure for replacing the IGBT's on the dissipator so as to lock the component); carefully (fig. 4) place the dissipator with the new components in the PCB bump contacts and fasten them down with the screws The 2 IGBT's are attached to 2 different dissipators and whenever a replacement is required, both IGBT's should be (torque wrench setting for screws 1 Nm ±20%);... - Page 15 TECNICA PLASMA 18 - 31 D) Running time check and closing the machine FIGURE D Switch number With the load status as in fig. E and the cutting current Position of switch adjustment potentiometer (R42) on maximum, switch on the B) Rated load test: power source and leave it in operation until the thermostatic set up the static load generator with the switch settings as...
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Page 16: Illustrations
TECNICA PLASMA 18 - 31 ILLUSTRATIONS FIG. 1 CURRENT REGULATION POTENTIOMETER POWER SUPPLY LED SCREWS TOP COVER TORCH POWERD LED ALARM PLASMA TORCH WORK CABLE FIG. 2A FIG. 2B RHEOFORES BUMP BUMP BOARD BOARD RHEOFORES CONTACTS CONTACTS SCREWS POWER SUPPLY POWER POWER SCREWS... -
Page 17: Spare Parts List
TECNICA PLASMA 18 - 31 ELENCO PEZZI DI RICAMBIO - LISTE PIECES DETACHEES SPARE PARTS LIST - ERSATZTEILLISTE - PIEZAS DE REPUESTO Esploso macchina, Dessin appareil, Machine drawing, Explosions Zeichnung des Geräts, Diseño seccionado maquina. 15 29 10 Per richiedere i pezzi di ricambio senza codice precisare: codice del modello; il numero di matricola; numero di riferimento del particolare sull'elenco ricambi. Pour avoir les pieces detachees, dont manque la reference, il faudra preciser: modele, logo et tension de I'appareil;... - Page 18 In order to improve the service, each servicing centre is requested to fill in the technical card on the following page at the end of every repair job. Please fill in this sheet as accurately as possible and send it to Telwin. Thank you in advance for your co-operation!
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Page 19: Repair Sheet
TECNICA PLASMA 18 - 31 Official servicing centers Repairing sheet Date: Inverter model Serial number: Company: Technician: In which place has the inverter been used? Building yard Workshop Others: Supply: Power supply From mains without extension From mains with extension m Mechanichal stresses the machine has undergone to cription: Dirty grade... - Page 20 TELWIN S.p.A. - Via della Tecnica, 3 36030 VILLAVERLA (Vicenza) Italy Tel. +39 - 0445 - 858811 Fax +39 - 0445 - 858 / 858 E-mail: telwin@telwin.com http://www.telwin.com...
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