Lincoln Electric SVM155-A service manual

Contents

Main SERVICE MANUAL SVM155-A MUL TI-SOURCE Safety Depends on You i i FOR ENGINE powered equipment. WARNING ELECTRIC AND MAGNETIC FIELDS may be dangerous ii ii ARC RAYS can burn. ELECTRIC SHOCK can kill. FUMES AND GASES can be dangerous. iii iii FOR ELECTRICALLY powered equipment. CYLINDER may explode if damaged. WELDING SPARKS can cause fire or explosion. iv iv PRCAUTIONS DE SRET Mar. 93 PRCAUTIONS DE SRET POUR LES MACHINES SOUDER TRANSFORMATEUR ET REDRESSEUR MASTER TABLE OF CONTENTS FOR ALL SECTIONS - INSTALLATION SECTION - TECHNICAL SPECIFICATIONS - Multi-Source K1752-1 PHYSICAL DIMENSIONS TEMPERATURE RANGES INPUT - THREE PHASE ONLY CURRENT RANGE OCV RECOMMENDED INPUT WIRE AND FUSE SIZES RATED OUTPUT Rear Panel STACKING W V U FUSE AND WIRE SIZES INPUT AND GROUNDING CONNECTIONS WARNING RECONNECT PROCEDURE ----------------------------------------------------------- OUTPUT CONNECTIONS PARALLELING MULTI-SOURCE OUTPUT LIMITATIONS DISTRIBUTION BOX PIG TAIL LEADS AND CONNEC- TIONS Page Page SAFETY INSTRUCTIONS GENERAL DESCRIPTION RECOMMENDED EQUIPMENT/PROCESSES DESIGN FEATURES AND ADVAN- TAGES RECOMMENDED EQUIPMENT/CONNECTIONS CONTROLS AND SETTINGS Page ACCESSORIES Page MAINTENANCE SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. ROUTINE AND PERIODIC MAINTE- NANCE Perform the following daily: Page Page Section E-1 Section E-1 -THEORY OF OPERATION- FIGURE E.1 MULTI-SOURCE BLOCK LOGIC DIAGRAM FIRING BOARD THEORY OF OPERATION GENERAL DESCRIPTION INPUT VOLTAGE, FILTER, CONTAC- TOR AND CONTROL TRANS- FORMER MAIN TRANSFORMER, CONTROL BOARD, COOLING FAN MOTOR, DIGITAL METER AND INDICATOR LIGHTS (LEDs) SCR BRIDGE, RESISTOR BANK, FIRING BOARD, AND OUTPUT CAPACITOR/RESISTOR PROTECTION DEVICES AND CIR- CUITS SCR OPERATION -TROUBLESHOOTING & REPAIR SECTION- HOW TO USE TROUBLESHOOTING GUIDE PC BOARD TROUBLESHOOTING PROCEDURES AND REPLACEMENT Page Page Page Page Page CONTROL TRANSFORMER (T2) VOLTAGE TEST TEST PROCEDURE CONTROL TRANSFORMER (T2) VOLTAGE TEST Page Page INPUT CONTACTOR TEST INPUT CONTACTOR TEST (Continued) CONTACTOR COIL T3 T2 T1 U V W TEST FOR CONTACT CONTINUITY INPUT CONTACTOR TEST (Continued) Page MAIN TRANSFORMER (T1) VOLTAGE TEST MAIN TRANSFORMER (T1) VOLTAGE TEST (continued) INPUT CONTACTOR Reconnect Panel Assembly Input Contactor TEST PROCEDURE Page Page STATIC SCR TEST Page Leads Remove Red Paint Anode Cathode ACTIVE SCR TEST Page Leads Remove Red Paint Anode Cathode Page Page CONTROL BOARD TEST CONTROL BOARD TEST (Continued) Firing Board Control Board #201 CONTROL BOARD #274 #273 #222D Page FIRING BOARD TEST Firing Board Control Board TEST PROCEDURE FOR NORMAL FIRING BOARD OPERATION TABLE F.2. - LED 7, 8 and 9 Check List IF THEN Page MULTI-SOURCE METER ACCURACYCHECK MULTI-SOURCE METER ACCURACYCHECK (Continued) METER ACCURACY CHECK J1 PROCEDURE TO RECALIBRATE IF METER IS OUT OF RANGE J2 Control Board R49 NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM - NO LOAD 0 volts 2 ms 50 volts ABNORMAL OPEN CIRCUIT VOLTAGE WAVEFORM ONE OUTPUT SCR NOT FUNCTIONING - NO LOAD 0 volts 2 ms 50 volts TYPICAL SCR GATE VOLTAGE WAVEFORM - NO LOAD 0 volts 2 ms 1 volt Page INPUT CONTACTOR CLEANING AND/OR REPLACEMENT INPUT CONTACTOR CLEANING AND/OR REPLACEMENT (Continued) Page Page CONTROL BOARD REPLACEMENT PROCEDURE CONTROL BOARD REPLACEMENT PROCEDURE (Continued) Firing Board Control Board Control Board MOUNTING SCREWS FIRING BOARD REPLACEMENT PROCEDURE FIRING BOARD REPLACEMENT PROCEDURE (Procedure) Firing Board Control Board Firing Board MOUNTING SCREWS Page 9/16" Bolts #264 #301 Bridge Assembly Mount 1/2" Bolts Copper Leads #251 Positive Output Leads Firing Board Control Board --------------------------------------------------- Mounting Bolt Page INSTALLATION OF SCR OUTPUT BRIDGE MAXIMUM OPEN CIRCUIT VOLTAGE PERFORM METER ACCURACY TEST RETEST AFTER REPAIR NO LOAD READINGS (FAN OFF) Page ELECTRICAL DIAGRAMS ELECTRICAL DIAGRAMS WIRING DIAGRAM - J6 ELECTRODE MULTI-SOURCE WIRING DIAGRAM 10-13-2000 L11414 + + J7 WORK Page ELECTRICAL DIAGRAMS PC BOARD ASSEMBLY-CONTROL PART NO. DESCRIPTION J1 J2 J3 Page ELECTRICAL DIAGRAMS PC BOARD ASSEMBLY-FIRING G3742-1 LED8 LED7 M14312-1 OUTPUT SNUBBER PC BOARD ASSEMBLY- SNUBBER NEG GND SVM ERROR REPORTING FORM