Page 2 - SAFETY; WARNING; CALIFORNIA PROPOSITION 65 WARNINGS; The Above For Diesel Engines
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FOR ENGINEpowered equipment. 1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. Opera...
Page 3 - ii
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ii SAFETY ii ARC RAYS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks andthe rays of the arc when welding or observingopen arc welding. Headshield and filter lenss...
Page 4 - iii
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FOR ELECTRICALLYpowered equipment. 8.a. Turn off input power using the disconnect switch at the fuse box before working onthe equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, al...
Page 5 - iv; PRÉCAUTIONS DE SÛRETÉ
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC iv SAFETY iv PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instruc- tions et les précautions de sûreté specifiques qui parraissent d a n s c e m a n u e l a u s s i b i e n q u e l e ...
Page 6 - vi; MASTER TABLE OF CONTENTS FOR ALL SECTIONS; PAGE; RETURN TO MAIN INDEX
INVERTEC V250-S vi MASTER TABLE OF CONTENTS FOR ALL SECTIONS PAGE INSTALLATION .......................................................................................................................SECTION A TECHNICAL SPECIFICATIONS ......................................................................
Page 7 - INSTALLATION; TABLE OF CONTENTS
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SECTION-A-1 INSTALLATION INVERTEC V250-S SECTION-A-1 TABLE OF CONTENTS -INSTALLATION SECTION- TECHNICAL SPECIFICATIONS ....................................................................................................
Page 8 - PHYSICAL DIMENSIONS; Hz; INPUT; Technical Specifications - Invertec V250-S
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC A-2 INSTALLATION INVERTEC V250-S A-2 Height Width Depth Weight 15.0 in. 9.1 in. 19.7 in. 36 lbs. 381 mm 231 mm 500 mm 17 Kg PHYS...
Page 9 - SAFETY PRECAUTIONS; • Have an electrician install and ser-; SELECT SUITABLE LOCATION; • The machine must be located where there is free cir-; INPUT CONNECTIONS; Supply line entry provision is in the case rear panel.
A-3 INSTALLATION INVERTEC V250-S A-3 Read this entire installation section before youstart installation. SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Have an electrician install and ser- vice this equipment. • Turn the input power off at the fuse box before working on equipment. • Do not touch elec...
Page 10 - INPUT FUSE AND SUPPLY WIRE; Technical Specifications page at the; Return to Section TOC; RECONNECT PROCEDURE; CAUTION; Figure A.1 Input Voltage Reconnect Instructions
A-4 INSTALLATION INVERTEC V250-S A-4 P O W E R I N P U T C O N N E C T I O N F O R 5 0 / 6 0 H ZMACHINES 1. Connect terminal marked to earth ground per National Electric Code. 2. Connect the supply lines to the line switch. Torque to 3.0 Nm. 3. Install in accordance with all local and national elect...
Page 11 - OUTPUT CONNECTIONS; FIGURE A.2 OUTPUT CONNECTIONS; REMOTE CONTROL RECEPTACLE; Cable Sizes for Combined Length of Electrode and; QUICK DISCONNECT PLUGS
A-5 INSTALLATION INVERTEC V250-S A-5 OUTPUT CONNECTIONS Refer to figure A.2 for the location of the 6 Pin RemoteReceptacle and the Output Terminals. FIGURE A.2 OUTPUT CONNECTIONS REMOTE CONTROL RECEPTACLE Remote control (K857), Arc start switch (K814), Handamptrol (K963) and Foot amptrol (K870) conn...
Page 12 - NOTES
A-6 NOTES INVERTEC V250-S A-6 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
Page 13 - OPERATION
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC OPERATION INVERTEC V250-S SECTION-B-1 SECTION-B-1 TABLE OF CONTENTS -OPERATION SECTION- SAFETY INSTRUCTIONS ...........................................................................................................B...
Page 14 - GENERAL DESCRIPTION; OPERATIONAL FEATURES; SAFETY INSTRUCTIONS; ELECTRIC SHOCK can kill.
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC B-2 OPERATION B-2 GENERAL DESCRIPTION The Invertec V250-S is a 250 amp arc welding powersource that utilizes single or three pha...
Page 15 - Power Switch - Place the lever in the “ON” position; CC Crisp; Hot Start - Controls the amount of starting energy; CONTROLS AND SETTINGS
B-3 OPERATION B-3 1. Power Switch - Place the lever in the “ON” position to energize the machine. When the power is on, thefan will operate and the output will be energized inSMAW modes. GTAW mode requires remote trig-ger to energize the output. 2. Output Control - This controls the output current. ...
Page 16 - CONSTANT CURRENT PROCESSES; AIR CARBON ARC CUTTING
B-4 OPERATION B-4 6. Arc Force - This control functions in SMAW modes to adjust the Arc Force. The arc is soft at the mini-mum settings and more forceful or driving at themaximum settings. Higher spatter levels may bepresent at the maximum settings. 7. Output Terminals - These quick disconnect termi...
Page 17 - PARALLEL OPERATION
B-5 OPERATION B-5 PARALLEL OPERATION T h e I n v e r t e c ’ s a r e o p e r a b l e i n p a r a l l e l . F o r b e s tresults, the currents of each machine should be rea-s o n a b l y w e l l s h a r e d . A s a n e x a m p l e , w i t h t w omachines set up in parallel for a 300 amp procedure,eac...
Page 19 - ACCESSORIES
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SECTION C-1 ACCESSORIES SECTION C-1 INVERTEC V250-S TABLE OF CONTENTS -ACCESSORIES SECTION- OPTIONS / ACCESSORIES .........................................................................................................
Page 20 - OPTIONS / ACCESSORIES; CABLE PLUGS; K857 - Remote Output Control for stick welding.; for TIG welding. When the; for TIG welding. When the
C-2 ACCESSORIES C-2 OPTIONS / ACCESSORIES CABLE PLUGS K852-70 - Cable Plug Kit for 1/0-2/0 cable. Attachesto welding cable to provide quick disconnect frommachine. K852-95 - Cable Plug Kit for 2.0-3/0 cable. N O T E : T w o K 8 5 2 - 7 0 p l u g s a r e i n c l u d e d w i t h t h eV250-S. REMOTE CO...
Page 21 - MAINTENANCE
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SECTION D-1 MAINTENANCE SECTION D-1 INVERTEC V250-S TABLE OF CONTENTS -MAINTENANCE SECTION- INPUT FILTER CAPACITOR DISCHARGE PROCEDURE.........................................................D-2ROUTINE MAINTENANCE .....
Page 22 - ELECTRIC SHOCK; FIGURE D.1 — LOCATION OF INPUT FILTER CAPACITOR TERMINALS.
D-2 MAINTENANCE D-2 INPUT FILTER CAPACITORDISCHARGE PROCEDURE 1. Turn off input power or disconnect input power lines. 2. Remove the 5/16" hex head screws from the side and top of the machine and remove wrap-aroundmachine cover. 3. Be careful not to make contact with the capacitor terminals that...
Page 23 - ROUTINE MAINTENANCE
D-3 MAINTENANCE D-3 ROUTINE MAINTENANCE 1. Perform the following preventive maintenanceprocedures at least once every six months. It isgood practice to keep a preventive maintenancerecord; a record tag attached to the machineworks best. 2. Remove the machine wrap-around cover and per-form the input ...
Page 24 - FIGURE D.2 — LOCATION OF MAINTENANCE COMPONENTS.
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC D-4 MAINTENANCE D-4 INVERTEC V250-S FIGURE D.2 — LOCATION OF MAINTENANCE COMPONENTS. POWER PC BOARD CONTROL PC BOARD INPUT RECTI...
Page 25 - THEORY OF OPERATION
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC E-1 THEORY OF OPERATION E-1 INVERTEC V250-S TABLE OF CONTENTS -THEORY OF OPERATION SECTION- GENERAL DESCRIPTION............................................................................................................
Page 26 - INPUT LINE VOLTAGE
E-2 THEORY OF OPERATION E-2 INPUT LINE VOLTAGE The single-phase or three-phase input power of 208,230 or 460 volts AC is connected to the machine,through a line switch located on the front panel. A reconnect panel and switch allows the user to con-figure the machine for either a low or high input vo...
Page 27 - PRECHARGE AND PROTECTION; IGBT Operation Discussion and diagrams in
E-3 THEORY OF OPERATION E-3 PRECHARGE AND PROTECTION The input voltage is rectified and the DC voltage isapplied, through the reconnect switch, to the powerboard. The power board contains precharging circuit-ry for the safe charging of the input filter capacitors.Once the capacitors are precharged a...
Page 28 - MAIN TRANSFORMER; FIGURE E.3 MAIN TRANSFORMER
E-4 THEORY OF OPERATION E-4 MAIN TRANSFORMER Each IGBT pair acts as a switch assembly. Eachassembly feeds a separate, oppositely wound primarywinding of the main transformer. The reverse direc-tions of current flow through the main transformer pri-maries and the offset timing of the IGBT pairs induc...
Page 29 - IGBT Operation Discussion
E-5 THEORY OF OPERATION E-5 OUTPUT RECTIFICATION AND CONTROL The AC output from the main transformer secondaryis rectified to a DC output and applied to the outputterminals. Output voltage and current feedback infor-mation, which is fed to the control board, is sensed atthe output terminals and shun...
Page 30 - PROTECTION CIRCUITS; OVERLOAD PROTECTION; Machine did not have power applied for many; THERMAL PROTECTION
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC E-6 THEORY OF OPERATION E-6 PROTECTION CIRCUITS P r o t e c t i v e c i r c u i t s a r e d e s i g n e d i n t o t h e V 2 5 0 ...
Page 31 - FIGURE E.6 IGBT OPERATION
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC E-7 THEORY OF OPERATION E-7 INSULATED GATE BIPOLAR TRANSISTOR (IGBT) OPERATION An IGBT is a type of transistor. IGBTs are semico...
Page 32 - PULSE WIDTH MODULATION; MINIMUM OUTPUT; conducting for 1 microsecond. The negative; MAXIMUM OUTPUT; FIGURE E.7 TYPICAL IGBT OUTPUTS
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC E-8 THEORY OF OPERATION E-8 PULSE WIDTH MODULATION The term PULSE WIDTH MODULATION is used todescribe how much time is devoted t...
Page 33 - TROUBLESHOOTING & REPAIR; REPAIR AND REPLACEMENT PROCEDURES
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INVERTEC V250-S SECTION F-1 TROUBLESHOOTING & REPAIR SECTION F-1 TABLE OF CONTENTS -TROUBLESHOOTING & REPAIR SECTION- TROUBLESHOOTING AND REPAIR SECTION...........................................................
Page 34 - HOW TO USE TROUBLESHOOTING GUIDE
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INVERTEC V250-S F-2 TROUBLESHOOTING & REPAIR F-2 This Troubleshooting Guide is provided tohelp you locate and repair possibl...
Page 35 - PC BOARD TROUBLESHOOTING PROCEDURES
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INVERTEC V250-S F-3 TROUBLESHOOTING & REPAIR F-3 _______________________________ C A U T I O N : S o m e t i m e s m a c h i...
Page 36 - Observe all Safety Guidelines detailed throughout this manual; OUTPUT PROBLEMS; The input power switch must be; Auxiliary
F-4 TROUBLESHOOTING & REPAIR F-4 INVERTEC V250-S Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln ElectricService Department for technical troubleshooti...
Page 37 - The mode switch must be in one
F-5 TROUBLESHOOTING & REPAIR F-5 INVERTEC V250-S Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln ElectricService Department for technical troubleshooti...
Page 38 - Input
F-6 TROUBLESHOOTING & REPAIR F-6 INVERTEC V250-S Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln ElectricService Department for technical troubleshooti...
Page 40 - Check the input voltage and input; Input Voltage Reconnect; Check for loose or faulty welding
F-8 TROUBLESHOOTING & REPAIR F-8 INVERTEC V250-S Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln ElectricService Department for technical troubleshooti...
Page 41 - WELDING PROBLEMS; Installation
F-9 TROUBLESHOOTING & REPAIR F-9 INVERTEC V250-S Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln ElectricService Department for technical troubleshooti...
Page 43 - TEST DESCRIPTION
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INVERTEC V250-S F-11 TROUBLESHOOTING & REPAIR F-11 TEST DESCRIPTION This test will determine if the auxiliary transformer is...
Page 44 - TEST PROCEDURE; AUXILIARY TRANSFOMER; Figure F.1 Auxiliary Transformer and Plug J7.
F-12 TROUBLESHOOTING & REPAIR F-12 TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection 3. Locate the Auxiliary Transformer just behind the input line switch on thelower right side of the machin...
Page 45 - TABLE F.1 Auxiliary Transformer Test Points
F-13 TROUBLESHOOTING & REPAIR F-13 7. If the correct test voltages are pre- sent the auxiliary transformer is good. 8. If any of the voltages are missing or very low, with the proper primaryvoltage applied, the auxiliary trans-former may be faulty. Replace. 9. If the auxiliary transformer tests ...
Page 48 - R e m o v e m a i n i n p u t p o w e r t o t h e; Filter Capacitor Discharge; With the Phillips head screwdriver
F-16 TROUBLESHOOTING & REPAIR F-16 TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. Locate Input Rectifier (D9) and lead locations. 4. With the Phillips head screwdriver remove leads #20...
Page 49 - If the Input Rectifier does not meet; TABLE F.2 Input Rectifier Test Points
F-17 TROUBLESHOOTING & REPAIR F-17 6. If the Input Rectifier does not meet the acceptable readings outlined inTable F.2. the component may befaulty. Replace. Note: B e f o r e r e p l a c i n g t h e I n p u t R e c t i f i e r ( D 9 ) c h e c k t h e i n p u tpower switch (S1) and performt h e ...
Page 53 - If the power board does not meet the; P o w e r B o a r d; resistance test proceed to the; Power; TEST POINT TERMINALS; TABLE F.3 Power Board Resistance Test Points.
F-21 TROUBLESHOOTING & REPAIR F-21 6. If the power board does not meet the a c c e p t a b l e r e a d i n g s o u t l i n e d i nTable F.3. the board may be faulty.R e p l a c e . S e e P o w e r B o a r d R e m o v a l a n d R e p l a c e m e n tProcedure. Note: Complete power board and filter...
Page 56 - R e m o v e m a i n i n p u t p o w e r t o t h e
F-24 TROUBLESHOOTING & REPAIR F-24 TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-S. 2. Locate the output terminals on the f r o n t p a n e l o f t h e m a c h i n e . S e eFigure F.4. 3. Remove any output cables and load from the output terminals. 4. Using the analog ...
Page 57 - If more than 200 ohms is measured; Test all output diodes and snubbers
F-25 TROUBLESHOOTING & REPAIR F-25 5. If more than 200 ohms is measured the output diodes are not “shorted”. 6. If less than 200 ohms is measured, one or more output diodes or snub-bers may be shorted or “leaky”. 7. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 8. ...
Page 58 - OUTPUT DIODES; DIODE MODULES
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-26 TROUBLESHOOTING & REPAIR F-26 OUTPUT DIODES TEST (continued) INVERTEC V250-S OUTPUT DIODES SNUBBERS Figure F.6 Output D...
Page 60 - PLUG J6; Figure F.8 Plug J6 on Power Board
F-28 TROUBLESHOOTING & REPAIR F-28 TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. Locate and familiarize yourself with the leads and pin locations in plug J6on the power board. See Fig...
Page 64 - F i l t e r C a p a c i t o r
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-32 TROUBLESHOOTING & REPAIR F-32 INVERTEC V250-S TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-...
Page 68 - Locate and familiarize yourself with; Control Board Plug J2 Test Points; Power Board Plug J6 Test Points
F-36 TROUBLESHOOTING & REPAIR F-36 TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. Locate and familiarize yourself with the leads and pin locations in plug J2on the control board and al...
Page 69 - The following tests will be performed; Capacitor Balance; C h e c k f o r 0 t o 1 V D C a t l e a d s; POWER BOARD
F-37 TROUBLESHOOTING & REPAIR F-37 4. The following tests will be performed with the input power applied to theV250-S. BE CAREFUL. ALWAYSR E M O V E I N P U T P O W E R A N DP E R F O R M F I L T E R C A P A C I T O RD I S C H A R G E P R O C E D U R EB E F O R E T O U C H I N G A N YMACHINE COM...
Page 72 - † Note: This test should only be conducted; Figure F.12 Power Board and Capacitor Test Locations
F-40 TROUBLESHOOTING & REPAIR F-40 TEST PROCEDURE 1. R e m o v e m a i n i n p u t p o w e r t o t h e V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. P u t t h e m o d e s w i t c h S 2 i n t h e SMAW (soft) position and put theL o c a l / R e m o t e ...
Page 73 - maintenance section.; TABLE F.6 Capacitor Voltages; NOTE
F-41 TROUBLESHOOTING & REPAIR F-41 8. Check for the appropriate voltages o u t l i n e d i n T a b l e F . 6 . N o t e :Voltages may vary with the inputline voltage. In the event the capacitor voltage ist o o h i g h o r n o t b a l a n c e d ( w i t h i n20VDC) the protection circuit will pre-v...
Page 75 - MATERIALS NEEDED
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-43 TROUBLESHOOTING & REPAIR F-43 INVERTEC V250-S MATERIALS NEEDED Small needle-nose pliersSmall screwdriver5/16” nut-drive...
Page 76 - PROCEDURE; CONTROL BOARD REMOVAL AND REPLACEMENT (continued); SIX MOUNTING TABS; Control Board Plugs and Mounting Pins
F-44 TROUBLESHOOTING & REPAIR F-44 PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. Locate the control board and the five molex type plugs that are connectedto it. See Figure F.13. 4. Carefully remove the five molex...
Page 78 - Remove plug J6 by depressing the; POWER BOARD REMOVAL AND REPLACEMENT (continued); Power Board Lead Locations
F-46 TROUBLESHOOTING & REPAIR F-46 PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. Locate the power board, the molex t y p e p l u g J 6 , t h e f i v e l e a d s w i t hpush-on connectors and the fourcapacitor lea...
Page 81 - MATCHED PARTS
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-49 TROUBLESHOOTING & REPAIR F-49 INVERTEC V250-S MATERIALS NEEDED 5/16” nut-driverSlot head screwdriver FILTER CAPACITOR R...
Page 82 - P e r f o r m; P o w e r B o a r d R e m o v a l; U s i n g t h e s l o t h e a d s c r e w d r i v e r; FILTER CAPACITOR REMOVAL AND REPLACEMENT (continued)
F-50 TROUBLESHOOTING & REPAIR F-50 PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. P e r f o r m P o w e r B o a r d R e m o v a l Procedure in this section. 4. Using the 5/16’ nut-driver remove the two screws from...
Page 83 - With the bracket assembly out of the
F-51 TROUBLESHOOTING & REPAIR F-51 7. Once the top of the bracket assem- bly is disengaged from the top centerpanel the bracket assembly can beremoved from the bottom of the caseb y s l i d i n g t h e b r a c k e t a s s e m b l ytowards the front of the machine.The locking tab on the bottom of...
Page 86 - L o c a t e t h e i n p u t r e c t i f i e r a n d t h e; INPUT RECTIFIER BRIDGE REMOVAL AND REPLACEMENT (continued); Figure F.16 Input Rectifier Lead Locations
F-54 TROUBLESHOOTING & REPAIR F-54 PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. L o c a t e t h e i n p u t r e c t i f i e r a n d t h e leads connected to it. See FigureF.16. 4. Identify and mark the leads con...
Page 87 - Carefully remove the input rectifier
F-55 TROUBLESHOOTING & REPAIR F-55 7. Carefully remove the input rectifier bridge. 8. When installing a new input rectifier apply a thin coating of Dow Corning340 Heat Sink Compound (LincolnE 1 8 6 8 ) t o t h e m a t i n g s u r f a c e s .T o r q u e t h e m o u n t i n g c a p s c r e w sand ...
Page 90 - Locate output diode assembly and; OUTPUT DIODE ASSEMBLY REMOVAL AND REPLACEMENT; SLEEVED SPLICES; Figure F.17 Output Diode Assembly and Leads
F-58 TROUBLESHOOTING & REPAIR F-58 PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacitor Discharge Procedure detailed in MaintenanceSection. 3. Locate output diode assembly and associated leads. See Figure F.17. 4. Cut the necessary wire ties and slide the sleeving from the ...
Page 91 - F i g u r e; LOCKING TABS; Figure F.18 Heatsink Removal
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-59 TROUBLESHOOTING & REPAIR F-59 INVERTEC V250-S 10. U s i n g t h e s l o t h e a d s c r e w d r i v e r c a r e f u l l...
Page 94 - Figure F.19 Output Diode Assembly and Leads
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-62 TROUBLESHOOTING & REPAIR F-62 INVERTEC V250-S PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacito...
Page 98 - D i s c o n n e c t t r a n s f o r m e r p r i m a r y; MAIN TRANSFORMER REMOVAL AND REPLACEMENT; T3 CURRENT TRANSFORMER; Figure F.20 Main Transformer Right Side
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-66 TROUBLESHOOTING & REPAIR F-66 INVERTEC V250-S PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacito...
Page 99 - D i s c o n n e c t a n d c l e a r t h e s h u n t; Figure F.21 Main Transformer Left Side
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-67 TROUBLESHOOTING & REPAIR F-67 INVERTEC V250-S 6. D i s c o n n e c t a n d c l e a r t h e s h u n t sensing leads from...
Page 100 - Figure F.22 Main Transformer Mountings
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-68 TROUBLESHOOTING & REPAIR F-68 INVERTEC V250-S MAIN TRANSFORMER REMOVAL AND REPLACEMENT (MACHINE CODES BELOW 10150) (con...
Page 101 - Reassemble the shunt assembly to
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-69 TROUBLESHOOTING & REPAIR F-69 22. Reassemble the shunt assembly to the negative output terminal. Takenote of the by-pas...
Page 104 - Figure; Figure F.23 Main Transformer Right Side
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-72 TROUBLESHOOTING & REPAIR F-72 INVERTEC V250-S PROCEDURE 1. Remove input power to the V250-S. 2. Perform Filter Capacito...
Page 105 - D i s c o n n e c t t h e t h e r m o s t a t l e a d s; Figure F.24 Main Transformer Left Side
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-73 TROUBLESHOOTING & REPAIR F-73 INVERTEC V250-S 7. D i s c o n n e c t t h e t h e r m o s t a t l e a d s from the therm...
Page 106 - Figure F.25 Main Transformer Mountings; U s i n g t h e s l o t h e a d s c r e w d r i v e r
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-74 TROUBLESHOOTING & REPAIR F-74 INVERTEC V250-S MAIN TRANSFORMER REMOVAL AND REPLACEMENT (MACHINE CODES ABOVE 10150) (con...
Page 109 - RETEST AFTER REPAIR; INPUT IDLE AMPS AND IDLE WATTS; LESS THAN 2 AMPS
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-77 TROUBLESHOOTING & REPAIR F-77 RETEST AFTER REPAIR INVERTEC V250-S Should a machine under test be rejected for any reaso...
Page 111 - ELECTRICAL DIAGRAMS; Return to Master TOC
G-1 ELECTRICAL DIAGRAMS G-1 INVERTEC V250-S Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Electrical Diagram Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section G Wiring Diagram (Codes 10102, 10103) . . . . . . . . . . . . . . ....
Lincoln Electric 305G
Manual
Lincoln Electric IM646-A
Manual
Lincoln Electric 309
Manual
Lincoln Electric MB232
Manual
Lincoln Electric IM889-A
Manual
Lincoln Electric AC-1200
Manual
Lincoln Electric L12810-6
Manual
Lincoln Electric S350
Manual
Lincoln Electric 248HO
Manual
Lincoln Electric IM794
Manual
Lincoln Electric 350
Manual
Lincoln Electric IM690-A
Manual
Lincoln Electric 300 D
Manual
Lincoln Electric TIG 175 PRO
Manual
Lincoln Electric SVM103-A
Manual
Lincoln Electric IM834-B
Manual
Lincoln Electric LA-17
Manual
Lincoln Electric IM972
Manual
Lincoln Electric 250LX
Manual