Instruction/ maintenance manual of the product SQUARE WAVE SVM118-A Lincoln Electric
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SERVICE MANUAL W orld’ s Leader in W elding and Cutting Pr oducts Premier Manufacturer of Industrial Motors Sales and Service through subsidiaries and Distributors W orldwide 22801 St.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY i i SQUARE W A VE TIG 355 W ARNING PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJUR Y OR DEA TH. KEEP CHILDREN AW A Y . P ACEMAKER WEARERS SHOULD CONSUL T WITH THEIR DOCTOR BEFORE OPERA TING.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY ii ii SQUARE W A VE TIG 355 WELDING SP ARKS can cause fire or explosion. 4.a. Remove fire hazards from the weld- ing area. If this is not possible, cover them to prevent the welding sparks from starting a fir e.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY iii iii SQUARE W A VE TIG 355 FOR ENGINE powered equipment. 7.a. T urn the engine off before tr oubleshooting and maintenance work unless the maintenance work requir es it to be running.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY iv iv SQUARE W A VE TIG 355 PRÉCAUTIONS DE SÛRETÉ Pour votre pr opr e pr otection lir e et observer toutes.
MASTER T ABLE OF CONTENTS FOR ALL SECTIONS v v SQUARE W A VE TIG 355 Page Safety .................................................................................................................................................i-iv Installation .......
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - INST ALLA TION SECTION - Section A-1 Section A-1 SQUARE W A VE TIG 355 Installation T echnical Specifications Square W ave TIG 355 ...............
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 INST ALLA TION A-2 A-2 SQUAR.
Read this entire installation section before you start installation. SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrodes with your skin or wet clothing. • Insulate yourself from the work and ground. • Always wear dry insulating gloves.
3. Be sur e the torch and work cable rubber coverings are fr ee of cuts and cracks that allow high fre- quency leakage. Cables with high natural rubber content, such as Lincoln Stable-Arc ® better r esist high frequency leakage than neopr ene and other synthetic rubber insulated cables.
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 INST ALLA TION A-5 A-5 SQUARE W A VE TIG 355 FIGURE A.2 – INPUT SUPPL Y CONNECTIONS ELECTRIC SHOCK can kill.
The Square W ave TIG 355 should be permanently wired into the power system. Plugs or connectors ar e not recommended. INST ALLA TION A-6 A-6 SQUARE W A VE TIG 355 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 T ABLE A.
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 OUTPUT CONNECTIONS ELECTRIC SHOCK can kill. • Keep the electrode holder , TIG torch and cables insulation in good condition and in place.
DO NOT operate a water -cooled torch unless water is flowing. W ater doesn’t flow until the solenoid is actu- ated. If using a water -cooled torch with a Magnum water cooler , connect the cooler water outlet to the “W ater V alve In” fitting. Connect the TIG torch inlet to the “W ater V alve Out” fitting.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - OPERA TION SECTION - Operation ...................................................................................................................
OPERA TION B-2 B-2 SQUARE W A VE TIG 355 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 OPERA TING INSTRUCTIONS Read and understand this entire section of operating instructions before operating the machine.
GENERAL DESCRIPTION The Square W ave TIG 355 is a constant current, single range square wave AC/DC TIG (GT AW) arc welding power source with built-in high fr equency stabilization.
• 115 V olt receptacle with 15 amp circuit br eaker . • 220 V olt European (Schuko) type receptacle with 2 amp circuit br eaker for water coolers (50/60Hz machines only). • Excellent arc starting and stability up thr ough 400 amps. • High resistance to AC arc r ectification.
CONTROLS AND SETTINGS UPPER CASE FRONT CONTROLS Controls on the upper case fr ont control panel ar e used for manual TIG and stick welding. Their func- tions are described below . Some controls ar e active in both TIG and stick welding, while others are active in TIG only .
UPPER CASE FRONT CONTROL P ANEL The upper case front panel contr ols are used for man- ual TIG and stick welding. 1. CURRENT CONTROL SWITCH A two-position toggle switch: LOCAL (P ANEL): Current is contr olled by the machine settings; remote Amptr ol has no affect on current.
6. PEAK CURRENT CONTROL Presets the maximum welding curr ent the machine will produce, fr om 2 through 400 amps. The preset curr ent is displayed on the digital ammeter when you are not welding. NOTE: The ammeter display is an indicator of the preset curr ent.
At Maximum, the arc will be mor e for ceful and less prone to sticking but will pr oduce more spatter . 12. PREFLOW This control adjusts the amount of time the gas and water valves are open befor e the arc starts. It is adjustable from 0 to 10 seconds.
Example: The Peak Current contr ol is preset at 50 amps and the Amptrol is partially down, giving a peak current of 30 amps. If the Backgr ound Current contr ol is set at 50%, the Background (low pulse) current will be 15 amps. The Amptrol raises and lowers the Peak curr ent.
• ARC EST ABLISHED LED goes on when the arc is fully established and goes out if the arc goes out. • ST ART LED is on from the time the ar c is estab- lished until current begins to go up (soft start) or down (hot start). Note that the Start LED is off during upslope if a soft start is used.
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 OPERA TION B-11 B-11 SQUARE W A VE TIG 355 LOWER CASE FRONT CONTROLS Refer to Figure B.
1. POWER ON/OFF — A momentary start/stop pushbutton, which controls the input contactor . If the input power supply goes off or if the thermo- stat in the welder trips, the start pushbutton must be pressed to r estart the welder . 2. PILOT LIGHT — Indicates when the input contac- tor is ener gized (power is on).
HAND AND FOOT AMPTROL OPERA TION Both the Hand and Foot Amptrol (optional kits K870 or K812) work in a similar manner . They are meant to be used for remote curr ent control when Remote Curr ent control is selected. The TIG 2-Step mode must be selected when using an Amptrol for r emote current control.
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 OPERA TION B-14 B-14 SQUARE W A VE TIG 355 FIGURE B.4 – AMPTROLS USED WITH CURRENT CONTROL IN THE LOCAL POSITION FIGURE B.
WELDING OPERA TION INITIAL ST ART -UP Be sure the Squar e W ave TIG 355 has been installed correctly with r espect to location, high frequency pr o- tection, input power , and output connections. If you are TIG welding, connect a K870 or K812 Amptrol or a K814 Ar c Start switch to the Remote Receptacle.
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 OPERA TION B-16 B-16 SQUARE W A VE TIG 355 T ABLE B.
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 OPERA TION B-17 B-17 SQUARE .
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 OPERA TION B-18 B-18 SQUARE .
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 OPERA TION B-19 B-19 SQUARE W A VE TIG 355 T ABLE B.
TIG WELDING SEQUENCE OF OPERA TION (2-STEP MODE) Do not leave stick electrode welding cable connected. It will be electrically “hot” when TIG welding. 1. Connect an Amptrol or Ar c Start switch to the Remote Receptacle. 2. T ur n the welder , water supply (if equipped) and gas supply on.
11. Hold the Arc Start switch down until an ar c is established. At this point, the Arc Start Switch can be released, and the weld will continue. Press and r elease the Arc Start switch a second time to stop the arc. When the Afterflow timer completes the cycle, the gas and water valves close.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - ACCESSORIES - Accessories ........................................................................................................................
OPTIONS/ACCESSORIES The following options/accessories are available for your Square W ave TIG 355 from your local Lincoln Electric Distributor . Undercarriage (K841) – Includes a platform, wheels, and brackets for supporting the welder and two gas cylinders.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS -MAINTENANCE- Maintenance ......................................................................................................................... Section D Safety Precautions.
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 MAINTENANCE D-2 D-2 SQUARE W A VE TIG 355 W ARNING SAFETY PRECAUTIONS • Only Qualified personnel should perform this maintenance.
5. If any voltage is present, DISCHARGE EACH INDI- VIDUAL CAP ACITOR as follows: a. Obtain a 500 Ohm resistor . Grip the 500 ohm resistor with insulated gloves and insulated gripping pliers and hold the resistor acr oss the terminals on each capacitor for 20 seconds.
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 MAINTENANCE D-4 D-4 SQUARE W A VE TIG 355 FIGURE D.2 – GENERAL COMPONENT LOCA TIONS 1.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS -THEOR Y OF OPERA TION SECTION- Theory of Operation ................................................................................................
HIGH VOLTAGE TRANSFORMER CIRCUIT REMOTE RECEPTACLE GAS/WATER SOLENOIDS FANS 115VAC RECEPTACLE INPUT CONTACTOR R E C O N N E C T POWER FACTOR CAPACITORS FEED - THRU BOARD CONTRO.
OUTPUT RECTIFICA TION AND FEEDBACK CONTROL The AC output from the main transformer secondary is rectified and contr olled through the SCR bridge. Output current is sensed at the shunt as a low voltage signal and fed back to the control boar d.
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 THEOR Y OF OPERA TION E-4 E-.
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 THEOR Y OF OPERA TION E-5 E-.
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 THEOR Y OF OPERA TION E-6 E-6 SQUARE W A VE TIG 355 AC WELDING OUTPUT Rotating the polarity switch to the AC position changes the welding power circuit.
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 THEOR Y OF OPERA TION E-7 E-.
PROTECTIVE CIRCUITS Protective cir cuits are designed into the Squar e Wave TIG 355 to sense trouble and shut down the machine before the tr ouble damages the internal machine com- ponents. Both thermal protection and curr ent over- load are included.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS -TROUBLESHOOTING & REP AIR SECTION- T roubleshooting & Repair Section ......................................................................
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 TROUBLESHOOTING & REP AI.
ELECTRIC SHOCK can kill. Have an electrician install and ser- vice this equipment. T ur n the machine OFF befor e working on equipment. Do not touch electrically hot parts. Sometimes machine failures appear to be due to PC board failur es. These problems can sometimes be traced to poor electrical connections.
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 TROUBLESHOOTING & REP AIR F-4 F-4 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-5 F-5 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-6 F-6 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
TROUBLESHOOTING & REP AIR F-7 F-7 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do not understand th.
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 TROUBLESHOOTING & REP AIR F-8 F-8 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-9 F-9 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
TROUBLESHOOTING & REP AIR F-10 F-10 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-11 F-11 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-12 F-12 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
TROUBLESHOOTING & REP AIR F-13 F-13 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-14 F-14 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-15 F-15 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-16 F-16 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-17 F-17 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-18 F-18 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 TROUBLESHOOTING & REP AIR F-19 F-19 SQUARE W A VE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 INPUT POWER F ACTOR CAP ACITOR VOL T AGE CHECK AND DISCHARGE PROCEDURE Service and repair should be performed by only Lincoln Electric factory trained personnel.
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 SQUARE W A VE TIG 355 F-21 F-21 INPUT POWER F ACTOR CAP ACITOR VOL T AGE CHECK AND DISCHARGE PROCEDURE (continued) TROUBLESHOOTING & REP AIR TEST PROCEDURE 1.
ARC ST AR T TRIGGER CIRCUIT TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-23 F-23 ARC ST ART TRIGGER CIRCUIT TEST (continued) FIGURE F .2 – 6-PIN AMPHENOL RECEPT ACLE TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the screws and car efully lower the front control panel.
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 SQUARE W A VE TIG 355 F-24 F-24 ARC ST ART TRIGGER CIRCUIT TEST (continued) TROUBLESHOOTING & REP AIR FIGURE F .
POWER BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-26 F-26 POWER BOARD TEST (continued) FIGURE F .4 - POWER BOARD TEST POINTS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the screws and car efully lower the front control panel.
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-27 F-27 POWER BOARD VOL T .
INPUT CONT ACTOR TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-29 F-29 INPUT CONT ACTOR TEST (continued) FIGURE F .5 - INPUT CONT ACTOR TEST POINTS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the machine top and sides. 3. Locate the two leads, #243 and #244, con- nected to the input contactor coil.
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 SQUARE W A VE TIG 355 F-30 F.
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 SQUARE W A VE TIG 355 F-31 F-31 TROUBLESHOOTING & REP AIR INPUT CONT ACTOR TEST (continued) FIGURE F .
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 SQUARE W A VE TIG 355 PILOT TRANSFORMER TEST Service and repair should be performed by only Lincoln Electric factory trained personnel.
F-33 F-33 PILOT TRANSFORMER TEST (continued) FIGURE F .7 - PILOT TRANSFORMER CONNECTIONS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the machine top and sides. 3. Locate terminals X1 and X2 connected to the pilot transformer secondary .
FEED-THRU PC BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-35 F-35 FEED-THRU PC BOARD TEST (continued FIGURE F .8 - FEED-THRU PC BOARD LOCA TION TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the machine top and sides. 3. Perform the power factor capacitor dis- char ge procedure.
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 SQUARE W A VE TIG 355 F-36 F-36 FEED-THRU PC BOARD TEST (continued ) TROUBLESHOOTING & REP AIR FIGURE F .
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-37 F-37 FEED-THRU PC BOARD.
PROTECTION PC BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
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-39 F-39 PROTECTION PC BOARD TEST (continued) FIGURE F .11- PROTECTION PC BOARD LOCA TION AND MOUNTING DET AILS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1.
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 SQUARE W A VE TIG 355 F-40 F.
MAIN TRANSFORMER TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-42 F-42 MAIN TRANSFORMER TEST (continued) FIGURE F .12 - MAIN TRANSFORMER LOCA TION AND WIRING DET AILS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the machine top and sides.
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 SQUARE W A VE TIG 355 F-43 F-43 MAIN TRANSFORMER TEST (continued) TROUBLESHOOTING & REP AIR 7.
CONTROL TRANSFORMER (T5) VOL T AGE TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-45 F-45 CONTROL TRANSFORMER (T5) VOL T AGE TEST (continued) FIGURE F .13 - LOCA TION OF CONTROL BOARD AND CONTROL TRANSFORMER TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16” nut driver , remove the machine case top and sides.
F-46 F-46 CONTROL TRANSFORMER (T5) VOL T AGE TEST (continued) FIGURE F .14 – PLUG P4 DET AILS TROUBLESHOOTING & REP AIR 6. Check fuse F1 (0.5 amp). T est the resis- tance from 6J15, on the feed-thru PC board, to the #265 lead at the contr ol trans- former .
CONTROL PC BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-48 F-48 CONTROL PC BOARD TEST (continued) FIGURE F .15 – CONTROL PC BOARD LOCA TION TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove input power to the machine. 2. With the 5/16” nut driver , remove the screws and car efully lower the case front control panel.
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 F-49 CONTROL PC BOARD TEST (continued) FIGURE F .
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-50 F-50 CONTROL PC BOARD T.
ST A TIC SCR TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
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-52 F-52 ST A TIC SCR TEST (continued) FIGURE F .17 – POWER PC BOARD PLUG LOCA TIONS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1.
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-53 F-53 ST A TIC SCR TEST (continued) FIGURE F .
ACTIVE SCR TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
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-55 F-55 ACTIVE SCR TEST (continued) FIGURE F .19 - POWER BOARD PLUG LOCA TIONS TROUBLESHOOTING & REP AIR TEST PROCEDURE 1.
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-56 F-56 ACTIVE SCR TEST (continued) FIGURE F .
F-57 F-57 ACTIVE SCR TEST (continued) FIGURE F .21 - SILICON CONTROLLED RECTIFIER TEST SETUP . TROUBLESHOOTING & REP AIR SILICON CONTROLLED RECTIFIER TEST (Heat Sink Mounted Units) T o test the SCRs, construct the circuit outlined in Figure F .21.
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-58 F-58 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 50 volts SCOPE SETTINGS V olts/Div .
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 F-59 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 50 volts SCOPE SETTINGS V olts/Div .
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-60 F-60 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 50 volts SCOPE SETTINGS V olts/Div .
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-61 F-61 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 50 volts SCOPE SETTINGS V olts/Div .
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 F-62 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 20 volts SCOPE SETTINGS V olts/Div .
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-63 F-63 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 20 volts SCOPE SETTINGS V olts/Div .
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-64 F-64 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 50 volts SCOPE SETTINGS V olts/Div .
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-65 F-65 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 CH1 0 volts 2 ms 50 volts SCOPE SETTINGS V olts/Div .
CONTROL PC BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
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 F-67 CONTROL PC BOARD REMOV AL AND REPLACEMENT (continued) FIGURE F .
POWER PC BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
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 F-69 POWER PC BOARD REMOV AL AND REPLACEMENT (continued) FIGURE F .
INPUT CONT ACTOR REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-71 F-71 INPUT CONT ACTOR REMOV AL AND REPLACEMENT (continued) FIGURE F .24 – INPUT CONT ACTOR CONNECTIONS TROUBLESHOOTING & REP AIR PROCEDURE 1. Remove input power to the machine. 2. With the 5/16" nut driver , remove the case top and sides.
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 F-72 INPUT CONT ACTOR REMOV AL AND REPLACEMENT (continued) TROUBLESHOOTING & REP AIR 13.
F AN MOTOR AND BLADE REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-74 F-74 F AN MOTOR AND BLADE REMOV AL AND REPLACEMENT (continued) FIGURE F .25- F AN MOTOR AND BLADE MOUNTING DET AILS TROUBLESHOOTING & REP AIR PROCEDURE The following procedur e allows you to remove and replace either of the two fans on the Square W ave TIG 355.
OUTPUT RECTIFIER REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
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-76 F-76 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 OUTPUT RECTIFIER REMOV AL AND REPLACEMENT (continued) FIGURE F .
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 F-77 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 OUTPUT RECTIFIER REMOV AL AND REPLACEMENT (continued) PROCEDURE 1.
SCR REMOV AL AND AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty .
F-79 F-79 SCR REMOV AL AND AND REPLACEMENT (continued) TROUBLESHOOTING & REP AIR The unclamping and clamping procedur e out- lined below is critical for the prevention of iner- nal SCR damage. Failure to follow this pr oce- dure may r esult in subsequent damage of the SCR.
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-80 F-80 SCR REMOV AL AND AND REPLACEMENT (continued) TROUBLESHOOTING & REP AIR 8.
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-81 F-81 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 5) Re-inspect the SCR for proper seating.
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-82 F-82 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 B. PROCEDURE FOR THE 5/8 INCH WIDE SPRING: 1) Place a piece of sleeving around each cap screw .
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-83 F-83 TROUBLESHOOTING & REP AIR SQUARE W A VE TIG 355 Clamping procedur e for 1/4-20 cap screws.
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 RETEST AFTER REP AIR Retest .
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 TROUBLESHOOTING & REP AI.
T ABLE OF CONTENTS - ELECTRICAL DIAGRAMS SECTION - SQUARE W A VE TIG 355 Electrical Diagram Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section G Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTES SQUARE W A VE TIG 355 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.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-2 SQU.
NOTE: This diagram is for reference only . It may not be totally applicable to every code covered by this manual. G-3 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 355 Machine Schematic SHUNT (+) SHUNT (-) BACKGROUND RECTIFIER (+) PRIMARY THERMOSTAT PRIMARY THERMOSTAT BACKGROUND RECTIFIER (-) BACKGROUND RESISTOR SCR1 GATE SCR2 GATE SCR3 GATE SCR4 GATE B.
G-4 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 355 Meter PC Board (M15893) Schematic +5V R9 X5 3 4 H Q A C Q Q CLK Q Q Q B Q A1 A2 E F G Q R D 74HC164 X1 6 4 2 12 13 1 10 11 8 5 3 9 X5 11 10 C7 J7 3 3.
G-5 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 355 Feed Through PC Board (L8096) Schematic J15 5 J17 9 3000V C4 .0047 J17 8 C5 .0047 3000V J17 7 J15 6 J15 4 .39mH 1A L4 J15 10 3000V C1 .0047 .39mH L2 J15 2 J17 4 3000V C20 .0047 C2 .0047 3000V J17 6 .39mH 1A L6 3000V C3 .
G-6 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 355 Protection PC Board (M16062) Schematic SUPPLY VOLTAGE NET FRAME CONNECTION COMMON CONNECTION 3000V .0047 C4 J23 1 J23 4 EARTH GROUND CONNECTION POWER SUPPL.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-7 ELECTRICAL DIAGRAMS SQU.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-8 ELECTRICAL DIAGRAMS SQU.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-9 ELECTRICAL DIAGRAMS SQU.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-10 ELECTRICAL DIAGRAMS SQ.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-11 ELECTRICAL DIAGRAMS SQ.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-12 ELECTRICAL DIAGRAMS SQ.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-13 ELECTRICAL DIAGRAMS SQ.
Return to Section TOC Return to Section TOC Return to Section TOC Retur n to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC G-14 ELECTRICAL DIAGRAMS SQ.
An important point after buying a device Lincoln Electric SQUARE WAVE SVM118-A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lincoln Electric SQUARE WAVE SVM118-A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lincoln Electric SQUARE WAVE SVM118-A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lincoln Electric SQUARE WAVE SVM118-A you will learn all the available features of the product, as well as information on its operation. The information that you get Lincoln Electric SQUARE WAVE SVM118-A will certainly help you make a decision on the purchase.
If you already are a holder of Lincoln Electric SQUARE WAVE SVM118-A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lincoln Electric SQUARE WAVE SVM118-A.
However, one of the most important roles played by the user manual is to help in solving problems with Lincoln Electric SQUARE WAVE SVM118-A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lincoln Electric SQUARE WAVE SVM118-A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
