Page 2
Thank you for selecting QUALITY Lincoln Electric products. Please examine the packaging and equipment for damage. Claims for material damaged in shipment must be notified immediately to the authorized dealer from whom you purchased the machine. For future reference, please record your equipment identification information in the table below. Model Name, Code &...
Page 3
SAFETY WARNING ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING. BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS. ELECTRIC AND ELECTRIC SHOCK MAGNETIC FIELDS...
Page 4
SAFETY FUMES AND GASES WELDING SPARKS can be dangerous. can cause fire or explosion. 4.a Welding may produce fumes and gases hazardous to health. Avoid breathing these 6.a Remove fire hazards from the welding area. If fumes and gases. When welding, keep your this is not possible, cover them to prevent the head out of fume.
For any maintenance or repair operation it is recommended to contact the nearest technical service center or directly consult the machine division of the Shanghai Lincoln Electric. Maintenance or repairs performed by unauthorized service center or personnel will void the manufacturer’s warranty.
INSTALLATION refer to Figure A.1 on this page. SAFETY PRECAUTIONS Read the entire installation section before starting Make sure the amount of power available from the input installation. connection is adequate for normal operation of the WARNING machine. Refer to the Technical Specifications at the beginning of this Installation section for recommended ELECTRIC SHOCK can kill.
OPERATION GRAPHIC SYMBOLS THAT APPEAR ON THIS MACHINE OR IN THIS MANUAL HIGH FREQUENCY TOUGH START TIG SPOT TIG AC-SQUARE WAVE AC-TRIANGLE AC-SINE WAVE WAVE 2-STEP 2-STEP REPEAT 4-STEP 4-STEP REPEAT PULSE PULSE OFF LOW FREQUENCY PULSE SETTING HIGH FREQUENCY MEMORY SAVE PROCEDURE RECALL...
Page 9
OPERATION MMA WELDING WATER-COOLING SWITCH REMOTE CONTROL BRIGHTNESS CONNECTION CONNECTION NORMAL FAULTY WATER-COOLING SCREEN LOCKED PROTECTION OUTPUT IGBT OUTPUT IGBT TOP DOWN TUBE TUBE PROTECTION PROTECTION OVER/LOW OVER CURRENT VOLTAGE PROTECTION PROTECTION THERMAL RELAY PROTECTION PROTECTION MMA-SQUARE MMA-DC WAVE MMA-TRIANGLE MMA-SINE WAVE WAVE TIG-DC...
Page 10
OPERATION TIG-TRIANGLE TIG-SPOT WAVE ARC FORCE LANGUAGE Rev. 05 ® OPTIMARC AC/DC 350-TP...
OPERATION thermal protection symbol will be displayed on the SAFETY PRECAUTIONS screen. When the machine has been cooled to a safe Read this entire section of the operating temperature, the thermal protection symbol will disappear instructions before operating the machine. and the machine may resume normal operation.
OPERATION output signal - 7. COOLED WATER OUTLET Reserve Connected with water inlet of water-cooling TIG torch as Reserve being operated. 8. PROTECTIVE GAS OUTLET 15. GROUNDING CABLE CONNECTION Connected with gas inlet of TIG torch as being operated. Connect the grounding cable to the paint-free location on the case back.
OPERATION RECALLED FAULTS REMOTE LOCK PROCEDURE FUNCTION IDENTIFICATION SETTING NUMBER CONFIGURATION STATUS SCREEN WELDING STATUS WELDING CURRENT & VOLTAGE WELDING WAVEFORM CURRENT WELDING PARAMETER PARAMETERS SETTING WELDING OUTPUT CRATER PULSE SETTINGS MEMORY MODES WAVEFORMS MODES FIGURE B.3 OUTPUT WAVEFORMS Click the selector button (item 3 in FIGURE B.1), menu bar on the bottom will be selected with a black square The setup procedures are same as above.
Page 14
OPERATION 4-Step Brightness, the range is 1-10. The factory default setting is 7; Language, 0-English,1-Chinese. The 4-Step Repeat factory default setting is 0. You can refer to the ‘TIG Trigger Sequences’ in B-9 FACTORY section for more details. FUNCTION VALUE SETTING 0: OFF PULSE...
OPERATION WELDING WAVEFORM It illustrates the welding parameters. For changing the welding parameter, choose the target parameter by It illustrates the various welding waveforms. rotating the selector button (the name and unit of parameter will be displayed on the ‘current parameter setting’...
OPERATION Release the TIG torch trigger. The machine will decrease the output current in downslope time, the output is turned OFF until reached the crater current. The gas valve will remain open to continue the flow Water-cooling protection of the shielding gas until post flow time is over. 2-Step Repeat Trigger Sequence With the 2-Step Repeat trigger mode and a TIG welding Output IGBT Top tube protection...
OPERATION B-10 B-10 When the TIG torch trigger is released, the output of the machine is turned OFF and the post flow time will start. The gas valve will remain open to continue the flow of the shielding gas until post flow time is over. 4-Step Repeat Trigger Sequence With the 4-step Restart trigger mode and a TIG welding mode selected, the following welding sequence will occur.
OPERATION B-11 B-11 List of parameters and Factory Configuration program: Min Step Factory Mode Parameter Name Selectable Value Range Setting Rate Pre-flow time 0.1~15S 0.1S 0.5S Initial current 0~200% (Percentage of the welding current) Upslope 0~15S 0.1S 0.5S 4~350A 150A Welding Current Downslope 0~15S...
TROUBLESHOOTING If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your local authorized Lincoln Electric CAUTION Field Service Facility for technical assistance. Observe all Safety Guidelines detailed in the beginning and throughout this menual.
Page 20
TROUBLESHOOTING If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your local authorized Lincoln Electric CAUTION Field Service Facility for technical assistance. Observe all Safety Guidelines detailed in the beginning and throughout this menual.
NOTES • World’s Leader in Welding and Cutting• THE SHANGHAI LINCOLN ELECTRIC COMPANY No. 195, Lane 5008, Hu Tai Rd. Baoshan, Shanghai, PRC 201907 www.lincolnelectric.com.cn Rev. 05 ® OPTIMARC AC/DC 350-TP...
Page 23
P‐7097 2017.10 Rev. 01 PARTS LIST FOR OPTIMARC® AC/DC 350‐TP...
Page 25
P‐7097 Rev. 01 PA‐2 OPTIMARC® AC/DC 350‐TP For code: 76251, 76252 Do Not use this Parts List for a machine if its code number is not listed. For any code numbers not listed, contact the Service Department via: china_service@lincolnelectric.com. Use the Illustration of Sub-Assemblies page and the table below to determine which sub assembly page and column the desired part is located on for your particular code machine.
Page 26
P‐7097 Rev. 01 PB‐1 Case Front Assembly OPTIMARC® AC/DC 350‐TP 2017.10 ...
Page 27
P‐7097 Rev. 01 PB‐2 Case Front Assembly ITEM DESCRIPTION PART NO. QTY. 76251 Case Front Welded Assembly G5874-12 76252 ST4.8x13 Hex Self Tapping Screw (Not Shown) S26738-2 Control Panel Decal G6082-55 Control Panel Decal G6082-56 AC/DC 350-TP Decal G6082-57 Knob T13639-6 Water Valve Assembly, Includes: M22042-7 Water Valve Connect Tube (with two 7/16-20 UNF Nuts)