ESAB LTN 255 User manual
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ESAB LTN 255 is a versatile welding machine designed for TIG and MMA welding, offering precise control, advanced features, and user-friendly operation. With its inverter technology, it ensures low power consumption, compact size, and lightweight design. The LTN 255 is equipped with ARC PLUS technology for enhanced arc stability and penetration, reducing the risk of electrode sticking. It also features adjustable Arc Force control to tailor the arc characteristics to your specific welding needs.
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Aristotig 255 LTN 255 101103105107109111102021110025108024042106023061104022041100020040060001 Bruksanvisning Brugsanvisning Bruksanvisning Käyttöohjeet Instruction manual Betriebsanweisung 0457 328 001 991015 Manuel d’instructions Gebruiksaanwijzing Instrucciones de uso Istruzioni per l’uso Manual de instruções Ïäçãßåò ÷ñÞóåùò Valid for serial no. 745--xxx--xxxx SVENSKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DANSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 NORSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 SUOMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 ENGLISH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 DEUTSCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 FRANÇAIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 NEDERLANDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 ESPAÑOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 ITALIANO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 PORTUGUÊS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 ÅËËÇÍÉÊÁ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Rätt till ändring av specifikationer utan avisering förbehålles. Ret til ændring af specifikationer uden varsel forbeholdes. Rett til å endre spesifikasjoner uten varsel forbeholdes. Oikeudet muutoksiin pidätetään. Rights reserved to alter specifications without notice. Änderungen vorbehalten. Sous réserve de modifications sans avis préalable. Recht op wijzigingen zonder voorafgaande mededeling voorbehouden. Reservado el derecho de cambiar las especificaciones sin previo aviso. Ci riserviamo il diritto di variare le specifiche senza preavviso. Reservamo--nos o direito de alterar as especificações sem aviso prévio. Äéáôçñåßôáé ôï äéêáßùìá ôñïðïðïßçóçò ðñïäéáãñáöþí ×ùñßò ðñïåéäïðïßçóç. -- 2 -- ENGLISH 1 DIRECTIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 56 57 3.1 TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 60 5.1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 Other functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 64 6 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 7 FAULT TRACING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 8 ORDERING OF SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 9 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 SPARE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 TOCe -- 55 -- GB 1 DIRECTIVE DECLARATION OF CONFORMITY Esab Welding Equipment AB, 695 81 Laxå, Sweden, gives its unreserved guarantee that welding power source LTN 255 from serial number 745 complies with standard EN 60974--1, in accordance with the requirements of directive (73/23/EEA) and addendum (93/68/EEA) and standard EN 50199 in accordance with the requirements of directive (89/336/EEA) and addendum (93/68/EEA). -------------------------------------------------------------------------------------------------------------------------------------Laxå 97--10--30 Paul Karlsson Managing Director Esab Welding Equipment AB 695 81 LAXÅ SWEDEN 2 Tel: + 46 584 81000 Fax: + 46 584 12336 SAFETY WARNING ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAUTIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE BASED ON MANUFACTURERS’ HAZARD DATA. ELECTRIC SHOCK -- Can kill S Install and earth the welding unit in accordance with applicable standards. S Do not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing. S Insulate yourself from earth and the workpiece. S Ensure your working stance is safe. FUMES AND GASES -- Can be dangerous to health S Keep your head out of the fumes. S Use ventilation, extraction at the arc, or both, to keep fumes and gases from your breathing zone and the general area. ARC RAYS -- Can injure eyes and burn skin. S Protect your eyes and body. Use the correct welding screen and filter lens and wear protective clothing. S Protect bystanders with suitable screens or curtains. FIRE HAZARD S Sparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby. NOISE -- Excessive noise can damage hearing S Protect your ears. Use ear defenders or other hearing protection. S Warn bystanders of the risk. MALFUNCTION -- Call for expert assistance in the event of malfunction. READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING. PROTECT YOURSELF AND OTHERS! bt19d12e -- 56 -- GB 3 INTRODUCTION Note! This product is solely intended for arc welding. Note: All warranty undertakings given by the supplier cease to apply if the customer attempts to rectify any faults on the machine during the warranty period. LTN 255 are rectifiers designed using inverter technology and are intended for TIG -welding and welding using coated electrodes. Inverter technology contributes towards low power consumption, a low weight and compact dimensions. The advanced electronics with microprocessor control provides, amongst others, quick regulation and top class welding characteristics. LTN 255 is equipped with ARC PLUS, a new type of control that with MMA welding provides a more intensive, more concentrated and smoother arc. It reacts quicker after a short circuiting drop transfer, which reduces the risk of the electrode sticking. In addition, the machine is equipped with Arc Force, which means that the power source’s dynamics can be adjusted, softer or harder depending on the type of electrode and the welder’s preference. ARC PLUS -- because of the regulator’s good characteristics it is only necessary to change the Arc Force settings in exceptional circumstances. When drop welding using stainless steel electrodes a special feature on the machine can be activated to facilitate welding. LTN 255 is available in two designs, one with a central connector and one with an OKC connector for a TIG torch. LTN 255 is supplied complete with a 5 metre mains cable, 5 metre return cable, gas hose and hose clips. Machines with a central connector are also fitted with a safety bar to protect the connectors from impact. As an accessory there is a loop handle to fit on the machines which acts as a cable reel as well protecting the control panel. There are also two carriages available for transportation with a gas cylinder and cooling unit. bt19d12e -- 57 -- GB 3.1 TECHNICAL DATA Permitted load at 35 % duty cycle, TIG 35 % duty cycle, MMA 60 % duty cycle 100 % duty cycle 250 A/20 V 250 A/30 V 180 A/27 V 140 A/26 V Setting range, TIG Setting range, MMA 3--250 A 4--250 A Slope up Slope down 0--10 s 0--10 s Gas pre--flow Gas post--flow 0--25 s 0--25 s Pulse time 0,02--5,0 s (0,001--5,0 s) 0,02--5,0 s (0,001--5,0 s) Pause time Open--circuit voltage Open--circuit power Useful Power, P at max current MMA Apparent Power, S at max current MMA 70--80 V 40 W 8,78 kW 13,3 kVa Power factor, at max current MMA Efficiency, at max current MMA Fuse, slow rupture Mains cable,cross section Dimensions lxwxh Weight 0,65 0,85 16 A 4x1,5 mm2 515x285x415 mm 25 kg Application class Class of enclosures IP 23 The welding power sources comply with the requirements set out in IEC 974-- 1 Cable areas acc. to Swedish regulations. The symbol indicates that this power source is designed for use in areas where there is an increased electrical hazard. The IP code indicates the enclosure class, i.e. the degree of protection against penetration by solid objects and water. Equipment marked IP 23 is designed for in-- and outdoor use. bt19d12e -- 58 -- GB 4 INSTALLATION WARNING This product is intended for industrial use. In a domestic environment this product may cause radio interference. It is the user’s responsibility to take adequate precautions. Mains voltage Mains frequency Fuse, slow rupture Mains cable, cross section Welding cable, cross section 400 V ¦ 10 % , 3--phase 50--60 Hz 16 A 4x1.5 mm2 35 mm2 LTN 255 are equipped with mains voltage compensation, which means that a ¦10 % variation in the mains voltage only results in a ¦0,2 % variation in the welding current. To reduce the voltage drop when using a long cable it can be advisable to select a heavier cable cross section. 1. Place the equipment in a suitable place and make sure the rectifier is not covered or set--up so that cooling is prevented. 2. Make sure the machine is connected to the correct mains voltage. Earth according to applicable directives. 3. Connect the shielding gas. 4. Connect the TIG torch and the return cable or the MMA welding cables. The machine is now ready for welding. bt19d12e -- 59 -- GB 5 OPERATION 4 5 3 2 8 1 9 10 11 12 7 6 1. Mains power switch 9. Gas nipple (connection of gas cylinder) 2. Yellow indicating lamp 10. Connection for TIG torch 3. White indicating lamp 12. Connection for return cable when TIG welding ldi 4. Display 5. Setting knob 6. Push--buttons The welding cable and return cable should be t d tto 11 and d 12 connected 7. Remote control connection 8. Dust filter When the main power switch is switched on the white indicating lamp, on the front, comes on. To take your mind off the risk of overloading the machine it has been equipped with an integrated thermostat that trips if the temperature becomes too high. When this occurs the welding current is cut out and the yellow indicating lamp comes on. In addition, the error code ”E13” is displayed. When the temperature has dropped the thermostat automatically resets. bt19d12e -- 60 -- GB 5.1 Control panel On the front of the machine there is a control panel for the selection of functions and setting of parameters. This consists of a display, setting knob, LEDs and push--buttons. By using the push--buttons you can move between the different functions. The selected function is indicated by respective LEDs coming on. One line at a time is set. The current line is indicated by a red LED. Movement between lines takes place using the red arrow keys. Movement within each line takes place using the green arrow keys. All settings are made using the setting knob. The LEDs to the right of the display indicate the actual unit (ampere/volt/seconds). On the lines where only a function is selected, ”------” is shown on the display. Description of the functions: S S S S Line 1 Line 2 Line 3 Line 4 S Line 5 S S Line 6 Line 7 bt07d002 Line 1 bt19d12e TIG welding or MMA welding If MMA welding is chosen, the current is set here and lines 2--5 are ignored. -- 61 -- GB Line 2 TIG/HF ignition or TIG/Liftarc ignition bt07t001 Place the electrode against the workpiece. Press in the torch switch. To stop--release the torch trigger. Tilt the torch a little, lift and an arc is produced. bt07t002 Line 3 Continuous current or pulsed current O O -- O Line 4 2 step or 4 step trigger action 2 step trigger action means that the arc is ignited when the torch trigger is pressed in and is extinguished when the trigger is released. 4 step trigger action means that when the torch trigger is pressed in ”1” the machine starts with the pilot current and then slopes up to the set current when the trigger is released ”2”. When the trigger is pressed in again ”3” the machine slopes down to the pilot current. The arc is extinguished when the trigger is released ”4”. bt07d003 bt19d12e -- 62 -- GB Line 5 Parameter setting 1. Gas pre flow 2. Slope up 3. Pulse current or continuous current 4. Pulse time 5. Pause current 6. Pause time 7. Slope down 8. Gas post flow 0--25 s 0--10 s 3--250 A 0,02--5,0 s (0.001--5.0 s) 3--250 A 0.02--5.0 s (0.001--5.0 s) 0--10 s 0--25 s Line 6 Measurement instrument Shows the welding current or arc voltage during the present welding run. The measurement instrument has a hold function that locks the measurement value when the welding run is stopped. Line 7 Welding data memory O O 1 O 2 O1--2 O A Four different sets of welding data settings can be stored in the machine’s memory, two for TIG mode and two for MMA mode. The following can be stored: TIG: selected option from line 3 (continuous or pulsed current) All settings on line 5. MMA: Welding current The welding data memory is changed using the green arrow keys. Changes can also be made by quickly pressing the torch trigger, regardless of whether you are welding or not. To activate the possibility of jumping between programs both the green arrow keys should be pressed simultaneously. When the jump function is activated an indicating lamp comes on. O 1--2 If the 4 step trigger action is selected, quickly pressing the trigger will switch the welding data. The same thing applies in 2 step trigger action if you are not welding. During welding, using 2 step trigger action, you release the trigger momentarily to change the welding data. Aristotig has battery backup so that the settings remain in memory even when the machine is switched of or disconnected from the power supply. bt19d12e -- 63 -- GB 5.2 Other functions Drop welding (MMA) Drop welding can be used when welding with stainless steel electrodes. The technique involves the arc switching between igniting and extinguishing to allow better control over the heat transfer. The electrode only needs to be lifted a little for the arc to be extinguished. The machine should be in the current setting mode when the function is activated. Press both of the green arrow keys simultaneously for 2 seconds and the symbol ”--_--” indicates that the function is activated. This mode remains active even if the machine is switched off. The machine is reset for normal welding again using the same method and ”------” is then indicated on the display. Arc Force (MMA) The Arc Force setting changes the machine’s dynamic. A softer or harder arc can be obtained. The machine should be in the current setting mode when activating the function by pressing the two red arrow keys simultaneously for 2 seconds. The display shows a value between 0 and 100. The higher the value the harder the arc. Press one of the buttons and the power source returns to the normal operating mode. The set Arc Force value remains. Different Arc Force settings can be stored in the machine’s two sets of welding data memory. Pulse time/Pause time (TIG) Normally the setting range for these parameters is 0.02--5.0 s. Through pressing the two green arrows simultaneously for 2 seconds, times down to 0.001 s can be set. This extended setting range remains until the machine is reset using the same method. When activating the function the machine should be in the mode for setting the pulse time/pause time. Note that times below 0.250 s are displayed without the decimal point. Remote control Using the remote control socket on the machine the current can be remotely regulated in TIG and MMA modes. If pulsed current is selected in TIG mode, it is the pulsed current that is remotely regulated. The set value from the remote control is shown on the display by stepping to the position where the current should be set when not using the remote control. Switching to the remote mode takes place automatically when the unit is connected. A This is confirmed by the LED coming on. O (NOTE! the pins L and M in the remote control’s connecting plug must be strapped for automatic connection to take place). The following remote controls can be connected: PHA1, PHA2, PHA5, PHB1, PHB2, PHC2 and FS002. NOTE! When using FS002 the slope--up and slope--down times should be set to 0 sec. bt19d12e -- 64 -- GB 6 MAINTENANCE Generally, Aristotig 255 do not require any maintenance. Normally, it is sufficient to blow out the machine using clean, compressed air annually, and the dust filter should be cleaned regularly. If the machine is set up in dusty or dirty environments the machine and dust filter should be cleaned more often. Dismantling the filter. bt07d109 7 FAULT TRACING Error Codes LTN 255 is equipped with integrated error monitoring. If an error should occur then an error code is displayed. The error codes are as follows: E01 E02 E03 E04 E05 E06 E10 E11 E13 E14 Memory error, internal RAM Memory error, external RAM Memory error, EPROM Memory error, random test of battery backed up RAM Memory error, variable value outside limit in battery backed up RAM Low battery voltage Incorrect supply voltage 20 V Incorrect supply voltage --15 V High temperature, thermal switch protection Current--servo error The error indications are shown if the machine is not able to maintain the set current, for example, while MMA welding with an extremely long arc. The indication should disappear after welding for a few seconds under normal conditions. If any of these error codes are displayed permanently or recur frequently the machine should be taken to an authorized ESAB service workshop to be rectified. bt19d12e -- 65 -- GB 8 ORDERING OF SPARE PARTS When ordering parts please state the machine model, serial number, and the name and spare part number as shown in the list of spare parts. This will simplify dispatch and ensure you get the right parts. 9 ACCESSORIES Order number Cooling unit OCF 2L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0457 216--880 Carriage for 5 l gas cylinder . . . . . . . . . . . . . . . . . . . . . . . 0468 530 880 Carriage for 10--50 l gas cylinder . . . . . . . . . . . . . . . . . . 0456 804 880 Protective guard for connections Handle loop . . . . . . . . . . . . . . . . . . 0468 311 001 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0468 305 880 Return cable, 35 mm2 (state the length when ordering) . . . . . . . . . . . . . . . . . . . 02626 136 02 Return cable clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0367 558 880 Foot pedal FS002, incl. cable . . . . . . . . . . . . . . . . . . . . . 0349 090 886 Welding cable, 5 meter . . . . . . . . . . . . . . . . . . . . . . . . . . . 0468 539 882 Return cable, 5 meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0468 539 883 TIG torch: Information on additional TIG torches and remote control units can be found in separate brochures. bt19d12e -- 66 -- GB Carriage for 10--50 l gas cylinder Carriage for 5 l gas cylinder Protective guard LIFTING INSTRUCTIONS bt07t003 Handle loop bt07t004 bt19d12e -- 67 --
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