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Troubleshooting
Related Manuals for LOKERMANN GRAND ARC 400 CEL
Summary of Contents for LOKERMANN GRAND ARC 400 CEL
- Page 1 USER MANUAL INVERTER Based Welding Machines GRAND ARC 400 CEL IMPORTANT: Read this OPERATOR MANUAL together with PRESCRIPTION AND COMPLIANCE MANUAL before to use this equipment. In case of loss one of two parts contact immediately your dealer. Allow the operator to consult this manual.
- Page 2 1 INSTALLATION WARNING 2 OVERVIEW 2.1 Features 2.2 Technical Data 2.3 Brief Introduction 2.4 Duty cycle and Over-heat 2.5 Working Principle 2.6 Volt-Ampere Characteristic 3 INSTALLATION & OPERATION 3.1 Layout for the front and rear panel 3.2 Installation & Operation for MMA Welding 3.2.1 Set up installation for MMA Welding 3.2.2 Operation for MMA Welding 3.2.3 MMA Welding...
- Page 3 1. Installation warning This machine is certified according to 60974-10:2014 Arc Welding Equipment Part 10: Electromagnetic compatibility (EMC) requirement and the EUT belongs to Group 2 Class A. WARNING: This Class A equipment is intended for industrial use and it is not intended for use in residential locations where the elctrical power is provided by the public low-voltage supply system.
- Page 4 Maintenance of the arc welding equipment The arc welding equipment should be routinely maintained according to this manual recommendations. All access and service doors and covers should be closed and properly fastened when the arc welding equipment is in operation. The arc welding equipment should not be modified in any way, except for those changes and adjustments covered in this manaul.
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Page 5: Technical Data
Designed to work with diesel generators and to avoid failures due to its voltage spikes. Power source wind tunnel cooling construction for protection against environmental contamination 2.2 Technical Data Models GRAND ARC 400 CEL Parameters Power Supply Voltage (V) 3~380V/400V±10% Frequency(HZ) 50/60... -
Page 6: Brief Introduction
2.3 Brief Introduction MMA series of welding machines adopt the latest Pulse Width Modulation (PWM) technology and the Insulated Gate Bipolar Transistor (IGBT) power modules. It uses switching frequencies in the 20KHz-50KHz ranges so as to replace the traditional line-frequency transformer type welding machines. -
Page 7: Working Principle
2.5 Working Principle The working principle of MMA series of welding machines is shown in the following figure. Three- phase 380V line frequency AC is rectified into DC, then is converted to medium frequency AC by inverter device (IGB T), after reducing voltage by medium transformer (the main transformer) and rectified by medium frequency rectifier (fast recovery diode), and is outputted by inductance filtering. - Page 8 3 Installation & Operation 3.1 Layout for the front and rear panel （1） Negative (-) welding power output connection socket. （2） Positive (+) welding power output connection socket. （3） Input power cable. （4） Power switch: control the power Supply on and off. （5）...
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Page 9: Lift Tig Mode
Arc Force control knob An MMA welding power source is designed to produce constant output current (CC). This means with different types of electrode and arc length; the welding voltage varies to keep the current constant. This can cause instability in some welding conditions as MMA welding electrodes will have a minimum voltage they can operate with and still have a stable arc. -
Page 10: Operation For Mma Welding
(1) Connect the earth lead to “-”, tighten clockwise; (2) Connect the earth clamp to the work piece. Contact with the work piece must be firm contact with clean, bare metal, with no corrosion, paint or scale at the contact point. (3) Connect the electrode lead to “+”, tighten clockwise;... -
Page 11: Mma Welding
NOTE: Note the polarity of wiring, the general DC welding wire in two ways. Selected according to the technical re quirements of welding the appropriate connection, if you choose incorrectly will result in arc instability and spatter large adhesion and other phenomena, such cases can be quickly reversed to joints. - Page 12 Manual metal arc (stick) electrodes have a solid metal wire core and a flux coating. These electrodes are identified by the wire diameter and by a series of letters and numbers. The letters and numbers identify the m etal alloy and the intended use of the electrode.
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Page 13: Arc Length
Welding Current (Amperage) Correct current selection for a particular job is Electrode Size Current Range ø mm (Amps) an important factor in arc welding.With the 2.5 mm 60-95 current set too low, difficulty is experienced in striking and maintaining astable arc. The 3.2 mm 100-130 electrode tends to stick to the work, penetration... -
Page 14: Mma Welding Trouble Shooting
3.2.5 MMA Welding trouble shooting The following chart addresses some of the common problems of MMA welding. In all cases of equipment malfunction, the manufacturer’s recommendations should be strictly adhered to and followed. Trouble Possible Reason Suggested Remedy Check earth lead is connected. Incomplete welding circuit Check all cable connections. -
Page 15: Operation For Tig Welding
3.3 Installation & Operation for TIG Welding 3.3.1 Set up installation for TIG Welding (1) Switch the ON/OFF Switch (located on the rear panel) to OFF. (2) Connect the earth lead to “+”, tighten clockwise; (3) Connect the earth clamp to the work piece. Contact with the work piece must be firm contact with clean, bare metal, with no corrosion, paint or scale at the contact point. -
Page 16: Tig Welding Fundamentals
3.3.3 TIG Welding Fundamentals Stricking the arc for TIG Operation: when tungsten electrode touches the workpiece, the short- circuit current is only 28A . After generating arc, current can rise to the setting welding current. If the tungesten electrode touches the workpiece when welding, the current will drop to 5A within 2s, which can reduce tungsten waste, prolong the using life of the tungsten electrode, and prevent tungsten clipping. -
Page 17: Tig Welding Parameters For Steel
TIG Welding Parameters for Steel DC Current Base Metal Electrode Filler Rod Argon Gas Thickness Mild Steel Stainless Steel Diameter Diameter Flow Rate 1.0mm 40-50 25-35 1.0mm 1.6mm 5LPM 1.6mm 70-90 50-70 1.6mm 1.6mm 7LPM 3.2mm 90-115 90-110 1.6mm 2.4mm 7LPM 3.3.4 DC TIG Welding trouble shooting... -
Page 18: Arc Difficult To Start Or Will Not Start Dc Welding
Incorrect Gas Use pure Argon gas Yellowish residue / Set the gas flow between 10 - 15 l/min smoke on the Inadequate gas flow flow rate alumina nozzle & Increase the size of the alumina gas discoloured tungsten Alumina gas nozzle too small nozzle Connect the torch to the DC- output Torch connected to DC +... -
Page 19: Operation Environment
3.4 Operation environment ▲ Height above sea level ≤1000 M ▲ Operation temperature range -10～+40°C ▲ Air relative humidity is below 90 %( 20°C) ▲ Preferable site the machine some angles above the floor level, the maximum angle does not exceed 15℃. -
Page 20: Troubleshooting
Date Maintenance items Observe that the knobs and switches in the front and at the back of arc welding machine are flexible and put correctly in place. If any knob has not been put correctly in place, please correct. If you can't correct or fix the knob, please replace immediately;... -
Page 22: List Of Error Code
4.3 List of error code Error Type Error code Description Lamp status Yellow lamp(thermal Over-heating(1st thermal relay) protection) always on Yellow lamp(thermal Over-heating(2nd thermal relay) protection) always on Yellow lamp(thermal Thermal relay Over-heating(3rd thermal relay) protection) always on Yellow lamp(thermal Over-heating(4th thermal relay) protection) always on Yellow lamp(thermal... -
Page 23: Electrical Schematic Drawing
4.4 Electrical schematic drawing... - Page 24 LOKERMANN Srl, Via Produzione 16/18, 37044, Cologna Veneta, (VR) Italy, Tel: +39 0442 1722469 lokermann@lokermann.eu -www.lokermann.eu...