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USER MANUAL
Welding Method and Specifications
MMA Arc Welding Machine
Phase
380V - 3Ph
2.5 - 5 mm
askaynak
www.
.com.tr

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Summary of Contents for Express Weld Inverter 251-ULTRA

  • Page 1 USER MANUAL Welding Method and Specifications MMA Arc Welding Machine Phase 380V - 3Ph 2.5 - 5 mm askaynak www. .com.tr...
  • Page 2: Table Of Contents

    Table of Contents Safety in Welding 3 - 4 General Features Installation and Operator Instructions Preparation for Operation 7 - 9 Maintenance and Troubleshooting 10 - 14 15 - 16 Electromagnetic Compatibility Efficient Use of Machine In Terms of Power Consumption Accessories Given With Machine Transportation and Storage Conditions Expiry of Machine's Physical Life...
  • Page 3 "Expressweld" is the registered trademark of Kaynak Tekniği Sanayi ve Ticaret A.Ş.
  • Page 4: Safety In Welding

    Safety in Welding - 1 This machine has been designed for arc welding with shielded metals. Cannot be used for any other purpose. Only qualified personnel should use this machine. Be sure that all installation, operation, maintenance and repair procedures are performed only by qualified person. Before operating the machine read and understand the operation manual.
  • Page 5: Safety In Welding

    Safety in Welding - 2 ELECTRICALLY POWERED EQUIPMENT: Turn off input power using the switch at the fuse box before working on the equipment. Electrical connections should be performed adequate to the obligated rules. GROUNDING: For your safety and trouble-free operation, electrical supply cables should be connected to a proper grounded receptacle.
  • Page 6: General Features

    General Features EXPRESSWELD Inverter 251-ULTRA, is an inverter welding machine which is manufactured by using the latest inverter technology and inverter arc welding power units is a technology that has been emerged as of 1980s in international market. 50Hz/60Hz frequency is converted to 20 KHz and higher, in other words to high...
  • Page 7: Installation And Operator Instructions

    Installation and Operator Instructions Read this entire section before installation or operation of the machine. Location and Environment: However, it is important that simple preventative measures are followed to assure long life and reliable operation. 1 - Do not put or operate the machine on a surface that is inclined above 15°. 2 - The machine must be operated in an environment with fresh air flow and there musn't be any factor that blocks or stops the ventilation or fresh air flow.
  • Page 8 Preparation for Operation -1 Input Cable Connection / Controller and Usage Features: Before starting the machine, check input voltage, phases and frequency. Input voltage values to be used are determined in “Specifications” sections of the user manual and in the plate located on the machine. Make sure that the grounding of the cables connecting the machine to mains supply are suitable and sufficient amount of current for normal operation of the machine can be supplied.
  • Page 9: Preparation For Operation

    Preparation for Operation REAR PANEL 1 - Power Indicator Lamp: Indicates that the machine is active. 2 - Welding Current Adjusting Knob: Adjusts machine's output current (welding ampere). 3 - Digital Ammeter: Indicates machine's output current value. 4 - Positive (+) Connector: Positive (+) output connection for welding current. 5 - Negative (-) Connector: Negative (-) output connection for welding current.
  • Page 10 It is useful to adjust welding current according to the values specified in catalog of manufacturer company of the shielded welding electrode. Expressweld Inverter 251-Ultra is a descending characterized welding machine for melting stick welding electrodes in 2.5 and 4.0 mm diameter having rutile and basic characterized shielding.
  • Page 11 Maintenance & Troubleshooting - 1 In order to work the welding machine with high efficiency and in safe, periodical maintenance is required. The operator is supposed to understand the maintenance procedures, to be used to machine, to be able to make basic controls by self, and eliminate the operator mistakes. Maintenance details are given below.
  • Page 12: Maintenance And Troubleshooting

    Maintenance and Troubleshooting - 2 THREE-MONTH MAINTENANCE Check if the actual current value is same with the current value set with potentiometer. Actual current value is measured with clamp meter. Caution! For every kind of maintenance and repair operations, contact to the nearest authorized Kaynak Teknigi Sanayi ve Ticaret A.S.
  • Page 13 Maintenance and Troubleshooting - 3 PROBLEM POSSIBLE PROBLEM SOLUTION Machine does not On/Off switch is faulty. Change the switch. If necessary, operate, there is no contact service. output, fan does not operate (continue). Input filter and/or power Contact service. card are faulty. Arc is not stabile, Pole connections are Change the poles as to be correct...
  • Page 14 Maintenance and Troubleshooting - 4 PROBLEM POSSIBLE PROBLEM SOLUTION Fuse trips when the Input filter card is faulty. Contact service. master switch of the machine is on. Current adjusting Welding current cannot Contact service. potentiometer on the be set correctly. front panel is damaged or doesn't operate smoothly.
  • Page 15 Maintenance and Troubleshooting - 5 PROBLEM POSSIBLE PROBLEM SOLUTION When the machine Something get jammed Remove jammed piece. turns on, power in fan blades. indicator lamp lights on, but fan does not Fan capacitor is faulty. Change the capacitor. If necessary, operate.
  • Page 16: Electromagnetic Compatibility

    Electromagnetic Compatibility - 1 While welding, do not turn on/off the power switch. This situation may cause voltage fluctuations in mains as well as shorten the economic life of the machine. After the power unit is "ON", to make the machine electrically stabilized, the welding operation should be started after 5-10 seconds hold-on duration.
  • Page 17: Efficient Use Of Machine In Terms Of Power Consumption

    Electromagnetic Compatibility - 2 To reduce the effect and exposure level of electromagnetic waves produced by the machine, below warnings should certainly taken into account: 1- Mains supply connection should be performed as explained in the user manual. If electromagnetic interference occurs, it may be necessary to take some precautions like filtering the electric main.
  • Page 18: Transportation And Storage Conditions

    Transportation and Storage Conditions When it is not in use, to protect the machine from the dust and the other possible contaminants in the environment, and particularly when transferring it for long distance, place the welding machine in its box. Do not drop the machine and pay attention against the strong mechanical shocks.
  • Page 19: Spare Parts

    Spare Parts - 1...
  • Page 20: Spare Parts

    Spare Parts - 2 Part Number Amount Part Description 82U8253035 Handle 82U8301001 Machine Cover 82U7732115-F Auxiliary Transformer 82U5496354-A Control PCB 82U5496908-B EMC kartı 82U7202029 Fuse Holder Fuse 82U7202123 82U8068004 Rear Panel 82U7232020 Switch (CA20B A202 K&N 25A) 82U8307008 Rear Panel Asbly Plate 82U7720030 82U7463135 Capacitor...
  • Page 21: Electrical Connection Diagram

    Electrical Connection Diagram - 1 INPUT 3 ~380V INVERTOR CARD POWER SUPPLY CONTROL CARD current arc-force hot-start power unit lamp K: On/Off Switch K: On/Off Switch T1: Bridge Diode T1: Bridge Diode Pr0: Soft Switch Card Pr0: Soft Switch Card C3: Capacitor C3: Capacitor B1: Main Transformer...
  • Page 22: Electrical Connection Diagram

    Electrical Connection Diagram - 2 FRONT CONTROL CARD C1, C2: Capacitor T2: IGBT Module C4, C5: Absorb Capacitors H: Current Sensor L: Inductance 0T1: IGBT Protective Circuit B2: Auxiliary Transformer F: Fan...
  • Page 23: Manufacturer

    askaynak www. .com.tr Manufacturer Kaynak Teknigi Sanayi ve Ticaret A.S. TOSB - Taysad Organize Sanayi Bolgesi, 2. Cadde, No: 5, Çayırova 41435 Kocaeli - TURKEY Phone: +(90.262) 679 78 00 Fax: +(90.262) 679 78 26 askaynak www. .com.tr Decembe 2014 - CanO...

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