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20 

 

Observe that Whether the current output cable is damaged. If it is damaged, it should be 

wrapped up, insulated or changed.   

Monthly 

examination 

Using the dry compressed air to clear the inside of arc welding machine. Especially for 

clearing up the dusts on radiator, main voltage transformer, inductance, IGBT module, the 
fast recover diode and PCB, etc.   

Check up the bolt in arc welding machine, if it is loose, please screw down it. If it is skid, 

please replace. If it is rusty, please erase rust on bolt to ensure it works well. 

Quarter- 

yearly 

examination 

Whether the actual current accords with the displaying value. If they does not accord, 

they should be regulated. The actual current value can be measured by the adjusted 
plier-type ampere meter.   

Yearly 

examination 

Measure the insulating impedance among the main circuit, PCB and case, if it below 

1MΩ,  insulation is thought to be damaged and need to change,  and  need to change or 
strengthen insulation.   

 

§5.2 Troubleshooting 

 

Before arc welding machines are dispatched from the factory, they have already  been 

debugged accurately. So forbid anyone who is not authorized by our company  to do any 

change to the equipment! 

 

Maintenance course must be operated carefully. If any wire becomes flexible or is misplaced, 

it maybe potential danger to user! 

 

Only professional maintenance personal who is authorized by our company  could overhaul 

the machine! 

 

Guarantee to shut off the arc welding machine’s power before turn on the outline  of the 

equipment!

   

 

If there is any problem and has no the authorized professional maintenance personal of our 

company, please contact local our company agent or the branch company! 

 

If there are some simple troubles of GT-

 series

 welding machine, you can consult the 

following overhauling chart:   

S/N 

Troubles 

Reasons 

Solution 

Turn on the power source, and 

fan works, but the power light 
is not on. 

The power light damaged or connection is 
not good 

Test and repair the inside circuit of 
power light 

The transformer of power is broken 

Repair or change the transformer 

Control PCB failures 

Repair or change the control PCB 

Turn on the power source, and 
the  power light is on, but fan 
doesn’t work. 

There is something in the fan

  Clear out 

Summary of Contents for JEFTIG GT Series

Page 1: ...Completely before attempting to use this equipment Save this manual and keep it handy for quick reference Pay particular attention to the safety instructions we have provided for your protection Cont...

Page 2: ...ar panel take GT 1600 for an example 10 4 2 Welding current adjustment 11 4 3 Down slope time for TIG Arc force for MMA adjustment 11 4 4 Welding Operation 11 4 4 1 TIG operation 11 4 4 2 Striking arc...

Page 3: ...tic capacitors ELECTRIC SHOCK CAN KILL Never touch electrical parts Wear dry hole free gloves and clothes to insulate yourself Insulate yourself from work and ground using dry insulation Make certain...

Page 4: ...a respirator may be required Additional precautions are also required when welding on galvanized steel Do not weld in locations near chlorinated hydrocarbon vapors coming from degreasing cleaning or s...

Page 5: ...the proper steps have been taken to insure that such procedures will not cause flammable or toxic vapors from substances inside They can cause an explosion even though they have been cleaned Vent holl...

Page 6: ...the effect of EMF is ongoing all the world Up to now no material evidences show that EMF may have effects on health However the research on damage of EMF is still ongoing Before any conclusion we shou...

Page 7: ...er s power factor to 0 99 So it is non pollution to the power net and it improves the quality of the power supply The welding machine possesses additional function with remote controller The remote ca...

Page 8: ...f welding craft PFC Inverter Medium frequency transformer Medium frequency rectify Hall device Current positive feedback control Single phase AC DC AC DC AC220V AC110V AC DC Rectify Fig 2 1 working pr...

Page 9: ...440 140 230 Weight Kg 9 5 Note The above parameters are subject to change with the improvement of machines 3 2 Duty cycle Over heat The letter X stands for duty cycle which is defined as the proportio...

Page 10: ...on Please refer to the electrode manual Put the switch 4T 2T MMA of the front panel on MMA shelf before doing MMA welding 3 3 2 Assembling the equipment TIG Ar workpiece DCEN torch GT 1600 GT 1600 Rea...

Page 11: ...r to 5 4 for detailed connection Those two pipe holder in packing list 5 3 are used to connect strength pipe with argon gas bottle and shield gas connector Consumable parts for TIG torch such as tungs...

Page 12: ...itch the power pilot lamp is on switching off the switch the lamp is off 2 Alarm pilot lamp When the welder is over voltage less voltage over current or over heated the alarm pilot lamp will be on 3 L...

Page 13: ...elding current adjustment Take GT 1600 for an example The adjusted welding current range is 5 160A GT series welders have the function of pre set welding current Having this function is not only conve...

Page 14: ...lding current t3 t4 Press the gun switch again The output current will drop to 5A within the pre set time t4 t5 Output crater current the setting value is 5A t5 Loosen the gun switch stop arc and argo...

Page 15: ...ce the waste of tungsten electrode and prolong its usage time MMA During the welding operation if the electrode touches the workpiece to form short circuit after 2s the welding current will drop to 0A...

Page 16: ...ee motions to being matched in the end of electrode the electrode moving to the molten pool along axes the electrode swing right and left the electrode moving along welding way The operator can choose...

Page 17: ...hing The corresponding relationship between gas nozzle diameter and electrode diameter Gas nozzle diameter mm Electrode diameter mm 6 4 0 5 8 1 0 9 5 1 6 or 2 4 11 1 3 2 Notice the above parameters or...

Page 18: ...tainless steel single run welding Workpiece thickness mm Joint form tungsten electrode diameter mm welding wire diameter mm Argon gas flow rate L min 1 welding current DCEP Welding speed cm min 1 0 8...

Page 19: ...chine against heavy rain or in hot circumstance against direct sunshine The content of dust acid corrosive gas in the surrounding air or substance can not exceed normal standard Parameters of piping b...

Page 20: ...ch no load voltage may be exported Do not touch the output electrode with any part of your body Before operation no concerned people should be left Do not watch the arc in unprotected eyes Ensure good...

Page 21: ...department if there are no accessories After turn on power watch listen to that whether the arc welding machine has shaking whistle calling or peculiar smell If there is one of the above problems fin...

Page 22: ...dispatched from the factory they have already been debugged accurately So forbid anyone who is not authorized by our company to do any change to the equipment Maintenance course must be operated caref...

Page 23: ...valve Remove it Electromagnetic valve is damaged Change it 8 When welding it is hard to strike arc or easy to stick MMA Connector is loose or connection is not good Check and screw it There is oil or...

Page 24: ...2 OC1 OC2 Pr1 AC110 220 50 60H Z C14 R13 C15 R14 OUT Lf OUT FAN LED1 Pr3 R5 IGBT1 IGBT2 IMOUT HF QF QD8 QD3 QD1 QD2 IFB OT AC3 AC4 R3 C2 C1 R4 C12 C8 C7 C6 C11 C10 C9 C13 R11 R12 IGBT D Rs L boost C...

Page 25: ...23 APPENDIX 2 The electric drawing of Gun Switch 1 2 3 1 2 3 GU N SW ITC H Aer ial socket...

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