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Thank you for selecting the R-Tech MMA160S Inverter Arc Welder.   
  
The MMA160S has many benefits over traditional Arc welders, including an industrial 60%  
duty cycle, Anti-stick hot start technology, portable and lightweight 
 
We want you to take pride in operating our MMA160S as much pride as we have taken in 
making this product for you. Please read all information in this manual before operation 
 

 

PLEASE EXAMINE THE CARTON AND EQUIPMENT FOR DAMAGE IMMEDIATELY 

 

When this equipment is shipped, title passes to the purchaser upon receipt from the courier.  
Consequently all claims for material damaged in shipment must be made by purchaser against 
the transportation company used.  

Please record your equipment identification below for future reference. This information can be 

found on the data plate at rear of machine.  

Product: MMA160S 

Serial No. ___________________________________  

Date of Purchase _____________________________  

Where Purchased _____________________________  

Whenever you request replacement parts or information on this equipment please always 

supply information you have recorded above. 

This product is covered by a 2 year parts and labour warranty; we will cover the cost of collecting and 

returning the item to you. External items, (

torch, earth lead etc…) are covered by a 3 month warranty. Any 

faults/damage found caused by a customer will be charged accordingly. 

 

Pay particular attention to the safety instructions we have provided you for your protection  
The level of seriousness to be applied to each section is explained below  

WARNING 

 

This statement appears where the information must be followed exactly to avoid serious personal injury.  

CAUTION 

 

This statement appears where the information must be following to avoid a minor personal injury or damage 
to this equipment.  

 

Summary of Contents for MMA 160S

Page 1: ...MMA 160S ARC MMA WELDER OPERATION INSTRUCTIONS www r techwelding co uk ...

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Page 3: ...te at rear of machine Product MMA160S Serial No ___________________________________ Date of Purchase _____________________________ Where Purchased _____________________________ Whenever you request replacement parts or information on this equipment please always supply information you have recorded above This product is covered by a 2 year parts and labour warranty we will cover the cost of collec...

Page 4: ...city of 160 Amps Equipment Limitations The R Tech MMA160S is protected from overloads beyond the output ratings and duty cycle as per machine specifications with thermostat protection of the output coils and rectifiers Welding Capability Duty Cycle The R Tech MMA160S is rated at 160 Amps at 60 duty cycle on a ten minute basis If the duty cycle is exceeded a thermal protector will shut machine off ...

Page 5: ...particles towards the welder An abundance of conductive material can cause plant failure Stacking This machine cannot be stacked Transport Unloading Never underestimate the weight of equipment never move or leave suspended in the air above people Use recommended lifting equipment at all times WARNING Falling Equipment can cause injury Never lift welder with gas bottle attached Never lift above per...

Page 6: ...g these contributing factors in mind installing equipment as per following instructions should minimize problems 1 Keep the welder input power lines as short as possible and enclose as much of them as possible in metal conduit or equivalent shielding There should be a good electrical contact between this conduit and ground Earth 2 Keep the work and electrode leads as short as possible Tape the lea...

Page 7: ...uipment Do not touch electrically live parts The MMA160S Inverter Arc Welder requires a 240V 50 60Hz supply It requires a 32A supply for It comes with a 3 metre mains cable attached Connect wires according to national coding Brown wire Live Blue wire Neutral Green Yellow Wire Earth Ground Connecting to a mains electrical supply THIS MACHINE IS OF AN INDUSTRIAL SPECIFICATION AND MUST BE FITTED TO A...

Page 8: ... Switch Switches main on and off 2 Earth for chassis If experiencing localized interference when using machine connect workbench to this point using correct graded earth wire not normally used 3 Mains input cable Fit required plug as per your electrical installation ...

Page 9: ... Welding Fig 3 1 Negative power connector Connect the earth lead to by inserting and twisting until tight and the earth clamp to work bench 2 Positive power connector Connect the electrode holder by inserting and twisting until tight ...

Page 10: ... Settings Fig 4 1 LED Display 3 digit LED meter is used to display the actual amperage when welding 2 Main current control This adjusts the main welding current and is shown in L E D Fig 4 1 when welding is in process ...

Page 11: ...n be dangerous Keep your head out of fumes gases produced from welding Use ventilation or exhaust to remove fumes gases from breathing zone and general area WARNING WELDING SPARKS can cause fire or explosion Keep flammable material away from work area Do not weld on containers that have held combustibles WARNING ARC RAYS can burn Wear eye ear and body protection Make sure work area is protected by...

Page 12: ...ut power OFF at the mains switch fuse box before working on this equipment Have a qualified electrician install service this equipment Allow machine to sit for 5 minutes minimum to allow the power capacitors to discharge before working inside this equipment Do not touch electrically live parts 1 Periodically remove the side top panels of machine and clean out machine with a low pressure dry air li...

Page 13: ... of this manual and our website Welding problems No output Power light is not lit Check machine on off switch is in the on position Check Input power to machine Check plug wiring Check mains trip fuses No output Fan runs Power light is lit Check power cable connections and condition of earth clamp assy No output Power light is lit Warning light is lit Welding application may have exceeded recommen...

Page 14: ...rode Contaminated electrodes or material Electrode sticks in weld puddle Welding current is set too low Arc is too short keep electrode further away from work Excessive splatter Too long an arc keep electrode closer to work Poor penetration Travel speed too fast Too much welding current reduce welding amperage Porosity in weld Electrodes are damp Arc too long get electrode closer to work ...

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