Yeswelder ARC-400Q User Manual Download Page 3

Improper use of an electric welder can cause electric shock, injury and death! Read all pre-
cautions described in the Welder Manual to reduce the possibility of electric shock.
Disconnect welder from power supply before assembly, disassembly or maintenance of the 
torch, contact tip and when installing or removing nozzles. 
Always  wear  dry,  protective  clothing  and  leather  welding  gloves  and  insulated  footwear. 
Use suitable clothing made from durableflame-resistant material to protect your skin.
If other persons or pets are in the area of welding, use welding screens to protect bystand-
ers from sparks.
Always operate the welder in a clean, dry, well ventilated area. Do not operate the welder in 
humid, wet, rainy or poorly ventilatedareas.
The electrode and work (or ground) circuits are electrically “hot” when the welder is on. Do 
not allow these “hot” parts to come in contact with your bare skin or wet clothing.
Separate yourself from the welding circuit by using insulating mats to prevent contact from 
the work surface.
Be sure that the work piece is properly supported and grounded prior to beginning an elec-
tric welding operation.
Always attach the ground clamp to the piece to be welded and as close to the weld area as 
possible. This will give the least resistance and best weld.

Electric  welding  produces  sparks  which  can  be  discharged  considerable  distances  at  high 
velocity igniting flammable or exploding vapors and materials. 
Do not operate electric arc welder in areas where flammable or explosive vapors are pres-
ent.
Do  not  use  near  combustible  surfaces.  Remove  all  flammable  items  within  35  feet  of  the 
welding area.
Always keep a fire extinguisher nearby while welding.
Use  welding  blankets  to  protect  painted  and  or  flammable  surfaces;  rubber  weather-
stripping, dash boards, engines, etc.
Ensure power supply has properly rated wiring to handle power usage.

READ INSTRUCTIONS

Thoroughly read and understand this manual before using the welder. Save for future refer-
ence.

ELECTRIC SHOCK CAN KILL!

WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION!

The  electromagnetic  field  that  is  generated  during  arc  welding  may  interfere  with  various 
electrical and electronic devices such as cardiac pacemakers. Anyone using such devices 
should consult with their physician prior to performing any electric welding operations.
Exposure  to  electromagnetic  fields  while  welding  may  have  other  health  effects  which  are 
not known.

ELECTROMAGNETIC FIELDS CAN BE A HEALTH HAZARD!

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Summary of Contents for ARC-400Q

Page 1: ...USER S MANUAL Note Please read this user s manual carefully before using this product...

Page 2: ...ut off however the fan will continue run ning to cool the overheated components When a safe temperature has been reached the Welder will auto matically switch the welder output back on To increase the...

Page 3: ...eration Always attach the ground clamp to the piece to be welded and as close to the weld area as possible This will give the least resistance and best weld Electric welding produces sparks which can...

Page 4: ...ing equipment Never touch welded work surface torch tip or nozzle until they have com pletely cooled Grinding and sanding will eject metal chips dust debris and sparks at high velocity To pre vent eye...

Page 5: ...er Switch is set to the ON position FIG B Power Indicator LED Illuminates Amber when the unit has reached the maximum internal component temperature FIG B This oc curs when the Duty Cycle has been exc...

Page 6: ...d turn 180 clockwise to lock in place 4 Attach the Ground Clamp to the workpiece as close to the welding area as possible To ensure good ground clean the grounded area of any rust grease oils or paint...

Page 7: ...ing Rod into the workpiece joint at a 15 angle 3 Lift rod from workpiece when weld bead is completed 4 Turn off Welder power switch 5 Set the Electrode or Stick Holder on a safe non ammable surface 6...

Page 8: ...ow Dif culty Starting Arc Arc Wander Dif culty Holding Arc PROBLEM Clean base metal of any oil debris coatings or moisture If base metal is cold rolled steel make sure to remove any mill scale To redu...

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