Yeswelder ARC-400Q User Manual Download Page 6

ELECTRIC SHOCK CAN CAUSE INJURY OR DEATH! 
Disconnect welder from power supply before assembly, disassembly, or maintenance of the torch, con-
tact tip, and when installing or removing nozzles.

1. Be sure the power cord is unplugged and the power switch is in the “Off” position.
2. Insert the Brass Connector of the Electrode Cable into the Negative ( - ) Brass Receptacle on the Front 
Panel. Note that the Keyed Tab of the Brass Connector fits into the Keyed Slot at the top of the Negative ( - 
) Brass Receptacle 

(FIG C)

. Seat fully and turn 180° clockwise to lock in place.

3.  Insert  the  Brass  Connector  of  the  Ground  Cable  into  the  Positive  (  +  )  Brass  Receptacle  on  the  Front 
Panel. Note that the Keyed Tab of the Brass Connector fits into the Keyed Slot at the top of the Positive ( + ) 
Brass Receptacle 

(FIG D)

. Seat fully and 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.
5. Place a Welding Rod between the jaws of the Electrode or “Stick” Holder.

WELDER SET-UP FOR ARC OR “STICK” WELDING

FIG. C

FIG. D

-5-

The Amperage Adjustment Knob

 (FIG B)

 al-

lows  the  output  amperage  to  be  adjusted 
from 40 to 400 Amps.

Amperage Adjustment Knob

Located at the lower right of the Front Panel 

(FIG  B)

.  When  “Stick”  welding,  the 

GROUND Clamp Cable is plugged in here. 
If  using  the  optional  TIG  Torch,  the 
GROUND Clamp Cable is plugged in here.

Positive (+) Connector

Located  at  the  lower  left  front  of  the  Front 
Panel 

(FIG  B)

.  When  “Stick”  welding,  the 

ELECTRODE  Cable  is  plugged  in  here.  If 
using  the  optional  TIG  Torch  Kit,  the  TIG 
TORCH Cable is plugged in here.

Negative (-) Connector

FIG. B

Amperage Adjustment

ARC Force Adjustment

Thermal Protection LED

Power LED

Negative Connector

Positive Connector

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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