Section 5 − Operation; Front Panel Controls; Process Selection - Miller Electric UNITOR UWI 150 Auto-Line Owner's Manual

5-1. Front Panel Controls

1 Ready Light
Light comes on approximately two seconds af-
ter power switch is placed in On (I) position if
Lift-Arc or Stick has been selected. The light in-
dicates that the unit is energized and ready for
welding. A flashing light indicates unit is not
ready, or that there is a functional error.
.
The fan motor is thermostatically
controlled.
2 High Temperature Light
Light comes on if unit overheats. Once unit has
cooled down, welding can resume. If this light
flashes, take unit to an Authorized Service
Agent.
3 Amperage Adjustment Control
This control adjusts welding amperage.

5-2. Process Selection

2
1
Press
SECTION 5 − OPERATION
Ref. 803 375 / 219 846
4 Process Select Switch
See Section 5-2.
5 Positive Weld Output Receptacle
For Stick welding, connect electrode cable to
this receptacle. For TIG welding, connect work
cable to this receptacle.
6 Negative Weld Output Receptacle
For Stick welding, connect work cable to this
receptacle. For TIG welding, connect torch
cable to this receptacle.
=Light Off =Light On
4
3
Press
4
8
5
7
7 Remote Receptacle
For Lift-Arc TIG, output may be adjusted from
min to max of the front panel setting with a re-
mote control. Also enables output in Lift-Arc re-
mote process (see Section 4-7).
8 Power Switch
Place switch in On (I) or Off (0) position as
needed.
Press
1 Process Selector Switch Pad
Use control to select required welding
process. Press switch pad until LED
for desired process is illuminated.
2 Lift Arct Start
When selected, a TIG arc starting
method in which the electrode must
come in contact with the workpiece to
initiate an arc (see Section 5-3).
3 Stick (SMAW)
When selected, Adaptive Hot Start
and DIG circuitry are energized.
4 Lift Arct Start (Remote)
A TIG starting method in which the
electrode must come in contact with
the work and a closure from pin 1 to pin
2 on the remote receptacle (see Sec-
tion 4-7) is required to initiate an arc.
OM-220 340 Page 17
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