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6-2. Description Of Front Panel Controls (See Section 6-1)
Engine Starting Controls
1
Engine Control Switch
Use switch to start engine, select engine
speed, and stop engine.
In Run position, engine runs at weld/power
speed. In Run/Idle position, engine runs at
idle speed with no generator power or weld
load, and weld/power speed with load ap-
plied.
NOTICE − Diesel engines in Miller equipment
are meant to operate optimally at moderate to
rated load. Using light or no load for extended
periods of time may cause wetstacking or en-
gine damage.
2
Engine Display
See Section 13 for engine display informa-
tion.
Weld Controls
3
Remote Control Receptacle
Use receptacle to connect remote controls,
wire feeders, and tools requiring 24 VAC.
When a remote control is connected to the
Remote receptacle, the Auto Remote Sense
(ARS) feature automatically switches volt-
age/amperage control to the remote control
(see Section 6-9).
With remote control connected, weld output is
determined by a combination of front panel
and remote control voltage/amperage set-
tings.
If no remote control is connected to the Re-
mote receptacle, the front panel Voltage/Am-
perage control adjusts voltage and amper-
age.
.
If a remote device connected to Remote
Receptacle is faulty or is disconnected
during operation, the meters display
CHEK REMT (see Section 8-12). Clear
fault by stopping and restarting the unit or
by turning Process/Contactor switch to
another position.
4
Process/Contactor Switch
See Section 6-4 for Process/Contactor
switch information.
5
Adjust Control/Select Button
Adjust Control
With Process/Contactor Switch in any SMAW
or GTAW process, turn Adjust control to ad-
just preset amperage. With Process/Contac-
tor switch in any FCAW or GMAW process,
turn Adjust control to adjust preset voltage.
Select Button
Push the control to use as Select button.
OM-279640 Page 40
.
Complete Parts List available at www.MillerWelds.com
.
To access Arc Control setting, push and
hold Adjust control for 1 second, then re-
lease. Rotate counterclockwise to set
softer arc control. Rotate clockwise to set
stiffer arc control. Push Adjust control in
and release to save Arc Control setting.
Arc Control setting will time out after 5
seconds of inactivity.
.
To access Service Menu, push and hold
Adjust control for 5 seconds, then re-
lease. See Section 6-5 for Service Menu
operation. Service Menu will time out af-
ter 5 seconds of inactivity.
Weld Meters
.
Weld meters also work in combination to
display troubleshooting error codes (see
Section 8-12).
6
DC Voltmeter
Voltmeter displays preset voltage (GMAW/
FCAW welding) with contactor off, and actual
output voltage with the contactor on. Voltme-
ter displays voltage at the weld output termi-
nals, but not necessarily the welding arc due
to resistance of cable and connections.
To set voltage, turn Process/Contactor switch
to GMAW or FCAW position. Turn V/A control
until desired voltage is displayed on Volt-
meter. When welding is finished, voltmeter
displays average weld voltage and then de-
faults to preset voltage.
7
DC Ammeter
Ammeter displays preset amperage (Stick
and TIG only) when not welding, and actual
output amperage when welding.
To set amperage, turn Process/Contactor
switch to Stick or TIG position. Turn V/A con-
trol until desired amperage is displayed on
Ammeter. When welding is finished, ammeter
displays average weld amperage and then
defaults to preset amperage.
8
Arc Control Meter
Displays current Arc Control setting. Default
value for all processes is 0. Arc Control set-
tings adjust: DIG for SMAW processes, Auto
Stop for GTAW processes, and inductance
for FCAW and GMAW processes. For softer
settings, the LEDs to the left of the star illumi-
nate. For stiffer settings, the LEDs to the right
of the star illuminate. No Arc Control settings
are accessible for GTAW Remote and CAC-A
processes. See Section 6-6.
Other Receptacles
9
USB Receptacle
Allows software updates from a USB drive
(see Section 6-11). A summary file of recoded
data from the unit will be saved to a USB drive
that is inserted (see Section 6-12).
Indicator Lights
10 Setup Light
Illuminates when in the Service Menu.
11 In Use Light
Illuminates when connected to an ArcReach
accessory.
12 Arc Control Light
Illuminates when in the Arc Control settings.
13 Welder Selector Switch (800 Models)
NOTICE − Do not switch under load.
Use switch to select Dual Operator or Single
Operator welding mode.
Place switch in Welder A/Welder B (dual op-
erator) position for CC and CV output from
Welder A (left) and Welder B (right) weld out-
put terminals. Control the weld output from the
terminals on each side using the weld con-
trols on that same side.
Place switch in Welder A (single operator)
position for weld output from Welder A (left)
weld output terminals only.
.
Welder B (right) weld output terminals are
disabled in Single Operator mode. Con-
nect only to Welder A (left) terminals for
Single Operator operation.
Compressor Controls (Air Pak Models)
14 Air Compressor Switch
Use switch to turn air compressor on and off.
Air pressure is present at the compressor air
shutoff valve whenever the compressor is
running. The compressor shuts off when the
engine stops. To use air, the compressor must
be turned on each time the engine is started.
The air compressor will not start if still under
pressure. If air compressor is turned off, wait
for air pressure to bleed off (about 20 sec-
onds) before turning air compressor on again.
15 Air Shutoff Valve
!
Air pressure is present at valve when-
ever Air Pressure display (part of en-
gine display, see Section 13) indicates
air pressure.
Close valve to stop air flow when connecting
or changing tools or air hoses (see Section
5-17).
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