Description Of Front Panel Controls (See Section 6-1) - Miller Big Blue 400 Pro Owner's Manual

6-2. Description Of Front Panel Controls (See Section 6-1)

Engine Starting Controls
1 Preheat Switch
Use switch to energize starting aid for cold
weather starting (see starting instructions
following).
2 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 at no load and weld speed with load
applied.
.
To check engine hours when engine is
not running, turn Engine Control switch to
Run position. To check remaining oil
change hours when engine is not run-
ning, turn Engine Control switch to Run/
Idle position.
.
For best performance when welding
above 300 amperes, place Engine Con-
trol switch in Run position.
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.
To Start:
NOTICE − Do not use ether or other starting
fluids. Using starting fluids voids warranty.
.
If engine does not start, let engine come
to a complete stop before attempting re-
start.
Above 325F (05C): turn Engine Control
switch to Start. Release Engine Control
switch when engine starts.
Below 325F (05C): turn engine control switch
to Run position. Push Preheat switch up for 6
seconds. Turn Engine Control switch to Start.
Release Engine Control switch and Preheat
switch when engine starts.
.
Do not operate Preheat switch for more
than 20 seconds at a time.
To Stop: turn Engine Control switch to Off
position.
Engine Gauges, Meters, And Lights
.
See Section 6-12 for complete fuel, hour,
and engine shutdown information.
3 Fuel Gauge
Use gauge to check fuel level.
4 Engine Service Indicator Lights
Notifies user that engine oil service is due.
Upper LED illuminates when engine oil
change hours are between 49−1. Lower LED
illuminates when oil change hours are 0 or
less.
.
Complete Parts List is available at www.MillerWelds.com
5 Engine Coolant Temperature Gauge
(PipePro Models Only)
Normal temperature is 180 - 203°F (82-95°C).
Engine stops if temperature exceeds 230°F
(110°C).
Weld Controls
6 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 6-8).
With remote control connected, weld output is
determined by a combination of front panel
and remote control
settings.
If no remote control is connected to the Re-
mote receptacle, the front panel Voltage/Am-
perage control adjusts
amperage.
.
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.
7 Process/Contactor Switch
See Section 6-3 for Process/Contactor
switch information.
8 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.
.
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 6-4 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).
9 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
voltage/amperage
displays average weld voltage and then de-
faults to preset voltage.
10 DC Ammeter
Ammeter displays preset amperage (Stick
voltage and
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.
11 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 6-5.
Other Receptacles
12 USB Receptacle
Allows software updates from a USB drive
(see Section 6-10). A summary file of recoded
data from the unit will be saved to a USB drive
that is inserted (see Section 6-11).
Indicator Lights
13 Setup Light
Illuminates when in the Service Menu.
14 In Use Light
Illuminates when connected to an ArcReach
accessory.
15 Arc Control Light
Illuminates when in the Arc Control settings.
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