Description Of Front Panel Controls (See Section 6-1) - Miller Big Blue 400 Eco Pro CC 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 fol-
lowing).
2 Engine Control Switch
Use switch to start engine, select engine
speed, and stop engine.
To Start:
NOTICE − Do not use ether.
.
If engine does not start, let engine come
to a complete stop before attempting re-
start.
Above 325 F (05 C): turn Engine Control
switch to Start. Release Engine Control
switch when engine starts.
Below 325 F (05 C): turn engine control switch
to 350−500 Amps position. Push Preheat
switch up for 60 seconds. Turn Engine Con-
trol switch to Start. Release Engine Control
switch and Preheat switch when engine
starts.
To Stop: turn Engine Control switch to Off
position.
Engine Gauges, Meters, And Lights
.
See Section 6-4 for complete fuel/hour
gauge information.
3 Fuel Gauge/Hourmeter
Use gauge to check fuel level or total engine
operating hours, or hours to oil change.
To check fuel level or engine hours when en-
gine is not running, turn Engine Control switch
to 20−350 Amps position.
4 Engine Indicator Light
Light goes on and engine stops if engine tem-
perature exceeds 230° F (110° C) or engine
oil pressure is below 10 psi (69 kPa).
.
Normal engine temperature is 180 - 2035
F (82 - 955 C). Normal oil pressure is 30
- 60 psi (207 - 414 kPa).
NOTICE − Do not run engine until trouble is
fixed.
Weld Controls
5 Remote Control Receptacle
.
This unit is equipped with 24 volts AC
control at RC14 protected by supple-
mentary protector CB8.
.
Remote controls requiring 24 volts AC
connected to the receptacle do not oper-
ate when the Engine Control switch is in
the 350-500 Amp position.
Use receptacle to connect remote controls,
wire feeders, and tools.
When a remote control is connected to the
Remote receptacle, the Auto Sense Remote
feature automatically switches voltage/am-
perage control to the remote control (see Sec-
tion 5-12).
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 RC14 is faulty or is discon-
nected during operation, the optional
meters display Help 25 (see Section
8-10). Clear fault by stopping and restart-
ing the unit or by turning Process switch
to another position.
6 Process Switch
Use switch to select weld process.
!
Weld output terminals are energized
when the engine is running.
.
For welding, it is recommended that the
Engine Control switch be in the 20−350
Amps position. For gouging, place
Engine Control switch in 350−500 Amps
position.
7 CV (Wire Feed) Position
In this position, with Engine Control switch in
20−350 Amps position, the engine runs at
1800 RPM. Auxiliary power is available de-
pending on welding load.
8 CAC-A / Stick Position
For gouging (CAC-A), place Engine Control
switch in 350−500 Amps position. The engine
runs at 3000 RPM and auxiliary power is not
available.
For Stick welding, place Engine Control
switch in 20−350 Amps position. The engine
runs at 1500 RPM at no load and 1800 RPM
while welding. Auxiliary power is available de-
pending on welding load.
9 Scratch Start TIG Position
In this position, with Engine Control switch in
20−350 Amps position, the engine runs at
1800 RPM. Auxiliary power is available de-
pending on welding load.
10 Voltage/Amperage Control
With Process switch in any Stick or TIG set-
ting, use control to adjust amperage. With
Process switch in CV (wire feed) position, use
control to adjust voltage.
Weld Meters (Optional)
.
Weld meters also work in combination to
display troubleshooting help codes (see
Section 8-10).
11 DC Voltmeter
Voltmeter displays preset voltage (FCAW
welding) until an arc is struck, and actual out-
put voltage while welding. Voltmeter displays
voltage at the weld output terminals, but not
necessarily the welding arc due to resistance
of cable and connections.
To set voltage, turn Process switch to CV
position. Turn V/A control until desired volt-
age is displayed on Voltmeter. When welding
is finished, voltmeter displays weld voltage
and then defaults to preset voltage.
12 DC Ammeter
Ammeter displays preset amperage (Stick
and TIG only) when not welding, and actual
output amperage when welding.
To set amperage, turn Process switch to Stick
or TIG position. Turn V/A control until desired
amperage is displayed on Ammeter. When
welding is finished, ammeter displays weld
amperage and then defaults to preset amper-
age.
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