Description Of Front Panel Controls (See Section 6-1) - Miller Big Blue 350 PipePro 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.
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 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 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 60 seconds at a time.
To Stop: turn Engine Control switch to Off
position.
Engine Gauges, Meters, And Lights
.
See Section 6-6 for complete fuel/hour
gauge information.
3 Fuel/Hour Gauge
Use gauge to check fuel level, total engine op-
erating hours, or hours to oil change.
To check fuel level or engine hours when en-
gine is not running, turn Engine Control switch
to Run/Idle position.
4 Engine Indicator Light
Light goes on and engine stops if fuel is low,
engine temperature 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.
5 Engine Coolant Temperature Gauge
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 or
120 VAC.
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 6-5).
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 meters dis-
play Help 25 (see Section 8-10). 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 Dig/Inductance Control
Control adjusts Dig when Stick is selected on
mode switch. When control is set toward mini-
mum, short-circuit amperage at low arc volt-
age is the same as normal welding amperage.
When set toward maximum, short-circuit am-
perage is increased at low arc voltage to as-
sist with arc starts and help prevent the elec-
trode from sticking while welding (see volt-
ampere curves in Section 4-3).
Select setting best suited for application.
Control adjusts inductance when MIG or
FCAW position is selected on the mode
switch. Inductance determines the "wetness"
of the weld puddle. When set toward minim-
um, "wetness" (puddle fluidity) increases.
Control is not functional when one of the TIG
modes is selected.
9 Voltage/Amperage Control
With Process/Contactor switch in any Stick or
TIG setting, use control to adjust amperage.
With Process/Contactor switch in any Wire
(MIG) position, use control to adjust voltage.
Control limits the remote amperage in Stick or
TIG mode, but has no effect in Wire (MIG)
modes.
Weld Meters
.
Weld meters also work in combination to
display troubleshooting help codes (see
Section 8-10).
10 DC Voltmeter
Voltmeter displays preset voltage (MIG weld-
ing) with contactor off, and actual output volt-
age with the contactor on. 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/Contactor switch
to MIG or FCAW position. Turn V/A control
until desired voltage is displayed on Voltme-
ter. When welding is finished, voltmeter dis-
plays weld voltage and then defaults to preset
voltage.
11 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 weld amperage and then defaults to
preset amperage.
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