Description Of Front Panel Controls (See Section 6-1) - Miller Big Blue Air Pak 600 Owner's Manual

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.
The air compressor load does not affect en-
gine speed. Run engine at weld/power speed
for maximum air compressor output.
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. If unburned fuel and oil collect
in exhaust pipe, see Section 14.
To Start: see Section 6-3 for engine starting
sequence.
To Stop: turn Engine Control switch to Off
position.
2 Engine Display
See Section 13 for engine display infor-
mation.
Weld Meters
.
Weld meters also work in combination to
display troubleshooting help codes (see
Section 8-12).
3 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
.
Complete Parts List available at www.MillerWelds.com
displays weld amperage and then defaults to
preset amperage.
4 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 Volt-
meter. When welding is finished, voltmeter
displays weld voltage and then defaults to
preset voltage.
Weld Controls
5 Arc Control
See Section 6-5 for Arc Control information.
6 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 or FCAW) position, use control to adjust
voltage. Control limits the remote amperage
in Stick or TIG mode, but has no effect in Wire
modes.
7 Process/Contactor Switch
See Section 6-4 for Process/Contactor
switch information.
8 24 Volts AC Overload Protection
See Section 8-11 for overload protection in-
formation.
9 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 Sense Remote
feature automatically switches voltage/am-
perage control to the remote control (see Sec-
tion 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 Help
25 (see Section 8-12). Clear fault by stop-
ping and restarting the unit or by turning
Process/Contactor switch to another
position.
Compressor Controls
10 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.
11 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
5-11).
OM-275624 Page 33