Miller Electric Big Blue 401DXQ, Owner'S Manual

Page: 26 / 64

OM-173 413 Page 22
SECTION 5 – OPERATING THE WELDING GENERATOR
5-1. Front Panel Controls
Ref. ST-188 449
This unit has a max OCV control circuit
that resets the Amperage/Voltage Con-
trol to maximum when the arc breaks.
When an arc is struck, weld output con-
trol returns to the front panel or remote
control setting. The Amperage/Voltage
Control adjusts amperage only when
welding and does not adjust open-circuit
voltage.
1 Ampere Range Switch
Do not switch under load.
2 Amperage/Voltage Control
Control adjusts amperage within range se-
lected by Ampere Range switch.
Weld output would be 140 A DC with controls
set as shown (50% of 90 to 190 A).
3 DC Voltmeter (Optional)
4 DC Ammeter (Optional)
5 Remote A/V Switch And Receptacle
(See Section 5-3)
6 Magnetic Shutdown Switch (Optional)
Use switch during start-up to bypass option-
al engine shutdown system. System stops
engine if oil pressure is too low or oil temper-
ature is too high.
7
Engine Control Switch
To Start: turn switch to Start while pressing
Shutdown switch. Release switches when
engine starts.
If the engine does not start, let engine
come to a complete stop before attempt-
ing restart.
In Run position, engine runs at weld/power
speed. In Run/Idle position (optional), engine
runs at idle speed at no load and weld speed
with load applied.
To Stop: turn switch to Off position.
8 Battery Charging Warning Light
Light goes on when battery is not charging.
9 Oil Pressure Warning Light
Light goes on if oil pressure is too low. Light
also goes on if oil temperature is too high (if
unit has automatic shutdown option).
Stop engine and fix trouble if either
light goes on.
10 Engine Hour Meter
11 Oil Temperature Gauge/Switch
(Optional)
12 Oil Pressure Gauge/Switch (Optional)
1
2
11
12
5
3
4
6 7
10
8 9