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b-5
23. GROUND STUD:
Provides a connection point for connecting the
machine case to earth ground. Refer to
"MACHINE GROUNDING" in the Installation
chapter for proper machine grounding informa-
tion.
24. RCD:
"Residual Current Device" provides protection
from active to ground contact.
RCD will not protect against electrical shock
resulting from contact with active and neutral
wires.
25. VRD INDICATOR LIGHTS:
Indicates OCV voltage across the output termi-
nals. Also indicates operation of VRD in CC
mode. A Green light indicates OCV below 30V
and a red light indicates OCV above 30V.
During welding both lights will flash, depending on
the type of Consumable being used.
AIR COMPRESSOR CONTROLS (26
THRU 29)
26. COMPRESSOR HOUR METER
The compressor hour meter displays the total
time that the compressor has been running (com-
pressor switch must be on).
27. COMPRESSOR ON/OFF SWITCH
Turns compressor on and off activating or deacti-
vating the electromagnetic compressor clutch.
28. COMPRESSOR PROTECTION LIGHT
The yellow compressor protection light remains
off with proper compressor oil temperatures. If the
lights turn on, the compressor protection system
will deactivate the compressor clutch and put the
system in standby mode until the temperature
reaches allowable limits. Check for proper com-
pressor oil level.
29. AIR DISCHARGE VALVE
Controls flow of compressed air. A 3/4" NPT
(National Pipe Thread) fitting is provided.
OPERATION
bATTERY JUMP START TERMINAL
(30-31)
30. POSITIVE bATTERY JUMP START
TERMINAL.
31. NEGATIVE bATTERY JUMP START
TERMINAL.
12V battery jump start feature is standard.
Covered output studs for convenient access, and
protection against accidental impact. can be used
to jump-start a utility truck with up to 800 cold
cranking amps. Can also be used to jump-start the
AIR VANTAGE® 500 (AU) Cummins.
32. bATTERY DISCONNECT SWITCH
Battery disconnect switch provides lockout/tagout
capability. Switch is conveniently located on the
front bottom of the machine.
33. AIR CLEANER AND SERVICE INDICATOR
Air cleaner service indicator provides a Go/No-Go
visual indication of useful filter service life. Also
located inside the engine compartment. (SEE FIG-
URE B.2)
AIR VANTAGE® 500 (AU)
FIGURE b.2
33
b-5
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