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OPERATION
B4.5 B4.5
VANTAGE® 500
6. OIL PRESSURE GAUGE
The gauge displays the engine oil pressure when the
engine is running.
7. ENGINE PROTECTION
The yellow engine protection light remains off with
proper oil pressure and under normal operating tem-
peratures. If the light turns on, the engine protection
system will stop the engine. Check for proper oil and
coolant levels and add oil and/or coolant if neces-
sary. Check for loose or disconnected leads at the oil
pressure sender located on the engine. The light will
remain on when the engine has been shut down due
to low oil pressure or over-temperature condition.
8. BATTERY CHARGING LIGHT
The yellow engine alternator light is off when battery
charging system is functioning normally. If light turns
on the alternator or the voltage regulator may not be
operating correctly. The light will remain on when the
engine is stopped and the run/stop switch is in the
run position.
9. IDLER SWITCH
Has two positions as follows:
A) In the “High” position, the engine runs at the
high idle speed controlled by the governor.
B) In the “Auto” / position, the idler
operates as follows:
a. When switched from “High” to “Auto” or after
starting the engine, the engine will operate at
full speed for approximately 12 seconds and
then go to low idle speed.
b. When the electrode touches the work or power
is drawn for lights or tools (approximately 100
Watts minimum) the engine accelerates and
operates at full speed.
c. When welding ceases and the AC power load is
turned off, a fixed time delay of approximately
12 seconds starts.
d. If the welding or AC power load is not restarted
before the end of the time delay, the idler
reduces the engine speed to low idle speed.
e. The engine will automatically return to high idle
speed when the welding load or A.C. power
load is reapplied.
Idler Operational exceptions
When the WELDING TERMINALS switch is in the
“Remotely Controlled” position the idler will operate as
follows:
a. When the triggering device (Amptrol, Arc Start
Switch, etc.) is pressed the engine will acceler-
ate and operate at full speed provided a weld-
ing load is applied within approximately 12 sec-
onds.
• If the triggering device remains pressed but no
welding load is applied within approximately 12
seconds the engine may return to low idle
speed.
• If the triggering device is released or welding
ceases the engine will return to low idle speed
after approximately 12 seconds.
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