Lincoln Electric COMMANDER 500 Operator's Manual page 21

B-4
4. ENGINE TEMPERATURE GAUGE (K1639-2
Std., K1639-1 Opt.) AND LIGHT
The gauge displays the engine oil temperature. The
yellow temperature light remains off under normal
operating temperatures. If the light turns on, the engine
protection system will shut down the engine. Check for
restrictions at the engine cooling air inlets and outlets
(consult the engine Operator's Manual). Check for
loose or disconnected leads at the temperature sender
located on the engine. Check engine cooling blower
belt. Also, check to be sure that the welder loads are
within the rating of the welder. The light will remain on
when the engine has been shut down due to an over-
temperature condition.
5. OIL PRESSURE GAUGE (K1639-2 Std.,
K1639-1 Opt.) AND LIGHT
The gauge displays the engine oil pressure when the
engine is running. The yellow oil pressure light remains
off with proper oil pressure. If the light turns on, the
engine protection system will stop the engine. Check
for proper oil level and add oil if necessary. Check for
loose or disconnected leads at the oil pressure sender
located on the engine. The light will go on and stay on
when the RUN-STOP switch is switched to the "Run"
position with engine not running. NOTE: Ammeter light
may also be lit in an oil pressure fault condition.
6. ENGINE ALTERNATOR AMMETER (K1639-
2 Std., K1639-1 Opt.) AND LIGHT
The yellow engine alternator light is off when battery
charging system is functioning normally. If light turns
on, the engine protection system will shut down the
engine. Check the engine cooling blower belt. Also, the
alternator or the voltage regulator may not be operat-
ing correctly. The light may also come on due to a
faulty flashing circuit. The light will remain on when the
engine has been shut down due to a fault in the alter-
nator, regulator, or the cooling blower belt.
7. IDLER SWITCH
Has two positions as follows:
A) In the "High" position
the high idle speed controlled by the governor.
B) In the "Auto" /
ates 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.
OPERATION
, the engine runs at
position, the idler oper-
COMMANDER 500
c. When welding ceases or 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 accelerate
and operate at full speed provided a welding load is
applied within approximately 15 seconds.
• If the triggering device remains pressed but no weld-
ing load is applied within approximately 15 seconds
the engine will return to low idle speed.
• If the triggering device is released or welding ceases
the engine will return to low idle speed after approxi-
mately 15 seconds.
8. HOUR METER
The hour meter displays the total time that the engine
has been running. This meter is a useful indicator for
scheduling preventive maintenance.
B-4