Lincoln Electric RANGER 405D Operating Manual page 17

7. Switch: PREHEAT
Toggle to preheat position to energize the glow plugs, then toggle
through to the start position and hold to crank the engine; release
as the engine starts. To stop the engine, toggle to the stop
position.
Note: When starting the engine the engine stop button must be
released. If the engine stop button is used to stop the engine, the
key switch must also be toggled to the stop position otherwise the
battery may be drained.
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:
• 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 12 seconds.
• If the triggering device remains pressed but no welding load
is applied within approximately 12 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 approximately 12
seconds.
10. 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.
IMA 608D
STOP RUN START
Ranger 405D
11. Engine Protection
The engine protection lights remain off with proper oil pressure
and under normal operating temperatures. If a light turns on the
engine protection system will stop the engine. the illuminated light
will indicate the reason for the engine shutdown. Low oil pressure,
high coolant temperature, high electrical temperature or electrical
fault.
Welder Thermal Protection Light
The thermal protection light will be lit if either of the two
electrical protection thermostats have opened. This circuit is
combined with the engine protection circuit so that if over
temperature is sensed the engine is shut down. The engine
will restart & run for only approx 10 seconds if the high temp
light is still illuminated.
Welding Output Failure
Incorrect voltages and / or welding output malfunction will cause
the Welding Output Failure light to be illuminated. The engine will
not restart and run if the "Welding Output Failure" light is still
illuminated.
Oil Pressure Light
This circuit is combined with the engine protection circuit so that
if low oil pressure is sensed the engine will shut down. The engine
will restart and run for approx 10 seconds if the low oil light is
illuminated.
12. Arc Force Control
(effective only in C.C. mode)
Increase/Decrease short circuit current
The arc force dial should be set at approx mid-range for most
welding. Adjustments up or down can then be made
depending on the electrode, procedures and operator
preference. Higher settings will provide more short circuit
current giving a more forceful arc. Excessive spatter may
result if the control setting is too high. For most TIG welding
applications adjust this control to minimum for best operating
characteristics.
13. Weld Output Terminals + and -
These Twistmate plugs and sockets provide welding connection
points for the electrode and work cables. For positive polarity
welding the electrode cable connects to the "+" terminal and the
work cable connects to this "-" terminal. For negative polarity
welding the work cable connects to the "+" terminal and the
electrode cable connects to this "-" terminal.
14. Earth Connection
An earthing stud is provided on the control panel. Refer to
Installation Instructions Section this manual. "Machine Earthing"
and local regulations eg. Australian Standard AS3000.
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