Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List page 30

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
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ENGINE START switch (S24)
The ENGINE START switch, when pressed, connects 12 VDC power to the starter solenoid
coil, which actuates the solenoid switch to connect power to the engine starting motor. The
12 VDC power is supplied directly to the engine ECM and the oil pressure shutdown switch is
bypassed (This bypass is necessary for engine starting because the low oil pressure switch is
CLOSED until the engine is running normally). When the engine is running at idle speed, a
green indicating light, within the ENGINE START push button switch, flashes at a rate of 1
second on, 1 second off.
When pressed a second time, this switch provides a signal to the ECM to adjust the engine
speed to 2000 RPM. The green indicator light glows continuously. At the same time, a
ground signal is provided to the regulator, enabling the generator to build up voltage for 400-
Hz generator output. Pressing the switch once more removes these signals and the engine
reverts to idle speed with a blinking green indicator light.
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OUTPUT switch(s) [Yellow # 1 and/or Orange # 2] (S75, S275)
The load contactor push button switch, when pressed, closes the output contactor and turns
on the respective indicating light within contactor control switches (OUTPUT NO. 1 and or
OUTPUT NO. 2), indicating that power is available at the plug. When the load contactor
opens for any reason, the light is turned OFF.
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ENGINE STOP switch (S76)
When the ENGINE STOP switch is pressed, the red indicator will blink. Then a 3 to 5 minute
delay will occur to permit the turbo and other engine components to cool evenly. After the
delay, power is disconnected from the engine ECM causing the engine to shut down.
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TEST/RESET switch (M6, S77)
The function of the fault code meter is to indicate to the operator, that an abnormal condition
of over voltage, under frequency, etc. occurred, which caused the protective monitoring
system to function. When one of the circuits is activated, it shows the code on the fault code
meter. The fault will remain on for a short period of time or until the TEST/RESET switch is
pressed. Pressing the TEST/RESET switch can also test the fault code meter operation. A
meter test should be performed only when disconnected from a load, as the contactor(s) will
open during the test cycle.
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STARTING CURRENT Switch (S431) [Optional with TR]
Each time the STARTING CURRENT switch is pressed, the BLUE indicator will glow. The
present current limiting amperage setting will be displayed on the fault code meter for a short
time delay, before incrementing, at 100 A increments, up to 2500 A. Once 2500 A has been
reached, the incrementing will start over from the beginning.
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DC OUTPUT Switch (S430) [Optional with TR]
Each time the DC OUTPUT switch is pressed, the BLUE indicator will glow when the circuit is
energized, indicating that power is available at the plug. When the load contactor opens for
any reason, the light is turned OFF.
May 2, 2013 Chapter 1-1
Page 14