Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List page 24

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
The diesel engine air cleaner is so constructed that air enters through its cylindrical body, and
then is filtered before being passed into the engine turbo-charger assembly. An air cleaner
service indicator device is mounted on the air cleaner assembly to monitor the airflow into the air
cleaner. As the air cleaner becomes filled with dust, dirt, and carbon, the intake system airflow
becomes increasingly restricted. This restriction causes a diaphragm inside the indicator to move
toward an electrical contact. When the maximum allowable restriction level is reached, the circuit
closes and the air cleaner indicator fault appears on the control panel fault display to warn the
operator that the air cleaner must be changed. The electrical indicator automatically resets when
the restriction level drops sufficiently.
d) Engine faults
The following is a table listing faults, which may occasionally occur. Column two of the table explains
what happens in the engine's circuitry when the fault occurs, and column three tells how to return the
generator set to service once the problem is solved. Refer to Chapter 2 for more details on all other
faults.
Engine Fault
Condition
Over temperature or
low oil pressure
Low fuel warning and
shutdown
Clogged air cleaner
or other restriction in
the combustion air
inlet.
e) Generator
exciter AC output to DC for excitation of the generator revolving fields. The exciter DC output to the
generator fields, and consequently the generator output, is controlled by the voltage regulator PC
board (REG). A centrifugal, radial-blade fan draws cooling air over all internal windings. Air enters at
the exciter end and is discharged at the drive end. The complete generator assembly is bolted to the
engine's flywheel and housing.
May 2, 2013
ENGINE FAULTS
What Occurs
Shuts down the engine, and
will be indicated will
appropriate fault code.
Turns on the low fuel
indication on the fault code
meter. The GPU is
programmed at the factory
1
to warn at / tank and to
4
1
shutdown at / tank.
8
Turns on the air cleaner
restriction indicating fault
code.
The 400 Hz generator is a brushless, dual bearing, revolving field, three-phase,
alternating current type. The front end of the rotor shaft extends forward beyond
the front bearing and is coupled to the engine flywheel by a flexible coupling
assembly. The rear end of the rotor shaft extends rearward beyond the rear
bearing and into the exciter stator housing. The exciter rotor is mounted on this
shaft extension with a key and is secured by a washer and 1/2-13 thread cap
screw. A rectifier has six diodes mounted on the exciter rotor and converts
How To Reset
a) Press the engine stop button to reset the
fault code and reset the protective system.
b) Or use E-STOP button for immediate reset.
a) The low fuel fault indicating
function must be reset by
pressing the engine stop button
Fuel must be added prior to attempting another
engine start.
b) Or use E-STOP button for immediate reset.
a) Press the engine stop button. The
restriction must be removed prior to attempting
another engine start.
b) Or use E-STOP button for immediate reset.
Chapter 1-1
Page 8