Hobart 60CU24, Operation And Maintenance Manual With Illustrated Parts List, Page: 29 / 234

OM-2098C / Operation and Maintenance Manual
60CU24 / Series 500060C / 400 Hz. Generator Set
November 16, 2007
Revision 8 Chapter 1-1
Page 15
(11) Fault Code meter and “ TEST/RESET” push-button 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 are 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” push-button switch is
pressed. Pressing the “TEST/RESET” push-button 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.
(12) Engine systems fault codes
Fault codes will be shown to warn the operator of abnormal engine operations that must be
corrected. These indicators are over temperature, air cleaner restriction, low oil pressure, and
low fuel indication.
(13) AC Generator output monitors (meters)
Three instruments, a frequency meter, a voltmeter, and an ammeter monitor the generator output.
The frequency meter is an analog type and indicates the frequency of the generator output
alternating current in the range of 360 to 440 Hz (cycles per second). The voltmeter indicates the
generator output voltage in each phase-to-neutral (A-N, B-N and C-N) or phase-to-phase (A-B, B-
C and C-A) as selected by the “
METER SELECT” switch. The voltmeter has a scale of 0 to 300
V. The ammeter has a scale of 0 to 500 A. The amperage value in each of the three phases
may be read on the ammeter by selecting the desired phase with “
METER SELECT” switch. The
ammeter current transformers, located in the output power module circuit, lower the output load
current to a lesser value, of definite ratio, which is sent to the Voltage Regulator PC Board (REG).
The ammeter dial scale is numbered so that the pointer will indicate the true load current value.
(14) Load contactor indicating lights [Yellow # 1 and Orange # 2] (S75, S275)
Indicating lights within the respective contactor control push-button switches ( “OUTPUT NO. 1”
and or “OUTPUT NO. 2” , if applicable) 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.
(15) Front LED Display (A5)
The front LED display signifies to the operator which voltage (A-N, A-B, etc…) and amperage are
shown on the meters, as well as, when
“EF BY-PASS” is present or bypassed. This “EF BY-
PASS” indicator serves to warn the operator that if the plug interlock system was by-passed any
exposed cable may be live.
(16) DC Generator output monitors (meters) [Optional with TR, Reference Appendix A]
Two instruments, a voltmeter and an ammeter, monitor and display the transformer-rectifier’s
output. The voltmeter and ammeter meters are both analog type and indicate the output voltage
from 0 to 50 VDC and the amperage from 0 to 2500 A.
(17) “STARTING CURRENT” Switch (S431) [Optional with TR, Reference Appendix A]
Each time the “STARTING CURRENT” push-button 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.