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7.3 Sequence of Operation
The following sections describe the controller sequence
of operation during generator start, run, stop, and fault
shutdown modes.
Use this as a starting point for
controller and relay board fault identification. Refer to
the wiring diagrams in Section 10 to assist in the
troubleshooting procedure.
7.3.1
Starting Sequence, Master Switch
Moved to RUN
When the master switch is moved to the RUN position,
there is a delay of about 1 second before the ADC
attempts to start the engine. The run relay energizes
and the run LED (1) turns on. The crank and flash relays
energize and the corresponding LEDs (2 and 3) turn on
0.5 seconds later. The ADC display indicates the crank
cycle 1 code, CC 1.
The ADC attempts to start the generator set three times
(three crank cycles, 15 seconds crank and 15 seconds
off). If the generator set does not start in three attempts,
the system shuts down on an overcrank fault.
TP-6359 7/08
When the engine comes up to speed, the low oil
pressure switch contacts open.
Note: The controller circuit board prevents fault
shutdowns during startup until the crank
disconnect relay energizes.
The cyclic cranking cycle is programmed into the ADC's
application code and is not adjustable in the field.
The factory sets the cranking cycle for three cycles of
15 seconds on time and 15 seconds off time. If the
cranking cycle seems shorter than the factory setting,
check the engine starting battery.
7.3.2
Starting Sequence, Remote Start
When the master switch is moved to the AUTO position,
the controller may remain OFF until the remote start
switch or transfer switch engine start contacts close the
first time, if the power jumper is removed.
The start sequence proceeds as described in
Section 7.3.1, Starting Sequence, Master Switch
Moved to RUN.
Section 7 Controller
37
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