Sequence Of Operation; Starting Sequence, Master Switch Moved To Run; Starting Sequence, Remote Start; Running Sequence - Kohler 15/30RES Service Manual

4.4 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 the generator set wiring diagram
manual to assist in the troubleshooting procedure.
Refer to the List of Related materials for the wiring
diagram manual part numbers for the RES/RYG and the
RESA/REYG models.
4.4.1 Starting Sequence, Master Switch
Moved to RUN
When the master switch is moved to the RUN position,
there is a delay of about 2 sec. before the controller
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 sec. later. The controller display indicates the crank
cycle 1 code, CC 1.
The controller attempts to start the generator set three
times (three crank cycles, 15 sec. crank and 15 sec. off).
If the generator set does not start in three attempts, the
system shuts down on an overcrank fault.
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 controller's
application code and is not adjustable in the field.
The factory sets the cranking cycle for three cycles of
15 sec. on time and 15 sec. off time. If the cranking
TP-6198 3/15
cycle seems shorter than the factory setting, check the
engine starting battery.
4.4.2

Starting Sequence, Remote Start

When the master switch is set to the AUTO position, the
generator set starts when the remote start switch or
transfer switch engine start contacts close.
The start sequence proceeds as described in
Section 4.4.1, Starting Sequence, Master Switch
Moved to RUN.
4.4.3

Running Sequence

When the engine speed reaches 750 rpm, the crank
relay deenergizes and the crank LED (3) turns off.
When the output voltage on leads 11 and 44 (1-phase
models) or V7, V8, and V9 (3-phase models) reaches
about 30 VAC, the flash relay deenergizes and the flash
LED (2) turns off.
4.4.4 Stopping Sequence, Master
Switch Moved to OFF/RESET
Place the generator master switch in the OFF/RESET
position. The run relay deenergizes and the run LED (1)
turns off. The generator set stops.
4.4.5

Stopping Sequence, Remote Stop

When the remote start contacts open, the run relay
deenergizes and the run LED (1) turns off, but the
controller does not power down. The controller remains
powered and displays the engine runtime hours.
Note: Disconnecting the P7 jumper inside the controller
will allow the controller to power down 48 hours
after generator set shutdown. See Section 4.10
for instructions.
Section 4 Controller 33