Section 6 Controller Troubleshooting; Sequence Of Operation; Start; Run - Kohler 5E Service Manual

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Operation (48 pages)

Table Of Contents

Table of Contents

6.1 Sequence of Operation

This section describes the controller sequence of

operation during the generator start, run, stop, and fault

shutdown modes and describes the relay testing

procedures. Use this section as a starting point for

controller fault identification. Use the LEDs on the

controller circuit board to assist in the troubleshooting

process.

An illuminated LED indicates that the

respective relay is receiving power; the LED does not

indicate whether that relay is energized or working

properly.

6.1.1

Start

Close the start/stop switch between N and 47 (local or

remote).

The K2 relay energizes and LED2 is illuminated. The

normally-open K2 contacts close to energize the K3

relay (LED3 lights), fuel pump (FP), choke heater

(CHTR), antidiesel solenoid (ADS), ignition (IGN), and

hourmeter (HR).

Flashing of the main field occurs when the K2 contacts

close.

The normally-open K3 contacts close to energize the

K20 relay.

The normally-open K20 contacts close,

energizing the starter relay and the starter motor.

Note: The normally-closed LOP contacts open when

the engine builds oil pressure. This may take a

few seconds after engine cranking is initiated.

6.1.2

Run

The bridged rectifier (BR1) receives AC voltage

(12--15 volts) through the B1 and B2 windings of the

stator.

The K1 relay energizes (LED1 lights).

The normally-open K1 contacts close to maintain

voltage to the K2 relay, allowing the function of the fuel

pump (FP), choke heater (CHTR), antidiesel solenoid

(ADS), ignition (IGN), hourmeter (HR), and the remote

panel gauges.

The normally-closed K1 contacts open, ending the

flashing by preventing battery voltage to the main field

(+) and (--).

TP-5986 4/03