TP-6079 3/0010 Section 4 Controller Troubleshooting
4.1.3 Stop
Close the start/stop switch between N and 43 (local or
remote).
The K4 relay energizes (LED4 lights).
The normally closed K4 contacts open, disabling the
fuel pump (FP), choke heater (CHTR), antidiesel
solenoid (ADS), and ignition (IGN).
The normally open K4 contacts close, latching the circuit
to the K4 relay until the generator set comes to a
complete stop.
4.1.4 Low Oil Level (LOL) Safety Switch
When the oil level is low, the LOL shutdown switch
contacts close energizing the K4 relay (LED4 lights).
The generator set shuts down, as described in
Section 4.1.3.
4.2 Controller Circuit Board
The controller circuit board has light emitting diodes
(LEDs) that indicate the presence of relay coil power.
When any of the relays K1--K5 receives power, the
corresponding LED lights.
11
GM10516
Figure 4-2 GM10516 Controller Circuit Board
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