If oil pressure is >0.8 bar, the oil pressure switch (1S2) opens and the OIL PRESSURE indicator lamp (H3) goes
out. If oil pressure does not reach the required level because of a fault, 1S2 does not open and the OIL
PRESSURE lamp (H3) does not go out.
The battery charging alternator (1G3) charges the battery set (2G1/2) via R11, and the BATTERY CHARGING
CONTROL indicator lamp (H2) goes out.
If the battery charging alternator is not charging the battery set due to a fault (no indication on BATTERY
CHARGING meter (P7), the BATTERY CHARGING CONTROL lamp (H2) does not go out.
Auxiliary contactor K2 (error message) deenergizes. The time totalizing meter (P8) receives operating
voltage through N-C contact 81-82, and runs,
GLOWPLUG/START rotary switch (S2) to 0:
GLOWPLUG ON lamp (H1) goes out.
Auxiliary contactor K28 deenergizes.
Starter shuts down, and cannot be restarted while engine is running (K2 provides starter lockout).
Speed governor assembly N1 and digital isochronous load sharing module N4 are provided with +24
V through N-C contacts 51-52 and 61-62 of K2 and K5.
N1 regulates engine speed, and therefore generator frequency, to the setpoint set with the FREQUENCY
ADJUST potentiometer (R4).
The coil of K3 is connected to +24 V through N-C contact 71-72 of K2.
lime relay K3 energizes after a time delay, and switches +24 V through N-O contact 15-18 to the coil of K6.
Auxiliary contactor K6 energizes and switches +24 V through N-O contacts 1-2 and 3-4 to the coil of K25 and
K26, the interlock chain, voltage regulator N2, and safety device N3.
Time relay K26 energizes after a time delay and switches +24 V through N-O contact 15-18 to the coil of K25,
thus enabling shutdown due to faults:
Reverse power (K27); and
Generator temperature too high (K9).
N2 regulates generator voltages to the setpoint set with the VOLTAGE ADJUST potentiometer (R3).
During the energizing delay of time relay K13, safety device N3 checks the generator for:
Thermistor relay F12 and auxiliary contactor K9 respond if the stator winding temperature reaches or
exceeds approximately 302 °F (150 °C).