ARMY TM 9-6115-604-12 NAVY NAVFC P-8-633-12 Table 2-4.  Annunciator Panel A9 Indicators (Continued) Figure 2-4, 3 LOW LUBE OIL PRESSURE in-   Indicates that oil pressure shutdown Dark dicator A9DS2 switch OP2 has sensed an engine oil pressure of 37 to 41 psi (267 to 271 KPa) or lower Figure 2-4, 4 Spare Indicator A9DS12 To allow for the future addition of a new Dark alarm circuit or to be used as a spare if an alarm circuit fails. Figure 2-4, 5 OVERSPEED indicator A9DS1 Indicates that overspeed switch SS3 Dark has sensed an engine speed greater than 2200 rpm. Figure 2-4, 6 EXCESSIVE CRANKING Indi- Indicates that crank cycle timer M7 has Dark cator A9DS13 put the generator set through fourconse- cutive start cycles but the engine failed to start. Figure 2-4, 7 HIGH FUEL LEVEL indicator Indicates that high fuel level switch FL4 Dark A9DS6 has sensed a high fuel condition in the generator set fuel tank Figure 2-4, 8 OVERVOLTAGE indicator Indicates that overvoltage relay K110 Dark A9DS7 has sensed that line-to-line voltage of generator G1 line T1, T2, and/or T3 has risen to 4730 f 100 V ac, or higher, for 3 1 seconds. Figure 2-4, 9 REVERSE POWER Indicator Indicates that reverse power relay K109 Dark A9DS10 has sensed that generator G1 has been motonng (receiving current instead of delivering current) Figure 24, 10 UNDERVOLTAGE indicator Indicates that undervoltage relay Kill Dark A9DS8 has sensed that line-to-line voltage of generator G1 line T1, T2, and/or T3 has fallen below 3540 V ac for more than 1.5 1 seconds Figure 2-4, i1 LOW COOLANT LEVEL indica-    Indicates that coolant level warning Dark tor A9DS1 5 switch S13 has sensed an unacceptably low level of coolant in the radiator. Figure 24, 12 UNDER FREQUENCY indicator    Indicates that under frequency relay Dark A9DS14 K107 (60 hertz operation) or K108 (50 hertz operation) has sensed abnormally low frequency output from generator G1. Figure 2-4, 13 Spare indicator A9DS16 To allow for the future addition of a new Dark alarm circuit or to be used as a spare if an alarm circuit fails Figure 2-4, 14 Spare indicator A9DS17 To allow for the future addition of a new Dark alarm circuit or to be used as a spare If an alarm circuit fails FIGURE AND INDEX NO. CONTROL OR INSTRUMENT FUNCTION NORMAL READING/ SETTING AT RATED LOAD 2-11