ARMY TM 9-6115-641-10 AIR FORCE TO 35C2-3-456-11 Table 2-2.  Malfunction Indicator Panel Key Control or Indicator Function 1 NO FUEL indicator Lights when fuel level in fuel tank is below preset level. 2 COOLANT HIGH TEMP Lights when engine coolant indicator temperature exceeds 225° ± 5° F (107° ± 3° F). 3 OVERVOLTAGE indicator Lights when voltage in 120 volt generator coil exceeds 153 ± 3 volts. 4 PUSH TEST RESET LAMPS Tests and resets fault indicator lamps. 5 OVER LOAD indicator Lights when current in any phase exceeds 110 percent of rated current. 6 GROUND FAULT CIRCUIT Tests Ground Fault Circuit INTERRUPTER TEST Interrupter. pushbutton 7 Ground Fault Circuit Mechanically trips red indicator, at Interrupter indicator ground fault condition in circuit of convenience receptacle. 8 Ground Fault Circuit Depress to reset Ground Fault Circuit Interrupter PUSH TO Interrupter after test or ground TEST Pushbutton fault has occurred. 9 SHORT CIRCUIT indicator Lights when generator set output in any phase exceeds 425 ± 25 percent of rated current. 10 LOW OIL PRESSURE Lights when engine lubrication indicator systems pressure is less than 15 ± 3 psi (103.4 ± 20.7 kPa) during engine operation. 11 Convenience Receptacle Circuit breaker trips on when load Overload Circuit on convenience receptacle exceeds 10 Breaker (10-amp in-line amps (fuse blows on generator sets, fuse on generator sets, contract number DAAK01-88-D-D080). contract number DAAK01- 88-D-D080) 2-6  Change 2