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TM 10-4320-351-14
stops the engine. When relay K1 deenergizes, a current path is created through FAULT LIGHTS switch S5, LED CR9
and the contacts of relay KI to the 28 VDC line after EMERGENCY STOP switch S5. High pumpage temperature is the
only fault condition which causes an automatic system shut down. The alternator output will decrease to zero when the
engine stops but the PUMPAGE HOT fault light will remain illuminated if the battery is connected at the NATO connector.
The ALTNTR fault light is controlled by circuits in the voltage regulator which use battery voltage as a reference. The fault
light illuminates any time the rectified alternator output is less than the reference battery voltage.
Two RFI networks, one between the battery and voltage regulator VR1 and one between the alternator and voltage
regulator VRI suppress any Radio Frequency Interference (RFI) generated or radiated by AAFARS.
5-6
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