Aircraft Systems • 5
electrical load should be reduced as much as possible. Check the alternator circuit
breakers for a popped circuit.
The next step is to attempt to reset the overvoltage relay. This is accomplished by
moving the ALT switch to OFF for one second and then to ON. If the trouble was
caused by a momentary overvoltage condition (30.5 volts and up) this procedure
should return the ammeter to a normal reading.
Note: Low Bus Voltage Annunciator will be illuminated.
If the ammeter continues to indicate "0" output, or if the alternator will not remain
reset, turn o the ALT switch, maintain minimum electrical load, and land as soon
as practical. Anticipate complete electrical failure. Duration of battery power will be
dependent on electrical load and battery condition prior to failure."
The battery is used as a source of emergency electrical power and for engine
starts. High drain items include the lights, vent fan, heater, radios, and PFD/MFD.
If an electrical problem arises, always check circuit breakers. If a circuit breaker is
popped, reset only one time.
CAUTION: Do not reset popped circuit breakers if smoke can be
smelled.
Other electrical components include the standby attitude indicator, the starter,
the electric fuel pump, electric engine primer, the stall warning horn, the
ammeter, and the annunciator panel.
Garmin G500
The Archer is equipped with the Garmin G500 electronic ight deck. The G500
powers on with the battery master switch.
PRIMARY FLIGHT
DISPLAY (PFD)
MULTI-FUNCTION
DISPLAY (MFD)
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