Piper Cherokee Arrow II Pilots Operating Manual page 30

ARROW
I1
ELECTRICAL SYSTEM
The electrical system is very simple and functional. All switches are grouped in a switch
panel above the power quadrant. On the lower right side of the instrument panel is the circuit
breaker panel, with each breaker clearly marked to show what circuit it protects. Also, circuit
provisions are made to handle a complete complement of communication and navigational
equipment.
Standard electrical accessories include alternator, starter, electric fuel pump, stall warning
indicator, ammeter, and annunciator panel*.
The annunciator panel includes alternator and low oil pressure indicator lights. When the
optional gyro system is installed, the annunciator panel also includes a low vacuum indicator
light. The annunciator panel lights are provided only as a warning to the pilot that a system may
not be operating properly, and that he should check and monitor the applicable system gauge to
determine when or if any necessary action is required.
Optional electrical accessories include navigation, anti-collision, landing, instrument and
cabin dome lights. Navigation and radio lights are controlled by a rheostat switch on the left
side of the switch panel. The instrument panel lights are controlled by a rheostat switch on the
right side of the panel.
WARNING
When optional panel lights are installed, rheostat switch must be
off to obtain gear lights full intensity during daytime flying.
When aircraft is operated at night and panel light rheostat switch
is turned on, gear lights will automatically dim.
The anti-collision and landing lights are controlled by rocker switches on the switch panel.
Circuits will handle a full complement of communications and navigational equipment.
I
WARNING
Strobe lights should not
be
operating when flying through overcast
and clouds since reflected light can produce spacial disorientation.
Do not operate strobe lights in close proximity to ground, during
takeoff and landing.
The master switch, also located in the switch panel, is a split rocker switch. One side of the
switch is the battery side ("BAT") and the other is the alternator side ("ALT'). Henceforth,
"master switch," used in this manual, shall mean both "BAT' and "ALT" switches. The "ALT'
switch is provided for an emergency and its function is covered under "Alternator Failure" in
the Emergency section of the handbook.
The primary eiectrical power source is a 14-volt, 60-amp alternator, which is protected by
a voltage regulator and an overvoltage relay. The alternator provides full electrical power output
even at low engine
RPM.
This provides improved radio and electrical equipment operation and
increases battery life by reducing battery load.
*Serial nos. 7535001 and up
AIRPLANE AND SYSTEMS
REVISED: APRIL
13,1979