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PIPER CHEROKEE WARRIOR SERV I C E M A N U A L
f . Engage (push in) BAT T E RY FEEDER circuit breaker and place BATT MAST switch in ON
p o s ition.
g. Check that lights associated with replaced potentiometer control operate properly.
h. Place BATT MAST switch in OFF position.
11-125. ANNUNCIATOR PANEL.
11-126. ANNUNCIATOR PANEL DESCRIPTION (WARRIOR/WARRIOR II).
The annunciator panel is a small cluster of lights which warn of malfunctions in circuits or systems. A
malfunction is identified by a warning light. There are three amber warning lights and a push-button test
switch. Power is supplied from the bus bar through a 5 amp fuse behind switch panel.
The VAC warning light is controlled by a vacuum sensor switch at the firewall and is attached to the vacu-
um regulator. The sensor switch will activate whenever differential pressure is below 3.5 in. hg.
The OIL warning light is controlled by an oil pressure sensor switch, incorporated in the oil line to the oil
pressure gauge, and is located at the firewall. The sensor switch will activate whenever the oil pressure is
below 35 psi.
The ALT warning light is illuminated by current flowing from the bus bar to the alternator circuit. T h i s
condition exists when the alternator is not operating properly and its output is zero. During normal opera-
tion the alternator warning circuit is also supplied with power from the top diode terminal. This current f l o w s
through a 5 amp fuse (near the diode heat sink) to the resistor and diode, creating a no-flow condition, which
does not allow warning light illumination.
The test button is used to check operation of lights when engine is running. Lights will work when engine
is not running if master switch is turned on.
11-127. ANNUNCIATOR PANEL DESCRIPTION (WARRIOR III).
While provisions are made for nine lights, the lighted cluster incorporates only five lights . Refer to
Table XI-XII for the description and function of each annunciator light.
TABLE XI-XII. ANNUNCIATOR LIGHTS DESCRIPTION AND FUNCTION (WARRIOR III)
Nomenclature
LOW BUS VOLTAGE
PITOT HEAT OFF/INOP
STARTER ENGAGE
VACUUM INOP
A LT E R N ATOR INOP
OIL PRESSURE
CARB ICE
BLACK LINE
Revised: February 28, 1995
Color
RED
Illuminates when the electrical system d r o p s
from bus voltage (28 Vdc) to battery volta g e
(24.5 Vdc).
AMBER
Illuminates when the pitot heat fails or is
selected OFF.
RED
Illuminates when engine starter is engaged.
AMBER
Illuminates when the vacuum sensor s w i t c h
on the firewall is a c t ivated. The v a c u u m
sensor switch is attached to a r e g u l a t o r, s e t
to close when pressure falls below 3.5 inches
of Hg.
R E D
Illuminates when the alternator fails or is
selected OFF.
A M B E R
Illuminates when the in-line oil pressure
sensor switch, located at the firewall, sense s
oil pressure has fallen below 35 psi.
R E D
Illuminates when ice forms in carburetor
throat. Adusted by sensitivity control knob
on carburetor heat panel
G R E E N
B l a n k .
2G14
Island Enterprises
Cause Of Illumination
ELECTRICAL SYSTEM
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