b. To test the instrument:
1. Disconnect the probe at the knife connectors.
2. Apply +12 volts DC to the red wire with a fuseholder. Apply -12 volts DC to the black ground wire.
3. The red carburetor ice light should come on, if it does not, the instrument is inoperative and must be
returned to the manufacturer. (See Note)
4. If the red light comes on, touch the red wire connector to the black wire connector. The red light must
c. To test the probe and instrument's function:
1. Turn power on.
2. Turn sensitivity control up from its full counterclockwise position until red light just goes out. This
should be between 1/4 and 3/4 turn.
3. Place a piece of paper in the air gap of the probe (between the sensor and housing lens). The red light
should come on.
—NOTE—
The only FAA approved repair shop for this instrument is ARP
Industries, Inc.; 36 Bay Drive E.; Huntington, New York 11743; Tel. 516-
427-1585.
THIS SPACE INTENTIONALLY LEFT BLANK
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
POWER PLANT
1K14