Ice Detector Probe Removal; Ice Detector Probe Installation - Piper PA-44-180 SEMINOLE Maintenance Manual

E. If the red light comes on, touch the red wire connector to the black wire connector (wires to instrument
from probe). The red light must go out. If the red light does not go out, the instrument is inoperative
and must be returned to ARP Industries, Inc.
3. The probe and instrument are tested as follows:
A. Turn power on.
B. Rotate sensitivity control up from full counterclockwise position until the red light just goes out (This
should be anywhere from one-quarter to three-quarters turn).
C. Place a piece of paper in the air gap of the probe (between the sensor and the housing lens). The red
light should come on indicating that the system is functioning properly.
REMOVAL OF ICE DETECTOR PROBE.
1. Remove the engine cowl.
2. The probe is mounted in the carburetor or just below the throttle valve control arm. Remove the safety wire
and carefully unscrew the probe from the carburetor. Measure and note how far the probe extends into the
carburetor.
3. Where the wires for the probe come off the engine mount remove the wire insulation sleeves; make note of
the respective wire interconnects; and, disconnect the wires.
4. If the engine is to be operated, install a suitable plug.
INSTALLATION OF ICE DETECTOR PROBE.
1. If a plug has been installed, remove the plug from the carburetor housing. The probe is mounted just below
the throttle valve on the left side of the carburetor.
2. Carefully screw in the probe. When installed the index mark on the probe housing should face - towards the
carburetor air inlet. If necessary use AN96-416L shim washers to position the probe properly.
3. Tighten the probe as much as possible, by hand, and then only, a quarter turn more using a 3/ 8 inch short
handle open end wrench.
4. Connect the appropriate wires and position the sleeves over the connectors. If heat shrink has not been
used, tie with #6 electrical lacing wire.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— CAUTION —
DO NOT BEND THE PROBE COMPONENTS.
2F5
3 0 - 8 2 - 0 4
Page 30-49
Revised: May 15, 1989