Norac UC4 - Sensor Appears Not to Work. Displaying

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4.2.2
 Sensor appears not to work: Displaying "NC"
 Wrong number of sensors displayed during System Setup
 Displaying "Absent" during System Setup – Sensor Detect
Possible Cause(s) Suggested Solution(s)
a) Serial number (SN)
entered in the control
panel does not match
the connected
sensor’s SN
a) Check SNs entered in the control panel and
verify numbers with each sensor in the
respective boom location. Reenter the
correct SN, if necessary.
b) Poor cable connection
or defective cable(s)
b) Follow a), 4.1.3a-1) and perform Sensor
Swapping described in 4.2.6. If the
symptom continues, the cable(s) may need
repairing.
c) Ensure the sensor cables are not strained or
pinched by boom fold actions
c) Damaged sensor
d) Follow b). If the symptom appears in the
moved boom location, the sensor may need
repairing.
4.2.3
 Invalid sensor measurement: Displaying "NR"
Possible Cause(s) Suggested Solution(s)
a) Sensor is out of range
or reading a target
closer than 7"
a-1) Move the boom(s) until sensor(s) is
between 30 and 60 inches above the
ground.
a-2) Check sensor alignment (Section 6).
NOTE: If the sensor is facing forward/backward too
far, the signal cannot echo back to the sensor.
a-3) Check for obstructions between the sensor
and the ground.
NOTE: Any object between them can deflect the signal
such that it cannot echo back to the sensor.
b) Protective foam shield
is contaminated
b) Inspect and clean the foam shield. Remove
the foam and clean with compressed air.
NOTE: Do not blow out the foam while it is still in the
sensor. Sensor damage will result.