NORAC UC4.5-BC Operator Manual - Manual (Page 43)

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12.2 Sensors
Height or roll sensor appears not to work (displays "NC" or "No Comm"):
• "NC" or "No Comm" refers to no communication. This may be caused by a damaged or
defective CANbus cable. Ensure all cables are connected correctly. The connections
should be tight and free of corrosion.
• Ensure the correct serial numbers are entered for each of the sensors (Section 8.3.1).
• If the cables check out ok, the sensor may be damaged. Try swapping sensors to see if the
problem follows the sensor.
Invalid height sensor measurement (displays "NR" or "NoRdg"):
• "NR" and "NoRdg" refers to no reading. It is normal to see this message occasionally. If
this message occurs all the time, the sensor may be having difficulty obtaining a proper
reading. Ensure the sensor is not out of range. Check the sensor alignment. The sensor
should point almost perpendicular to the ground and there should be no obstructions
between the sensor and the ground.
• The protective foam shield may be contaminated. Inspect and clean the foam shield. If it is
severely worn or dirty replace the foam shield.
• The sensor may have moisture in it. This can be common for sprayers which fold the wing
tips up; therefore pointing the sensors into the air. If rain or moisture collects in the
sensor, remove the protective foam disc and allow the water to drain out. Leaving the
sensor running will help it dry out on its own and start working again.
• The sensor transducer may be damaged. Remove the foam shield and check the sensor
ticking. If the ticking sound cannot be heard or if it is very faint then the transducer may be
damaged and the sensor may need repairing.
During power up the panel shows "1 Absent":
• One of the configured sensors was not found during power up. One of the sensors is
disconnected or not communicating.
• Ensure the correct serial numbers are entered for each of the sensors (Section 8.3.1).