Troubleshooting
Topcon Paver System Five Operator’s Manual
9-8
Remember balance point will change if a tracker is
removed.
Control Box Symptom 9
“Grade lights flash high and low and will not stay On-Grade.”
Probable Cause
If problem is only in automatic mode, then hydraulic
Performance Settings are incorrect.
1. Verify paving machines hydraulic flow adjustments
(time for hydraulic cylinder to travel full stroke) are set
to manufactures recommendations.
2. Check that the Valve Offsets are set correctly.
3. Check that the Gain setting is too high. Factory setting
is 25.
If problem is in manual mode, then
1. Verify that temperature bails are clean and securely
attached.
2. Verify temperature bail symbol “T” is displayed on
face of Tracker. If not clean or replace transducer.
3. Check that Trackers are between 14 and 24 inches from
reference.
4. If there are gusty winds, lower Tracker closer to
reference. Approximately 14 to 16 inches.
5. Move Tracker away from gusty heat source, such as
engine fan exhaust.
6. Verify Tracker is not picking up erroneous signals from
undesired reference.
Example: Head of material, end gate, shoulder grade or
material spillage from hopper.
7. If using Stringline, verify line is not bouncing.
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