Control Box Symptoms
P/N 7010-0341 www.topconpositioning.com
9-5
Control Box Symptom 4
“The tow point cylinder doesn't move up or down.”
Probable Cause
Machine electrical switches are not in the proper position,
or hydraulics to the cylinder are not active.
1. Check that all locking pins have been removed and that
all hydraulic blocking valves are in the open and
correct position for automatic control. Refer to the
paver manufacturer's manual.
2. Check that all machine electrical switches - and in
motion circuits are in the correct position for automatic
control. Refer to the paver manufacturers manual. Press
the jog switch up and down on the Control Box to make
sure there is a current going to the valve. Cylinder
should move in the same direction the jog switch is
pressed.
3. Check that the Auto Switch is in “Auto” and that the
Auto Symbol is illuminated on the front panel.
4. Disconnect cables and inspect them for damage or
contamination. Clean all connections with an electrical
contact cleaner.
5. Swap the Control Box with the unit on the opposite
side.
6. If a Control Box is replaced make sure the
configuration and performance settings are correct.
7. If a cable is replaced make sure it is the right part
number. A cable with the incorrect resistor could set the
Control Box to have the wrong configuration.
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