High Country Tek Plug Top Driver Series - Manual (Page 4)

Electronic Controller Solutions for the Fluid Power Industry
Troubleshooting Guide:
There is Not enough pressure or flow at maximum command input:
1) Increase the ‘I Max’ setting until the required levels are achieved.
T
here is very little control at the lower end of the command signal:
1) Increase the ‘I Min’ setting until the required levels are achieved.
Cannot achieve full flow or pressure at full command and full ‘I Max’ adjustment:
1) Check supply voltage is at nominal levels and is stable ( not collapsing ) under full load conditions.
2) Ensure that the coil fitted to the valve is correct for the supply voltage( I.e. 12V coil for 12V supply ).
3) Check that the command signal used is achieving expected maximum level at the PTD input wire.
4) If using a potentiometer or joystick, ensure that the value is 10K to avoid loading the PTD +Vref.
NOTE: Remember, if the supply voltage is reduced, the output current to the coil will also be reduced resulting in the valve not
being able to achieve full displacement.
The unit does not respond to an external command voltage:
1) Ensure that the external command source’s GND (0V) is connected to the PTD’s GND (0V) wire.
2) Check continuity of command cables between source and driver unit.
The output from the driver goes between zero and full on only with no proportionality:
1) Ensure that there is a coil connected to the PTD output.
2) Check that the coil is not open circuit.
3) Check the command voltage is proportional.
The unit is completely dead with the led not coming on at all:
1) Check that the supply voltage is present & correct
2) Check the supply input fuse for continuity and correct fitting.
3) Check that there is a command connected and correct to the PTD
4) The unit is damaged and needs to be replaced.
The unit is very slow to respond to command input signals:
1) Re-adjust the PTD’s ‘Ramp Generator’ settings to get required response.
The valve appears to have large hysteresis and does not respond correctly:
1) Adjust the driver units ‘Dither Frequency’ settings to get required response.
For more information on application of these plug top drivers, visit our
website or contact our customer service department
High Country Tek, Inc.
208 Gold Flat Court
Nevada City, CA, 95959
Tel: (1) 530 265 3236
Fax:(1) 530 265 3275
www.hctcontrols.com
PTD-Guide-B.pub/GG/011 Copyright © High Country Tek, Inc. - 2011
A SUN Hydraulics Company