High Country Tek PLD, Powerline / universal single / dual coil PWM Valve Driver - Manual (Page 33)

Part No:- 021-00155 RevD7 PowerLine System Controller User Guide Page | 33
PowerLine User Guide
Troubleshooting:
General Considerations
The ‘PWR OK’ LED must be steadily on, not flashing, for correct unit operation.
This LED will be off if the power supply is too low, and flashing if the power supply is too high. Intermittent low
power supply conditions also cause flashing. Large noise spikes on the power supply can cause the unit to
temporarily shut down due to over voltage.
The INPUT ERROR LED flashes if there is a fault with the COMMAND IN or PULSE IN inputs.
The PWM%A and B LED’s are on when their coil is driven. They range from red ( driving 0%) through green
(driving 100%). The LED’s flash red/off for shorted coils and green/off for open coils. +COIL leads shorted to
power or ground may be interpreted as either a short or open. -COIL leads shorted to power or ground will be
indicated as a short or open on whichever coil is driven first.
NOTE:
The unit WILL NOT drive coils after a short or open until the controllers power is cycled or disabled
then re-enabled by the ENABLE IN signal .
The trouble-shooting mode of Manual PWM% is available to drive the coils without reference to the pulse input.
This allows using a “Virtual Pot” on the computer to control the coil current. Valve selection for coil A or B is
obtained though the use of a “Soft Switch” next to the virtual pot. Manual PWM% applies 0 to 100% of the
power supply to the selected coil output and does not regulate current against power supply variations or coil
resistance changes.
Note: Care should be exercised when driving coils that are rated for lower voltages than the controllers
supply voltage ( i.e. 12V coil with 24V supply ). Over Driving a valve coil may/will damage the coil by
overheating.
The switch inputs have on screen indicators that toggle when that switch function is enabled.
Running graphs allows the viewing of several input and output signals. The PULSE IN voltage display is useful
to verify that the pulse sensor is providing the expected voltage swing. Note that this signal does not show
pulse shapes, but does indicate the range of amplitudes detected by the unit. These graphs can also be used to
aid in tuning the dynamics of the system regulation.
A LOG button allows saving the unit settings and sampling the inputs to the PC for later analysis. multiple logs
can be saved into the same file. Logs should always accompany trouble reports to the factory if possible.