The control unit (cu) - 3, Operator interface - 3 – Franklin Fueling Systems TS-LLD Installation Manual User Manual
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The CU (Control Unit)
The CU monitors data that it receives from the pickup coil. The control unit
automatically turns on the pump when no one is dispensing product and calculates
accurate liquid flow rates to determine if a line leak exists or not.
The dispense signal is also monitored to identify when a customer is about to
dispense product. The CU is tied directly to the existing Pump Relay (Motor
Control) Box that is inside the station. The control unit activates the pump relay,
which turns the pump on and permits product dispensing when no line leak or
errors exist.
When a leak or error is detected, the pump relay is deactivated, which
keeps the pump turned off and prevents product dispensing.
Operator Interface
Two lights, a 2 digit display, and a reset-test touch button are provided for operator
interface. One light turns on when leak tests run, and the other flashes when a line
leak is detected. The two digit display shows operational status codes / day counts
(since the last monthly 0/2 gph line leak test passed), or flashes line leak alarms,
warnings, and error codes when and if they occur.
Brief operating instructions, and a list of codes and display functions are printed on
the control unit faceplate.
See Chapter 3 for complete details.