Part No. 920525 Rev A - Wayne 3/VISTA series Service Manual

• The computer performs a self test and flashes eights, blanks, then resets to zeros, on the
main sale display.
• After the dispenser resets, the proportional flow control valve (or valves if a blender model)
is energized with just enough current to barely open the valve and allow a slow flow.
After a small amount of fuel has been dispensed, the valve(s) is energized with enough
current to be in the fully open position and allow fast flow. During the sale, the valve(s) will
be continuously controlled with the proper amount of current to limit fuel flow rate to a
maximum of 10 GPM
• In preset sales, the current received by the proportional flow control valve(s) is
reduced to the barely open position just prior to the final shut-off amount. The valve(s) is
then de-energized when the final amount is reached.
• When the nozzle is returned to the nozzle boot, the nozzle switch goes back to the constant
+5 VDC and the sale is complete.
2.3. SETTING UNIT PRICES
The procedure below is used to set the dispenser unit prices when operating in stand alone mode
or when communication with the POS system is disabled. When enabled, the POS system will
not allow price setting at the dispenser.
The pump computer recognizes code stored in memory that defines a dispenser model and
assigns logical nozzle numbers to the hose positions as shown in (Table 2-1). To set unit prices
on side 1 and side 2, functions F03 and F04 are accessed using the remote control interface.
Credit prices on side 1 are set using sub-functions F03.0N while cash prices are set using sub-
functions F03.1N, where N is the logical nozzle number. Active values of N are given in Table 2-
1. For side 2, the corresponding sub-functions are F04.0N and F04.1N, respectively.
To set the unit price, the correct sub-function is accessed, the unit price is changed to its new
value and the data is saved. To access the desired sub-function, perform the following steps using
the remote control. Bold type denotes remote control function; italicized type denotes dispenser
response.
Accessing the Unit Price Sub-function for Side 1
1. Press ENTER
PASS 1 (enter password)
2. Press ENTER
PASS 2 (enter password)
3. Press ENTER. The unit price display will show F— (indicating it needs a function number
to proceed)
4. Press 03 to access F03
5. Press ENTER. The unit price display will show F03 (indicating the function has been
accessed)
6. Press ENTER to access the sub-functions of F03. The unit price display will show 3.01.
* The maximum allowable flow rate in the United States is 10 gallons per minute.
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Part No. 920525 Rev A

*
, and if a blender model, provide the correct blend ratio.
June 2001