Table 6-4. Unit Price Not Correctly Displayed; Table 6-5. Unit Will Not Respond To Any Function Switches; Table 6-6. Unit Will Not Respond To An Individual Function Switch; Table 6-7. Computer Will Not Reset - Wayne Dresser Vista 1 Series Service Manual

Probable Cause
1. Loose or defective data cable.
2. Defective computer.

TABLE 6-5. UNIT WILL NOT RESPOND TO ANY FUNCTION SWITCHES.

Probable Cause
1. Loose or defective wiring to switches.
2. Blown fuse on the lighted Cash/Credit
Interface board.
3. Defective switch interface circuitry on
Cash/Credit interface board.
4. Defective computer assembly.
5. Defective display board or cable.

TABLE 6-6. UNIT WILL NOT RESPOND TO AN INDIVIDUAL FUNCTION SWITCH.

Probable Cause
1. Defective Switch.
2. Defective wiring to switch.
Probable Cause
1. Unit prices 0.00.
2. No authorize to dispenser computer.
3. Nozzle switch defective.
4. Defective push to start switch assembly.
5. Bad or loose wire harness.
February 1997

TABLE 6-4. UNIT PRICE NOT CORRECTLY DISPLAYED.

TABLE 6-7. COMPUTER WILL NOT RESET.

Corrective Action
Re-seat or replace data cable.
Replace computer assembly.
Corrective Action
Check and reseat connector J6 on cash/credit interface board.
Check continuity of cable. Replace if defective.
Check F1 on the interface board and replace the board if the
fuse is blown. If no fuse on board, replace board.
Replace the Cash/Credit Interface board.
Replace computer assembly.
Replace display board or cable to J1 on display board.
Corrective Action
Check for +5VDC OFF; zero volts ON, replace switch if volt-
age is constant at either 5 or 0 volts.
Check all wiring to defective function switch.
Corrective Action
See Table 6-3.
Refer to control system operation manual or if stand-alone
dispenser, check Self-Serve/Attend switch.
Refer to Section 4.1. to check operation. Replace if necessary
per Section 7.1.9. or 7.1.10.
Check push to start switch by testing it on another fueling
point. Replace if defective.
Check wire harness and connectors between switch assembly
and Cash/Credit Interface board.
Part No. 920160 Rev A
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