Table 6-8. Computer Resets But Submersible Pump Does Not Come On; Table 6-9. Computer Resets But Does Not Dispense Product - Wayne Dresser Vista 1 Series Service Manual

Probable Cause
6. Defective Cash/Credit Interface board.
7. If blender, Blend ratios may not agree
with console.
8. Defective computer.

TABLE 6-8. COMPUTER RESETS BUT SUBMERSIBLE PUMP DOES NOT COME ON.

Probable Cause
1. Solenoid drive board not turning on relay.
2. Defective solenoid drive board. Check for
110 VAC output from board.
3. Defective relay.
4. Faulty station wiring.
5. If 110 VAC is present at drive board and
in dispenser j-box, but not at relay panel,
problem is in station wiring.
6. Defective computer assembly.

TABLE 6-9. COMPUTER RESETS BUT DOES NOT DISPENSE PRODUCT.

Probable Cause
1. F1 on Solenoid drive board.
2. Non-Blenders - Solenoid drive board or
Computer Assembly defective. Check for
110 VAC output.
Blenders - Check for 24VDC output
from solenoid drive board.
All dispensers - Also see Table 6-8.
3. Non-Blender - Defective actuator coil.
Blender - Defective proportional valve.
4. Non-Blender - Defective/stuck actuator
or diaphragm.
44
Part No. 920160 Rev A
TABLE 6-7. COMPUTER WILL NOT RESET. (continued)
Corrective Action
Check for signals to Cash/Credit Interface board. Replace
board as necessary. Refer to the appropriate drawing in
APPENDIX B.
Set blend ratios to agree.
Replace computer assembly.
Corrective Action
Check F1 fuse on drive board. Replace as necessary.
Replace board if no output.
Replace relay.
Correct wiring.
Replace computer assembly.
Corrective Action
Replace if it is open.
Non-Blenders - replace solenoid drive board if there is no
110 volt output.
Blenders - if there is no 24 VDC output at J3, but there is 24
VDC input at J4, replace Solenoid Drive Board. If there is no
24 VDC input at J4, check F1 fuse on 24VDC power supply
board. If fuse is open replace it if not soldered in, otherwise,
replace computer assembly.
Non-Blender - Check coils for continuity; if open circuit
replace coil.
Blender - Check coils for continuity; if open circuit replace
defective proportional valve.
Check both valves. Replace or rebuild as necessary.
February 1997