Unit Price Not Correctly Displayed; Computer Resets But Valves Do Not Open; Computer Resets But Submersible Pump Does Not Come On - Wayne Vista Series Service

Failure Indication
Unit price not correctly
displayed.
Computer resets but
valves do not open.
Computer resets but
submersible pump
does not come on.
50
Part No. 917543 Rev. A
Probable Cause
1. Loose or defective
data cable.
2. Defective unit pice
display board.
1. Check fuse F1 on
Solenoid drive board.
2. Solenoid drive board
defective. Check for
110 VAC output from
solenoid drive board.
3. Defective actuator coil.
4. Defective/stuck
actuator or diaphragm.
5. Defective computer
assembly.
1. Solenoid drive board
not turning on relay.
Check F1 fuse on
drive board.
2. Defective solenoid
drive board. Check
for 110 VAC output
from board.
3. Defective relay.
4. Faulty station wiring.
If 110 VAC is present
at drive board and in
dispenser junction box,
but not at relay panel,
problem is in station
wiring.
5. Defective computer
assembly.
Corrective Action
Re-seat or replace data cable.
Replace unit price display board.
Replace as necessary.
Replace solenoid drive board.
Check coils for continuity; if open
circuit replace defective coil.
Check both valves. Replace or
rebuild as necessary.
Replace.
Replace if necessary.
Replace if no output.
Replace relay.
Correct wiring.
Replace computer.
November 1992