Table 6-26. Fault Code 51; Table 6-27. Fault Code 54 - Wayne Dresser Vista 1 Series Service Manual

Probable Cause
Blend ratio error exceeded programmed
limits.
1. Flow restricted on one end grade.
2. Defective solenoid drive board.
3. Faulty wire harness connected to coil.
4. Defective proportional flow control valve.
5. Defective computer.
Probable Cause
(Blender Only) Communication failure
between computer and blender
solenoid drive board.
1. Defective Solenoid Drive Board.
2. Defective Computer assembly.
February 1997

TABLE 6-26. FAULT CODE 51.

Corrective Action
Programming Option 52 should be set at 2% and Option 53
should be set at 1.2 gallons. Reset if necessary.
Observe the low and high meters while dispensing to deter-
mine which grade is restricted. Verify any blend inaccuracy
using electronic totals. Check all valves and flow tubing for
obstructions. Clean strainer and change filter.
Check that the DS1 LED on the drive board stays lit during
the sale and the DS2 LED blinks about every two seconds. If
either of these conditions fails, replace the Solenoid Drive
Board.
Check the wire harness connections to the valve coil wires
and the harness into J3 on the solenoid drive board. Verify the
voltage to the valve coils at 24 VDC when enabled. Replace
wire harness as necessary.
Replace proportional flow control valve.
Replace computer assembly.

TABLE 6-27. FAULT CODE 54.

Corrective Action
Cycle power to dispenser. Replace solenoid drive board if
error continues to occur.
Replace computer assembly.
Part No. 920160 Rev A
51