Fault Codes - Wayne Vista Series Service

3.4. COMPUTER ASSEMBLY, continued
The Duplex Computers are fused to protect them from overvoltages and shorts. There are
three fuses on the computer:
• F1 fuses the input to the 5 VDC regulator on the computer board. If this fuse opens
the dispenser will look like it has been powered down.
• F2 fuses the input to the +12 VDC regulator. This 12 VDC is used only in blending
dispensers to operate the blend motor.
• F3 fuses the main AC input to the computer; all power to the computer, solenoid drive
board, and the displays passes through the F3 fuse. If this fuse opens the dispenser
will look as if it has been powered down.
Note: These are all pico fuses. They physically look very similar to a resistor, are
socketed, and may be replaced in the field.
On the Duplex II Computer there are two option jumpers which must be configured for
proper operation. These are labeled JP2 and JP3; they must be left in their factory in-
stalled positions. (They should be jumpering the two pins which are closest to the edge
of the board for blending applications.) In addition to the jumper settings, there are
programming options which must be set in order for the Duplex II Computer to operate
correctly. (see Programming for the Duplex II Computer—Service, part number 917479,
for specific information.)
3.4.1.

Fault Codes

The fault codes generated by the Duplex II Computer are of four types: Error
codes, Hydraulic codes, Service codes and Disable codes. The definitions of
each of these types are as follows:
•
•
•
•
14
Part No. 917543 Rev. A
Error codes shut down the entire side of the dispenser until the error is
reset by cycling power to the computer or entering Option 99. (See
Programming for the Duplex II Computer—Service, part number 917479,
for specific programming functions.)
Hydraulic codes shut down the nozzle position which was affected by the
error until the error is reset by cycling power to the computer or entering
Option 99.
Service codes are recorded and displayed in Option 01, but do not affect
the operation of the dispenser.
Disable codes are similar to service codes in that they do not affect the
operation of the dispenser; however, they are not recorded or displayed in
Option 01.
November 1992