Figure A-9. Fault Code 10 Or 21 - Wayne Dresser Vista 1 Series Service Manual

82
Part No. 920160 Rev A
10 or 21
fault code.
Reverse pulse error.
Error
occurs while
dispensing blend
YES
at proportional
blender?
NO
While
dispensing
feedstock at
YES
proportional
blender?
NO
1
Is there
enough tension
NO
on the pulser
disc?
YES
Is the
pulser shaft
NO
aligned with the
drive gear?
YES
Ensure that all air
is purged from the
underground
system.
2
Replace the
computer.
END

FIGURE A-9. FAULT CODE 10 OR 21.

Ensure that both
submersible pumps
are operating at equal
bypass pressures.
Correct as necessary.
Check for leaking
flow control valves
on the opposite
side feedstock from
that being dispensed.
Correct as necessary.
Install wave washer
if one is not present.
Align the pulser shaft
with the meter drive
gear.
Is the
problem
NO
corrected?
YES
Is the
YES
problem
corrected?
NO
1
Is the
problem YES
corrected?
NO
1
Is the
problem NO 2
corrected?
YES
February 1997