Figure A-5. Fault Code 05 Or 20 - Wayne Dresser Vista 1 Series Service Manual

05 or 20 fault code.
Normally Pulse jitter,
Check pulser disc for
cracks or blocked
the photocoupler?
connections from the
pulsers thru the ISB
assy to the computer
& solenoid drive board.
R e p a i r / R e p a c e
w i r i n g o r r e p l a c e
78
Part No. 920160 Rev A
but could be
Wayne Vac error.
Is dispenser
Wayne Vac control
equipped with
YES
Wayne Vac ?
NO
openings.
Repair/replace
as necessary.
Is there dust on
YES
NO
Is disc tension
NO
correct?
3
YES
Check all wiring
Is the wiring and
YES
ISB assy OK?
NO
Replace photocoupler.
I S B a s s y .
Is the problem
YES
3
corrected?
NO
2

FIGURE A-5. FAULT CODE 05 OR 20.

Wayne Vac
error. See
Is LED on
service manual
YES
p/n 920023 for
board flashing ?
Wayne Vac
repair
procedures.
NO
Clean dust from
photocoupler. Check
and replace housing
if cracked. If problem
reoccurs replace
photocoupler.
Install wave washer if
one is not present.
Is the problem
NO
corrected?
YES
END
2
Replace the solenoid
drive board.
Is the problem
YES
corrected?
NO
Replace the
computer.
February 1997