Wayne Vista Series - Flowchart A-5. 05 or 20 Fault Code

77
November 1992 Part No. 917543 Rev. A
2
05 or 20
fault code.
Pulse jitter error.
Check pulser disc for
cracks or blocked
openings.
Repair/replace
as necessary.
Is there dust on
the photocoupler?
Is there tension
on the pulser disc?
Check all connections
from the photocoupler
to the computer and
the solenoid drive
board.
Is the wiring OK?
Replace photocoupler.
Is the problem
corrected?
Replace the solenoid
drive board.
Is the problem
corrected?
Replace the
computer.
END
Clean dust from
photocoupler.
If problem
reoccurs replace
photocoupler.
Shim pulser
shaft.
Are the
pulser shaft and
the meter drive
gear aligned?
Align pulser shaft
and meter drive
gear.
2
NO
YES
NO
NO
YES
YES
NO
YES
NO
JDB FH-138-SM1
Repair/replace
the wiring.
Is the problem
corrected?
YES
3
3
YES
YES
NO
NO
FLOWCHART A-5. 05 OR 20 FAULT CODE