Flowchart A-13. 51 Fault Code - Wayne Vista Series Service

51 fault code.
Blend ratio error
programmed
Option 52
should be set at
5%. Option 53
should be set at
2 gallons. Reset
as necessary.
blend motor
move during
Check all valves and
tubes for flow
Is there any
restriction in the
Replace the
3
drive board.
Replace the
November 1992
exceeded
limits.
Does the Check the linkage to
the blend valve for
NO
binding. Correct as
reset?
YES
restriction.
YES
flow?
NO
solenoid
Is the
problem
YES
corrected?
NO
computer.
2

FLOWCHART A-13. 51 FAULT CODE

necessary.
Correct flow
restriction.
2
Is the
problem
corrected?
YES
NO
Check blend valve for
leaks between
chambers cracked
shoes. Repair/
replace as necessary.
Is the
problem
YES
corrected?
NO
Check F2 on the
computer. Replace
as necessary.
Is the
problem
YES
corrected?
NO
3
END
Part No. 917543 Rev. A
85