Bunn New Infusion Series Programming Manual page 33

TROUBLESHOOTING (cont.)
PROBLEM
Water flows into tank continuously
with power removed from brewer.
PROBABLE CAUSE
1. Refill valve
2. Refill probe or sensitivity set-
ting
3. Control Board
Page 33
REMEDY
Foreign material lodged in valve,
holding it in open state.
Check the sensitivity setting. Refer
to the REFILL function. If the left
three digit number is less than the
right number, the machine "thinks"
it is full and the refill valve should
be off. If the left number is larger
than the right, then the refill valve
will automatically be turned on to
fill the tank. The right number is
the threshold setting and can be
adjusted to compensate for ex-
treme water conditions: very pure,
low conductance water requires a
higher setting, while high mineral
content, high conductance water
requires a lower setting. Note that
the left number changes from a high
value when water is NOT touching
the refill probe to a low valve when
water IS touching the probe. For
best operation, the right number
should be set to a value midway
between these low and high num-
bers. Before changing the setting,
confirm that the refill probe is free
of scale buildup and the connection
to it is secure.
Substitute a control board known
to be in good working order.
53867 050117