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Troubleshooting Procedure
TROUBLESHOOTING (cont.)
Problem
Possible Cause
Automatic refill will not operate or
display shows FILL TIME TOO LONG
(cont.)
Water flows into tank continuously
with power removed from brewer.
3. Refill Probe or Sensitivity Set-
ting
4. Refill Valve
5. Overflow Protection Switch
6. Electronic Control Board
1. Refill valve
Check the sensitivity setting. Refer to
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
extreme 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 value when
water IS touching the probe. For best
operation, the right number should
be set to a value midway between
these low and high numbers. Before
changing the setting, confirm that the
refill probe is free of scale buildup
and the connection to it is secure.
Test the Refill valve. Refer to Testing
Individual Components.
When this condition occurs, the
brewer will display OVERFLOW CUP
FULL. EMPTY CUP. The reason for
overfilling could be a defective refill
valve, an incorrect sensitivity setting,
(see above) or boiling.
Substitute a control board known to
be in good working order.
Foreign material lodged in valve,
holding it in open state.
29877-3 062005