Page 46
Troubleshooting Procedure
TROUBLESHOOTING (cont.)
Problem
Possible Cause
Automatic refi ll will not operate or
display shows FILL TIME TOO LONG
(cont.)
Water fl ows into tank continuously
with power removed from brewer.
3. Refi ll Probe or Sensitivity Set-
ting
4. Refi ll Valve
5. Overfl ow Protection Switch
6. Electronic Control Board
1. Refi ll valve
Check the sensitivity setting. Refer to
Refi ll function. If the left three digit
number is less than the right number,
the machine “thinks” it is full and the
refi ll valve should be off. If the left
number is larger than the right, then
the refi ll valve will automatically be
turned on to fi ll 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 refi ll 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, confi rm that the
refi ll probe is free of scale buildup
and the connection to it is secure.
Test the Refi ll valve. Refer to Testing
Individual Components.
When this condition occurs, the
brewer will display OVERFLOW CUP
FULL. EMPTY CUP. The reason for
overfi lling could be a defective refi ll
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
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