TROUBLESHOOTING (cont.) |
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Problem | Possible Cause | Troubleshooting Procedure |
Automatic refill will not operate or display shows FILL TIME TOO LONG (cont.)
3.Refill Probe or Sensitivity Set- ting
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 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 opera- tion, 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.
4. | Refill Valve | Test the Refill valve. Refer to Testing |
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| Individual Components. |
5. | Overflow Protection Switch | When this condition occurs, the |
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| brewer will display OVERFLOW CUP |
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| FULL. EMPTY CUP. The reason for |
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| overfilling could be a defective refill |
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| valve, an incorrect sensitivity setting, |
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| (see above) or boiling. |
6. | Electronic Control Board | Substitute a control board known to |
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| be in good working order. |
Water flows into tank continuously 1. Refill valve | Foreign material lodged in valve, | |
with power removed from brewer. |
| holding it in open state. |
Page 45 | 35879.1 071405 |
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