TROUBLESHOOTING (cont.) |
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HEATING CIRCUIT (cont.) |
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PROBLEM |
| PROBABLE CAUSE |
Water does not heat to proper | 4. Temperature Probe | |
temperature (cont.) |
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IMPORTANT: Make sure no tem- |
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perature tests are taken before the |
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ready light is "ON". Tank tempera- |
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ture must be stabilized before read- |
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ings are taken. |
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5. Limit Thermostat
6. Tank Heater
Spitting or excessive steaming | 1. Lime build up on temperature |
| probe, tank or tank heater |
REMEDY
Remove the probe from the grom- met and submerge in a water bath of approximately 70°F(21°C). Con- nect an ohmmeter to pins 3 and 4 of the J3 connector. At 60°F(16°C) the reading should be 15.3k ± 2k OHMS, at 70°F(21°C) the reading should be 11.8k ± 2k OHMS, and at 80°F(27°C) the reading should be 9.3k ± 2k OHMS. If the probe is within these parameters, recon- nect the J3 plug to the control board.
Disconnect the brewer from the power source. Check for continu- ity across the limit thermostat ter- minals. Continuity should be present. If not replace the limit thermostat.(See page 26)
Disconnect the brewer from the power source. Check for continu- ity between the white terminal of the terminal block (or Red termi- nal on 208/240 volt models) and the black wire on the relay on the control board. There should be a low OHM reading. If no continuity is present, check for a wiring prob- lem, then replace the tank heater if no wiring problem is found. (See page 27)
Inspect probe and tank assembly for excessive lime deposits. Delime as required.
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