TROUBLESHOOTING (cont.)
HEATING CIRCUIT (cont.)
PROBLEM |
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| PROBABLE CAUSE |
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| REMEDY |
Water does not heat to proper | 4a. Temperature Probe | A) Remove the probe from the grom- | ||||
temperature (cont.) | TC/TS/TSR) | met and submerge in a water bath | ||||
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| of approximately 70°F(21°C). Con- | |
IMPORTANT: Make sure no tem- |
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| nect an ohmmeter to pins 3 and 4 of | ||
perature tests are taken before the |
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| the J3 connector. At 60°F(16°C) | ||
ready light is "ON". Tank tempera- |
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| the reading should be 15.3k ± 2k | ||
ture must be stabilized before read- |
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| OHMS, at 70°F(21°C) the reading | ||
ings are taken. |
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| should be 11.8k ± 2k OHMS, and at | ||
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| 80°F(27°C) the reading should be | |
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| 9.3k ± 2k OHMS. If the probe is | |
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| within these parameters, reconnect | |
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| 4b. Temperature Probe | the J3 plug to the control board. | |||
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| TS/TSR) | B) Remove the probe from the grom- | |||
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| met and submerge in a water bath | |
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| of approximately 70°F(21°C). Con- | |
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| nect an ohmmeter to pins 2 and 3 of | |
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| the J5 connector. At 60°F(16°C) | |
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| the reading should be 15.3k ± 2k | |
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| OHMS, at 70°F(21°C) the reading | |
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| should be 11.8k ± 2k OHMS, and at | |
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| 80°F(27°C) the reading should be | |
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| 9.3k ± 2k OHMS. If the probe is | |
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| within these parameters, reconnect | |
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| the J5 plug to the control board. | |
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| 5. Limit Thermostat | Disconnect the brewer from the | |||
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| TC/TS/TSR & | power source. Check for continuity | |||
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| across the limit thermostat termi- | |
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| nals. Continuity should be present. | |
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| If not replace the limit thermostat. | |
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| (See page 27) | |
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| 6. Tank Heater | Disconnect the brewer from the | |||
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| TSR & | power source. Check for continuity | |||
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| between the white terminal of the | |
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| terminal block and the black wire on | |
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| the relay on the control board. There | |
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| should be a low OHM reading. If no | |
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| continuity is present, check for a | |
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| wiring problem, then replace the | |
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| tank heater if no wiring problem is | |
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| found. (See page 28) | |
Spitting or excessive steaming | 1. Lime build up on temperature |
| probe, tank or tank heater |
Inspect probe and tank assembly for excessive lime deposits. Delime as required.
Page 14 | 29253 111103 |
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