CIRCUIT BOARD FUNCTIONS continued...
SHUTDOWN SEQUENCE OF EVENTS
Once the AMERICAN HARVEST has reached the normal operating temperature and switched to the “OFF” position, the unit will continue to operate on a much lower setting for 10 minutes. (Approximately half of the “1” setting). After 10 minutes the auger will slow down further and continue at this feed rate until the AMERICAN HARVEST “LOW LIMIT SAFTEY” sensor tells the control board it is safe to shutdown.
COMPONENT | SHUTDOWN | OPERATION END |
Exhaust Blower | Unchanged operation until preset | Continues until the operating tempera- |
| “OFF” temperature is achieved. | ture falls below 90 degrees. May take |
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| several minutes up to an hour. |
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Agitator | Continues at a lower sequence | Continues until the operating tempera- |
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| ture falls below 90 degrees. |
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Auger | Slows down to a “HALF SETTING” for | The auger will continue at the lower |
| 10 minutes and then to a “QUARTER | feed rates until the operating |
| SETTING” for the duration of the shut- | temperature falls below 90 degrees. |
| down. | NOTE: Safety switches, HI limit and |
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| vacuum sensor, must be activated to |
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| continue proper operation. |
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Room Fan | Unchanged operation until preset | Will continue to operate until the |
| “OFF” temperature is achieved. | AMERICAN HARVEST cools down to |
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| below 90 degrees. This may take sev- |
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| eral minutes up to an hour. |
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Automatic Shutdown | If the American Harvest “HI LIMIT” | It is rare that the HI LIMIT temperature |
| sensor snaps open, this will cause an | is reached. However, should this error |
| automatic shutdown. This will be evi- | occur, let the AMERICAN HARVEST |
| dent by the green light on the control | cool down for an hour then restart. |
| board flashing. NOTE: “HI LIMIT” er- |
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| rors are usually the result of operating |
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| at the highest heat setting for long |
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| periods of time, room fan failure or |
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| loose wire connection. |
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CAUTION: When performing any internal electrical maintenance
•Moving parts inside of the cabinet may cause injury. Do not operate unit with panels removed or open.
•HOT parts. Do not operate the unit with panel open.
•Risk of electric shock. Disconnect power before servicing unit.
•In the event of component failure, replace with the original factory equipment.
18 | USSC |
