10. Troubleshooting
Problem | Possible Cause |
|
|
Display shows “HOUSING HIGH TEMPERATURE” | The temperature |
message. | opened, indicating an over temperature condition has occurred |
| towards the rear of the fan/heater housing. (This control is a 200°F |
| limit control that must be manually reset.) |
Display shows “REAR DISCHARGE WARNING” | The cover on the grain discharge box has opened, indicating that |
message. | grain is backing up into the discharge box. |
Display shows “OUT OF GRAIN” message. | The dryer has run low on grain, and the out of grain timer has timed |
| out shutting the dryer down. The unload auger will then |
| the dryer, if the unload switch is ON during continuous flow |
| operation. Check the out of grain timer setting, and if necessary |
| adjust. Also, before restarting, inspect load equipment for possible |
| damage or adjustment. |
Display shows “PLENUM HIGH TEMPERATURE” | An over temperature condition has occurred inside the dryer |
message. | Plenum. (This control is a 300°F limit which automatically resets |
| when it cools.) |
Display shows “NO AIRFLOW” message. | The air switch contacts have opened, indicating the fan may not be |
| turning. The air switch may need adjustment. |
Display shows “Grain High Temperature” message | An over temperature condition has occurred in the Dryer Grain |
| Columns. This control is a 200°F limit which automatically resets |
| when it cools. It may require the use of the Emergency Cool |
| Feature as described on Page 18. |
Display shows “Grain High Temperature” and | One of both of the mechanical |
“Plenum High Temperature” messages at the | column have tripped. Note that the Emergency Cooling |
same time | Feature will not work in this case, open the back access door to |
| help speed the cooling of the grain. Replace the mechanical |
| sensor if faulty. |
Fan motor does not start. | 1. Check that the fan circuit breaker and the FAN switch are ON. |
| Also, check for defective switch or bad wiring connections. |
| 2. If lighted switch does not light, the air switch needs adjustment, |
| or the bulb may be burned out. |
| 3. Verify closing of fan motor contactor. Check voltage on load side |
| of contactor. See appropriate power Wiring Diagrams for |
| terminal numbers. Inspect contactor for defective points or a |
| burned out coil. |
| 4. Inspect connections, and check voltage applied to the |
| motor leads in the fan heater box to determine if the motor |
| is defective. |
| 5. Check capacitors on single phase motors, and replace if |
| defective. If motor starts slowly, check for low voltage during |
| starting due to excessive voltage drop in power supply wiring. |
Top auger does not start. | 1. Check that the top auger circuit breaker and the load auger |
| switch are turned ON. |
| 2. If lighted switch does not light, the output power to the contactor |
| is missing. Check connections, or if the bulb is burned out. |
| 3. Check position of the upper auger paddle switch. It must be |
| down to start auger. |
| 4. Inspect for secure mounting and wiring of mercury switch in the |
| terminal box on the top auger paddle switch shaft. Include check |
| for a defective mercury switch. |
| 5. Verify closing of the top auger contactor. Check voltage on load |
| side of contactor. Inspect contactor for defective points, or a |
| burned out coil. |
| 6. Inspect connections, and check voltage applied to motor leads in |
| motor junction box to determine if motor is defective. |
| 7. Check that the mercury switch box is in the proper position. |
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