Farm Fans C-2120A, Operator'S Manual, Page: 17 / 68

SHUTDOWN FEATURES
SHUTDOWN INDICATOR LIGHTS
The Shutdown Indicator Lights are connected within
the 115V safety control circuit to identify the causes of
unexpected dryer shutdown problems. These lights
are located on the ASC control panel and are identified
in Fig. 3-5.
NOTES:
• NO indicator light will come ON if a motor overload
relay trips open.
• The shutdown detector unit is designed so that if a
malfunction occurs within the unit, such as a bad light
or poor wiring connections, it will not prevent the dryer
from operating, but will only cause abnormal action of
the indicator lights.
RESTARTING DRYER AFTER A SHUTDOWN
1. Investigate the cause of shutdown and perform any
necessary adjustments or corrections. For addi tional
information, refer to "Control Circuit Not Energized"
heading within Section 9, TROUBLE SHOOTING. As a
future reference, it may be advisable to make a record
of the cause, as indicated by the shutdown indicator.
NOTE: On rare occasions, several dryer safety
devices may act to interrupt the safety control circuit
simultaneously. If this occurs, the LOWEST NUMBER
INDICATOR LIGHT on the detector will always take pri-
ority, as the unit is constructed to indicate only one
cause at a time.
2. Press the dryer START button. When the start button
is pressed, the dryer control light should come ON,
indicating that all safety devices have been reset and
the dryer is operational.
Following is a list of shutdown indicators. For the most
common shutdown causes, see Section 9,
Troubleshooting.
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SHUTDOWN INDICATOR LIGHTS - ASC PANEL
• LOW GRAIN (auto resets immediately)
• METER ROLL MONITOR (auto resets immediately)
• GRAIN HI-LIMIT (auto resets after cooling)
• BURNER HI-LIMIT (auto resets after cooling)
• PLENUM HI-LIMIT, upper & lower (auto resets after
cooling)
UNMONITORED SAFETY SHUTDOWN DEVICES
• Unload auger overload relay
• Load auger overload relay
• Upper fan overload relay
• Lower fan overload relay
• SCR overload relay
• Discharge shut-off switch
• Auxiliary load overload relay
Fig. 3-5 Shutdown indicator lights (For connection details and additional information, see Section
9 - Troubleshooting, and the safety circuit portion of the control circuit in Section 8.)