Shutdown Mode; Error Mode - SAWTOOTH SPG-410 Operating Manual

SHUTDOWN MODE

Shutdown Mode is possibly the most important mode for the system. It uses a procedure to gradually reduce the
amount of fuel in the combustion area to reduce the possibility of the flames entering the auger tube and starting a
fire in the hopper. It is strongly suggested that the shutdown procedure be used instead of simply unplugging the
system from the outlet to turn it off. To initiate shutdown from the Run Mode, press the On / Off button. Over a 30
minute period, the amount of fuel being provided will be gradually reduced to none. The fan will run continuously
to reduce the temperature. If the temperature is found to be less than 130°F at the end of the 30 minute shutdown
procedure, the fan will turn off, but if it is not, the fan will continue to run until the 130°F temperature is reached.
The shutdown procedure will not be attempted if the system has not reached the initial 150°F Run Mode setpoint
from startup.

ERROR MODE

If an error is detected, the system will perform the normal shutdown procedure regardless of the error value. The
system cannot run while an error is present. If an error has been detected, it can be cleared by pressing the On /
Off button to enter the Run Mode. However, if the cause of the error is still present it will enter the Error Mode
again.
ER-1 – Over Temperature Error – This error can be detected at any time, and simply means the Grill Probe
temperature exceeded 700°F. This can also be a sign of an open connection between the grill control and the Grill
Probe.
ER-2 – Failure to Start Error – Occurs when the ignition procedure fails to increase the temperature above 150°F
within a 30 minute window.
ER-3 – Power Failure Error – Occurs when the system is in the Run Mode and power is lost. When power is re-
applied if the system detects a temperature of less than 150°F, the assumption is that power was lost and the fire
went out while power was removed. It does not attempt to re-light the grill in this case. If power is re-applied
before the temperature falls, the system will return to the last setpoint and continue the Run Mode normally.
ER-4 – Grill Probe Short Circuit – Occurs when the system detects a shorted Grill Probe that cannot be used to
reliably measure temperature.
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