Clean Mode; Mix Level Indicators; Storage Refrigeration; Operation During Sensor Failure - Stoelting F431 Service Manual

H. CLEAN MODE
When the CLEAN button is pressed on the left side, all
hopper refrigeration stops. When the CLEAN button is
pressed on the right side, only the right barrel freezing
cycle stops. In either case, the drive motor of that barrel
starts and will run for 20 minutes and a 5 minute count-
down timer is displayed. After the time has elapsed, an
optional audible alarm will sound if this accessory has been
installed. The audible alarm is a reminder for the operator
to end the "Clean Mode" when cleaning is completed.
If the machine is kept in "Clean Mode" for more than 20
minutes, the auger drive motor stops, the hopper refrig-
eration starts, and an error code (E4) is displayed on
the display panel. The error code prevents damage to
the machine that could occur during an extended clean
mode (Refer to Section 8 - Troubleshooting for details).
To clear this error, place the Freezing Cylinder Off-On
switch in the Off position and back in the On position. If
the machine is still being cleaned, pushing the CLEAN
button will reset the timer and restart the "Clean Mode".

1.4 MIX LEVEL INDICATORS

The cabinet is equipped with a capacitive sensor to moni-
tor mix level. When the mix level drops below the sensor
limit, the lower line of the display will read "Low Mix" and
the display will fl ash. To clear the "Low Mix" error, add
mix to the cabinet's mix container.

1.5 STORAGE REFRIGERATION

The IntelliTec control is programmed to handle refrigeration
of the cabinet independently from the barrel. The control
maintains cabinet temperature between two preset values
(CabCutIn and CabCtOut). If the cabinet door is opened
during a refrigeration cycle, the evaporator fan will con-
tinue to run but the refrigeration cycle will be interrupted
to prevent the evaporator coils from icing up.
Figure 1-7 Serve Mode (Sensor Failure)

1.6 OPERATION DURING SENSOR FAILURE

The IntelliTec control is designed to allow the machine to
continue to function if a temperature sensor failure oc-
curs. If a sensor fails, the display will show the error and
the control will run the machine on timers for the freezing
cycle or cabinet refrigeration. This allows the operator to
continue to serve product from the machine until proper
servicing can be completed.
A. SERVE AND STANDBY MODE
In the event of a temperature sensor failure on a freezing
cylinder, the IntelliTec control will function in two modes,
"Serve Mode" and "Standby Mode". When the product is
at consistency in "Serve Mode", the IntelliTec control uses
a timer instead of the sensor and will not start another
freezing cycle until a preset value (DftOffTme) is met.
The control will monitor product after it is at consistency,
activating the stir cycle and counting the number of cycles.
When the cycle count is reached, the control will move
to "Standby Mode".
The "Standby Mode" is the same as in normal operation
with the exception of when the preset time (Stb Time) is
met, the control moves back into the "Serve Mode". Refer
to Figure 1-7 for details.
B. CABINET REFRIGERATION
In the event of a temperature sensor failure in the cabinet,
the cabinet refrigeration cycle is managed by preset times
(Cab On and Cab Off). This refrigeration cycle is inde-
pendent of the barrel refrigeration and the cycle restarts
if the cabinet door is opened.
1.7 MOTOR PROFILE CUTOUT
COMPENSATION
The IntelliTec control is programmed to automatically
function at a range of supply voltages. This feature pro-
vides the advantage of having product maintained at a
specifi c temperature and consistency irrespective of the
supply voltage. A motor profi le curve is programmed on
the IntelliTec control and provides a relationship between
the supply voltage and drive motor cutout amperage. De-
pending on the supply voltage, the control varies cutout
amperage according to the motor profi le. This feature is
automatic and does not need any confi guring.
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