Vollrath Stoelting O431, Service Manual

Page: 13 / 75

5
Figure 1-7 Serve Mode (Sensor Failure)
H. CLEAN MODE
When the CLEAN button is pressed, freezing cylinder
refrigeration stops, the drive motor starts and will run for
20 minutes, and a 5 minute countdown 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 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 - Trouble-
shooting for details). To clear this error, place the Freez-
ing 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 freezing cylinder.
The control maintains cabinet temperature between two
preset values (CabCutIn and CabCtOut). The cabinet
will operate automatically unless one of the following
conditions are met:
If the Main Power switch is in the OFF position
the Cab Off light on the front of the machine will
fl ash.
If the cabinet door is opened during a refrigeration
cycle, the evaporator fan will continue to run but
the refrigeration cycle will be interrupted to prevent
the evaporator coils from icing up.
If there is a High Pressure Cutout Error (E9) all
the refrigeration stops.
NOTE
If the temperature in the cabinet stays above 50°F
for more than two hours, the machine will go into
Sleep Mode and a clean message will be shown
on the display.
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 (DftOffTm) 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 cabi-
net, the cabinet refrigeration cycle is managed by preset
times (Cab On and Cab Off). This refrigeration cycle is
independent of the freezing cylinder 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
speci
fi c temperature and consistency irrespective of the
supply voltage. A motor pro fi 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 pro
fi le. This feature is
automatic and does not need any con fi guring.