Vollrath Stoelting E111I, Service Manual

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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 hoppers are equipped with a sensor that monitors mix
level. When the mix level drops below the sensor probe,
the lower line of the display will read "Low Mix" and the
display will flash. To clear the "Low Mix" error, add mix to
the hopper.
1.5 HOPPER REFRIGERATION
The IntelliTec control is programmed to handle refrigera-
tion of the hopper independently from the freezing cylin-
der. The control maintains hopper temperature between
two preset values (HprCutIn and HprCtOut).
The hopper refrigeration cycle starts when the tempera-
ture of either hopper reaches the HprCutIn value and stops
when hopper reaches the HprCutOut value.
In addition to this refrigeration cycle, hopper refrigeration
may start when the freezing cycle starts. This reduces
compressor cycles which preserves compressor life.
Hopper refrigeration will start if the hopper temperature is
above a preset value (Hp HprCtOut). This value is
always between HprCutIn and HprCtOut. Refrigeration of
the hopper will continue until the HprCtOut is reached or
until the freezing cycle is completed in the freezing
cylinder.
The refrigeration cycle will run for a maximum of 4
minutes. After 4 minutes, the refrigeration cycle will stop
for a minimum of 3 minutes. At the expiration of 3 minutes,
the control will check product temperature. If product
temperature is at or above HprCutIn, another refrigeration
cycle will start.
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 hopper 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.
In the event a hopper temperature sensor fails, the control
will use the temperature of the other hopper to control the
refrigeration cycle.
If both temperature sensors fail, the refrigeration cycle is
managed by preset times (Hpr On and Hpr Off). This
refrigeration cycle is independent of the freezing cycle.
1.7 MOTOR PROFILE CUTOUT
COMPENSATION
The IntelliTec control is programmed to automatically
function at a range of supply voltages. This feature provides
the advantage of having product maintained at a specific
temperature and consistency irrespective of the supply
voltage. A motor profile curve is programmed on the
IntelliTec control and provides a relationship between the
supply voltage and drive motor cutout amperage. Depend-
ing on the supply voltage, the control varies cutout amper-
age according to the motor profile. This feature is automatic
and does not need any configuring.
Figure 1-7 Serve Mode (Sensor Failure)