Vollrath Stoelting E131-OT2, Service Manual

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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.

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 refrigera-
tion 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 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 refrigeration
of the hopper independently from the freezing cylinder. The
left control maintains hopper temperature between two
preset values (HprCutIn and HprCtOut).

NOTE

The Refriger setting should be 2 Hopper for the Left
control and None for the right control.

The hopper refrigeration cycle starts when the temperature
of either hopper reaches the HprCutIn value and stops when
both hoppers reach 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. Hop-
per 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 hop-
per 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 tempera-
ture is at or above HprCutIn, another refrigeration cycle will
start.

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 occurs.
If a sensor fails, the display will show the error and the

Figure 1-7 Serve Mode (Sensor Failure)

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