Vollrath Stoelting O431, Service Manual

Page: 12 / 75

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The “Standby Mode” maintains product quality during
slow times, while minimizing reactivation time. This mode
lasts for a preset time (Stb Time). Once this time has been
reached without user interruption, the control moves into
the “Sleep 1 Mode”. Refer to Figure 1-4 for a graphical
representation of the “Standby Mode”.
If a spigot is opened or the PUSH TO FREEZE button is
pressed, the control will move to “Serve Mode”. Product
in the front of the freezing cylinders may or may not be at
consistency. The state of the product is dependant on a
number of variables but will come to consistency quickly.
D. SLEEP 1 MODE
After the “Standby Mode” time has expired without user
interruption, the control will move into the “Sleep 1 Mode”.
During the “Sleep 1 Mode”, the stir cycle is handled by
preset timers (Sl1DrvOn and Sl1DrOff), and allows product
to melt to a liquid state by using agitation cycles without
any
fl ow of refrigerant. Although the product temperature
never increases above 41°F, the product thaws rapidly
which minimizes product breakdown. The control will stay
in the “Sleep 1 Mode” until sensing a preset temperature
(Sl2CutIn). When this temperature has been reached with-
out user interruption, the control will move to the “Sleep 2
Mode”. Refer to Figure 1-5 for a graphical representation
of the “Sleep 1 Mode”.
If a spigot is opened or the PUSH TO FREEZE button is
pressed, the control will move to “Serve Mode”. If the spigot
is opened in “Sleep 1 Mode”, the product will not be at
consistency. The operator must wait until the
fi rst “Serve
Mode” freezing cycle has completed to serve product.
E. SLEEP 2 MODE
The “Sleep 2 Mode” maintains the freezing cylinder
temperature between two preset values (Sl2CutIn and
Sl2CtOut). During the “Sleep 2 Mode”, the stir cycle
runs. This cycle is based on preset, timed intervals (Stir
On and Stir Off) and prevents product separation. The
“Sleep 2 Mode” is often referred to by customers as the
“night mode” and the machine will stay in this mode until
a spigot is opened or the PUSH TO FREEZE button is
Figure 1-5 Sleep 1 Mode
Figure 1-6 Sleep 2 Mode
pressed. When this occurs, the control will move to “Serve
Mode”. If the spigot is opened at this time, the product
will be liquid. The operator must wait until the
fi rst “Serve
Mode” freezing cycle has completed to serve product.
Refer to Figure 1-6 for a graphical representation of the
“Sleep 2 Mode”.
F. INTELLITEC RESTART
If a hard error occurs (refer the hard error list below), the
IntelliTec control will wait 5 minutes then attempt to clear
the error by restarting itself. The control will count each
restart attempt. The restart count will reset if the PUSH
TO FREEZE button is pressed, the spigot is pulled, or
the Freezing Cylinder OFF/ON switch is placed in the
OFF position.
The following are considered hard errors:
ERROR CODE MALFUNCTION
2 High Torque
3 Run Time
4 Clean
7 Drive Motor
9 High Pressure Cutout
When a restart occurs, the second line of the display will
read “Restart” and the backlight will blink. This will occur
regardless of the system mode.
G. SLEEP 3 MODE
If a high torque, run time, or drive motor error condition
occurs on the third restart attempt, the control will move
to the “Sleep 3 Mode”.
In “Sleep 3 Mode” freezing cylinder refrigeration will run
for 4 seconds every 10 minutes. This ensures the product
temperature never increases above 41°F. The stir cycle
and the auger do not run during “Sleep 3 Mode”.
The control will exit “Sleep 3 Mode” if the PUSH TO
FREEZE button is pressed, the spigot is pulled, or the
Freezing Cylinder OFF/ON switch is placed in the OFF
position.