Servicing Tip - Stoelting F431 Service Manual

ERROR CODE 11 - LOW TEMPERATURE
The Low Temperature Error (E11) occurs when
the temperature of the gas refrigerant at the barrel
sensor falls below -20°F or -34°F (depending
on model). Although the machine will not shut
down, the active freezing cycle will immediately
end. This error usually occurs when the machine
continues to run in a low mix condition or if the
machine runs out of mix. The product towards the
front of the barrel tends to freeze solid. When the
temperature on the freezing cylinder lowers to the
preset value, the IntelliTec control will display an
E11.
ERROR CODE 12 - LEFT HOPPER SENSOR
The Left Hopper Sensor Error (E12) indicates a
failure of the hopper sensor or an extreme out of
range condition (< -34°F or > 99°F). If the control
panel displays an E12, place the Freezing Cylinder
Off-On switch in the Off position and back in the
On position. If the control panel still displays
the error condition code, refer to the machine's
wiring diagram and the Temperature Sensor
Chart (Figure 11). Check each lead of the sensor
to ground for continuity. If continuity is found,
replace the sensor. To check the resistance of
the sensor, place a thermocouple on the suction
line at the exit of the freezing cylinder. Compare
temperature and sensor resistance with the table
as reference. If measured value does not coincide
with a value on the table (± 400 ohms), replace
the sensor.
ERROR CODE 13 - RIGHT HOPPER SENSOR
The Right Hopper Sensor Error (E13) indicates a
failure of the hopper sensor or an extreme out of
range condition (< -34°F or > 99°F). If the control
panel displays an E13, place the Freezing Cylinder
Off-On switch in the Off position and back in the
On position. If the control panel still displays
the error condition code, refer to the machine's
wiring diagram and the Temperature Sensor
Chart (Figure 11). Check each lead of the sensor
to ground for continuity. If continuity is found,
replace the sensor. To check the resistance of
the sensor, place a thermocouple on the suction
line at the exit of the freezing cylinder. Compare
temperature and sensor resistance with the table
as reference. If measured value does not coincide
with a value on the table (± 400 ohms), replace
the sensor.
COMMO TIMEOUT ERROR
A COMMO TIMEOUT Error indicates a
communication interruption between the display
and the control board. This error can be caused
by a poor connection or a faulty phone cable.
Disconnect and reconnect the telephone cable
at the control board. If the error does not clear,
disconnect and reconnect the telephone cable
at the display panel module. If the error still
appears, the cable may be faulty or the display
panel module may be faulty.
ALTERNATING FLASHING CONTROL PANEL LIGHTS
On machines with a Main Power Switch, when
this switch is placed in the ON position and the
Freezing Cylinder OFF/ON switch is in the OFF
position, the green and amber display panel lights
will fl ash in alternating sequence. This indicates
that the storage cabinet or hopper is being
refrigerated, but the left freezing cylinder is not
receiving power. Placing the Freezing Cylinder
OFF/ON switch in the ON position will return the
freezing cylinder to the SLEEP mode. Pressing the
PUSH TO FREEZE button will begin the freezing
cycle.
The display panel lights will also fl ash in an
alternating sequence under any error codes.
Clear the error and place the Freezing Cylinder
Off-On switch in the Off position and back in the
On position.

7.3 SERVICING TIP

PREVENT COMPRESSOR FROM RUNNING DURING
SERVICING
When servicing the machine, set the Refriger
setting on the left IntelliTec control from 1 Hopper, 2
Hopper or Cabinet to None (Refer to Section 3.3).
This will prevent the compressor from running.
When service work has been completed, change
the Refriger setting back to its previous value.
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