11
Model C300 NP Important: To the Operator
Operator Menu Timeout
If the display is left in the operator menu or any of
the operator menu selections, except for Current
Conditions, the display will return to the system
mode screen 60 seconds after the last keypress.
The Current Conditions screen will be displayed until
manually changed.
Finding Current Fault Conditions
Screen B is FAULT DESCRIPTION. The fault
description will indicate if there is a fault in one of the
freezing cylinders. When the actual fault is
corrected, the warning tone will stop. Only item 9
requires pressing the OFF (<- -) key t o clear the
fault message and the warning tone.

Fault Messages

Beater Overload Beater is out on overload.
Chk Refrig Sys Psi Compressor is out on high
head pressure.
Thermistor Short Shortedthermi stor probe.
Thermistor Open Open t hermistor probe.
H2O Pressure Low Water pressure is low.
CO2 Pressure Low CO2pressure is low.
Syrup Pressure
Low Syrup is no longer present.
BRLTemp2High Freezingcylinder
temperature is above 120°F
(49°C).
BRL Not Cooling Freezingcylinder is not
cooling after 5 minutes.
No Fault Found No fault conditions are
apparent.
The following are explanations of the possible faults
and the display screens. Lines 2 and 3 indicate the
faults found in freezing cylinders 1 and 2
respectively.
1. NO FAULT FOUND - No fault conditions are
apparent.
FAULT DESCRIPTION
L: NO FAULT FOUND
R: NOFAULT FOUND
CLR +++ SEL
2. BEATER OVERLOAD - Beater motor is out on
overload. When this fault occurs, the machine
automatically turns off. The fault clears when
the condition is corrected.
FAULT DESCRIPTION
L: BEATER OVERLOAD
R: BEATER OVERLOAD
CLR +++ SEL
3. CHK REFRIG SYS PSI - Compressor is out on
high head pressure. When this fault occurs, the
machine automatically turns off. The fault
clears when the condition is corrected.
FAULT DESCRIPTION
L: CHKREFRIG SYS PSI
R: CHK REFRIG SYS PSI
CLR +++ SEL
4. THERMISTOR SHORT - One or both of the
barrel (freezing cylinder) thermistor probes are
faulty.
FAULT DESCRIPTION
L: THERMISTOR SHORT
R: NOFAULT FOUND
CLR +++ SEL
5. THERMISTOR OPEN - One or both of the
barrel (freezing cylinder) thermistor probes are
faulty.
FAULT DESCRIPTION
L: THERMISTOROPEN
R: NOFAULT FOUND
CLR +++ SEL