Cornelius signature, Service Manual, Page: 13 / 54

Signature Service Manual
© 2011, IMI Cornelius Inc. - 9 - Publication Number: 621058426SER
Error Conditions
Table 2 shows the possible system errors and a description of these errors. Figure 1
on page 5 shows the locations of the LED designations on the control panel.
NOTE: FL and a number indicates that the LED is flashing, L and a
number indicates that the LED is continuously on.
Table 2.
Display
Priority Display
Output
Error Description
1
FL2 &
FL3
Corrupted
Data
Occurs when the system reads the user settings
from EEPROM and it has become corrupted. The
unit shuts down and the EEPROM must be repro-
grammed.
2
L1, L2 &
L3
Stuck
Keypad
Occurs when any one of the keypad buttons is not
functional anymore. This error can be detected at
start-up or if a continuous key press is detected for
more than 1 minute during any run mode.
3 L1 & FL3
Motor
Calibration
Occurs only in the Service Mode when calibration
value is outside the +/-10% window from the fac-
tory reference value. Once started, the calibration
process requires 10 min. to complete. Any inter-
ruptions prevent the unit from performing a motor
calibration. The user can clear the error from the
front panel. (Press and Hold ON/OFF Button for 3
seconds).
4 FL1 & FL3 Barrel TCO
Occurs when any of the thermistors measure more
than 120°F for 10 seconds and the unit is in either
the REFRIGERATE or FREEZE Mode. It can only
be cleared by power cycling the unit.
5 L1 & L3
Machine
Disable
This error occurs when the faceplate switch is deac-
tivated. Motor power is not available (also see next
error). The unit is disabled until the faceplate is
properly installed.
6 FL1 & L3
AC Relay
Open
This error occurs when the motor controller does
not detect voltage available for the motors but the
faceplate is in place (can be refrigeration pressure
switch or related circuit element). It can only be
cleared by power cycling the unit.
7 FL1 & FL2
Hopper
Refrigera-
tion Error
This error is triggered when hopper temperature
does not pull down in a specified time when in
FREEZE or REFRIGERATE Mode. (Cut-in Temp +
13° F within 3 hrs.); it is assumed that the hopper
evaporator is malfunctioning. (This error timer is not
interrupted when the barrel takes refrigeration prior-
ity). The error timer is cleared when the hopper
goes into IDLE state. The error itself can only be
cleared by power cycling the unit.
8 L1 & L2
Barrel
Refrigera-
tion Error
This error is triggered when the barrel has been in
FREEZE or REFRIGERATE Mode (viscosity not
reached) for more than 40 min. Every handle activa-
tion (product dispense) resets the error timer. This
error can only be cleared by power cycling the unit.
9 L3 Motor Drive
This error can be caused by two states: it can occur
when the barrel motor command is on, but no motor
current is detected, such as if the motor is discon-
nected. This case can be cleared from the front
panel, which should be tried first (Turn unit OFF for
3 sec., then ON). However, it also occurs if the bar-
rel motor is turned off but motor current is still
detected; in this case, the error display will clear via
the front panel, but reoccurs IMMEDIATELY. Unit
must be power cycled to clear it.