Partial Message Or Dull (Poorly Illuminated) Display - Cornelius FCB 3 H.P. POST-MIX DISPENSER Installation & Service Manual

Trouble
ALL CONTROL PANEL
SWITCHES NOT OPERATING.
(cond't)
CONTROL PANEL SWITCHES
CANNOT BE DEACTIVATED.
PARTIAL MESSAGE OR DULL
(POORLY ILLUMINATED)
DISPLAY.
ONE OR MORE FAULT
MESSAGES NOT
OPERATING.
ALL FAULT MESSAGES NOT
OPERATING.
312026000
Probable Cause
E. Flat cable connected between
control switch module and
master circuit board pinched
and shorted out or broken wire
in cable.
F. Master circuit board not
operating properly.
A. Not pressing and holding
''SECURITY SWITCH'' for
3–seconds to deactivate
control switches.
B. ''SECURITY SWITCH''
inoperable.
A. Extremely low voltage.
A. Flat cable not properly
connected to fault message
module or master circuit
board.
B. Flat cable connected between
fault message module and
master circuit board pinched
and shorted out or broken wire
in cable.
C. External sensing device failing
to signal master circuit board
which in turn signals fault
message display.
D. External sensing devices cable
connectors not securely
connected to master circuit
board connectors.
E. Disconnected or broken wire
between master circuit board
connector and external
sensing device.
F. Master circuit board not
operating properly.
G. Fault message display
module not operating properly.
A. No electrical power to Unit.
B. Flat cable not properly
connected to fault message
module or master circuit
board.
C. Flat cable connected between
fault message module and
master circuit board pinched
and shorted out or broken wire
in cable.
64
Remedy
E. Check cable for pinched or
broken wire condition and repair
or replace as necessary.
F. Replace master circuit board.
A. Press and hold ''SECURITY
SWITCH'' for 3–seconds to
deactivate control switches.
B. Replace control panel switch
module.
A. Upgrade voltage.
A. Properly connect flat cable to fault
message module or master circuit
board.
B. Check cable for pinched or
broken wire condition and repair
or replace as necessary.
C. Replace or repair external sensing
device.
D. Make sure external sensing
devices cable connectors are
securely connected to master
circuit board connectors.
E. Connect or repair wire between
master circuit board connector
and external sensing device.
F. Replace master circuit board.
G. Replace fault message display
module.
A. Connect electrical power to Unit.
B. Properly connect flat cable to fault
message module or master circuit
board.
C. Check cable for pinched or
broken wire condition and repair
or replace as necessary.