Manual Defrost Cycle Does Not Operate When ''Defrost'' Switch Is Pressed. (Cont'd); Defrost Cycle Does Not Cancel After Pressing ''Cancel Defrost '' Switch; Troubleshooting Product Blender Tanks And Carbonator; Carbonator Water Pump Motor Will Not Operate - Cornelius R-404A REFRIGERANT Service Manual
Fcb overcounter post-mix dispenser with v3+features (r-404a refrigerant)
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Trouble
MANUAL DEFROST CYCLE
DOES NOT OPERATE WHEN
''DEFROST'' SWITCH IS
PRESSED. (cont'd)
DEFROST CYCLE DOES NOT
CANCEL AFTER PRESSING
''CANCEL DEFROST ''
SWITCH.
TROUBLESHOOTING PRODUCT BLENDER TANKS AND CARBONATOR
CARBONATOR WATER PUMP
MOTOR WILL NOT OPERATE.
312028000
Probable Cause
E.
Master circuit board not
operating properly.
A.
Flat cable not properly
connected to control switch
module or master circuit
board.
B.
Flat cable connected between
control switch module and
master circuit board pinched
and shorted out or broken wire
in cable.
C.
Inoperable ''CANCEL
DEFROST'' switch on control
panel switch module.
D.
Master circuit board not
operating properly.
A.
No electrical power to Unit.
B.
''AUTO BLEND 1'' or ''AUTO
BLEND 2'' switches have not
been pressed.
C.
''H
O OUT'' fault message is
2
on.
D.
''CO
OUT'' fault message is
2
on.
E.
Loose or broken electrical
wires.
F.
Overheated water pump motor
cut off by overload protector.
G.
Binding water pump (new or
replacement pump only).
H.
Inoperative water pump and/or
motor.
I.
Inoperative carbonated water
tank level control switches.
J.
Binding, damaged, or dirty
carbonated water tank balance
mechanism.
K.
Inoperative water pump and/or
motor.
66
Remedy
E.
Replace master circuit board.
A.
Properly connect flat cable to
control switch module or master
circuit board.
B.
Check cable for pinched or
broken wire condition and repair
or replace as necessary.
C.
Replace control panel switch
module.
D.
Replace master circuit board.
A.
Connect electrical power to Unit.
Check power source.
B.
Press ''AUTO BLEND 1'' or
''AUTO BLEND 2'' switch.
C.
Restore water supply to Unit.
D.
Replenish CO
supply as
2
instructed.
E.
Tighten connections or replace
wires.
F.
Check for proper line voltage.
Check restricted pump discharge.
G.
Remove water pump from motor.
Rotate pump coupling shaft 180
degrees, then reinstall pump.
H.
Replace pump and/or motor.
I.
Replace level control switches.
J.
Clean, repair, or replace balance
mechanism.
K.
Replace water pump and/or
motor.
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Table of Contents
Troubleshooting
