Cornelius QUANTUM SERIES - Manual (Page 15)

Quantum Series Installation and Service Manual
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No water dispensed,
concentrate only
(con’t).
Freeze-up of water coil or
concentrate chamber
Unplug dispenser and allow 2-4
hours to thaw. Water or concen-
trate thermostat set too low,
recalibrate to 34 o F -40 o F (1.1
o C - 4.5 o C).
Defective water or concentrate
thermostat, replace.
Refrigerant solenoid stuck open
or not closing fully. Evacuate
system, replace solenoid valve
and recharge
No water and no con-
centrate, refrigeration is
working Service switch located
under drip tray in OFF
position
Turn on switch
Door switch open Door switch must be closed in
order to operate pump. Check
switch operation and replace if
necessary
No water and no con-
centrate, refrigeration is
working 6.25 amp Fuse inside front
electrical box blown
Replace with 6.25 amp, 250VAC
slow blow fuse and test
No output from Transformer
located on rear upper
shelf
Confirm transformer output by
measuring for 26VAC at fuse.
Replace transformer if neces-
sary
Defective voltage regulator
board (VRB) located
inside front electrical
box
Measure across the blue and black
wire located in the upper left
corner of the board. There
should be 28VDC present when
the dispense button is pressed.
Replace VRB if necessary
Defective portion control
board
Disconnect wire harness from rear
of portion control, close door
switch and short the orange
and black wires together on the
harness. If unit dispenses por-
tion control board is defective. If
it does not dispense the voltage
regulator board is defective.