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Concentrate warm,
water cold (con't)
Brix Problem
Pump Inoperative
720901120
Quantum Series Installation and Service Manual
Loss of refrigerant charge
due to leak in system
Water supply pressure too
low, less than 20 psi (1.4
bar) flowing or water
pressure fluctuates
sharply
Water flow control binding
or spring is defective
Improperly thawed concen-
trate. Brix changes as
the concentrate temper-
ature changes (concen-
trate becomes thinner
as temperature rises)
Check that the rollers on the
pump are spinning
freely with no tube in
place
Pump motor defective
No power to transformer or
no 28VAC output from
transformer
Defective voltage regulator
board (VRB) located
inside front electrical
box
Defective portion control
board
16 -
-
Repair leak and recharge system
Correct water supply problem to
ensure a constant 40 psi (3 bar)
flowing to the dispenser
Clean and/or replace parts as nec-
essary
o
Concentrate should 34
F -40
o
o
(1.1
C –4.5
C) prior to loading
If they are sticky or locked up see
platform removal and cleaning
procedure.
28VDC should be present at pump
motor during dispense. If volt-
age is present and motor does
not start, replace pump motor
Confirm transformer has line volt-
age present on primary side. If
no 28VAC output from the sec-
ondary replace transformer
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
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.
o
F
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