Service manual

Quantum Series Installation and Service Manual
© 2002-2010, IMI Cornelius Inc. - 15 - Publication Number: 85289
Concentrate warm, water
cold
Concentrate thermostat is turned off or
not calibrated properly
Calibrate to be 34
o
F to 40
o
F (1.1
o
C to 4.5
o
C).
Concentrate thermostat defective (stuck
open)
Replace thermostat and calibrate to 34
o
F to 40
o
F (1.1
o
C to 4.5
o
C).
Defective start relay located on upper
rear shelf inside dispenser
There should be line voltage on the black wire of
the relay when there is line voltage present on the
orange OR yellow wire. Replace relay if it fails this
test.
Loss of refrigerant charge due to leak in
system
Repair leak and recharge system
BRIX Problem
Water supply pressure too low, less
than 20 psi (1.4 bar) flowing or water
pressure fluctuates sharply
Correct water supply problem to ensure a con-
stant 40 psi (3 bar) flowing to the dispenser
Water flow control binding or spring is
defective
Clean and/or replace parts as necessary
Improperly thawed concentrate. Brix
changes as the concentrate tempera-
ture changes (concentrate becomes
thinner as temperature rises)
Concentrate should 34
o
F -40
o
F (1.1
o
C –4.5
o
C)
prior to loading
Check that the rollers on the pump are
spinning freely with no tube in place
If they are sticky or locked up see platform
removal and cleaning procedure.
Pump Inoperative
Pump motor defective 28VDC should be present at pump motor during
dispense. If voltage is present and motor does not
start, replace pump motor
No power to transformer or no 28VAC
output from transformer
Confirm transformer has line voltage present on
primary side. If no 28VAC output from the second-
ary replace transformer
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 con-
trol, close door switch and short the orange and
black wires together on the harness. If unit dis-
penses portion control board is defective. If it does
not dispense the voltage regulator board is defec-
tive.
Machine continues to dis-
pense after dispense but-
ton is released or dispenses
without operator input
Portion control pad stuck in on position Disconnect the wire harness from the rear of the
portion control and close the door. If unit does not
dispense on its own the portion control is bad
(stuck on)
Relay on voltage regulator board (VRB)
stuck on.
Disconnect the 4-wire harness from the lower
right corner of the VRB. If the unit continues to
dispense on its own the VRB is defective (relay
stuck on)