Service manual

Quantum Series Installation and Service Manual
© 2002-2010, IMI Cornelius Inc. - 13 - Publication Number: 85289
No water dispensed, con-
centrate only.
No water to dispenser Restore water
Water supply line inside refrigerated cab-
inet disconnected from pump platform
Reconnect
Water solenoid located on pump plat-
form clogged or defective
Disassemble and clean solenoid. Replace if nec-
essary.
Main water solenoid/strainer located at
base of dispenser is clogged, binding or
defective
Remove and clean strainer. Confirm 28VDC is pres-
ent at solenoid during dispense. Confirm solenoid
coil is not open. Disassemble and clean solenoid.
Water supply pressure is greater than
80 psi (5.5 bar)
Add external regulator and lower pressure to 50
psi (3.5 bar)
Freeze-up of water coil or concentrate
chamber
Unplug dispenser and allow 2-4 hours to thaw.
Water or concentrate thermostat set too low, reca-
librate 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 an3d no concen-
trate, 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 concen-
trate, 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 necessary
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.
No concentrate dispensed,
water only
Dispense tube not fully engaged into
receptacle on concentrate pouch
Refer to
Concentrate Loading section of this man-
ual
Dispense tube disconnected from mix-
ing chamber
Refer to
Concentrate Loading section of this man-
ual
Slide block on pump in open position Close and lock the slide block. Refer to
Concen-
trate Loading section of this manual
Switch on pump platform in FLUSH
position
Move switch to RUN position
Concentrate too cold, not properly
thawed
Concentrate should be 34
o
F to 40
o
F (1.1
o
C to
4.5
o
C) prior to loading
Defective pump motor Replace pump motor