Cornelius Quest NT 4000 User manual

QUEST NT
4000
Service Manual
Release Date: February 19, 2004
Publication Number: 720901117SER
Revision Date: November 23, 2004
Revision: C
Visit the IMI Cornelius web site at www.cornelius.com for all your Literature needs.
®

QUEST NT 4000
SERVICE MANUAL
The products, technical information, and instructions contained in this manual are subject
to change without notice. These instructions are not intended to cover all details or varia-
tions of the equipment, nor to provide for every possible contingency in the installation,
operation or maintenance of this equipment. This manual assumes that the person(s)
working on the equipment have been trained and are skilled in working with electrical,
plumbing, pneumatic, and mechanical equipment. It is assumed that appropriate safety
precautions are taken and that all local safety and construction requirements are being
met, in addition to the information contained in this manual.
To inquire about current revisions of this and other documentation or for assistance with
any Cornelius product contact:
Trademarks and copyrights:
Aurora, Cornelius, Decade, Hydro Boost, Sitco, Spirit, UF-1, Vanguard, Venture, Olympus,
and Vista are registered trademarks of IMI Cornelius Inc.
Optifill trademark is pending.
This document contains proprietary information and it may not be
reproduced in any way without permission from Cornelius.
Printed in U.S.A.
Copyright © 2004, All Rights Reserved, IMI Cornelius Inc.
IMI Cornelius Inc.
Corporate Headquarters
One Cornelius Place
Anoka, MN 55303-6234
U.S.A.
Internet:
www.cornelius.com
Email:
[e-mail]
In the U.S.A.:
phone:[phone]
800-238-3600
FAX:[phone]
Outside the U.S.A.:
phone:[phone]
FAX:[phone]

TABLE OF CONTENTS
UNIT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Concentrate Handling & Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Loading Concentrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Changing Concentrate Containers: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Brixing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Checking/Adjusting the Brix Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Planned Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Daily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Flush System: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Clean Splash Zones & Dispense Nozzles: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Weekly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Sanitize the Juice Dispenser: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Semi-Annual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Clean Water Inlet Strainer: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Clean Chassis Interior: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Check and Top-Off Water Ice Bath: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Annually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Replace Pump Tubing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Removing Pump Platform(s): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Replacing Pump Tubing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Main Electrical Box Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Quest Series Juice Dispenser - 115VAC (based on 10 machines) . . . . . . . . . . . . . 15
Quest Series Juice Dispenser - 230VAC (based on 10 machines) . . . . . . . . . . . . . 16
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
IMI CORNELIUS INC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Quest Service Manual
© 2004, IMI Cornelius Inc. - 1 - Publication Number: 720901117SER
UNIT SPECIFICATIONS
Nameplate Data: Model QST 4000, 115 VAC, 4.5 amps, 1 phase 60 hertz, 6.75 oz. (191-193g) R-134a
refrigerant. Test press: High side 400 psi (27.6 bar). Low side 100 psi (6.9 bar).
Model QST 4000, 230 VAC, 3 amps, 1 phase 60hertz, 6.75 oz. (191-193g) R-134a refrigerant. Test
press: High side 400 psi (27.6 bar. Low side 100 psi (6.9 bar).
Concentrate Storage: Four 0.8 gallon (3.0 liter) disposable bottles.
Clearance Recommended: 12”(30.48 cm) on top and 4”(10.16 cm) required in back for air circulation.
Electrical Connection: 6 ft. long (1.83 m) power cord with 3-prong plug attached to dispenser. Export
models have line cord less plug.
Power Supply: 15 amps at 120 volts dedicated power supply.
10 amps at 230 volts dedicated power supply.
Water Connection: 3/8 in. (0.95 cm) SAE male flare fitting on dispenser.
Water Supply Requirements: 80 psi (5.5 bar) maximum static pressure. 20 psi (1.4 bar) minimum
dynamic pressure; i.e., flowing pressure measured at dispenser water inlet with 3.0 ounces (88.7 ml) per
second water flow, see part number 720901017 Rev. D for reference.
Ice Bank/Pull Down: Weight 14-16 lbs. Pull Down: 3.5 - 5 hours at 75°F (24°C)

Quest Service Manual
Publication Number: 720901117SER - 2 - © 2004, IMI Cornelius Inc.
CONCENTRATE HANDLING & LOADING
It is recommended that the concentrate be thawed in a refrigerated 35°F-40°F (1.6°C-4.4°C) compart-
ment for a minimum of 48 hours prior to loading into the Quest Juice Dispenser.
WARNING: Concentrate must be completely thawed and within the temperature range of 35°F-
40°F (1.6°C-4.4°C) prior to loading. Failing to supply concentrate inside the recommended tem-
perature range, especially below 35°F (1.6°C), will cause an out of brix drink (refer to the Brixing
Procedure section for details).
LOADING CONCENTRATE
The Quest Juice Dispenser is designed to use either disposable juice concentrate
containers or the optional Cornelius generic refillable container sold separately.
1. Thoroughly shake concentrate prior to use.
2. Place concentrate containers on the dispensing platform shelf inside the refriger-
ated cabinet.
3. Engage the concentrate container by pressing it downward into the bottle
adapter opening on the dispensing platform.
NOTE: Be sure to lubricate the o-ring seal on the container nozzle. This will ensure a good seal
and allow the pumps to draw concentrated from the containers more easily. Failure to create a
good seal at this connection may result in weak drinks and/or seepage of concentrate.
4. Prime each pump by closing the cabinet door and press each dispense button until concentrate
flows from the dispense nozzles.
CHANGING CONCENTRATE CONTAINERS:
1. Open the cabinet door and move the valve handle from “Dispense”to “Flush”
2. Close the door. Depress and hold the dispense button until clear water flows from the dispense noz-
zle.
3. Open the cabinet door and return the handle to “Dispense”.
4. Depress and hold the dispense button for 1-2 seconds. This will relieve water pressure from the
concentrate pump system.
5. Load concentrate container (see
Loading Concentrate ).

Quest Service Manual
© 2004, IMI Cornelius Inc. - 3 - Publication Number: 720901117SER
BRIXING PROCEDURE
NOTE: If concentrate is not properly thawed, it will adversely affect the amount of concentrate
dispensed. Thawed product should be between 35°F/1.6°C to 40°F/4.4°C.
SUPPLIES
•1-Small 12 oz. cup (354.8 ml)
•1-Large 21 oz. cup (621.1 ml)
•1-Straw
•Paper Toweling
•1-Thermometer
•1-Refractometer
Your will also need a flat blade screwdriver to turn a screw if brix adjustments are required.
NOTE: The refractometer shown above, P/N 511004000, is available through your local Cornelius
Distributor.
CHECKING/ADJUSTING THE BRIX SETTING
The following instructions are for use with a refractometer.
1. Dispense approximately 8 oz. (236 ml) of drink and discard. Now draw a second 8 oz. drink.
2. Check drink temperature with a reliable thermometer (target is 35-45°F, or 1.6-7.2°C). Discard this
drink after checking temperature.
NOTE: If drink temperature is not within the target range, refer to the basic troubleshooting sec-
tion.
3. Dispense a 12 oz (354.8 ml) drink sample into a clean, dry cup. Thoroughly stir the sample using a
straw.
4. Using a straw, transfer a small sample of finished drink to the refractometer lens (refer to operating
instructions supplied with your refractometer). Check the brix reading against the brix chart below.
NOTE: The following brix chart is generic and intended for reference use only. Contact your fro-
zen concentrate supplier for specific brix readings.
Brix Reference Chart
Flavor Ratio Brix
Orange Juice 4+1 11.8
Grapefruit Juice 5+1 10.6
Cranberry Cocktail 4+1 13.5
Apple Juice 5+1 12.0
Grape 5+1 13.0
Lemonade 5+1 10.5
Tropical Punch 5+1 11.8
Sweetened Iced Tea 7+1 6.0
Pineapple Juice 4+1 12.8
Prune Juice 2+1 16.0

Quest Service Manual
Publication Number: 720901117SER - 4 - © 2004, IMI Cornelius Inc.
5. To change the brix setting, simply readjust the water flow rate.
Located on each of the valve assemblies inside the refrigerated
compartment are the adjusting screws for the water flow rate (one
per valve).
If the brix reading is too high or low, rotate the appropriate water flow
control according to the diagram below. Repeat steps 1-5 until the brix
setting is achieved.
IMPORTANT: When making changes to the water flow control, do not rotate more than 1/4 turn
per adjustment. Additionally, prior to taking your next brix reading, “tap” the corresponding dis-
pense button several times prior to drawing a sample. This will clear remnant drink from the dis-
pense nozzle AND help move the flow control to its new setting.
Lowers Brix by increasing water
Raises Brix by reducing water

Quest Service Manual
© 2004, IMI Cornelius Inc. - 5 - Publication Number: 720901117SER
PLANNED MAINTENANCE SCHEDULE
DAILY
Flush System:
1. Move Dispense/Flush levers located on the platform assembly in
the refrigerated cabinet to the “Flush”position. Place an empty
cup on the drip tray below each dispense nozzle.
2. Close the door and depress each dispense button for 2-3 sec-
onds or until clear water flows from each dispense nozzle.
3. Return the Dispense/Flush levers to the “Dispense”position.
4. Press each dispense button for 1-2 seconds to release the water
pressure present in the concentrate pump system.
Clean Splash Zones & Dispense Nozzles:
1. On a daily basis, clean the external cabinet and
splash areas using a clean damp cloth. Remove
and wash the cup rest and drip tray using a mild
dish soap.
2. Remove the dispense nozzles and static mixers
by rotating each 90°and pulling down. Remove
the mixing chambers by pulling straight forward.
Wash using a mild dish soap.
IMPORTANT: DO NOT wash nozzles, static mixers, or mixing chambers in a dish washer. This
will distort the plastic and damage the o-rings. Additionally, do not soak them in sanitizing solu-
tion longer than 2 minutes.
WEEKLY
Check concentrate to water brix ratio (refer to the Brixing Procedure in this manual).
Sanitize the Juice Dispenser:
Step 1 - Rinse With Hot Water
1. Prepare two 2 oz. packets of Stera-Sheen Green Label sanitizing solution (or similar brand) by dis-
solving each packet in 1 gallon (3.8L) of potable water to insure 200 ppm of available chlorine.
IMPORTANT: Use potable water at 80°F-100°F (26.7°C-37.8°C). Water above this range will break-
down the chlorine count and minimize sanitation.
2. Remove the juice concentrate containers and place them in separate refrigerated compartment.
3. “Flush”the system by following the instructions in the Daily Section.
4. Fill a clean empty concentrate container with one quart of extremely hot tap water, approximately
140°F (60°C) and place into unit. Dispense all of the hot water into a large container. Repeat for the
remaining dispense valves.
5. Remove the mixing chambers, nozzles, and static mixers. Rinse in hot water to remove excess pulp
and concentrate.
6. Place the mixing chambers, nozzles, and static mixers in a separate container of sanitizing solution
and agitate vigorously. Allow the parts to soak for two minutes. Rinse thoroughly with fresh tap
water.
7. Reinstall the static mixer, nozzles, and mixing chambers.

Quest Service Manual
Publication Number: 720901117SER - 6 - © 2004, IMI Cornelius Inc.
Step 2 - Sanitize Pump System
1. Fill a clean concentrate container with 2 quarts (1.9L) of fresh sanitizing solution.
2. Place handles in the “dispense”position and close the door.
3. Press and hold the dispense button for 90 seconds then stop. Allow sanitizing solution to remain in
the lines for 5 minutes.
4. After 5 minutes, dispense the remaining sanitizing solution.
Step 3 - Prepare Dispenser for Use
1. Replace sanitizing solution container with a concentrate container and close the door.
2. Press and hold the dispense button until juice appears from the nozzle. Next dispense and discard
at least two 8 oz. (236.6ML) cups of juice in order to prime the system and prepare it for operation.
SEMI-ANNUAL
CAUTION: The following procedures require removal of the dispenser side panel(s). Disconnect
the power cord from the receptacle prior to proceeding.
Clean Water Inlet Strainer:
1. Remove the right side panel from the dispenser.
2. Turn off the water supply to the dispenser.
3. Remove the access port from the “Y”shaped water inlet solenoid
located on the right side of the dispenser.
4. Clean and reinstall the stainless steel water strainer.
Clean Chassis Interior:
1. Clean the condenser cooling fins.
2. Clean the air inlet grilles located on the rear and top panels of the dis-
penser.
3. Clean the interior base.
4. Wipe the fan blade clean.
5. Reinstall the right side panel, turn on the water supply, and plug the dispenser into the power recep-
tacle.
Check and Top-Off Water Ice Bath:
1. Remove the drip tray and lower splash panel.
2. If the Ice bath level is below the “Full”indicator, top it off with water. Refer to the Filling the Ice Bath
procedure in the Installation section of this manual.

Quest Service Manual
© 2004, IMI Cornelius Inc. - 7 - Publication Number: 720901117SER
ANNUALLY
Replace Pump Tubing:
A replacement pump tubing kit, part#45098,
is available. The kit consists of one pre-cut
length of pump tubing, two white plastic
hose clamps, and instructions.
Removing Pump Platform(s):
1. Remove the concentrate containers
from the dispenser and place them in a
refrigerator.
2. Remove the cabinet shelf that the con-
centrate containers sit on.
3. Flush the system prior to removing the
pump platform (refer to the Daily sec-
tion located at the beginning of the
Planned Maintenance Schedule).
Remove the dispense nozzles and
static mixers.
4. Unplug the water line quick disconnect
by pressing the gray button (see Fig.
1&2).
5. Slide the locking latch forward. Lift the
platform slightly and pull forward to
gain access to the electrical connector
(see Fig.1).
6. Unplug the electrical connector by squeezing the locking tabs on either side and pulling out the con-
nector. Lift and remove the pump platform (see Fig.1).
Replacing Pump Tubing:
1. Remove pump platform (refer to the Removing Pump Platform(s)
procedure located earlier in this section).
2. Remove the two white plastic hose clamps from the pump tube con-
nections (see Fig. 1&2). Remove the concentrate delivery tubes
from the hose ends.
3. Loosen and remove the four screws from the pump body (see fig 3).
4. Remove the rear pump body half only to reveal the pump tube and
rollers.
5. Remove the old pump tube from the pump body. If the roller assem-
bly comes out with the tubing, place it back into the pump housing
being sure to align the roller assembly shaft keyway to the motor
shaft so that the two interlock.
6. Firmly press the new hose into the pump body around the
roller assembly, being sure to keep the protruding ends even
with each other.
7. Once the tubing is in place, hold the tubing with one hand, cap-
ture the lower part of the tubing with the outer housing, then
proceed to capture the shaft of the roller assembly and push
the rear pump housing into place. Make sure to capture the
tubing within the body and not pinch it between the halves. Do
not use any tool other than your finger tips to manipulate the
tubing into the housing or you may damage the tube.
Fig.1
Fig. 2

Quest Service Manual
Publication Number: 720901117SER - 8 - © 2004, IMI Cornelius Inc.
8. While holding the pump halves together with your hand, reinsert
the four screws and tighten using a criss-cross pattern as
shown. The screws should be tightened about 1/4 turn beyond
snug.
9. Insert the two concentrate delivery tubes into the pump tubing
ends and secure them using the new hose clamps supplied in
the kit. Be sure to use pliers to squeeze and tighten the hose
clamps.
Fig. 3

Quest Service Manual
© 2004, IMI Cornelius Inc. - 9 - Publication Number: 720901117SER
TROUBLESHOOTING GUIDE
The following pages contain trouble-shooting information intended to aid an experienced service person
in diagnosing operational problems that may occur. For further assistance, contact the IMI Cornelius
Technical Services department at 1-888-248-5568 (630-539-6850 outside the United States) between
the hours of 7:30A.M. and 5:00P.M. Central Standard Time. You must have the model and serial number
(Located on the right side of the dispenser) prior to calling.
PROBLEM PROBABLE CAUSE REMEDY
Totally Inoperative •No power to dispenser due to
tripped circuit breaker
•Reset circuit breaker. Confirm
that breaker is correct size and no
other equipment is operating on
the same circuit. Also confirm that
supply voltage is +/- 10% of name-
plate specifications.
•Loose or broken power supply
connection inside dispenser.
•Repair connection.
No cooling •Line voltage is not within +/-
10% of nameplate specifications
causing compressor overload to
trip
•Contact an electrician
•No water in water ice bath or
water level extremely low exposing
the ice bank sensing probe
•Fill ice bath to proper water level
•Defective Ice Bank Control or
sensing probe
•Replace
•Cabinet fan is inoperative result-
ing in warm concentrate (water
continues to cool)
•Replace
•Compressor short cycles on
overload
•Excessively high discharge
pressure due to restricted con-
denser or inoperative condenser
fan motor
•Compressor starts but hums
and trips overload
•Seized or shorted compressor,
replace
•Defective compressor overload
or start capacitor
•Test and replace
•Compressor starts but does not
switch off of start winding
•Relay or compressor is defec-
tive. Test and replace faulty item
•Refrigerant leak •Repair leak, evacuate and
recharge system
No water dis-
pensed, concen-
trate only
•No water to dispenser •Restore Water
•Water supply line inside refriger-
ated cabinet disconnected from
pump platform
•Reconnect

Quest Service Manual
Publication Number: 720901117SER - 10 - © 2004, IMI Cornelius Inc.
No water dis-
pensed, concen-
trate only
(continued)
•Water solenoid located on pump
platform clogged or defective
•Disassemble and clean sole-
noid. Replace if necessary.
•Main water solenoid/strainer
located at the rear of dispenser is
clogged, binding or defective
•Remove and clean strainer.
Confirm 28VDC is present at sole-
noid during dispense. Confirm
solenoid coil is not open. Disas-
semble and clean solenoid.
•Water supply pressure is
greater than 80 psi (5.5 bar) forc-
ing the brix flow control closed
•Add external regulator and
lower pressure to 50 psi (3.5 bar)
•Freeze-up of water coil in ice
bath
•Unplug dispenser and allow 2-4
hours to thaw. Check operation of
agitator motor and ice bank con-
trol.
••Refrigeration system may be
low on charge resulting in a
deformed ice bank and freeze-up
of the water coil in the ice bath.
No water and no
concentrate,
refrigeration is
working
•Black service switch located on
the rear of the cabinet door in OFF
position
•Tur n o n switch
•White door switch open •Door switch must be closed in
order to dispense. Check switch
operation and replace if neces-
sary.
•6.25 amp fuse inside front elec-
trical box blown
•Replace with 6.25, 250VAC
slow blow fuse and test
•No output from Transformer •Confirm transformer output by of
26VAC +/- 2. Replace transformer
if necessary.
•Defective voltage regulator
board (VRB) located inside front
electrical box
•Measure across the VDC output
of the board. There should be
28VDC present when the dispense
button is pressed. Replaced VRB if
necessary.
•Defective dispense push button
or portion control board
•Test and replace if necessary
No concentrate
dispensed, water
only
•Concentrate container not fully
engaged into receptacle on pump
platform
•Refer to Concentrate Loading
section of this manual
•Dispense/Flush lever in FLUSH
position
•Move lever to DISPENSE posi-
tion
•Concentrate too cold, not properly
thawed
•Concentrate should be 35-40°F
(1.7-4.5°C) prior to loading
PROBLEM PROBABLE CAUSE REMEDY

Quest Service Manual
© 2004, IMI Cornelius Inc. - 11 - Publication Number: 720901117SER
•Defective pump motor •Replace pump motor
Warm Drink •Ambient air around dispenser is
too warm
•Relocate dispenser
•Excessive demand on dispenser •Add water pre-cooler or second
dispenser
•Dirty condenser coil •Clean condenser coil
•Inoperative condenser fan •Replace condenser fan motor
•Defective Ice Bank Control •Test and replace if necessary
•Loss of refrigerant charge due to
leak in system
•Repair leak and recharge system
Water continu-
ously drips from
nozzle when in
OFF mode
•Main water solenoid at base of
unit or water solenoid on pump
platform not shutting off tightly
•Clean solenoid(s), replace parts
as necessary (refer to the
Planned Maintenance Section)
Concentrate
warm, water cold
•Cabinet fan inoperable •Check/replace fan
•Agitator motor/pump inoperable
or restricted
•Check/replace agitator motor
•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
water pressure fluctuates sharply
•Correct water supply problem to
ensure a constant 50 psi (3.5 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
temperature changes (concen-
trate becomes thinner as temper-
ature rises)
•Concentrate should be 35-40°F
(1.7-4.5°C) prior to loading
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 volt-
age present on primary side. If no
28VAC output from the secondary
replace transformer
PROBLEM PROBABLE CAUSE REMEDY

Quest Service Manual
Publication Number: 720901117SER - 12 - © 2004, IMI Cornelius Inc.
•Defective voltage regulator board
(VRB) located inside front electri-
cal box
•Confirm board produces 28VDC
present when the dispense button
is pressed (refer to the Electrical
Box Wiring Diagram for VDC out-
put location). Replace VRB if nec-
essary
•Defective dispense control board
(Push button or portion control)
•Test and replace if necessary
Machine contin-
ues to dispense
after dispense
button is released
or dispenses with-
out operator input
•Push button or 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 dispense
control board 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 dis-
pense on its own the VRB is
defective (relay stuck on)
PROBLEM PROBABLE CAUSE REMEDY

Quest Service Manual
© 2004, IMI Cornelius Inc. - 13 - Publication Number: 720901117SER
DIAGRAMS
SYSTEM WIRING DIAGRAM

Quest Service Manual
Publication Number: 720901117SER - 14 - © 2004, IMI Cornelius Inc.
MAIN ELECTRICAL BOX WIRING DIAGRAM

Quest Service Manual
© 2004, IMI Cornelius Inc. - 15 - Publication Number: 720901117SER
SPARE PARTS
QUEST SERIES JUICE DISPENSER - 115VAC (BASED ON 10 MACHINES)
Part Number Description Qty
729011132 Kit, Parts - Stocking 1
560004360 Condenser Fan, Motor 115VAC 1
18071 Seat, Armature - Water Valve 2
18367 Spring, Coil S/S - Water Solenoid 2
31314 Fluorescent Bulb 2
45028 Transformer, 115VAC 1
45098 Pump Tubing Kit 4
45432 Inner Door Switch 1
7215323 Armature - Water Solenoid 1
7245699 Flow Control/Bonnet Assembly 2
620710107 Rubber Gasket 2
19695001 Guide, Water Solenoid 1
31525037 O-Ring - Dispensing Nozzle 2
45012102 Voltage Regulator Board 2
45016001 Pump Gear Motor 2
45026100 Bottle Adapter O-Ring Kit (all O-rings in bottle
adapter)
1
45091001 Main Water Solenoid Valve 1
45728001 Pump Rotor Assembly 1
48520001 Coil, 24VDC, Valve Block 1
48979103 Spool & Sleeve Asmb w/ 31525-060 O-Ring 2
59328001 Fuse, 6.25 Amp, 250VAC 4
440000902 Global Ice Bank Control (115VAC) 1
720500014 Drip Tray Grill 1
720500104 Drip Tray 1
720500710 Door Gasket 1
720202009 Catch w/switch 1
720502800 Agitator Motor 1
720503201 Compressor, 115V/60Hz, R-134a 1
720503206 Overload, Compressor, 115VAC 1
720503207 Relay, Compressor, 115VAC 1
720503208 Capacitor, Compressor, 115VAC 1
720506104 Cabinet Fan, 115VAC 2
720507101 Dispense Nozzle, Static Mixer, & O-Ring 1
720508801 Push Button Control Board 1
720508802 Portion Control Board 2
720511606 Ballast Board 1
720703502 Foam Gasket, Lower Door 1
720704001 Latch, Door 1
720501504 Condenser 1
720504904 Frame Assy, Base 1

Quest Service Manual
Publication Number: 720901117SER - 16 - © 2004, IMI Cornelius Inc.
QUEST SERIES JUICE DISPENSER - 230VAC (BASED ON 10 MACHINES)
Part Number Description Q
t
y
729011132 Kit, Parts - Stocking
560004361 Condenser Fan, Motor 230VAC 1
18071 Seat, Armature - Water Valve 2
18367 Spring, Coil S/S - Water Solenoid 2
31314 Fluorescent Bulb 2
720500794 Transformer, 230VAC 1
45098 Pump Tubing Kit 4
45432 Inner Door Switch 1
7215323 Armature - Water Solenoid 1
7245699 Flow Control/Bonnet Assembly 2
620710107 Rubber Gasket 2
19695001 Guide, Water Solenoid 1
31525037 O-Ring - Dispensing Nozzle 2
45012102 Voltage Regulator Board 2
45016001 Pump Gear Motor 2
45026100 Bottle Adapter O-Ring Kit (all O-rings in bottle
adapter)
1
45091001 Main Water Solenoid Valve 1
45728001 Pump Rotor Assembly 1
48520001 Coil, 24VDC, Valve Block 1
48979103 Spool & Sleeve Asmb w/ 31525-060 O-Ring 2
59328001 Fuse, 6.25 Amp, 250VAC 4
440000901 Global Ice Bank Control (230VAC) 1
720500014 Drip Tray Grill 1
720500104 Drip Tray 1
720500710 Door Gasket 1
720202009 Catch w/switch 1
720502803 Agitator Motor 1
720503202 Compressor, 230V/50Hz, R-134a 1
720503209 Overload, Compressor, 230VAC 1
720503210 Relay, Compressor, 230VAC 1
720506104 Cabinet Fan, 230VAC 2
720507101 Dispense Nozzle, Static Mixer, & O-Ring 1
720508801 Push Button Control Board 1
720508802 Portion Control Board 2
720511606 Ballast Board 1
720703502 Foam Gasket, Lower Door 1
720704001 Latch, Door 1
720501504 Condenser 1