Vollrath VBBC1-37-A User manual

SAFETY PRECAUTIONS
The Service Manual provides information about the safety,
operation, and service of the machine and is meant to provide
guidelines for qualified Service Technicians only. This manual
follows guidance from ANSI Z535.6, ASTM F760-93, ASTM
F1827-13, and the FDA Food Code.
DO NOT ATTEMPT to operate the machine until all instruc-
tions and safety precautions are read completely and thor-
oughly understood. Installation and startup of this machine
must be performed by a qualified technician. The warranty
will be void if the machine is not installed correctly. For ques-
tions with installation, operation, or servicing, contact White
Glove Service: 1.800.319.9549.
For complete warranty information, product registration and
new product announcement, visit www.vollrath.com.
© 2021 The Vollrath Company L.L.C. www.vollrathfoodservice.com Part No. L36246 10/12/2021
SERVICE MANUAL
Refrigerated Beverage Dispensers
WARNING
“WARNING” indicates a potential hazard that can or will cause
severe injury or death if not avoided.
CAUTION
“CAUTION” indicates a potential hazard that can cause minor
or major injury if ignored.
“NOTICE” highlights important, nonhazardous information.
To reduce risk of injury or damage to the equipment:
• Plug only into grounded single-phase electrical outlets that
match the voltage on the rating label.
• Do not use extension cords to connect the machine.
• Use this equipment in a flat, level position.
WARNING
Lack of proper electrical grounding according to applicable
codes could result in serious injury or death.
Please refer to the Operator’s Manual for details regarding:
• CLEARANCE AND ENVIRONMENT REQUIREMENTS
• INSTALLATION & FIRST USE
• FEATURES & CONTROLS
• FILL LEVELS
• OPERATION & CLEANING
• DISASSEMBLY & ASSEMBLY
• TROUBLESHOOTING
• MAINTENANCE
Item No.
Bowl
Circulation
Capacity Number of
Gallon (Liter) Bowls
VBBC1-37-A
(8)
2.11
One
Agitator
VBBC2-37-A Two
VBBC3-37-A Three
VBBC4-37-A Four
VBBD1-37-S
(12)
3.17
One
VBBD2-37-S Two
Stirring Paddle
ThreeVBBD3-37-S
VBBD4-37-S Four
VBBE1-37-S
(20)
5.28
One
VBBE2-37-S Two
VBBE3-37-S Three
VBBE4-37-S Four
VBBD1-37-F
Fountain Spray
(12)
3.17
One
VBBD2-37-F Two
ThreeVBBD3-37-F
VBBD4-37-F Four
VBBE1-37-F
(20)
5.28
One
TwoVBBE2-37-F
VBBE3-37-F Three
FourVBBE4-37-F
INSTALLATION
CAUTION
Never grasp the machine by bowls or cylinders. We are not
responsible for damages caused by incorrect handling.
1. Unpack the machine and check for damage.
2. If damage is present, file a claim with the delivering carrier.
3.Ensure the counter will support the machine when filled.
4.Ensure at least 6” airspace around the unit for ventilation.
5.Screw legs tightly into the base of the machine.
6.Before plugging the unit in, ensure voltage is the same as
on the data plate. Plug unit into a grounded, protected, single-
phase electrical supply according to electrical codes and ma-
chine specifications. If you prefer, connect the unit directly to
the mains with the supply cord to a 2-pole wall breaker with a
contact opening of at least 3 mm. Do not use extension cords.
7. Disassemble, clean & sanitize unit before first use!

Refrigerated Beverage Dispensers Service Manual 2
Description Page
Temperature Controls
Temperature Controls���������������������������������������������������������������������������������������������������������������������3
Pumps ��������������������������������������������������������������������������������������������������������������������������������������������4
Impellers�����������������������������������������������������������������������������������������������������������������������������������������4
Magnetic Coupling��������������������������������������������������������������������������������������������������������������������������4
Impeller Troubleshooting ����������������������������������������������������������������������������������������������������������������4
Faucets�������������������������������������������������������������������������������������������������������������������������������������������4
Slow Mixing System �����������������������������������������������������������������������������������������������������������������������5
Refrigerant System Service������������������������������������������������������������������������������������������������������������5
Routine Maintenance����������������������������������������������������������������������������������������������������������������������6
8L Parts Diagram����������������������������������������������������������������������������������������������������������������������������7
8L Service Parts List�����������������������������������������������������������������������������������������������������������������������8
8L Wiring Diagram��������������������������������������������������������������������������������������������������������������������������8
12L & 20L Fountain Parts Diagram ������������������������������������������������������������������������������������������������9
12L & 20L Fountain Service Parts List �����������������������������������������������������������������������������������������10
12L & 20L Fountain Wiring Diagram���������������������������������������������������������������������������������������������10
12L & 20L Stir Parts Diagram�������������������������������������������������������������������������������������������������������11
12L & 20L Stir Service Parts List��������������������������������������������������������������������������������������������������12
12L & 20L Stir Wiring Diagram �����������������������������������������������������������������������������������������������������12
TABLE OF CONTENTS

3 Refrigerated Beverage Dispensers Service Manual
TEMPERATURE CONTROLS
All units are equipped with adjustable thermostats, located behind
the panel under each bowl.
Temperature Control Location
It is possible to adjust temperature between 6 °C and 12 °C.
Temperature for new machines is factory preset to about 8°C.
To adjust temperature:
• Decrease — rotate the setting screw clockwise.
• Increase — rotate the setting screw counterclockwise
Adjusting Temperature
NOTICE
Rotating the thermostat setting screw completely counterclock-
wise will turn o the thermostat for that bowl. To stop refrigeration
completely, screws under each bowl must be fully rotated to the o
position. To adjust temperature on multiple-bowl models, thermostats
must be turned to the same setting.
NOTICE
On multiple bowls units, thermostats are electrically wired in paral-
lel and directly drive the compressor. All bowls must reach the set
temperature to stop refrigeration (all thermostats must be electrically
open). To start refrigeration, only one thermostat must have a tem-
perature higher than the setting (be electrically closed).
PUMPS
12L & 20L models are equipped with spray pumps. Each pump is
magnetically driven by an independent electric motor.
These machines are equipped with one Main Switch to power ON
and OFF refrigeration and with one Pump Switch for each bowl (see
Operator's Manual for details).
Spray pumps are suitable for a large variety of products but it is
better not to spray coee, tea, natural juices, or other beverages
that can foam. To avoid spray on these machines, it is necessary
to replace the original impeller with grey impeller pn 33900-01201
— and to remove the spray tube from the bowl.
8L models are equipped with submerged pumps. On double ma-
chines, pumps are driven by one motor with a transmission belt and
three pulleys. This motor also works as a fan. On triple machines,
two pumps are driven by one motor with the same system of double
units and the third driven by a single motor. On four-bowl machines,
pumps are driven by two motors.
These machines are equipped with one Main Switch to power ON
and OFF all functions, refrigeration, and pumps.
Submerged pumps are suitable for almost all kind of beverages
— particularly coee, tea, natural juices, or other beverages that
can foam. The following table summarizes available impellers:
NUMBER
PART COLOUR BOWLS
CAPACITY
[litres]
MIXING
SYSTEM
33900-01201 GREY 8, 12, 20 SUBMERGED
33900-01204 BLUE 12, 20 SPRAY
SPRAY

Refrigerated Beverage Dispensers Service Manual 4
PUMPS (Continued)
Available Bowls:
PART MIXING
BOWLS
NUMBER CAPACITY SYSTEM
[litres]
822900-02010 SUBMERGED
1222900-00000 SPRAY
2022900-04800 SPRAY
Available Spray Tubes:
PART
NUMBER
BOWLS
CAPACITY
[litres]
22900-00201 12
22900-00200 20
Configurations can be customized.
IMPELLERS
To maintain ecient mixing and cooling — clean sugar, pulp, and
other substances from the impeller and pivot so the impeller spins
freely. If necessary, apply food-grade lubricant.
A self-lubricating washer is moulded into the bottom of the impel-
ler. Regularly check the washer and replace the impeller if neces-
sary.
MAGNETIC COUPLING
Impellers are magnetically coupled with their respective motors. The
magnetic gap is factory preset and does not require adjustment. If
magnetic lock is lost, check for a bent pump motor bracket or an
impeded impeller due to damaged or dirty parts.
IMPELLER TROUBLESHOOTING
If impellers are noisy, power the unit o and remove them from
the pivots. Power the unit on; if the noise persists, power the unit
o, unplug it, and remove the panels to check pump motors as-
semblies. Noise can occur due to: faulty electric motor, improper
magnetic alignment due to a bent bracket, a fan blade hitting an
obstacle, or a loose part.
On 8L multiple-bowl models, power the unit o and remove the
transmission belt from the pulleys. Power the unit on; if the noise
persists, the cause could be the electric motor.
If there is no noise, remove magnetic pulley assemblies and check
the integrity of their ball bearings. If necessary, replace the entire
magnetic pulley assembly.
If the noise does not persist after removing impellers, the cause
could be the impeller or magnetic coupling. Check for worn
impellers; replace if necessary. Clean impellers and pivots and lubri-
cate them with food-grade lubricant if necessary. Install the impellers
and put some water into the bowls. If the noise persists, check the
pump motor bracket alignment.
NOTICE
Impellers are designed to spin when submerged and wet. To prevent
damage, do not allow them to spin when dry. Always switch o 12L
& 20L pumps and remove impellers in 8L models or refill them with
water when bowls are empty.
FAUCET
STAINLESS STEEL GRAVITY FAUCET
This faucet is suitable for liquid product without pulp or solid particles.
In case of dripping, drain the product out of the bowl, remove the
stainless steel piston, clean it with fresh water and check for wear
on the rubber gasket — if necessary, replace. Also clean the piston
housing in the bottom of the bowl and check for the integrity of the
rim around the piston hole.

5 Refrigerated Beverage Dispensers Service Manual
SLOW MIXING SYSTEM
The mechanical drive slow mixer (B) is suitable for thin or thick drinks.
If the mechanical slow mixer is not properly rotating, check for a
faulty drive motor or excessive beverage thickness.
REFRIGERANT SYSTEM SERVICE
CHECKING FOR REFRIGERANT LEAKS
Carefully follow steps 1-7 below to inspect the entire system.
NOTICE
When using a refrigerant detector, follow along the bottom side of
the copper tubing since refrigerant gas is heavier than air. Where
copper tubing is protected by an insulating jacket, check for leaks
at both ends of each jacket section.
1. Check high-pressure compressor line soldered connection
2. Follow copper tubing and check soldered connections at
top and bottom of condenser.
3. Check along the copper curves on both sides of condenser.
4. Follow copper tubing and check soldered connections of
dryer at evaporators.
5. Remove mixer motors & check inlet (capillary) & outlet
(suction) tubing.
6. Check copper tubing all the way back to the compressor.
7. Check low side connections at compressor suction &
process tubes.
CAUTION
To check for a leak in the low side of the system, it is advisable to
have evaporators at or below ambient temperature.
If a leak has been detected, seal it and make a new refrigerant charge
per the following instructions.
WARNING
Refrigerant gas could be highly acidic and toxic.
DISCHARGING
1. Remove dispenser panels.
2. If not present, install a charging valve on the compressor
process tube.
3. Remove the screw cap from the compressor process tube.
4. Connect the process tube to the LOW part of the gauge set.
5. Connect the VAC port of the gauge set to an adequately
approved gas recovery system.
6. Open the LOW and VAC valves and recover the refrigerant.
7. Once recovery is complete, close the LOW and VAC valves
and disconnect the recovery system.
EVACUATING
NOTICE
Always install a new liquid line filter dryer before evacuating.
1. Connect the REF port of the gauge set to the charging unit.
2. Connect the VAC port of the gauge set to the vacuum pump
and open the VAC valve.
3. Open the line valve of the charging unit and for a while, the
REF valve to purge air from the REF hose.
4. Open the LOW valve of the gauge set and turn on the
vacuum pump for a minimum of 30 minutes.
5. While the pump is running, close the VAC valve once
a vacuum has been established.
6. Turn o the vacuum pump.
Figure 8 — Gauge Valves & Ports
REFRIGERANT SYSTEM SERVICE (Continued)

Refrigerated Beverage Dispensers Service Manual 6
REFRIGERANT SYSTEM SERVICE (Continued)
CHARGING
The gauge set is usually four ports and four valves (see figure 8).
This is the easiest option because it allows the charging through
both low and high sides of the system. Our refrigeration systems
are manufactured to be chargeable through the compressor
process tube only (low side): thus, the HI port is never mentioned
nor used in the following procedure and the HI valve must be
kept closed.
1. Determine the ounces/grams that should be filled by the
charging unit by checking the dispenser data plate.
2. Remove bowls and mixers from the dispenser.
3. Plug in the dispenser and turn on the power switch.
4. Open the line valve of the charging unit.
5. Open the REF valve very slowly to allow refrigerant to be
pulled into the system as a gas.
6. When the amount of refrigerant listed on the data plate
has been used, the system is charged. Close the REF valve
and charging unit line valve and allow the compressor to
run a few minutes.
7. Ensure that all evaporator plates are covered with frost.
8. Close the LOW valve, disconnect the LOW hose from the
compressor process tube and tighten the screw cap.
Suction and discharge pressures of machines with dierent refrig-
erants are listed below. They must be verified with:
Ambient temperature: 32 °C
Product temperature in the bowls: 5 °C
Evaporation temperature approximately -5 °C
Condensation temperature approximately 50°C.
Refrigerant
pressure
Suction (low)
Discharge (high)
pressure
R134a 1,43 bar 12,17 bar
R223,20 bar 18,39 bar
R404a 4,10 bar 21,93 bar
COMPRESSOR BURN-OUT
To determine if a burn-out has occurred, perform the following:
1. Disconnect the unit from power source.
2. Remove wiring from compressor terminals.
3. Using an ohmmeter, check for ground between terminals
and compressor housing. If a reading exists, the compressor
has shorted to the ground and must be replaced.
COMPRESSOR REPLACEMENT
4. Recover refrigerant using an approved refrigeration
recovery system per DISCHARGING instructions.
5. Remove the burned-out compressor.
6. Correct the system fault which caused the burn-out. Check
the condition of the capacitor(s) and compressor relay.
7. Install a new compressor and liquid line filter dryer.
8. Evacuate and charge the system per EVACUATING and
CHARGING instructions.
ROUTINE MAINTENANCE
DAILY
Inspect the machine for signs of leaks, worn seals and gaskets.
If proper assembly does not stop leaks around seals or gaskets,
check for improper lubrication, and worn or damaged parts. Re-
place parts as needed with parts from the supplier.
WEEKLY
Clean and sanitize the machine following procedures in the Op-
erator's Manual. Check for worn impellers, bowl gaskets, faucet
pinch tubes, or stainless steel piston gaskets. Replace parts as
needed with parts from the supplier.
MONTHLY
Clean all internal components, primarily the condenser, using
compressed air, vacuum, or a soft brush. To clean internal parts,
unplug the unit and remove the panels.
WARNING
Hazardous voltage
The machine must be disconnected from the
electrical supply before servicing. Failure to
disconnect power before servicing could result
in death or serious injury.
WARNING
Condenser Fins are Extremely Sharp! Use ex-
treme caution when cleaning.
On 12L & 20L dispensers, the condenser is on the back of the
unit and air flow is from back to sides (A). To clean the condenser,
disconnect the power and remove the back panel.
On 8L dispensers, the condenser is also on the back of the unit,
but air flow if from sides to back (B). To clean the condenser,
disconnect the power and remove the faucet side panel to clean it
from the inside.

7 Refrigerated Beverage Dispensers Service Manual
8L Model

Refrigerated Beverage Dispensers Service Manual 8
8L Model Service Parts & Wiring Diagram
1
2Thermostat
Switch
Pump/mixer3-5
4Compresso
r
1
4/5-8
2-3
Switch
Thermostat
Pump/mixer4-6
5Compresso
r
8L Service Parts
Item P/N Description Item P/N Description
4 22800-21903 Spigot piston 36 22800-04800 Motor bracket
5 10028-02503 Spigot gasket 37 22800-18981 Fan/pump motor — 1 bowl
7 22900-02010 Bowl — VBBC (8L) 37A 22900-03011 Fan/pump motor — 2 & 4 bowl
11 10029-00060-465 Spigot handle insert — upper 38 22900-00403 Fan blade — 1 bowl
12 22900-00560-469 Spigot handle 22900-00401 Fan blade — 2, 3 & 4 bowl
16 22900-01300 Bowl cover 39 BR0354 Relay
21 22800-17200 Bowl gasket 40 BR0355 Motor protector
22 33900-01201 Impeller — bottom of bowl 41 22800-12700 Terminal block cover
23 22900-00600 Impellor pivot — bottom of bowl 42 BR0059 Cable clamp
24 22040-00000 O-ring — Impeller pivot 43 BR0057 Foot — leveling
27 21087-00001 Thermostat 44 22900-03170 Panel, front — 1 bowl
29 10554-45000 Clip 22900-03171 Panel, front — 2 bowl
30 22900-03210 Cabinet — 1 bowl 22900-03172 Panel, front — 3 bowl
22900-03211 Cabinet — 2 bowl 22900-03173 Panel, front — 4 bowl
22900-03212 Cabinet — 3 bowl 45 22800-00501 Drip tray cover — 1 bowl
22900-03213 Cabinet — 4 bowl 46 22800-00601 Drip tray — 1 bowl
31 21125-00000 Switch 47 33800-00803 Motor magnet for 1 & 3 bowl
32 33900-01052 Pulley, magnet & spacer assembly 48 22800-04800 Motor bracket
33 22800-05100 Switch cap 49 22800-04706 Motor fountain & fan — 3 bowls
34 22900-03602 Belt 69 33800-06701 Motor — stirrer (115V, 60HZ)
35 22800-02201 Pulley — Drive

9 Refrigerated Beverage Dispensers Service Manual
12L & 20L Model Fountain

Refrigerated Beverage Dispensers Service Manual 10
12L & 20L Model Service Parts & Wiring Diagram
1
1/12-20 - 2/12-20 - 3/12-20
2-3-4
Switch
Thermostat
Pump/mixer5-7
6
4/12-20
Compressor
1-2Switch
3-4-5-6Thermostat
Pump/mixer7-9
8-10 Compressor
12 & 20L Service Parts — Fountain
Item P/N Description Item P/N Description
1 22900-00100 20L bowl cover 28 22900-00403 Fan blade — 2,3, & 4 bowl
2 22900-00100 12L bowl cover 29 BR0354 Relay
6 22800-17200 Bowl gasket 30 BR0351 Motor protector — Embraco
8 22900-00760 Plastic I-beam for connection 31 22800-12700 Terminal block cover
9 22900-00600 Impellor pivot — bottom of bowl 32 BR0059 Motor magnet — 1 & 3 bowl
10 22040-00000 O-ring — Impeller pivot 33 33800-00803 Motor protector
11 BRO348 Capacitor 34 22800-04800 Motor bracket
12 10554-45000 Clip 36 22900-03210 Cabinet — 1 bowl
13 22800-21900 Faucet piston 22900-03211 Cabinet — 2 bowl
14 10028-02500 Faucet gasket 22900-03212 Cabinet — 3 bowl
16 10029-00060 Spigot handle insert — upper (Vollrath) 22900-03213 Cabinet — 4 bowl
17 22900-00560 Spigot handle 37 22800-10000 Foot leveling
20 21087-00001 Thermostat 38 22900-03171 Front panel — 2 bowl
21 21125-00000 Switch 39 22800-00501 Drip tray cover — 1 bowl
22 22800-05100 Switch cap 40 22800-00601 Drip tray — 1 bowl
23 33900-01052 Pulley, magnet & spacer assembly 41 22900-00200 Spray tube 20L (fountain)
24 22900-03602 Belt 42 22900-04800 Bowl — 20L (fountain)
25 22800-02201 Pulley — drive 43 22900-00201 Spray Tube — 12L (fountain)
26 22800-04800 Motor bracket 44 22900-00000 Bowl — 12L (fountain)
27 22800-18981 Fan/pump motor — 1 bowl 45 33900-01204 Impeller 60Hz
27A 22900-03011 Fan/pump motor — 2, 3 & 4 bowl

11 Refrigerated Beverage Dispensers Service Manual
12L & 20L Model — Stir

Refrigerated Beverage Dispensers Service Manual 12
12L & 20L Model Stir Service Parts & Wiring Diagram
1-2
3-4-5-6
7-8-9-10
11-12-13-14
15-16
17-18
19-20
21-22-23-24
Switch
Thermostat
Pump/mixer switch
Pump/mixer
Fan Motor
Compressor
Transformer
Top light
Item P/N Description Item P/N Description
1 22900-00100 20L bowl cover 27 22800-06860 Rear panel 1 bowl
2 22900-00100 12L bowl cover 22900-02370 Rear panel 2 bowl
3 22900-0200
Sray tube —20L (fountain) 22900-02380 Rear panel 3 bowl
4 22900-04800 Bowl 20L (fountain) 22900-02390 Rear panel 4 bowl
5 22900-00201 Spray tube 12L (fountain) 28 10502-55010 Panel screw
6 22900-00000 Bowl 12L (fountain) 29 22800-00501 Drip tray cover 1 bowl
7 33900-01204 Impeller 60Hz 29A 22800-00562 Drip tray cover 2, 3 & 4 bowl
8 22800-17200 Bowl gasket 30 22800-00661 Drip tray 1 bowl
9 22900-00600 Impellor pivot bottom of bowl 30A 22800-00662-465 Drip tray 2, 3 & 4 bowl
10 22040-00000 O-ring Impeller pivot 39 22900-05600 Drive shaft 12L (stir)
11 21125-00000 Switch 22800-14701 Drive shaft 20L (stir)
12 22800-05100 Switch cap 40 22900-05400 Agitator 12L (stir)
13 21087-00000 Thermostat 22900-05401 Agitator 20L (stir)
14 33800-00803 Motor magnet 41 22900-05500 Central shaft 12L
15 22800-04800 Motor bracket 22900-05501 Central shaft 20lt
16 22800-04706
Motor fountain (12L & 20L all bowls)
Fan (12L 2-4 blowls)
42 22900-05710 Central shaft gasket
17 22900-02370 Panel rear 2 bowl 43 22900-05700 O-ring central shaft, below seal (stir)
22900-02380 Panel rear 3 bowl 44 10533-01303 Central shaft brass nut (stir)
22900-02390 Panel rear 4 bowl 45 22900-04820 Bowl 20L (stir)
18 22800-00360 Left side panel (all bowls) 47 22900-00020 Bowl 12L (stir)
18A 22800-00260 Right side panel (all bowls) 48 22800-21903 Spigot piston
19 22800-12700 Terminal block cover 49 10028-02503 Spigot gasket
20 BR0059 Cable clamp 50 10029-00060-465 Spigot handle insert upper (Vollrath)
22 BR0354 Relay 1,2 & 4 bowl (3 bowl BR0350)51 22900-00560-469 Spigot handle
23 22800-04706
Motor fountain (12L & 20L, all bowls)
Fan (12L, 2-4 bowls)
55 22900-00760 Plastic I-beam for connection
23B 33800-06901 Fan motor for 1 bowl 60 22900-05800 Bolt, central shaft (stir)
24 21907-00000 Fan for 12L 62 33800-06701 Motor 115V, 60Hz (stir)
25 10554-45001 Panel Clip 64 100028-02503 Spigot Gasket
26 22800-10000 Foot leveling 67 33800-06701 Motor 115V, 60Hz (stir)
71 22800-18203 Transformer
12L & 20L Serivce Parts (Stir)

13 Refrigerated Beverage Dispensers Service Manual
PROBLEM POSSIBLE CAUSES REMEDY
Machine does not work. Neither pump
motors, fan motor, nor compressor are
running.
There is an improper/faulty electrical
connection.
The main switch is defective.
Locate and correct the problem.
Replace main switch.
There is no refrigeration. Pump motors &
fan motor run, but compressor does not.
Machine protector or compressor relay
is defective.
Compressor cycles on motor protector.
Thermostat is defective (always open).
Replace motor protector.
Check the power line for low voltage,
then check the starting relay and motor
protector; replace if necessary.
Replace the thermostat.
Refrigeration is not detectable or poor. There is not enough air flow/ventilation.
Condenser is clogged with dust.
Fan motor is defective.
Refrigerant gas charge is low.
Provide at least 6" (15cm) of clear air-
space around the unit.
Clean condenser using compressed air,
vacuum or a soft brush.
WARNING
Condenser fins are very sharp, use
extreme caution!
Check for obstacles to fan blade rota-
tion. If necessary replace fan motor.
Detect possible leak, seal it and
There is excessive refrigeration; the
compressor does not stop.
Temperature is not adjusted properly.
Thermostat is defective (always closed).
Thermostat temperature probe is out-
side of its housing.
Adjust the temperature setting.
Replace the thermostat.
Insert thermostat temperature probes
into their housing.
There is no pumping or agitation; pump
motor runs.
Pump impeller does not spin at all.
Pump impeller does not spin freely.
Magnetic lock decoupled (is chattering).
Clean impeller and pivot well; if neces-
sary, lubricate with food-grade product.
Check impeller; replace if necessary.
Verify alignment of pump motor bracket.
There is no pumping or agitation; pump
motor does not run.
There is an improper or faulty electrical
connection.
Pump switch is defective.
Pump motor is defective.
Drive magnet binds on evaporator as-
sembly.
Transmission belt is broken (compact
series with multiple bowls only).
Locate and correct the problem.
Replace pump switch.
Replace pump motor.
Verify alignment of pump motor bracket.
Replace transmission belt.
Gravity/stainless steel faucet is dripping. Stainless steel gravity gasket is nicked
or incorrect.
Faucet is not fully in a closed position.
Faucet rim in bowl is damaged.
Replace steel gasket.
Check that stainless steel is moving
freely; thoroughly clean if necessary.
Replace the bowl.

© 2021 The Vollrath Company L.L.C.
1236 N 18th St, Sheboygan WI 53081
www.vollrath.com 1.800.624.2051
Part No. L36246
Every machine includes White Glove
Service for all your service, technical,
warranty & installation needs.
1.800.319.9549 (U.S. Toll Free)
920.894.2293 (Outside the U.S.)
14
PROBLEM POSSIBLE CAUSES REMEDY
Unit is noisy. Impellers are worn.
Fan blade is bent.
Fan or pump motor is noisy.
Magnetic lock decoupled (is chattering).
Ball bearings are noisy (on compact,
multiple bowl series)
Replace impellers.
Bend fan blade to correct alignment.
Replace motor.
Check alignment of pump motor
bracket.
Replace magnetic pulley assembly.
Magnetic slow mixer is not rotating. Drive motor is defective.
Magnetic mixer does not rotate freely.
There is ice on the evaporator.
Replace drive motor.
Clean mixer and pivot thoroughly;
lubricate with food-grade lubricant if
necessary.
Increase product level in the bowl.
Adjust temperature setting.
Check thermostats.
Mechanical slow mixer is not rotating. Drive motor is defective.
Product is excessively thick.
Replace drive motor.
Add drinking water or product that is
less viscous/thinner.
WARNING
Condenser fins are very sharp, use
extreme caution!