Follett U155B Manual

Manual load unit
Model U155, U155X
Model U155B, U155BX Model U155R400A/W, U155XR400A/W Model U155BR400A/W, U155BXR400A/W
Model U155R800A/W, U155XR800A/W
Model U155BR800A/W, U155BXR800A/W
Automatic load unit
with one icemaker
Automatic load unit
with two icemakers
Installation, Operation and Service Manual
U155 Series
Ice and Beverage Dispensers
208598R05
801 Church Lane • PO Box D, Easton, PA 18044, USA
Toll free [phone] • (888) 2-FOLLETT
[phone] • Fax [phone] • www.follettice.com
UL
®
Following installation, please forward this manual
to the appropriate operations person.
UL
®
C
Order parts online
www.follettice.com

Welcome to Follett Corporation
Important cautions
Specifications
Installation
Installing dispenser in counter
Electrical connections
Field wiring diagrams
Connecting beverage lines
Installing optional icemaker
Operation
How the dispenser works
Cleaning
Service
Dispense chute cover removal
Auger motor assembly removal
Gate assembly removal
Auger and auger tube removal
Dispenser wheel removal
Wiring diagrams
Troubleshooting
Replacement parts
3
Table of contents
4
4
5
7
7
8
8
9
9
10
10
11
13
13
13
13
13
13
14
15
17
Follett Corporation
Equipment Return Policy
Follett equipment may be returned for credit under the following conditions:
1. The equipment is new and unused.
2. A return authorization number has been issued by customer service.
3. Follett receives the equipment at the factory in Easton, PA within 30 days of the issue of the return authorization number.
4. The equipment must be returned in Follett packaging. If the packaging has been damaged or discarded, Follett will forward, at the customer’s
expense, new packaging.
Note: Return freight charges are the responsibility of the customer. If equipment is returned and is damaged because of improper packaging,
Follett Corporation will not be held responsible.
Credit will be issued when:
The equipment has been inspected by Follett and deemed suitable to be returned to stock.
Note: A 15% restocking charge will be deducted from the credit. If the cost to return the product to stock exceeds 15%, the actual cost will be
deducted.

Welcome to Follett
Follett ice dispensers enjoy a well-deserved reputation for excellent performance, long-term reliability and
outstanding after-the-sale support. To ensure that this dispenser delivers that same degree of service, we ask
that you take a moment to review this manual before beginning the installation of the dispenser. Should you have
any questions or require technical help at any point, please call our technical service group at [phone] or
(888) 2-FOLLETT or [phone].
Before you begin
After uncrating and removing all packing material, inspect the equipment for concealed shipping damage. If
damage is found, notify the shipper immediately and contact Follett Corporation so that we can help in the filing of
a claim, if necessary.
Check your paperwork to determine which model you have. Follett model numbers are designed to provide
information about the type and capacity of Follett ice dispensing equipment. Following is an explanation of the
different model numbers in the U155 series.
Important cautions
Storage area of dispenser contains mechanical, moving parts. Keep hands and arms clear of
this area at all times. If access to this area is required, power to unit must be
disconnected first.
Ice is slippery. Maintain counters and floors around dispenser in a clean and ice-free condition.
Ice is food. Follow recommended cleaning instructions to maintain cleanliness of delivered ice.
Always disconnect power before cleaning or servicing the dispenser.
Failure to remove all sanitizer may result in health hazard.
Follett manual load dispensers can accommodate most cube/cubelet ices up to 1" square, or Follett
compressed nugget ice. Crushed, flake, bagged, nugget or congealed ice cannot be used. Use of
these ices can jam dispenser and void warranty. Separate any “waffle-like” sections of cubes before
adding to dispenser. For ice compatibility questions, please call Follett customer service at
[phone] or (888) 2-FOLLETT or [phone].
!
4
Condenser type – A = air-cooled, W = water-cooled
Remote icemaker(s) capacity and refrigerant – 400 = 400 lbs (181kg)/day, R404A
800 = 800 lbs (363kg)/day, R404A
absence of = manual fill unit
B = beverage bath equipped. Absence of a B = no integral beverage cooling
Approximate manual load storage capacity in lbs
Dispenser configuration – U = undercounter
Presence of an X = 10 soda valves
Ice dispense chute location – R = right side, L = left side
U155BR400AXR

Specifications
Electrical
Each icemaker and dispenser require a separate circuit with with electrical disconnect within 10 ft (6m).
Equipment ground required. Standard electrical – 115V, 60Hz, 1 phase. Maximum dispenser fuse – 15 amps,
Maximum icemaker fuse – 20 amps each.
Model Icemaker Dispenser
number amperage amperage
Single-sided models
U155, U155X 2.4 amps
U155B, U155BX 4.4 amps
U155R400A/W, U155R400A/WX 11.0 amps 2.4 amps
U155BR400A/W, U155BR400A/WX 11.0 amps 4.4 amps
U155R800A/W, U155R800A/WX 11.0 amps ea (2) 2.4 amps
U155BR800A/W, U155BR800A/WX 11.0 amps ea (2) 4.4 amps
Plumbing
Dispenser 3/4" PVC pipe nipple for bin drain
3/4" PVC pipe nipple for drain pan drain
1" ID hose for beverage bath drain
Beverage connections
1/4" ID syrup beverage hose
3/8" ID carbonated water beverage hose
3/8" ID plain water beverage hose
Note: Drains should be hard piped and insulated. Maintain at least 1/4" per foot (6mm per 304mm run)
slope on drain line run.
Water disconnect within 10 feet (3m) of dispenser is suggested for automatic load units.
Follett recommends use of a Follett model AFSYSTMFL4S water filter on icemakers connected
to automatic fill dispensers.
Icemaker (detailed specifications may be found in icemaker installation manual
packed with icemaker)
3/8" OD push-in water in
3/4" MPT drain
3/8" FPT condenser inlet (water-cooled condenser only)
1/2" FPT condenser drain (water-cooled condenser only)
5

Dimensions and clearances
Required clearances
51" (1295mm) minimum above counter for installation if dispenser will be dropped into counter
36" (915mm) minimum above counter for all units after installation for auger cleaning and servicing
12" (305mm) minimum on side opposite ice chute for service
12" (305mm) minimum on ice chute side if ice transport tube enters this side
12" (305mm) minimum between dispenser side(s) and optional icemaker(s)
6
*DO NOT
CONNECT TO
DRAIN SYSTEM
6"
min
27.375"
(696mm)
ice transport
SideView
FrontView
tube entrance
6"
(153mm)
25.8"
(656mm)
bin
signal
power
8.75"
(223mm)
3/4 PVC
slip joint
drain
3/4 PVC slip
joint drain
18.5"
(470mm)
beverage
waterbath
overflow
beverage
drain pan
drain
3.5"
(889mm)
37.25"
17"
(432 mm)
18.875"
(479mm)
18.875"
(479mm)
beverage line
air break*
electrical
connections
31.25"
(794mm)
21.75"
(553mm)
28"
(712mm)
counter top
ice
transport
tube
49.75"
(1264mm)
(8 valve unit)
(10 valve unit)
(947mm)
Manual load unit
Automatic load unit with 1 icemaker
Automatic load unit with 2 icemakers
12"
min

Installation
Installing dispenser in counter
Note: All dispensers must be supported from below with supplied 6" - 9" (153 – 229mm) adjustable leg accessory,
or equivalent. Do not hang dispenser on flange.
All dispensers must be installed level in both directions to ensure proper operation.
1. Check that dispenser location meets all requirements in this manual and cut counter as shown.
2. Place support blocks in cabinet to raise dispenser to a height of 12" (305mm)
3. Place dispenser in counter onto support blocks.
4. Attach adjustable legs to dispenser.
5. Remove support blocks and lower dispenser feet to floor.
6. Adjust legs for 1/8" (4mm) clearance between dispenser lip and countertop to verify there is no load on flange.
7. Apply a bead approximately 1/4" (6mm) in diameter of NSF-listed silicone sealant (Dow Corning RTV-732 or
equivalent) around perimeter of dispenser where it meets counter. Smooth sealant to a 1/8" (4mm) radius.
8. Install a PVC drain line with at least a 1/4" per foot (20mm per 1m) slope. Insulate drain line to prevent
condensation.
Note: Do not apply excessive heat if any sweating of fittings is necessary. Heat conduction through metal may
melt threads in plastic drain.
Do not reduce drain line size or tie drains together.
9. Make electrical connections in accordance with applicable wiring diagrams provided. Provide disconnects within
10 ft (3m) of dispenser and icemaker for servicing.
Front of counter
+.125"
- .125"
30.375"
(772mm) +3 mm
- 3 mm
26.25"
Front of counter
+.125"
- .125" +.125"
- .125"
36.375"
(924mm) +3 mm
- 3 mm
(667mm)
+3 mm
- 3 mm
26.25"
+.125"
- .125"
(667mm)
+3 mm
- 3 mm
Plan View
units with up to 8 valves
counter cut-out
7
Plan View
units with 10 valves
counter cut-out

Electrical connections
Model
U155, U155X,
U155B, U155BX
U155R400A/W,
U155R400A/WX,
U155BR400A/W,
U155BR400A/WX
U155R800A/W,
U155R800A/WX,
U155BR800A/W,
U155BR800A/WX
Electrical connection
Hard wiring of dispenser required
Dispenser power – hard wiring
required
Bin signal – cord and plug supplied
Icemaker – cord and plug supplied
on power and bin signal
Dispenser power – hard wiring
required
Bin signal – cord and plug supplied
Icemaker – cord and plug supplied on
power and bin signal
Circuit(s) required
115V, 60Hz, 1 phase
Max. fuse dispenser – 15 amps
115V, 60Hz, 1 phase
(2) circuits required
Dispenser – 15 amps max. fuse size
Icemaker – 20 amps max. fuse size
115V, 60Hz, 1 phase
(3) circuits required
Dispenser – 15 amps max. fuse size.
(2) icemakers – 20 amps max. fuse
size each
Field wiring diagrams
Note: Field wiring diagrams are intended to aid electricians or technicians in understanding how equipment
works. All field wiring must be installed in accordance with all local and NEC codes.
LEGEND
WIRENUT FIELD
CONNECTIONS
XEQUIPMENT
GROUND
B
W
GRN
BL
Y
Manual load models
X
Electric Power
Source
B
W
GND
GRN
GND
GRN
B
W
LEFT JUNCTION BOX
15 AMP FUSED
DISCONNECT RIGHT JUNCTION BOX
NOT
USED
DISPENSER
DISPENSER
Automatic load models
LEFT JUNCTION BOX
GND
GRN
B
W
RIGHT JUNCTION BOX
BL
Y
RD
BL
Y
RD
W
B
LOWER JUNCTION BOX
ICEMAKER #2
(OPTIONAL)
X
Electric Power
Source
B
W
GND
GRN
15 AMP FUSED
DISCONNECT
W
B
X
GND GRN
B
W
LOWER JUNCTION BOX
ICEMAKER #1
(OPTIONAL)
UPPER JUNCTION BOX
BLACK
WHITE
GREEN
BLUE
YELLOW
RD RED
ELECTRIC
POWER
SOURCE
X
GND GRN
B
W
UPPER JUNCTION BOX
ELECTRIC
POWER
SOURCE
8

Connecting beverage lines
1. Connect syrup and water lines. Non-carbonated water line will be labeled “water”. Syrup lines are numbered
and correspond to the valves as shown in drawing(s) below. Valve one is always next to ice tower.
2. Clean and sanitize beverage lines in accordance with cleaning instructions.
1
2
34
56
7
8910
Installing optional icemaker
Correct installation of remote icemaker(s) is critical to proper performance of icemaker. Refer to installation
manual packed with icemaker for important details on ice transport tube run, ventilation requirements and other
installation requirements. Failure to comply with instructions may void warranty.
To start up and operate dispenser
1. Follow detailed cleaning instructions in service manual before operating dispenser.
2. On units with Follett integral ice water bath beverage cooling (“B” models) only, slowly pour water into ice
water bath area to fill empty bath and submerge coils. Coils are submerged when water starts to flow out
overflow drain. DO NOT SPLASH WATER ON ELECTRICAL BOX. Once filled with water, add ice to bath
until ice covers top of waterbath.
3. For manual load units, remove front drain pan or rear lid and fill storage area with approved ice.
Note: Follett manual load dispensers can accommodate most cube/cubelet ices up to 1" square, or Follett
compressed nugget ice. Crushed, flake, bagged, nugget or congealed ice cannot be used. Use of these
ices can jam dispenser and void warranty. Separate any “waffle-like” sections of cubes before adding to
dispenser. For ice compatibility questions, please call Follett customer service at [phone]
or (888) 2-FOLLETT or [phone].
4. Turn power switch located on dispenser control box to ON position.
5. For automatic fill units, follow detailed instructions in icemaker installation section of installation manual, then
turn icemaker (bin signal) switch(es) located on dispenser control box to ON position and begin to make ice.
6. When dispenser has at least 6" (153mm) of ice in storage area, test operation.
9
Valve position #1 is always next to ice
tower. Right-hand unit shown.

Operation
How the dispenser works
Follett’s dispensers are available in automatic load configurations, fed from one or two Follett remote icemakers
or manual load configurations (using ice from another source).
In all models, ice is stored below the counter in the dispenser storage area. When the dispense lever or button is
pushed, the dispense motors are activated. This causes the wheel assembly in the storage area to turn, moving
ice to the vertical auger assembly, which carries ice up to the dispense chute where it drops by gravity into the
container.
In automatic load units, ice is manufactured in either one or two Follett remote icemakers. These icemakers may
be located up to 20 ft (6m) away from the dispenser. Extruded ice is transported through a tube and pushed to
the storage compartment of the dispenser. When the bin is filled, a bin thermostat shuts the icemaker off to avoid
overfilling of the bin. The icemaker will restart after 20 minutes if the bin is calling for ice.
Units with integral ice water bath beverage cooling are equipped with a waterbath timer circuit that activates the
waterbath pump for 35 minutes when ice lever or button is activated, or when the ice water bath warms up and
calls for more ice.
Ice movement
10

Cleaning
Using solutions below, clean and sanitize storage area and beverage lines before starting unit and on a routine
basis as noted below.
Note: Always disconnect power before cleaning dispenser.
Do not run plastic parts through a dishwasher.
Solution A: Combine 1 oz (250ml) bleach with 2 gal (8L) hot water or use Ecolab Mikro-chlor Cleaner
per manufacturers instructions.
Solution B: Combine 1/4 oz (50ml) bleach with 2 gal (8L) hot water or use Ecolab Mikro-chlor Cleaner
per manufacturers instructions.
Note: Cleaning solutions temperature must be at 75˚ – 125˚F (24˚ to 52˚C)
Recommended cleaning prior to startup
Cleaning ice storage area before use
1. Refer to disassembly instructions (see Service section) and remove dispense wheel from ice storage area.
2. Remove auger, auger tube and dispense mechanism.
3. Wipe all components and ice storage area with cleaning Solution A.
4. Rinse all components and ice storage area thoroughly with clear, potable water.
5. Wipe all components and ice storage area with sanitizing Solution B.
Cleaning beverage lines
Prepare 6 gallons (23L) of cleaning Solution A. Fill a clean product tank with cleaning solution. Fill a second
clean product tank with potable rinse water.
1. Disconnect all syrup lines from product containers.
2. Connect syrup line #1 to cleaning solution tank, pressurize tank to 20-50 psi, and dispense 1/2
gallon (2L) of solution into a suitable container from valve #1.
3. Connect syrup line #1 to rinse tank, pressurize tank to 20-50 psi, and dispense 3 gallons (11L)
into a suitable container from valve #1.
4. Repeat this cleaning and rinsing for all syrup lines.
5. Remove diffusers and nozzles from valves, soak in cleaning solution, rinse well and reinstall.
Sanitizing beverage lines
Prepare 6 gallons (23L) of sanitizing Solution B. Fill a clean product tank with this solution.
1. Connect one tank to syrup line #1. Dispense 1/2 gallon (2L) from valve #1.
2. Repeat for all remaining syrup lines, allowing sanitizing solution to remain in all circuit lines for
15 minutes.
3. Connect a clean, empty tank (pressurized to 50 psi) to each syrup line and blow out sanitizer by
operating each valve.
4. Remove diffusers and nozzles from valves, soak in sanitizing solution for 15 minutes, rinse well and
reinstall.
5. Reconnect all lines and dispense product through valves to purge any remaining sanitizer.
11

Recommended daily dispenser cleaning
1. Remove all debris from drain pan.
2. Pour 1 gallon (4L) hot water into drain pan to keep drain lines clear.
Recommended weekly dispenser cleaning
1. Remove drain pan and grille and wash with Solution A. Rinse thoroughly.
2. Remove nozzles and diffusers from valves, soak for at least 10 minutes in cleaning Solution A, rinse,
sanitize with Solution B and reinstall.
3. Pour a solution of one cup (8oz/237ml) household bleach mixed with one gallon (3.8L) hot water into
drain pan to help prevent algae growth in drain lines.
Recommended quarterly dispenser cleaning
1. Remove top from dispenser and turn power switch to OFF position.
2. Remove ice from storage area.
3. Remove dispense chute cover, chute, auger motor assembly, auger and auger tube (see Service section).
4. Remove drain pan, grille and dispense wheel (see Service section).
5. Clean all components and bin storage area with Solution A, rinse thoroughly with clear water and sanitize
with Solution B.
6. Remove nozzles and diffusers from valves, soak for at least 10 minutes in cleaning Solution A, rinse,
sanitize with Solution B and reinstall.
For units with integral ice-water bath beverage cooling only:
1. Remove dispenser lid and counter access panel opposite ice tower side.
2. Disengage service drain tube (on utility connection side of dispenser) from mounting bracket.
3. Pull bath service drain tube down through beverage line opening in counter and drain water bath into a bucket.
4. Use a bottle brush to clean coils with Solution A, rinse and sanitize with Solution B.
5. Reposition ice water bath drain tube in up position so water does not drain out.
6. Pour Solution A into ice water bath until it flows out of bath overflow drain.
7. Turn power ON to unit and dispense a small cup of ice to activate pump.
8. Allow pump to run for two minutes to clean pump and pump lines.
9. Turn power OFF.
10. Drain bath and replace drain tube in mounting bracket in up position to avoid siphoning water bath water.
Putting unit back in service after quarterly cleaning
1. On units with integral beverage cooling, fill ice water bath with water until water spills out of
bath overflow drain.
2. Reassemble components.
3. For manual load units, fill unit with an approved ice (see important cautions on page 4).
4. For automatic load units with R400A/W (R404A refrigerant) icemakers, turn bin signal switch(es) and
dispenser power switch to ON position and allow storage area to fill.
5. Dispense and discard all ice, verifying dispenser is functioning properly.
Recommended quarterly cleaning of optional icemaker.
Units equipped with optional icemakers require cleaning of icemaker system at least every three months, and more
often if local water conditions dictate. Failure to clean icemaker system will result in decreased performance and
potential damage to icemaker. Refer to Icemaker Installation, Operation and Service Manual.
12

Service
Dispense chute cover removal
1. Remove top cover.
2. Push chute cover up vertically to slip off
holding tab.
3. After clearing tab, pull chute cover forward
to remove.
Auger motor assembly removal
1. Remove top cover.
2. Remove one thumbnut on rear of motor bracket.
3. Lift motor bracket and motor up, unplug electric
quick disconnects and remove.
Dispense mechanism assembly removal (Fig. 2)
1. Remove top cover.
2. Remove chute cover (see above).
3. Remove auger motor assembly (see above).
4. Remove quick release pins from the ice chutes
and gates, then unplug wires from solenoids.
5. Lift dispense mechanism up and off auger tube.
Auger and auger tube removal (Fig. 3)
1. Remove auger motor and dispense mechanism
assembly (see above).
2. Pull auger upward to clear auger tube.
3. Lift auger tube upward to clear dispenser top.
4. Slide tube and bearing plate through auger
tube gasket.
Dispense wheel removal
1. Remove drain pan assembly and bin access
cover.
2. Remove center thumbnut and threaded rod on
dispense wheel assembly and lift wheel out
front access opening.
solenoid
quick
release
pin
quick
release
pin
gate
ice
chute
Dispense assembly, Top View
(RH unit with bath shown)
RH, 8-valve unit
Front View
dispense
chute
drain pan
assembly
valves chute
cover
top cover
Fig. 1
Fig. 2
2
wheel
motor
baffle
plate
wheel
motor
mounting
plate
dispense
wheel
auger
tube
auger
auger motor
Side View
auger
bearing
plate
stationery
agitator
rotating
agitator
dispenser
Front View
Fig. 3
13

14
Wiring diagram
115 VOLTS
24 VOLTS
RED - WARM
STATUS LIGHTS
GREEN - COLD
BATH CONTROL BOARD
BEVERAGE COOLING OPTION
BLUE
BLACK
Valve_1
BLACK
Valve_6
ICEMAKER #1
Valve_9
Valve_4
YELLOW
Valve_10
BLACK
PL7-2
BLACK
Valve_5
YELLOW
Valve_8Valve_7
24V JUNCTION BOX
ICEMAKER #2
BIN SIGNAL (24V)
Valve_3
Valve_2
RED
YELLOW
SOLENOID
DISPENSE
(12 SEC ON: 1 MIN OFF)
AUTOFILL RELAY YELLOW
YELLOW
R2 A
PL4-4 YELLOW
BIN SIGNAL (24V)
AUTOFILL TIMER BROWNB
5 SEC ON
18 MIN OFF 3
12
PL4-3
NC
YELLOW
DISPENSE RELAY
PL4-1
BATH
SOLENOID
PL4-2
YELLOW
AYELLOW
24 V YEL
WHITE
BATH SOL
24VACYEL
BLUE
NO
BR1
BROWN
SWITCH
PL1-3
BROWN
(OPTIONAL)
KEYSWITCH
PL7-1
PL1-4
AUTOFILL OPTION IM_#2
BLUE
SWITCH
DRAINPAN
BROWN
NO
C
BEV HARN
PL6-2
RED
PL6-4
IM_#1
T-STAT
BLUE
BLUE
BIN T'STAT
3322
RED
SENSOR
BROWN
R1
DISPENSE
9
RED 6
T
RED
RED
CNO
24VAC RED
TEMP
BATH SOL
C
DISPENSE
SWITCH PL6-3
BROWN
T1
RED
PL6-1
RED
24 V RED
4
DISPENSE
ORANGE
L2
PURPLE
RED
CLOCKWISE ROTATION
PL3-3
BLK WHT
M2
BLUE
WHEEL MOTOR
L2
BLUE
R2
7
9
PL3-1
BLUE
RED
BLUE
RED
PL3-2
ORANGE
PURPLE
6
1
AUTOFILL
BLUE
RED
CLOCKWISE ROTATION
PL2-2
WHITE
L2
M1 BLK
AUGER MOTOR
PL2-1
PL2-3
RED
WHITE
BATH CONTROL
BOARD
PL3-2
PL3-1
BLUE
COUNTERCLOCKWISE ROTATION
BLK
M2
WHEEL MOTOR
(35 MIN ON DELAY)
BLK WHT
PL3-3
RED
BLUE
BLUE
RED
WHITE
BATHPUMP MOTOR
PL5-2
M3
L2
L2
PL5-1
PUMP
BLUEBLUE
AUTOFILL
AUTOFILL
PURPLE
R2
9
7RED
6
1
R2
PURPLE MTR
READY
LID
MTR
PL2-1
COUNTERCLOCKWISE ROTATION
PL2-3
M1
AUGER MOTOR
PL2-2
WHITE
BLK
REDRED
PURPLE
PURPLE
7
R1
POWER
SWITCH SWITCH
POWER
READY
SWITCH
AUTOFILL OPTION
BEVERAGE COOLING OPTION
ORANGE
GRAY
BLACK
LID
GRAY
REAR
ORANGE
NO
PL1-2
BLACK
C
LID
CNO
DRAIN
PAN
TOP LID
SWITCH
PL1-1
CNO
BLACK
BLACK
L1
TERMINAL STRIP CONNECTION
PIN and SOCKET CONNECTION
LEGEND
Right hand unit Left hand unit

If problems persist after following this basic troubleshooting guide, call Follett’s
technical service department toll at [phone] or (888) 2-FOLLETT
or [phone].
Symptom
Ice does not dispense.
• Auger motor does not run
• Wheel motor does not run
Ice does not dispense.
• Auger motor runs
• Wheel motor runs
• Gate does not open
Ice does not dispense.
• Auger motor does not run
• Wheel motor runs
Ice does not dispense.
• Auger motor runs
• Wheel motor does not run
Warm drinks or soda foaming.
No ice in dispenser.
Possible cause
1. Power switch faulty or in OFF
position; loose connection.
2. Faulty dispense switch.
3. Faulty transformer.
4. Drain pan ajar.
5. Faulty drain pan safety switch.
1. Loose electrical connection.
2. Linkage problem between
solenoid and gate.
3. Faulty solenoid.
1. Loose electrical connection.
2. Faulty auger motor.
3. Faulty run capacitor.
1. Loose electrical connection.
2. Faulty wheel motor.
3. Faulty run capacitor.
1. No ice in storage bin.
2. Water drained out of ice water
bath.
3. Circulating pump not running.
1. Power switch in OFF position or
faulty.
2. Bin signal switches in OFF
position or faulty.
3. Faulty bin thermostat.
4. Faulty transformer.
5. Icemaker related problem.
6. Faulty or disconnected wiring.
Solution
1. Turn power switch to ON position;
check connections.
2. Replace switch.
3. Replace transformer.
4. Check pan and reseat.
5. Replace switch.
1. Check connections.
2. Check linkage.
3. Replace solenoid.
1. Check connections.
2. Check auger motor.
3. Check run capacitor.
1. Check connections.
2. Check wheel motor.
3. Check capacitor.
1. Fill storage area with ice or check
icemaker operation.
2. Check that ice water bath drain
tube is in fixed upright position.
3. Check pump and PC board for
output.
1. Check switch and replace if
necessary.
2. Check switch and replace if
necessary.
3. Replace bin thermostat.
4. Replace transformer.
5. Refer to icemaker Operation and
Service Manual for diagnosing.
6. Check for power and bin signal on
icemaker PC board.
Dispenser troubleshooting guide
Before calling for service
1. Check that ice is in the dispenser and that congealed cubes are not causing a jam.
2. Check that circuit breaker and switches are in ON position.
3. Check that drain pan, rear lid and top are on securely. If ajar, dispenser will not operate. When the top is off,
auger does not operate, even though the solenoids do (page 16).
4. Check that all drains are clear.
Note: For units equipped with Follett compressed nugget icemaker, see Icemaker Operation and Service
Manual for service and troubleshooting information.
15

16
Condition Pump Solenoids Auger Wheel Beverage
valves
Top lid off OFF ON OFF OFF ON
Rear lid off ON ON OFF OFF ON
Drain pan off ON ON OFF OFF OFF
On/off switch
in off position OFF OFF OFF OFF OFF
Beverage
switch in OFF
position ON ON ON ON OFF
Operational Status
The chart below shows the operational status of various parts when certain switches are turned off or accessories
are removed.
Electrical box
Front View
Waterbath circuit board operation
The temperature sensor is hard wired directly to the circuit board. The waterbath circuit board operates on 24
volts AC. The bath pump will run for 35 minutes whenever ice is dispensed or the bath calls for ice.
Optimal beverage temperature is controlled by the circuit board located in the electrical box. The board monitors
the waterbath temperature and holds it to a factory setting. When the Red LED is ON, the bath solenoid, auger
motor, wheel motor and bath pump are energized. Ice will be dispensed into the waterbath for 12 seconds, then
stop for 60 seconds. The pump will stay energized, and the circuit board will then monitor the water
temperature. If it is below the set point, the Green LED will come on, the Red LED light will go off, and ice will
not dispense into the waterbath. If the temperature of the bath is determined to be above the set point, the Red
LED will remain on. The circuit board has a delay of 60 seconds before more ice is dispensed into the
waterbath.
LED indicators:
Green – the waterbath is at the set temperature.
Red – the bath temperature is above the set temperature and the bath is calling for ice.
Flashing LED indicators:
Flashing Red and Green – the circuit board has gone into an error mode:
Alternate flashing – circuit board has power and is waiting for hopper cover and dispenser top to be
replaced.
Simultaneous flashing – the waterbath did not reach set temperature in 40 minutes. Reset this error
mode by turning power off, removing top lid, drain pan or rear lid.
I
0I
0I
0
power on/off
switch
#1 #2
icemaker
switches
probe
warm/red LED cold/green LED
bev. bath
indicator

Replacement parts
Reference # Description Part #
1Lid, 8 valve unit (includes “Follett” label) 502436
1Lid, 10 valve unit (includes “Follett” label) 502437
2Label, “Follett” 502438
3Cover, dispense chute, lever operation 502439
3Cover, dispense chute, push-button operation (includes button) 502440
4Switch, push-button operation 502441
5Backsplash, RH unit, 8 valves 502445
Not shown Backsplash, LH unit, 8 valves 502444
Not shown Backsplash, RH unit, 10 valves 502443
Not shown Backsplash, LH unit, 10 valves 502442
6Drain pan, 8 valve unit 502446
Not shown Drain pan, 10 valve unit 502447
7Grille, drain pan, 8 valve unit 502450
Not shown Grille, drain pan, 10 valve unit 502451
8Cover, ice storage bin, rear — all U155 units (except N units) 502452
Not shown Cover, ice storage (under drain pan) — all U155 units 502453
9Switch, key lock for valves 501409
Not shown Key, beverage lock switch 501286
10 Panel, end, beverage, RH unit 502584
Not shown Panel, end, beverage, LH unit 502583
Not shown Panel, access, RH and LH units 502585
Not shown Panel, rear, motor support, RH unit 502586
Not shown Panel, rear, motor support, LH unit 502587
Not shown Panel, front, dispense mechanism, RH unit 502588
Not shown Panel, front, dispense mechanism, LH unit 502589
Not shown Panel, rear, 8v 502590
Not shown Panel, rear, 10v 502591
11 Label, ice, dispense cover, push-button 502623
Not shown Label, ice, dispense cover, lever 502622
Not shown Clip, Tinnerman, 10-32 502621
12 Thumbscrew, backsplash, 10-32 x 1/2 501100
Not shown Legs, 6" (153mm) adjustable to 9" (229mm) — set of 4 502454
Not shown Screw, 10-32 x 1/2 502287
Not shown Plug 2 lead, male 502333
Not shown Plug 2 lead, female 502334
Top View
8 valve (8v) unit with right hand (RH) tower Front View
8 valve (8v) unit with right hand (RH) tower
(push-button dispensing)
8
7
1
2
6
9
5
1
4
3
10
12
11
Dispenser exterior
17

Dispense assembly, Side View
(RH unit with bath shown)
Reference # Description Part #
1Gate, dispense 502455
2Linkage pin, gate/solenoid 502456
3Pin, quick release, 3" (77mm), bath gate and lever 501949
4Pin, quick release, 5.53" (141mm), dispense gate 502102
5Solenoid (includes linkage pin) 402403
6Dispense mechanism assembly, bath, RH unit 502448
Not shown Dispense mechanism assembly, bath, LH unit 502449
Not shown Dispense mechanism assembly, non-bath RH unit 502458
Not shown Dispense mechanism assembly, non-bath, LH unit 502496
7Spring, dispense mechanism (1 per side) 501950
8Chute, ice 502457
9Wrap, dispense mechanism 502607
10 Bushing, Ni liners 501249
11 Screw, 8-32 x 5/16 502625
12 Pin, spring 502624
Not shown Push pins, clear chute 502618
Not shown Chute, focus — clear plastic 502459
Not shown Lever, dispense 501953
6
7
8
2
5
Dispense assembly
Top View
8
11 9
12 5
2
12
3
10
1
10
4
10
1
10
7
11
18

Reference # Description Part #
1Coil, 14" (356mm) riser — carbonated water 00107391
2Coil, 12-1/2" (318mm) riser — plain water/carbonated water 502461
3Coil, syrup 502462
4Pump, water bath (includes mounting plate and elbow) 00111476
5Pump, discharge assembly, RH, 8v (includes 2 elbows) 00109314
Not shown Pump, discharge assembly, LH, 8v (includes 2 elbows) 00109322
Not shown Pump, discharge assembly, RH, 10v (includes 2 elbows) 00109330
Not shown Pump, discharge assembly, LH, 10v (includes 2 elbows) 00109348
6Elbow, overflow drain, 1" (26mm) x 3/4 MPT 502465
Not shown Elbow, clean-out drain, 3/8" (10mm) x 3/8 MPT 502466
7Manifold, carbonated water, 8 valve unit 502468
Not shown Manifold, carbonated water, 10 valve unit 502469
Not shown Manifold, 8 valve unit without beverage bath 502470
Not shown Manifold, 10 valve unit without beverage bath 502494
8Bath, splash shield, RH 502596
Not shown Bath, splash shield, LH 502595
9Clamp, elbow, bath 502626
10 Screw, 8 x 1/2, stainless 502627
11 Fitting, beverage valve 207855
12 Clamp, Otieker, 1/4" (7mm) 00113761
5
3
7
2
1
6
4
Waterbath
Top View
Side View
8
9
10
10
10
4
19
11
12

2
Reference # Description Part #
1Auger, LH unit (black, stamped with “1”) 502491
Not shown Auger, RH unit (gray, stamped with “2”) 502492
2Tube, auger, LH unit with beverage bath 502486
Not shown Tube, auger, RH unit with beverage bath 502485
Not shown Tube, auger, RH unit without beverage bath 502487
Not shown Tube, auger, LH unit without beverage bath 502488
3Wheel, dispense (includes stud and rotating agitator) 501681
4Baffle (under dispense wheel) 501684
Not shown Drive bar (under dispense wheel) 501682
5Motor, vertical auger 502476
6Motor, wheel 502560
Not shown Seal, wheel motor 501333
Not shown Spacer, wheel motor 501768
Not shown Capacitor, wheel motor 501782
7Agitator, rotating, 21" (534mm) long 502484
8Plate, wheel motor mounting 502615
9Agitator, stationery 502490
10 Plate, auger bearing 501696
Not shown Bracket, ice tube, double tube 502497
Not shown Ice transport tube (sold by the foot) 500366
Not shown Ice transport tube, 10 ft 502522
Not shown Ice transport tube, 20 ft 502523
Not shown Insulation, transport tube (sold by the foot) 501176
Not shown Cover, blank ice entry 502674
Not shown Thermostat 501432
Not shown Gasket, ice entry 502672
Not shown Plate, ice entry, 2 holes 502673
Hopper
9
6
7
4
8
3
2
1
5
10
Side View
20