Follett U155 Manual

Installation, Operation and
Service Manual
U155 Series
Ice and Beverage Dispensers
Cool Ideas For Ice Management
207896
10/00
801 Church Lane • PO Box D, Easton, PA 18044
Toll-free [phone] • (888) 2-FOLLETT
[phone] • FAX [phone] • www.follettice.com
®UL
®
Following installation, please forward this manual
to the appropriate operations person.
Automatic load units
with two icemakers
Manual load units Automatic load units
with one icemaker
UL
®
C

Contents
Before you begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing U155 dispenser in counter . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing remote icemaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Connecting beverage lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cleaning procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Service information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Disassembly for service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Dispenser troubleshooting guide . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Operational status chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dispenser exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dispense assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Water bath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Hopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Auger motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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 toll-free, [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.
Specifications
Electricity
Each icemaker and dispenser requires separate circuit with electrical disconnect within 10 feet (6
meters). Equipment ground required. Standard electrical - 115V, 60 Hz, 1 phase. Max. fuse dispenser –15 amps;
ea. icemaker –20 amps
U155BR5AXR
Condenser type –A = air cooled, W = water cooled
Remote icemaker(s) capacity and refrigerant –5 = 400 lbs (181kg)/day, R22
10 = 800 lbs (363kg)/day, R22
B = beverage bath equipped. Absence of a B = no integral beverage cooling
N = no beverage rail or valves
Approximate storage capacity in lbs
Dispenser configuration –U = undercounter
2
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.
• 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 toll-free at (800) 523-
9361 or (888) 2-FOLLETT, or [phone].
•Follett recommends use of an activated carbon filter for units equipped with icemakers.
•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.
Model Icemaker Dispenser
number amperage amperage
U155, U155X 2.4 amps
U155B, U155BX 4.4 amps
U155R5A/W, U155R5A/WX 11.0 amps 2.4 amps
U155BR5A/W, U155BR5A/WX 11.0 amps 4.4 amps
U155R10A/W, U155R10A/WX 11.0 amps ea (2) 2.4 amps
U155BR10A/W, U155BR10A/WX 11.0 amps ea (2) 4.4 amps
Ice dispense chute location –R = right side, L = left side
Presence of an X = 10 soda valves

Plumbing
Dispenser - 3/4" PVC slip joint for hopper drain
3/4" PVC pipe nipple for beverage drain pan
3/4" PVC pipe nipple for bath overflow
Note: Drains should be hard piped and insulated. Maintain at least 1/4" per foot (6mm per
30.4cm run) slope on drain line run.
Icemaker - Refer to Icemaker Installation Manual packed with icemaker for installation instructions
1/4" FPT water in
1/2" MPT drain
3/8" FPT condenser inlet (water cooled condenser only)
1/2" FPT condenser drain (water cooled condenser only)
Water disconnect within 10 feet (3 meters) of dispenser is suggested for automatic load units.
Beverage connections
•Dispenser is provided with 1/4" syrup, 3/8" carbonated water and 3/8" plain water pigtails
Clearance and access information
•51" (1296mm) above counter
•12" (305mm) on side opposite tower, below counter
•Counter front or rear panel must be removable for service access to both sides of dispenser and
icemaker(s), (if any)
•Below counter access to drain clean-out required on utility side of dispenser
•See Icemaker Installation Manual packed with icemaker(s) for clearance requirements for automatic load
dispensers
3
17"
(432mm)
6"
min 12"
min
18.9"
(481mm)
PVC
joint
drain
slip
3/4" beverage line
air break*
electrical
connections
31.25"
(794mm)
21.75"
(553mm)
28"
(712mm)
counter top
49.75"
(1264mm)
(8 valve unit)
(10 valve unit)
37.25"
(947mm)
Manual load units
Automatic load units with 1 icemaker
Automatic load units with 2 icemakers
27.375"
(696mm)
ice transport
tube entrance
6"
(153mm)
25.8"
(656mm)
bin
signal
power
8.75"
(223mm)
3/4 PVC
slip joint
drain
18.5"
(470mm)
air
beverage
waterbath
overflow
break*
beverage
drain pan
drain
*DO NOT
CONNECT TO
DRAIN SYSTEM
3.5"
(89mm)
Side view - right hand dispenser
(side opposite dispense tower) Front view —units with up to 10 beverage valves

X
Electric power source Standard electrical - 115V, 1 Ph, 60 Hz,
max. fuse size 15 amps
BL W
GND
GRN
GND
GRN
BL
W
LEGEND
Wirenut field
connections
XEquipment
ground
BL - black
W - white
GRN - green
Left junction box
Field wiring diagram is intended to aid
electrician or technician in understanding
how equipment works. All field wiring
must be installed in accordance with NEC
and local electrical codes.
IMPORTANT
15 amp fused
disconnect Right junction box
BL
Y
R
U155 dispenser
NOT USED
(115 volts)
BL - blue
R - red
Y - yellow
4
Standard electrical - 115V, 1 Ph, 60 Hz,
max. fuse size 15 amps
LEGEND
Wirenut field
XEquipment
B - black
W - white
GRN - green
Left junction box
Field wiring diagram is intended to aid
electrician or technician in understanding
how equipment works. All field wiring
must be installed in accordance with NEC
and local electrical codes.
IMPORTANT
X
Electric power source
BW
GND
GRN
GND
GRN
B
W
15 amp fused
disconnect Right junction box
BL
Y
R
U155 dispenser B
W
W
B
X
Electric power source
BL W
GND
GRN
X
GND GRN
B
W
15 amp fused
disconnect
BL W
GND
GRN
X
GND GRN
B
W
15 amp fused
disconnect
Icemaker #1
Lower junction box
Lower junction box
Icemaker #2 (optional)
Upper junction box
Upper junction box
(115 volts)
GND - ground
BL - blue
R - red
Y - yellow
(115 volts) (24 volts)
(115 volts)
(24 volts)
X
(24 volts)
connections
ground
automatic load units
Field wiring diagrams
manual load units
On all models with remote
icemaker(s), the black wire on the
icemaker control board’s(s’) LINE
VAC terminal must be moved to the
24V terminal.

Installation
Installing U155 dispenser in counter
1. Check that dispenser location meets all requirements in this manual and cut counter as shown. (NOTE: Different
cut-outs for 8 and 10 valve units!)
2. Block up area below counter cut-out to support dispenser when lowered into place.
3. For automatic load dispensers, disconnect ice transport tube from bracket in storage area of dispenser. (Since this
tube must be reinstalled in bracket after dispenser is dropped into counter, note how tube is held by bracket tabs
before disconnecting.)
4. Carefully lower dispenser into counter until it rests on support blocks.
5. Adjust height from below until dispenser flange rests flush with counter.
6. 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 and smooth sealant to a 1/8" (4mm) radius.
7. Install a hard drain line, maintaining at least a 1/4" per foot (6mm per 30.4cm run) slope, and insulate line to
prevent condensation.
8. Make electrical connections in accordance with applicable wiring diagrams provided, as well as NEC and local
codes. Provide disconnects within 10 ft (3m) of dispenser and icemaker for servicing.
26.25"
Front of counter
+.125"
- .125" + .125"
- .125"
30.375"
(772mm) +3mm
- 3mm (667mm)
+3mm
- 3mm
26.25"
Front of counter
+.125"
- .125" +.125"
- .125"
36.375"
(924mm) +3mm
- 3mm (667mm)
+3mm
- 3mm
Counter cut-out
units with up to 8 valves
Counter cut-out
units with 10 valves
All U155 dispensers must be installed level in both directions and supported
from below with 6" - 9" (153 - 229mm) adjustable leg accessory provided, or
channels installed on site. Do NOT hang dispenser on flange.
!
PVC pipe is suggested. Care must be taken in sweating any metal drain pipe
used. Excessive heat applied while sweating metal pipe may melt plastic
fitting on dispenser.
!
5

Installing remote icemaker (automatic load units only)
1. Position icemaker in desired location.
2. Push one end of ice transport tube(s) through hole(s) provided in side of dispenser.
3. Route tube into ice tube bracket inside dispenser and engage bracket tabs in holes located in end of ice
transport tube(s). (See drawings below.)
4. Proceed with ice transport tube installation from dispenser to icemaker in compliance with instructions
contained in icemaker installation manual packed with icemaker.
6
Correct installation of remote icemaker(s) is critical to proper performance
of icemaker and dispenser.
Check bin signal on icemaker control board for 24 volt connection. Switch if
necessary.
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 will void warranty.
!
Ice tube retainer bracket
Tabs in ice tube
retainer bracket
engage holes in ice
tube and hold tube
in place
1"
2.54 cm
ice tube
Side view
Front view**
thermostat
ice tube
**Bracket for right hand unit
shown. On left hand units,
thermostat installed on right
side of bracket (side
opposite dispense tower).

Connecting beverage lines
1. Connect syrup and water lines, following drawings for appropriate model U155 dispenser. Non-carbonated water line
will be labeled “water”.
2. Clean and sanitize beverage lines in accordance with cleaning instructions that follow.
To start-up and operate dispenser
1. Follow detailed cleaning instructions in service manual before operating dispenser.
2. Follow instructions for beverage line hook-up, and restrictions on ice that can be manually filled into a Follett
dispenser.
3. On units with Follett integral ice-water bath beverage cooling (“B”models) only, slowly pour water into ice-waterbath
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.
4. For manual load units, remove front drain pan or rear lid and fill storage area with compatible ice.
5. Turn power switch located on control box to "ON" position.
6. For automatic fill units, follow detailed instructions in icemaker installation section of installation manual, then turn
icemaker (bin signal) switch(es) located on control box to "ON" position and begin to make ice.
7. When dispenser has at least 6" (155mm) of ice in storage area, press "PUSH FOR ICE" lever or button to ensure
that dispenser is operating properly. NOTE: IF ADDITIONAL START-UP INFORMATION IS NEEDED, CALL
FOLLETT CORPORATION AT [phone].
NOTES:
Syrup lines are numbered and correspond to the valves as shown in drawing
above. Valve one is always adjacent to ice tower.
Numbered beverage lines extend out from side of dispenser opposite ice chute.
Valve position #1 is always next to ice
tower. Right-hand unit shown.
1
2
34
56
7
8910
7
Follett manual load dispensers can accommodate most cube/cubelet ices up
to 1" square and Follett compressed nugget ice. Crushed, flake, nugget,
bagged 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 questions about ice compatibility, call Follett's customer
service group toll-free at [phone] or (888) 2-FOLLETT, or [phone].
!

8
User information
How the dispenser works
Follett's U155 Series ice dispensers are available in manual load configurations (using ice from another source)
or automatic load configurations, fed from one or two Follett 400 lb (181kg)/day remote icemakers.
In all models, ice is stored below the counter in the dispenser storage area. When the dispense lever or button is
pushed, the dispense motor is 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 f. (6m) away from the dispenser. As water freezes to the inside walls of the icemaker
evaporator, a rotating stainless steel auger removes ice and carries it to the top of the evaporator assembly
where it is compressed and extruded through an outlet port. The extruded ice is then pushed through the tube to
the storage compartment of the dispenser. A level fill circuit maximizes fill in the storage area by rotating the
wheel at intervals until the bin is completely filled. When the bin is filled, a bin stat 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 water bath timer circuit that activates the
water bath pump for 35 minutes when ice lever or button is activated, or when the ice water bath periodically calls
for more ice.
Cleaning
Using solutions below, clean and sanitize storage area and beverage lines before starting up unit and on a
routine basis as noted below.
Solution A: Prepare a cleaning solution (200 ppm of available chlorine content) of Ecolab Mikro-chlor
Cleaner or equal chlorinated detergent. Cleaning solution temperature must be at
75˚–125˚F (24˚to 52˚C).
Solution B: Prepare a sanitizing solution (50 ppm of available chlorine content) of Ecolab Mikro-chlor
Cleaner or equal chlorinated detergent. Sanitizing solution temperature must be at
75˚–125˚F (24˚to 52˚C).
Cleaning bin before use
1. Wipe storage area with Solution A.
2. Rinse thoroughly with clear, potable water.
3. Wipe with Solution B to sanitize.
Warning: Always disconnect power before cleaning dispenser.
!

Cleaning and sanitizing beverage system before use
Cleaning
Prepare 6 gallons (23 liters) 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 circuit #1 to cleaning solution tank, pressurize tank to 20-50 psi, and dispense 1/2
gallon (2 liters) of solution into a suitable container from valve #1.
3. Connect syrup circuit #1 to rinse tank, pressurize tank to 20-50 psi, and dispense 3 gallons (11 liters)
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
Prepare 6 gallons (23 liters) of sanitizing Solution B. Fill a clean product tank with this solution.
1. Connect one tank to syrup circuit #1. Dispense 1/2 gallon (2 liters) from valve #1.
2. Repeat for all remaining circuits, 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 circuit 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.
Periodic cleaning of dispenser
Recommended daily cleaning of drain pan
1. Remove all debris from drain pan.
2. Pour 1 gallon (4 liters) hot water into drain pan to keep drain lines clear.
Recommended weekly cleaning
1. Remove drain pan and grill 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 (3.8 liters) hot water into drain
pan to help prevent algae growth in drain lines.
9
Failure to remove all sanitizer may result in health hazard.
!
DO NOT run plastic parts (drain pan, dispense chute cover,
dispense wheel) through a dishwasher.
!

Recommended quarterly cleaning (every 3 months)
1. Turn power switch to "OFF" position and remove top from dispenser.
2. Remove ice from storage area.
3. Remove dispense chute cover, chute, auger motor assembly, auger and auger tube (see page 11).
4. Remove drain pan, grill, dispense wheel and cover plate (see page 12).
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.
7. Clean area below wheel and stainless cover plate with Solution A, rinse and sanitize with Solution B.
8. For units with integral ice-water bath beverage cooling only:
•Remove side access panel opposite ice tower.
•Lower drain tube found on utility connection side of dispenser and drain ice-water bath.
•Use a bottle brush to clean coils with Solution A, rinse and sanitize with Solution B.
•Reposition water bath drain line in "UP" position so water does not drain out.
•Pour Solution A into water bath until it flows out overflow drain.
•Turn power ON and push dispense lever or dispense button back in "dispense" position.
•Allow pump to run for 2 minutes to clean pump and pump lines.
•Turn power OFF.
•Drain bath and replace drain tube 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 caution statement on page 1).
4. For automatic load units with R5A/W (R22 refrigerant) icemakers, turn bin signal switch(es) and dispenser
power switch to "ON" position and allow storage area to fill.
5. Push dispense button or lever to test that dispenser is functioning properly.
Quarterly cleaning of icemaker system
Units equipped with 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 Operation and Service Manual.
10
On push button units, remove dispense switch from dispense chute
cover before cleaning chute cover.
!

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.
Dispense mechanism assembly
removal
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
(see drawing p. 12)
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.
Auger motor assembly removal
1. Remove top cover.
2. Remove one thumbnut on rear of motor bracket.
3. Lift motor bracket up and unplug electric
quick disconnects.
4. Remove motor assembly.
11
solenoid
quick
release
pin
quick
release
pin
gate
ice chute
Disassembly instructions for periodic cleaning
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

Service
Disassembly instructions for service requirements only –NOT required for
any cleaning procedure.
Dispense wheel motor removal (see drawing above)
1. Remove drain pan, bin access cover and dispense wheel.
2. Remove stainless steel baffle plate under dispense wheel.
3. Remove two screws holding wheel motor bracket on bin.
4. Lift plate and motor up.
5. Unplug electric quick disconnects from motor.
6. Lift motor and mounting plate out front access opening.
12
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
front view

Wiring diagram -
13
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
TERMINAL STRIP CONNECTION
PIN and SOCKET CONNECTION
LEGEND
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 BROWN B
5 SEC ON
18 MIN OFF 3
12
PL4-3
NC
YELLOW
DISPENSE RELAY
PL4-1
BATH
SOLENOID
PL4-2
YELLOW
A
YELLOW
24 V YEL
WHITE
BATH SOL
24VAC YEL
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
7
RED
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
Right hand unit Left hand unit

14
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.
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.
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.
Dispenser troubleshooting guide
Before calling for service
1. Check that there is ice in 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 (see chart on page 15).
4. Check that all drains are clear.
5. For units equipped with Follett compressed nugget icemaker, see Icemaker Operation and Service
Manual for service and troubleshooting information.
If problems persist after following this basic troubleshooting guide, call Follett’s
Technical Service Department toll free at [phone] or (888) 2-FOLLETT, or
[phone].

I
0I
0I
0
Operational Status
The chart below shows the operational status of various parts when certain switches are turned off or accessories
are removed.
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
15
Electrical box
front view
Water bath circuit board operation
The temperature sensor is hard wired directly to the circuit board. The water bath 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 water bath 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 water bath 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 water bath. 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 water
bath.
LED indicators:
Green - the water bath 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 is powered up and waiting for hopper cover and dispenser top to be
replaced.
Simultaneous flashing - the water bath did not reach set temperature in 40 minutes. Reset this error
mode by turning off power, removing top lid, drain pan or rear lid.
power on/off
switch
#1 #2
icemaker
switches
probe
warm/red LED cold/green LED
bev. bath
indicator

Replacement parts
Reference # Description Part #
1 Lid, 8 valve unit (includes “Follett”label) 502436
1 Lid, 10 valve unit (includes “Follett”label) 502437
2 Label, "Follett" 502438
3 Cover, dispense chute, lever operation 502439
3 Cover, dispense chute, push button operation (includes button) 502440
4 Switch, push button operation 502441
5 Backsplash, 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
6 Drain pan, 8 valve unit 502446
Not shown Drain pan, 10 valve unit 502447
7 Grill, drain pan, 8 valve unit 502450
Not shown Grill, drain pan, 10 valve unit 502451
8 Cover, ice storage bin, rear —all U155 units (except N units) 502452
Not shown Cover, ice storage (under drain pan) —all U155 units 502453
9 Switch, 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
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)
16
8
7
1
2
6
9
5
1
4
3
10
12
11
Dispenser exterior

Dispense assembly side view
(RH unit with bath shown)
Reference # Description Part #
1 Gate, dispense 502455
2 Linkage pin, gate / solenoid 502456
3 Pin, quick release, 3" (77mm), bath gate and lever 501949
4 Pin, quick release, 5.53" (141mm), dispense gate 502102
5 Solenoid (includes linkage pin) 501961
6 Dispense 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
7 Spring, dispense mechanism (1 per side) 501950
8 Chute, ice 502457
9 Wrap, 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
17
6
7
8
2
5
Dispense assembly
top view
8
11 9
12
11
5
2
12
3
10
1
10
4
10
1
10
7

Reference # Description Part #
1 Coil, 14" (356mm) riser —carbonated water 502460
2 Coil, 12-1/2" (318mm) riser —plain water / carbonated water 502461
3 Coil, syrup 502462
4 Pump, water bath (includes mounting plate and elbow) 502463
5 Pump, discharge assembly, RH, 8v (includes 2 elbows) 502467
Not shown Pump, discharge assembly, LH, 8v (includes 2 elbows) 502632
Not shown Pump, discharge assembly, RH, 10v (includes 2 elbows) 502464
Not shown Pump, discharge assembly, LH, 10v (includes 2 elbows) 502633
6 Elbow, overflow drain, 1" (26mm) x 3/4 MPT 502465
Not shown Elbow, clean-out drain, 3/8" (10mm) x 3/8 MPT 502466
7 Manifold, 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
8 Bath, splash shield, RH 502596
Not shown Bath, splash shield, LH 502595
9 Clamp, elbow, bath 502626
10 Screw, 8 x 1/2, stainless 502627
5
3
7
2
1
6
4
Water bath
top view side view
8
9
10
18
10
10
4

19
2
Reference # Description Part #
1 Auger, LH unit (black, stamped with “1”) 502491
Not shown Auger, RH unit (gray, stamped with “2”) 502492
2 Tube, 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
3 Wheel, dispense (includes stud and rotating agitator) 501681
4 Baffle (under dispense wheel) 501684
Not shown Drive bar (under dispense wheel) 501682
5 Motor, vertical auger 502476
6 Motor, wheel 502560
Not shown Seal, wheel motor 501333
Not shown Spacer, wheel motor 501768
Not shown Capacitor, wheel motor 501782
7 Agitator, rotating, 21" (534mm) long 502484
8 Plate, wheel motor mounting 502615
9 Agitator, 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 502673
Not shown Plate, ice entry, 2 holes 502674
Hopper
9
6
7
4
8
3
2
1
5
10
side view