for the Operation and Service manual for your unit.
Welcome to Follett
Follett equipment enjoys a well-deserved reputation for excellent performance, long-term reliability and outstanding
after-the-sale support. To ensure that this equipment delivers that same degree of service, review this guide carefully
before you begin your installation.
Should you have need technical help, please call our Technical Service group at (877) 612-5086 or (610) 252-7301.
Please have your model number, serial number and complete and detailed explanation of the problem when
contacting Technical Service.
Getting Started
After uncrating and removing all packing material. Inspect the equipment for concealed shipping damage. All freight
is to be inspected upon delivery. If visible signs of damage exist, please refuse delivery or sign your delivery receipt
"damaged." Follett Customer Service must be notied within 48 hours. Wherever possible, please include detailed
photos of the damage with the original packaging so that we may start the freight claim process.
801 Church Lane • Easton, PA 18040, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com
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.
25CI425A-LI
I = ice-only; no water
Dispense actuation, L = lever, S = SensorSAFE
Condenser type, A = air-cooled, water-cooled
Ice machine capacity in lbs per day
Ice machine location, I = integral
Dispenser conguration, C = countertop, H = wall mount
Approximate storage capacity in lbs
CAUTION!
§ Do not tilt unit further than 30° off vertical during uncrating or installation.
§ Dispenser bin area 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 rst.
§ Follett recommends a Follett water lter system be installed in the ice machine inlet water line (standard capacity
#00130229, high capacity #00978957, carbonless high capacity #01050442).
§ Prior to operation, clean the dispenser in accordance with instructions found in this manual.
§ Ice is slippery. Be sure counters and oors around dispenser are clean, dry and free of ice.
§ Do not block right side air intake or top air exhaust.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 3
Page 4
Specications
Countertop
25CI425A/W
36"
(91.5 cm)
50CI425A/W
40"
(101.6 cm)
Wall mount
Front View
21" (53.4 cm)24" (61 cm)
14.25"
(36.2 cm)
AIR INTAKE
AIR EXHAUST
Right Side ViewRear View
3/8" FPT
condenser
inlet (watercooled only)
3/8" FPT
condenser
outlet (watercooled only)
3/4" FPT
drain
10.5"
(26.7 cm)
23"
(58.5 cm)
NEMA
5-15
0.88 (23 mm)
3/4 MPT MALE
Front ViewRight Side ViewRear View
21.5" (54.6 cm)
24.5" (62.2 cm)*
DRAIN
10.5"
(26.7 cm)
3/8" water
inlet
2.63" (6.6 cm)
1.38" (3.5 cm)
2.56" (6.5 cm)
5.69" (14.4 cm)
7.69" (19.5 cm)
25HI425A/W
36.5"
(92.7 cm)
50HI425A/W
40.5"
(102.9 cm)
AIR INTAKE
* Includes 0.5" (13 mm) for bracket supplied with unit.
AIR EXHAUST
14.25"
(36.2 cm)
17"
(43.2 cm)
NEMA
5-15
21.5" (54.6 cm)
4 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 5
Electrical
§ 115 V, 60 Hz, 1 phase, 11.0A
§ Connect to a 15A dedicated circuit.
§ Furnished with 7 ft (2 m) power cord with a 90° NEMA hospital grade 5-15 plug.
Ambient
Air temp*100 F/38 C Max.50 F/10 C Min. (Best performance below 80 F (27 C)
Water temp
†
90 F/32 C Max.45 F/7 C Min. (Best performance below 70 F (21 C)
Water pressure (psi/bar)70/5 Max.10/0.7 Min.
* Ambient air temperature is measured at the air-cooled condenser coil inlet.
†
Ambient water temperature is measured in the ice machine oat reservoir.
Plumbing
Connections 25/50CI425ARough-ins 25/50HI425A
Dispenser drain3/4" MPTAir-cooled 3/4" FPT
Water inlet 3/8" FPT3/8" FPT
Condenser inlet Water-cooled 3/8" FPTN/A
Condenser outletWater-cooled 3/8" FPTN/A
Note: Water shut-off recommended within 10 ft. (3m) of dispenser. Drain to be hard-piped and insulated. Maintain at
least 1/4" per foot (20 mm per 1 m) run of slope.
Ventilation clearances
Air-cooledWater-cooled
Required for ventilation3" (77 mm) each sideN/A
Suggested for service12" (30.5 cm) top,
6" (15.3 cm ) left side
Note: Do not block right side air intake or right side air exhaust.
12" (30.5 cm) top
Dry weight
§ 25/50CI425A/W (countertop): 215 lbs. (98 kg)
§ 25/50HI425A/W (wall mount): 230 lbs. (105 kg)
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 5
Page 6
Installation
Before you begin
§ All dispensers must be installed level in both directions to ensure proper operation.
§ Provide proper ventilation clearances.
§ Countertop units provide the option of taking utilities out bottom or back of dispenser (on wall mount units and
countertop units with legs, utilities exit from back).
§ Wall mount model utilities exit through back of dispenser only.
§ Directions for each installation follow.
WARNING!
§ DO NOT LIFT UNIT AT THESE
POINTS. Panels will not support
weight of unit
§ Failure to follow warning may
result in equipment damage or
personal injury
Installing countertop dispensers with rear
exiting utilities (no legs)
1. Position dispenser in desired location.
2. Mark dispenser outline on counter and
remove dispenser.
3. Drill four 7/16" holes in counter to anchor
dispenser to counter (Fig. 1).
4. Apply a thick bead approximately 1/4" (7 mm)
diameter of NSF listed silicone sealant (Dow
Corning® RTV-732 or equivalent) 1/4" (7 mm)
inside marked outline of dispenser.
5. Reposition dispenser on counter and secure
to counter with four 3/8"-16NCbolts.
6. Smooth excess sealant around outside of
dispenser.
7. Make utility connections (Fig. 2).
CAUTION!
§ Do not connect water-cooled condenser outlet line
to the dispenser drain line.
8. Turn on water supply and check for leaks.
9. Clean dispenser and ice machine before
putting into service.
10. Turn power on and allow ice machine to
produce ice.
Fig. 1 Countertop anchoring locations
1.56"
(40 mm)
4X
12.50"
(31.8 cm)
.50"
(13 mm)
Ø.375"
(10 mm)
hole
20" (50.8 cm)
Fig. 2 Utility connections as viewed from top for
countertop back access
condenser outlet
3/8" FNPT
condenser inlet
3/8" FNPT
potable water
3/8" FNPT
drain
3/4" MPT
power
6 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 7
Installing countertop dispensers with bottom
exiting utilities
WARNING!
§ A sturdy work surface capable of supporting the
entire dispenser must be used.
§ The work surface must be large enough to
accommodate height of dispenser.
§ Failure to provide proper support may result in
personal injury.
1. Position dispenser with dispense chutes facing
upward on sturdy work surface (Fig. 3).
2. Move drain tting from back of dispenser and
mount (Fig. 4.1).
3. Cut drain tube to length and attach to barbed
connection (Fig. 4.2).
4. Move inlet water tting from back of dispenser
and mount (Fig. 4.3).
5. Cut water tubing to length and re-insert into
water tting.
6. Water-cooled only. Disconnect internal
condenser water inlet and outlet ttings.
7. Water-cooled only. Relocate water inlet and
outlet ttings and reconnect (Fig. 4.4). Note:
The water inlet is connected to the condenser;
the outlet line is connected to the water
regulating valve.
8. Remove the drain plug from the internal drain
line connection point and relocate to back of
dispenser and reconnect.
9. Raise the dispenser upright and position in
desired location.
10. Mark dispenser outline on counter and remove
dispenser.
11. Cut countertop utility opening and drill four
7/16" holes to anchor dispenser to counter
(Fig. 5).
12. Apply a thick bead approximately 1/4" (7 mm)
diameter of NSF-listed silicone sealant (Dow
Corning* RTV-732 or equivalent) 1/4" (7 mm)
inside marked outline of dispenser.
13. Reposition dispenser on counter and secure to
counter with four 3/8"-16NCbolts.
14. Smooth excess sealant around outside of
dispenser and make utility connections
through countertop cutout.
Fig. 3
Fig. 4
2
TRIM DRAIN TUBE FOR
NEW DRAIN FITTING
LOCATION.
Fig. 5
4X
Ø.375"
(10 mm)
hole
14.00"
(35.6 cm)
16.00"
(40.7 cm)
1
5
1.56"
(4.0 cm)
21.00"
(53.3 cm)
20.00"
(50.8 cm)
Cutout
connections
through
bottom
5.00"
(12.7 cm)
min.
3
4
0.50"
(13 mm)
1.56"
(4.0 cm)
2.50"
(6.36 cm)
(31.8 cm)
Water cooled
only
16.50"
(41.9 cm)
12.50"
7.00"
(17.8 cm)
CAUTION
§ Do not connect water-cooled condenser outlet line
to the dispenser drain line.
15. Turn on water supply and check for leaks.
16. Clean dispenser and ice machine.
1 7. Turn power on and allow ice machine to
produce ice.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 7
Page 8
Installing wall mount dispensers
Front View
Front View
SIDE VIEW
WARNING!
§ Wall mount dispensers are intended to be mounted
above a sink, eliminating the need for a drain pan.
§ Before beginning installation verify that the sink size
and location meet the requirements shown in Fig. 6.
§ If requirements are not met, a drain pan must be
used to prevent ice and water from falling on counter
or oor.
§ FAILURE TO TAKE THESE PRECAUTIONS
COULD RESULT IN SLIPS AND FALLS ON WET
FLOORS
Fig. 6 – Minimum sink requirements (without drain
pan), front view
Sink centered
below chutes
Sink centered
below dispenser
21.50"
(54.7 cm)
14.25"
(36.2 cm) min.
21.50"
(54.7 cm)
23.00"
(58.5 cm) min.
Fig. 7 – Minimum sink requirements (without drain
pan), side view
24.36" (61.9 cm)
25HI425
35.88" (91.1 cm)
50HI425
39.88" (101.3 cm)
8 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
17.01"
(43.2 cm)
18.92"
(48.1 cm)
30.00" (76.2 cm)
MIN DISTANCE TO SINK FRONT
18.00" (45.7 cm)
SUGGESTED POWER
CORD ROUTING
Page 9
1. Locate wall bracket mounting position relative
to wall studs (Fig. 8). Install the supplied
wall bracket with six 3/8" diameter fasteners
(Fig.10.1).
Note: Three holes are available at each fastening
site to allow capture of studs or supports
within the wall.
2. Locate and cut utility hole (Fig. 10.2) in wall
using Fig. 9 dimensions.
3. Rough in utilities. Wall mount bracket
dimensions can be used as a template.
§ Water: 1/2" FNPT
§ Drain: 3/4" MPT
4. Lift dispenser onto wall bracket positioning
unit so that hook on back of dispenser is
captured by wall bracket support angle
(Fig.10.3).
5. Install two 1/4" X 20 screws through bottom of
wall bracket into bottom of dispenser to secure
dispenser to wall bracket (Fig. 10.4).
6. Install supplied 1/2" MPT X 3/8" push-in
adapter onto 1/2" FNPT water supply.
Fig. 8 – Wall bracket location guide
TOP VIEW
1.00" (25 mm)
ANCHOR POINTS
0.438" (11 mm)
CLEARANCE
12.37" (31.4 cm)
3.44" (8.7 cm)
3.53" (9.0 cm)
2.00" (51 mm)
FRONT VIEW
16.00"
(406 mm)
WALL STUDS
WALL STUDS
13" (33.0 cm)
15" (38.1 cm)
0.75"
(19 mm)
19" (48.3 cm)
21" (53.3 cm)
6.00"
(15.2 cm)
25HI425A
50HI425A
25HI425A
50HI425A
Fig. 9 – Wall mount, utility location
FRONT VIEW
1.43" (3.6 mm)
3.99" (10.1 cm)
POTABLE WATER
3/8 COPPER TUBE
6.70" (17.0 cm)
POWER CORD EXIT
10.69" (27.1 cm)
3/4 COPPER TUBE
WALL CUTOUT
Fig. 10 – Wall mount bracket and fastener
requirements
3
1
0.77" (2.0 cm)
2
4
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 9
Page 10
7. Connect supplied 3/8" water line between
water supply and water inlet fitting (Fig. 11.1).
8. Using supplied 3/4" drain tubing and barbed
fittings, connect 3/4" barbed drain elbow tting
on dispenser to 3/4" FNPT drain (Fig. 11.2).
9. Route power cord through utility access hole
to power supply (Fig. 11.3).
10. Turn on water supply and check for leaks.
Fig. 11 – Dispenser bottom view
1
11. Install bottom panel (Fig. 12). Fig. 12
3
2
10 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 11
User information
How the dispenser works
Follett’s 25/50CI series automatic-load ice and water dispensers are equipped with Follett’s 425 lb (181kg)/day
ice machine. In the continuous icemaking process, water freezes to the inside wall of the evaporator. A rotating
stainless steel auger carries the ice to the top of the evaporator where it is compressed and extruded through an
outlet port. The ice is then pushed through a tube to the storage hopper. When the hopper is full, a bin thermostat
opens and shuts the ice machine off. When the dispense mechanism is activated, a dispense motor is turned on,
causing the wheel to turn. This moves ice to the dispense chute where it drops by gravity into the container held
below the chute.
How SensorSAFE infrared dispensing works
Follett’s SensorSAFE infrared dispensing maximizes sanitation and minimizes the possibility of cross-contamination
by eliminating physical contact between the cup or container and dispenser. Sensors in the panel use reected
infrared light to detect the presence of the container and send a signal to a control board which then activates the
appropriate components for ice or water dispensing.
The SensorSAFE infrared dispensing package includes a cleaning switch under the left side of the front cover
which temporarily shuts off dispensing to allow cleaning of the panel and lenses. If the switch is not turned back on
after cleaning, the dispenser automatically resets after two minutes for normal operation.
SensorSAFE infrared dispensing also includes a time limit safety feature which automatically stops ice dispensing
after one minute of continuous dispensing. Dispensing can be resumed by moving the container away from the
dispenser and returning it to the activation zone.
Cleaning and sanitizing
Follett ice machines and dispensers, and their associated cleaning and sanitizing procedures, are designed for
use with potable water sources. The presence, or suspected presence, of infectious agents may call for additional
measures, including the replacement of components and more comprehensive disinfection measures. Follett
recommends that these cleaning and sanitizing procedures be reviewed with the appropriate infectious agent
subject matter experts to assure complete remediation.
Periodic cleaning of Follett’s ice and water dispenser and ice machine system is required to ensure peak
performance and delivery of clean, sanitary ice. The recommended cleaning procedures that follow should be
performed at least as frequently as recommended and more often if environmental conditions dictate.
Follett recommends sanitizing the pressurized water lines prior to cleaning the ice machine/dispenser. Follett
offers two kits: order P/N 01089572 when a Follett lter system with a pre-lter bowl is present, or P/N 01089580
when a Follett lter system is not present. Follow the instructions provided with the respective kits to sanitize the
pressurized water lines immediately before cleaning the ice machine/dispenser.
Cleaning of the condenser can usually be performed by facility personnel. Cleaning of the ice machine system
should be performed by your facility’s trained maintenance staff or a Follett authorized service agent. Regardless
of who performs the cleaning, it is the operator’s responsibility to see that this cleaning is performed according to
the schedule below. Service problems resulting from lack of preventive maintenance will not be covered under the
Follett warranty.
Recommended cleaning intervals*
Symphony PlusFrequency
Drain Lineweekly
Drain Pan/Drip Panweekly
Exterior, Water Station Tubeas needed
Condensermonthly (air-cooled only)
Dispenser and Componentssemi-annually
Ice Machinesemi-annually
Transport Tubesemi-annually
Ice Storage Area/Binsemi-annually
Pressurized Water Sanitizingsemi-annually
* Ice machine and dispenser must be cleaned prior to start-up.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 11
Page 12
Weekly
CAUTION!
§ Do not use solvents, abrasive cleaners, metal scrapers or sharp objects to clean any part of the dispenser.
Dispenser drain pan and drain line
§ Pour 1 gal. (3.8 L) of hot tap water into drain pan to ush drains.
11. Remove top bearing insulation. Loosen Phillips-head screw on nozzle connected to evaporator. Remove
nozzle from evaporator side only, leave other side of nozzle connected to transport tube.
12. Soak one SaniSponge in remaining SafeCLEAN Plus solution.
13. Insert the sponge soaked in cleaning solution into nozzle, then insert a dry sponge into the nozzle.
14. Replace nozzle onto evaporator and tighten screw. Ensure drain is connected to reservoir and vent tubes
are connected to evaporator drain pan. Replace top bearing insulation.
15. Turn ON bin signal switch. Wait for ice to push sponges through transport tube.
16. Collect sponges from ice storage bin.
1 7. Replace hopper lid, machine top, turn ON dispenser power and install front cover.
18. After 10 minutes, dispense all ice and discard.
[OPTIONAL] Finish cleaning – No-rinse sanitizing with Nu-Calgon IMS-III
19. Press CLEAN switch. The MAINTENANCE light will turn on and the machine will drain. Wait for the LOW
WATER light to turn on.
20. Remove lid from cleaning cup and ll (about 1 quart) until sanitizing solution completely lls the reservoir.
Place lid back on cup. Save remainder of sanitizing solution.
2 1. CLEANER FULL light will turn on and machine will start cleaning cycle then rinse three times; this
process takes approximately 15 minutes.
22. While ice machine is sanitizing, clean dispenser as follows:
a. Wipe inside of hopper lid, stud assembly, baffle, wheel, inside of storage area, dispense chutes, drain grille
and drain pan with damp cloth wrung out in sanitizing solution. Do not rinse off the sanitizing solution.
Note: To avoid possible damage to motor assembly, only use a damp cloth to clean storage hopper. Do not
allow water to run through motor shaft hole in bottom of hopper.
24. When machine is nished rinsing, the MAINTENANCE light will turn off.
25. Remove top bearing insulation. Loosen Phillips-head screw on nozzle connected to evaporator. Remove
nozzle from evaporator side only, leave other side of nozzle connected to transport tube.
26. Soak one SaniSponge in remaining sanitizing solution.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 13
Page 14
2 7. Insert the sponge soaked in sanitizing solution into nozzle then insert a dry sponge into the nozzle.
28. Replace nozzle onto evaporator and tighten screw. Ensure drain is connected to reservoir and vent tubes
are connected to evaporator drain pan. Replace top bearing insulation.
29. Turn ON bin signal switch. Wait for ice to push sponges through transport tube.
30. Collect sponges from ice storage bin.
3 1. Replace hopper lid, machine top, and install front cover.
32. After 10 minutes, dispense all ice and discard.
User Interface and Exterior Cabinet
§ Clean stainless steel panels with stainless steel cleaner.
14 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 15
Service
Ice machine Operation (all models)
Follett’s ice machine consists of four distinct functional systems:
§ Harvesting system
§ Water system
§ Electrical control system
§ Refrigeration system
These four systems work together to accomplish the production and harvesting of ice. A problem in any one of
these systems will result in improper operation of the entire ice production cycle. When troubleshooting the ice
machine, it is important to analyze the entire system operation to determine which system is not functioning
properly, then pinpoint the component within that system that is malfunctioning. Determine what corrective action
must be taken before making any adjustments or replacing any components.
The icemaking process
The Maestro Plus ice machine uses a stainless steel jacketed evaporator and operates on a continuous freezing
cycle. Water is supplied to the evaporator from the water reservoir where the water level is controlled by conductivity
probes.
When the ice machine is running, a layer of ice forms on the interior surface of the evaporator. This ice is
continuously removed by a slowly rotating (12RPM) auger. The auger carries the ice upward into the cavity
formed by the top bearing housing and the compression loop, where it is compressed to remove excess water.
When the ice reaches the desired hardness it rotates within the cavity and is forced through a discharge port
and compression nozzle and into the ice transport tube. The discharge tube and compression nozzle are slightly
restricted to further compress the ice and produce the desired hardness.
A solid state control board located in the electrical box of the ice machine controls the normal operation of the ice
machine and monitors gearmotor torque. This control board will shut down the ice machine should an over-torque
condition occur. It is very important that you familiarize yourself with the operational sequences detailed in this
manual before attempting to service the ice machine.
water
inlet
evaporator
port
ice transport tube
compression nozzle
auger
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 15
Page 16
Water system
The water level in the evaporator is controlled by a ll solenoid (Fig 13) and level detecting sensors. Water sensing
rods (Fig. 14) extend down into the reservoir at the end of the evaporator assembly. The system works via electrical
conductivity as follows:
One of the longest probes is a common. When water is between any of the other probes and the common, the
PC board will sense the activation. During normal operation, the water level rises and falls between the Normal
High and Normal Low sensors. As water is consumed to make ice, the level will fall until the Normal Low sensor is
exposed, triggering the water feed solenoid on. Water will ll until the Normal High sensor is activated.
Note: The potable water dissolved solids content must be greater than 10 ppm for the water control system to
function properly. If using reverse osmosis water ltration system, ensure T.D.S level is greater than 10 ppm.
Fig. 13 – Water system diagram
VENT
CLEANING CUP
RESERVOIR FILL
ICE
NOZZLE
SOLENOID
EVAPORATOR
DRAIN PAN
TO DRAIN CUP
Fig. 14 – Water level diagram
B COMMON
C HIGH
A ALARM LOW
D LOW
WATER
RESERVOIR
C
NORMAL OPERATING RANGE
D
WATER SUPPLY
3/8" FPT, 45-90 F (7-32 C)
10-70 PSI (69-483 KPA)
BA
16 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 17
Electrical box and control board
CAUTION!
§ Disconnect power to unit before putting hands or arms in storage area or attempting any repair or service to
equipment.
Fig. 15 – Electrical component locations
Top View
ice level
control stat
well nut
rubber
grommet
bin thermostat
capillary tube
ice tube
mounting bracket
knurled screw
Fig. 16 –
Control board dip switch settings
OFF POSITIONON POSITION
OFF ON
Sleep cycle
1 2 3 4 5 6 7 8
disabled
Not used
Sleep cycle
dispense duration
20 min. time delay
Flush disabled
Maint. timer ON
Sleep cycle dispense duration
OFF ON
1 2 3 4 5 6 7 8
Sleep cycle
enabled
Not used
Sleep cycle
dispense duration
60 min. time delay
Flush enabled
Maint. timer OFF
4 54 5
35 s
15 s
4 54 5
5 s
60 s
dispenser
electrical
box
icemaker
electrical
box
hopper
assembly
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 17
Page 18
Wiring diagram - Lever
98 BLACK
97 WHITE
100 BLACK
BINT-S TAT
98 BLACK
LEVER DISPENSERS
CONTROL BOX
48 WHITE
47 ORANGE
49 BLACK
895
9
8
44 RED
45 BLUE
46 PURPLE
423
7
6
765
4
99 BLACK
43 BLACK
GROUND
SCREW
44 RED
95 GREEN
94 WHITE
93 BLACK
42 WHITE
41 GREEN
1
3
2
1
POWER
1 2
TO ICE MACHINE BIN SIGNAL
(CONTACT CLOSURE)
1 2 3 4
WHITE
BLACK
GREEN
34 RED
35 BLUE
36 PURPLE
37 ORANGE
34 RED
35 BLUE
36 PURPLE
37 ORANGE
423
5
5
LEVER DISPENSERS
SPLASH PANEL
423
82 BLUE
83 PURPLE
84 RED
88 BLUE
87 WHITE
89 PURPLE
2
1
2
1
1
1
81 WHITE
86 WHITE
S
TO ICE MACHINE POWER
GROUND-GREEN
NEUTRAL-WHITE
115/1/60-BLACK
DISPENSE
92 PURPLE
MOTOR
M
91 WHITE
18 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 19
Wiring diagram - SensorSAFE
103 GREEN
L1
GND
TO
SPLASH
ICE
NEUTRAL
PANEL
WTR
CLN
WM
SOL
WTR
106 BLACK
105 WHITE
46 PURPLE
96 BLACK
44 RED
45 BLUE
98 BLACK
97 WHITE
48 WHITE
100 BLACK
BINT-S TAT
98 BLACK
49 BLACK
1 2
TO ICE MACHINE BIN SIGNAL
(CONTACT CLOSURE)
101 BLACK
SensorSAFE
DISPENSERS CON-
102 WHITE
TROL BOX
CLEAN
SWITCH
103 GREEN
105 WHITE
106 BLACK
48 WHITE
47 ORANGE
49 BLACK
857
9
9
8
37 ORANGE
44 RED
45 BLUE
46 PURPLE
423
6
4
765
34 RED
35 BLUE
36 PURPLE
99 BLACK
102 WHITE
42 WHITE
43 BLACK
41 GREEN
1
3
2
1
WHITE
BLACK
GREEN
POWER
96 BLACK
95 GREEN
94 WHITE
93 BLACK
SCREW
GROUND
TO ICE MACHINE POWER
1 2 3 4
TO
BOX
SensorSAFE
DISPENSERS
ICE SENSOR
SPLASH PANEL
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 19
34 RED
36 PURPLE
423
5
423
5
83 PURPLE
WATER SENSOR
92 PURPLE
35 BLUE
37 ORANGE
1
1
81 WHITE
82 BLUE
87 WHITE
2
1
2
1
DISPENSE
MOTOR
M
86 WHITE
S
91 WHITE
GROUND-GREEN
NEUTRAL-WHITE
115/1/60-BLACK
WATER
SOLENOID
Page 20
Ice machine operational and diagnostic sequences
The wiring diagrams that follow illustrate the circuitry of Follett ice machines used with 25/50 series ice dispensers.
Both normal operation (stages 1—8) and non-normal diagnostic sequences showing torque-out for use in
troubleshooting are shown.
Circuitry notes
§ Bin signal is contact closure only — DO NOT SUPPLY POWER.
Note: The operation stage descriptions that follow are based on the unit containing the split-phase gear
motor.
Normal operation – Stage 1
Power is supplied to L1 of the control board, the POWER LED light begins ashing. The ice level bin thermostat in
the dispenser is closed and calling for ice, supplying contact closure to the control board. The LOW BIN LED will be
on. The control board will now go through the start-up sequence. The board checks the water sensors (located in
the reservoir) for continuity between the common probe (B) and the high probe (C). If continuity is not sensed, the
water ll valve (P21) is energized.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
T.O.L.
RED
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Drain Clog Sensor
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Bin T-Stat
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
Ice Dispense Input
N
BLACK
P6
P21
P20
P19
P3
P22
P4
P15
HI PRS
1 2 3 4 5 6 7 8
WATER LEVELS
BIN
COMPRESSOR
RESET
P11
Clean Switch
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
20 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 21
Normal operation – Stage 2
When continuity is seen between B and C, the water valve de-energizes, the AUGER output (P4) comes on along
with the MAKING ICE LED. The auger gearmotor’s start windings are energized through a current style start relay
that is pulled in by the initial high current draw of the gearmotor.
PSC: Start winding
energized through
T.O.L.
RED
R
S
C
Compressor
Start
Relay
WHITE
Run
2
5
Compressor
Electrical Box
Start
1
Fan
WHITE
Ice Dispense Input
High
Pressure
Switch
capacitor.
Capacitor
YELLOW
NO CONNECT
OR
BLACK
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
Drain
Valve
Fill
Valve
Drain Clog Sensor
Bin T-Stat
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
P6
P21
P20
P19
P3
P22
N
BLACK
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
Clean Switch
POWER
LOW BIN
MAKING ICE
COMPRESSOR
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Normal operation – Stage 3
After the initial high current draw drops off, the gearmotor start relay contacts open, dropping out the start winding.
The condenser fan output (P3) comes on 0.5 seconds later.
PSC: Start
windings stay
energized.
Capacitor
YELLOW
BLACK
NO CONNECT
OR
T.O.L.
RED
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Drain Clog Sensor
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Bin T-Stat
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
L1
P6
P3
P22
AUGER
Ice Dispense Input
N
BLACK
P21
P20
P19
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
High
Pressure
Switch
COMPRESSOR
Clean Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 21
Page 22
Normal operation – Stage 4
One second (1 s) after the fan comes on, the COMPRESSOR output comes on. The compressor circuit uses both
run and start capacitors along with a potential start relay. The start capacitor in energized through the normally
closed contacts of the start relay.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
T.O.L.
RED
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Drain Clog Sensor
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Bin T-Stat
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
Ice Dispense Input
N
BLACK
P6
P21
P20
P19
P3
WATER LEVELS
P22
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
High
Pressure
Switch
COMPRESSOR
Clean Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Normal operation – Stage 5
As the compressor comes up to normal running speed, its start winding generates a voltage potential across the
relay’s coil. This energizes the coil to open the contact and drop out the start capacitor.
The ice machine is now in a normal ice making mode. The ice machine will produce ice until the bin level control in
the ice dispenser is satised.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
Start
Relay
3
R
C
A B C D
T.O.L.
RED
4
2
BLACK YELLOW
S
Gearmotor
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
AUGER
L1
P6
P21
P20
P19
P3
P22
Ice Dispense Input
N
P15
BLACK
HI PRS
WATER LEVELS
P4
1 2 3 4 5 6 7 8
RESET
BIN
COMPRESSOR
P11
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Bin T-Stat
Water Sensors
Drain Clog Sensor
22 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Clean Switch
Page 23
Normal operation – Stage 6
Once the bin thermostat control opens, the LOW BIN LED goes out. The compressor and gear motor outputs turn
off, the MAKING ICE LED goes out and the TIME DELAY LED comes on. .
Capacitor
YELLOW
NO CONNECT
BLACK
OR
Start
Relay
3
R
T.O.L.
RED
4
2
BLACK YELLOW
S
C
Gearmotor
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
AUGER
L1
P6
P21
P20
P19
P3
P22
Ice Dispense Input
N
P15
BLACK
HI PRS
WATER LEVELS
P4
1 2 3 4 5 6 7 8
RESET
BIN
COMPRESSOR
P11
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
A B C D
Clean Switch
Water Sensors
Drain Clog Sensor
Bin T-Stat
Normal operation – Stage 7
The fan motor continues for 10 minutes before shutting off. The TIME DELAY LED remains on for 20 minutes.
The ice machine will not start while the TIME DELAY LED is on. To restart the ice machine for troubleshooting
purposes, depress the reset button to clear the control board.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
T.O.L.
RED
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Drain Clog Sensor
Run
2
5
Compressor
Electrical Box
Fill
Valve
1
Start
Bin T-Stat
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
Ice Dispense Input
N
BLACK
P6
P21
P20
P19
P3
P22
P4
P15
HI PRS
1 2 3 4 5 6 7 8
WATER LEVELS
BIN
COMPRESSOR
RESET
P11
Clean Switch
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 23
Page 24
Normal operation – Stage 8
When the dwell time of 20 minutes has expired, the TIME DELAY LED goes off. If 5 seconds of ice has been
dispensed and the SLEEP CYCLE LED (Symphony Plus only) is off, the ice machine will go through the normal
start-up sequence when the bin level control signals the control board for ice.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
T.O.L.
RED
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Drain Clog Sensor
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Bin T-Stat
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
L1
P6
P21
P20
P19
P3
P22
AUGER
Ice Dispense Input
N
P15
BLACK
HI PRS
WATER LEVELS
P4
1 2 3 4 5 6 7 8
RESET
P11
BIN
High
Pressure
Switch
COMPRESSOR
Clean Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Quiet Night/Sleep cycle (Symphony Plus only)
The board monitors ice dispensing through a line voltage input to P15. If the ice dispense has not be initiated for
more than 5 seconds during the 20 minute time delay, the SLEEP CYCLE LED comes on. The machine will stay off
for 12 hours unless 5 seconds of dispensing is seen. After 12 hours, the SLEEP CYCLE LED goes out and the ice
making will resume if the bin thermostat is closed. The sleep cycle dispense duration is adjustable using the DIP
switches on the control board.
24 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 25
Self-ushing (when enabled)
T.O.L.
High
Drain Clog Sensor
At the completion of the 20 minute time delay, the machine checks for a cumulative one hour of ice making time
since the last off-cycle ush. If the cumulative ice making time exceeds one hour, the machine will energize the
drain valve P19 for 60 seconds to drain the evaporator. It will then rell with water, ush again, rell and begin
making ice if the LOW BIN LED is on. If the ice making time is less than 1 hour, the machine will start and begin
making ice without draining the evaporator.
RED
R
S
C
Compressor
Start
Relay
WHITE
Run
2
5
Compressor
Electrical Box
Start
1
Fan
WHITE
Ice Dispense Input
Pressure
Switch
Capacitor
YELLOW
NO CONNECT
BLACK
OR
Start
Relay
3
R
A B C D
4
2
BLACK YELLOW
S
C
Gearmotor
Drain
Valve
Fill
Valve
Bin T-Stat
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
P6
P21
P20
P19
P3
P22
N
BLACK
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
Clean Switch
POWER
LOW BIN
MAKING ICE
COMPRESSOR
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Diagnostic Stages
High gearmotor amps – Stage 1
The HI AMPS error and TIME DELAY LEDs are on indicating that the control board has sensed an over-torque
condition at the P4 terminal (more than 3 amps from the gearmotor) or no current draw (0A) and shut the ice
machine down (strike one). The HI AMPS and TIME DELAY LEDs will remain on for 60 minutes after an over-
torque condition has occurred. The ice machine will remain off as long as these two LEDs are on. After the 60
minute time delay, these LED lights turn off, and the control board will try to go through a normal start-up sequence.
T.O.L.
RED
R
S
C
Compressor
Start
Relay
WHITE
Run
2
5
Compressor
Electrical Box
Start
1
Fan
WHITE
Ice Dispense Input
High
Pressure
Switch
Capacitor
YELLOW
NO CONNECT
BLACK
OR
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
Drain
Valve
Fill
Valve
Drain Clog Sensor
POWER
LOW BIN
MAKING ICE
COMPRESSOR
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Bin T-Stat
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
P6
P21
P20
P19
P3
P22
N
BLACK
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
Clean Switch
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 25
Page 26
High gearmotor amps – Stage 2
If the restart is successful the board will continue to monitor the current draw on P4 for 60 minutes looking for
a second high amps (above 3A) occurrence. If the ice machine runs without problems for 60 minutes and no
additional torque errors occur, the ice machine will continue normal operation.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
Start
Relay
T.O.L.
RED
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
AUGER
L1
P6
P21
P20
P19
P3
P22
Ice Dispense Input
N
P15
BLACK
HI PRS
WATER LEVELS
P4
1 2 3 4 5 6 7 8
RESET
BIN
COMPRESSOR
P11
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
A B C D
Clean Switch
Water Sensors
Drain Clog Sensor
Bin T-Stat
High gearmotor amps – Stage 3
If a second occurrence happens during the 60 minute monitoring period, the HI AMPS LED will come on again
and shut the machine down (strike two). The HI AMPS LED (wihout the TIME DELAY LED) will indicate to the
technician that two consecutive over-torque situations have occurred. The ice machine is shut down at this time and
locked out. It will not restart unless the manual reset button is depressed while power is on.
T.O.L.
RED
R
S
C
Compressor
Start
Relay
WHITE
Run
2
5
Compressor
Electrical Box
Start
1
Fan
WHITE
Ice Dispense Input
High
Pressure
Switch
Capacitor
Start
Relay
4
Drain
Valve
Fill
Valve
N
L1
OR
2
YELLOW
NO CONNECT
BLACK
3
BLACK YELLOW
R
S
C
Gearmotor
RED
BROWN
BLACK
BLUE
A B C D
Bin T-Stat
Water Sensors
Drain Clog Sensor
26 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
L1
P6
P21
P20
P19
P3
P22
AUGER
N
BLACK
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
COMPRESSOR
Clean Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Page 27
Loss of water
During operation, the water level cycles between the normal low (D) and normal high (C) water probes - the ll
valve (P21) cycling on and off. If continuity is not detected between the common probe (B) and normal low (D)
within 10 seconds, the LOW WATER and TIME DELAY LEDs will come on and the machine will shut down for
the one hour time delay period. After the time delay, the ll valve will re-energize and wait for continuity between
the common probe and normal high before restarting. LOW WATER LED will remain ON until the water level is
satised.
Capacitor
YELLOW
NO CONNECT
BLACK
OR
T.O.L.
RED
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
A B C D
Water Sensors
R
S
C
Compressor
Start
Relay
WHITE
Drain
Valve
Drain Clog Sensor
Run
2
5
Compressor
Electrical Box
Fill
Valve
Start
1
Bin T-Stat
Fan
WHITE
N
L1
RED
BROWN
BLACK
BLUE
L1
AUGER
Ice Dispense Input
N
BLACK
P6
P21
P20
P19
P3
P22
P4
P15
HI PRS
1 2 3 4 5 6 7 8
WATER LEVELS
BIN
COMPRESSOR
RESET
P11
Clean Switch
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 27
Page 28
High refrigerant pressure
Should the refrigeration pressure rise above 425 psi, the high pressure switch contacts will open. The board sees
the open circuit and the HIGH PRESSURE and TIME DELAY LEDs will come on, the machine shuts down. After
the one hour time delay, the machine will attempt to restart. If the pressure has fallen below the reset point of 295
psi and the board see the contacts closed, the machine will resume normal operation. If the contacts are still open
after the restart, the board will again go into HIGH PRESSURE and TIME DELAY, cycling until contact closure is
seen.
T.O.L.
RED
R
S
C
Compressor
Start
Relay
WHITE
Run
2
5
Compressor
Electrical Box
Start
1
Fan
WHITE
Ice Dispense Input
High
Pressure
Switch
Capacitor
YELLOW
NO CONNECT
BLACK
OR
Start
Relay
4
2
3
BLACK YELLOW
R
S
C
Gearmotor
Drain
Valve
Fill
Valve
N
L1
RED
BROWN
BLACK
BLUE
L1
P6
P3
P22
AUGER
P21
P20
P19
N
BLACK
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
POWER
LOW BIN
MAKING ICE
COMPRESSOR
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
A B C D
Clean Switch
Water Sensors
Drain Clog Sensor
Bin T-Stat
Drain clog
If continuity is seen between the two drain clog sensor probes, the DRAIN CLOG LED will come on and the
machine will shut down. The machine will not restart unless the manual reset button is depressed while power is on.
T.O.L.
RED
R
S
C
Compressor
Start
Relay
WHITE
Run
2
5
Compressor
Electrical Box
Start
1
Fan
WHITE
Ice Dispense Input
High
Pressure
Switch
Capacitor
Start
Relay
4
Drain
Valve
Fill
Valve
N
L1
OR
2
YELLOW
NO CONNECT
BLACK
3
BLACK YELLOW
R
S
C
Gearmotor
RED
BROWN
BLACK
BLUE
A B C D
Bin T-Stat
Water Sensors
Drain Clog Sensor
28 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
L1
P6
P3
P22
AUGER
P21
P20
P19
N
BLACK
WATER LEVELS
P4
P15
HI PRS
1 2 3 4 5 6 7 8
RESET
P11
BIN
COMPRESSOR
Clean Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
Page 29
Electrical control system schematic
L1
L2/N
GND
DISP
BIN
CONTACT
CLOSURE
WHITE #52
RED #54
BLACK #51
ORANGE #55
BLACK #56
GREEN #53
1 2 3 4 5 6 7 8 9
WHITE #62
WHITE #64
BLACK #61
BLACK #65
BLACK #66
GREEN #63
GREEN #67
2
5
6
1
4
C1 RUN
BLACK #66
BLACK #69
BLACK #68
BLACK #69
BLACK #26
WHITE #25
GRN-YEL #24
BLACK #23
GREEN #57
BLACK #58
BLACK #59
COMPRESSOR
ELECTRICAL
BLACK #71
BOX
O.L.
C2 START
COMPRESSOR
BLACK #23
P2
NNN NNNN NN
BLACK #01
L1L1L1
P1
P6
P21
P20
P19
P3
P22
RED #16
WHITE #121
WHITE #13
BROWN #14
BLACK #122
WHITE
#15
FEED VALVE
#04
#05
FAN
DRAIN VALVE
BLUE #07
BLUE
BLACK
WHITE
START
RELAY
4
2
BLACK
YELLOW
3
CAPACITOR
BLACK
YELLOW
START
BLACK #51
WHITE #52
GREEN #53
C
S
R
BLACK
COMP.
SPLIT-PHASE
START
RUN
RUN
D17
T.O.L.
PSC MOTOR
T.O.L.
D19D22D21D20
CURRENT SENS
D48
OR
BLUE
T2
K3
AUGER
WATER SENSOR
D18
P4
DRAIN CLOG
SENSOR
RESERVOIR
D37
P5
GRN #17
A B C D
ICE AUX WATER AUX
T1
P15
P17
WATER LEVELS
BINRS485
P12
P18
VIOLET
BLACK
RED
ORANGE
YELLOW
P16
HI PRS
P14
P10
SERIAL COMM
P11
P17
WATER LEVELS
BLACK
BLACK #51
S2
P13
P12
P14
D16
BIN
HI PRS
HIGH
PRESS
P
MODEL SELECT
P9
6
2
1
PROGRAM
RESET
RS485 UI
P7
P8
P11
CLEAN SAFE
K1
5
COMPRESSOR
S1
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
MAINTENANCE
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
MAINT.
CLEAN
Refrigeration cycle
high side
service port
thermostatic
expansion
valve
condenser
filter dryer
evaporator
high
pressure
vapor
high pressure
switch
high
pressure
liquid
low side service port
compressor
low
pressure
liquid
low
pressure
vapor
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 29
Page 30
Air-Cooled ice machine capacity/24hrs.
Ambient Air Temperature F/C
F60708090100
C1621273238
50460425390355320lbs.
10208193177161145kg.
60437.5405372.5340307.5 lbs.
16198184169154139kg.
70415385355325295lbs.
21188175161147134kg.
80405375345315285lbs.
27184170156142129kg.
90395365335305275lbs.
Inlet Water Temperature F/C
32179166152138125kg.
Water-Cooled ice machine capacity/24hrs.
Condenser Water Temperature F/C
F5060708090100
C101621273238
50486465443422 400 389lbs.
10220211201191181176kg.
60464445425406 386 367lbs.
16210202193184175166kg.
70443425408390 372 358lbs.
21201193185177169162kg.
80422406389373 356 340lbs.
27191184176169161154kg.
90400385371356 341 326lbs.
Inlet Water Temperature F/C
32181175168161155148kg.
Water-Cooled ice machine refrigeration pressure
Discharge pressure/suction pressure
Condenser Water Temperature F/C
F/C50/1070/2190/32
50/10280/27285/29290/31psi
70/21280/27285/29290/31psi
90/32280/27285/29290/31psi
Inlet Water Temperature F/C
Ice capacity test
Ice machine production capacity can only be determined by weighing ice produced in a specic time period.
1. Remove top panel and hopper lid of unit.
2. Weigh and record weight of container used to catch ice.
3. Run ice machine for at least 15 minutes.
4. Catch ice for 15 or 20 minutes.
5. Weigh harvested ice and record total weight.
6. Subtract weight of container from total weight.
7. Convert fractions of pounds to decimal equivalents (Ex. 6 lbs 8 oz = 6.5 lbs).
8. Calculate production using following formula:
1440 min. x wt. of ice produced
= Production capacity/24 hr. period
Total test time in minutes
9. Calculated amount per 24 hours should be checked against rated capacity for same ambient and
water temperatures in Ice Production Table (see page 23).
30 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 31
Compressor data
Compressor current draw
Air-cooled
Ambient air temp.60 F/15.6 C70 F/21.1 C80 F/26.7 C90 F/32.2 C100 F/37.8 C
Important: All service on refrigeration system must be performed in accordance with all federal, state and local
laws that pertain to the use of refrigerants. It is the responsibility of the technician to ensure that these requirements
are met.
ModelChargeRefrigerant type
25/50CI425A, 25/50HI425A (air-cooled)15 ozR404A
25/50CI425W (water-cooled)9 ozR404A
CAUTION!
§ Recharging of unit at other than factory specications will void ice machine warranty.
Refrigerant replacement requirements
1. Non-contaminated refrigerant removed from any Follett refrigeration system can be recycled and returned
to the same system after completing repairs. Recycled refrigerant must be stored in a clean, approved
storage container. If additional refrigerant is required, virgin or reclaimed refrigerant that meets ARI
standard 700-88 must be used.
2. In the event of system contamination (for example, a compressor burn out, refrigerant leak, presence of
non-condensibles or moisture), the system must be repaired, evacuated and recharged using virgin or
reclaimed refrigerant that meets ARI standard 700-88.
3. Follett Corporation does not approve of recovered refrigerants. Improper refrigeration servicing
procedures will void the factory warranty.
Evacuation
Evacuate the system to a level of 500 microns. When the 500 micron level is reached, close valves and both
manifold and shut down the vacuum pump. Allow the system to sit for approximately 20 minutes. During this period
the system pressure should not rise. If the system pressure rises and stabilizes there is moisture in the system and
further evacuation is needed. If the pressure continues to rise check the system for leaks.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 31
Page 32
Dispenser troubleshooting
CAUTION!
§ Disconnect power to unit before putting hands or arms in storage area or attempting any repair or service to
equipment.
Before calling for service
1. Check that no ice is in the dispenser bin area.
2. Check that congealed ice is not causing a jam.
3. Check that all switches and circuit breakers are on.
4. Check that all drains are clear.
5. Check that water is supplied.
Lever model troubleshooting guide
ProblemIndicatorsCorrective Action
Does not dispense ice.1. Power switch off or faulty.
2. Faulty dispense switch.
3. Wheel motor malfunction.
Dispense wheel rotates
continuously.
Ice machine runs continuously.Faulty or incorrectly positioned
Does not dispense water.1. Faulty water solenoid valve.
Dispense switch contacts are
burned out.
bin stat.
2. Faulty dispense switch.
3. Power switch off or faulty.
1. Check switch – turn on or replace if
faulty.
2. Replace switch.
3. Check motor and replace
Replace dispense switch.
Check for proper positioning. If stat does
not open when ice is placed on capillary
tube, replace stat.
1. Replace water solenoid valve.
2. Replace dispense switch.
3. Check switch - turn on or replace if faulty.
SensorSAFE model troubleshooting guide
SensorSAFE Board LED
Status
ProblemAction
Does not
dispense ice
and/or water.
Dispenses ice
and/or water
continuously.
Check
LEDs on the
SensorSAFE
control board.
Place cup
under drop
zone (in front
of lens)
Check LEDs
on control
board.
OFFOFFOFFCheck circuit breakers and power switch.
ONONOFFPress clean switch on lower left side of electrical
ONOFFOFFTroubleshoot appropriate lens/sensor and
ONOFFONVerify power on appropriate output terminal
ONOFFONTroubleshoot appropriate lens/sensor and
ONOFFOFFIf there is power on any output terminal (WTR or
ICE/
WTR
Corrective ActionPWRCLN
Restore power or replace defective switch.
enclosure to return board to normal operation.
replace if required.
(WTR or WM) on control board and replace
board if required. If board tests okay,
troubleshoot appropriate dispenser component.
replace if required.
WM) on control board, replace board.
32 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 33
SensorSafe Board guide
Fig. 17
LEDs, when illuminated, indicate the following: PWR
(board power), CLN (clean button pressed WTR and
Not shownHopper, assembly, 25 series00953281
Not shownHopper, assembly, 50 series00953299
Not shownDrain tube, ice storage hopper01054576
Not shownDrain pan protector00195974
Not shownWall mount bracket and cover plate00902080
Not shownGrille, drain pan, gray plastic, case of 1201071232
6Bearing assembly, bottom (includes O rings and condensate shield)502738
7O ring, bearing housing 500496
8O ring, mounting base501063
9Shield, condensate500744
10 Screw, Allen 1/4 20 x 1/2 (set of 4)501080
11Mounting base, evap. (includes 501063)502733
12Bolt, mounting base502227
13Gearbox & motor502730
Not shownMounting base, gearbox01067693
15Compression nozzle, with single drain01064674
16Drain pan, evaporator00181990
17Tube, compression nozzle vent01148691
18Tube, compression nozzle, single drain01148675
Not shownGrease, Mobile FM222, 14 oz501111
19Bracket, vent hoses01007087
20Insulation jacket, evaporator01049592
21Relay, gearmotor00142042
22Cover, black plastic01012228
23O ring, top bearing01064963
24Insulation, top bearing01049600
25Insulation, compression nozzle, single drain01049584
2616 µF Capacitor (for PSC motor only)01103142
27Screw, compression nozzle00956250
28Cover, aluminum01106376
29Sensor, overow01039783
Not shownO-ring, compression nozzle00988097
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 51
Page 52
Ice machine electrical components
1
3
4
Reference #DescriptionPart #
1Capacitor, run00997759
2Relay start, compressor, 115 V, 60 Hz00997726
3Board, control circuit, 115 V, 60 Hz01064708
4Switch, clean 01229418
Not shownBin thermostat (MCD425A/WBT, MCD425A/WHT, MFD425A/WBT and
MFD425A/WHT only)
Not shownBoard, stand off control (8 required)00903005
Not shownRelay, power to contact closure01020734
Not shownJumper, bin signal01069095
2
500514
52 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 53
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 53
Page 54
54 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Page 55
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 55
Page 56
Warranty Registration and Equipment Evaluation
Thank you for purchasing Follett ® equipment. Our goal is to deliver high value products and services that earn your complete
satisfaction by delivering high-value products and services backed by outstanding customer and technical support.
Please review the installation instructions thoroughly. It is important that the installation be performed to factory specications so
your equipment operates at its maximum efficiency.
Follett LLC will not be liable for any consequential damages, expenses, connecting or disconnecting charges, or any losses
resulting from a defect of the machine. For full warranty details, visit our website www.follettice.com/productwarranties.
Registering your equipments helps Follett track your equipment's service history should you need to contact us for technical
support, and your feedback helps us improve our products and services. Please visit www.follettice.com/support to complete the
Warranty Registration form.
Should you have any questions, please contact Follett's technical support group at (877) 612-5086 or (610) 252-7301 and we will
be happy to assist you.
Calgon is a licensed trademark distributed by Nu-Calgon, in the United States.
Dow Corning is a registered trademark of Dow Corning Corporation in the United States and other countries.
SafeCLEAN, SaniSponge, SensorSAFE, and Symphony Plus are trademarks of Follett LLC.
Follett is a registered trademarks of Follett LLC, registered in US.
801 Church Lane • Easton, PA 18040, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com