Following installation, please forward this manual
to the appropriate operations person.
801 Church Lane • Easton, PA 18040, USA
Toll free (800) 523-9361 • (610) 252-7301
Fax (610) 250-0696 • www.follettice.com
00171587R00
Page 2
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 within 30 days after shipment.
3. Follett receives the equipment at the factory in Easton, PA within 30 days after issuance 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.
2
Page 3
Table of contents
Welcome to Follett Corporation
Specifications
Operation
Cleaning
Weekly exterior care
Monthly condenser cleaning
Semi-annual evaporator cleaning
Service
Icemaker operation
Water system
Electrical system
Normal control board operation
Test points
Time delay and self flushing jumpers
Error faults
Hard error
Soft errors
Relay output indication
Compressor/refrigerant solenoid output
Wiring diagram
Compressor data
Gearmotor data
Resistance of windings
Mechanical system
Evaporator disassembly
Evaporator reassembly
Refrigeration system
Refrigeration pressure data
Refrigeration system diagram
Refrigerant charge size
Refrigerant replacement requirements
Evacuation
Ambients
Ice capacity test
Bin full detection system
Troubleshooting
Replacement parts
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 the same degree of service, we ask
that you review the installation manual (provided as a separate document) before beginning to install the unit.
Our instructions are designed to help you achieve a trouble-free installation. Should you have any questions or
require technical help at any time, please call our technical service group at (800) 523-936 or (610) 252-7301.
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 equipment. Following is an explanation of the different model numbers in the
1400 series.
Horizon Series Icemaker Model Number Configurations
AVSC1400HC
IcemakerVoltageSeriesCondenser
HC Horizon
Chewblet
† Ice Manager Diverter Valve Systems can be used to fill any two of these bins or dispensers with a single ice machine.
Chewblet is a registered trademark of Follett Corporation, registered in the US.
C 208-230/60/1
®
(self-contained only)
D Low side 115/60/1
Condensing unit
208-230/60/1
(remote condensing only)
E 230/50/1
(self-contained only)
1000 up to
1036 lbs
(471kg)
1400 up to
1450 lbs
(658kg)
A Air-cooled, self-contained
W Water-cooled, self-contained
R Air-cooled, remote condensing unit
N Air-cooled, no condensing unit for
connection to parallel rack system
ApplicationConfiguration
V Vision™
H Harmony™
B Ice storage
bin
J Drop-in
M Ice Manager
diverter valve
system
S Satellite-fill™
T Top-mount
†
CAUTION
• Warranty does not cover exterior or outside installations.
• Moving parts. Do not operate with front cover removed.
• Hot parts. Do not operate with cover removed.
• To reduce risk of shock, disconnect power before servicing.
• Most ice machine cleaners contain citric or phosphoric acid, which can cause skin irritation. Read caution
label on product and follow instructions carefully.
• 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.
4
Page 5
Specifications
Electrical
Each icemaker requires its own separate circuit with electrical disconnect within 10 ft (6m).
Equipment ground required.
Standard electrical – 208-230/60/1
Maximum icemaker fuse – 20 amps each
Amperage – 12 amps
6 ft (2m) NEMA 6-20 cord and plug provided on icemaker
Notes: 3/4" vented drain line must slope a minimum of 1/4" per foot (6mm per 30.4cm run).
Drain to be hard piped and insulated.
To prevent back flow, do not connect drains.
Separate drains for icemaker and condenser.
Water shut-off recommended within 10 feet (3m).
Follett recommends installation of a Follett water filter system (part# 00130286) in icemaker inlet
water line.
Ambient
Air temperature 100˚F/38˚C max. 50˚F/10˚C min.
Water temperature 90˚F/32˚C max. 45˚F/7˚C min.
Water pressure – potable 70 psi max. (483 kPa) 10 psi min. (69 kPa)
Note: Do not use bleach to sanitize or clean the icemaker.
Preventive maintenance
Periodic cleaning of Follett’s icemaker 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.
Cleaning of the condenser can usually be performed by facility personnel. Cleaning of the icemaker system,
in most cases, should be performed by your facility’s 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.
Weekly exterior care
The exterior may be cleaned with a stainless cleaner such as 3M Stainless Steel Cleaner & Polish or equivalent.
1. Use a vacuum cleaner or stiff brush to carefully clean condenser coils of air-cooled icemakers to ensure
optimal performance.
2. When reinstalling counter panels in front of remote icemakers, be sure that ventilation louvers line up with
condenser air duct.
Semi-annual evaporator cleaning (every 6 months)
WARNING
• Wear rubber gloves and safety goggles (and/or face shield) when handling ice machine cleaner or sanitizer.
CAUTION
• Use only Follett approved SafeCLEAN™ Cleaner (part #00132001) and NU-CALGON IMS-II SANITIZER.
• Do not mix Cleaner and Sanitizer solutions together.
• DO NOT USE BLEACH.
• It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
• Read and understand all labels printed on packaging before use.
Note: Complete procedure for cleaning an sanitizing MUST be followed. Ice must be collected for 10
minutes before putting ice machine back into service.
1. To clean – Remove cover. Press the CLEAN
button. The machine will drain. Wait for the LO
WATER light to come on (Fig. 1).
Note: For Ice Manager diverter valve
application, refer to manual #00169045 for
icemaker and diverter valve cleaning process.
Fig. 1
LO WATER
C
L
E
A
N
7
Page 8
2. Mix 1 gallon (3.8L) 120˚F (49˚C) water and
7 ounces (198g) (one 7 ounce packet of Follett
SafeCLEAN ice machine cleaner, part#-00132001).
Locate cleaning cup. Fill until HI WATER light
comes on (Fig. 2).
Note: Do not use bleach to sanitize or clean the
icemaker.
3. Replace cover on cleaning cup. Wait until machine
restarts. Machine will clean, then flush 3 times in
approximately 12 minutes (Fig. 3).
Fig. 2
HI WATER
Fig. 3
4. To sanitize – Press CLEAN button. The machine
will drain. Wait for LO WATER light to come on
(Fig. 4).
Fig. 4
12
LO WATER
C
L
E
A
N
8
Page 9
5. Mix 1 gallon 120˚F (49˚C) water and 1.6 ounces
(48ml) NU-CALGON IMS-II SANITIZER. Fill until
HI WATER light comes on (Fig. 5).
Note: Do not use bleach to sanitize or clean the
icemaker.
6. Replace cover on cleaning cup. Wait until machine
restarts. Machine will sanitize, then flush 3 times in
approximately 12 minutes (Fig. 6).
Fig. 5
HI WATER
Fig. 6
7. To clean transport tube – Press power switch OFF
(Fig. 7).
12
Fig. 7
9
Page 10
8. Disconnect coupling as shown (Fig. 8).
9. Using disposable food service grade gloves,
insert dry Sani-Sponge™ (kit part# 00132068).
Next,-insert Sani-Sponge soaked in Nu-Calgon
IMS-II sanitizer solution. Push both Sani-Sponges
down ice transport tube with supplied pusher tube
(Fig. 9).
Fig. 8
Fig. 9
1
16"
(407mm)
10. Remove and discard 16" (407mm) pusher tube
(Fig. 10).
2
3
Fig. 10
10
Page 11
11. Reconnect coupling. Press power switch ON. Ice
pushes Sani-Sponges through tube (Fig. 11).
12. Place a sanitary (2 gallon or larger) container in
bin or dispenser to collect Sani-Sponges and ice
for 10 minutes. Collect 5.5 lbs of ice from unit.
Discard ice and Sani-Sponges (Fig. 12).
Fig. 11
Fig. 12
11
Page 12
Service
Icemaker operation (all models)
Follett’s icemaker consists of five distinct functional systems covered in detail as follows:
• Water system
• Electrical control system
• Mechanical assembly
• Refrigeration system
• Bin full
The Horizon icemaker overview
The Follett Horizon icemaker uses a horizontal, cylindrical evaporator to freeze water on its inner surface. The
refrigeration cycle is continuous; there is no batch cycle. The evaporator is flooded with water and the level is
controlled by sensors in a reservoir. A rotating auger (22 RPM) continuously scrapes ice from the inner wall of the
evaporator. The auger moves harvested ice through the evaporator into an ice extrusion canal. The ice is forced
through a restrictive nozzle that squeezes out the water and creates the Chewblet. The continuous extrusion process
pushes the Chewblets through a transport tube into a dispenser or bin.
A solid state PC board controls and monitors the functionality of the ice machine. In addition to sequencing electrical
components, the board monitors various operational parameters. A full complement of indicator lights allows visual
status of the machine's operation. Additionally, the PC board controls the self-flushing feature of the icemaker. The
evaporator water is periodically drained and replenished to remove minerals and sediment.
A unique “bin full” detection system is incorporated in the Horizon icemaker. A switch located at the ice discharge
port of the machine detects the position of the transport tube. When the bin fills up with ice, the transport tube
moves out of the normal running position, and the switch turns the ice maker off. A domed housing at the end of the
transport tube contains the ice extrusion loads during shut down.
Harvest system diagram
ice
transport
tube
water
inlet
compression
nozzle
auger
12
Page 13
Water system
The water level in the evaporator is controlled by a feed solenoid and level detecting sensors. Referencing the
diagram below, water sensing rods 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 fill 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 filtration system, ensure T.D.S level is greater than 10 ppm.
Water system diagram
Water level diagram
Normal
operating
range
Normal LO
Alarm LO
Common
13
Normal HI
Page 14
Electrical system
Normal control board operation
The PC board indicator lights provide all the information necessary to determine the machine's status. Green
indicator lights generally represent “go” or normal operation; Yellow indicators represent normal off conditions;
Red indicators generally represent alarm conditions, some of which will lock the machine off.
A green light labeled POWER indicates power to the machine. A flashing green light labeled CPU is normal and
indicates that the Central Processing Unit “heart beat” is working. All other normal operation status indicators are
covered as follows:
Ice machine disposition Operating conditions
Legend:
ONOFF
ON or OFFFLASHING
1. Ice machine is making ice.
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
2. Ice machine is not making ice.
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
3. Ice machine is not making ice.
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
POWER
LOW BIN
POWER
LOW BIN
POWER
LOW BIN
1. Normal running.
2. Normal time delay. When the bin fills with ice, the LOW BIN
light goes out and the refrigeration and auger drive systems
immediately shut down. (Note: The fan motor will continue to
run for 10 minutes to cool condenser) The TIME DELAY light
comes on, initiating the time delay period. When the time delay
expires, the machine will restart provided that the LOW BIN
light is on.
3. Normal purge indicator. After a selected period of ice
making time has elapsed (1 or 2 hours), the ice machine will
automatically self-flush. The compressor will shut down but
the fan and gearmotor will continue to run. After the flush is
complete the machine will refill and start without a time delay.
14
Page 15
Test points:
The Horizon PC board incorporates on-board test points that can be used to determine various electrical
outputs. The test point holes allow a standard probe to be inserted for quick voltage measurement. For 208-230
systems, use TP-4 (L2) as the common for testing outputs for solenoids, motors, etc.
Error faults:
The Horizon PC board monitors various operating parameters including high pressure, auger gearmotor
amperage limits, clogged drain, and high and low water alarm conditions. There are two types of errors namely
“hard” or “soft”. A hard error is one that shuts the machine off and will not allow restart until the reset button is
pressed. Even cycling power will not reset a hard error. A soft error can either be automatically reset should the
condition rectify, or if power is cycled. Should an error occur, consult the troubleshooting guide in this manual or
a Follett service technician. Note: there are two types of LO WATER and HI AMPS errors as listed below.
Soft errors:
HI AMPS: The PC board monitors the amperage of the auger motor. Should the gear motor experience current
draw above the 3.8 amps limit the machine will shut down and the TIME DELAY, HI AMP, and SERVICE LED’s
will be illuminated. After the time delay the machine will restart and the TIME DELAY, HI AMP, and SERVICE
LED’s will clear.
LO WATER: During operation, the water level cycles between the normal low and normal high sensors. Should
the water be shut off to a running machine, a soft error will occur. The error sequence is as follows: During
operation, the water level falls to the normal low sensor, and when it does the water feed solenoid is energized. If
water is not detected at the normal low sensor within 120 seconds, a soft error will occur. The machine will shut
down, but the water feed solenoid will remain energized. Should water return, it will fill to the normal low sensor
and the machine will resume normal operation. The error will clear automatically.
DRAIN CLOG: The drain clog sensor, located in the plastic drain pan behind the drain solenoid, will detect the
presence of water just below the top edge of the pan. If water does not properly flow out of the drain pan it will
rise to the sensor, especially during a self-flushing purge cycle.
Hard error:
HI AMPS:
1. “Two strikes” feature. If the gearmotor has a second HI AMP occurrence during the countdown period
(6 hours after a HI AMP time delay) a hard error will occur and the HI AMP and SERVICE LED’s will be
illuminated.
2. No current. To prevent the refrigeration system from running without gearmotor rotation the PC board will
indicate HIGH AMP and SERVICE if the drive relay is energized and there is no current draw.
HI PRESSURE: Should the refrigeration pressure rise above 425 psi, a hard error will occur. Even if pressure
fall-back below the reset point of 295 psi, the error will not clear and the machine will not restart.
LO WATER:
1. There is a sensor in the water reservoir that reaches down to the very bottom. The machine will not start if
water is not present at this sensor.
2. A hard error will occur should water not be present within 60 seconds of power up or if the sensors are
disconnected or damaged.
Relay output indication:
Each relay on the board has an indicator light associated with its output. For example, when the relay for the
water feed solenoid is energized, the adjacent indicator light glows green.
Comp/Sol output:
The output for the compressor is labeled COMP/SOL.
15
Page 16
Wiring diagram
20Watt
230Vac
20Watt
230Vac
FCV-1FCV-2
DRAIN
INPUT
WATER
S1
50/60Hz
#7
#8
5
4
#37
#38
L1
L2
208V/230Vac
L1
~12 Amp DRAW RUNNING
L2
2
O I
OFF/ON
1
240Vac / 20FLA
GND
J52
P52
CONTACTOR
#19
20FLA
240Vac
K11
POTENTIAL
RELAY
5
6
4
#43
SNUBBER
#18
1ÿ/230Vac
P1
COMP
R
C
#45
#44
12
#41
C2 START
#39
S
#46
#42
C1 RUN
#40
#47
M1
1/2hp Max
MOTOR
M2
BLU
.6 Amp Max
FAN
BRN
GRN
801 CHURCH LANE
EASTON, PA 18040, USA
FOR SERVICE CALL:
00135780R06
800-523-9361 OR 610-252-7301
ON THE WEB: www.follettice.com
HI
1
2
3
PRESS
OPEN @ 425 PSI
HIGH PRESSURE
CLOSE @ 295 PSI
OPENS @ EXCESS
J50
#1
CB1
#2
#3
GRN
BRN
BLU
P
2
PE
J31
J32
RESET
SWITCH
GRAY / GRAY PAIR
SIGNAL
RETURN
1
2
J3
J33
J34
POWER (G)
LOW BIN (G)
AUGER ON (G)
REFRIG ON (G)
TIME DELAY (Y)
CLEANING (Y)
PURGE (Y)
SERVICE (R)
HI AMPS (R)
HI PRESS (R)
LO PRESS (R)
DRAIN CLOG (R)
HI WATER (R)
LO WATER (R)
CPU (G)
#33
#32
#30
#31
TP7
TP8
#2
BLU
#38
#11
J13
J14
J15
J16
J17
IN
H2O
J18
H2O
DRN
J9
J8
J10
J12
J11
TP4
D10
D15
J7
L2
TP11
#37
J6
J5
J4
L1
#34
TP5
DRV
NOC
BRN
TP6
FAN
K3
AMP
SENSING
D6
D9
#12
TP3
J2
SOL
COMP
D5
CNO
K1
CONTROL PC BOARD
J21
J22J23
1
J51
3
8
LE
DRAIN
4
CLOG
BIN
7
LE
COM
2
FULL
1
1
1
JUMPER
J24
1
RED / GRAY PAIR
GRAY / GRAY PAIR
RETURN
INPUT 2
6
LE
HIGH
NORM
(CONTACT CLOSURE)
OR
4
LE
LOW
ALARM
COM
LOW
NORM
WATER LEVEL
3
LE
orizon 1400 Series Self-contained Icemaker
2
LE
BLU
-V
BLK
BRN
OUT (light on)
+V
(3 WIRE)
16
MOM
S3
CLEAN
MAINT
S2
PURGE
Page 17
Compressor data
Compressor current draw
Air-cooled
Ambient air temp. 60˚F/16˚C 70˚F/21˚C 80˚F/27˚C 90˚F/32˚C 100˚F/38˚C
8.01A 8.26A 8.77A 9.06A 9.36A
Water-cooled
Condenser water temp 50˚F/10˚C 60˚F/16˚C 70˚F/21˚C 80˚F/27˚C 90˚F/32˚C
9.09A 9.14A 9.06A 9.15A 9.39A
Locked rotor amps 96.8
Gearmotor data
Brother
Gearmotor current 2.8A (nominal)
Locked rotor amps 15 amps
Resistance of windings
208-230 vac gearmotor (Brother) 6.2Ω
Compressor start winding 3.5Ω
Compressor run winding 0.7Ω
Fan motor 38Ω
17
Page 18
Mechanical system
Evaporator disassembly
1. Press PURGE button to purge evaporator, and then
turn power OFF.
2. Unscrew and remove stream divider as shown.
3. Unplug and remove gearmotor as shown.
4. Remove all traces of petrol-gel from the auger shaft.
Fig. 13
Fig. 14
5. Unscrew and disconnect transport tube from
louvered docking assembly.
6. Unplug sensor at the electrical box.
7. Remove vent tube from shuttle housing as shown.
Fig. 15
18
Page 19
8. Loosen nut on V-band clamp and remove.
9. Remove V-band clamp from front of evaporator.
10. Remove main housing as shown.
11. Remove and discard mating ring and seal.
12. Carefully remove auger.
Fig. 16
Fig. 17
19
Page 20
Evaporator reassembly
1. Remove and inspect O ring seal. Discard if
damaged in any way.
2. Clean O ring groove. Lubricate O ring with
petrol-gel and reinstall.
3. Press new mating ring into main housing as shown.
4. Lube the shaft with liquid soap in the area shown
and slip on seal and spring.
Note: Do not touch the sealing surfaces. Use
cardboard disk to install.
Fig. 18
Fig. 19
Cardboard
disc
5. Reinstall main housing as shown.
Lube
with soap
Do not
touch
Fig. 20
20
Page 21
6. Orient auger shaft with keyway in the
upward position.
7. Force main housing into position against evaporator
and place 1/4" (7mm) diameter Phillips screwdriver
into hole in the auger shaft.
8. Replace V-band clamp as shown.
9. Replace nut on V-band clamp and tighten.
10. Remove screwdriver.
11. Reconnect transport tube to louvered
docking assembly.
12. Plug sensor in at the electrical box.
13. Reconnect vent tube to the shuttle housing
as shown.
Fig. 21
Note: Shuttle housing
removed for clarity
Fig. 22
14. Apply a coat of petrol-gel to the auger shaft.
15. Install gearmotor, making sure that insulation is
properly seated between gearmotor and main
housing as shown.
16. Firmly tighten four gearmotor bolts in place.
17. Insert a bolt into the auger shaft and finger tighten.
Fig. 23
Apply
petrol-gel
21
Page 22
18. Using a wrench, rotate the shaft clockwise to align
the keyways in the gear housing and the shaft so as
to accept the key.
19. Insert the key into the keyway.
20. Remove bolt and reinstall the washer and bolt.
Place retainer over bolt and secure with nut and
washer.
Fig. 24
Fig. 25
21. Lubricate body of stream divider with petrol-gel
and reinstall.
22. Plug gearmotor power cord into electrical box.
Note: The water control valve is factory set to maintain 238 ± 15 psi discharge pressure @ 70˚ F water.
Refrigeration system diagram
high side
refrigeration
line run
filter dryer
thermostatic
expansion
valve
high side
service port
low side
service port
condenser
low side
refrigeration
line run
compressor
High pressure vapor
High pressure liquid
Low pressure liquid
23
Low pressure vapor
Page 24
Refrigeration charge
All service on refrigeration systems must be performed in accordance with all federal, state and local laws. It is
the responsibility of the technician to ensure that these requirements are met. Recharging icemaker to other than
factory specifications will void the warranty.
R404A icemaker charge specifications
Model Charge Refrigerant type
HCC1400A (air-cooled) 34oz (652g) R404A
HCC1400W (water-cooled) 21oz (426g) R404A
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 all valves. 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.
Ambients Minimum Maximum
Air temperature1 50˚F/10˚C 100˚F/37.8˚C
Water temperature2 45˚F/7˚C 90˚F/32.2˚C
1
Ambient air temperature is measured at the air-cooled condenser coil inlet.
2
Ambient water temperature is measured in the icemaker water reservoir.
Ice capacity test
Icemaker production capacity can only be determined by weighing ice produced in a specific time period.
1. Replace all panels on icemaker.
2. Run icemaker for at least 15 minutes.
3. Weigh and record weight of container used to catch ice.
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 8oz = 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 Tables.
24
Page 25
“Bin full” detection system
The Follett Horizon icemaker incorporates a unique “bin full” detection system that consists of the shuttle and
actuator. The shuttle incorporates a flag and sensor. Referencing the figure below, the normal running position
of the flag is down, out of the sensor. When the bin fills to the top and ice can no longer move through the tube,
the machine will force the shuttle flag up into the sensor, shutting the machine off. The shuttle actuator, located
above the ice bin allows the ice to curl up within it when the bin is full. In this way, there are no loads generated
that would tend to lift off the lid of the bin.
Shuttle flag and sensor
Shuttle actuator
Running
Off
Running
Off
25
Page 26
Troubleshooting
Please see “Service” section for a description of each function.
Ice machine disposition Possible causes Corrective actions
Legend:
ONOFF
ON or OFFFLASHING
1. Ice machine is in running
condition but not making ice.
LOW BIN
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
2. The CPU is not flashing.
LOW BIN
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
3. Machine in TIME DELAY
without full bin.
LOW BIN
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
4. Ice machine is not making ice.
Locked in PURGE.
LOW BIN
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
1. Defective compressor.
2. Defective start relay.
3. Defective start capacitor.
4. Defective run capacitor.
5. Defective main contactor.
POWER
6. No output from PC board.
1. Processor has been damaged.
POWER
1. Ice jamming due to improperly
installed transport tube causing a
false shuttle.
2. Shuttle stuck in up position.
3. Damaged or improperly installed
thermostat (open).
POWER
4. Transport tube backed-out of
coupling.
1. A self-flush occurred but could
not drain evaporator due to a
failed drain solenoid valve.
2. A self-flush occurred but could
not drain evaporator due to water
reservoir or ice machine not
POWER
being level.
1. Replace compressor.
2. Replace start relay.
3. Replace start capacitor.
4. Replace run capacitor.
5. Replace main contactor.
6. Replace PC board.
1. Replace PC board.
1. Correct transport tube routing.
2. Repair or replace shuttle mechanism.
3. Replace or reposition thermostat.
4. Correct coupling installation.
1. Replace drain solenoid valve.
2. Level ice machine. Check water
reservoir to make sure it is not tilted
towards the compressor.
5. Ice machine is not making ice.
HI AMPS.
LOW BIN
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
6. Ice machine is not making ice.
HI PRESSURE.
LOW BIN
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
HI PRESS
DRAIN CLOG
HI WATER
CPU
LO WATER
1. Poor water quality causing ice to
jam auger.
2. Damaged shuttle mechanism or
thermostat (closed).
3. Kinked transport tube
(thermostat systems).
POWER
4. Intermittent drive output from
PC board. Evaporator will freeze
causing a hi amps error.