Page 1
FDE470 SERVICE MANUAL
FDE470
Purpose of this manual: To provide detailed
installation and operation instructions; to give
insights into how the machine works; to list
possible causes for problems; and to suggest
procedures for specific types of service.
The FDE470 is an ice maker and dispenser
combined into one cabinet. The refrigeration
system is air cooled, using R-134a as a refrigerant.
The control system uses electric eyes as a bin
control and a water level sensor as the water
safety control. As ice is made, it fills a plastic
storage bin. When ice is needed, a motor rotates a
stainless steel vane inside the storage bin and
sweeps the ice into the spout.
Table of Contents
Specifications: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
To The Installer: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
For The Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
For The Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Optional Kits: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Wall Mount Kit (KWB1): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Final Check List & Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
User Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Component Location & Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Refrigeration System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Water System Operation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Mechanical Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
Maintenance: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
Auger and Bearing Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
Inspection: Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22
Bearings, Water Seal and Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23
Bearing Replacement: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Gear Reducer Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Auger Drive Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
A Parts List and Wiring Diagram are located in the center of this manual, on yellow paper.
August 1994
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FDE470
Specifications:
The standard finish for this machine is painted
enamel. A stainless steel panel kit may be installed
at the field level to change the finish to stainless
steel. The kit number is: SPKFD470
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of UL, NSF and CSA.
Scotsman ice machines, like the FDE470, are
designed to be installed indoors, in a controlled
environment. The minimum and maximum
operating conditions are:
••Minimum Air Temperature: 50
••Maximum Air Temperature: 100
••Minimum Water Temperature: 40
••Maximum Water Temperature: 100
o
F.
o
F.
o
F.
o
F.
••60 Hz voltage may vary between 104 and 126
volts.
••Water Pressure may vary between 20 and 80
psi.
Operating the machine outside these conditions
constitutes misuse and voids the warranty.
Model Number Dimensions
W" x D" x H"
FDE740AE-1A 14 x
23
x
27
3
⁄
7
⁄
Basic
Electrical
115/60/1 12 lb. 470 lb./24Hr 14 oz. 14.6 20
Bin
Capacity
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of parts and/of other components not
specifically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.
Ice Making
Capacity
Refrigerant
Charge
(R134a)
4
8
Min.
Circuit
Ampacity
Max
Fuse Size
August 1994
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Page 3
To The Installer:
FDE470
A professional installation of any product is critical
to the long term satisfaction of the user. The
FDE470 is designed to be installed either on a
counter, or, using a wall hanging kit, hung from a
wall. Another option is a kit to increase the cabinet
height which will allow taller containers to be
placed under the spout. Determine the location
from the anticipated use and any options planned
for.
This machine is air cooled and blows air out the
lower left side of the cabinet. Do not install the
machine where the side to side air flow might be
blocked.
Cooling Air Flow
Water Quality:
The quality of the water supplied to the machine
will directly affect the purity of the ice and the
reliability of the machine. While the condition of the
water supplied to a building is normally out of the
control of the user, water can be treated at the
point of use.
There are two major types of water impurities:
suspended solids (those that are carried along
with the water and may be filtered out) and
dissolved solids (those that are part of the water
and have to be treated). A water filter is always a
good idea, but does require regular maintenance
to change the cartridge. In some water conditions,
water treatment may be required. Generally this
means a polyphosphate feeder of some kind.
Water softeners are not recommended for the
FDE470.
General Installation:
Place the machine in its final location. Remove the
top, right and left side panels:
1. Remove two screws at the back of the top panel.
Warm Air
Exhaust
The machine will require electrical power, water
and a drain. Follow all local codes. Rough in the
utilities before placing the machine into position
(see For The Electrician and For The Plumber).
2. Pull up on the back of the top panel and remove
it.
3. Remove screws from the sides (top and bottom)
of the side panels and from the splash panel.
4. Pull the side panels back and off the machine.
Plumbing connections may be made thru holes in
the back of the cabinet or thru the base.
••Route the sink drain to the back of the cabinet.
Route the bin drain to the back panel.
••Route the electrical power cord from the
junction box inside the cabinet. thru the back
panel .
••Route the inlet water line thru the back panel or
base to the flare fitting inside the cabinet.
Install the stainless steel panel kit (if used) now.
Install the back panel of the stainless steel panel
kit now (if used).
After all plumbing and internal wiring has been
done, replace the side and back panels.
Level the unit front to back and left to right.
The machine does not require sealing to the
counter due to the gasket on the base.
August 1994
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Page 4
FDE470
For The Electrician
Electrical connections:
Check the nameplate for voltage and current
requirements. An electrical cord is not supplied.
Connect the FDE470 to a separate electrical
circuit. Wiring to the machine must conform to all
codes. A licensed electrician may be required in
some situations.
Remove the back panel to make the electrical
connection. The electrical connection is made on
the terminal strip in the junction box inside the
machine. Replace the back panel when the
electrical connections are complete.
FOLLOW ALL APPLICABLE LOCAL,
STATE AND NATIONAL CODES
This Unit MUST BE GROUNDED
Electrical
Power
Remove Back Panel To
Expose Junction Box
August 1994
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For The Plumber
Drains:
The dispenser requires a gravity drain. The pitch
on the drain tubes must be at least 1/4 inch fall per
foot of horizontal run. On long horizontal runs, a
vent at the back of the cabinet will improve
draining, and is recommended.
There are two drains to connect: A sink drain, a
7
⁄
" plastic tube; and the bin drain, a
5
⁄
" plastic tube. Install rigid tubing between the
machine and the building drain. Route the
drains separately to the building drain.
Water supply:
Connect cold, potable water to the machine. A
hand valve near the location is recommended. A
water filter is also a good idea.
Follow all local codes.
Water Inlet Fitting
FDE470
8
8
FOLLOW ALL APPLICABLE LOCAL,
STATE AND NATIONAL CODES
(Inside Cabinet)
Water Supply
Strainer or
Filter
Bin and
Reservoir
Overflow Drains
Sink Drain
Building Drain
(Typical)
August 1994
Page 5
Page 6
nt s
FDE470
Optional Kits:
Sink Extension (KDE1 enamel or KDE1SS
stainless steel):
1. Remove the standard sink and splash panel
from the cabinet.
2. Remove the glass filler lever and holder.
3. Remove drain tube from standard sink.
4. Install drain tube onto replacement sink.
5. Remove rubber gasket from the base of the
dispenser.
6. Mount the dispenser on the base. The flange of
the dispenser base fits in slots provided in the
base extension. Secure the base extension to the
sink with the 3 screws on the front side panel.
7. Mount the sink in place and secure with two
machine screws.
8. Install splash plate to cabinet with four machine
screws. The splash plate fits over the sink.
9. Install the glass filler lever and holder to the
splash panel.
10. Install grill.
Base Extension
Ki t Compone
Kit Splash
Panel
Grill
Sink
August 1994
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Page 7
Wall Mount Kit (KWB1):
Wall
Brackets
Top Case
Bracket
FDE470
Contents:
1. Top Case Hanger Bracket: Attaches to the frame
of the dispenser.
2. Top Wall Bracket: Mounts to the wall and
engages the top case hanger bracket to support
the dispenser.
3. Bottom Wall Bracket: Mounts to the wall and
spaces the base of the dispenser away from the
wall.
4. Bottom Fittings Cover: Fastened to the bottom
Top Wall Bracket:
1. Hold the bracket on the wall where it will be
mounted.
2. Mark on the wall the positions of the holes in the
bracket.
3. If needed, drill pilot holes for the fasteners.
4. Secure the bracket to the wall with fasteners of
sufficient strength to hold up the FDE470.
Bottom Wall Bracket:
1. Lift up and hang the dispenser from the top wall
bracket.
2. Position the bottom wall bracket so that the
molding on the dispenser base bottoms in the
channel of the wall bracket.
3. Secure the bracket to the wall.
Bottom Fitting Cover:
1. Connect electrical power, water inlet, bin drain
and sink drain of the dispenser thru the bottom of
the case.
Top Panel
wall bracket to hide the utility connections.
Installation: Check building wall for the strength
required to support a machine of the FDE470’s
weight and size. Note that if at least 6" of space is
not left above the machine, cleaning and most
service of the machine will require removal of the
machine from the wall mounts. All utilities are to be
routed thru the base. The back panel is not used
when the machine is hung from the wall.
Top Case Hanger Bracket
1. Remove top panel.
2. Remove back cover and save the 4 screws for
mounting the bracket.
3. Drill out the holes (as marked in the illustration)
in the back of the frame with a 3/16" drill bit.
4. Place top hanger bracket on the inside of the
frame and fasten to the frame with the four screws
removed in step 2.
Enlarge Holes
Bottom
Cover
Secure With
Screws
2. Secure bottom fitting cover to the bottom wall
bracket with the four sheet metal screws provided
in this kit.
August 1994
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FDE470
Final Check List & Initial Start Up
1. Is the machine located indoors where the
temperature limitations are not exceeded?
2. Is there at least 6" clearance on both sides of
the cabinet for adequate air flow?
3. Is the water supply adequate, and has a shut off
valve been installed?
4. Is the cabinet level?
5. Have all of the electrical and drain connections
been made?
Initial Start Up
1. Remove 2 screws at the back of the top panel
and remove the top panel.
2. Remove screws and the side panels.
3. Open the water supply shut off valve.
4. Watch the water fill the reservoir. Check that it
flows in and fills the reservoir near to the mark
molded into the side of the reservoir. Check that
the float shuts off the water flow when the tank is
full. Check for leaks. Tighten hose clamps as
needed.
5. Plug the unit in or switch on the electrical power.
After about 15 seconds the machine should start.
6. Let the machine operate, listen for any unusual
noises. If needed, reposition tubing & panels to
eliminate vibration.
After the unit has been operating for about 10
minutes, there should be enough ice in the bin to
test the dispense system.
7. Using a container, push the glass filler lever in
and see that ice is dispensed (the bin drive motor
continues to run as long as the glass filler lever is
pushed in).
8. Move the water switch (rocker switch on the
front panel) to ON. Then use a container to push in
the glass filler lever. Both water and ice should be
dispensed.
9. Pour water into the sink and check that the drain
does not leak but drains the water rapidly.
10. Explain to the user the maintenance
requirements and operation of the machine.
11. Fill out the Warranty Registration and
Customer Evaluation form. Mail it to Scotsman.
12. Leave the service manual with the owner/user
and explain who should be called if service is
needed.
August 1994
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Page 9
User Operation
The FDE470 is an automatic ice vending machine.
All it requires is cool air, clean water and an
adequate supply of electrical power.
To Vend Ice:
Push the glass filler lever in and hold it in until the
container is full of ice. Do NOT overfill the
container or a build up of ice in the sink or a back
up of ice in the spout will occur.
To Vend Ice and Water.
Switch the Water Switch to ON. Push in the glass
filler lever; water and ice will be dispensed into the
container below the spout. Note: The water is NOT
cooled, it is the same temperature as the building
supply water.
Daily Maintenance: Pour hot water into the sink to
flush out any debris or build up. Wipe the cabinet
off, wash the sink and grill to keep minerals from
accumulating.
FDE470
Water
Switch
Glass
Filler
Lever
August 1994
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Page 10
FDE470
Component Location & Function
Evaporator. This is a vertical cylinder full of water
and refrigerated. Also in the cylinder is a slowly
rotating auger. The auger forces the ice up the
evaporator walls and compresses it at the top. The
resulting flaked ice then falls by gravity into the ice
storage bin.
Water Reservoir. The water reservoir contains the
inlet float valve and the water level sensor. The
float valve controls the flow of water into the
reservoir, and the water level sensor will stop the
ice maker if the water supply fails.
Ice Storage Bin. The ice storage bin is an
insulated plastic container that is open at the top
and has a spout at the bottom. There is a rotating
ice vane inside the bin that causes the ice to be
swept over the spout and dispensed. The vane is
rotated by a gear motor at the top of the bin.
Bin Cover. The bin cover not only keeps dirt from
the ice storage bin, it also is the support for the
dispense gear reducer and the location of the
electric eye bin controls.
Condenser. The FDE470 uses
an air cooled condenser. It blows
air out, away from the fan motor.
The heat removed from the water
is exhausted from the condenser.
Compressor. The refrigeration
system compressor provides the
force to move the refrigerant
around the system.
Auger Drive. The auger drive is
a direct drive gear reducer.
Glass Filler Lever. When
pushed in, it moves a
microswitch an causes the
dispense gear reducer to rotate
the vane and dispense the ice.
Compressor
Auger Drive
Water Reservoir
Evaporator
Bin Cover
Condenser
Ice Storage
Bin
Glass Filler Lever
August 1994
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Page 11
Refrigeration System Operation
Schema t i c
The FDE470 uses a forced draft condenser,
capillary tube and hermetic compressor. The
system uses R-134a as a refrigerant. High
pressure, high temperature refrigerant is forced
thru the condenser where it looses enough heat to
condense. The high pressure liquid refrigerant
then passes thru the capillary tube which causes a
pressure drop in the evaporator. As the high
pressure liquid refrigerant moves into the
evaporator’s area of low pressure, the warm water
and low pressure cause the refrigerant to
evaporate and absorb heat from the metal walls of
the evaporator. After the refrigerant has flowed thru
the evaporator it goes back to the compressor thru
the suction line as a low pressure vapor. At the
compressor the cycle is repeated.
The FDE470 uses a low side pressure control as a
safety, it will shut the system down if the suction
pressure is too low for reliable operation.
FDE470
System Characteristics:
••Typical Low Side Pressure:
13 - 14 PSIG
••Typical Discharge Side Pressure:
135 - 175 PSIG
••System Refrigerant Charge:
14 ounces of R-134a
Evaporator
Compressor
Capillary Tube
Dryer
Ref r i ge r at i on Sy st em
August 1994
Air Cooled
Condenser
Page 11
Page 12
Water Level
Sensor
FDE470
Water System Operation:
The water system consists of a float valve,
reservoir and water dispense solenoid valve. The
water level in the reservoir tank is the same level
as that inside the evaporator. Building water supply
flows to both the float valve and the solenoid. The
float valve will open to add water to the reservoir
as water flows out to the evaporator. The solenoid
will only open if the water switch is closed and the
dispense lever is pushed.
Evaporator
Electric Eyes
Ice
Dispensing
Vane
Inside the evaporator there is a water seal. This
seal is the type that has a rotating half and a
stationary half. The area where the two seals
touch are smooth flat surfaces. When the auger is
installed in the evaporator, it forces the rotating
half of the seal against the stationary half. The
stationary half is spring-loaded and provides a firm
pressure against the auger portion of the seal.
Float Valve
Water Seal
Inner Bin
Bottom
Water and Ice
Dispensing Spout
Water Dispensing
Solenoid Valve
Sink
Bin and
Reservoir
Overflow
Drain
Water Inlet
Connection
Wat er Sys t e m Schemat i c
August 1994
Page 12
Sink Drain
Page 13
Mechanical Operation
FDE470
General:
The FDE470 makes, stores and dispenses ice. It
also dispenses water. The ice making portion of
the machine produces flaked ice at about 32
The ice falls thru a chute into the dispensing bin.
Above the cylindrical bin is a dispense drive motor
and electric eyes. The drive motor is connected to
an ice vane in the bin. When the user pushes in
the glass filler lever, the dispense drive motor
rotates the vane and the ice. There is a slot in the
base of the bin, located just above the vend spout
and glass filler lever. When the ice moves over that
slot, some of the ice on the bottom of the bin falls
thru the slot, into the chute and fills the container.
ON/OFF Control:
Flaked ice is produced by the ice maker until ice
builds up between the electric eyes. When the
electric eyes can no longer "see" each other, they
send a signal to the control board to shut the
machine off. The refrigeration compressor stops
but the auger drive motor will continue to operate
for about 2 minutes to clear the evaporator of ice.
Water Control:
o
F.
Water System
Water flows from the building supply to the
reservoir and to the electric solenoid valve. Water
from the reservoir is used to make ice. Water the
flows thru the solenoid is dispensed.
The bin, sink and reservoir overflow all have
drains.
Because water is such an important requirement
for making ice, a water level sensor has been
placed in the reservoir. If the water supply to the
machine should fail, the water level sensor will
send a signal to the control board to shut down the
machine.
Refrigeration:
The refrigeration system uses a hermetic
compressor (specifically designed for R-134a),
forced draft air cooled condenser, capillary tube
and vertical flaked ice evaporator. Inside the
evaporator is a slowly rotating auger. The auger is
supported by bearings at each end, and there is a
face-type water seal above the bottom bearing.
The auger is driven by a 1/10 HP direct drive gear
reducer. The auger drive motor has a speed
operated switch on it that will keep the compressor
from operating if the auger motor is not turning at
full speed.
August 1994
Page 13
Page 14
FDE470
Maintenance:
Although the ice in this dispenser is completely
untouched, the water and ice vending systems will
need to be periodically sanitized and
de-mineralized. The air cooled condenser will also
need to be kept clean.
Schedule the sanitation, cleaning and
de-mineralization on a regular basis to keep the
ice clean and the machine operating efficiently.
Sanitation and Cleaning
Water System:
This ice machine requires periodic sanitation and
de-mineralization.
1. Vend all ice from the machine.
12. Repeat steps 3-11, except substitute a locally
approved sanitizing solution for the cleaner. A
possible sanitizing solution may be obtained by
mixing 1 ounce of household bleach with 2 gallons
of clean, warm (95
o
F.-115oF.) water.
2. Remove top and right side panels.
3. Unplug or disconnect electrical power.
4. Shut off water supply.
5. Drain reservoir.
6. Mix 8 ounces of Scotsman Ice Machine Cleaner
and 3 quarts of hot (95
Scotsman Ice Machine
Cleaner contains acids.
These compounds may
cause burns.
If swallowed, DO NOT
induce vomiting. Give
large amounts of water or
milk. Call Physician
immediately. In case of
external contact, flush
with water.
KEEP OUT OF THE
REACH OF CHILDREN.
7. Pour the water into the reservoir.
8. Wait 15 minutes for the cleaner to dissolve the
minerals inside the evaporator.
9. Plug in the machine or reconnect electrical
power.
10. As the machine operates, pour in the balance
of the cleaning solution.
11. Reconnect water supply, operate the machine
for 15 more minutes, then switch it off.
o
F. -115oF.) potable water.
13. Unplug or disconnect electrical power.
14. Remove bin top, pour in warm potable water to
melt out any ice.
15. Pull out the vane and bin bottom from the bin.
16. Thoroughly wash the bin’s interior, bin top
interior, spout, ice vane and bin bottom with the
sanitizing solution. Pour some down the bin drain.
17. Reassemble the bin bottom, vane and bin
cover.
18. Wash the sink area with the sanitizing solution
and pour sanitizing solution down the sink drain.
19. Replace all panels and reconnect water and
electrical power.
Air Cooled Condenser:
1. Disconnect electrical power.
2. Remove top panel
3. Remove right and left side panels.
4. Use pressurized air to blow the lint from the
outside of the condenser in towards the fan motor.
A vacuum cleaner hose placed on near the fan
motor should pick up most of the dust. Check for
interior dirt. If needed, use coil cleaner to
de-grease the condenser.
5. Replace all panels and reconnect electrical
power.
August 1994
Page 14
Page 15
Auger and Bearing Inspection
Snap Ring
Breaker
ngs
While in most areas regular in-place cleaning with
Scotsman Ice Machine Cleaner will be adequate to
keep the interior of the evaporator free of
excessive mineral build up, some water conditions
may require more intense methods. In addition,
the auger bearings require physical inspection to
determine that they are not wearing. This physical
inspection is recommended twice per year for the
top bearing and once per year for the auger and
both bearings.
FDE470
Auger & Bear i
Cap
Cap Screw
Whenever the auger is removed, replacement of
the water seal is recommended.
If a bearing requires replacement, the other
bearing must also be replaced.
1. Unplug or disconnect electrical power.
Rotating parts hazard.
Disconnect Electrical
Power Before Beginning.
2. Shut off the water supply.
3. Remove top panel.
4. Remove right side panel.
5. Drain the evaporator and reservoir.
6. Remove foam cap on top of evaporator.
7. Remove 2 permagum plugs from the side of the
evaporator.
8. Remove 2 screws (screwheads were covered
by the permagum).
9. Pull up on the pull ring to remove the auger. If it
is difficult to pull:
Breaker
Screws
Bottom
Bearing
Washer
Top Bearing
Set
Auger
A. Remove the breaker cover by taking the snap
ring out.
B. Unscrew the auger bolt.
C. Use threaded rod or a slide hammer puller and
screw into the auger, slide the weight quickly up
against the stop to remove the auger.
If the auger still will not move, bearing replacement
is mandatory. See Bearing Removal and
Replacement.
Water
Seal
Coupling
Adapter Stand
August 1994
Page 15
Page 16
FDE470
Inspection: Auger
The auger is made of stainless steel. It has a
polished surface that may be either shinny or dull,
but must be smooth. After removal, allow the auger
to dry to inspect for scale. If mineral scale is found
on the auger’s surface, clean off the auger with ice
machine cleaner and a scrubbing pad.
Remove the water seal and clean off the shoulder
of the auger.
Bearings: The top bearing should spin freely with
no rough spots. If it feels rough when spun by
hand, replace it. There should be minimal rust or
dirt. If in doubt, replace the bearing.
Note: The top bearing used in the FDE470 is a
"directional" bearing. Note which way the inner
race is configured and install into the breaker. The
breaker is also available as a replacement part
with the top bearing already installed.
The bottom bearing must be removed from the
evaporator when replacing the water seal.
Remove bin cover.
Remove the three bolts holding the
evaporator to the gear motor adapter and lift
the evaporator up
slightly. Tap the water
seal and bottom
bearing out from the
top down. Check the
bottom bearing the
same way as the top.
Replace the water
seal and install a
new bearing set if
needed.
Outer
Race
To replace the water seal:
1. Remove old rotating half from the auger. Clean
the mounting area.
2. Place a bead of food grade sealant (such as
Scotsman part number 19-0529-01) onto the
shoulder of the auger where the rotating half of the
water seal will be installed.
3. Wash the new seal in water. While wet, slip it
onto the bottom of the auger, rubber side toward
the auger. Push up until seated against the
sealant. Do not allow any sealant to come into
contact with the face of the seal.
4. Wash the stationary half the water seal with
water. Slip it up into the bottom of the evaporator
until the bottom of the seal is inside the evaporator
about 1/4".
5. Push the bottom bearing against the water seal
until the bottom bearing is inside the evaporator
about 1/16".
6. Replace the evaporator on the adapter, and
re-attach the stand using the original bolts.
7. Attach the auger to the top bearing
and breaker.
8. Return the auger to the evaporator
and slide it down until the splines touch
Inner Race
Wider on Top
Side
Open
Sides
the coupling.
9. Rotate the auger until the coupling
splines align with the auger.
10. Push the auger down, and rotate
the breaker until the screw holes line
up with the pilot holes in the evaporator.
11. When the auger is completely
seated, reinstall the breaker screws.
12. Replace permagum and foam top.
Sealant
Here
Rubber
Smooth
Side
13. Switch on the water supply.
14. Check bin cover for electrical
grounds and switch on the electrical
power.
15. Observe operation. The unit should
make minimal noise while producing
ice. Catch first 2 minutes of ice and
discard it.
16. Replace the bin cover and all
panels.
Water Seal
August 1994
Page 16
Page 17
Inspection:
Photo-Electric Eyes
The photo electric eyes used to "see" the ice build
up in the top of the bin cover must be clean to get
a good "look" at the ice. If clouded by mineral
scale, the eyes will cause the ice machine to shut
off and stay off.
To clean the photo-electric eyes.
1. Remove the top panel.
2. Pull both of the photo-electric eyes out of their
rubber grommets.
3. Wash both eyes with a clean cloth dipped in
Scotsman Ice Machine Cleaner.
4. Wash the eyes off with clean water.
5. Replace the eyes in the grommets
6. Replace the top panel
FDE470
Clean Photo-Electric
Eyes
Water Level Sensor
The water level sensor may not shut the ice
machine off when the reservoir goes dry if there is
a film of mineral scale on the probe tip.
1. Remove the top panel.
2. Remove the reservoir cover.
3. Pull the water level probe up and out of the
reservoir.
4. Carefully wipe the tip of the probe with a clean
cloth. Ice machine cleaner may be needed.
Note: The tip is made of glass.
5. Reinsert the water level sensor in the reservoir.
6. Replace the reservoir cover and the top panel.
Coupling
Use the grease zerk on the side of the coupling to
add grease once per year.
That concludes normal maintenance. If the fan
motor has an oil plug, it may be oiled after 10
years of operation.
Clean Water Level
Sensor
Water
Reservoir
August 1994
Page 17
Page 18
FDE470
Service Diagnosis
PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION
No ice is dispensed. No ice in bin due to:
••No electrical power
••Overuse
••Water supply turned off
••Bin controls dirty
••Water sensor dirty
••Control system malfunction
••Auger drive motor open
••Centrifugal switch open
••Auger does not turn
••No refrigeration
Ice in bin, but will not dispense:
Drive motor does not turn
••Vend switch does not close
••Dispense motor open
••Dispense output shaft broken
Ice in bin, motor turns vane.
Ice jammed up
••Users held cup against
dispense spout and jammed
unit.
••Bin bottom slot not over spout
••Ice will not slide down bin wall,
bin out of round.
••Sink height too small for
container used
••Wet ice in the bin from high
water level or high suction
pressure
Check/restore power
Recheck ice needs vs. machine
capacity.
Check water filter/hand valve/float
valve
Check & clean bin control (electric
eyes)
Check & clean water sensor
Check control system
Check auger drive motor
Check centrifugal switch
Check coupling & gear reducer
Check refrigeration system
Check/replace vend switch
Check/replace dispense motor
Check/replace output shaft
Advise owner/manager to instruct
users.
Check bin bottom position
Check bin interior wall for rough
texture or out of round.
Install sink extension kit
Check water level, check suction
and discharge pressures
August 1994
Page 18
Page 19
FDE470
Service Diagnosis
PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION
Unusual noise Mineral scale in evaporator Clean water system with ice
machine cleaner.
Auger coupling dry Grease coupling
Auger coupling worn Replace coupling and adapter
stand.
Bearings worn Replace bearings and water seal.
Gear motor loose on frame Tighten bolts, check grommets
Low water level Check water level in reservoir
Tubing vibrating Check tubing for contact
Tooth on a gear missing Check gears in auger drive
Compressor too loud Replace compressor
Gear noise Check gear motor for oil leak
No water is dispensed Water Switch in Off position Switch to ON
Water switch open Replace switch
Water solenoid plugged up Clean inlet screen of solenoid
Water solenoid coil open Replace solenoid
Vend switch open Replace switch
Water turned off Restore water supply
Water drips from spout Melting ice in chute Some water dripping is normal
Water solenoid leaks thru Replace solenoid
Ice jammed in spout Clear ice jam, check for cause
Ice will not stop dispensing Vend switch stuck closed Replace switch
Water leaks from cabinet Evaporator water seal worn or
cracked
Tubing to evaporator leaks Replace tubing/fittings
Drain leaks Check drain tubes and fittings
External drain restricted Clean out drain
No refrigeration Gear motor does not turn Check motor
Centrifugal switch does not close Check switch
Fan motor does not turn Check fan motor
Lack of refrigerant Add refrigerant, if problem is
Compressor does not pump Check/replace start capacitor
Replace seal and bearings
reduced, locate leak and repair it.
Check/replace start relay
Check/replace compressor
August 1994
Page 19
Page 20
FDE470
Electrical System
Bin and Water Level Sensors
There are two indicator lights on the control board.
The Bin Empty light glows when there is no ice
between the electric eyes.
The Water Level light only glows when there is a
lack of water in the reservoir.
If no lights, check for power to the machine and
voltage from the transformer. Also check for
mis-alignment of the electric eyes or dirty eyes.
Clean and or adjust as needed.
To check the electrical system, first check the lights
on the circuit board.
1. Remove the top panel.
2. Remove the right side panel.
3. Remove the control box cover.
If the problem is that the machine will not start, and
the bin empty light is glowing and the water level
light is not, the gearmotor relay should be
checked. The auger motor must start, and the
switch on top the motor close, or the compressor
will not receive any electrical power.
To use the Scotsman Circuit Tester:
1. Disconnect the electrical power.
2. Unplug the electric eyes (marked "photo trans"
and "LED") and water level sensor (marked "water
sen") from the control board.
3. Plug the connecting wires from the tester into
the circuit board.
4. Reconnect power.
5. Move the Bin Full switch on the tester to FULL.
The light on the tester should be ON.
If the gear motor relay is not closed (Com to NO),
there is a potential problem with the control circuit.
Scotsman has a circuit tester that can be plugged
in to replace the water level sensor and the electric
eyes. Use it or use replacement sensors to
determine if the fault is at the water level sensor,
the electric eyes or in the circuit board. The
sensors cannot be "ohmed" or jumped out.
If the light on the tester is not on, the circuit board
should be replaced.
6. If the light on the tester is ON, move the bin full
switch to Bin Empty. The light on the tester should
go OFF, and the Bin Empty light on the circuit
board should go ON.
If the bin empty light is on, wait 10-20 seconds for
the machine to start. If the machine starts, replace
the electric eyes.
If the bin empty light does not go on, replace the
circuit board.
7. Move the "Water" switch on the tester to the No
Water position. The No Water light on the circuit
board should go on. If not, replace the circuit board.
8. Move the "water" switch on the tester to the
"Water" position. The No Water light on the circuit
board should go OFF. If not, replace the circuit
board. If the light goes go off, replace the ice level
sensors.
August 1994
Page 20
Page 21
Removal and Replacement
FDE470
Panels:
1. Remove two screws at the back of the top panel.
2. Lift up at the back and push the top panel
forward to release it.
3. Remove 3 screws at the top, 3 screws at the
bottom and 1 screw at the front edge of each side
panel.
4. Push each side panel to the rear to release the
panel from the cabinet frame.
Dispensing System
The dispensing system consists of the vend
switch, dispense motor, dispense vane, bin bottom
and bin.
Electrical Shock Hazard
Disconnect electrical
power before beginning.
7. Unscrew the output shaft extension from the
gear motor.
8. Remove screws holding the mounting bracket to
Dispense Drive
Motor
Bin Top
Vend Switch
1. Disconnect electrical power
2. Remove top panel
3. Remove right side panel.
4. Mark position of switch retaining screws in the
slots of the switch bracket.
5. Remove two screws holding vend switch to
mounting bracket.
6. Disconnect wires from vend switch
7. Remove switch from the machine.
8. Reverse to reassemble and install in the same
position as the original.
Dispense Gear Motor
1. Disconnect electrical power.
2. Remove top panel.
3. Remove one screw holding ground strap to
cabinet frame.
4. Cut off two dispense motor wire nuts.
5. Remove screws holding dispense drive gear
motor to the bin top.
the gear motor.
9. Reverse to reassemble, be certain that the new
wire nuts are secure and that the ground strap is
reattached.
Dispense Vane
1. Disconnect electrical power.
2. Remove top panel.
3. Remove four thumb screws holding bin cover to
bin.
4. Lift bin cover off bin. Set aside.
5. Grasp the ice vane and pull it straight up.
6. Reverse to reassemble.
Bin Bottom.
Perform steps 1-5 above (to remove the dispense
vane).
1. Lift bin bottom out of the dispense bin.
2. When replacing, be sure that the slot on the bin
bottom is over the dispense chute (at the front).
6. Pull gear motor off the bin top.
August 1994
Page 21
Page 22
FDE470
Water System
The water system consists of the reservoir and
inlet water valve.
Reservoir.
1. Shut off the water supply.
2. Remove the top panel.
3. Remove the right side panel.
4. Drain the water reservoir and evaporator.
5. Disconnect inlet and outlet tubes from the
reservoir.
6. Remove screws holding reservoir to its
mounting bracket.
7. Remove reservoir from the machine.
8. Reverse to reassemble.
Float Valve
1. Shut off the water supply.
2. Remove the top panel.
3. Remove the reservoir cover.
4. Remove the water inlet tube.
Valve Plunger
1. After the valve has been removed from the
reservoir, remove the nut holding the valve to its
mounting bracket.
2. Pull out the cotter pin to release the internal
valve plunger.
Note: Do not replace the plunger if the valve’s seat
is damaged. Replace the valve.
Inlet Water Valve.
1. Disconnect electrical power.
2. Shut off the water supply.
3. Remove the top panel.
4. Remove the right side panel.
5. Remove wire harness from inlet water valve.
6. Remove tube connecting outlet of the valve to
the dispense tube.
7. Rotate the valve to unscrew it from its inlet fitting.
8. Reverse to reassemble.
5. Push in the mounting tabs at the back of the
reservoir and lift the valve out of the reservoir tank.
6. Replace with a new valve or replace the valve
plunger.
Plunger
Valve
Water Level
Sensor Slot
August 1994
Page 22
Page 23
Bearings, Water Seal and Auger
Bolt
Breaker
Auger
Water Seal
FDE470
1. Disconnect electrical power.
Rotating parts hazard.
Disconnect Electrical
Power Before Beginning.
2. Shut off the water supply.
3. Remove the top panel.
4. Remove the side panels.
5. Drain the reservoir and evaporator.
6. Remove foam cap from the top of the
evaporator.
7. Remove the two permagum plugs from the side
of the evaporator.
8. Pull up on the ring to lift the auger out of the
evaporator.
If the auger will not lift out:
1. Remove snap ring holding bearing cover to
breaker.
2. Remove bearing cover.
3. Unscrew bolt holding bearing to auger.
1. Remove three cap screws holding evaporator to
the adapter stand.
2. Lift evaporator up slightly and tip the bottom out
to expose the splined end of the auger.
3. Remove snap ring holding bearing cover to
breaker.
4. Remove bearing cover.
5. Unscrew bolt holding bearing to auger.
6. Screw a length of threaded rod or a shoulder
screw into the auger.
7. Tap on the end of the threaded rod to push the
auger out of the bottom of the evaporator.
8. Replace the bearings and water seal. Replace
the auger if the splines are damaged. Replace the
evaporator if more than 1/3 of the vertical rifle
grooves are gone. Sand or hone and sand the
inside of the evaporator if mineral build up is heavy.
Snap Ring
Cap
4. Thread in a threaded rod and weight or
slide-hammer puller into the auger.
5. Use the threaded rod & weight or slide hammer
puller to remove the auger.
Or
1. Remove three cap screws holding evaporator to
the adapter stand.
2. Lift evaporator up slightly and tip the bottom out
to expose the splined end of the auger.
3. Use a plastic mallet or dead-blow hammer to tap
the bottom of the auger and force the auger up. Do
NOT damage the splines of the auger or the auger
will have to be replaced.
If the auger is "frozen" to the bottom bearing, do
not force the bottom bearing thru the evaporator.
Washer
Top Bearing
Coupling
August 1994
Page 23
Page 24
FDE470
Bearing Replacement:
Top Bearing Replacement
If the inner race is secure, use an arbor press to
push the top bearing out of the breaker. If the inner
race has separated from the bearing, replace the
breaker.
Insert a new bearing in the breaker, check for
orientation:
The top of the bearing has a wider inner race and
a narrower outer race than the bottom.
Replace the "O" ring in the breaker.
Push the bearing in, push only on the outer race.
Water Seal & Bottom Bearing Replacement:
1. Remove old rotating half from the auger. Clean
the mounting area.
2. Place a bead of food grade sealant (such as
Scotsman part number 19-0529-01) onto the
shoulder of the auger where the rotating half of the
water seal will be installed.
3. Wash the new seal in water. While wet, slip it
onto the bottom of the auger, rubber side toward
the auger. Push up until seated against the
sealant. Do not allow any sealant to come into
contact with the face of the seal.
4. Wash the stationary half the water seal with
water. Slip it up into the bottom of the evaporator
until the bottom of the seal is inside the evaporator
about 1/4".
5. Push the bottom bearing against the
water seal until the bottom bearing is
inside the evaporator about 1/16".
6. Replace the evaporator on the adapter,
and re-attach the stand using the original
bolts.
Inner Race
Wider on Top
Side
7. Attach the auger to the top bearing and
breaker.
8. Return the auger to the evaporator and
slide it down until the splines touch the
coupling.
Sealant
Here
Rubber
Smooth
Side
Outer
Race
Water Seal
Open
Sides
9. Rotate the auger until the coupling
splines align with the auger.
10. Push the auger down, and rotate the
breaker until the screw holes line up with
the pilot holes in the evaporator.
11. When the auger is completely seated,
reinstall the breaker screws.
12. Replace permagum and foam top.
13. Switch on the water supply.
14. Check bin cover for electrical grounds
and switch on the electrical power.
15. Observe operation. The unit should
make minimal noise while producing ice.
Catch first 2 minutes of ice and discard it.
16. Replace the bin cover and all panels.
August 1994
Page 24
Page 25
Refrigeration System
This ice machine uses R-134a as the refrigerant.
This refrigerant has no chlorine, and therefore
requires polyolester type refrigerant oil. This oil
requires specific service procedures.
General Service
A HFC type liquid line drier is required. "Standard"
driers may not take out enough moisture and may
affect the oil additives.
The time that the refrigeration system is open to
the air must not exceed 15 minutes. The oil will
rapidly absorb moisture from the air, and the
contact time must be kept to a minimum.
A special or very sensitive electronic leak detector
will be needed to locate refrigerant leaks. Many
are on the market that will sense R-134a.
The access valves must be in the closed position
before the hose caps are removed. Do not remove
the hose caps before checking the position of the
valve. Use a 3/16" allen wrench to open and close
the valve.
Stem Cap
Torque Stem
to 6-8 ft. lb.
Acces s Val v e
As with any other refrigerant, do not place
pressurized air or oxygen into the refrigeration
system.
Note: The refrigeration system uses an HFC
type refrigerant and MUST use an HFC type
drier.
Torque to 8-12 ft. lb.
Fitting Cap
Torque to 7-12 ft. lb.
FDE470
Temperature Pressure Chart, Selected Points
Temperature in
0
F. PSIG of R-134a
-10 2.0
-6 3.7
-4 4.6
-2 5.5
0 6.5
1 7.0
2 7.5
3 8.0
4 8.6
5 9.1
10 12.0
12 13.2
14 14.4
16 15.7
18 17.1
20 18.4
25 22.1
30 26.1
31 26.9
32 27.8
33 28.6
34 29.5
35 30.4
40 35.0
45 40.0
50 45.4
75 78.7
90 104.3
110 146.4
120 171.1
130 198.7
150 262.8
Evacuation to 200 microns is recommended.
August 1994
Page 25
Page 26
nent s
FDE470
Gear Reducer Removal
1. Disconnect electrical power.
Electrical Shock Hazard
Disconnect electrical
power before beginning.
2. Shut off the water supply.
3. Remove the top and side panels.
4. Remove the control box cover.
5. Remove the centrifugal switch cover on the top
of the auger drive motor.
6. Disconnect the electrical wires from the
centrifugal switch.
7. Drain the evaporator and reservoir.
8. Disconnect the water inlet tube from the
evaporator.
9. Remove the three screws holding the
evaporator to the adapter stand.
10. Lift the evaporator up high enough for the
auger to clear the adapter stand.
11. Remove the mounting bolts holding the gear
reducer to the cabinet frame.
12. Trace auger drive motor wires back to the
control box.
13. Disconnect the drive motor wires from the relay
on the circuit board.
14. Pull the wires back to the auger drive motor.
15. Pull the gear reducer out the side of the
cabinet to remove it from the machine.
Note: If there is evidence of water near the output
shaft of the gear reducer, it would be a wise
precaution to pull the auger from the evaporator
and check the bearings.
16. Rebuild or replace the gear reducer.
Motor Cover &
Bearing
Fan
Stator
Rotor
Rotor
Bearing
Shaft Seals- 2,
back to back
E-Clip
Woodruff Key
Output Gear
Gear Reducer Compo
Gear Case
August 1994
Page 26
Page 27
Auger Drive Motor
FDE470
The windings or top bearing & cover may be
replaced without removing the evaporator or gear
reducer from the machine.
1. Disconnect electrical power.
Electrical Shock Hazard
Disconnect electrical
power before beginning.
2. Shut off water supply.
3. Remove top panel.
4. Remove right side panel.
5. Drain the reservoir and evaporator.
6. Disconnect the reservoir outlet tube from the
bottom of the reservoir.
7. Remove screws holding reservoir mounting
bracket to the cabinet.
8. Lift the reservoir up & away from the top of the
auger drive motor.
9. Remove the 4 bolts holding the auger motor
cover to the gear reducer case.
10. Lift the plastic switch housing off the auger
drive motor.
If the rotor needs to be removed:
1. Run a screw into the top of the rotor.
2. Grasp the screw with a grip pliers.
3. Pull and/or tap on the pliers to pull the rotor &
bearing out of the gear reducer.
4. Inspect the bearing and input seal. Replace
them if worn.
Note: When the rotor is re-installed, be certain that
the bearing is fully seated in the gear case.
Gear Reducer Rebuild
1. After the gear reducer has been removed, the
internal components may be inspected and/or
replaced. Remove all bolts holding the two case
halves together.
2. Tap against the roll pins at each end of the gear
cases to split them.
3. Pry the case halves apart.
4. Check the internal condition of the gear reducer.
If rusty or water is present, replace the complete
assembly. The oil should be black and the proper
oil level is 1/8" from the top of the biggest gear
(with all gears installed). Check the input seal.
The gears may be replaced individually.
11. Hold the centrifugal switch and remove the
screw holding it to the rotor of the motor.
12. Lift the centrifugal switch up and off the motor.
13. Lift the motor cover up and off the motor.
14. Pull the fan up and off the rotor.
If the windings are to be replaced, remove the left
side panel and control box cover.
1. Locate the auger drive motor wires plugged into
a relay on the circuit board.
2. Disconnect the auger motor’s wires and pull
them back to the auger drive motor.
3. Lift the auger motor windings off the gear
reducer.
August 1994
Page 27
Page 28
FDE470
August 1994
Page 28
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