Scotsman FM2402 User manual

INTRODUCTION
To the owner or user: The service manual you are
reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.
This product contains 2 separate ice making
systems in one cabinet.
The FM2402 is a modular ice system that fits a
variety of Scotsman ice storage bins.
It features: front service for the freezer, gearmotor,
control box, water reservoir, and bin control; an
electronic circuit for monitoring ice and water level;
a thermostatic expansion valve; and R-22 as the
refrigerant.
TABLE OF CONTENTS
Installation
For the Installer
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Storage Bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Removal and Replacement
Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
FM2402
August 1993
Page 1

FOR THE INSTALLER
The FM2402 is designed to fit
the following Scotsman storage
bins:
B90 and extensions
(with bin top KBT18)
BH800 no bin top required.
BH900 using bin top KBT14.
BH1360, no bin top required.
When installing a new system,
check to be sure that you have
everything you need before
beginning:
Correct Bin
Correct Ice Machine
Correct Bin Top (if required)
All kits, legs, and
information required for the
specific job.
Model
Number
FM2402AE-32A
FM2402WE-32A
FM2402AE-3A
FM2402WE-3A
Dimensions
(w/o bin)
H X W X D
27" x 42" x 24"
same
same
same
Basic
Electrical
208-230/60/1
same
208-230/60/3
same
Ice
Type
FLAKE
same
same
same
Condenser
Type
Air
Water
Air
Water
The normal finish for the ice machine is
enamel-sandalwood. A stainless steel panel kit,
SPKFM42 may be field installed to convert the unit
to a stainless steel finish.
Electrical Inlet
3"
Water Inlet 3/8" Flare
Drain 3/4" FPT
BACK VIEW
Note: Allow 6" behind and
6" above the unit for air
circulation, utility
connections, and service.
Ice Chute
2.64" x 6.2"
Condenser Inlet (W/C):
3/8" FPT
9.5"
Condenser Drain (W/C):
1/2" FPT
18.9"
18.74"
15.8"
5.25"
14.9"
TOP VIEW
34.84"
18.28"
6"
13.84"
SPECIFICATIONS: ICE MAKER
Refrigerant Charge*
Air Cooled 32 oz.
R-22
Water
Cooled 28 oz. R-22
* Per system. Always go
by the nameplate.
FM2402
August 1993
Page 2

Installation Limitations:
This ice system is designed to be installed indoors,
in a controlled environment:
Min Max
Air Temperature 500F 1000F
Water Temperature 400F 1000F
Water Pressure 20 PSI 80 PSI
Voltage -5% +10%
(Compared to the nameplate)
Operating the machine outside of the limitations is
misuse and can void the warranty.
Water Limitations:
An ice machine is a food manufacturing plant; it
takes a raw material, water, and turns it into a food
product, ice. The purity of the water is very
important in obtaining pure ice and in maximizing
product life. This is not intended as a complete
resource for water related questions, but it does
offer these general recommendations:
1. Check with a water treatment specialist for a
water test, and recommendations regarding filters
and treatment.
2. In most cases, the water used to make ice
should be filtered or treated, depending upon the
water.
There is no one type of water filter that will
be effective in all situations.
That is why a water
test is important.
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 assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of any part and/or other components not
specifically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and design are subject to change
without notice.
FOR THE INSTALLER: Environmental Limitations
1.25" 21.12" Drain
3/4"
FPT
Typical Storage Bin - B90
FM2402
August 1993
Page 3

FOR THE INSTALLER
Location:
After uncrating and inspection, the unit is ready for
installation. It is important that the machine be
installed in a location where it has enough space
around it to be accessible for service, and
minimum of 6" be allowed at the back for air
circulation on air cooled models. Try to avoid hot,
dirty and crowded locations. Be sure that the
location for the machine is within the limitations
described on page 3.
Storage Bin:
Tip the storage bin on its back, using parts of the
carton to protect the exterior finish. Install the legs
into the threaded holes in the bottom of the bin.
Turn the leg levelers all the way in preparation for
leveling later. Return the bin to the upright
position, remove paper covering the bin gasket.
Note: Do not push bin into position, but lift it there.
Pushing a bin, especially one with ice in it, can
cause damage to the legs and the leg mounts.
Install the appropriate bin top on the bin, according
to the instructions for the bin top.
Ice Maker:
The machine is heavy, so the use of a mechanical
lift is recommended for lifting the machine high
enough to install on top of the bin. After the unit is
placed on the bin, line it up so it is even with the
back side. Secure the machine to the bin with the
hardware provided with the machine.
Remove the front panel and remove any shipping
blocks.
Typical Storage Bin with Extension and Bin Top
FM2402
August 1993
Page 4

FOR THE INSTALLER: Location
ALLOW ROOM
FOR AIR
CIRCULATION
AND SERVICE
ACCESS
DO NOT STACK ANYTHING IN
FRONT OF THE MACHINE(S)
FM2402
August 1993
Page 5

FOR THE PLUMBER
CONFORM TO ALL APPLICABLE CODES
Water Inlet
Air Cooled Models: The recommended water
supply is clean, cold water. Use 3/8" O.D. copper
tubing, and connect to the single 3/8" male flare at
the back of the cabinet. This connection supplies
water to both ice making systems. Install a hand
valve near the machine to control the water supply.
Water Treatment: In most areas, a water filter of
some type will be useful. In areas where the water
is highly concentrated with minerals the water
should be tested by a water treatment specialist,
and the recommendations of the specialist
regarding filtration and/or treatment should be
followed.
Water Cooled Models: A separate 3/8" O.D.
copper line is recommended, with a separate hand
valve to control it. It is connected to a single 3/8"
FPT condenser inlet at the back of the cabinet.
This connection supplies water to both water
cooled condensers. The water pressure to all lines
must always be above 20 psig, and below 80 psig.
Drains
Air Cooled Models: There is one 3/4" FPT drain
for both ice making systems at the back of the
cabinet, the drain line is of the gravity type, and 1/4
inch per foot fall is an acceptable pitch for the drain
tubing. There should be a vent at the highest point
of the drain line, and the ideal drain receptacle
would be a trapped and vented floor drain. Use
only 3/4" rigid tubing.
Water Cooled Models: In addition to the above
mentioned drain, a separate condenser drain must
be installed. There is one drain for both ice
making systems. Connect it to the 1/2" condenser
drain connection at the back of the cabinet.
Storage Bin: A separate gravity type drain needs
to be run, similar to the air cooled drain. Insulation
of this drain line is recommended.
COMPLETE PLUMBING INSTALLATION, WATER
COOLED
WATER
COOLED
HAND
VALVE
CONDENSER
INLET
WATER
FILTER CONDENSER
DRAIN
VENTED
DRAIN
AIR COOLED
MODELS
HAND
VALVE
FIELD
SUPPLIED
FILTER
WATER
INLET VENTED
DRAIN
FM2402
August 1993
Page 6

FOR THE ELECTRICIAN
CONFORM TO ALL APPLICABLE CODES
The electrical power to the unit is supplied through
the junction box at the rear of the machine.
Check the nameplate (located on the back panel)
for the voltage requirements, and for the minimum
circuit ampacity. The machine requires a solid
chassis to earth ground wire.
The ice maker should be connected to its own
electrical circuit so it would be individually fused.
Voltage variation must remain within design
limitations, even under starting conditions.
All external wiring must conform to national,
state, and local electrical codes. The use of a
licensed electrician is required to perform the
electrical installation.
WATER COOLED
AIR COOLED
POWER
SUPPLY
FM2402
August 1993
Page 7

FOR THE INSTALLER Final Check List
1. Is the ice system installed indoors in a location
where the air and water temperatures are
controlled, and where they do not exceed the
design limitations?
2. Is there an electrical service disconnect within
sight of the installed machine? Has the voltage
been checked, and compared to nameplate
requirements?
3. Have all the plumbing connections been made
and checked for leaks?
4. Has the machine and bin been leveled?
5. Is there a minimum of 6" clearance at the back
of the machine for proper service access and air
circulation?
6. Is the water pressure a minimum of 20 psig?
7. Has the machine been secured to the bin?
8. Is there clearance above the top of the machine
for service access?
9. Is there a water shut off valve installed near the
machine?
10. Have all of the shipping blocks been removed?
FM2402
August 1993
Page 8

START UP Pre-Start Inspection
1. Remove the front and side service panels.
2. Check that the styrofoam shipping blocks have
been removed.
3. Inspect the interior of the machine for loose
screws or wires. Check that no refrigerant lines
are rubbing each other. Check that the fan blade
turns freely (air cooled).
4. Check that the unit is installed correctly
according to the final check list (page 8).
Start Up
1. Go through the prestart inspection.
2. Open the hand valve, observe that water enters
the water reservoir, fills the tube from the reservoir
to the evaporator, and then shuts off. Check for
leaks.
3. Switch the master switch on.
The electrical start up sequence is now on
automatic.
A. There should be a short (15 second) delay
before the gearmotor starts.
B. After the gearmotor starts, the compressor will
start.
4. On air cooled models, the condenser will begin
to discharge warm air, on water cooled models,
the water regulating valve will open, and warm
water will be discharged into the drain.
5. The unit should soon be making ice, if desired,
the low side pressure of each system may be
checked: it should be 25 psig + or - 2 PSIG.
The suction line temperature at the compressor is
normally very cold, nearly to the point of frost up to
the compressor body, but not on it.
The air cooled discharge pressure will depend
upon air and water temperatures, but should be
between 200 psig and 280 psig.
The water cooled discharge pressure should be
constant at about 220 psig.
The above numbers are for new, clean machines,
you can expect to see some values higher, and
some lower between different units.
6. THERE ARE NO ADJUSTMENTS TO MAKE,
so replace the panels.
7. Clean and/or sanitize the storage bin interior,
wipe off the exterior with a clean, damp cloth.
8. Give the owner/user the service manual, instruct
him/her in the operation of the unit, and make sure
they know who to call for service.
9. Fill out the manufacturers registration card, and
mail it to Scotsman.
10. Fill out the field quality audit form, and mail it to
the Scotsman factory.
The following procedure applies to each of the two separate ice making systems.
FM2402
August 1993
Page 9

COMPONENT DESCRIPTION
Control Box: Contains the electrical controls that
operate the machine.
High Pressure Cut Out Switch: A manual reset
switch sensing the high side refrigeration pressure.
It is set to shut the machine off, and illuminate the
reset switch light if the discharge pressure should
ever exceed 400 psig.
Evaporator: A vertical stainless steel tube,
refrigerated, and water filled. In it there is a
stainless steel auger.
Compressor: The refrigerant vapor pump.
Reservoir: Float operated, it maintains the water
level in the evaporator at a constant level, it also
contains the water level sensor.
Water Level Sensor: Senses if there is water in
the reservoir to make ice out of. Will shut the
machine off it there is none.
Ice Discharge Chute: Directs the ice produced
by the evaporator into the storage bin.
Ice Level Sensor: An electronic "eye", it senses
the presence of ice in the bottom of the ice
discharge chute. Operates to turn the ice machine
on and off automatically as the level of ice in the
bin changes.
Gear Motor: An oil filled, speed reduction
gearbox, driving the auger.
Drain Tube: When uncapped and lowered, drains
the evaporator.
Condenser: Air or water cooled, where the heat
removed in ice making is discharged.
Expansion valve: The refrigerant metering
device.
AIR COOLED
CONTROL
BOXES
CONDENSERS
EXPANSION
VALVES
RESERVOIRS
ICE CHUTES
COMPRESSOR
ICE LEVEL
SENSORS
CONTROL
BOXES
HIGH
PRESSURE
CUT OUT
WATER
COOLED
There are two of each of the above components in the FM2402.
FM2402
August 1993
Page 10

COMPONENT DESCRIPTION: Control Box
Contactor: A definite purpose contactor
connecting the compressor and the remote
condenser fan motor to the power supply.
Circuit Board: Controlling the ice machine
through sensors and relays. The sensors are for
ice level and water level. The relays are for the
gear motor (with a built in time delay to clear the
evaporator of ice when the unit turns off) and for
the liquid line valve.
Transformer: Supplies low voltage to the circuit
board.
Low Pressure Cut Out Switch: A manual reset
control that shuts off the ice machine when the low
side pressure drops below a preset point, 0-4 psig.
Potential Relay: The compressor start relay.
On/Off Switch: Manual control for the machine.
ON/OFF SWITCH
LOW
PRESSURE
CUT OUT
SWITCH
POTENTIAL
RELAY
TRANSFORMER
CONTACTOR
CIRCUIT
BOARD
FM2402
August 1993
Page 11

COMPONENT DESCRIPTION
Evaporator: A refrigerated vertical tube filled with
water and containing a water seal and auger.
Auger: A solid stainless steel double spiral auger,
it pushes the ice crystals up to the top of the
evaporator.
Water Seal: A two part "face" seal, the top half
rotating with the auger, the bottom half stationary,
the sealing action being where the two seal "faces"
meet.
Ice Sweep: A plastic cap with "fingers". It revolves
with the auger to "sweep" the ice into the ice chute.
Breaker (Divider): Where the ice is compressed
and much of the extra water is squeezed out of it
before it is discharged into the bin.
Motor: A split phase motor that drives the gear
reducer.
Thrust Bearing: As the ice is pushed up the
evaporator, the auger is thrust down, and pressure
from the auger thrust is taken up by this bearing.
WATER
SEAL
ICE SWEEP
BEARING
BREAKER/DIVIDER
AUGER
EVAPORATOR
MOTOR
FM2402
August 1993
Page 12

ELECTRICAL SEQUENCE
Refer the wiring diagram as needed.
The following description applies to either one of
the two ice making systems. They operate
independently of each other.
If the machine is switched off at the master switch,
but is otherwise ready to go, switching the master
switch to on does the following:
••The bin empty light on the circuit board goes on
••There is a 15 second delay
••If there is enough water in the reservoir, the
circuit board will allow the machine to start up.
Start up consists of:
••The compressor relay and auger motor relay
become energized, connecting power to the
windings of the auger motor.
••The auger motor starts, and the centrifugal
switch closes, connecting power to the
compressor contactor coil.
••The contactor is energized, connecting power
to the compressor, and the compressor starts.
••As ice goes past the ice level sensors, the bin
empty light will stay on, and the machine will
continue to run, unless the ice stays between
the sensors for more than 15 seconds (bin full).
At that point, the bin empty light goes out, and
the machine shuts down.
Shut Down consists of:
••The compressor relay opens.
••The compressor contactor opens
••The compressor stops
••The auger motor is run by the circuit board for 2
more minutes, clearing out ice in the
evaporator, and then
••The auger motor relay opens, and the auger
motor stops.
If the ice level sensor is clear (bin empty) for more
than 15 seconds, the machine will start up again.
Another purpose of the circuit board is to turn the
machine off if there is not enough water in the
machine.
••When the water level in the reservoir falls
below the water level sensor, the machine will
"shut down"
••When the water refills the reservoir, the
machine will start up again.
Separate from the circuit board:
••If the high pressure control (cut out switch)
opens, the machine will stop immediately
(through the relays on the circuit board). It must
be manually reset at the control .
••If the low pressure control (cut out switch)
opens, the machine will stop immediately
(through the relays on the circuit board). It must
be manually reset at the control.
••If the spout switch opens, the machine will stop
immediately (through the relays on the circuit
board). The spout switch must be manually
reset.
••Each master switch is the manual control for
each system, but it is not a service disconnect.
FM2402
August 1993
Page 13

OPERATION: Water Water enters the machine through the 3/8" male
flare at the rear of the cabinet, splits into two
separate lines, flows to a strainer at each reservoir
and then to each water reservoir which it enters
through the float valve. The water then goes out
the bottom of the reservoir tanks to the bottom of
each evaporator.
Reservoir overflow or evaporator condensation is
routed to the drain.
Water cooled models have a separate water circuit
for the cooling water: it enters the fitting at the rear,
divides and goes to the two water regulating
valves, then through each water cooled
condenser, reconnects into one drain and down
the drain.
ADJUSTMENT OF WATER LEVEL
EVAPORATOR
DRAIN
WATER
LEVEL
EVAPORATOR
ICE
CHUTE
DRAIN
STRAINER
WATER SCHEMATIC
RESERVOIR
WATER INLET
EVAPORATOR INLET
FM2402
August 1993
Page 14

OPERATION: Refrigeration
Beginning at the compressor, the refrigerant is
compressed into a high temperature gas. The
discharge line directs this gas to the condenser.
At the condenser (air or water cooled) the gas is
cooled by either air or water and it then condenses
into a liquid. This high pressure liquid then goes
through the liquid line to the expansion valve. The
thermostatic expansion valve meters liquid
refrigerant into the evaporator, the volume of liquid
refrigerant depending upon the temperature of the
evaporator; warmer evaporators get more
refrigerant and colder evaporators get less.
At the evaporator, the refrigerant enters an area of
relatively low pressure, where it can easily "boil
off" or evaporate. As it evaporates, it absorbs heat
from the evaporator and whatever is in contact
with it (such as the water inside it). After the
evaporator, the refrigerant, now a low pressure
vapor, goes through the suction line back to the
compressor, where the cycle is repeated.
CONDENSER
FAN
MOTOR
LIQUID
LINE
THERMOSTATIC
EXPANSION
VALVE
SUCTION LINE
EVAPORATOR
GEAR
MOTOR
COMPRESSOR
HIGH PRESSURE
CUT OUT SWITCH
DISCHARGE
LINE
Refrigeration Schematic
The following description applies to each of the two separate ice making systems.
FM2402
August 1993
Page 15

MAINTENANCE AND CLEANING
A Scotsman Ice System represents a sizable investment of time and money in any company’s
business. In order to receive the best return for that investment, it MUST receive periodic
maintenance.
It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always
preferable, and less costly in the long run, to avoid possible down time by keeping it clean;
adjusting it as needed; and by replacing worn parts before they can cause failure. The following
is a list of recommended maintenance that will help keep the machine running with a minimum of
problems.
Maintenance and Cleaning should be scheduled at a minimum of twice per year.
WARNING
Electrical power will be ON when doing in
place cleaning. Switch it OFF before
completing the cleaning procedures.
ICEMAKING SYSTEM: In place cleaning
1. Check and clean any water treatment devices,
if any are installed.
2. Remove screws and the front panel.
3. Move the ON-OFF switch to OFF.
4. Remove all the ice from the storage bin.
5. Remove the cover to the water reservoir and
block the float up.
6. Drain the water reservoir and freezer assembly
using the drain tube attached to the freezer water
inlet. Return the drain tube to its normal upright
position and replace the end cap.
WARNING
Scotsman Ice Machine Cleaner contains acids.
These compounds are corrosive and 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. Prepare the cleaning solution: Mix eight
ounces of Scotsman Ice Machine Cleaner with
three quarts of hot water. The water should be
between 90-115 degrees F.
8. Slowly pour the cleaning solution into the water
reservoir until it is full. Wait 15 minutes, then
switch the master switch to ON.
9. As the ice maker begins to use water from the
reservoir, continue to add more cleaning solution
to maintain a full reservoir.
10. After all of the cleaning solution has been
added to the reservoir, and the reservoir is nearly
empty, switch the master switch to OFF.
11. After draining the reservoir, as in step 6, wash
and rinse the water reservoir.
12. Remove the block from the float in the water
reservoir.
13. Switch the master switch to ON
14. Continue ice making for at least 15 minutes, to
flush out any cleaning solution. Check ice for acid
taste - continue icemaking until ice tastes sweet.
WARNING
DO NOT USE any ice produced from the
cleaning solution. Be sure no ice remains in
the bin.
15. Remove all ice from the storage bin.
16. Add warm water to the ice storage bin and
thoroughly wash and rinse all surfaces within the
bin.
17. Sanitize the bin interior with an approved
sanitizer using the directions for that sanitizer.
18. Replace the front panel.
The FM2402 is made up of two separate ice makers; to properly clean and maintain the FM2402, these
steps must be followed for both systems.
FM2402
August 1993
Page 16

WARNING
Disconnect electrical power before beginning.
1. The bin control uses devices that sense light,
therefore they must be kept clean enough so that
they can “see”. At least twice a year, remove the
bin control sensors from the base of the ice chute,
and wipe the inside clean, as illustrated.
2. The ice machine senses water level by a probe
located in the water reservoir. At least twice a
year, the probe should be removed from the
reservoir, and the tip wiped clean of mineral
build-up.
3. The bearing in the breaker should also be
checked at least two times per year.
A. Check the bearing by:
••removing the ice chute cover
••unscrewing the ice sweep
••removing the water shed
••unscrewing the breaker cover.
••unscrewing the auger stud
Inspect the assembly, looking for wear.
See Removal and Replacement to replace
bearing or seals. Reverse to reassemble.
4. Check and tighten all bolts and screws.
CLEAN THE
WATER LEVEL
PROBE
PULL UP TO
REMOVE PROBE
RESERVOIR
///////////////////////////////////////////
CAUTION: THE TIP IS
MADE OF GLASS
//////////////////////////////////////////
ICE LEVEL SENSORS:
SLIDE TO REMOVE
CLEAN THE
LIGHT SENSORS
MAINTENANCE AND CLEANING
ICE SWEEP
BREAKER
COVER
The FM2402 is made up of two separate ice makers; to properly clean and maintain the FM2402, these
steps must be followed for both systems.
FM2402
August 1993
Page 17

5. Clean each air cooled condenser. Use a vacuum
cleaner or coil cleaner if needed. Do NOT use a wire
brush.
WARNING
Disconnect electrical power.
A. Remove top panel.
C. Pull fan motor assembly off of locating pins and
out of the unit.
B. Remove two screws, and unplug the fan motors.
D. Clean the condenser; reassemble by placing
the fan motor assembly onto the locating pins,
replacing the mounting screws, plugging the fan
motors back in, and replacing the top panel.
Reconnect power.
TOP
PANEL
FAN MOTOR
ASSEMBLY
CAP SCREW
LOCATING
PINS
UNPLUG
LEADS
MAINTENANCE: Air Cooled
FM2402
August 1993
Page 18

In some areas the water supply to the icemaker
will have a great deal of minerals in it, and that will
result in an evaporator and auger becoming
coated with these minerals, requiring a more
frequent removal than twice per year. If in doubt
about the condition of the evaporator and auger,
the auger can be removed so the parts can be
inspected.
Note: Water filters can filter out suspended solids,
but not dissolved solids. “Soft” water may not be
the complete answer. Check with a water
treatment specialist regarding water treatment.
For more information on removal of these
parts, see REMOVAL AND REPLACEMENT.
WARNING
Shut off electrical power and water supply.
1. To remove the auger, remove the front and top
panels.
2. Remove 3 hex studs holding ice chute cover to
ice chute, and remove cover.
3. Unscrew and remove ice sweep.
4. Loosen band clamp under ice chute, and
remove ice chute from evaporator.
5. Remove 4 allen screws holding breaker to
evaporator.
6. Drain the evaporator by pulling down and
uncapping the evaporator drain tube.
7. Pull up to remove auger.
After the auger has been removed, allow the auger
to dry: if the auger is not bright and shiny, it must
be cleaned.
Clean the auger and evaporator as required. DO
NOT HONE THE EVAPORATOR.
8. Replace the water seal.
9. Reverse to reassemble.
MAINTENANCE AND CLEANING: Auger
ALLEN
SCREWS
BREAKER &
BEARING &
AUGER
ASSEMBLY
/////////////WARNING///////////////
The auger has sharp
edges, handle with care.
////////////////////////////////////////////
FM2402
August 1993
Page 19

SERVICE DIAGNOSIS: Condition - No Ice Being Produced
STATUS: NOTHING OPERATES
A. Check:Voltage to the unit, restore it if there is none. Compare to the nameplate.
B. Check:The master switch, switch ON if off.
C. Check:The 3 reset switches, (spout, high and low pressure): depress and release each switch. If
the still does not start, check: the spout switch; the high and the low side pressures.
D. Check the low pressure cut out, if closed, go to E; if it is open, it could be due to:
••Low refrigerant charge
••The auger not turning
••Restricted system
••TXV not opening
1. Check the low side pressure, the low pressure cut out opens at pressure below 4 psig.
If open, reset and:
a. Check if the auger is turning, if it is not, remove the gearbox and:
Check for internal damage, repair and replace in the machine.
b. Check for low charge, add some refrigerant, if the unit will operate,(normal
low side pressure being about 25 psig) stop and look for a leak, recover, repair, replace the
drier, evacuate, and weigh in the nameplate charge. If, with added charge, the unit
does not operate:
Check for a restricted system, replace the drier, evacuate, and weigh in a
nameplate charge.
Check for a Thermostatic Expansion Valve that does not open, if defective,
replace it. Replace the drier, evacuate, and weigh in the nameplate charge.
E. Check the high pressure cut out, if closed, go to F; if open check:
1. The pressure control opens at 400 psig. Check the high side pressure, reset the control,
and observe: on water cooled, that water soon begins to flow from the condenser drain;
or, on air cooled, that the fan is forcing air through the condenser. If the unit trips out on
pressures below 400 psig, replace the control. If the pressures rise above the trip out
point, and the unit shuts down:
a. Check for adequate water flow on water cooled, if adequate, clean the interior
of the condenser. If the pressures are still too high replace the water regulating valve.
b. Check for adequate air flow on air cooled. Clean the condenser and (if used) the
filter. If the air flow is poor because of the installation, advise the user that the unit
should be moved, or the air around it kept cooler.
Check the fan motor for tight bearings and proper rotation.
Check that the fan blades are clean, and the fan secure to the fan motor shaft.
F. Check the spout switch. It opens from excess pressure of ice inside the ice chute: this should only
happen when the machine does not shut off when the ice storage bin is full. If the spout switch is
closed, check G.
G. Check the water level in the reservoir. The machine will not run if there is not enough water in the
reservoir. 1. Restore/adjust water level. See the next step.
FM2402
August 1993
Page 20