Hoshizaki FM-170AFE User manual

NO. E2GA-734
ISSUED: MAY 18, 2007
REVISED:
HOSHIZAKI
MODULAR ICE MAKER
SERVICE MANUAL
MODEL FM-170AFE
FM-170AFE-N

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CONTENTS PAGE
I.SPECIFICATIONS ------------------------------------------------------------------------------------- 1
1.DIMENSIONS/CONNECTIONS----------------------------------------------------------------- 1
[a] FM-170AFE(-N)-------------------------------------------------------------------------------- 1
[b] WITH STORAGE BIN (B-300PG) ---------------------------------------------------------- 2
2.SPECIFICATIONS --------------------------------------------------------------------------------- 3
[a] FM-170AFE------------------------------------------------------------------------------------- 3
[b] FM-170AFE-N---------------------------------------------------------------------------------- 4
II.GENERALINFORMATION -------------------------------------------------------------------------- 5
1.CONSTRUCTION ---------------------------------------------------------------------------------- 5
2. OPERATION - How it works --------------------------------------------------------------------- 7
3. TIMER BOARD ------------------------------------------------------------------------------------- 8
[a] SOLID-STATE CONTROL ------------------------------------------------------------------- 8
[b] TIMER BOARD--------------------------------------------------------------------------------- 8
[c] SEQUENCE ------------------------------------------------------------------------------------ 9
III.MAINTENANCEANDCLEANINGINSTRUCTIONS -----------------------------------------12
1. EXTRUDING HEAD, HOUSING BEARING, AUGER BEARING ----------------------12
2. MECHANICAL SEAL---------------------------------------------------------------------------12
3. GEAR MOTOR -----------------------------------------------------------------------------------13
4. CONDENSER------------------------------------------------------------------------------------13
5.AIR FILTER ---------------------------------------------------------------------------------------13
6. WATER VALVE ---------------------------------------------------------------------------------14
7. CLEANING OF WATER SYSTEM-----------------------------------------------------------15
8. PERIODICAL CLEANING ---------------------------------------------------------------------17
IV.TECHNICALINFORMATION ---------------------------------------------------------------------18
1.WATERCIRCUITAND REFRIGERANTCIRCUIT -----------------------------------------18
2. CONTROL BOX -----------------------------------------------------------------------------------19
3.WIRINGDIAGRAM -------------------------------------------------------------------------------20
4.TIMINGCHART ------------------------------------------------------------------------------------21
[a] PRINCIPLE OF OPERATION --------------------------------------------------------------21
[b]PROTECTORS -------------------------------------------------------------------------------21
5. PERFORMANCE DATA-------------------------------------------------------------------------23
[a] FM-170AFE------------------------------------------------------------------------------------23
[b] FM-170AFE-N---------------------------------------------------------------------------------24
V. SERVICE DIAGNOSIS -----------------------------------------------------------------------------25
1. NO ICE PRODUCTION --------------------------------------------------------------------------25
2. LOW ICE PRODUCTION------------------------------------------------------------------------27
3. OTHERS --------------------------------------------------------------------------------------------27
VI. REMOVALAND REPLACEMENT OF COMPONENTS -----------------------------------29
1. SERVICE FOR REFRIGERANT LINES -----------------------------------------------------29
[a]SERVICEINFORMATION ------------------------------------------------------------------29

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[b] REFRIGERANTRECOVERY --------------------------------------------------------------30
[c] EVACUATIONAND RECHARGE---------------------------------------------------------30
2.BRAZING -------------------------------------------------------------------------------------------31
3. COMPRESSOR-----------------------------------------------------------------------------------31
4.DRIER -----------------------------------------------------------------------------------------------33
5. EXPANSION VALVE-----------------------------------------------------------------------------34
6. EVAPORATORASSEMBLY -------------------------------------------------------------------35
7.FAN MOTOR ---------------------------------------------------------------------------------------39
8. FLOAT SWITCH-----------------------------------------------------------------------------------39
9. CONTROL WATER VALVE---------------------------------------------------------------------40

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I. SPECIFICATIONS
1. DIMENSIONS/CONNECTIONS
[a] FM-170AFE(-N)

2
[b] WITH STORAGE BIN (B-300PG)

3
2. SPECIFICATIONS
[a] FM-170AFE
AC SUPPLY VOLTAGE
AMPERAGE
STARTING AMPERAGE
ELECTRIC CONSUMPTION
POWER FACTOR
POWER SUPPLY CAPACITY
1 phase 220-240V 50Hz 220-230V 60Hz
4.1A (Ambient temp. 32°C, Water temp. 21°C)
19.0A
620W (Ambient temp. 32°C, Water temp. 21°C)
66%
1.24kVA
ICE PRODUCTION PER 24h
Approx. 170 kg (Ambient temp. 10°C, Water temp. 10°C) Approx. 145 kg (Ambient temp. 21°C, Water temp. 15°C)
Approx. 120 kg (Ambient temp. 32°C, Water temp. 21°C)
WATER CONSUMPTION PER 24h Approx. 0.17 m3 (Ambient temp. 10°C, Water temp. 10°C)
Approx. 0.15 m3(Ambient temp. 21°C, Water temp. 15°C)
Approx. 0.12 m3(Ambient temp. 32°C, Water temp. 21°C)
SHAPE OF ICE
MAX STORAGE CAPACITY Flake Not applicable
DIMENSIONS (DRAWING No.)
EXTERIOR
INSULATION
CONNECTION - ELECTRIC
- WATER SUPPLY
- DRAIN
560(W) x 700(D) x 780(H) (mm)
Stainless Steel, Galvanized Steel (Rear)
Polyurethane Foam
Z-type Con.
Inlet G 3/4” (Connected at rear)
Outlet R 3/4” (Connected at rear)
ICE MAKING SYSTEM
HARVESTING SYSTEM Auger type Direct driven Auger (80W Gear Motor)
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
Hermetic Compressor 495W Model SC18G
Fin and Tube type forced air cooling
Copper Tube on Cylinder
Thermostatic Expansion Valve
R134a 390g
BIN CONTROL SYSTEM
ICE MAKING WATER CONTROL Mechanical Bin Control (Time Delay Controlled) Float Switch and Water Valve
ELECTRICAL PROTECTION
COMPRESSOR PROTECTION
GEAR MOTOR PROTECTION
LOW WATER PROTECTION
BIN CONTROL PROTECTION
Class I Appliance
6A Circuit Breaker
Auto-reset Overload Protector
Auto-reset Pressure Switch
Manual-reset Circuit Breaker
Auto-reset Thermal Protector
Float Switch and Timer
Mechanical Switch
WEIGHT
PACKAGE Net weight 75kg / Gross weight 87kg Carton 671mm(W) x 820mm(D) x 900mm(H)
ACCESSORIES Scoop, Installation Kit
OPERATION CONDITIONS
AMBIENT TEMP.
WATER SUPPLY TEMP
WATER SUPPLY PRESSURE
5 - 40°C
5 - 35°C
0.5 - 8 bar (0.05 - 0.8MPa)
We reserve the right to make changes in specifications and design without prior notice.

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[b] FM-170AFE-N
AC SUPPLY VOLTAGE
AMPERAGE
STARTING AMPERAGE
ELECTRIC CONSUMPTION
POWER FACTOR
POWER SUPPLY CAPACITY
1 phase 220-240V 50Hz 220-230V 60Hz
4.1A (Ambient temp. 32°C, Water temp. 21°C)
19.0A
640W (Ambient temp. 32°C, Water temp. 21°C)
68%
1.24kVA
ICE PRODUCTION PER 24h
Approx. 160 kg (Ambient temp. 10°C, Water temp. 10°C) Approx. 135 kg (Ambient temp. 21°C, Water temp. 15°C)
Approx. 110 kg (Ambient temp. 32°C, Water temp. 21°C)
WATER CONSUMPTION PER 24h Approx. 0.16 m3 (Ambient temp. 10°C, Water temp. 10°C)
Approx. 0.14 m3(Ambient temp. 21°C, Water temp. 15°C)
Approx. 0.11 m3(Ambient temp. 32°C, Water temp. 21°C)
SHAPE OF ICE
MAX STORAGE CAPACITY Nugget Not applicable
DIMENSIONS (DRAWING No.)
EXTERIOR
INSULATION
CONNECTION - ELECTRIC
- WATER SUPPLY
- DRAIN
560(W) x 700(D) x 780(H) (mm)
Stainless Steel, Galvanized Steel (Rear)
Polyurethane Foam
Z-type Con.
Inlet G 3/4” (Connected at rear)
Outlet R 3/4” (Connected at rear)
ICE MAKING SYSTEM
HARVESTING SYSTEM Auger type Direct driven Auger (80W Gear Motor)
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
Hermetic Compressor 495W Model SC18G
Fin and Tube type forced air cooling
Copper Tube on Cylinder
Thermostatic Expansion Valve
R134a 390g
BIN CONTROL SYSTEM
ICE MAKING WATER CONTROL Mechanical Bin Control (Time Delay Controlled) Float Switch and Water Valve
ELECTRICAL PROTECTION
COMPRESSOR PROTECTION
GEAR MOTOR PROTECTION
LOW WATER PROTECTION
BIN CONTROL PROTECTION
Class I Appliance
6A Circuit Breaker
Auto-reset Overload Protector
Auto-reset Pressure Switch
Manual-reset Circuit Breaker
Auto-reset Thermal Protector
Float Switch and Timer
Mechanical Switch
WEIGHT
PACKAGE Net weight 75kg / Gross weight 87kg Carton 671mm(W) x 820mm(D) x 900mm(H)
ACCESSORIES Scoop, Installation Kit
OPERATION CONDITIONS
AMBIENT TEMP.
WATER SUPPLY TEMP
WATER SUPPLY PRESSURE
5 - 40°C
5 - 35°C
0.5 - 8 bar (0.05 - 0.8MPa)
We reserve the right to make changes in specifications and design without prior notice.

5
II. GENERAL INFORMATION
1. CONSTRUCTION
Modular flaker models FM-170AFE and FM-170AFE-N include Water Supply, Evaporator,
Compressor, Condenser and Control Assemblies. As the unit is not equipped with an Ice
Storage Bin, this must be purchased separately as an optional extra.
Water Valve
Reservoir
Drier
Ice Chute
Control Box
Evaporator
Gear Motor
Fan Motor
Compressor

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ICE MAKING UNIT

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2. OPERATION - How it works
Potable water flows from the external supply tap and enters the water inlet on the machine,
passes through an electrically operated Water Valve before flowing into the Reservoir Tank.
FromtheTank,water flowsby gravityinto thebottom ofthe Evaporatortocompletelysurround
theAuger and fill the Evaporator with water to the same level as in the Reservoir Tank.
Water leakage at the bottom of the Evaporator is prevented by the use of a mechanical seal.
The Evaporator serves to change the water into ice by using a heat exchange process in
conjunction with the Compressor/Condenser assembly.
As water is used and turned into ice, the level in the Evaporator and the Reservoir Tank will
fall. Atapre-determinedlevel,adualactionFloatSwitchfittedtotheReservoirTankelectrically
commands the Water Valve to open and refill the Tank. This system functions therefore to
maintain a constant water level inside the Evaporator assembly.
The Auger, which is located inside the Evaporator is driven by an external Gear Motor
assembly. TherotatingAugercarriestheiceupwardswhereitispressedagainsttheExtruding
Head at the top of the Evaporator to remove excess water, before finally being extruded and
broken into irregular shapes and sizes of ice by the Flake/Nugget Cutter or into cubelet ice.
ThecontinuousflowoficeisthenpushedintotheIceSpoutandfallsbygravityintotheStorage
Bin below.
Moving the Operation Switch, located on the Control Box, to the “ON” position starts an
automatic and continuous icemaking process. When the Storage Bin has filled with ice, the
Bin Control Switch, located at the top of the Storage Bin, stops the icemaking process. When
ice is removed from the Storage Bin, the Bin Control Switch will automatically reset and
restart the icemaking process.

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3. TIMER BOARD
[a] SOLID-STATE CONTROL
1) An exclusiveHOSHIZAKIsolid-state control is employedinFM-170AFE and FM-170AFE-
N modular icemakers.
2) APrinted Circuit Board (hereafter called “Timer Board”) includes a stable and high-quality
controlsystem.
3) No adjustment is required.
[b] TIMER BOARD
CAUTION
1. Fragile,handlevery carefully.
2. AtimerboardcontainsCMOS(ComplementaryMetal-OxideSemiconductor)
integrated circuits, which are susceptible to failure due to static discharge. It
is especially important to either wear an anti-static wrist strap or touch a
metal part of the machine before servicing to be static free.
3. Do not touch the electronic devices on either side of the board to prevent
damage.
4. Do not change wiring and connections. Especially, never misconnect
terminals.
5. Do not repair the electronic devices or parts on the board in the field. Always
replace the whole board assembly when it fails.
The icemaker is controlled by the Timer Board for the following purposes:
1) To prevent the Gear Motor and the Compressor from starting or stopping simultaneously.
2) To reduce ice remaining in the Evaporator.
3) To protect the unit in case of low water and low water pressure.
4) To protect the unit from short cycling if the Bin Control resets quickly.

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[c] SEQUENCE
Fig. 1
Fig. 2

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Fig. 3
PART CODE 437305-02
MODEL H2AA144C02
RATING 24 VAC 50/60Hz
T160•}15 sec.
T290•}22 sec.
T3150•}45 sec.
T4Max. 1 sec.
T5Max. 0.25 sec.
T6Max. 1 sec.
CONTROL(CTL)
PROTECT(PRT)
X1 RELAY
(GEARMOTOR)
X2 RELAY
(COMPRESSOR)
Note: “T” (time) functions of the Timer Board are non-adjustable.

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Functions of Terminals
1) Terminals 1, 2
Power supplyAC 24V.
2) Terminals 3, 4
Control X1(GM) and X2(CM) Relays.
When closed, energize X1(GM) in 1 sec. and X2(CM) in 60 sec.
When opened, de-energize X1(GM) in 150 sec. and X2(CM) in 90 sec.
3) Terminals 5, 6
Control X1(GM) and X2(CM) Relays.
When opened, de-energize X1(GM) and X2(CM) immediately.
When closed, energize X1(GM) in 1 sec. and X2(CM) in 60 sec.
4) Terminals 7, 8, 9
X1(GM) contacts.
8 is a movable contact, 7 is a make contact, and 9 is a break contact.
5) Terminals 10, 11
Control X2(CM) Relay.
When opened, de-energize X2(CM) immediately.
When closed, energize X2(CM) immediately.
Note: 1.X2Relay is a single pole, normally open relay, and its terminals are mounted on the
relayitself.
2.The above operation times are median. See Fig. 3 for details.
3. GM = Gear Motor
CM = Compressor

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III. MAINTENANCE AND CLEANING INSTRUCTIONS
IMPORTANT
1. This icemaker must be maintained individually, referring to the instruction
manual and labels provided with the icemaker.
2. Tohavethe optimumperformanceofthisicemaker,thefollowingconsumable
parts need periodical inspection, maintenance and replacement:
Extruding Head (Top Bearing)
Housing (Lower Bearing)
Mechanical Seal
These parts should be inspected at least once a year or every 10,000 hours
of operation. Their service life ultimately depends on water quality and
environment, therefore more frequent inspection and maintenance may be
required.
1. EXTRUDING HEAD, HOUSING BEARING, AUGER BEARING
These parts should be replaced if a diametrical gap of more than 0.5 mm is found when at
least three spots are checked by changing the direction of theAuger on each Bearing.
It depends on the water quality and conditions, but normally the Bearings should be checked
for wear after a total of 8,000 - 10,000 hour operation from installation date.
Note: The clearance between theAuger blades and the Evaporator interior is 0.4 - 0.5 mm.
If the Bearings and rotating parts are worn out to create a larger clearance, the
Evaporator interior may be damaged. (The diameters differ by 0.8 - 1.0 mm.)
IftheAuger surfaces against whichtheBearings contact arenolonger smooth or show
any burrs or abrasions during the above inspection, replace the auger.
2. MECHANICAL SEAL
The Mechanical Seal prevents water leaks from between theAuger and the Housing Bearing
and gradually wears out to reduce its watertightness. Check the amount of water leakage
from the Drain Pipe located at the side of the Gear Case to determine the necessity of
replacement.
Total operation time Water leakage
3,000 hours 0.1 mL/h
10,000 hours 0.5 mL/h
Note: Thewaterleakagewillexceedtheaboveamountwithscale/dirtbuildupordamageon
the mating surface. Replace the Mechanical Seal when the water leakage exceeds
0.5mL/h.

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3. GEAR MOTOR
After the following hours of operation, check the Gear Motor for excessive noise caused by
increased torque or deterioration of mechanical parts.
Bearing, Gear and other mechanical parts: 10,000 hours
Oil seal: 5 years
Note: When the output shaft oil seal is exposed to a large amount of water at one time, water
may enter the Gear Case. Always drain the water circuit before removing theAuger
for service.
4. CONDENSER
Check the Condenser once a year, and clean if required by using a brush or vacuum cleaner.
More frequent cleaning may be required depending on the location of the icemaker.
5. AIR FILTER
A plastic mesh Air Filter removes dirt or dust from the air, and keeps the Condenser from
getting clogged. As the Filter gets clogged, the icemaker’s performance will be reduced.
Remove and clean theAir Filter at least twice per month:
1) Slide theAir Filter off the Louver.
2) Clean the Air Filter by using a vacuum cleaner.
When severely clogged, use warm water and a
neutral cleaner to wash theAir Filter.
3) Rinse and dry theAir Filter thoroughly, and place it
in position. Louver
Air Filter
Fig. 4

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6. WATER VALVE
1) Disconnect the power source.
2) Close the water supply tap.
3) Disconnect the Inlet Hose from the Water Valve.
4) Remove the Mesh Filter from the Water Valve.
5) Clean the Mesh using a brush.
6) Replace the Mesh and Inlet Hose in their correct positions.
7) Open the water supply tap.
8) Connect the power source.
9) Check for leaks.
Coil Do not remove
Filter Packing Inlet Hose
Fig. 5

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7. CLEANING OF WATER SYSTEM
WARNING
1. HOSHIZAKI recommends cleaning this unit at least twice a year. More
frequentcleaning,however,mayberequiredinsomeexistingwaterconditions.
2. Do not touch the Operation Switch with damp hands.
3. Always wear rubber gloves, eye protectors, apron, etc. for safe handling of
the cleaner and sanitiser.
4. Use the cleaners and sanitisers recommended by Hoshizaki. Contact your
local Hoshizaki office for further details. (The instructions below give an
example of those recommended cleaners and sanitisers.)
5. Never mix cleaning and sanitising solutions in an attempt to shorten cleaning
time.
6. Wipe off any splashed or spilt cleaner/sanitiser immediately.
7. Do not use any ammonia type cleaners on any part of the icemaker.
<STEP 1>
Dilute the solutions with water as follows:
Cleaning solution: “Nickel-Safe Ice Machine Cleaner” by The Rectorseal Corporation or
similar. Prepareapproximately 3Lofsolution asdirectedonthecontainer.
Sanitising solution:30 mL of 5.25% sodium hypochlorite with 7.6 L of water or the Hoshizaki
recommended sanitiser as directed on the container.
IMPORTANT
For safety and maximum effectiveness, use the solutions immediately after
dilution.
<STEP 2>
Use the cleaning solution to remove lime deposits in the water system.
1) Open the PlasticAccess Flap on the Front Panel.
2) Press the Stop Button to activate the flush cycle (approx. 10 minutes).

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3) Remove all ice from the Storage Bin to avoid contamination by the cleaner.
4) Unplug the icemaker. Remove the Top and Front Panels.
5) Remove the Cover of the Reservoir. Remove any loose debris or scale.
6) Carefully fill theReservoirwith the solution to the overflowpoint. Ifnecessary, use a small
brush to clean the inside of the Reservoir.
7) Refit the Reservoir Cover.
8) Check that the Operation Switch is in the “RUN” position.
9) Loose fit the Front and Top Panels.
10) Allow the icemaker to stand for about 10 minutes, then plug in the icemaker to make ice
withthe solution.
11) With the water supply tap open, allow the machine to continue icemaking for a further 20
minutes. Open theAccess Flap and press the Stop Button.
12) Allow time for the Gear Motor to stop and the water system to drain.
13) Unplug the icemaker.
14) Refit the Top and Front Panels. Plug in the icemaker.
15) Allow the icemaker to make ice for approximately 10 minutes.
16) Pour warm water into the Storage Bin to melt any ice down the drain.
Note: 1. Ifthe machine hasheavydeposits of scale,repeatthe complete cleaning procedure.
2. Do not increase the proportion of cleaning solution to shorten cleaning times, as this
may lock theAuger when completing item 10).
<STEP 3>
Note: Sanitising should always be completed after cleaning or alternately as an individual
procedure if conditions exist to make it necessary.
Use 2.8 lit. of the sanitising solution to sanitise the icemaker.
17) Follow items 1) to 16) to complete sanitisation of the water system.

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8. PERIODICAL CLEANING
1) Machine and Bin Exterior
Wipe the exterior at least once per week with a clean, soft cloth. Use a damp cloth containing
a neutral cleaner to wipe off grease or dirt.
2) Storage Bin Interior Cleaning/Sanitisation (as required)
1) Open the Storage Bin Door, and remove all ice.
2) WashtheBinLiner,IceDeflectorandDoorinnersurfacewithaneutralnon-abrasivecleaner.
Rinse thoroughly with a clean cloth and fresh water.
3) Mix5litresofwaterwith18mLof5.25%sodiumhypochloritesolutioninasuitablecontainer
or the recommended Hoshizaki sanitiser as directed.
4) Soak a clean sponge or cloth with the solution and wipe all the surfaces of the Bin Liner,
Ice Deflector and Door inner surface.
5) Rinse thoroughly with fresh water and a clean cloth to wipe off the solution. Close the Bin
Door.
Note: Some solutions may cause damage to the Bin liner surfaces or corrosion on the metal
parts. Always rinse the sanitiser unless directed otherwise by Hoshizaki guidelines.