Hoshizaki FM-170EE-HC User manual

NO. E2EB-814
ISSUED: AUG. 21, 2010
REVISED:
SERVICE MANUAL
HOSHIZAKI
MODULAR ICE MAKER
MODEL FM-170EE-HC
FM-170EE-HCN
FM-170EE-50-HC
FM-170EE-50-HCN

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CONTENTS PAGE
I. SPECIFICATIONS -------------------------------------------------------------------------------------1
1. DIMENSIONS/CONNECTIONS ----------------------------------------------------------------1
[a] FM-170EE-HC, FM-170EE-HCN-----------------------------------------------------------1
[b] FM-170EE-50-HC, FM-170EE-50-HCN --------------------------------------------------2
2. SPECIFICATIONS----------------------------------------------------------------------------------3
[a] FM-170EE-HC ----------------------------------------------------------------------------------3
[b] FM-170EE-HCN --------------------------------------------------------------------------------4
[c] FM-170EE-50-HC ------------------------------------------------------------------------------5
[d] FM-170EE-50-HCN----------------------------------------------------------------------------6
II. GENERAL INFORMATION -------------------------------------------------------------------------7
1. CONSTRUCTION ----------------------------------------------------------------------------------7
2. OPERATION - How it works ------------------------------------------------------------------- 10
3. TIMER BOARD------------------------------------------------------------------------------------ 11
[a] SOLID-STATE CONTROL ----------------------------------------------------------------- 11
[b] TIMER BOARD ------------------------------------------------------------------------------- 11
[c] SEQUENCE ----------------------------------------------------------------------------------- 12
III. INSTALLATION INSTRUCTIONS -------------------------------------------------------------- 15
1. UNPACKING--------------------------------------------------------------------------------------- 15
2. LOCATION ----------------------------------------------------------------------------------------- 16
3. INSTALLATION ----------------------------------------------------------------------------------- 17
4. ELECTRICAL CONNECTIONS --------------------------------------------------------------- 17
5. WATER SUPPLY AND DRAIN CONNECTIONS ----------------------------------------- 19
IV. OPERATING INSTRUCTIONS ----------------------------------------------------------------- 20
1. START UP ------------------------------------------------------------------------------------------ 20
2. PREPARING THE ICEMAKER FOR LONG STORAGE-------------------------------- 21
V. MAINTENANCE ------------------------------------------------------------------------------------- 22
1. PERIODICAL CLEANING ---------------------------------------------------------------------- 22
2. CLEANING OF WATER SYSTEM ----------------------------------------------------------- 24
VI. TECHNICAL INFORMATION-------------------------------------------------------------------- 28
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT--------------------------------------- 28
2. WIRING DIAGRAM ------------------------------------------------------------------------------ 29
3. TIMING CHART----------------------------------------------------------------------------------- 30
[a] PRINCIPLE OF OPERATION------------------------------------------------------------- 30
[b] PROTECTORS ------------------------------------------------------------------------------- 30
4. PERFORMANCE DATA------------------------------------------------------------------------- 32
[a] FM-170EE-HC, FM-170EE-50-HC------------------------------------------------------- 32
[b] FM-170EE-HCN, FM-170EE-50-HCN -------------------------------------------------- 33
VII. SERVICE DIAGNOSIS--------------------------------------------------------------------------- 34
1. NO ICE PRODUCTION ------------------------------------------------------------------------- 34

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2. LOW ICE PRODUCTION----------------------------------------------------------------------- 36
3. OTHERS-------------------------------------------------------------------------------------------- 36
VIII. REMOVAL AND REPLACEMENT OF COMPONENTS -------------------------------- 38
1. REFRIGERATION CIRCUIT------------------------------------------------------------------- 38
[a] APPLICABLE PARTS ----------------------------------------------------------------------- 38
[b] SERVICE INSTRUCTIONS --------------------------------------------------------------- 38
[c] REFRIGERANT------------------------------------------------------------------------------- 38
[d] COMPRESSOR ------------------------------------------------------------------------------ 39
[e] EVAPORATOR CASING ------------------------------------------------------------------- 39
[f] CONDENSER---------------------------------------------------------------------------------- 39
[g] CONDENSER COOLING FAN MOTOR ----------------------------------------------- 39
[h] DRIER------------------------------------------------------------------------------------------- 39
[i] THERMOSTATIC EXPANSION VALVE-------------------------------------------------- 40
2. EVAPORATOR ASSEMBLY ------------------------------------------------------------------- 40
3. FAN MOTOR--------------------------------------------------------------------------------------- 42
4. FLOAT SWITCH ---------------------------------------------------------------------------------- 42
5. CONTROL WATER VALVE -------------------------------------------------------------------- 43

1
I. SPECIFICATIONS
1. DIMENSIONS/CONNECTIONS
[a] FM-170EE-HC, FM-170EE-HCN

2
[b] FM-170EE-50-HC, FM-170EE-50-HCN

3
2. SPECIFICATIONS
[a] FM-170EE-HC

4
[b] FM-170EE-HCN

5
[c] FM-170EE-50-HC

6
[d] FM-170EE-50-HCN

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II. GENERAL INFORMATION
1. CONSTRUCTION
Self-contained flaker models FM-170EE-HC, FM-170EE-HCN, FM-170EE-50-HC
and FM-170EE-50-HCN include Water Supply, Evaporator, Condensing and Control
Assemblies.
Power Supply Cord
Air Filter
Top Panel
Door
Front Panel (Left)
Front Cover
Louver
Spout
Evaporator
Reservoir
Compressor
Gear Motor
Fan Motor
Bin Control Switch
Drainboard
Circuit Breaker
Control Box
Condenser

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ICE MAKING UNIT [FM-170EE-HC, FM-170EE-50-HC]

9
ICE MAKING UNIT [FM-170EE-HCN, FM-170EE-50-HCN]

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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 owing into the
Reservoir Tank. From the Tank, water ows by gravity into the bottom of the Evaporator
to completely surround the Auger and ll 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. At a pre-determined level, a dual action Float Switch tted to the Reservoir Tank
electrically commands the Water Valve to open and rell 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. The rotating Auger carries the ice upwards where it is pressed against the
Extruding Head at the top of the Evaporator to remove excess water, before nally being
extruded and broken into irregular shapes and sizes of ice by the Flake/Nugget Cutter
or into cubelet ice.
The continuous ow of ice is then pushed into the Ice Spout and falls by gravity into the
Storage 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 lled 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 exclusive HOSHIZAKI solid-state control is employed.
2) A Printed Circuit Board (hereafter called “Timer Board”) includes a stable and high-
quality control system.
3) No adjustment is required.
[b] TIMER BOARD
CAUTION
1. Fragile, handle very carefully.
2. A timer board contains CMOS (Complementary Metal-Oxide
Semiconductor) 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 eld.
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
(GEAR MOTOR)
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 supply AC 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 relay itself.
2.The above operation times are median. See Fig. 3 for details.
3. GM = Gear Motor
CM = Compressor

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Fig. 4
III. INSTALLATION INSTRUCTIONS
WARNING
The installation must be carried out by qualied personnel, in accordance
with current regulations, according to the manufacturer’s instructions.
1. UNPACKING
WARNING
Children should not be allowed in reach of the packaging elements (plastic
bags and expanded polystyrene) as they are potential sources of danger.
CAUTION
1. Do not lift or manoeuvre the carton by using the shipping bands.
2. Remove shipping carton, tape(s) and packing. If packing material is left
in the icemaker, it will not work properly.
1) After removing the packaging, make sure that the icemaker is in good condition. If in
doubt, please do not use the equipment.
2) Remove the shipping tape holding the Door and Front Panel.
Power Supply Cord
Air Filter
Top Panel
Door
Front Panel (Left)
Front Cover
Louver

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3) Open the Door, take out the package containing accessories, and check the contents:
a) Installation Kit
Inlet Hose 1
Outlet Hose 1
Adjustable Leg 4
b) Scoop 1
4) Remove the Front Panel (Left) and Top Panel. See Fig. 5.
5) Remove the protective plastic lm from the panels. If the icemaker is exposed to the
sun or to heat, remove the lm after the icemaker cools.
Front Panel (Left): Remove the screws. Lift up and
pull toward you.
Top Panel: Remove the screws and lift up.
Fig. 5
2. LOCATION
WARNING
1. This icemaker is not intended for outdoor use. Normal operating ambient
temperature should be within 5°C to 40°C. Normal operating water
temperature should be within 5°C to 35°C. Operation of the icemaker,
for extended periods, outside of these normal temperature ranges may
affect production capacity.
2. The icemaker should not be located next to ovens, grills or other high
heat producing equipment.
3. The location should provide a firm and level foundation for the
equipment.
Top Panel
Protective Plastic Film
Adjustable Leg
Front Panel (Left)

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4. Allow 15 cm clearance at rear, sides and top for proper air circulation
and ease of maintenance and/or service should they be required.
5. This appliance is not suitable for installation in an area where a water jet
could be used and where dripping is not allowed.
6. Do not place anything on top of the icemaker or in front of the Louver.
7. This icemaker will not work at subfreezing temperatures. To prevent
damage to the water supply line, drain the icemaker when air
temperature is below zero (see “II. 2. PREPARING THE ICEMAKER
FOR LONG STORAGE” in the instruction manual).
8. The noise from this icemaker is 55 dB or less.
9. Avoid prolonged exposure of the appliance to direct sunlight.
10. This appliance contains flammable refrigerant in its cooling unit;
maintenance and recharging must therefore only be carried out by
authorized technicians.
3. INSTALLATION
* Incorrect installation can cause harm to people, animals or things, for which the
manufacturer cannot be held responsible.
1) Position the icemaker in the selected permanent site.
2) Level the icemaker in both the left-to-right and front-to-rear directions by adjusting the
legs.
4. ELECTRICAL CONNECTIONS
WARNING
THIS APPLIANCE MUST BE EARTHED
This icemaker requires an earth that meets the national and local
electrical code requirements. To prevent possible severe electrical shock
to individuals or extensive damage to equipment, install a proper earth
wire to the icemaker. Remove the plug from the mains socket before any
maintenance, repairs or cleaning is undertaken.
* This appliance requires a separate 220 - 240VAC, 13A supply. The electrical supply
must be protected by a suitable circuit breaker.