Hoshizaki FM-170AFE Service Manual
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Hoshizaki FM-170AFE Service Manual

Hoshizaki FM-170AFE Service Manual

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

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Summary of Contents for Hoshizaki FM-170AFE

  • Page 1 E2GA-734 ISSUED: MAY 18, 2007 REVISED: HOSHIZAKI MODULAR ICE MAKER FM-170AFE MODEL FM-170AFE-N SERVICE MANUAL...

  • Page 2: Table Of Contents

    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. GENERAL INFORMATION -------------------------------------------------------------------------- 5 1. CONSTRUCTION ---------------------------------------------------------------------------------- 5 2.
  • Page 3 [b] REFRIGERANT RECOVERY -------------------------------------------------------------- 30 [c] EVACUATION AND RECHARGE --------------------------------------------------------- 30 2. BRAZING ------------------------------------------------------------------------------------------- 31 3. COMPRESSOR ----------------------------------------------------------------------------------- 31 4. DRIER ----------------------------------------------------------------------------------------------- 33 5. EXPANSION VALVE ----------------------------------------------------------------------------- 34 6. EVAPORATOR ASSEMBLY ------------------------------------------------------------------- 35 7. FAN MOTOR --------------------------------------------------------------------------------------- 39 8. FLOAT SWITCH ----------------------------------------------------------------------------------- 39 9.

  • Page 4: Specifications

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

  • Page 5: [B] With Storage Bin (B-300Pg)

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

  • Page 6: Specifications

    2. SPECIFICATIONS [a] FM-170AFE AC SUPPLY VOLTAGE 1 phase 220-240V 50Hz 220-230V 60Hz AMPERAGE 4.1A (Ambient temp. 32°C, Water temp. 21°C) STARTING AMPERAGE 19.0A ELECTRIC CONSUMPTION 620W (Ambient temp. 32°C, Water temp. 21°C) POWER FACTOR POWER SUPPLY CAPACITY 1.24kVA ICE PRODUCTION PER 24h Approx.

  • Page 7: [B] Fm-170Afe-N

    [b] FM-170AFE-N AC SUPPLY VOLTAGE 1 phase 220-240V 50Hz 220-230V 60Hz AMPERAGE 4.1A (Ambient temp. 32°C, Water temp. 21°C) STARTING AMPERAGE 19.0A ELECTRIC CONSUMPTION 640W (Ambient temp. 32°C, Water temp. 21°C) POWER FACTOR POWER SUPPLY CAPACITY 1.24kVA ICE PRODUCTION PER 24h Approx.

  • Page 8: General Information

    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.
  • Page 9 ICE MAKING UNIT...

  • Page 10: Operation - How It Works

    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. From the Tank, water flows by gravity into the bottom of the Evaporator to completely surround the Auger and fill the Evaporator with water to the same level as in the Reservoir Tank.

  • Page 11: Timer Board

    3. TIMER BOARD [a] SOLID-STATE CONTROL 1) An exclusive HOSHIZAKI solid-state control is employed in FM-170AFE and FM-170AFE- N modular icemakers. 2) A Printed Circuit Board (hereafter called “Timer Board”) includes a stable and high-quality control system. 3) No adjustment is required.

  • Page 12: [C] Sequence

    Fig. 1 [c] SEQUENCE Fig. 2...
  • Page 13 CONTROL (CTL) PROTECT (PRT) X1 RELAY (GEAR MOTOR) X2 RELAY (COMPRESSOR) PART CODE 437305-02 MODEL H2AA144C02 RATING 24 VAC 50/60Hz 60 •}15 sec. 90 •}22 sec. 150 •}45 sec. Max. 1 sec. Max. 0.25 sec. Max. 1 sec. Fig. 3 Note: “T”...
  • Page 14 Functions of Terminals 1) Terminals 1, 2 Power supply AC 24V. 2) Terminals 3, 4 Control X (GM) and X (CM) Relays. When closed, energize X (GM) in 1 sec. and X (CM) in 60 sec. When opened, de-energize X (GM) in 150 sec.

  • Page 15: Maintenance And Cleaning Instructions

    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. To have the optimum performance of this icemaker, the following consumable parts need periodical inspection, maintenance and replacement: Extruding Head (Top Bearing) Housing (Lower Bearing) Mechanical Seal...

  • Page 16: Gear Motor

    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.

  • Page 17: Water Valve

    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.

  • Page 18: Cleaning Of Water System

    Cleaning solution: “Nickel-Safe Ice Machine Cleaner” by The Rectorseal Corporation or similar. Prepare approximately 3 L of solution as directed on the container. 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.
  • Page 19 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 the Reservoir with the solution to the overflow point. If necessary, use a small brush to clean the inside of the Reservoir.

  • Page 20: Periodical Cleaning

    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.

  • Page 21: Technical Information

    IV. TECHNICAL INFORMATION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT...

  • Page 22: Control Box

    2. CONTROL BOX...

  • Page 23: Wiring Diagram

    3. WIRING DIAGRAM...

  • Page 24: Timing Chart

    4. TIMING CHART [a] PRINCIPLE OF OPERATION When the Operation Switch is moved to the “ON” position, water is supplied through the Control Water Valve. This cycle continues until the Reservoir is full and the Float Switch signals to close the Water Valve. The Gear Motor will then start in 1 second and the Compressor in 60 seconds.
  • Page 25 PRESSURE SWITCH MOTOR PROTECTOR POWER ON RESET UPPER Float Switch LOWER Control Water Valve Pressure Switch Gear Motor Fan Motor Compressor 1sec 0.25sec 1sec 60sec 60sec Fig. 7 3) Low Water Control The icemaker will stop when the water level in the Reservoir falls below the lower float level and is not refilled to the upper float level within 90 seconds due to either an interruption in the water supply or low water pressure.

  • Page 26: Performance Data

    5. PERFORMANCE DATA [a] FM-170AFE 10/10 21/15 32/21 Ambient Temp/Water Temp (°C) 15.5 14.5 13.5 10/10 21/15 32/21 Ambient Temp/Water Temp (°C) 0.12 0.08 0.06 0.04 Head Pressure (MPa) 0.02 Suction Pressure (MPa) 10/10 21/15 32/21 Ambient Temp/Water Temp (°C)

  • Page 27: [B] Fm-170Afe-N

    [b] FM-170AFE-N 10/10 21/15 32/21 Ambient Temp/Water Temp (°C) 15.5 14.5 13.5 10/10 21/15 32/21 Ambient Temp/Water Temp (°C) 0.12 0.08 0.06 0.04 Head Pressure (MPa) 0.02 Suction Pressure (MPa) 10/10 21/15 32/21 Ambient Temp/Water Temp (°C)

  • Page 28: Service Diagnosis

    V. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION PROBLEM CHECK POSSIBLE CAUSE REMEDY [1] The icemaker a) Power Supply 1. OFF position. 1. Move to ON position. will not start. 2. Loose connections. 2. Tighten. 3. Bad contacts. 3. Check for continuity and replace.
  • Page 29 PROBLEM CHECK POSSIBLE CAUSE REMEDY [3] (Continued) e) Gear Motor 1. Coil winding opened. 1. Replace. Protect Relay 2. Bad contacts. 2. Check for continuity and replace. f) Pressure Switch 1. Dirty Air Filter or 1. Clean. Condenser. 2. Ambient temperature 2.

  • Page 30: Low Ice Production

    2. LOW ICE PRODUCTION PROBLEM CHECK POSSIBLE CAUSE REMEDY [1] Low ice a) Refrigerant Line 1. Gas leaks. 1. See 1 - [5] - a). production. 2. Refrigerant line 2. Replace the clogged clogged. component. 3. Overcharged. 3. Recharge. b) High-side 1.
  • Page 31 PROBLEM CHECK POSSIBLE CAUSE REMEDY [2] Overflow from a) Water Supply 1. Water pressure too 1. Install a Pressure Reservoir high. Reducing Valve. (Water does b) Water Valve 1. Diaphragm does not 1. Clean or replace. not stop.) close. c) Float Switch 1.

  • Page 32: Removal And Replacement Of Components

    VI. REMOVAL AND REPLACEMENT OF COMPONENTS 1. SERVICE FOR REFRIGERANT LINES [a] SERVICE INFORMATION 1) Allowable Compressor Opening Time and Prevention of Lubricant Mixture [R134a] The compressor must not be opened more than 30 minutes in replacement or service. Do not mix lubricants of different compressors even if both are charged with R134a, except when they uses the same lubricant.

  • Page 33: [B] Refrigerant Recovery

    7) Evacuation, Vacuum Pump and Refrigerant Charge [R134a] Never allow the oil in the vacuum pump to flow backward. The vacuum level and vacuum pump may be the same as those for the current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for R134a.

  • Page 34: Brazing

    9) Close the Refrigerant Access Valve, and disconnect the hoses and Service Manifold. 10) Cap the Access Valve and leak test. 2. BRAZING DANGER 1. Refrigerant R134a itself is not flammable, explosive and poisonous. However, when exposed to an open flame, R134a creates Phosgene gas, hazardous in large amounts.
  • Page 35 16) Evacuate the system, and charge it with refrigerant. See the Nameplate for the required refrigerant charge. (See “1. [c] EVACUATION AND RECHARGE”.) 17) Refit the panels in their correct position. 18) Plug in the icemaker. Note: Hoshizaki recommends that Compressor starting electrics are always replaced at the same time as the Compressor.

  • Page 36: Drier

    4. DRIER IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened. Do not replace the Drier until after all other repair or replacement has been made. 1) Unplug the icemaker. 2) Remove the Top Panel, the Front Panel (Left) and the Left Side Panel. 3) Recover the refrigerant and store it in a proper container, if required by an applicable law.

  • Page 37: Expansion Valve

    5. EXPANSION VALVE IMPORTANT Sometimes moisture in the refrigerant circuit exceeds the Drier capacity and freezes up at the Expansion Valve. Always install a new Drier every time the sealed refrigeration system is opened. Do not replace the Drier until after all other repair or replacement has been made.

  • Page 38: Evaporator Assembly

    6. EVAPORATOR ASSEMBLY - See Fig. 9 1) Unplug the icemaker. 2) Close the water supply tap. 3) Remove the Inlet Hose from the water tap, and drain the Hose. 4) Remove the Top Panel, the Front Panel (Left) and the Left Side Panel. 5) Unhook the Drain Hose, and remove the Cap on the hose end to drain the water system.
  • Page 39 IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened. Do not replace the Drier until after all other repair or replacement has been made. 13) Remove the Bulb of the Expansion Valve. 14) Disconnect the brazing connections of the Expansion Valve and the Copper Tube - Low Side from the Evaporator, using brazing equipment.
  • Page 40 GEAR MOTOR 22) Remove the Coupling - Spline on the Gear Motor Shaft. 23) Cut the Connectors of the Gear Motor. 24) Remove the three Socket Head Cap Screws securing the Gear Motor. 25) When replacing the Evaporator; (a) Braze the new Evaporator with nitrogen gas flowing at the pressure of 0.2 - 0.3 bar. (b) Replace the Drier.
  • Page 41 Cutter Cutter (FM-170AFE-N) (FM-170AFE) Socket Head Cap Screw Seal Flange Extruding Head (FM-170AFE-N) Extruding Head Ring (FM-170AFE) Mechanical Seal Evaporator O-ring Housing Split Lock Washer Socket Head Coupling - Spline Cap Screw Auger Gear Motor Fig. 9...

  • Page 42: Fan Motor

    7. FAN MOTOR 1) Unplug the icemaker. 2) Remove the Top Panel, the Front Panel (Left) and the Left Side Panel. 3) Remove the wire connectors from the Fan Motor leads. 4) Remove the Fan Motor Bracket and the Fan Motor. 5) Install the new Fan Motor onto the Bracket, and re-fix the Fan Blade.

  • Page 43: Control Water Valve

    9. CONTROL WATER VALVE 1) Unplug the icemaker. 2) Close the water supply tap. 3) Remove the Inlet Hose from the water tap, and drain the Hose. 4) Remove the Top Panel and the Front Panel (Left). 5) Disconnect the Terminals from the Control Water Valve. 6) Loosen the Fitting Nut on the Control Water Valve Inlet, and remove the Control Water Valve.

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Fm-170afe-n

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