Related Manuals for Hoshizaki FD-1001MLH(-C)
Summary of Contents for Hoshizaki FD-1001MLH(-C)
- Page 1 Hoshizaki America, Inc. “A Superior Degree of Reliability” www.hoshizaki.com Modular Flaker Models FD-1001MAH(-C) FD-1001MWH(-C) FD-1001MRH(-C) FD-1001MLH(-C) SERVICE MANUAL Number: 73159 Issued: 2-12-2010...
- Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance. HOSHIZAKI AMERICA, INC.
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Page 3: Table Of Contents
This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualified service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety. - Page 4 3. Alarm Safeties ... 30 a) Low Water Safety (1-beep alarm) ... 30 b) Control Switch in the "DRAIN" Position (2-beep alarm) ... 30 c) High Pressure Switch (3 & 4-beep alarms) ... 30 d) Freeze Timer (5-beep alarm) ... 30 e) Low Voltage (6-beep alarm) ...
- Page 5 IV. Service Diagnosis ... 58 A. Ice Production Check ... 58 B. Diagnostic Procedure ... 58 C. Control Board Check ... 61 D. Bin Control Check ... 66 1. Infrared Sensor Check ... 66 2. Mechanical Bin Control Check ... 67 E.
- Page 6 VI. Cleaning and Maintenance ... 96 A. Cleaning and Sanitizing Instructions ... 96 1. Cleaning Solution ... 96 2. Cleaning Procedure ... 96 3. Sanitizing Solution ... 98 4. Sanitizing Procedure - Initial ... 98 5. Sanitizing Procedure - Final ... 99 B.
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Page 7: Important Safety Information
Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit. WARNING Indicates a hazardous situation which could result in death or serious injury. CAUTION Indicates a situation which could result in damage to the unit. -
Page 8: Specifications
I. Specifications A. Icemaker 1. FD-1001MAH (air-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 9: Fd-1001Mah-C (Air-Cooled)
2. FD-1001MAH-C (air-cooled) AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR FAN MOTOR OTHER MAXIMUM FUSE SIZE MAX. HACR BREAKER (USA ONLY) MAX. CIRC. BREAKER (CANADA ONLY) MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE QUALITY APPROXIMATE STORAGE CAPACITY... -
Page 10: Fd-1001Mwh (Water-Cooled)
3. FD-1001MWH (water-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 11: Fd-1001Mwh-C (Water-Cooled)
4. FD-1001MWH-C (water-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 12: Fd-1001Mrh (Remote Air-Cooled)
5. FD-1001MRH (remote air-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 13: Fd-1001Mrh-C (Remote Air-Cooled)
Thermostatic Expansion Valve Condensing Pressure Regulator on URC-5F R-404A, 4 lb.1oz. (1850g) (Ice Maker: 2 lb. 3 oz., Cond. Unit: 1 lb. 14 oz. ) High 427 PSIG, Low 230 PSIG High Voltage Cut-off Relay Internal Protector Fuse (3A) Auto-reset High Pressure Control Switch... -
Page 14: Fd-1001Mlh (Low Side, Parallel Rack System)
7. FD-1001MLH (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 15: Fd-1001Mlh-C (Low Side, Parallel Rack System)
8. FD-1001MLH-C (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 16: Condenser Unit
B. Condenser Unit 1. URC-5F a) Specifications AC SUPPLY VOLTAGE FAN MOTOR EXTERIOR DIMENSIONS (WxDxH) DIMENSIONS INCLUDING LEGS (WxDxH) EXTERIOR FINISH WEIGHT CONNECTIONS - ELECTRIC - REFRIGERANT CONDENSER FAN MOTOR PROTECTION REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE OPERATING CONDITIONS ACCESSORIES -SUPPLIED Note: We reserve the right to make changes in specifications and design without prior notice. - Page 17 b) Dimensions 24" (610 mm) 23-1/32" (585 mm) 19-11/16" 6/16" × 3/4" (10×20 mm) (500 mm) 4×2 (SLOTTED HOLES) 18-1/8" (460 mm) 20-15/32" (520 mm) 21-15/16" (557 mm) 7/8" DIA. HOLE 6-5/16" (160 mm) 2-15/16" (75 mm) (23 mm DIA.)
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Page 18: General Information
II. General Information A. Construction 1. FD-1001MAH(-C) (air-cooled) Inlet Water Valve Spout Extruding Head Heater (FD-1001MAH-C) Evaporator Expansion Valve Gear Motor Ice Chute Infrared Sensor Mechanical Bin Control Control Box Compressor Fan Motor Air-Cooled Condenser... -
Page 19: Fd-1001Mwh(-C) (Water-Cooled)
2. FD-1001MWH(-C) (water-cooled) Inlet Water Valve Spout Extruding Head Heater (FD-1001MWH-C) Evaporator Expansion Valve Gear Motor Ice Chute Infrared Sensor Mechanical Bin Control Control Box Compressor Water Regulating Valve Water-Cooled Condenser... -
Page 20: Fd-1001Mrh(-C) (Remote Air-Cooled)
3. FD-1001MRH(-C) (remote air-cooled) Inlet Water Valve Spout Extruding Head Heater (FD-1001MRH-C) Evaporator Expansion Valve Gear Motor Ice Chute Infrared Sensor Mechanical Bin Control Control Box Compressor... -
Page 21: Fd-1001Mlh(-C) (Low Side, Parallel Rack System)
4. FD-1001MLH(-C) (low side, parallel rack system) Inlet Water Valve Spout Extruding Head Heater (FD-1001MLH-C) Evaporator Expansion Valve Gear Motor Ice Chute Infrared Sensor Mechanical Bin Control Control Box Liquid Line Valve Strainer Evaporator Pressure Regulator Suction Line Valve... -
Page 22: Ice Making Unit
5. Ice Making Unit Extruding Head Upper Bearing Extruding Head Heater (Cubelet Models Only) Auger Cylinder Mechanical Seal O-Ring Housing-Lower Bearing Spline Coupling Cutter Allen Head Cap Screw Insulation Allen Head Cap Screw Hexagon Head Bolt Gear Motor... -
Page 23: Sequence Of Operation
B. Sequence of Operation The steps in the sequence are as outlined below. This unit utilizes a control board to switch the components on and off as needed. When power is supplied, the power switch is in the "ON" position, and the control switch is in the "ICE" position, CB "POWER OK" LED comes on. -
Page 24: E) Shutdown Cycle
LED turns on (flashing or steady), IS shutdown delay timer (S1 dip switch 1, 2, & 3) begins. For a typical dispenser unit application, a 100-second shutdown delay is recommended. When used with a standard Hoshizaki storage bin, any shutdown delay setting is acceptable. See "II.C.4.b) Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, &... -
Page 25: Sequence Flow Chart
2. Sequence Flow Chart... -
Page 26: Control Board
C. Control Board • A Hoshizaki exclusive control board is employed in FD-1001MAH(-C), FD-1001MWH(-C), FD-1001MRH(-C), and FD-1001MLH(-C) Modular Flakers. • All models are pre-tested and factory set. 1. The control board is fragile; handle very carefully. 2. The control board contains integrated circuits, which are susceptible to failure due to static discharge. -
Page 27: Control Board Layout
1. Control Board Layout • "COMP" LED (X1 Relay) • "GM" LED Comp (X2 Relay) • K1 Connector (115VAC) #3 Input (black) #2 GM, FMR, FMS (brown) • "FLUSH" LED (X3 Relay) (drain) • "WTRIN" LED (X4 Relay) • K2 Connector (24VAC) Drain Valve #10 (white/blue) Transformer Input... -
Page 28: Features
When used with a standard Hoshizaki storage bin, any shutdown delay setting is acceptable. For further details, see "II.C.4.b) Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, and 3)."... -
Page 29: F) High Voltage And Low Voltage Cut-Outs
f) High Voltage and Low Voltage Cut-outs The maximum and minimum allowable supply voltages of this icemaker are limited by the high voltage (147Vac±5% or more) and low voltage (92Vac±5% or less) cut-outs. When high voltage (147Vac±5% or more) is present, the icemaker automatically stops and the control board signals with a 7-beep alarm every 3 seconds. -
Page 30: Alarm Safeties
Before resetting, contact your local Hoshizaki Service Representative. Turn the power off and then on again to reset the alarm. If the high pressure switch has reset, the icemaker starts running again. -
Page 31: F) High Voltage (7-Beep Alarm)
Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact Hoshizaki Technical Support at 1-800-233-1940. a) Default Dip Switch Settings The S1 dip switch settings are factory-set to the following positions: Dip Switch No. -
Page 32: B) Infrared Sensor Shutdown Delay (S1 Dip Switch 1, 2, & 3)
For a typical dispenser unit application, a 100-second shutdown delay is recommended. When used with a standard Hoshizaki storage bin, any shutdown delay setting is acceptable. Increasing the shutdown delay allows a higher level of ice in the dispensing unit/storage bin before shutdown. -
Page 33: E) Bin Control Selector (S1 Dip Switch 7)
e) Bin Control Selector (S1 dip switch 7) This unit is factory set for infrared sensor bin control operation. No adjustment is required. When used on a standard ice storage bin, the mechanical bin control may be used instead of the infrared sensor by moving S1 dip switch 7 to the off position. In the factory default position (S1 dip switch 7 in the on position), the gear motor delay after the upper float switch closes is 30 seconds. -
Page 34: Bin Control
The paddle-actuated mechanical bin control may be used as a stand-alone bin control when the unit is placed on a standard Hoshizaki ice storage bin (S1 dip switch 7 in the off position). WARNING! Do not place S1 dip switch 7 in the off position on dispenser unit applications. -
Page 35: Technical Information
III. Technical Information A. Water Circuit and Refrigeration Circuit 1. FD-1001MAH(-C) (air-cooled) Inlet Water Valve Float Switch Water Supply Line Reservoir Overflow Drain Outlet Condenser Water Level Evaporator Gear Motor Drain Pan Drier Pressure Switch Condenser Fan Motor Access Valve Water Circuit Refrigerant Circuit Spout... -
Page 36: Fd-1001Mwh(-C) (Water-Cooled)
2. FD-1001MWH(-C) (water-cooled) Inlet Water Valve Float Switch Water Supply Line Reservoir Overflow Drain Outlet Cond. Water Inlet Cond. Water Outlet Water Regulating Valve Water Level Evaporator Gear Motor Drain Pan Drier Pressure Switch Condenser Access Valve Water Circuit Refrigerant Circuit Spout Insulation Expansion... -
Page 37: Fd-1001Mrh(-C) (Remote Air-Cooled)
3. FD-1001MRH(-C) (remote air-cooled) Inlet Water Valve Float Switch Water Supply Line Reservoir Overflow Drain Outlet Condenser Unit Condenser Water Level Evaporator Gear Motor Drain Pan Coupling Insulation Pressure Switch Condensing Pressure Regulator Receiver Tank (Headmaster) Condenser Fan Motor Insulation Coupling Water Circuit Refrigerant Circuit... -
Page 38: Fd-1001Mlh(-C) (Low Side, Parallel Rack System)
4. FD-1001MLH(-C) (low side, parallel rack system) Inlet Water Valve Float Switch Water Supply Line Reservoir Overflow Drain Outlet Multi-Rack Condensing Unit Water Level Evaporator Gear Motor Drain Pan Liquid Line Valve Access Valve Suction Access Line Valve Valve Water Circuit Refrigerant Circuit Spout Insulation... -
Page 39: Wiring Diagrams
B. Wiring Diagrams 1. FD-1001MAH(-C), FD-1001MWH(-C), FD-1001MRH(-C) CONTROL BOARD SERVICE BUTTON DIP SWITCH COMPRESSOR RELAY WIRE COLOR CODE BLACK BROWN ORANGE YELLOW GREEN GRAY PINK VIOLET WHITE LIGHT BLUE DARK BLUE W/BU WHITE / BLUE WHITE / RED W/BK WHITE / BLACK W/BR WHITE / BROWN WHITE / ORANGE... -
Page 40: Fd-1001Mlh(-C)
2. FD-1001MLH(-C) CONTROL BOARD SERVICE BUTTON DIP SWITCH COMPRESSOR RELAY WIRE COLOR CODE BLACK BROWN ORANGE YELLOW GREEN GRAY PINK VIOLET WHITE LIGHT BLUE DARK BLUE W/BU WHITE / BLUE WHITE / RED W/BK WHITE / BLACK W/BR WHITE / BROWN WHITE / ORANGE... -
Page 41: Sequence Wiring Diagram
3. Sequence Wiring Diagram a) Fill Cycle. Power supply is turned on. Inlet water valve energizes and reservoir fills. CONTROL BOARD SERVICE BUTTON DIP SWITCH COMPRESSOR RELAY WIRE COLOR CODE BLACK BROWN ORANGE YELLOW GREEN GRAY PINK VIOLET WHITE LIGHT BLUE DARK BLUE W/BU WHITE / BLUE... -
Page 42: B) Ice Purge Cycle
b) Ice Purge Cycle Upper float switch closes, 30-second gear motor delay timer starts. After 30-second gear motor delay timer terminates, 5-minute ice purge timer starts, gear motor, fan motor/ fan motor-remote energize. Note: The 30-second gear motor delay is active when S1 dip switch 7 is in the on position. -
Page 43: C) Freeze Cycle
c) Freeze Cycle 5-minute ice purge timer terminates, compressor energizes (liquid line valve, and suction line valve on MLH models). CONTROL BOARD SERVICE BUTTON DIP SWITCH COMPRESSOR RELAY WIRE COLOR CODE BLACK BROWN ORANGE YELLOW GREEN GRAY PINK VIOLET WHITE LIGHT BLUE DARK BLUE W/BU... -
Page 44: D) 1-In-1 Drain Cycle
d) 1-in-1 Drain Cycle Compressor, (liquid line valve, suction line valve on MLH models), fan motor/fan motor-remote, and gear motor continue. Drain valve energizes for 2 seconds every hour. CONTROL BOARD SERVICE BUTTON DIP SWITCH COMPRESSOR RELAY WIRE COLOR CODE BLACK BROWN ORANGE... -
Page 45: E) 1-In-12 Drain Cycle
e) 1-in-12 Drain Cycle 1-in-12 drain cycle initiates (S1 dip switch 4). Compressor and fan motor/fan motor-remote de-energize. 5-minute ice purge timer starts and gear motor continues. 5-minute ice purge timer terminates, gear motor de-energizes. Drain valve opens for 10 minutes. CONTROL BOARD SERVICE BUTTON DIP SWITCH... -
Page 46: F) Infrared Sensor Shutdown
f) Infrared Sensor Shutdown Ice fills storage bin to level of activating infrared sensor, infrared sensor yellow LED turns on (flashing or steady). Infrared sensor shutdown sequence begins. For further information, see "II.B.1.e) Shutdown Cycle." CONTROL BOARD SERVICE BUTTON DIP SWITCH COMPRESSOR RELAY WIRE COLOR CODE BLACK... -
Page 47: G) Mechanical Bin Control Shutdown
Dip Switch 7 "ON": The icemaker shuts down within 10 seconds of the mechanical bin control opening and a 9-beep alarm sounds. Dip Switch 7 "OFF": Hoshizaki ice storage bin applications only. The icemaker shuts down within 10 seconds of the mechanical bin control opening. -
Page 48: H) Low Water Safety
h) Low Water Safety During fill or refill, should the upper float switch fail to close within 90 seconds after the water valve energizes, a 1-beep alarm sounds. The water valve remains open until the upper float switch closes. If this occurs during refill, the icemaker cycles down. CONTROL BOARD SERVICE BUTTON DIP SWITCH CONTROL... -
Page 49: I) High Pressure Switch
High Pressure Switch If pressure on the refrigeration circuit high-side exceeds Hoshizaki specifications, a high pressure switch activates. The control board then shuts down the unit until the high-side pressure returns to an acceptable level. See "II.C.3.c) High Pressure Switch (3 & 4-beep alarms)."... -
Page 50: Performance Data
C. Performance Data 1. FD-1001MAH (air-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 51: Fd-1001Mah-C (Air-Cooled)
2. FD-1001MAH-C (air-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day (kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm²G) SUCTION PRESSURE PSIG ( kg/cm²G ) TOTAL HEAT OF REJECTION Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 52: Fd-1001Mwh (Water-Cooled)
3. FD-1001MWH (water-cooled) Awaiting Data Note: We reserve the right in make changes to specifications and design without prior notice. -
Page 53: Fd-1001Mwh-C (Water-Cooled)
4. FD-1001MWH-C (water-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 54: Fd-1001Mrh (Remote Air-Cooled)
5. FD-1001MRH (remote air-cooled) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 55: Fd-1001Mrh-C (Remote Air-Cooled)
6. FD-1001MRH-C (remote air-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day (kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm²G) SUCTION PRESSURE PSIG ( kg/cm²G ) CONDENSER VOLUME HEAT OF REJECTION FROM CONDENSER 8900 BTU/h (AT 90°F /WT 70°F) HEAT OF REJECTION FROM COMPRESSOR 1400 BTU/h (AT 90°F /WT 70°F) Note: We reserve the right to make changes in specifications and design without prior... -
Page 56: Fd-1001Mlh (Low Side, Parallel Rack System)
7. FD-1001MLH (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 57: Fd-1001Mlh-C (Low Side, Parallel Rack System)
8. FD-1001MLH-C (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 58: Service Diagnosis
IV. Service Diagnosis 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Risk of electric shock. Use extreme caution and exercise safe electrical practices. - Page 59 5) Turn on the power supply, then move the power switch to the "ON" position. Make sure the control switch is in the "ICE" position. CB "POWER OK" LED and IS green LED turn on. Diagnosis "POWER OK" LED: Check that CB "POWER OK" LED is on. If not, check for proper supply voltage (115VAC) input to the control transformer.
- Page 60 7) Ice Purge Cycle – "GM" LED is on. 30-second GM delay timer and 30-minute freeze timer start. WV de-energizes and "WTRIN" LED turns off. Once the 30-second GM delay timer terminates, the 5-minute ice purge timer starts. GMR (X2 on CB), GM, GMPR, FM/FMR, and EHH (-C model only) energize.
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Page 61: Control Board Check
10) Shutdown – See "IV.D. Bin Control Check." Legend: CB–control board; Comp–compressor; DV–drain valve; EHH–extruding head heater (-C model only); FM–fan motor; FMR–fan motor-remote; GM–gear motor; GMPR–gear motor protect relay; GMR–gear motor relay; IS–infrared sensor; LF/S–lower float switch; LLV–liquid line valve (MLH model only);... - Page 62 4) Infrared Sensor (K6 connector): Check that the infrared sensor green LED is on. If not, check for 20VDC from the black K6 connector dark blue wire (DBU) to the K6 connector brown (BR) wire. See Fig. 4. If 20VDC is not present, the control board is bad and must be replaced.
- Page 63 a. Control Switch (K9 connector pins #1 and #2 white/black (W/BK) wires): 5VDC is present from the white K5 connector pin closest to red K4 connector to the K9 connector pin #1 white/black (W/BK) wire at all times. If 5VDC is not present, the control board is bad and must be replaced.
- Page 64 e. Float Switch (K8 connector pins #5 black (BK) wire, #6 red (R) wire (upper), and #7 dark blue (DBU) wire (lower)): 5VDC is present from the white K5 connector pin closest to red K4 connector to the K8 connector pin #5 (black (BK) wire). If 5VDC is not present, the control board is bad and must be replaced.
- Page 65 Control Switch #1 to #2 (white/black) "ICE"-Open-5VDC "DRAIN"-Closed-0VDC • K1 Connector (115VAC) #3 Input (black) #2 GM, FMR, FMS (brown) • K2 Connector (24VAC) Drain Valve #10 (white/blue) Transformer Input #9 (white/red) Inlet Water Valve #8 (white/brown) Transformer Input #7 (white/red) 5VDC common terminals High Pressure Switch #3 to #4 (yellow)
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Page 66: Bin Control Check
D. Bin Control Check 1. Infrared Sensor Check Make sure S1 dip switch 7 is in the "ON" position. This allows the control board to monitor the infrared sensor along with the mechanical bin control. 1) Turn off the power supply. 2) Remove the front panel, top panel, and control box cover. -
Page 67: Mechanical Bin Control Check
The stand-alone application should only be used in Hoshizaki standard ice storage bin applications. When ice fills the chute and engages the actuator paddle, the mechanical bin control opens and the control board shuts down the icemaker within 10 seconds. - Page 68 5) Make sure the "GM" LED is on. There is a delay of at least 30 seconds before the "GM" LED turns on after power-up. After the "GM" LED turns on, press the "SERVICE" button on the control board to bypass the 5-minute compressor delay. WARNING! Risk of electric shock.
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Page 69: Float Switch Check And Cleaning
2) Remove the float switch assembly from the reservoir cover. See Fig. 10. 3) Wipe down the float switch assembly with a mixture of 1 part Hoshizaki "Scale Away" 25 parts warm water. Rinse the assembly thoroughly with clean water. - Page 70 Red (R) (upper float switch) Black (BK) (common) Dark Blue (DBU) (lower float switch) Magnet (towards top) Upper Float (blue) Magnet (towards top) Lower Float (white) Float Switch Assembly Reservoir Cover Reservoir Spring Retainer Clip Plastic Retainer Clip Fig. 9 Fig.
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Page 71: Diagnostic Charts
F. Diagnostic Charts 1. No Ice Production Problem Possible Cause [1] The icemaker will not a) Power Supply start. b) Water Supply c) Power Switch (Control Box) d) Circuit Protect Relay e) Transformer f) Fuse (Control Box) g) Infrared Sensor h) Mechanical Bin Control (Backup Bin Control Safety) - Page 72 Problem Possible Cause [1] The icemaker will not i) High Pressure Switch start (continued). (continued) j) Control Switch k) Inlet Water Valve l) Control Board [2] Fill cycle will not a) Float Switch terminate. b) Drain Water Valve c) Hoses d) Control Board [3] Ice purge cycle will a) Control Board...
- Page 73 Problem Possible Cause [4] Freeze cycle will not d) Compressor start (compressor) (continued). e) Power Supply [5] Freeze cycle a) Refrigerant Line starts, but no ice is produced. b) Expansion Valve (TXV) (not adjustable) c) Compressor d) Headmaster (C.P.R.) (remote air-cooled model) e) Water Supply Line (water-cooled model)
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Page 74: Low Ice Production
2. Low Ice Production Problem Possible Cause [1] Low ice production. a)Evaporator b)Bin Control c) Losing Water d)Expansion Valve (TXV) (not adjustable) e)Refrigerant Line f) High-Side Pressure Too High g)Compressor Remedy 1. Dirty. 1. Clean. See "VI.A. Cleaning and Sanitizing Instructions."... -
Page 75: Other
3. Other Problem Possible Cause [1] Icemaker will not stop a)Bin Control when bin is filled with ice. [2] Abnormal noise a)Fan Motor (except water-cooled model) b)Compressor c) Refrigerant Lines d)Auger e)Gear Motor f) Evaporator [3] Overflow from a)Water Supply reservoir (water does not stop). -
Page 76: Removal And Replacement Of Components
V. Removal and Replacement of Components 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Move the power switch to the "OFF" position and turn off the power supply before servicing. -
Page 77: Brazing
2. Brazing 1. R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). 2. R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames), R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous. 3. -
Page 78: Refrigerant Recovery, Evacuation, And Recharge - Mlh Model (Low Side, Parallel Rack System)
For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled models, see the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used. -
Page 79: Removal And Replacement Of Compressor
5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder. Remember to loosen the connection and purge the air from the hose. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used. -
Page 80: Removal And Replacement Of Expansion Valve
6) Remove the hold-down bolts, washers, and rubber grommets. 7) Remove the compressor. Unpack the new compressor package. 8) Attach the rubber grommets of the prior compressor to the new compressor. 9) Place the compressor in position and secure it using the bolts and washers. 10) Place the new drier in position. -
Page 81: Removal And Replacement Of Evaporator Assembly Components
8) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with pressurized air for leak testing. -
Page 82: Upper Bearing Wear Check
1. Upper Bearing Wear Check To ensure that the bearing inside the extruding head does not exceed the wear tolerance of .02", follow the instructions below. 1) Turn off the power supply. 2) Remove the panels. 3) Remove the strap connecting the spout to the chute assembly, then remove the spout. 4) Remove the bolt from the auger and lift off the cutter. -
Page 83: Removal And Replacement Of Extruding Head
3. Removal and Replacement of Extruding Head 1) Drain the water from the evaporator. a) Move the power switch to the "OFF" position. b) Move the control switch to the "DRAIN" position. c) Move the power switch to the "ON" position and allow the water to drain from the evaporator. -
Page 84: Removal And Replacement Of Evaporator
5. Removal and Replacement of Evaporator 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. Install the new drier with the arrow on the drier in the direction of the refrigerant flow. -
Page 85: Removal And Replacement Of Mechanical Seal And Lower Housing
16) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled models, see the rating label inside the icemaker. 17) Replace the removed parts in the reverse order of which they were removed. 18) Replace the panels in their correct positions. -
Page 86: Removal And Replacement Of Gear Motor
6b. Lower Housing 10) Remove the bolts securing the housing to the gear motor and remove the housing from the gear motor. If inspection of the upper bearing inside the extruding head (see "V.D.1. Upper Bearing Wear Check") indicates that it is out of tolerance, replace both it and the bearing inside the lower housing. -
Page 87: Removal And Replacement Of Air-Cooled Condenser
E. Removal and Replacement of Air-Cooled Condenser 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. Install the new drier with the arrow on the drier in the direction of the refrigerant flow. -
Page 88: Removal And Replacement Of Water-Cooled Condenser
F. Removal and Replacement of Water-Cooled Condenser 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. Install the new drier with the arrow on the drier in the direction of the refrigerant flow. -
Page 89: Removal And Replacement Of Water Regulating Valve - Water-Cooled Model
G. Removal and Replacement of Water Regulating Valve - Water-Cooled Model 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. -
Page 90: Adjustment Of Water Regulating Valve - Water-Cooled Model
18) Open the condenser water supply line shut-off valve. If connected to a closed loop water supply, also open the condenser return outlet shut-off valve. 19) Check for water leaks. 20) Replace the panels in their correct positions. 21) Turn on the power supply. H. -
Page 91: Removal And Replacement Of Headmaster (Condensing Pressure Regulator - C
J. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.) - Remote Air-Cooled Model 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. -
Page 92: Removal And Replacement Of Liquid Line Valve Or Suction Line Valve - Mlh Model (Low Side, Parallel Rack System)
K. Removal and Replacement of Liquid Line Valve or Suction Line Valve - MLH Model (low side, parallel rack system) 1. Always replace the strainer when replacing the liquid line valve. 2. Always install a new drier every time the sealed refrigeration system is opened. -
Page 93: (Low Side, Parallel Rack System)
L. Removal and Replacement of Evaporator Pressure Regulator (E.P.R.) MLH Model (low side, parallel rack system) 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. -
Page 94: Drain Valve
6) Loosen the fitting nut on the inlet water valve, and remove the inlet water valve. Do not lose the packing inside the fitting nut. 7) Remove the water supply hose from the inlet water valve. 8) Install the new inlet water valve. 9) Replace the removed parts in the reverse order of which they were removed. -
Page 95: Removal And Replacement Of Control Board
N. Removal and Replacement of Control Board 1) Turn off the power supply. 2) Remove the front panel and the control box cover. 3) Disconnect the control board connectors from the control board. 4) Remove the control board. 5) Adjust the dip switches on the new control board to the factory default settings. See "II. C.4.a) Default Dip Switch Settings."... -
Page 96: Cleaning And Maintenance
For safety and maximum effectiveness, use the solution immediately after dilution. Dilute 9.6 fl. oz. (0.29 l) of Hoshizaki "Scale Away" with 1.6 gal. (6.0 l) of warm water. 2. Cleaning Procedure 1) Turn off the power supply, then remove the front panel. Make sure the power switch is in the "ON"... - Page 97 6) Remove the strap connecting the spout to the chute assembly, then remove the spout. Packing Spout Rubber O-Ring Nylon O-Ring (if applicable) Extruding Head Evaporator Assembly 7) Pour the cleaning solution over the extruding head until the evaporator assembly and the reservoir are full and the solution starts to overflow into the drain pan.
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Page 98: Sanitizing Solution
11) Wipe down the infrared sensor's lens (located on the bottom of the icemaker) with the cleaning solution. See Fig. 16. Next, rinse the cleaning solution off of the infrared sensor's lens with a clean, damp cloth. 12) Move the control switch to the "ICE" position, then move the power switch to the "ON" position. -
Page 99: Sanitizing Procedure - Final
4) Remove the proximity switch from the chute assembly, then remove the chute assembly from the icemaker. 5) Remove the packing at the bottom of the ice chute. Remove the 3 ties and the chute insulation. 6) Remove the 2 baffles. 7) Remove the plate and the packing from the top of the ice chute, then remove the backup bin control assembly by sliding it slightly towards the chute opening and lifting it off. -
Page 100: Maintenance
Consult with your local distributor about inspection and maintenance service. To obtain the name and phone number of your local distributor, visit www.hoshizaki.com or call Hoshizaki Technical Support at 1-800-233-1940 in the USA. 1. Only qualified service technicians should attempt to service or maintain this icemaker. - Page 101 Frequency Area Every 2 Air Filter(s) Weeks Monthly External Water Filters Icemaker and Dispenser Unit/ Storage Bin Exterior Infrared Sensor Lens; Underside of Icemaker and Top Kits; Bin Door and Snout (if applicable) Every 6 Icemaker and Months Dispenser Unit/ Storage Bin Evaporator Condensate Drain...
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Page 102: Preparing The Icemaker For Long Storage
C. Preparing the Icemaker for Long Storage When storing the icemaker for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage. When the icemaker is not used for two or three days under normal conditions, it is sufficient to only move the power switch to the "OFF"... - Page 103 3. On water-cooled model only, first remove the water from the water-cooled condenser: 1) Make sure the power supply is off, then remove the front and right side panels. 2) Close the condenser water supply line shut-off valve. If connected to a closed loop system, also close the condenser return line shut-off valve.