Hoshizaki KM-1301SAH/3 Service Manual
Stackable crescent cuber
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Summary of Contents for Hoshizaki KM-1301SAH/3
- Page 1 Hoshizaki America, Inc. “A Superior Degree of Reliability” www.hoshizaki.com Stackable Crescent Cuber Models KM-1301SAH/3 KM-1301SWH/3 KM-1301SRH/3 SERVICE MANUAL ™ Number: 73169 Issued:1-21-2009 Revised: 8-6-2009...
- 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 e) Harvest Pump Timer (S4 dip switch 7) ... 27 f) Factory Use (S4 dip switch 8) ... 27 g) Freeze Timer (S4 dip switch 9 & 10) ... 27 h) Float Switch Control (S5 dip switch 1) ... 28 i) Refill Counter (S5 dip switch 2 through 5) ...
- Page 5 V. Removal and Replacement of Components ... 65 A. Service for Refrigerant Lines ... 65 1. Refrigerant Recovery ... 65 2. Brazing ... 66 3. Evacuation and Recharge (R-404A) ... 66 B. Removal and Replacement of Compressor ... 67 C. Removal and Replacement of Expansion Valve ... 68 D.
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Page 6: 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 7: Specifications
I. Specifications A. Icemaker 1. KM-1301SAH (air-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC &... -
Page 8: Km-1301Sah3 (Air-Cooled)
2. KM-1301SAH3 (air-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC & WATER CONSUMPTION ELECTRIC W (kWH/100 lbs.) WATER gal./24HR (gal./100 lbs.) -
Page 9: Km-1301Swh (Water-Cooled)
3. KM-1301SWH (water-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC & WATER CONSUMPTION ELECTRIC W (kWH/100 lbs.) WATER gal./24HR (gal./100 lbs.) -
Page 10: Km-1301Swh3 (Water-Cooled)
4. KM-1301SWH3 (water-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC & WATER CONSUMPTION ELECTRIC W (kWH/100 lbs.) WATER gal./24HR (gal./100 lbs.) -
Page 11: Km-1301Srh (Remote Air-Cooled)
5. KM-1301SRH (remote air-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC & WATER CONSUMPTION ELECTRIC W (kWH/100 lbs.) WATER gal./24HR (gal./100 lbs.) -
Page 12: Km-1301Srh3 (Remote Air-Cooled)
6. KM-1301SRH3 (remote air-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC & WATER CONSUMPTION ELECTRIC W (kWH/100 lbs.) WATER gal./24HR (gal./100 lbs.) -
Page 13: Condenser Unit
B. Condenser Unit 1. URC-14F Unit: inches (mm) -
Page 14: Specifications
SPECIFICATIONS MODEL: URC-14F 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 115/60/1 (Connection to Icemaker) 115 V Total 2.6FLA 35-11/16"... -
Page 15: General Information
II. General Information A. Construction 1. KM-1301SAH, KM-1301SAH3 (air-cooled) Inlet Water Valve Evaporator Assembly Cleaning Valve Check Valve (water) Water Pump Float Switch Compressor Bin Control Thermostat Spray Tubes Low-Side Service Valve High-Side Service Valve Transformer Box Control Switch (KM-1301SAH3) Expansion Valves Water Supply Inlet Junction Box... -
Page 16: Km-1301Swh, Km-1301Swh3 (Water-Cooled)
2. KM-1301SWH, KM-1301SWH3 (water-cooled) Inlet Water Valve Evaporator Assembly Cleaning Valve Check Valve (water) Water Pump Float Switch Compressor Bin Control Thermostat Spray Tubes Low-Side Service Valve High-Side Service Valve Control Switch Transformer Box (KM-1301SWH3) Expansion Valves Water Supply Inlet Junction Box Hot Gas Valve Check Valves... -
Page 17: Km-1301Srh, Km-1301Srh3 (Remote Air-Cooled)
3. KM-1301SRH, KM-1301SRH3 (remote air-cooled) Inlet Water Valve Evaporator Assembly Cleaning Valve Check Valve (water) Water Pump Float Switch Compressor Bin Control Thermostat Low-Side Service Valve Spray Tubes Control Switch Transformer Box (KM-1301SRH3) High-Side Service Valve High-Side Liquid Service Valve Water Supply Inlet Hot Gas Valve Junction Boxes... -
Page 18: Sequence Of Operation
B. Sequence of Operation This unit utilizes a thermostatic bin control. For operation, the K4 jumper (4A4883G01) must be in place on the control board RED K4 connector. 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. When power is supplied, CB red "POWER OK"... -
Page 19: D) Pump-Out Cycle
de-energize. For the first 5 minutes, CB will not accept a signal from F/S. This minimum 5-minute freeze time is short cycle protection for Comp. At the end of 5 minutes, F/S assumes control. As ice builds on the evaporator, the water level in the tank lowers. The freeze cycle continues until F/S opens and terminates the cycle. -
Page 20: Sequence Flow Chart
2. Sequence Flow Chart... -
Page 21: Control Board
C. Control Board • A Hoshizaki exclusive solid-state control board is employed in KM-1301SAH/3, KM-1301SWH/3, and KM-1301SRH/3, Stackable Crescent Cubers. • All models are pretested 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 22: Control Board Layout
1. Control Board Layout Bin Control Switch "ALARM RESET" Button Closed LED (green) (on continuously in thermostatic bin control application) Bin Control Switch Open LED (yellow) (mechanical bin control application only) Part Number Alarm Buzzer Power LED (red) (lights when power is supplied to the control board) Relay LEDs (4) -
Page 23: Features
2. Features a) Maximum Water Supply Period - 6 minutes The inlet water valve will be open during harvest for 6 minutes or the length of harvest minus 0 or 50 seconds (harvest pump timer (S4 dip switch 7)), whichever is shorter. For details, see "II.C.3.e) Harvest Pump Timer (S4 dip switch 7)."... -
Page 24: F) Led Lights And Audible Alarm Safeties
f) LED Lights and Audible Alarm Safeties At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when the control switch is moved to the "ICE" position. The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs. -
Page 25: Controls And Adjustments
However, a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting decreases 24-hour production. -
Page 26: C) Pump-Out Timer (S4 Dip Switch 3 & 4)
c) Pump-Out Timer (S4 dip switch 3 & 4) Do not adjust S4 dip switch 3 off and S4 dip switch 4 on for this model. Otherwise, pump motor does not rotate in the pump-out direction. When a pump-out is called for, the pump motor stops after the preceding freeze cycle. The pump motor restarts 2 seconds later in the reverse direction, taking water from the bottom of the tank and forcing pressure against the check valve seat allowing water to go through the check valve and down the drain. -
Page 27: E) Harvest Pump Timer (S4 Dip Switch 7)
In this case, see "IV.F.3. Low Ice Production" for possible solutions. The freeze timer is factory set, and generally no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. -
Page 28: H) Float Switch Control (S5 Dip Switch 1)
Factory set. S5 dip switch 1 allows for single or double float switch applications. The KM-1301SAH/3, KM1301SWH/3, and KM-1301SRH/3 use a single float switch. i) Refill Counter (S5 dip switch 2 through 5) Do not adjust. These must be left in the factory default position or the unit will not operate correctly. -
Page 29: Bin Control
D. Bin Control When the ambient temperature is below 45°F (7°C), the thermostatic bin control switch opens and shuts down the icemaker even if the ice storage bin is empty. When the thermostat is set in the prohibited range, the icemaker operates continuously even if the ice storage bin is filled with ice. -
Page 30: Technical Information
III. Technical Information A. Water Circuit and Refrigeration Circuit 1. KM-1301SAH, KM-1301SAH3 (air-cooled) -
Page 31: Km-1301Swh, Km-1301Swh3 (Water-Cooled)
2. KM-1301SWH, KM-1301SWH3 (water-cooled) -
Page 32: Km-1301Srh, Km-1301Srh3 (Remote Air-Cooled)
3. KM-1301SRH, KM-1301SRH3 (remote air-cooled) -
Page 33: Wiring Diagrams
B. Wiring Diagrams 1. Auxiliary Code T-0, U-0 a) KM-1301SAH (air-cooled) -
Page 34: B) Km-1301Swh (Water-Cooled)
b) KM-1301SWH (water-cooled) -
Page 35: C) Km-1301Srh (Remote Air-Cooled)
c) KM-1301SRH (remote air-cooled) -
Page 36: D) Km-1301Sah3 (Air-Cooled) And Km-1301Swh3 (Water-Cooled)
d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled) -
Page 37: E) Km-1301Srh3 (Remote Air-Cooled)
e) KM-1301SRH3 (remote air-cooled) -
Page 38: Auxiliary Code U-1 And Later
2. Auxiliary Code U-1 and Later a) KM-1301SAH (air-cooled) -
Page 39: B) Km-1301Swh (Water-Cooled)
b) KM-1301SWH (water-cooled) -
Page 40: C) Km-1301Srh (Remote Air-Cooled)
c) KM-1301SRH (remote air-cooled) -
Page 41: D) Km-1301Sah3 (Air-Cooled) And Km-1301Swh3 (Water-Cooled)
d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled) -
Page 42: E) Km-1301Srh3 (Remote Air-Cooled)
e) KM-1301SRH3 (remote air-cooled) -
Page 43: Performance Data
C. Performance Data 1. KM-1301SAH (air-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER... -
Page 44: Km-1301Sah3 (Air-Cooled)
2. KM-1301SAH3 (air-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER Note:... -
Page 45: Km-1301Swh (Water-Cooled)
3. KM-1301SWH (water-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER TOTAL HEAT OF REJECTION FROM COMPRESSOR... -
Page 46: Km-1301Swh3 (Water-Cooled)
4. KM-1301SWH3 (water-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER TOTAL HEAT OF REJECTION FROM COMPRESSOR... -
Page 47: Km-1301Srh (Remote Air-Cooled)
5. KM-1301SRH (remote air-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER... -
Page 48: Km-1301Srh3 (Remote Air-Cooled)
6. KM-1301SRH3 (remote air-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER... -
Page 49: 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 50 3) 1-Minute Fill Cycle – LED 4 is on. WV and X2 relay (auxiliary code T-0, U-0), X11 relay (auxiliary code U-1 and later) energize and the 1-minute fill cycle begins. After 1 minute, CB checks for a closed F/S. If F/S is closed, the harvest cycle begins. If closed, continue to step 4.
- Page 51 5) Freeze Cycle – LED 1 is on. Comp and FMR remain energized, PM energizes or remains energized depending on harvest pump timer (S4 dip switch 7) setting. FM and LLV energize. HGV, and X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later) de-energize.
- Page 52 Diagnosis: If PM does not reverse, check to see if CB S4 and S5 dip switch settings are in the factory default position. If S4 dip switch 3 and 4 are adjusted to 3 off and 4 on, WV and harvest pump timer relays energize. Once these relays energize, the pump motor rotates in the freeze cycle rotation.
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Page 53: Control Board Check
B. Control Board Check Before replacing a control board that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. Alarm Reset: If the control board is in alarm (beeping), press the "ALARM RESET" button on the control board with power on. -
Page 54: Bin Control Check
C. Bin Control Check To check the thermostatic bin control, follow the steps below. When the ambient temperature is below 45°F (7°C), the thermostatic bin control switch opens and shuts down the icemaker even if the ice storage bin is empty. When the thermostat is set in the prohibited range, the icemaker operates continuously even if the ice storage bin is filled with ice. -
Page 55: Float Switch Cleaning
8) Reconnect the black float switch connector to the control board BLACK K5 connector, then replace the control box cover in its correct position. 9) Move the control switch to the "ICE" position. Replace the insulation panel and the front panel in their correct positions, then turn on the power supply. After 1 minute, the 1-minute fill cycle should end and the initial harvest cycle should begin. -
Page 56: Thermistor Check
7) Wipe down the float switch assembly's housing, shaft, float, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with the cleaning solution. Rinse the parts thoroughly with clean water. -
Page 57: Diagnostic Charts
F. Diagnostic Charts 1. No Ice Production Problem Possible Cause [1] The icemaker will not a) Power Supply start. b) Transformer (115V primary) (3 phase only) c) Water Supply d) Thermostatic Bin Control e) Fuse (Control Box) f) Control Switch g) High Pressure Control Remedy 1. - Page 58 Problem Possible Cause [1] The icemaker will not h) Transformer start. (continued) i) Wiring to Control Board 1. Loose connections or j) Interlock Switch (Cleaning Valve) k) Thermistor l) Hot Gas Valve m)Control board green "BC CLOSED" LED off and/or yellow "BC OPEN"...
- Page 59 Problem Possible Cause [3] Compressor will a) Magnetic Contactor not start or stops operating. b) Start Capacitor or Run Capacitor c) Internal Overload Protector Open (check 1 through 3 to the right and d through f below) d) Starter e) Compressor f) Control Board [4] Water continues to a) Water Pressure...
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Page 60: Evaporator Is Frozen Up
Problem Possible Cause [7] Fan motor will a) Fan Motor not start, or is not operating (except water-cooled model). b) Control Board [8] All components a) Refrigerant run, but no ice is produced. b) Compressor c) Hot Gas Valve d) Liquid Line Valve (if applicable) e) Inlet Water Valve f) Expansion Valve... - Page 61 Problem Possible Cause [1]Freeze cycle time is f) Thermistor too long. (continued) g) Refrigerant Charge h) Expansion Valve i) Control Board [2]All ice formed on a) Evaporator evaporator does not fall into bin in harvest b) Ambient and/or Water cycle. Temperature c) Water Supply Line d) Water System...
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Page 62: Low Ice Production
Problem Possible Cause [3]Other. a) Ice Cube Guide b) Thermostatic Bin Control 3. Low Ice Production Problem Possible Cause [1] Freeze cycle time is a) Inlet Water Valve long. b) Float Switch c) Evaporator d) Spray Tubes e) Water Pump f) Condenser (except water-cooled model) g) Refrigerant Charge... -
Page 63: Abnormal Ice
Problem Possible Cause [2] Harvest cycle time is a) Water Supply long. b) Thermistor c) Control Board d) Inlet Water Valve e) Evaporator f) Hot Gas Valve g) Expansion Valve h) Water Regulating Valve (water-cooled model) i) Liquid Line Valve (if applicable) 4. - Page 64 Problem Possible Cause [2] Cloudy or irregular a) Evaporator cubes. b) Water System c) Spray Guide 5. Other Problem Possible Cause [1] Icemaker will not stop a) Thermostatic Bin when bin is filled with Control ice. [2] Abnormal noise. a) Pump Motor b) Fan Motor (except water-cooled model) c) Compressor...
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Page 65: 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 control switch to the "OFF" position and turn off the power supply before servicing. -
Page 66: 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 67: Removal And Replacement Of Compressor
For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled model, 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 68: Removal And Replacement Of Expansion Valve
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) Remove the drier, then place the new drier in position. 11) Remove the plugs from the suction, discharge, and process pipes. -
Page 69: Removal And Replacement Of Hot Gas Valve Or Liquid Line Valve
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 70: Removal And Replacement Of Evaporator
10) 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. 11) Cut the leads of the solenoid allowing enough lead length to reconnect using closed end connectors. -
Page 71: Removal And Replacement Of Air-Cooled Condenser
F. 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 72: Removal And Replacement Of Water-Cooled Condenser
G. 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 73: Removal And Replacement Of Remote Air-Cooled Condenser
H. Removal and Replacement of Remote 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 74: Removal And Replacement Of Water Regulating Valve (Water-Cooled Model)
I. 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. Install the new drier with the arrow on the drier in the direction of the refrigerant flow. -
Page 75: Adjustment Of Water Regulating Valve (Water-Cooled Model)
18) Check for water leaks. 19) Replace the panels in their correct positions. 20) Turn on the power supply. J. Adjustment of Water Regulating Valve (water-cooled model) The water regulating valve (also called "water regulator") is factory set, and generally no adjustment is required. -
Page 76: Removal And Replacement Of Thermistor
8) Braze all fittings with nitrogen gas flowing at a pressure of 3 to 4 PSIG. 9) 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). -
Page 77: Removal And Replacement Of Fan Motor (Air-Cooled And Remote Air-Cooled Models)
11) Connect the white thermistor connector through the bushing of the control box to the control board WHITE K3 connector. Do not cut the leads of the thermistor. 12) Replace the control box cover and the panels in their correct positions. 13) Turn on the power supply. -
Page 78: Removal And Replacement Of Pump Motor
10) Turn on the power supply. 11) Check for leaks. 12) Replace the front panel in its correct position. 13) Turn on the power supply. O. Removal and Replacement of Pump Motor 1) Turn off the power supply. 2) Remove the front panel and the insulation panel. 3) Drain the water tank by removing the cap located on the front bottom part of the ice dropping hole. -
Page 79: Removal And Replacement Of Control Board
P. Removal and Replacement of Control Board When replacing a control board follow the precautions below. 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. It is especially important to touch the metal part of the unit before handling or replacing the control board. -
Page 80: Cleaning And Maintenance
A. Cleaning and Sanitizing Instructions Hoshizaki recommends cleaning this icemaker at least once a year. More frequent cleaning, however, may be required in some existing water conditions. 1. To prevent injury to individuals and damage to the icemaker, do not use ammonia type cleaners. -
Page 81: Cleaning Procedure
1. Cleaning Procedure 1) Dilute 27 fl. oz. (800 ml) of Hoshizaki "Scale Away" with 5 gal. (19 l) of warm water. 2) Remove all ice from the evaporator and the storage bin. Note: To remove cubes on the evaporator, turn off the power supply and turn it on after 3 minutes. -
Page 82: Sanitizing Procedure - Following Cleaning Procedure
18) Replace the front panel in its correct position. 19) Turn on the power supply to fill the water tank with water. 20) Turn off the power supply after 3 minutes. 21) Remove the front panel and fully open the cleaning valve. 22) Move the control switch to the "WASH"... -
Page 83: Maintenance Instructions
B. Maintenance Instructions This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker. 1. Stainless Steel Exterior To prevent corrosion, wipe the exterior occasionally with a clean, soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up. 2. - Page 84 5) Open the water regulating valve by using a screwdriver to pry up on the spring retainer underneath the spring. While holding the valve open, blow out the condenser using the compressed air or carbon dioxide supply until water stops coming out. 6) Close the drain valve(s) and replace the right side panel in its correct position.