Related Manuals for Hoshizaki KMH-2100SWJ3
Summary of Contents for Hoshizaki KMH-2100SWJ3
- Page 1 Service Manual Stackable Crescent Cuber Models KMH-2100SWJ3, SRJ/3 Number: 73226 hoshizakiamerica.com Issued: 7-5-2018...
- Page 2 Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, send an e-mail message, or write to the Hoshizaki Technical Support Department for assistance. Phone: 1-800-233-1940; (770) 487-2331 Fax: 1-800-843-1056;...
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Page 3: Table Of Contents
IMPORTANT This manual should be read carefully before the appliance is serviced. Read the warnings and guidelines contained in this manual carefully as they provide essential information for the continued safe use, service, and maintenance of the appliance. Retain this manual for any further reference that may be necessary. CONTENTS Important Safety Information .................... - Page 4 VI. Preparing the Appliance for Periods of Non-Use ............50 VII. Disposal ......................... 52 VIII. Technical Information ....................53 A. Specification and Performance Data ................53 1. KMH-2100SWJ3 ....................53 2. KMH-2100SRJ ....................... 54 3. KMH-2100SRJ3 ....................55 B. Wiring Diagrams ......................56 1.
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Page 5: Important Safety Information
Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, damage to the appliance, or damage to property. WARNING Indicates a hazardous situation which could result in death or serious injury. - Page 6 WARNING, continued • The appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. •...
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Page 7: Construction And Water/Refrigeration Circuit Diagram
I. Construction and Water/Refrigeration Circuit Diagram A. KMH Construction 1. Water-Cooled Models (SWJ3) Spray Tubes Inlet Water Valve Junction Boxes Evaporator Assembly Water Supply Inlet Cleaning Valve Check Valve (water) Water Pump Control Box Float Switch Main Transformer Box Bin Control Thermostat (3 phase models) Control Switch Low-Side Service Valve... -
Page 8: Remote Models (Srj/3)
2. Remote Models (SRJ/3) Spray Tubes Inlet Water Valve Junction Boxes Evaporator Assembly Water Supply Inlet Compressor Cleaning Valve Check Valve (water) Water Pump Control Box Float Switch Main Transformer Box Bin Control Thermostat (3 phase models) Control Switch High-Side Service Valve Liquid-Line Low-Side Service Valve Service Valve... -
Page 9: Bin Control
Bin Control Bulb Holder C Silicone Hose Bin Control Extension Bracket Bin Control Bulb Holder Z Bracket Used for Hoshizaki B-1300, B-1500, B-1650, and Non-Hoshizaki Ice Stoarage 1b. Stacked Thermostatic Bin Control Upper Bin Control Bulb Holder Lower Bin Control Bulb Holder... -
Page 10: Water/Refrigeration Circuit Diagram
C. Water/Refrigeration Circuit Diagram 1. Water-Cooled Models (SWJ3) -
Page 11: Remote Models (Srj/3)
2. Remote Models (SRJ/3) -
Page 12: Sequence Of Operation And Service Diagnosis
II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Chart 1. Operation Flow Chart... -
Page 13: Shutdown Flow Chart
2. Shutdown Flow Chart... -
Page 14: Freeze-Time Correction Chart
3. Freeze-Time Correction Chart... -
Page 15: Service Diagnosis
B. Service Diagnosis WARNING • The appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Risk of electric shock. Control switch in "OFF" position does not de-energize all loads Use extreme caution and exercise safe electrical practices. - Page 16 1. Operation Diagnosis 1) Turn off the power supply, then access the control box. Move ice away from BC bulb. 2) Check that 115VAC 10A fuse is good. 3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec.
- Page 17 5a) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay continue. Comp, FMR, HGV, X10, and X12 relays energize. CB monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ...
- Page 18 5c) Initial Harvest Cycle Termination Diagnosis: When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). Check discharge line temperature.
- Page 19 d) PM Diagnosis: Confirm water is flowing over evaporator from PM and not WV. If PM de-energizes once freeze begins, check for 115VAC at CB K1 #4 (R) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present and PM is de-energized, check for 115VAC at control switch #5 (W/R) to neutral (W).
- Page 20 7) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the first pump-out is determined by S4 dip switch 5. See the table below. Control Board Settings S4 Dip Switch Pump-Out 1st Pump-Out Setting Frequency No.
- Page 21 8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above. Note: Appliance continues to cycle until BC is satisfied, power is switched off or freeze-time correction cycle is initiated. The appliance always restarts at the 1-min.
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Page 22: Freeze-Time Correction Cycle (90 Min.)
C. Freeze-Time Correction Cycle (90 min.) Freeze-Time Correction function is enabled when S4 Dip Switch 7 is in the "ON" position and initiates when the minimum and maximum freeze times have exceeded differential parameters. Freeze-time correction timer and count starts at the beginning of the 2nd freeze cycle after startup from power off condition. - Page 23 2) Freeze-Time Correction Sequence: First occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters. CB "POWER OK" LED starts blinking. Freeze-Time Correction Cycle starts. Second occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters.
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Page 24: Control Board Check
D. Control Board Check Before replacing CB 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 CB is in alarm (beeping), press the "ALARM RESET" button on CB while CB is beeping. -
Page 25: Bin Control Check
E. Bin Control Check BC shuts down the icemaker within 10 sec. when ice contacts the thermostatic bulb, regardless of the cycle at activation. NOTICE When the ambient temperature is below 45°F (7°C), BC opens and shuts down the appliance even if the ice storage bin is empty. When BC is set in the prohibited range, the appliance operates continuously even if the ice storage bin is filled with ice. -
Page 26: 1A. Single Thermostatic Bin Control Layout
Bin Control Bulb Holder C Silicone Hose Bin Control Extension Bracket Bin Control Bulb Holder Z Bracket Used for Hoshizaki B-1300, B-1500, B-1650, and Non-Hoshizaki Ice Stoarage Fig. 1 1b. Stacked Thermostatic Bin Control Layout Upper Bin Control Bulb Holder... -
Page 27: Float Switch Check And Cleaning
F. Float Switch Check and Cleaning FS is used to determine that there is sufficient water in the water tank after the 1-min. fill cycle and after each harvest cycle. FS is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle. No adjustment is required. -
Page 28: Float Switch Cleaning
Be careful not to bend the retainer rod excessively when removing it. 7) Wipe down FS 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 cleaning solution. -
Page 29: Thermistor Check
G. Thermistor Check To check thermistor resistance, follow the steps below. 1) Turn off the power supply. 2) Remove the front panel. Move the control switch to the "OFF" position. 3) Remove the control box cover. 4) Remove the thermistor from the refrigerant tubing. 5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min. -
Page 30: Diagnostic Tables
I. Diagnostic Tables 1. No Ice Production No Ice Production - Possible Cause 1. Power Supply a) Off, blown fuse, or tripped breaker. b) Not within specifications. 2. Main Transformer a) Voltage tap switch not set to proper voltage. (if applicable) b) Coil winding open or shorted. - Page 31 No Ice Production - Possible Cause 15. Pump Motor a) Motor winding open. b) Bearing worn out or locked rotor. c) Defective capacitor. d) Mechanical seal worn out. 16 Thermostatic Expansion Valve a) Bulb loose. b) Operating erratically. 17. Liquid Line Valve a) Closed in freeze cycle.
- Page 32 3. Freeze-Up Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See "II.J. Freeze Up Check List," the Hoshizaki America Technician's Pocket Guide, or contact your local distributor for a copy of the freeze-up checklist.
- Page 33 Freeze-Up - Possible Cause 6. Float Switch a) Dirty, sticking. See "II.F. Float Switch Check and b) Defective. Cleaning" 7. Refrigerant Charge a) Low. 8. Control Board a) Harvest timer (S4 dip switch 1 & 2) set too short. See "II.D. Control Board b) Harvest pump time (harvest assist) (S4 dip switch 7) not in factory Check"...
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Page 34: Freeze-Up Check List
J. Freeze-Up Check List Freeze-Up Check List Please Complete When Diagnosing a Freeze-Up, Refrigerant Leak, or Low Charge Technical Support Fax #: 770-487-3360 Make Copies And Use As Needed Model #___________________________ Serial # ____________________Install Date____________Freeze-Up Date___________ List model and manufacture of bin or dispenser__________________________. Date appliance was last cleaned:__________. -
Page 35: Controls And Adjustments
III. Controls and Adjustments • A Hoshizaki exclusive control board is employed in KM and KMH series appliances. • All models are pretested and factory adjusted. • For a control board check procedure, see "II.D. Control Board Check." NOTICE • Fragile, handle very carefully. -
Page 36: Control Board Layout
A. Control Board Layout • Bin Control Switch Closed LED (green) • "OUTPUT TEST" Button • S4 Dip Switch • "ALARM RESET" Button (used to test relays on control board) • K3 (white) Connector • Bin Control Switch Open LED (yellow) Thermistor (harvest control, anti- slush control, and high... -
Page 37: Led Lights And Audible Alarm Safeties
B. LED Lights and Audible Alarm Safeties Beep occurs and red "POWER OK" LED turns on when control switch is moved to "ICE" position. Sequence Green LEDs 1 through 4 turn on and sequence from initial startup as listed in the table below. -
Page 38: Settings And Adjustments
NOTICE Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact your Hoshizaki Service Center. 1. Default Dip Switch Settings The dip switches are factory-adjusted to the following positions: S4 Dip Switch S4 Dip Switch No. -
Page 39: Harvest Time (S4 Dip Switch 1 & 2)
2. Harvest Time (S4 dip switch 1 & 2) The harvest timer starts counting when the thermistor reaches 48°F (9°C) at the evaporator outlet and the control board reads 3.9 kΩ from the thermistor. The harvest timer is factory set, and generally no adjustment is required. However, a setting longer than the factory setting may be advised in cases where the drain provided at harvest needs to be prolonged for extra cleaning. -
Page 40: Pump-Out Frequency Control (S4 Dip Switch 5)
4. Pump-Out Frequency Control (S4 dip switch 5) The pump-out frequency control is factory set to drain the water tank every 10 cycles. Generally no adjustment is required. However, where water quality is bad and the icemaker needs a pump-out more often, the pump-out frequency can be adjusted. The pump-out frequency control can be set to have a pump-out occur every cycle, or every 10 cycles. -
Page 41: Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 Dip Switch 7)
6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 dip switch 7) NOTICE Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the appliance. a) Harvest Pump Time (Harvest Assist) Depending on S4 dip switch 7 setting, the pump motor either stays off or is energized during the last seconds of the harvest cycle. -
Page 42: Freeze Timer (S4 Dip Switch 9 & 10)
In this case, see "II.G.3. Low Ice Production" for possible solutions. The freeze timer is factory set and no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. - Page 43 11. Minimum Harvest Time (S5 dip switch 4) NOTICE Factory set for proper operation. Do not adjust. Adjustment outside the factory default setting may result in damage to the appliance. S5 Dip Switch Setting Minimum Harvest Timer No. 4 120 sec. 70 sec.
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Page 44: Refrigeration Circuit And Component Service Information
IV. Refrigeration Circuit and Component Service Information WARNING • This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Move the control switch to the "OFF" position and turn off the power supply. Place the disconnect in the "OFF"... - Page 45 2. Brazing WARNING • R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). • 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.
- Page 46 Remember to loosen the connection and purge the air from the hose. For the required refrigerant charge, see the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.
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Page 47: Component Service Information
• The thermistor should be at the 12 o'clock position on the tube. • Smoothly fill the recessed area of the thermistor holder with high thermal conductive type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured by ShinEtsu Silicones), or equivalent are recommended. -
Page 48: Water Regulating Valve Adjustment (Water-Cooled Models)
C. Water Regulating Valve Adjustment (water-cooled models) The water regulating valve is factory set, and generally no adjustment is required. However, when necessary, adjust the water regulator using the following procedure. 1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure gauge to the high-side line of the system. -
Page 49: Maintenance
V. Maintenance The maintenance schedule below is a guideline. More frequent maintenance may be required depending on water quality, the appliance's environment, and local sanitation regulations WARNING • Only qualified service technicians should service the appliance. • To reduce the risk of electric shock, do not touch the control switch or service switch with damp hands •... -
Page 50: Preparing The Appliance For Periods Of Non-Use
VI. Preparing the Appliance for Periods of Non-Use NOTICE • When storing the appliance for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage. • To prevent damage to the water pump, do not operate the appliance with the control switch in the "WASH"... - Page 51 3. On water-cooled model, remove the water from the water-cooled condenser: 1) Make sure the power supply is off, then remove the front, top, 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.
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Page 52: Disposal
VII. Disposal The appliance contains refrigerant and must be disposed of in accordance with applicable national, state, and local codes and regulations. Refrigerant must be recovered by properly certified service personnel. -
Page 53: Technical Information
We reserve the right to make changes in specifications and design without prior notice. A. Specification and Performance Data Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference only. 1. KMH-2100SWJ3 Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 10.0 A ( 5 Min. -
Page 54: Kmh-2100Srj
2. KMH-2100SRJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 15.1 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2910 (3.73) 2590 (3.06) WATER gal./24HR (gal./100 lbs.) -
Page 55: Kmh-2100Srj3
3. KMH-2100SRJ3 Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2700 (3.20) 2970 (3.70) WATER gal./24HR (gal./100 lbs.) -
Page 56: Wiring Diagrams
B. Wiring Diagrams 1. Single Phase Models... -
Page 57: Three Phase Models
2. Three Phase Models...
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