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Summary of Contents for Hoshizaki KMS-1401MLJ
- Page 1 Hoshizaki Hoshizaki America, Inc. Modular Crescent Cuber Serenity Series Model KMS-1401MLJ Including Condensing Unit Models SRK-14J/3 SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com Number: 73192 Issued: 12-28-2011...
- Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the icemaker. 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
Retain this booklet for any further reference that may be necessary. CONTENTS Important Safety Information ....................5 I. Specifications ........................7 A. Icemaker ........................7 1. KMS-1401MLJ with SRK-14J ................... 7 2. KMS-1401MLJ with SRK-14J3 ................8 B. Condensing Unit ......................9 1. SRK-14J ........................9 2. SRK-14J3 ......................10 II. - Page 4 III. Technical Information ...................... 24 A. Water Circuit and Refrigeration Circuit ................ 24 B. Wiring Diagrams ......................25 1. KMS-1401MLJ with SRK-14J ................. 25 2. KMS-1401MLJ with SRK-14J3 ................26 3. Wire Harness Connections ..................27 C. Performance Data ....................... 28 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 icemaker, or damage to property. WARNING Indicates a hazardous situation which could result in death or serious injury. - Page 6 WARNING, continued For KMS • Power supply and ground connection are supplied from the SRK remote condensing unit via the wire harness provided. Do not connect the wire harness leads to an external power source. • Wire harness routing (conduit) and disconnect (if required) must meet national, state, and local electrical code requirements.
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Page 7: Specifications
I. Specifications A. Icemaker 1. KMS-1401MLJ with SRK-14J AC SUPPLY VOLTAGE 115VAC Supplied by SRK-14J via Factory Supplied Wire Harness APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) lb./day ( kg/day ) *1420 (644) 1379 (626) 1278 (580) -
Page 8: Kms-1401Mlj With Srk-14J3
2. KMS-1401MLJ with SRK-14J3 Data Pending Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 9: Condensing Unit
B. Condensing Unit 1. SRK-14J AC SUPPLY VOLTAGE 208-230/60/1 ( 3 wire with neutral for 115V ) (115VAC Supplied to KMS via Factory Wire Harness) AMPERAGE 13.5 A ( 5 Min. Freeze AT 104°F / WT 80°F ) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A... -
Page 10: Srk-14J3
2. SRK-14J3 Data Pending Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 11: General Information
II. General Information A. Construction 1. Icemaker Spray Tubes Hot Gas Valve Wash Valve Harvest Water Valve (WV2) Liquid Line Valve Service Valve (High Side) Drier Service Valve (Low Side) Thermistor Control Board Control Box Fill/Refill Water Valve (WV1) Control Switch Service Switch Fuse Pump Motor... -
Page 12: Condensing Unit
2. Condensing Unit SRK-14J Control Box SRK-14J3 Control Box Fuse Fuse Condenser Headmaster (C.P.R.) Hot Gas Valves Liquid Line Valve Shut-Off Valve (Low Side) Check Valve Fan Motors and Fan Blades Shut-Off Valve (High Side) High Pressure Switch Receiver Compressor Thermostat (Discharge Pipe) Accumulator... -
Page 13: Sequence Of Operation
B. Sequence of Operation 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. When power is supplied, the red "POWER OK" LED and the green "BC CLOSED" LED on the CB turn on (If yellow "BC OPEN"... -
Page 14: D) Pump-Out Cycle
d) Pump-Out Cycle LEDs 1, 3, and 2 are on. Comp and FMRs remain energized, HGVs and X10 relay energize. LLVs de-energize. PM stops for 2 seconds, then X11 relay energizes, allowing PM and DV to energize for 10 or 20 seconds (S4 dip switch 3 & 4). Water is removed from the bottom of the water tank and sent down the drain. -
Page 15: Sequence Flow Chart
2. Sequence Flow Chart... -
Page 16: Control Board
C. Control Board • A Hoshizaki exclusive control board is employed in the Hoshizaki icemakers. • All models are pretested and factory adjusted. • For a control board check procedure, see "IV.B. Control Board Check." NOTICE • Fragile, handle very carefully. -
Page 17: Control Board Layout
1. Control Board Layout "G" Control Board • "ALARM RESET" Button • S4 Dip Switch • "OUTPUT TEST" Button (used to test relays on control board) • Bin Control Switch Closed LED (green) • Bin Control Switch Open LED (yellow) •... -
Page 18: Led Lights And Audible Alarm Safeties
2. 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 remains on unless a control voltage problem occurs. -
Page 19: 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 20: C) Pump-Out Timer (S4 Dip Switch 3 & 4)
c) Pump-Out Timer (S4 dip switch 3 & 4) The 1st pump-out occurs after the 11th freeze cycle, then every 10th cycle thereafter. When a pump-out is called for, the X10 relay is energized and the X13 relay is de-energized to allow the drain valve to energize. The pump motor stops for 2 seconds, then the X11 relay energizes, allowing the pump motor and drain valve to energize. -
Page 21: 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 your local Hoshizaki distributor or Hoshizaki Technical Support for recommendations. Dip Switch Setting... -
Page 22: H) Float Switch Selector (S5 Dip Switch 1)
(S5 dip switch 2 through 5) determines the number of refills. The KMS-1401MLJ uses a single float switch with a double float switch, upper float switch refill initiation float switch selector setting and is set for 1 refill. When the freeze cycle starts, the control board monitors the upper float switch. -
Page 23: Control And Service Switches
D. Control and Service Switches 2 switches are used to control the operation of the icemaker. These switches are referred to as control switch and service switch. They are located on the KMS switch box. 1. Control Switch The control switch has three positions: "OFF" for power off; "ICE" for icemaking, and "SERVICE"... -
Page 24: Technical Information
III. Technical Information A. Water Circuit and Refrigeration Circuit... -
Page 25: Wiring Diagrams
B. Wiring Diagrams 1. KMS-1401MLJ with SRK-14J... -
Page 26: Kms-1401Mlj With Srk-14J3
2. KMS-1401MLJ with SRK-14J3... -
Page 27: Wire Harness Connections
3. Wire Harness Connections... -
Page 28: Performance Data
C. Performance Data 1. KMS-1401MLJ with SRK-14J APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1420 1379 1278 80/27 1389 1325 1199 90/32 1379 1280 1162 lbs./day kg./day 100/38 1344 1252 1054... -
Page 29: Kms-1401Mlj With Srk-14J3
2. KMS-1401MLJ with SRK-14J3 Data Pending Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. 2. We reserve the right to make changes in specifications and design without prior... -
Page 30: Service Diagnosis
IV. Service Diagnosis WARNING • This icemaker 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. Use extreme caution and exercise safe electrical practices. •... - Page 31 4) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. Comp, FMRs, HGVs, X10 relay, WV2, X12, and X13 relays energize. WV1 de-energizes. 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 32 PM interruption). LLVs energize. WV1 and LED 4 energize for 1 min. HGVs, X10, X11, and X13 relays de-energize. Refill – LEDs 1 and 4 are on. The KMS-1401MLJ uses a single F/S with a double F/S, UF/S refill initiation float switch selector setting (S5 dip switch 1) and is set for 1 refill (S5 dip switch 2 through 5).
- Page 33 6) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out) – The 1st pump-out occurs after the 11th freeze cycle, then every 10th cycle thereafter. Comp and FMRs remain energized. HGVs and X10 relay energize. LLVs de-energize. PM de-energizes for 2 seconds, then X11 relay energizes, allowing PM and DV to energize for 10 seconds.
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Page 34: Control Board Check
B. 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 35: Bin Control Check And Cleaning
C. Bin Control Check and Cleaning This icemaker uses a BC with a lever-actuated proximity switch to control the ice level in the storage bin. No adjustment is required. 1. Bin Control Check To check BC, follow the steps below. 1) Turn off the power supply. -
Page 36: Bin Control Cleaning
5) Remove the actuator paddle from the switch mount. See Fig. 1. 6) Wipe down BC with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Rinse the parts thoroughly with clean water. 7) Reassemble BC and replace it in its correct position. -
Page 37: Float Switch Check And Cleaning
D. Float Switch Check and Cleaning F/S is used to determine that there is sufficient water in the water tank after the 1-minute fill cycle and after each harvest cycle. F/S 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 38: Float Switch Cleaning
9) Wipe down F/S 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 cleaning solution. Rinse the parts thoroughly with clean water. -
Page 39: Thermistor Check
E. Thermistor Check To check thermistor resistance, follow the steps below. 1) Turn off the power supply. 2) Remove the front panel, then move the control switch to the "OFF" position. 3) Remove the top and right side panels, then remove the control box cover. 4) Remove the thermistor. -
Page 40: Diagnostic Charts
F. Diagnostic Charts 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. (208-230VAC/115VAC) (3 Phase b) Coil winding open or shorted. -
Page 41: Freeze-Up
Defrost and clean the icemaker prior to diagnosing freeze-up. See "VI.A. Cleaning and Sanitizing Instructions." Fill out a freeze-up checklist. The freeze-up checklist can be found in the Hoshizaki Technician's Pocket Guide or contact your local distributor for a copy of the freeze-up checklist. - Page 42 Freeze-Up - Possible Cause 6. Float Switch a) Dirty, sticking. See "IV.D. Float Switch Check b) Defective. and Cleaning" 7. Refrigerant Charge a) Low. 8. Control Board a) Harvest timer (S4 dip switch 1 & 2) set too short. See "II.C.3. Controls and b) Harvest pump timer (S4 dip switch 7) not in factory default position.
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Page 43: Low Ice Production
3. Low Ice Production Low Ice Production - Possible Cause Long Harvest Cycle 1. Evaporator a) Scaled up. 2. Spray Tubes and/or Spray a) Dirty. Guides b) Out of position. 3. Refrigerant Charge a) Low. 4. Water Supply a) Low water pressure. b) External water filters clogged. -
Page 44: Replacement Of Components
V. Replacement of Components WARNING • This icemaker 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 before servicing. -
Page 45: Brazing
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 nameplate on the condensing unit or 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: Important Notes For Component Replacement
• 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: Cleaning And Maintenance
VI. Cleaning and Maintenance This icemaker must be cleaned and maintained in accordance with the instruction manual and labels provided with the icemaker. Consult with your local Hoshizaki Certified Service Representative about cleaning and maintenance service. WARNING • Only qualified service technicians should service this icemaker. -
Page 49: Cleaning Procedure
1. Cleaning Procedure 1) Dilute 22 fl. oz. (650 ml) of Hoshizaki "Scale Away" with 4 gal. (15 l) of warm water. 2) Remove all ice from the evaporator and the dispenser unit/storage bin. Note: To remove cubes on the evaporator, turn off the power supply and turn it back on after 3 minutes. -
Page 50: Sanitizing Procedure - Following Cleaning Procedure
21) Remove the front panel. 22) Move the control switch to the "SERVICE" position, then move the service switch to the "WASH" position. 23) Replace the front panel in its correct position. 24) Turn on the power supply to rinse off the cleaning solution. 25) Turn off the power supply after 5 minutes. -
Page 51: Maintenance
B. Maintenance This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker. WARNING • Only qualified service technicians should service this icemaker. • Move the control switch to the "OFF" position and turn off the power supply to the SRK condensing unit before servicing the KMS or SRK. -
Page 52: Preparing The Icemaker For Periods Of Non-Use
C. Preparing the Icemaker for Periods of Non-Use NOTICE • When storing the icemaker 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 icemaker with the control switch in the "SERVICE"... - Page 53 17) From the tee on the drain hose, blow out the drain valve using compressed air or carbon dioxide. 18) Move the service switch to the "CIRC." position and the control switch to the "OFF" position. 19) Turn off the power supply. 20) Reconnect the thermistor connector to the control board K3 (white) connector.
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Page 54: Disposal
VII. Disposal This icemaker 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.
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