Related Manuals for Hoshizaki SRK-10J
Summary of Contents for Hoshizaki SRK-10J
- Page 1 Service Manual Modular Crescent Cuber Serenity Series Models KMS-830MLJ Including Condensing Unit Model SRK-10J hoshizakiamerica.com Number: 73227 Issued: 10-18-2018...
- Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the appliance. 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 ............47 VII. Disposal ......................... 48 VIII. Technical Information ....................49 A. Specification and Performance Data Sheets ............... 49 1. KMS-830MLJ with SRK-10J ................... 49 2. SRK-10J ........................ 50 B. Wiring Diagrams ......................51 1. Wire Harness Connections ..................51...
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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 For KMS • Risk of electric shock. Control switch in "OFF" position does not de-energize all loads. • 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.
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Page 7: Construction And Water/Refrigeration Circuit Diagrams
I. Construction and Water/Refrigeration Circuit Diagrams A. Construction 1. Icemaker Insulation Inlet Water Valve Spray Guide Spray Tube Thermostatic Expansion Valve Evaporator Control Box Insulation Control Switch Fuse (KMS) Strainer Liquid Line Valve Hot Gas Valve Float Switch Drier Pump Motor Cleaning Valve Insulation Sheet... -
Page 8: Condensing Unit
Liquid Line Valve High-Pressure Switch Hot Gas Valve Magnetic Fan Motors and Fan Blades Contactor Headmaster Start Relay Fuse Fan Motor Capacitor Control Box Capacitors Compressor Crankcase Heater Receiver Suction Line Shutoff Valve Accumulator Liquid Line Shutoff Valve Model Shown: SRK-10J... -
Page 9: Water/Refrigeration Circuit Diagram
B. Water/Refrigeration Circuit Diagram... -
Page 10: Sequence Of Operation And Service Diagnosis
II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Chart 1. Operation Flow Chart... -
Page 11: Shutdown Flow Chart
2. Shutdown Flow Chart... -
Page 12: Service Diagnosis
• The appliance should not be located in a corrosive environment. SRK-10J: • A dry and well ventilated area with 24" (61 cm) clearance in both front and rear for proper air circulation and ease of maintenance and/or service should they be required. - Page 13 3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED and CB green "BC CLOSED" LED turn on. If CB yellow "BC OPEN" LED is on (indicating a full bin), check BC. Move ice away from BC actuator paddle.
- Page 14 4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGVs, and FMR energized), continue to step 5a. If FS is open, WV remains energized until FS closes (low water safety protection during initial start up and at the end of each harvest).
- Page 15 5b) Harvest Pump Timer (Harvest Assist) – LEDs 1, 3, and 2 are on. 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. When WV de-energizes, LED 4 turns off, X11 relay de-energizes and LED 3 turns on.
- Page 16 a) Freeze Cycle Diagnosis: Confirm Comp, FMR, and PM continue. Confirm that FM and LLVs energize. Next, confirm HGVs, X10 relay de-energize. During the first 5 min. of freeze, confirm evaporator is cooling. If not, confirm WV de-energized (not leaking by), HGVs de-energized (not bypassing), LLVs and FM energizes, TXV and HM operate correctly, Comp is efficient, and refrigerant charge is correct.
- Page 17 f) Refrigerant Pressures, HM, and TXV Diagnosis: If evaporator is still not cooling, check refrigerant pressures. See "VIII.A. Specification and Performance Data Sheets." Next, check HM operation. If refrigeration pressures are above HM setpoint and HM is bypassing, replace HM. Check TXV for proper operation. Remove TXV bulb and hold it in your hand, refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant low-side pressure should drop.
- Page 18 a) Pump-Out Diagnosis: In the freeze cycle before pump-out (see table above), after 5 min. of freeze disconnect CB black K5 connector (FS connector). Check that PM stops and re-starts. Next, check that PM rotation is correct (water flowing down the drain through CV).
- Page 19 2. Shutdown Diagnosis When BC is activated (BC open), the yellow "BC OPEN" LED comes on. The icemaker then shuts down as outlined in the table below. Cycle at Bin Shutdown Control Activation Fill Cycle 15 seconds after activation. Harvest Cycle At the end of the harvest cycle, or up to 15 seconds into the freeze cycle if activated at the end of the harvest cycle.
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Page 20: Control Board Check
C. 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 21 4) To verify voltage output from CB to the components, slide the CB K1 connector out far enough to allow multimeter lead contact. With the icemaker in the cycle to be tested, check output voltage from the corresponding pin on CB K1 connector to a neutral (W). If output voltage is not found and the appropriate LED is on, replace CB.
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Page 22: Bin Control Check
D. Bin Control Check This appliance uses a BC with a lever-actuated proximity switch to control the ice level in the storage bin. No adjustment is required. BC is connected to CB K4 (red) connector. When calling for ice, BC proximity switch is closed (green "BC CLOSED" LED on). When BC actuator paddle is engaged, BC proximity switch is open (yellow "BC OPEN"... - Page 23 11) Allow the unit to cycle on. Press and hold the actuator paddle. CB yellow "BC OPEN" LED turns on and the unit shuts down according to the chart above. If not, replace CB. 12) Turn off the power supply. 13) If BC assembly was removed, replace BC assembly in its correct position.
- Page 24 See Fig. 3. 6) Remove BC from the extension bracket. 7) Wipe down BC assembly with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Rinse the parts thoroughly with clean water. 8) Reassemble BC assembly and replace it in its correct position.
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Page 25: Float Switch Check And Cleaning
E. 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 26 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.
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Page 27: Thermistor Check
F. 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 28: Diagnostic Tables
H. Diagnostic Tables Before consulting the diagnostic tables, check for correct installation, proper voltage per nameplate, and adequate water pressure (10 to 113 PSIG). Check control board using the steps in "II.C. Control Board Check." 1. No Ice Production No Ice Production - Possible Cause 1. - Page 29 2. Freeze-Up Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See "II.I. Freeze Up Check List," the Hoshizaki Technician's Pocket Guide or contact your local distributor for a copy of the freeze-up checklist. Freeze-Up - Possible Cause Harvest Cycle 1.
- Page 30 Freeze-Up - Possible Cause 8. Control Board a) Harvest timer (S4 dip switch 1 & 2) set too short. See "III. Controls and b) Harvest pump timer (S4 dip switch 7) not in factory default position. Adjustments" and "II.C. Control c) Defective.
- Page 31 3. Low Ice Production Low Ice Production - Possible Cause Long Harvest Cycle 1. Evaporator a) Scaled up. 2. Spray Tubes, Spray Guides, and a) Dirty. Splash Guard b) Out of position. 3. Refrigerant Charge a) Low. 4. Water Supply a) Low water pressure.
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Page 32: Freeze-Up Check List
I. 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 33: Controls And Adjustments
III. Controls and Adjustments • A Hoshizaki exclusive control board is employed in the KMS-830MLJ series. • All models are pretested and factory adjusted. • For a control board check procedure, see "II.C. Control Board Check." NOTICE • Fragile, handle very carefully. -
Page 34: Control Board Layout
A. Control Board Layout "J" Control Board • Bin Control Switch Closed LED (green) • "OUTPUT TEST" Button • S4 Dip Switch • "ALARM RESET" Button (used to test relays on control board) • Bin Control Switch • K3 (white) Connector Open LED (yellow) Thermistor (harvest control and... -
Page 35: Led Lights And Audible Alarm Safeties
Correct green LED lighting sequence is 1, 4, 3, 2. Components (e.g., compressor) cycle during test. Following test, icemaker resumes operation. Dip switches must be adjusted per unit’s service manual or Hoshizaki Technical Support recommendation. S4 dip switch 8 must remain off. -
Page 36: Settings And Adjustments
C. 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 Hoshizaki Technical Support at 1-800-233-1940. 1. Default Dip Switch Settings The dip switches are factory-adjusted to the following positions: S4 Dip Switch Dip Switch No. -
Page 37: Harvest Timer (S4 Dip Switch 1 & 2)
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 38: 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 39: Harvest Pump Time (Harvest Assist) (S4 Dip Switch 7)
6. Harvest Pump Time (Harvest Assist) (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 40: Freeze Timer (S4 Dip Switch 9 & 10)
In this case, see "II.H.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. S4 Dip Switch Setting Time (min.) -
Page 41: Refill Counter (S5 Dip Switch 2 And 3)
10. Refill Counter (S5 dip switch 2 and 3) NOTICE Do not adjust. These must be left in the factory default position or the icemaker will not operate correctly. S5 Dip Switch Setting Refill Counter No. 2 No. 3 1 refill 9 refills 10 refills 11. -
Page 42: 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 43 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 44 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 45: 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 46: 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 47: 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 48: 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 49: Technical Information
We reserve the right to make changes in specifications and design without prior notice. A. Specification and Performance Data Sheets Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference only. 1. KMS-830MLJ with SRK-10J Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 10.6 A ( 5 Min. -
Page 50: Srk-10J
2. SRK-10J Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 wire with neutral for 115V ) (115VAC Supplied to KMS via Factory Wire Harness) AMPERAGE 11.9 A ( 5 Min. Freeze AT 104°F / WT 80°F ) MINIMUM CIRCUIT AMPACITY... -
Page 51: Wiring Diagrams
B. Wiring Diagrams 1. Wire Harness Connections... -
Page 52: Kms-830Mlj With Srk-10J
2. KMS-830MLJ with SRK-10J...
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