Hoshizaki SRC-10H Service Manual Download Page 9

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II. General Information

A. Construction

1. Icemaker

a) FS-1022MLH-C

Inlet Water Valve

Reservoir

Control Box

Mechanical Backup
Bin Control

Spout

Float Switch

Gear Motor

Thermostatic
Expansion Valve

Ice Chute

Infrared Sensor

Icemaking Unit:
Cutter
Extruding Head
Evaporator

Power Cord

Drain Valve

Pump-Down
Solenoid Valve

High-Side
Service Valve

Low-Side
Service Valve

Evaporator Heater

Strainer

Summary of Contents for SRC-10H

Page 1: ...i A Superior Degree of Reliability www hoshizaki com Model FS 1022MLH C Including Condensing Unit Model SRC 10H Modular Cubelet Serenity Series Hoshizaki America Inc Number 73186 Issued 6 9 2011 SERVICE MANUAL ...

Page 2: ...ker 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 618 Highway 74 South Peachtree City GA 30269 Attn Hoshizaki Technical Support Department Phone 1 800 233 1940 Technical Support 770 487 2331 Fax 1 800 843 1056 770 487 3360 E ...

Page 3: ...t 11 B Sequence of Operation 12 1 Sequence Cycles and Shutdown 12 a Fill Cycle 12 b Ice Purge Cycle 12 c Freeze Cycle 12 d Drain Cycle 13 e Shutdown Cycle 14 2 Sequence Flow Chart 15 C Control Board 16 1 Control Board Layout 17 2 LED Lights and Audible Alarm Safeties 18 3 Controls and Adjustments 19 a Default Dip Switch Settings 19 b Infrared Sensor Shutdown Delay S1 dip switch 1 2 3 19 c Drain Fr...

Page 4: ...charge R 404A 42 B Important Notes for Component Replacement 43 1 Upper Bearing Wear Check 45 2 Removal and Replacement of Cutter 45 3 Removal and Replacement of Extruding Head 46 4 Removal and Replacement of Auger 46 5 Removal and Replacement of Evaporator 47 6 Removal and Replacement of Mechanical Seal and Lower Housing 48 7 Removal and Replacement of Gear Motor 49 VI Cleaning and Maintenance 51...

Page 5: ...aken Place the disconnect if applicable in the off position Lockout Tagout to prevent the power supply from being turned back on inadvertently Make sure the icemaker power switch is in the OFF position before plugging in or unplugging the icemaker to reduce the risk of electric shock Do not make any alterations to the icemaker or condensing unit Alterations could result in electric shock injury fi...

Page 6: ... and must meet national state and local electrical code requirements Failure to meet these code requirements could result in death electric shock serious injury fire or severe damage to equipment The remote condensing unit requires an independent power supply of proper capacity See the nameplate for electrical specifications Failure to use a properly sized breaker or fuse can result in a tripped b...

Page 7: ...PT REFRIGERATION Suction line 1 1 16 12 UNF Fitting 10 PARKER CIRCUIT Liquid line 5 8 18 UNF Fitting 6 PARKER ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger 1 4 HP Gear Motor ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N A BIN CONTROL SYSTEM Primary Photoelctric Sensor BIN CONTROL SYSTEM Secondary Mechanical Bin Control Proximity Switch CONDENSING UNIT Air Coole...

Page 8: ...ECTRIC Permanent Connection REFRIGERATION Suction Line 1 1 16 12 UNF Fitting 10 PARKER CIRCUIT Liquid Line 5 8 18 UNF Fitting 6 PARKER COMPRESSOR Hermetic Model RS80 C2E CAV CONDENSER Air Cooled Fin and Tube Type FAN MOTOR PROTECTION Thermal Protector REFRIGERATION PROTECTION Auto Reset High Pressure Switch Manual Low Pressure Switch REFRIGERANT CONTROL Headmaster C P R 210 PSI PUMPDOWN CONTROL Au...

Page 9: ...Control Box Mechanical Backup Bin Control Spout Float Switch Gear Motor Thermostatic Expansion Valve Ice Chute Infrared Sensor Icemaking Unit Cutter Extruding Head Evaporator Power Cord Drain Valve Pump Down Solenoid Valve High Side Service Valve Low Side Service Valve Evaporator Heater Strainer ...

Page 10: ... SRC 10H Condenser Receiver Fan Motor Headmaster C P R High Side Service Valve Compressor High Pressure Switch Liquid Line Connection Suction Line Connection Control Low Pressure Switch Control Box Safety Low Pressure Switch ...

Page 11: ...earing Evaporator Heater Auger Mechanical Seal O Ring Housing Lower Bearing Spline Coupling Gear Motor Hex Bolt and Washer Evaporator Seal Bolts and Washers Socket Head Cap Screw and Split Lock Washer Washer Socket Head Cap Screw and Split Lock Washer ...

Page 12: ...nergizing Comp and FMR Control Low Pressure Switch Settings Cut Out 9 PSIG Differential 20 PSIG Cut In 29 PSIG 1 Sequence Cycles and Shutdown a Fill Cycle WTRIN LED is on WV energizes and fill cycle begins 90 second low water safety timer starts When UF S closes WV de energizes and 90 second low water safety timer resets 30 second GM delay timer starts If 90 second low water safety timer terminate...

Page 13: ...Once the low side pressure drops to 9 PSIG CLPS opens de energizing MC Comp and FMR 5 minute ice purge timer begins When the 5 minute ice purge timer terminates GMR X2 on CB GM GMPR and EH de energize 10 minute DT begins DV energizes After 10 minute DT terminates 12 hour drain cycle timer starts 3 Manual Drain Manual drain is used when servicing evaporator components and cleaning and sanitizing th...

Page 14: ...ize and the 5 minute ice purge timer begins Unit is in pump down mode Once the low side pressure drops to 9 PSIG CLPS opens de energizing MC Comp and FMR When the 5 minute ice purge timer terminates GMR X2 on CB GM and GMPR de energize Note If IS fails to shut down the icemaker MBC opens CB shuts down the icemaker and a 9 beep alarm sounds 2 Mechanical Backup Bin Control CB shuts down the entire u...

Page 15: ...d by S1 dip switch 1 2 3 4 Icemaker Restart 5 minutes Note If IS fails to shutdown the icemaker MBC opens and a 9 beep alarm sounds 4 Icemaker Restart 2 Ice Purge Cycle 3 10 Minute Drain Legend CLPS control low pressure switch Comp compressor DC drain cycle DT drain timer DV drain valve EH evaporator heater FMR fan motor remote FT fill timer low water safety GM gear motor IS infrared sensor bin co...

Page 16: ...s which are susceptible to failure due to static discharge It is especially important to touch the metal part of the icemaker before handling or replacing the control board 3 Do not touch the electronic devices on the control board or the back of the control board 4 Do not change wiring and connections Do not misconnect terminals 5 Do not short out power supply to test for voltage 6 Always replace...

Page 17: ...ntrol Switch Open Icemaking Closed Drain POWER OK LED S1 Dip Switch 1 Control Board Layout K9 Connector 5VDC K8 Connector 24VAC and 5VDC 1 Transformer 24VAC Input 2 Transformer 24VAC Neutral 3 4 Mechanical Backup Bin Control 5VDC 5 Float Switch Common 5VDC 6 Upper Float Switch 7 Lower Float Switch K7 Connector Open K2 Connector 24VAC 10 Drain Valve 9 Transformer 24VAC Input 8 Inlet Water Valve 7 T...

Page 18: ...ed Automatic reset once water supply is restored and UF S closes 2 Control Switch In DRAIN position longer than 15 minutes Automatic reset once the control switch is moved to the ICE position 3 High Pressure Switch N A on this model See III B 2 SRC 10H for high pressure switch operation 4 High Pressure Switch N A on this model 5 Freeze Timer WV off 30 minutes since last WV activation Manual reset ...

Page 19: ...sor detecting ice yellow LED flashing or steady and the start of the shutdown sequence For dispenser unit applications the ice level at shutoff may need to be adjusted depending on the dispenser agitation or dispense method Increasing the shutdown delay setting allows for a higher level of ice in the bin before the icemaker shuts down For a typical dispenser unit application a 100 second shutdown ...

Page 20: ...ime No 5 No 6 OFF OFF No Limit ON OFF 20 Seconds OFF ON 60 Seconds ON ON No Limit 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 positio...

Page 21: ... shutdown delay is the time between the mechanical bin control proximity switch opening and the control board shutting off the icemaker S1 Dip Switch Setting Mechanical Backup Bin Control Shutdown Delay No 8 OFF 0 25 Seconds ON 6 7 Seconds g Factory Use S1 Dip Switch 9 10 Factory set for optimum performance Do not adjust ...

Page 22: ...ve Water Level Evaporator Float Switch Inlet Water Valve Water Supply Line Liquid Line Drier Pump Down Solenoid Valve FS 1022MLH C SRC 10H Drain Outlet Compressor Safety Low Pressure Switch Fan Motor Condenser Headmaster C P R High Pressure Switch Low Side Service Valves High Side Service Valves Control Low Pressure Switch Receiver Strainer Suction Line ...

Page 23: ...23 B Wiring Diagrams 1 FS 1022MLH C ...

Page 24: ...sure Switch Cut out 384 22 PSIG Cut in 284 22 PSIG 0 Safety Low Pressure Switch Manual Reset Cut out 3 2 5 PSIG Differential 6 PSIG Control Low Pressure Switch Cut in 29 0 PSIG Differential 20 1 0 PSIG Cut out 9 PSIG 0 5 0 5 ...

Page 25: ...ts 100 1775 1789 1804 APPROXIMATE WATER 70 100 377 96 364 94 356 CONSUMPTION PER 24 HR 80 92 347 90 339 88 331 90 85 323 84 319 81 308 gal day l day 100 80 301 78 293 72 272 EVAPORATOR OUTLET TEMP 70 14 10 14 10 14 10 F C 80 14 10 16 9 16 9 90 16 9 16 9 18 8 100 18 8 18 8 18 8 HEAD PRESSURE 70 224 15 7 224 15 7 224 15 7 80 233 16 4 233 16 4 233 16 4 90 242 17 0 242 17 0 242 17 0 PSIG kg sq cmG 100...

Page 26: ...G and proper voltage per unit nameplate Check that the 24VAC 1A fuse and the 115VAC 3A GM fuse are good When checking for high voltage 115VAC always choose a white W neutral wire to establish a good neutral connection When checking for low voltage secondary 24VAC always choose a light blue LBU neutral wire to establish a good neutral connection If the icemaker is in alarm see II C 2 LED Lights and...

Page 27: ...Nothing occurs at this time The reservoir continues to fill until UF S closes The closing of the UF S de energizes WV terminates the 90 second low water safety timer and starts the 30 minute freeze timer Diagnosis Check that WV energizes and water fills the reservoir If not check for water supply line shut off valve closed clogged water filters and clogged WV screen Next check 24VAC to WV from CB ...

Page 28: ...S is open check that refrigeration circuit low side pressure has reached 29 PSIG If refrigeration circuit low side pressure is too low confirm proper TXV operation check for refrigerant restrictions drier PDS and correct refrigerant charge Recover evacuate and recharge if necessary SLPS If SLPS is open manually reset SLPS Confirm proper TXV operation check for refrigerant restriction drier PDS and...

Page 29: ...ck that the reservoir fills If not check for water supply line shut off valve closed clogged water filters and clogged WV screen Next check 24VAC to WV from CB K2 connector pin 8 white brown W BR wire to a light blue LBU neutral wire Check for continuity through WV solenoid If open replace WV If WV is energized and refill exceeds 90 second low water safety timer fill timer with no water in the res...

Page 30: ...pplication Infrared Sensor Bin Control with Mechanical Backup Bin Control S1 dip switch 7 in the ON position Mechanical Bin Control Standard Ice Storage Bin S1 dip switch 7 in the OFF position 2 Startup POWER OK LED on Move the control switch to the ICE position then move the power switch to the ON position The POWER OK LED turns on Diagnosis POWER OK LED Check that the POWER OK LED is on If not c...

Page 31: ...e black W BK wire to pin 2 white black W BK wire When the control switch is in the DRAIN position the control switch contacts are closed 5VDC is present from the white K5 connector pin closest to red K4 connector to the K9 connector pins 1 or 2 white black W BK wires If 5VDC is not present CB is bad and must be replaced 0VDC is present from the K9 connector pin 1 white black W BK wire to pin 2 whi...

Page 32: ... be replaced If WTRIN LED is on and 24VAC is not present from CB connector K2 connector pin 8 to any light blue LBU wire confirm 24VAC from K2 connector pin 9 to any light blue LBU wire If 24VAC is present on K2 connector pin 9 and not on K2 connector pin 8 CB is bad and must be replaced 6 Ice Purge Cycle GM LED is on GM LED is on GM and EH energize Diagnosis If GM LED is on and GM and EH are off ...

Page 33: ...If 20VDC is present and the green LED is off IS is bad and must be replaced If not see step 3 IS Power Supply under IV C Control Board Check 7 Make sure the GM LED on CB 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 CB to bypass the 5 minute ice purge cycle WARNING Risk of electric shock Care should be ...

Page 34: ...ice storage bin applications WARNING Do not place S1 dip switch 7 in the OFF position on dispenser unit applications When ice fills the chute and engages the actuator paddle MBC opens and CB shuts down the icemaker within 10 seconds 1 Remove the front panel 2 Move the power switch to the OFF position then unplug the unit from the electrical outlet 3 Remove the strap connecting the spout to the chu...

Page 35: ...e check that the actuator paddle is moving freely Confirm that the actuator paddle is engaged Check for continuity across MBC wires If MBC contacts are found open and the icemaker continues to make ice CB is bad and must be replaced If MBC is closed with the actuator paddle engaged MBC is bad and must be replaced 8 Move the power switch to the OFF position then unplug the unit from the electrical ...

Page 36: ...ater reservoir fill 10 Once the reservoir is full and GM starts move the power switch to the OFF position 11 Unplug the unit from the electrical outlet 12 Remove CB K8 connector and check F S continuity Both the UF S and LF S should be closed Check continuity between CB K8 connector pin 5 black BK common wire and K8 connector pin 6 red R UF S wire Next check continuity between CB K8 connector pin ...

Page 37: ...ing cleaning If you remove them note that the blue float is on top UF S and the white float is on bottom LF S The floats must be installed with the magnets inside them towards the top of the switch See Fig 6 Installing the floats upside down will affect the timing of F S operation 5 Rinse the float switch assembly thoroughly with clean water and replace in its correct position 6 Plug the unit into...

Page 38: ...nding open or shorted 5 Fuse Control Box a Blown 6 Control Board See IV C Control Board Check a In alarm b BC OPEN yellow LED on bin full c Defective 7 Control Switch a In DRAIN position b Bad contacts 8 Infrared Sensor Bin Control a No power lens dirty or defective b Control board dip switch 7 off 9 Mechanical Backup Bin Control a Tripped with bin filled with ice 9 beep alarm b Proximity switch s...

Page 39: ...Fan motor not operating d Refrigerant overcharged e Bad contacts f Refrigerant lines or components restricted 8 Condensing Unit Fan Motor a Magnetic contactor contacts bad or coil winding open b Motor winding open c Bearing worn out or locked rotor d Capacitor defective 9 Compressor a Magnetic contactor contacts bad or coil winding open b Motor winding open c Start capacitor or run capacitor defec...

Page 40: ...l board no power to IS 2 Mechanical Backup Bin Control a Tripped with bin filled with ice 9 beep alarm b Proximity switch stuck closed c Actuator paddle does not move freely d Control board dip switch failure 3 Pump Down Solenoid Valve a Defective stuck open 4 Control Low Pressure Switch a Defective stuck closed 5 Magnetic Contactor a Contacts stuck closed 6 Control Board a No power to IS b X1 rel...

Page 41: ...he refrigeration circuit to be opened must be performed by properly trained and EPA certified service personnel 2 Always recover the refrigerant and store it in an approved container Do not discharge the refrigerant into the atmosphere 3 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 th...

Page 42: ...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 3 When brazing protect the drier by using a wet cloth to prevent the drier from overheating Do not allow the drier to exceed 250 F 121 C 2 Use an electronic leak detector or soap bubbles...

Page 43: ... valves Close the high and low side gauge manifold valves then disconnect the gauge manifold hoses 10 Cap the service valves to prevent a possible leak B Important Notes for Component Replacement CAUTION When replacing a component listed below see the notes to help ensure proper operation Component Notes Compressor Install a new drier start capacitor run capacitor and start relay Expansion Valve I...

Page 44: ...ock Washer Gear Motor Gear Motor Barrier Lower Housing O Ring Mechanical Seal Spline Coupling Hex Bolt and Washer Socket Head Cap Screw and Split Lock Washer Washer Socket Head Cap Screw and Split Lock Washer Upper Bearing pressed into auger Lower Bearing pressed into lower housing Truss Head Screw w Rubber Washer Fig 7 Dowel Pin Seal Bolts and Washers ...

Page 45: ...earing in the lower housing should be replaced Instructions for removing the extruding head and lower housing are located later in this procedure Note Replacing the bearing requires a bearing press adaptor If one is not available replace the whole extruding head and lower housing 6 Remove the bolt Replace the washer cutter and cutter bolt 7 Replace the spout 8 Replace the top and side panels in th...

Page 46: ...e top and side panels in their correct positions 13 Move the control switch to the ICE position 14 Plug the unit into the electrical outlet then move the power switch to the ON position to start the automatic icemaking process 15 Replace the front panel in its correct position 4 Removal and Replacement of Auger 1 Remove the front panel then move the power switch to the OFF position 2 Move the cont...

Page 47: ...utlet 6 Remove the top and side panels 7 Recover the refrigerant and store it in an approved container 8 Remove the strap connecting the spout to the chute assembly then remove the spout 9 Disconnect the water hoses 10 Remove the extruding head seal bolts Using the cutter lift out the auger assembly 11 Remove the insulation and the expansion valve bulb on the suction line 12 Disconnect the inlet a...

Page 48: ...ower switch to the ON position to start the automatic icemaking process 25 Replace the front panel in its correct position 6 Removal and Replacement of Mechanical Seal and Lower Housing 6a Mechanical Seal 1 Remove the front panel then move the power switch to the OFF position 2 Move the control switch to the DRAIN position 3 Move the power switch to the ON position 4 Allow the water to drain from ...

Page 49: ... split lock washers 17 Install the auger assembly with the upper part of the mechanical seal attached 18 Replace the removed parts in the reverse order of which they were removed 19 Replace the top and side panels in their correct positions 20 Move the control switch to the ICE position 21 Plug the unit into the electrical outlet then move the power switch to the ON position to start the automatic...

Page 50: ...wires 13 Replace the removed parts in the reverse order of which they were removed 14 Replace the top and side panels in their correct positions 15 Move the control switch to the ICE position 16 Plug the unit into the electrical outlet then move the power switch to the ON position to start the automatic icemaking process 17 Replace the front panel in its correct position ...

Page 51: ...er conditions WARNING 1 To prevent injury to individuals and damage to the icemaker do not use ammonia type cleaners 2 Carefully follow any instructions provided with the bottles of cleaning and sanitizing solution 3 Always wear liquid proof gloves and goggles to prevent the cleaning and sanitizing solutions from coming into contact with skin or eyes 4 After cleaning and sanitizing do not use ice ...

Page 52: ...0 In bad or severe water conditions clean the float switch assembly as described below Otherwise continue to step 11 a Remove the float switch assembly from the reservoir cover b Wipe down the float switch assembly with the cleaning solution c Rinse the float switch assembly thoroughly with clean water d Replace the float switch assembly in its correct position Reservoir Reservoir Cover Float Swit...

Page 53: ...r the gear motor starts remove the front panel Move the power switch to the OFF position Move the control switch to the DRAIN position then move the power switch back to the ON position Replace the front panel in its correct position 18 Allow the water system to drain for 5 minutes Note If you do not sanitize the unit go to step 14 in III A 5 Sanitizing Procedure Final 19 Remove the front panel Mo...

Page 54: ...talling the baffles make sure that the bent surface the one without the studs faces the actuator so that the bent surface can guide the ice to the center of the actuator 12 Replace all panels except the front panel in their correct positions Move the control switch to the ICE position then plug the unit back in Move the power switch to the ON position then replace the front panel in its correct po...

Page 55: ...ont panel in its correct position 13 Allow the water system to drain for 5 minutes 14 Remove the front panel Move the control switch to the ICE position then replace the front panel in its correct position 15 Allow the icemaker to run for about 30 minutes then remove the front panel Move the power switch to the OFF position then unplug the unit from the electrical outlet 16 Pour warm water into th...

Page 56: ...pan This solution will flow down to the gear motor drain pan and out the drain line to sanitize these areas Repeat with a cup of clean water to rinse Icemaker and Dispenser Unit Storage Bin Drains Check to make sure they are clear Yearly Inlet Water Valve and Drain Valve Close the water supply line shut off valve and drain the water system Clean the inlet water valve screen and clean and inspect t...

Page 57: ...er line out using the compressed air or carbon dioxide supply 8 Close the icemaker water supply line drain valve 2 Drain the evaporator 1 Move the power switch to the OFF position Move the control switch to the DRAIN position then move the power switch back to the ON position Replace the front panel in its correct position 2 Allow the water system to drain for 5 minutes 3 Remove the front panel th...

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