Manuals / Hoshizaki / Kitchen Appliance / Ice Maker

Hoshizaki KM-1301SAH/3 III. Technical Information, A. Water Circuit and Refrigeration Circuit

Models: KM-1301SWH/3 KM-1301SRH/3 KM-1301SAH/3

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III. Technical Information

III. Technical Information

A. Water Circuit and Refrigeration Circuit

1. KM-1301SAH, KM-1301SAH3 (air-cooled)

					High Pressure		Hot Gas Valve			Check	Valves
					High Pressure	Switch	Hot Gas Valve			Strainer
			Drier								Service Valve
		ValveWaterInlet Tubes Condenser	Drier	Thermistor	LiquidLine		ExchangerHeat	Suction Line			Service Valve
SupplyWater			ValveCleaning					Suction Line			SwitchFloatValveCheck
SupplyWater			ValveCleaning			Valve			Service Valve		SwitchFloatValveCheck
			Fan
		Spray	Evaporator
		Spray	Evaporator

Spray Tubes

Discharge Line Compressor

Expansion Valves

Water Pump

Drain

Tank

Water

Freeze/Harvest Pump-Out Pump Timer

Refrigeration Circuit

Water Circuit

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Hoshizaki KM-1301SAH/3, KM-1301SRH/3 III. Technical Information, A. Water Circuit and Refrigeration Circuit, Tank

Contents

KM-1301SWH/3 KM-1301SRH/3 SERVICE MANUAL Stackable Crescent Cuber Models KM-1301SAH/3HoshizakiHoshizaki America, Inc Peachtree City, GA •Complete and detailed explanation of the problemHOSHIZAKI AMERICA, INC 618 Highway 74 South Attn: Hoshizaki Technical Support DepartmentCONTENTS g Freeze Timer S4 dip switch 9 & e Harvest Pump Timer S4 dip switchf Factory Use S4 dip switch h Float Switch Control S5 dip switch1. Refrigerant Recovery V. Removal and Replacement of ComponentsA. Service for Refrigerant Lines B. Removal and Replacement of CompressorImportant Safety Information I. Specifications A. Icemaker 1. KM-1301SAH air-cooled2. KM-1301SAH3 air-cooled 3. KM-1301SWH water-cooled 4. KM-1301SWH3 water-cooled 5. KM-1301SRHremote air-cooled 6. KM-1301SRH3remote air-cooled B. Condenser Unit 1. URC-14FUnit: inches mm SPECIFICATIONS MODEL URC-14FII. General Information A.Construction 1. KM-1301SAH, KM-1301SAH3 air-cooled2. KM-1301SWH, KM-1301SWH3 water-cooled 3. KM-1301SRH, KM-1301SRH3remote air-cooled a1-MinuteFill Cycle B. Sequence of Operation1. Sequence Cycles and Shutdown bInitial Harvest CycledPump-OutCycle eHarvest CyclefShutdown KM-1301SAH/3, KM-1301SWH/3,and KM-1301SRH/3 G Control Board Sequence Flow ChartTimer Harvest PumpC. Control Board Control Board G Control Board1. Control Board Layout Part Number 2A3792-01dLow Water Safety bHarvest Backup Timer and Freeze TimercHigh Temperature Safety aMaximum Water Supply Period - 6 minutesf LED Lights and Audible Alarm Safeties 3. Controls and Adjustments aDefault Dip Switch SettingsbHarvest Timer S4 dip switch c Pump-OutTimer S4 dip switch 3 & dPump-OutFrequency Control S4 dip switch 5 &e Harvest Pump Timer S4 dip switch f Factory Use S4 dip switchg Freeze Timer S4 dip switch 9 & h Float Switch Control S5 dip switch i Refill Counter S5 dip switch 2 throughD. Bin Control E. Float SwitchG. Control Switch F. ThermistorIII. Technical Information A. Water Circuit and Refrigeration CircuitTank KM-1301SWH, KM-1301SWH3 water-cooled Water TankSpray Tubes Water Tanka KM-1301SAH air-cooled B. Wiring Diagrams1.Auxiliary Code T-0, U-0 Transformer Output 10.5V atAuxiliary Code T-0, U-0bKM 1301SWH water-cooledTransformer Output 10.5V at 412±21 Auxiliary Code T-0, U-0cKMCut-out PSIG1301SWH3 waterKM-1301SAH3 air-cooledand KM cooledTransformer Output Auxiliary Code T-0, U-0KM-1301SRH3remote air-cooled 10.5V atTransformer Output Code U-1and LaterAuxiliary 10.5V atb KM-1301SWH water-cooled Auxiliary CodeU-1and Later 10.5V at10.5V at Auxiliary Code U-1and Laterc KM-1301SRHremote air-cooled Transformer OutputCut-out Air-CooledModelWater-CooledModel 412±21 PSIGTransformer Output 1301SRH3 remote air-coolede KM 10.5V atC. Performance Data APPROXIMATE ICE APPROXIMATE ICE APPROXIMATE ICE APPROXIMATE ICE APPROXIMATE ICE IV. Service Diagnosis A.Diagnostic Procedure31-MinuteFill Cycle – LED 4 is on. WV and X2 relay auxiliary code T-0,U‑0 5Freeze 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. The unit is held in freeze by a 5-minuteshort cycle protection timer CB will not accept a signal from F/S. After the 5-minuteshort cycle protection timer expires, CB turns freeze termination over to F/S. During the first 5 minutes of freeze, confirm that the evaporator temperature drops. After 8Shutdown B. Control Board Check D.Float Switch Check and Cleaning 1. Float Switch CheckC. Bin Control Check 2.Float Switch Cleaning Fig.E.Thermistor Check F. Diagnostic Charts 1. No Ice Production1 The icemaker will not 3 Compressor will 2. Evaporator is Frozen Up 1Freeze cycle time is 3. Low Ice Production 4. Abnormal Ice 5. Other V. Removal and Replacement of Components A.Service for Refrigerant Lines1.Refrigerant Recovery 2. Brazing 3.Evacuation and Recharge R-404AB.Removal and Replacement of Compressor C.Removal and Replacement of Expansion Valve 11Place the expansion valve cover in position E. Removal and Replacement of Evaporator F. Removal and Replacement of Air-CooledCondenser 1Turn off the power supply 2Remove the panels 1Turn off the power supply water‑cooled model Regulator - C.P.R. remote air-cooledmodel L.Removal and Replacement of Thermistor Fig.N.Removal and Replacement of Inlet Water Valve remote air‑cooled modelsO. Removal and Replacement of Pump Motor Fig.P. Removal and Replacement of Control Board VI. Cleaning and Maintenance A. Cleaning and Sanitizing Instructions1.Cleaning Procedure 18Replace the front panel in its correct position 1. Stainless Steel Exterior B. Maintenance InstructionsC. Preparing the Icemaker for Long Storage 2.Storage Bin and ScoopFig. 3.Drain the water tank