Hoshizaki KM-1301SRH-E, KM-1301SAH-E, KM-1301SWH-E Freeze Up Possible Cause Harvest Cycle

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2. Freeze Up

Defrost and clean the unit prior to diagnosing freeze up. See "VI.A. Cleaning and Sanitizing Instructions."

Freeze Up - Possible Cause

		Harvest Cycle

	1. Evaporator	a) Scaled up.

		b) Damaged.

	2. Separators	a) Out of position.
	3. Cube Guide	a) Out of position.

	4. Spray Tubes and/or Spray	a) Dirty.
	Guides
	Guides	b) Out of position.
		b) Out of position.

	5. Refrigerant Charge	a) Low.
	6. Ambient Temperature	a) Too cool.

	7. Water Supply	a) Low water pressure.

		b) External water filters clogged.

		c) Insufficient water line size.
		Minimum 3/8" nominal ID (10 mm nominal OD)
	8. Thermostatic Bin Control	a) Extension bracket not installed.
	See "IV.C.1. Thermostatic Bin
	See "IV.C.1. Thermostatic Bin	b) Bulb out of position.
	Control Check."	b) Bulb out of position.

		c) Bad contacts.
		c) Bad contacts.

	9. Control Board	a) Harvest timer set too short.
	See "IV.B. Control Board Check."	b) Defective.

	10. Mechanical Bin Control	a) Actuator does not move freely.
	See "IV.C.2. Mechanical Bin
	Control Check and Cleaning."

	11. Thermistor	a) Loose, disconnected, or defective.
	See "IV.E. Thermistor Check."

	12. Hot Gas Valve	a) Closed.
	13. Inlet Water Valve	a) Water valve screen clogged.
	14. Liquid Line Valve (if applicable)	a) Open.

	15. Expansion Valve (TXV)	a) Defective.

	16. Water Regulating Valve	a) Leaking by.
	(water-cooled model)

		b) Defective.

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Contents

Superior Degree Reliability Hoshizaki AMERICA, INC Contents Page Important Safety Information Serious injuryIndicates important information about the use and care UnitSpecifications Icemaker KM-1301SAH-E air-cooledKM-1301SWH-E water-cooled KM-1301SRH-E remote air-cooled Condenser Unit URC-14FESpecifications II. General Information Construction KM-1301SWH-E water-cooled Separators Sequence of Operation Sequence Cycles and ShutdownMinute Fill Cycle Initial Harvest CycleS4 Dip Switch Setting Pump-Out 1st Pump-Out Frequency Freeze CyclePump-Out Cycle Harvest CycleMechanical Bin Control KM-1301SWH-E, KM-1301SRH-E Cycle at Shutdown Mechanical Bin Control ActivationSequence Flow Chart Cycle Steps Minute Fill Harvest CyclePump-Out Cycle Mechanical BC Bin Full Shutdown and RestartControl Board Control Board Layout Control BoardLED Lights and Audible Alarm Safeties No. of Beeps Type of Alarm Every 3 secSequence Step Time LEDs are OnControls and Adjustments Default Dip Switch SettingsHarvest Timer S4 dip switch 1 Pump-Out Timer S4 dip switch 3 Pump-Out Frequency Control S4 dip switch 5Time seconds Inlet Harvest Pump Timer S4 dip switch Factory Use S4 dip switchFreeze Timer S4 dip switch 9 S4 Dip Switch Setting Pump Motor Time secondsControl Switch Float Switch Control S5 dip switchRefill Counter S5 dip switch 2 through Tank Water Tank Headmaster Service Drier Valve Thermistor Wiring Diagrams Auxiliary Code T-0, U-0KM-1301SAH-E air-cooled U-0 Auxiliary CodeAuxiliary Code U-1 and Later PressureSwitch KM-1301SRH-E remote air-cooled Performance Data 1330 12401780 13351270 11421950 2070IV. Service Diagnosis Diagnostic ProcedurePage S4 Dip Switch Setting Pump-Out 1st Pump-Out Frequency Shutdown Thermostatic Bin Control KM-1301SAH-E Mechanical Bin Control KM-1301SWH-E, KM-1301SRH-EControl Board Check Bin Control Check Thermostatic Bin Control Check KM-1301SAH-EMechanical Bin Control Check Single Unit Connection Detail Stacked Unit Connection DetailMechanical Bin Control Cleaning Float Switch Check and Cleaning Float Switch Check Float Switch Cleaning Adjustment of Water Regulating Valve water-cooled model Thermistor CheckDiagnostic Charts No Ice ProductionNo Ice Production Possible Cause No Ice Production Possible Cause Freeze Up Freeze Up Possible Cause Harvest CycleFreeze Up Possible Cause Freeze Cycle Low Ice Production Low Ice Production Possible Cause Long Harvest CycleLong Freeze Cycle Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Brazing Evacuation and Recharge R-404APage Important Notes for Component Replacement ComponentVI. Cleaning and Maintenance Cleaning ProcedureIce Chute Float Switch Assembly Drain Plug Sanitizing Procedure Following Cleaning Procedure Maintenance Remove the water from the icemaker water supply lineDrain the water tank