Freeze Up Possible Cause Freeze Cycle | Hoshizaki KM-1301SAH-E

Freeze Up - Possible Cause

		Freeze Cycle
	1. Evaporator	a) Scaled up.

		b) Damaged.

	2. Separators	a) Out of position.

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

	4. Refrigerant charge.	a) Low.

	5. Check Valve	a) Defective.

	6. Control Board	a) Freeze timer set incorrectly.
	See "IV.B. Control Board Check."	b) Defective.

	7. Inlet Water Valve	a) Leaking by.

	8. Float Switch	a) Float does not move freely.
	See "IV.D. Float Switch Check
	See "IV.D. Float Switch Check	b) Defective.
	and Cleaning."	b) Defective.
	and Cleaning."

	9. Pump Motor	a) RPM too slow.
	10. Expansion Valve (TXV)	a) Defective.

	11. Headmaster (C.P.R.) (remote	a) Defective.
	condenser unit)

	12. Water Regulating Valve	a) Out of adjustment.
	(water‑cooled model)
	See "IV.F. Adjustment of Water
	Regulating Valve."

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

Contents

Superior Degree Reliability Hoshizaki AMERICA, INC Contents Page Serious injury Important Safety InformationIndicates important information about the use and care Unit KM-1301SAH-E air-cooled Specifications Icemaker KM-1301SWH-E water-cooled KM-1301SRH-E remote air-cooled URC-14FE Condenser Unit Specifications II. General Information Construction KM-1301SWH-E water-cooled Separators Sequence Cycles and Shutdown Sequence of OperationMinute Fill Cycle Initial Harvest Cycle Freeze Cycle S4 Dip Switch Setting Pump-Out 1st Pump-Out FrequencyPump-Out Cycle Harvest Cycle Cycle at Shutdown Mechanical Bin Control Activation Mechanical Bin Control KM-1301SWH-E, KM-1301SRH-E Cycle Steps Minute Fill Harvest Cycle Sequence Flow ChartPump-Out Cycle Mechanical BC Bin Full Shutdown and Restart Control Board Control Board Control Board Layout No. of Beeps Type of Alarm Every 3 sec LED Lights and Audible Alarm SafetiesSequence Step Time LEDs are On Default Dip Switch Settings Controls and AdjustmentsHarvest Timer S4 dip switch 1 Pump-Out Frequency Control S4 dip switch 5 Pump-Out Timer S4 dip switch 3Time seconds Inlet Factory Use S4 dip switch Harvest Pump Timer S4 dip switchFreeze Timer S4 dip switch 9 S4 Dip Switch Setting Pump Motor Time seconds Float Switch Control S5 dip switch Control SwitchRefill Counter S5 dip switch 2 through Tank Water Tank Headmaster Service Drier Valve Thermistor Auxiliary Code T-0, U-0 Wiring DiagramsKM-1301SAH-E air-cooled U-0 Auxiliary Code Auxiliary Code U-1 and Later PressureSwitch KM-1301SRH-E remote air-cooled Performance Data 1240 13301780 1335 1142 12701950 2070 Diagnostic Procedure IV. Service DiagnosisPage S4 Dip Switch Setting Pump-Out 1st Pump-Out Frequency Mechanical Bin Control KM-1301SWH-E, KM-1301SRH-E Shutdown Thermostatic Bin Control KM-1301SAH-E Control Board Check Thermostatic Bin Control Check KM-1301SAH-E Bin Control CheckMechanical Bin Control Check Stacked Unit Connection Detail Single Unit Connection Detail Mechanical Bin Control Cleaning Float Switch Check Float Switch Check and Cleaning Float Switch Cleaning Thermistor Check Adjustment of Water Regulating Valve water-cooled model No Ice Production Diagnostic ChartsNo Ice Production Possible Cause No Ice Production Possible Cause Freeze Up Possible Cause Harvest Cycle Freeze Up Freeze Up Possible Cause Freeze Cycle Low Ice Production Possible Cause Long Harvest Cycle Low Ice ProductionLong Freeze Cycle Service for Refrigerant Lines Replacement of ComponentsRefrigerant Recovery Evacuation and Recharge R-404A BrazingPage Component Important Notes for Component Replacement Cleaning Procedure VI. Cleaning and Maintenance Ice Chute Float Switch Assembly Drain Plug Sanitizing Procedure Following Cleaning Procedure Remove the water from the icemaker water supply line Maintenance Drain the water tank