Hoshizaki KM-1301SAH-E, KM-1301SRH-E Diagnostic Charts, No Ice Production Possible Cause

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G. Diagnostic Charts

Before consulting the diagnostic charts, check for correct installation, proper voltage per unit nameplate, and adequate water supply. Check CB using the steps in "IV.B. Control Board Check." Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, & 10 and S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings."

1. No Ice Production

No Ice Production - Possible Cause

	1. Power Supply	a) Off, blown fuse, or tripped breaker.
		b) Not within specifications.

	2. Main Transformer (230V/115V)	a) Coil winding open or shorted.

	3. Water Supply	a) Water supply off or improper water pressure.

		b) External water filters clogged.
	4. Thermostatic Bin Control.	a) Tripped with bin filled with ice.
	See "IV.C.1. Thermostatic Bin
	See "IV.C.1. Thermostatic Bin	b) Ambient temperature too cool.
	Control Check."	b) Ambient temperature too cool.

		c) Set too warm.
		c) Set too warm.

		d) Bulb out of position.
		e) Bad contacts.

	5. Fuse (Control Box)	a) Blown.

	6. Control Switch	a) Bad contacts.

	7. High-Pressure Switch	a) Bad contacts.
		b) Dirty air filter or condenser.

		c) Ambient or condenser water temperature too warm.

		d) Refrigerant overcharged.

		e) Fan not operating (air-cooled and remote air-cooled models).
		f) Refrigerant lines or components plugged.
		g) Condenser water pressure too low or off (water‑cooled model).

		h) Headmaster (C.P.R.) open (remote condenser unit).

	8. Control Transformer	a) Coil winding open or shorted.
	(115V/10.5V)

	9. Control Board	a) In alarm.
	See "IV.B. Control Board Check."	b) Defective.

	10. Mechanical Bin Control	a) Tripped with bin filled with ice.
	See "IV.C.2. Mechanical Bin
	See "IV.C.2. Mechanical Bin	b) Actuator does not move freely.
	Control Check and Cleaning."	b) Actuator does not move freely.

		c) Defective.
		c) Defective.
	11. Thermistor	a) Leads shorted or open.
	See "IV.E. Thermistor Check."

	12. Hot Gas Valve	a) Open in freeze cycle.

		b) Closed in harvest cycle.

	13. Inlet Water Valve	a) Mesh filter or orifice clogged.
		b) Coil winding open.

		c) Open in freeze cycle.

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Contents Superior Degree Reliability Hoshizaki AMERICA, INC Contents Page Indicates important information about the use and care Important Safety InformationSerious injury 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 Minute Fill Cycle Sequence of OperationSequence Cycles and Shutdown Initial Harvest CyclePump-Out Cycle S4 Dip Switch Setting Pump-Out 1st Pump-Out FrequencyFreeze Cycle Harvest CycleMechanical Bin Control KM-1301SWH-E, KM-1301SRH-E Cycle at Shutdown Mechanical Bin Control ActivationPump-Out Cycle Sequence Flow ChartCycle Steps Minute Fill Harvest Cycle Mechanical BC Bin Full Shutdown and RestartControl Board Control Board Layout Control BoardSequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Every 3 sec Time LEDs are OnDefault 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 Freeze Timer S4 dip switch 9 Harvest Pump Timer S4 dip switchFactory Use S4 dip switch S4 Dip Switch Setting Pump Motor Time secondsFloat Switch Control S5 dip switch Control SwitchRefill Counter S5 dip switch 2 through Tank Water Tank Headmaster Service Drier Valve Thermistor KM-1301SAH-E air-cooled Wiring DiagramsAuxiliary Code T-0, U-0 U-0 Auxiliary CodeAuxiliary Code U-1 and Later PressureSwitch KM-1301SRH-E remote air-cooled Performance Data 1780 13301240 13351950 12701142 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 Thermostatic Bin Control Check KM-1301SAH-E Bin Control CheckMechanical Bin Control Check Single Unit Connection Detail Stacked Unit Connection DetailMechanical Bin Control Cleaning Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Adjustment of Water Regulating Valve water-cooled model Thermistor CheckNo Ice Production Diagnostic ChartsNo 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 Possible Cause Long Harvest Cycle Low Ice ProductionLong Freeze Cycle Service for Refrigerant Lines Replacement of ComponentsRefrigerant 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