Hoshizaki KM-1301SRH-E, KM-1301SAH-E, KM-1301SWH-E service manual Contents

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IMPORTANT
This manual should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualified service technicians
should install, service, and maintain the icemaker. Read the warnings contained
in this booklet carefully as they give important information regarding safety.
Please retain this booklet for any further reference that may be necessary.
CONTENTS
Important Safety Information	5
I. Specifications	6
A. Icemaker	6
1. KM-1301SAH-E (air-cooled)	6
2. KM-1301SWH-E (water-cooled)	7
3. KM-1301SRH-E (remote air-cooled)	8
B. Condenser Unit	9
II. General Information	11
A. Construction	11
1. KM-1301SAH-E (air-cooled)	11
2. KM-1301SWH-E (water-cooled)	12
3. KM-1301SRH-E (remote air-cooled)	13
B. Sequence of Operation	14
1. Sequence Cycles and Shutdown	14
a) 1-Minute Fill Cycle	14
b) Initial Harvest Cycle	14
c) Freeze Cycle	15
d) Pump-Out Cycle	15
e) Harvest Cycle	15
f) Shutdown	15
2. Sequence Flow Chart	17
C. Control Board	18
1. Control Board Layout	19
a) LED Lights and Audible Alarm Safeties	20
2. Controls and Adjustments	21
a) Default Dip Switch Settings	21
b) Harvest Timer (S4 dip switch 1 & 2)	21
c) Pump-Out Timer (S4 dip switch 3 & 4)	22
d) Pump-Out Frequency Control (S4 dip switch 5 & 6)	22
e) Harvest Pump Timer (S4 dip switch 7)	23
f) Factory Use (S4 dip switch 8)	23
g) Freeze Timer (S4 dip switch 9 & 10)	23
h) Float Switch Control (S5 dip switch 1)	24
i) Refill Counter (S5 dip switch 2 through 5)	24
D. Control Switch	24

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Contents Superior Degree Reliability Hoshizaki AMERICA, INC Contents Page Unit Important Safety InformationSerious injury Indicates important information about the use and careKM-1301SAH-E air-cooled Specifications IcemakerKM-1301SWH-E water-cooled KM-1301SRH-E remote air-cooled URC-14FE Condenser UnitSpecifications II. General Information Construction KM-1301SWH-E water-cooled Separators Initial Harvest Cycle Sequence of OperationSequence Cycles and Shutdown Minute Fill CycleHarvest Cycle S4 Dip Switch Setting Pump-Out 1st Pump-Out FrequencyFreeze Cycle Pump-Out CycleCycle at Shutdown Mechanical Bin Control Activation Mechanical Bin Control KM-1301SWH-E, KM-1301SRH-EMechanical BC Bin Full Shutdown and Restart Sequence Flow ChartCycle Steps Minute Fill Harvest Cycle Pump-Out CycleControl Board Control Board Control Board LayoutTime LEDs are On LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Every 3 sec Sequence StepControls 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 S4 Dip Switch Setting Pump Motor Time seconds Harvest Pump Timer S4 dip switchFactory Use S4 dip switch Freeze Timer S4 dip switch 9Control Switch Float Switch Control S5 dip switchRefill Counter S5 dip switch 2 through Tank Water Tank Headmaster Service Drier Valve Thermistor U-0 Auxiliary Code Wiring DiagramsAuxiliary Code T-0, U-0 KM-1301SAH-E air-cooledAuxiliary Code U-1 and Later PressureSwitch KM-1301SRH-E remote air-cooled Performance Data 1335 13301240 17802070 12701142 1950Diagnostic 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-EControl Board Check Bin Control Check Thermostatic Bin Control Check KM-1301SAH-EMechanical Bin Control Check Stacked Unit Connection Detail Single Unit Connection DetailMechanical Bin Control Cleaning Float Switch Check Float Switch Check and CleaningFloat Switch Cleaning Thermistor Check Adjustment of Water Regulating Valve water-cooled modelDiagnostic Charts No Ice ProductionNo Ice Production Possible Cause No Ice Production Possible Cause Freeze Up Possible Cause Harvest Cycle Freeze UpFreeze 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 Evacuation and Recharge R-404A BrazingPage Component Important Notes for Component ReplacementCleaning Procedure VI. Cleaning and MaintenanceIce Chute Float Switch Assembly Drain Plug Sanitizing Procedure Following Cleaning Procedure Remove the water from the icemaker water supply line MaintenanceDrain the water tank