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Hoshizaki KM-320MWH service manual II. General Information A.Construction, 1.KM-320MAH air-cooled

Models: KM-320MWH KM-320MAH

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II. General Information

II. General Information

A.Construction

1.KM-320MAH (air-cooled)

Evaporator

Cleaning Valve

Bin Control

Thermostat

Float Switch

Water Pump

Compressor

Spray Tubes	Expansion Valve
	Expansion Valve
	Control Switch

Water Supply Inlet

Hot Gas Valve

Condenser

Fan Motor

Drier

Control Box

(shown transparent to allow view of other components)

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Hoshizaki KM-320MWH service manual II. General Information A.Construction, 1.KM-320MAH air-cooled

Contents

HoshizakiHoshizaki America, Inc Number Issued Revised“A Superior Degree of Reliability” Modular Crescent Cuber Models KM-320MAH KM-320MWHPage CONTENTS B. Cleaning and Sanitizing Instructions K. Removal and Replacement of Pump MotorL. Removal and Replacement of Spray Tubes VI. Cleaning and Maintenance InstructionsI. Specifications A. KM-320MAH air-cooled B. KM-320MWH water-cooled 1.KM-320MAH air-cooled II. General Information A.Construction2. KM-320MWH water-cooled 1.Solid-StateControl Features of Control Products E Controller Boardb Defrost Timer B. Controller Boarde High Voltage Cut-out c High Temperature Safety - 127 ± 7F 53 ± 4Cd Low Water Safety f LED Lights and Audible Alarm SafetiesDefrost Backup Timer factory settingType of Alarm Check for defrost problem stuck HGVControl Products HOS-001ABoard Hot Gas Valve 3.Sequence 1st CycleWater Valve Water ValveDrain Pump Hot Gas Valve Defrost Cycle Freeze 2nd Cycle and after with pump drainCycle Pump, Fan & Line Valve Water Valve Hot Gas Valve Defrost Cycle Freeze 2nd Cycle and after with no pump drainCycle Pump, Fan & Line Valve 4. Controls and Adjustments a Defrost Control bDefrost Timerd Drain Counter c Drain Timerf Bin Control e Freeze Timer5. Checking the Controller Board 3Reconnect the float switch connector to the controller board. After the first 5 minutes of the freeze cycle, disconnect the float switch leads from the controller board. At this point, the unit should start the defrost cycle A. Water Circuit and Refrigerant Circuit III. Technical Information1. KM-320MAH 2. KM-320MWH 1. KM-320MAH, KM-320MWH B. Wiring DiagramC. Timing Chart Page 1. KM-320MAH D. Performance DataAPPROXIMATE ICE 2. KM-320MWHRemedy IV. Service Diagnosis A. No Ice ProductionProblem Possible Causej Water Supply Line ProblemPossible Cause Remedyc Overload Protector ProblemPossible Cause RemedyPossible Cause B. Evaporator is Frozen UpProblem Problemc Controller Board ProblemPossible Cause RemedyProblem C. Low Ice ProductionD. Abnormal Ice E. Other2.Evacuation and Recharge R-404A V. Removal and Replacement of ComponentsA.Service for Refrigerant Lines 1. Refrigerant RecoveryB.Brazing DANGER C. Removal and Replacement of Compressor E.Removal and Replacement of Expansion Valve D. Removal and Replacement of Drier7Install a new drier G.Removal and Replacement of Evaporator H. Removal and Replacement of Thermistor J.Removal and Replacement of Water Valve I. Removal and Replacement of Fan MotorL.Removal and Replacement of Spray Tubes K. Removal and Replacement of Pump MotorWater‑Cooled Model Only Page A. Preparing the Icemaker for Long Storage VI. Cleaning and Maintenance InstructionsPage B. Cleaning and Sanitizing Instructions 1.Cleaning Procedure 15Move the control switch to the ICE position 3Condenser except water-cooledmodel C. Maintenance1Stainless Steel Exterior 2Storage Bin and Scoop