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Hoshizaki
KM-320MWH service manual “A Superior Degree of Reliability”, Number Issued Revised
Models:
KM-320MWH
KM-320MAH
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50 pages
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Specs
Install
B. Wiring Diagram
K. Removal and Replacement of Pump Motor
Maintenance
Number Issued Revised
The voltage safety automatically resets
Cleaning Procedure
b Defrost Timer
f LED Lights and Audible Alarm Safeties
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Hoshizaki
Hoshizaki America, Inc.
Modular Crescent Cuber
Models
KM-320MAH
KM-320MWH
“A Superior Degree
of Reliability”
www.hoshizaki.com
SERVICE MANUAL
Number: 73132
Issued:
1-24-2006
Revised:
11-30-2006
Page 2
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Contents
“A Superior Degree of Reliability”
Number Issued Revised
Modular Crescent Cuber Models KM-320MAH KM-320MWH
HoshizakiHoshizaki America, Inc
Page
CONTENTS
L. Removal and Replacement of Spray Tubes
K. Removal and Replacement of Pump Motor
VI. Cleaning and Maintenance Instructions
B. Cleaning and Sanitizing Instructions
I. Specifications A. KM-320MAH air-cooled
B. KM-320MWH water-cooled
1.KM-320MAH air-cooled
II. General Information A.Construction
2. KM-320MWH water-cooled
b Defrost Timer
Features of Control Products E Controller Board
B. Controller Board
1.Solid-StateControl
d Low Water Safety
c High Temperature Safety - 127 ± 7F 53 ± 4C
f LED Lights and Audible Alarm Safeties
e High Voltage Cut-out
Type of Alarm
factory setting
Check for defrost problem stuck HGV
temperature 127F
Control Products HOS-001ABoard
Water Valve
3.Sequence 1st Cycle
Water Valve
Hot Gas Valve
Drain Pump Hot Gas Valve Defrost Cycle Freeze
2nd Cycle and after with pump drain
Cycle Pump, Fan & Line Valve
Water Valve Hot Gas Valve Defrost Cycle Freeze
2nd Cycle and after with no pump drain
Cycle Pump, Fan & Line Valve
4. Controls and Adjustments
a Defrost Control
bDefrost Timer
d Drain Counter
c Drain Timer
f Bin Control
e Freeze Timer
5. 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 Information
1. KM-320MAH
2. KM-320MWH
1. KM-320MAH, KM-320MWH
B. Wiring Diagram
C. Timing Chart
Page
1. KM-320MAH
D. Performance Data
APPROXIMATE ICE
2. KM-320MWH
Problem
IV. Service Diagnosis A. No Ice Production
Possible Cause
Remedy
Possible Cause
Problem
Remedy
j Water Supply Line
Possible Cause
Problem
Remedy
c Overload Protector
Problem
B. Evaporator is Frozen Up
Problem
Possible Cause
Possible Cause
Problem
Remedy
c Controller Board
D. Abnormal Ice
C. Low Ice Production
E. Other
Problem
A.Service for Refrigerant Lines
V. Removal and Replacement of Components
1. Refrigerant Recovery
2.Evacuation and Recharge R-404A
B.Brazing DANGER
C. Removal and Replacement of Compressor
E.Removal and Replacement of Expansion Valve
D. Removal and Replacement of Drier
7Install 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 Motor
L.Removal and Replacement of Spray Tubes
K. Removal and Replacement of Pump Motor
Water‑Cooled Model Only
Page
A. Preparing the Icemaker for Long Storage
VI. Cleaning and Maintenance Instructions
Page
B. Cleaning and Sanitizing Instructions
1.Cleaning Procedure
15Move the control switch to the ICE position
1Stainless Steel Exterior
C. Maintenance
2Storage Bin and Scoop
3Condenser except water-cooledmodel
