Table Of Contents - Hoshizaki KM-230BAJ Service Manual

This manual should be read carefully before the appliance is serviced. Read the
warnings and guidelines contained in this manual carefully as they provide essential
information for the continued safe use, service, and maintenance of the appliance.
Retain this manual for any further reference that may be necessary.
Important Safety Information ..........................................................................................4
I. Construction and Water/Refrigeration Circuit Diagram ...............................................6
A. Construction ...........................................................................................................6
1. KM-230BAJ, KM-300BAJ .................................................................................6
2. KM-300BWJ .....................................................................................................7
3. Icemaking Compartment ..................................................................................8
B. Water/Refrigeration Circuit Diagram ......................................................................9
1. KM-230BAJ ......................................................................................................9
2. KM-300BAJ ....................................................................................................10
3. KM-300BWJ ................................................................................................... 11
II. Sequence of Operation and Service Diagnosis ........................................................12
A. Sequence of Operation ........................................................................................12
1. Flow Chart ......................................................................................................12
2. Timing Chart ...................................................................................................13
3. Details ............................................................................................................14
B. Service Diagnosis ................................................................................................16
C. Control Board Check ...........................................................................................18
D. Bin Control Check and Cleaning .........................................................................18
1. Bin Control Check ..........................................................................................19
2. Bin Control Cleaning ......................................................................................19
E. Float Switch Check and Cleaning ........................................................................21
1. Float Switch Check.........................................................................................21
2. Float Switch Cleaning ....................................................................................22
F. Thermistor Check .................................................................................................23
G. Diagnostic Tables ................................................................................................24
1. No Ice Production ...........................................................................................24
2. Freeze-Up ......................................................................................................27
3. Low Ice Production .........................................................................................28
4. Abnormal Ice ..................................................................................................28
5. Other ..............................................................................................................29
III. Controls and Adjustments........................................................................................30
A. Control Board Layout ...........................................................................................31
B. LED Lights and Audible Alarm Safeties ...............................................................32
C. Settings and Adjustments ....................................................................................33
1. Default Dip Switch Settings ............................................................................33
2. Harvest Timer .................................................................................................33
3. Pump-Out Timer .............................................................................................34
4. Pump-Out Frequency Control ........................................................................34
IMPORTANT
CONTENTS
2