Table Of Contents - Hoshizaki KM-301BAJ 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 ................................................................................................. 5
I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 7
A. Construction .................................................................................................................. 7
1. Air-Cooled Models (BAJ) .......................................................................................... 7
2. Water-Cooled Models (BWJ) ................................................................................... 8
3. Icemaking Compartment ......................................................................................... 9
B. Water/Refrigeration Circuit Diagram ............................................................................ 10
1. Air-Cooled Models (BAJ) ........................................................................................ 10
2. Water-Cooled Models (BWJ) ..................................................................................11
II. Sequence of Operation and Service Diagnosis ............................................................... 12
A. Sequence of Operation Flow Chart ............................................................................. 12
1. Operation Flow Chart ............................................................................................ 12
2. Shutdown Flow Chart ............................................................................................ 13
B. Service Diagnosis ....................................................................................................... 14
C. Control Board Check ................................................................................................... 20
D. Bin Control Check ....................................................................................................... 21
E. Float Switch Check and Cleaning ............................................................................... 23
F. Thermistor Check ......................................................................................................... 25
G. Switches ..................................................................................................................... 26
H. Diagnostic Tables ........................................................................................................ 27
I. Freeze-Up Check List ................................................................................................... 31
III. Controls and Adjustments ............................................................................................... 32
A. Control Board Layout .................................................................................................. 33
B. LED Lights and Audible Alarm Safeties ....................................................................... 34
C. Settings and Adjustments ............................................................................................ 35
1. Default Dip Switch Settings .................................................................................... 35
2. Harvest Time (S1 dip switch 1 & 2)........................................................................ 36
3. Pump-Out Time/Harvest Time During Pump-Out (S1 dip switch 3 & 4) ................. 36
4. Pump-Out Frequency Control (S1 dip switch 5 & 6) .............................................. 37
5. Harvest Pump Time Duration (Harvest Assist) (S1 dip switch 7 & 8) ..................... 37
6. Freeze Timer (S1 dip switch 9 & 10) ...................................................................... 38
7. Pump-Out/Drain Selector (S2 dip switch 1) ............................................................ 38
8. Harvest Promotion Control (S2 dip switch 2) ......................................................... 38
9. Minimum Harvest Time (S2 dip switch 3) .............................................................. 39
10. Harvest Completion Detection Control (S2 dip switch 4) ..................................... 39
11. Overfreeze Detection Control (S2 dip switch 5) .................................................... 40
12. Slush Control (S2 dip switch 6) ............................................................................ 41
IV. Refrigeration Circuit and Component Service Information.............................................. 42
A. Refrigeration Circuit Service Information .................................................................... 42
B. Component Service Information .................................................................................. 45
C. Water Regulating Valve Adjustment (water-cooled model) .......................................... 45
IMPORTANT
CONTENTS
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