Table Of Contents - Hoshizaki KM-350MWJ 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 (MAJ) ......................................................................................... 7
2. Water-Cooled Models (MWJ) ................................................................................... 8
3. Remote Models (MRJ) ............................................................................................. 9
B. Water/Refrigeration Circuit Diagram ............................................................................ 10
1. Air-Cooled Models (MAJ) ....................................................................................... 10
2. Water-Cooled Models (MWJ) ..................................................................................11
3. Remote Models (MRJ) ........................................................................................... 12
II. Sequence of Operation and Service Diagnosis ............................................................... 13
A. Sequence of Operation Flow Chart ............................................................................. 13
1. Operation Flow Chart ............................................................................................ 13
2. Shutdown Flow Chart ............................................................................................ 14
B. Service Diagnosis ....................................................................................................... 15
C. Control Board Check ................................................................................................... 21
D. Bin Control Check and Adjustment .............................................................................. 22
E. Float Switch Check and Cleaning ............................................................................... 26
F. Thermistor Check ......................................................................................................... 28
G. Control Switch ............................................................................................................. 28
H. Mode Switch ............................................................................................................... 28
I. Diagnostic Tables .......................................................................................................... 29
J. Freeze-Up Check List .................................................................................................. 33
III. Controls and Adjustments ............................................................................................... 34
A. Control Board Layout .................................................................................................. 35
B. LED Lights and Audible Alarm Safeties ....................................................................... 36
C. Settings and Adjustments ............................................................................................ 37
1. Default Dip Switch Settings .................................................................................... 37
2. Harvest Time (S4 dip switch 1 & 2)........................................................................ 38
3. Pump-Out Time/Harvest Time During Pump-Out (S4 dip switch 3 & 4) ................. 38
4. Pump-Out Frequency Control (S4 dip switch 5) ..................................................... 39
5. Harvest Pump Time (Harvest Assist) (S4 dip switch 6) ......................................... 39
6. Harvest Pump Time (Harvest Assist (S4 dip switch 7) .......................................... 40
7. Factory Use (S4 dip switch 8)................................................................................. 40
8. Freeze Timer (S4 dip switch 9 & 10) ...................................................................... 40
9. Pump-Out Pump Motor Direction (S5 dip switch 1) ............................................... 41
10. Refill Counter (S5 dip switch 2 and 3) .................................................................. 41
11. Minimum Harvest Time (S5 dip switch 4) ............................................................. 41
12. Anti-Slush (S5 dip switch 5) ................................................................................. 42
IMPORTANT
CONTENTS
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