Hoshizaki KM-251BAH Service Manual page 4

IV. Service Diagnosis ........................................................................................................... 22
A. 10-Minute Diagnostic Procedure ................................................................................ 22
B. Diagnostic Charts........................................................................................................ 23
1. No Ice Production .................................................................................................. 23
2. Evaporator is Frozen Up ........................................................................................ 26
3. Low Ice Production ................................................................................................ 27
4. Abnormal Ice ......................................................................................................... 27
5. Other...................................................................................................................... 28
V. Removal and Replacement of Components .................................................................... 29
A. Servicing the Refrigeration Circuit .............................................................................. 29
1. Refrigerant Recovery............................................................................................. 29
2. Evacuation and Recharge (R-404A)...................................................................... 29
B. Brazing ........................................................................................................................ 30
C. Removal and Replacement of Compressor ................................................................ 30
D. Removal and Replacement of Drier ............................................................................ 31
E. Removal and Replacement of Expansion Valve.......................................................... 32
F. Removal and Replacement of Hot Gas Valve .............................................................. 33
G. Removal and Replacement of Evaporator .................................................................. 34
H. Removal and Replacement of Air-Cooled Condenser ................................................ 34
I. Removal and Replacement of Thermistor .................................................................... 35
J. Removal and Replacement of Fan Motor .................................................................... 36
K. Removal and Replacement of Freeze or Harvest Water Valve ................................... 36
L. Removal and Replacement of Wash Valve.................................................................. 37
M. Removal and Replacement of Pump Motor................................................................ 37
N. Removal and Replacement of Spray Tube.................................................................. 38
VI. Cleaning and Maintenance Instructions ......................................................................... 39
A. Cleaning ...................................................................................................................... 39
1. Cleaning Procedure............................................................................................... 39
2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 41
B. Maintenance................................................................................................................ 41
C. Preparing the Icemaker for Long Storage ................................................................... 42
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