Hoshizaki MODULAR CRESCENT CUBER KM-650MAH Service Manual page 4

III. Technical Information ...................................................................................................... 23
A. Water Circuit and Refrigeration Circuit ........................................................................ 23
1. KM-650MAH (air-cooled) ....................................................................................... 23
2. KM-650MWH (water-cooled) ................................................................................. 24
3. KM-650MRH (remote air-cooled) .......................................................................... 25
B. Wiring Diagrams .......................................................................................................... 26
1. KM-650MAH (air-cooled) and KM-650MWH (water-cooled) ................................. 26
2. KM-650MRH (remote air-cooled) .......................................................................... 27
C. Performance Data ....................................................................................................... 28
1. KM-650MAH (air-cooled) ....................................................................................... 28
2. KM-650MWH (water-cooled) ................................................................................. 29
3. KM-650MRH (remote air-cooled) .......................................................................... 30
IV. Service Diagnosis ........................................................................................................... 31
A. 10-Minute KM Diagnostic Procedure ......................................................................... 31
B. Diagnostic Charts ........................................................................................................ 32
1. No Ice Production .................................................................................................. 32
2. Evaporator is Frozen Up ........................................................................................ 36
3. Low Ice Production ................................................................................................ 37
4. Abnormal Ice ......................................................................................................... 37
5. Other ...................................................................................................................... 37
V. Removal and Replacement of Components .................................................................... 39
A. Service for Refrigerant Lines ...................................................................................... 39
1. Refrigerant Recovery ............................................................................................. 39
2. Evacuation and Recharge (R-404A) ...................................................................... 39
B. Brazing ........................................................................................................................ 40
C. Removal and Replacement of Compressor ................................................................ 40
D. Removal and Replacement of Drier ............................................................................ 41
E. Removal and Replacement of Expansion Valve .......................................................... 42
F. Removal and Replacement of Hot Gas Valve and Line Valve ..................................... 43
G. Removal and Replacement of Evaporator .................................................................. 44
H. Removal and Replacement of Water Regulating Valve - Water Cooled Model Only ... 44
I. Adjustment of Water Regulating Valve - Water-Cooled Model Only ............................. 45
J. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
- Remote Air-Cooled Model Only .............................................................................. 46
K. Removal and Replacement of Thermistor ................................................................... 47
L. Removal and Replacement of Fan Motor .................................................................... 47
M. Removal and Replacement of Inlet Water Valve ......................................................... 48
N. Removal and Replacement of Pump Motor ................................................................ 48
O. Removal and Replacement of Spray Tubes ................................................................ 49
VI. Cleaning and Maintenance Instructions ......................................................................... 50
A. Cleaning and Sanitizing Procedures ........................................................................... 50
1. Cleaning Procedure ............................................................................................... 51
2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 52
B. Maintenance ................................................................................................................ 52
C. Preparing the Icemaker for Long Storage ................................................................... 53
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