4
III. Technical Information ......................................................................................................23
A. Water Circuit and Refrigeration Circuit ........................................................................23
1. KM-501MAH (air-cooled) .......................................................................................23
2. KM-501MWH (water-cooled) ................................................................................. 24
3. KM-501MRH (remote air-cooled) ..........................................................................25
B. Wiring Diagrams ..........................................................................................................26
1. KM-501MAH (air-cooled) and KM-501MWH (water-cooled) .................................26
2. KM-501MRH (remote air-cooled) ..........................................................................27
C. Timing Chart ...............................................................................................................28
D. Performance Data .......................................................................................................30
1. KM-501MAH (air-cooled) .......................................................................................30
2. KM-501MWH (water-cooled) ................................................................................. 31
3. KM-501MRH (remote air-cooled) ..........................................................................32
IV. Service Diagnosis ...........................................................................................................33
A. 10-Minute KM Diagnostic Procedure .........................................................................33
B. Diagnostic Charts ........................................................................................................34
1. No Ice Production .................................................................................................. 34
2. Evaporator is Frozen Up ........................................................................................38
3. Low Ice Production ................................................................................................ 39
4. Abnormal Ice .........................................................................................................39
5. Other ......................................................................................................................39
V. Removal and Replacement of Components ....................................................................41
A. Service for Refrigerant Lines ......................................................................................41
1. Refrigerant Recovery .............................................................................................41
2. Evacuation and Recharge (R-404A) ......................................................................41
B. Brazing ........................................................................................................................ 42
C. Removal and Replacement of Compressor ................................................................ 42
D. Removal and Replacement of Drier ............................................................................43
E. Removal and Replacement of Expansion Valve ..........................................................44
F. Removal and Replacement of Hot Gas Valve and Line Valve .....................................44
G. Removal and Replacement of Evaporator ..................................................................45
H. Removal and Replacement of Water Regulating Valve - Water Cooled Model Only ... 46
I. Adjustment of Water Regulating Valve - Water-Cooled Model Only ............................. 46
J. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
- Remote Air-Cooled Model Only .............................................................................. 47
K. Removal and Replacement of Thermistor ...................................................................48
L. Removal and Replacement of Fan Motor ....................................................................49
M. Removal and Replacement of Inlet Water Valve .........................................................49
N. Removal and Replacement of Pump Motor ................................................................ 49
O. Removal and Replacement of Spray Tubes ................................................................50
VI. Cleaning and Maintenance Instructions .........................................................................51
A. Cleaning and Sanitizing Procedures ........................................................................... 51
1. Cleaning Procedure ...............................................................................................52
2. Sanitizing Procedure - Following Cleaning Procedure ..........................................53
B. Maintenance ................................................................................................................53
C. Preparing the Icemaker for Long Storage ...................................................................54