Hoshizaki KML-451MAH Service Manual page 4

III. Technical Information ...................................................................................................... 20
A. Water Circuit and Refrigeration Circuit ........................................................................ 20
1. KML-451MAH (air-cooled) ..................................................................................... 20
2. KML-451MWH (water-cooled) ............................................................................... 21
B. Wiring Diagrams .......................................................................................................... 22
1. KML-451MAH (air-cooled) and KML-451MWH (water-cooled) ............................. 22
C. Performance Data ....................................................................................................... 23
1. KML-451MAH (air-cooled) ..................................................................................... 23
2. KML-451MWH (water-cooled) ............................................................................... 24
IV. Service Diagnosis ........................................................................................................... 25
A. 10-Minute Diagnostic Procedure ................................................................................ 25
B. Diagnostic Charts ........................................................................................................ 26
1. No Ice Production .................................................................................................. 26
2. Evaporator is Frozen Up ........................................................................................ 30
3. Low Ice Production ................................................................................................ 31
4. Abnormal Ice ......................................................................................................... 31
5. Other ...................................................................................................................... 31
V. Removal and Replacement of Components .................................................................... 33
A. Service for Refrigerant Lines ...................................................................................... 33
1. Refrigerant Recovery ............................................................................................. 33
2. Brazing .................................................................................................................. 33
3. Evacuation and Recharge (R-404A) ...................................................................... 34
B. Removal and Replacement of Compressor ................................................................ 35
C. Removal and Replacement of Expansion Valve ......................................................... 36
D. Removal and Replacement of Hot Gas Valve or Line Valve ....................................... 36
E. Removal and Replacement of Evaporator .................................................................. 37
F. Removal and Replacement of Water Regulating Valve - Water Cooled Model Only.... 38
G. Adjustment of Water Regulating Valve - Water-Cooled Model Only ........................... 39
H. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
- Remote Air-Cooled Model Only .............................................................................. 39
I. Removal and Replacement of Thermistor .................................................................... 40
J. Removal and Replacement of Fan Motor .................................................................... 41
K. Removal and Replacement of Water Valves ............................................................... 41
L. Removal and Replacement of Pump Motor ................................................................. 42
VI. Cleaning and Maintenance Instructions ......................................................................... 43
A. Cleaning and Sanitizing Procedures ........................................................................... 43
1. Cleaning Procedure ............................................................................................... 43
2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 44
B. Maintenance ................................................................................................................ 45
C. Preparing the Icemaker for Long Storage ................................................................... 45
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