4
III. Technical Information ...................................................................................................... 22
A. Water Circuit and Refrigeration Circuit ........................................................................ 22
B. Wiring Diagrams .......................................................................................................... 23
1. KM-1601MRH ......................................................................................................... 23
2. KM-1601MRH3 ...................................................................................................... 24
C. Performance Data ....................................................................................................... 25
1. KM-1601MRH with URC-21F ................................................................................. 25
2. KM-1601MRH with URC-22F ................................................................................. 26
3. KM-1601MRH3 with URC-21F ............................................................................... 27
4. KM-1601MRH3 with URC-22F ............................................................................... 28
IV. Service Diagnosis ........................................................................................................... 29
A. Diagnostic Procedure ................................................................................................. 29
B. Control Board Check ................................................................................................... 31
C. Bin Control Check ....................................................................................................... 32
D. Float Switch Check and Cleaning ............................................................................... 33
1. Float Switch Check ................................................................................................ 33
2. Float Switch Cleaning ............................................................................................ 34
E. Thermistor Check ........................................................................................................ 35
F. Diagnostic Charts ........................................................................................................ 36
1. No Ice Production ................................................................................................... 36
2. Evaporator is Frozen Up ........................................................................................ 39
3. Low Ice Production ................................................................................................ 40
4. Abnormal Ice ......................................................................................................... 41
5. Other ...................................................................................................................... 41
V. Replacement of Components .......................................................................................... 42
A. Service for Refrigerant Lines ....................................................................................... 42
1. Refrigerant Recovery ............................................................................................. 42
2. Brazing .................................................................................................................. 43
3. Evacuation and Recharge (R-404A) ...................................................................... 43
B. Important Notes for Component Replacement ............................................................ 45
VI. Cleaning and Maintenance Instructions ......................................................................... 46
A. Cleaning and Sanitizing Procedures ........................................................................... 46
1. Cleaning Procedure ................................................................................................ 47
2. Sanitizing Procedure - Following Cleaning Procedure ........................................... 48
B. Maintenance ................................................................................................................ 49
C. Preparing the Icemaker for Long Storage ................................................................... 49
