Hoshizaki KMD-850MAH Service Manual page 4

D. Harvest Control - Thermistor ...................................................................................... 24
1. Thermistor Check Procedure .................................................................................. 24
E. Float Switch ................................................................................................................. 24
1. Float Switch Check Procedure ............................................................................... 24
2. Float Switch Cleaning ............................................................................................ 26
F. Bin Control ................................................................................................................... 27
1. Explanation of Operation ........................................................................................ 27
2. Bin Control Check Procedure................................................................................. 27
III. Technical Information ...................................................................................................... 28
A. Water Circuit and Refrigeration Circuit ........................................................................ 28
1. KMD-850MAH (air-cooled) ..................................................................................... 28
2. KMD-850MWH (water-cooled) ............................................................................... 29
3. KMD-850MRH (remote air-cooled) ........................................................................ 30
B. Wiring Diagrams .......................................................................................................... 31
1. KMD-850MAH and KMD-850MWH ........................................................................ 31
2. KMD-850MRH ....................................................................................................... 32
C. Performance Data ....................................................................................................... 33
1. KMD-850MAH (air-cooled) ..................................................................................... 33
2. KMD-850MWH (water-cooled) ............................................................................... 34
3. KMD-850MRH (remote air-cooled) ........................................................................ 35
IV. Service Diagnosis ........................................................................................................... 36
A. 10-Minute Diagnostic Procedure ................................................................................ 36
B. Diagnostic Charts ........................................................................................................ 37
1. No Ice Production ................................................................................................... 37
2. Evaporator is Frozen Up ........................................................................................ 41
3. Low Ice Production ................................................................................................ 42
4. Abnormal Ice ......................................................................................................... 42
5. Other ...................................................................................................................... 43
V. Removal and Replacement of Components .................................................................... 44
A. Service for Refrigerant Lines ....................................................................................... 44
1. Refrigerant Recovery ............................................................................................. 44
2. Brazing .................................................................................................................. 44
3. Evacuation and Recharge (R-404A) ...................................................................... 45
B. Removal and Replacement of Compressor ................................................................. 46
C. Removal and Replacement of Expansion Valve .......................................................... 47
D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve ............................ 48
E. Removal and Replacement of Evaporator ................................................................... 49
F. Removal and Replacement of Water Regulating Valve - Water-Cooled Model Only .... 49
G. Adjustment of Water Regulating Valve - Water-Cooled Model Only ............................ 50
H. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
- Remote Air-Cooled Model Only ............................................................................... 51
I. Removal and Replacement of Thermistor .................................................................... 52
J. Removal and Replacement of Fan Motor ..................................................................... 53
K. Removal and Replacement of Inlet Water Valve or Drain Valve .................................. 53
L. Removal and Replacement of Pump Motor ................................................................. 54
M. Removal and Replacement of Bin Control .................................................................. 55
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