5
IV. Service Diagnosis ........................................................................................................... 58
A. Ice Production Check .................................................................................................. 58
B. Diagnostic Procedure .................................................................................................. 58
C. Control Board Check ................................................................................................... 61
D. Bin Control Check ....................................................................................................... 66
1. Infrared Sensor Check ........................................................................................... 66
2. Mechanical Bin Control Check ............................................................................... 67
E. Float Switch Check and Cleaning ............................................................................... 69
1. Float Switch Check ................................................................................................ 69
2. Float Switch Cleaning ............................................................................................ 69
F. Diagnostic Charts ........................................................................................................ 71
1. No Ice Production ................................................................................................... 71
2. Low Ice Production .................................................................................................74
3. Other ...................................................................................................................... 75
V. Removal and Replacement of Components .................................................................... 76
A. Service for Refrigerant Lines ....................................................................................... 76
1. Refrigerant Recovery (except MLH model) ............................................................ 76
2. Brazing .................................................................................................................. 77
3. Evacuation and Recharge (R-404A) (except MLH model) ..................................... 77
4. Refrigerant Recovery, Evacuation, and Recharge - MLH Model (low side, parallel
rack system) .......................................................................................................... 78
B. Removal and Replacement of Compressor ................................................................. 79
C. Removal and Replacement of Expansion Valve .......................................................... 80
D. Removal and Replacement of Evaporator Assembly Components ............................. 81
1. Upper Bearing Wear Check ................................................................................... 82
2. Removal and Replacement of Cutter ..................................................................... 82
3. Removal and Replacement of Extruding Head ...................................................... 83
4. Removal and Replacement of Auger ..................................................................... 83
5. Removal and Replacement of Evaporator ............................................................. 84
6. Removal and Replacement of Mechanical Seal and Lower Housing ................... 85
7. Removal and Replacement of Gear Motor ............................................................. 86
E. Removal and Replacement of Air-Cooled Condenser ................................................. 87
F. Removal and Replacement of Water-Cooled Condenser ............................................. 88
G. Removal and Replacement of Water Regulating Valve - Water-Cooled Model ........... 89
H. Adjustment of Water Regulating Valve - Water-Cooled Model ..................................... 90
I. Removal and Replacement of Fan Motor (air-cooled and remote air-cooled models) .. 90
J. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
- Remote Air-Cooled Model ....................................................................................... 91
K. Removal and Replacement of Liquid Line Valve or Suction Line Valve - MLH Model
(low side, parallel rack system) ................................................................................. 92
L. Removal and Replacement of Evaporator Pressure Regulator (E.P.R.) MLH Model
(low side, parallel rack system) ................................................................................. 93
M. Removal and Replacement of Water Valves ............................................................... 93
1. Inlet Water Valve ..................................................................................................... 93
2. Drain Valve ............................................................................................................. 94
N. Removal and Replacement of Control Board .............................................................. 95
