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16021730 Rev. 0
Important Information .................................................... 2
Component Testing ....................................................... 4
Service Procedures ....................................................... 7
Service Equipment ........................................................ 7
Drier Replacement ........................................................ 7
Refrigerant Precautions ................................................. 7
Line Piercing Valves ...................................................... 7
Open Lines ................................................................... 8
Dehydrating Sealed Refrigeration System ..................... 8
Leak Testing .................................................................. 8
Testing Systems Containing a
Refrigerant Charge ................................................... 8
Testing Systems Containing
No Refrigerant Charge ............................................. 8
Restrictions ................................................................... 8
Symptoms .............................................................. 8
Testing for Restrictions ........................................... 9
Evacuation and Charging ............................................... 9
Evacuation .............................................................. 9
Charging ................................................................ 10
Refrigerant Charge ................................................. 10
HFC134a Service Information ....................................... 11
Health, Safety, and Handling .................................. 11
Comparison of CFC12 and HFC134a Properties ..... 11
Replacement Service Compressor ................................12
Brazing ........................................................................ 12
Refrigerant Flow ...........................................................13
Cabinet Air Flow ...........................................................14
Ice and Water Flow Diagram ........................................ 15
Water Valves Diagram ..................................................16
Troubleshooting Chart................................................17
System Diagnosis ........................................................20
Disassembly Procedures
Compressor Replacement......................................23
Condenser Replacement ........................................ 24
Evaporator Replacement ........................................ 25
Heat Exchanger Replacement ............................... 27
Condenser Fan ...................................................... 28
Freezer Fan ...........................................................28
Fresh Food Fan .....................................................28
Defrost Heater ....................................................... 29
Drain Pan and Drain Tube Heater ........................... 30
Defrost Thermistor ................................................. 30
Auto Damper Stepper ............................................30
Ice & Water Fountain PC Board .............................30
Touch Fountain Board ............................................32
Fountain Bracket ................................................... 32
Ice Crusher Bin & Shelf.......................................... 33
Climate Zone Technolgy (CZT) ............................... 35
Climate Zone Bulb Upper ....................................... 36
Climate Zone Bulb Lower ....................................... 36
Cimate Zone Test ................................................... 37
Diagnostic Mode Procedures ................................. 38
Power Supply Diagnostics ..................................... 39
Diagnostic Control Mode ........................................ 40
Appendix A
Owners Manual ........ ........................................A-2
Appendix B
Installation Guide ................................................. B-2
Table of Contents