User manual SCOTSMAN CME2006R

[. . . ] CME2006R Introduction This product manual contains the information needed for the setup, installation, initial start up, sanitation and maintenance of this ice machine. This machine incorporates advanced technology, including a scroll compressor. This manual is organized in the same way as the expected use of the machine, it begins with specifications, goes thru unpacking and setup, shows where everything is; continues with initial start up, then describes how it works. After that is the sanitation section, followed by service diagnosis and repair. All Scotsman CM3 models, like this one, feature Scotsman's AutoIQTM control system and ReliaCleanTM water system cleaning process. TABLE OF CONTENTS Introduction . [. . . ] Purge Valve July 1998 Page 23 CME2006R Technicians Only: Freeze Cycle Sequence Assuming the machine has been operational, the Freeze cycle begins with the end of the Harvest Cycle: 8. As the machine makes ice, the water level in the reservoir will ultimately fall to the Harvest Level. The first time that happens per freeze cycle the inlet water valve is re-opened and the reservoir is refilled. Note: If the freeze cycle exceeds the preset Maximum (36 minutes), the Controller will Shut Down the machine and switch on the Refrigeration Light. The end of Freeze cycle will see the machine in this state: · · · · Water Inlet Valve is Closed Water Pump is ON Compressor is ON Hot Gas Valve is Open System Controller Operation, Beginning freeze: 1. The controller checks that water fills the reservoir, if it does not fill up within 250 seconds, the controller shuts the machine down. If the discharge temperature exceeds the design maximum, shuts the machine down on a Refrigeration Error. If the machine is operating correctly, the reservoir water temperature will fall at a standard rate. The System Controller will be checking to see if the water temperature fall matches that rate. If the discharge temperature is acceptable, the water system is checked by shutting off the water pump and determining if the water level goes up enough. If, after restarting, the water level does not drop, it is assumed that there is a water pump problem and the machine Shuts Down on a Water Error. If the water level does "measure up" the water pump is restarted and the System Controller then measures how long it takes to lower the water level. If the water level does not fall, the machine Shuts Down on a Water Error. It only does this when the water temperature reaches a preset minimum. The pump will only be off for a few seconds. · · · · · Water level = below harvest position Water inlet valve will be off Water pump will be ON Compressor will be ON Hot gas valve will be off At this point Harvest begins and the System Controller switches the Harvest indicator light ON. Restarts: If the machine is restarting after it has shut off because the bin was full, the first freeze cycle sequence is like this: 1. Note: If there is a power interruption, after power is restored the machine will restart, go thru a brief Freeze cycle and go thru a 6 minute Harvest cycle. Error Restarts: The machine automatically attempts to restart 50 minutes after a shut down. If another problem occurs in the next cycle, the machine will attempt one more restart. If another problem occurs in the next cycle, the machine will shut off and must be manually reset. July 1998 Page 24 CME2006R Technicians Only: Harvest Cycle Sequence & Other Notes Harvest The Purge Valve will be open for 74 seconds. The water pump shuts off, it will restart before 74 seconds, the restart time is based on the Purge Level Setting. The pump restarts and pumps water out of the reservoir until the purge valve closes. [. . . ] Recovering the Refrigerant Because of the check valves, liquid refrigerant must be recovered thru the liquid line valve, as well as the low side access valve at the front of the machine. Use a refrigeration wrench and check that the valve stem is fully UP or OUT. Note: Open liquid line valve half way to access both sides of the liquid line. When service is complete, shut the liquid line access valve first (fully up). [. . . ]