User manual SCOTSMAN CME1656

[. . . ] CME1356 and CME1656 INTRODUCTION This product manual contains the information needed for the setup, installation, initial start up, sanitation and maintenance of this ice machine. There are 2 models covered in this manual: Be certain that the information applies to the model in question. 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. · CME1356, having 5 evaporators · CME1656, having 6 evaporators TABLE OF CONTENTS Specifications . [. . . ] Restarts: If restarting after shutting off because the bin was full, the first freeze cycle sequence is like this: · · · · · Condenser fan is OFF Water Inlet Valve is CLOSED Water Pump may be ON Compressor is ON Hot Gas Valve is OPEN 6. machine is operating correctly, the reservoir water temperature will fall at a standard 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 it does not, 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 AutoIQ 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. Note: If there is a power interruption, after power is restored the machine will restart, go thru a brief Freeze cycle and then go thru a 6 minute Harvest cycle. The Freeze light will be blinking - even when the machine is in harvest. 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 be off and must be manually reset. May 2000 Page 22 CME1356 and CME1656 Technicians Only: Harvest Cycle Operational Sequence Harvest The (air cooled model) fan is off. If the bottom unit is in harvest and receives a signal from the top unit that it is also in Harvest, the bottom unit will stay in harvest for about 6 minutes. If the bottom unit is shut off, but its controller still has power, the top unit may continue to operate. If The water pump shuts off, it will restart in less than the bottom unit's power is shut off, the top unit will 74 seconds, depending upon the Purge Level set. If the top unit's power is shut off, it does not impact The water pump restarts and pumps out water thru the lower unit. The inlet water valve then opens for about 30 seconds to add some water. Diagnostic Lights and Manual Resets During the Harvest Cycle, ice will be falling from The controller will shut the machine off if a the evaporators and between the ice sensor's malfunction is sensed. The AutoIQ Controller monitors the machine 2 times, with a 50 minute interval between ice falling and stays in the Harvest Cycle until ice restarts. If a malfunction is still present after the quits going thru the electric eyes. second restart, the machine will then shut off and The maximum harvest time is 14 minutes. During the restart interval, the machine will be off and a diagnostic code Harvest after a restart will be a long one to establish a base line, then the actual time it took to indicated. release the ice is used to determine the length of The exception to this is lack of water. [. . . ] Note: The contactor coil is 24 volt. May 2000 Page 38 CME1356 and CME1656 Access Valves To use the access valves: 1. lb. Refrigeration System Components Due to the expected level of training and experience of a refrigeration mechanic, detailed instructions regarding the replacement of refrigeration components will not be presented. It must use polyol ester refrigerant oil, and that oil is very water absorbent. An electronic leak detector capable of locating HFC-134a type refrigerant must be used to locate refrigerant leaks. Access Valve Access Valve 2. [. . . ]