Interior Storage Bin Cleaning; Principles Of Operation - U-Line CLRCO2075 Service And Parts Manual Supplement

SERVICING

INTERIOR STORAGE BIN CLEANING

1. Disconnect power from the ice maker.
2. Remove any ice from the storage bin.
3. Wipe down the storage bin with a solution of non-abrasive mild soap or detergent and warm water.
Rinse with clean water. Sanitize the bin with a solution of one tablespoon of bleach and one gallon of
water. Rinse thoroughly with clean water.
4. Check that all drain connections are in place.
5. Reconnect power to the unit.
6. Make sure the drain system is working properly and the drain hose is not pinched or kinked. Pour one
gallon of cool, fresh water into the ice bin. The water should drain freely. If your CLRCO2075 is
equipped with a drain pump, the pump should drain the ice bin.

PRINCIPLES OF OPERATION

The U-Line Model CLRCO2075 combines the best of Échelon refrigeration and clear ice making capabili-
ties into a single unit. A state-of-the-art microprocessor based controller simplifies operation and trou-
bleshooting. There are four primary modes of operation:
1. Ice Making and Refrigeration
2. Ice Making and No Refrigeration
3. Refrigeration and No Ice Making
4. Ice Harvest (No Refrigeration Possible)
In addition, there are four sub modes of operation:
5. All Satisfied
6. Water Fill - No Refrigeration Required
7. Cleaning (No Refrigeration Possible)
8. Water Fill with Refrigeration Required
Review the following notes for general information before reading the schematics.
These are some additional general notes and exceptions:
1. The controller has a four-minute compressor minimum off-cycle regardless of thermistor status, for
compressor protection and cycling.
2. When making ice, the controller reads liquid line temperature four minutes into the ice making cycle
to determine the length of that ice making cycle and subsequent harvest length.
3. Once an ice making cycle is initiated, it will continue through to harvest regardless of the bin sensor.
4. There is a three-minute water fill cycle when the unit is turned on, or following a cleaning cycle. If
the refrigerator is warmer than set point (which it probably will be on initial installation) there will be
cooling on the refrigerator side as shown in Mode 8. If the refrigerator is below set point for any rea-
son (recent operation, cold product, etc.), the refrigerator side will not run and the operation will be
as shown in Mode 6.
5. In order to maintain adequate refrigerator temperature, the unit will sometimes run in the refrigeration
only mode, as shown in Mode 3, even if the ice bin sensor is calling for ice. At the end of each ice
harvest, the controller checks the refrigerator sensor and if it is warmer than the higher of 42°F, or the
set point, it will go into refrigeration only mode. If it reaches 42°F and the set point is lower, it will
continue to refrigerate and start an ice making cycle. If it reaches a higher set point (say 45°F), it will
switch to ice making only mode. There is no fill cycle when ice making re-initiates in this case,
because the bin sensor has not been satisfied.
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Design Features Performance