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Service and Parts Manual
Supplement
For Models
• 2075DWRR • CO2075DWR • 2075DWRWC
U-Line Corporation U-Line Corporation
8900 North 55th Street PO Box 245040
Milwaukee, WI 53223 Milwaukee, WI 53224-9540
www.U-LineService.com
Phone (414) 354-0300 • FAX (414) 354-7905
Service & Parts Tech Lines Phone (800) 779-2547 • FAX (414) 354-5696
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■ ■ Design Features Performance INTRODUCTION General Information 2075DWRR 2075DWRWC CO2075DWR 1
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■ ■ Design Features Performance NOTES 2
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■ ■ Design Features Performance INTRODUCTION INTRODUCTION Three generations of pride and quality manufacturing and design improvements are built into all U-Line products. The result: U-Line leads the market with innovative technology and superior craftsmanship. This manual contains specific instructions for servicing the U-Line Échelon 2075DWRR, CO2075DWR and 2075DWRWC. Potential Problems With HFC-134A This Service Manual has been written to cover product manufactured with HFC-134a. HFC-134A com
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■ ■ INTRODUCTION Design Features Performance SERIAL NUMBER FORMAT The serial number is divided into four segments. A typical serial number is 031234-01-5678. The first two digits of the first segment, 03, represent the year the unit was made. The next four digits, 1234, represent the shop order number. Every model is assigned a new shop order number at the beginning of a production run. The second two digit segment, 01, represents the month the unit was made. The last four digits, 5678, are an
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General Information
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■ ■ GENERAL INFORMATION Design Features Performance
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■ ■ Design Features Performance GENERAL INFORMATION LIMITED WARRANTY U-Line Corporation warrants each U-Line product to be free from defects in materials and workmanship for a period of one year from the date of purchase; and warrants the sealed system (consisting of the com- pressor, the condenser, the evaporator, the hot gas bypass valve, the dryer and the connecting tubing) in each U-Line product to be free from defects in materials and workmanship for a period of five years from the date of
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■ ■ GENERAL INFORMATION Design Features Performance WARRANTY CLAIMS PROCEDURE When submitting claims for warranty payment, please follow these guidelines. You can use any form you would normally use to bill your customer (your own computer generated form, Narda, USA, etc.). The model and serial number MUST be on the claims. Claims will not be paid without a model and serial number. If you work on more than one unit per service call please submit a separate claim for each unit. We track all defe
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■ ■ Design Features Performance GENERAL INFORMATION PARTS LISTING How to Order Replacement Parts 1. Locate the illustration(s) for the model you are servicing. 2. Refer to the area where the desired part would be installed, locate the part and note the item number assigned to it. 3. Locate the item number in the left column of the parts listing which is on the next page from the prod- uct illustration. Note the full description and the corresponding part number. If this is for a warranty unit, p
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■ ■ GENERAL INFORMATION Design Features Performance SAFETY PRECAUTIONS Do not attempt to service or repair the unit until you have read the entire procedure. Safety items through- out this manual are labeled with Warning or Caution. WARNING ! ! Warning means that failure to follow this safety statement may result in extensive product damage, serious personal injury, or death. ! Caution means that failure to follow this safety statement may result in minor or moderate personal injury, property
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2075DWRR
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■ ■ 2075DWRR Design Features Performance
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■ ■ Design Features Performance 2075DWRR COMPRESSOR/ELECTRICAL SPECIFICATIONS 2075DWRR EMU30HSC OVERLOAD PROTECTOR C RELAY COVER S R STARTING RELAY UL183-3C COMPRESSOR PINS To measure start winding resistance, measure across the C-S pins. To measure run winding resistance, measure across the C-R pins. These pins should never measure any resistance to ground. This would indicate a shorted compressor. Specifications EMU30HSC Start Winding Resistance: 28 OHMS EMU30HSC Run Winding Resistance: 8 OHMS
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■ ■ 2075DWRR Design Features Performance REFRIGERATION SYSTEMS Normal Vapor/Compression Cycle Refrigeration • Refrigerant is pumped from the compressor to the condenser as a high pressure, high temperature vapor. • As the refrigerant cools in the high pressure condenser, the vapor condenses to liquid. During this phase change, a great amount of heat is rejected with the help of the condenser fan. • The liquid then flows to the dryer where it is strained and filtered. COMPRESSOR CONDENSER DRYER
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■ ■ Design Features Performance 2075DWRR THERMISTOR The thermistor senses the compartment temperature. This is used in conjunction with the control board to determine the length of the refrigeration cycle. Thermistors generally fail due to moisture or physical damage. SERVICE NOTES 2075DWRR The 2075DWRR has the same basic refrigeration system as the 2075R with a few exceptions. • The compressor is a high efficiency Embraco EMU30HSC. • The electro-mechanical gas bulb is replaced with an electroni
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■ ■ 2075DWRR Design Features Performance THE ELECTRONIC TEMPERATURE CONTROLLERS 2075DWRR • The controller has a four minute minimum off-cycle regardless of the thermistor status. • The controller has a 4° differential built into it for the refrigerator thermistor. When it senses 38°F, the refrigerator will cool until the thermistor senses 36°F, and will not re-initiate cooling until the thermis- tor senses 40°F. When monitoring actual temperature, by pressing WARMER temporarily, the refrigera-
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■ ■ Design Features Performance 2075DWRR 2075DWRR 1 2 WARMER WARMER SET SET COOLER COOLER TEMP TEMP CLRCO011B The temperature controller is located in the top drawer. The LED display shows the temperature set point and is calibrated in degrees Fahrenheit. The controller is factory programmed for a set point of 38°F which will show when the unit is first powered-up. To display actual temperature, press the “WARMER” button momentarily. A solid status indicator light (1) will show the air temperatu
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■ ■ 2075DWRR Design Features Performance 14 REFRIGERATION SYSTEM DIAGNOSIS GUIDE SystemSuction Suction Compressor Condenser Capillary Evaporator Wattage Condition Pressure Line Discharge Tube Normal Normal Slightly below Very hot Very hot Warm Cold Normal room temperature Overcharge Higher than Very cold Slightly warm Hot to warm Cool Cold Higher than normal may frost to hot normal heavily Undercharge Lower than Warm - near Hot Warm Warm Extremely cold Lower than normal room near inlet - normal
