U-Line 2075DWRR, 2075DWRWC User Manual

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 [phone] • FAX [phone]

Service & Parts Tech Lines Phone [phone] • FAX [phone]

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INTRODUCTION

1

Design ■Features ■Performance

General Information

2075DWRR

2075DWRWC

CO2075DWR

NOTES

2

Design ■Features ■Performance

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 compres­sors will be received with a synthetic based ester oil charge. The hygroscopic (water attraction) property of
ester oil is many times greater than that of the mineral oils previously used with CFC-12. High system
moisture causes the formation of acids and alcohol which can damage the compressor. Systems should not
be left open for more than fifteen (15) minutes at any time as humidity from the air will enter system. To
assure system dehydration, the system should be pulled down to 100 microns and vacuum pump oil (min­eral oil) must not be allowed to enter the system.

Cleanliness of the system will be extremely important. The presence of residues (chlorinated or greasy
residues, mineral oil, or impurities) can lead to capillary tube restrictions, oil return problems and com­pressor damage. Flux must not

be used on brazed joints.

INTRODUCTION

3

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 internal control number used at U-Line Corporation.

INTRODUCTION

4

Design ■Features ■Performance

031234-01-5678

Year

Shop
Order
Number

Month

Factory Internal
Control Number

General

Information

GENERAL INFORMATION

Design ■Features ■Performance

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 com­pressor, 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 purchase. During the initial one-year warranty period for all U-Line products U-Line shall: (1)
at U-Line’s option, repair any product or replace any part of a product that breaches this warranty; and (2)
for all Marine, RV and Domestic U-Line products sold and serviced in the United States (including Alaska
and Hawaii) and Canada, U-Line shall cover the labor costs incurred in connection with the replacement
of any defective part. During years two through five of the warranty period for the sealed system, U-Line
shall: (1) repair or replace any part of the sealed system that breaches this warranty; and (2) for all
Marine, RV and Domestic U-Line products sold and serviced in the United States (including Alaska and
Hawaii) and Canada, U-Line shall cover the labor costs incurred in connection with the replacement of
any defective part of the sealed system. All other charges, including transportation charges for replace­ments under this warranty and labor costs not specifically covered by this warranty, shall be borne by you.
This warranty is extended only to the original purchaser of the U-Line product. The Registration Card
included with the product should be promptly completed by you and mailed back to U-Line, or you can
register on-line at www.U-LineService.com.

The following are excluded from this limited warranty: installation charges; damages caused by disasters or
acts of God, such as fire, floods, wind and lightening; damages incurred or resulting from shipping,
improper installation, unauthorized modification, or misuse/abuse of the product; customer education
calls; food loss/spoilage; door and water level adjustments (except during the first 90 days from the date of
purchase); defrosting the product; adjusting the controls; door reversal; or cleaning the condenser.

If a product defect is discovered during the applicable warranty period, you must promptly notify either the
dealer from whom you purchased the product or U-Line at P.O. Box 23220, Milwaukee, Wisconsin 53223
or at 414-354-0300. In no event shall such notification be received later than 30 days after the expiration
of the applicable warranty period. U-Line may require that defective parts be returned, at your expense, to
U-Line’s factory in Milwaukee, Wisconsin, for inspection. Any action by you for breach of warranty must
be commenced within one year after the expiration of the applicable warranty period.

This limited warranty is in lieu of any other warranty, express or implied, including, but not limited to
any implied warranty of merchantability or fitness for a particular purpose; provided however, that to
the extent required by law, implied warranties are included but do not extend beyond the duration of the
express warranty first set forth above. U-Line’s sole liability and your exclusive remedy under this war­ranty is set forth in the initial paragraph above. U-Line shall have no liability whatsoever for any inciden­tal, consequential or special damages arising from the sale, use or installation of the product or from any
other cause whatsoever, whether based on warranty (express or implied) or otherwise based on contract,
tort or any other theory of liability.

Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation
of incidental or consequential damages, so the above limitations may not apply to you. This warranty gives
you specific legal rights, and you may also have other rights which vary from state to state.

GENERAL INFORMATION

5

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 defects through warranty claims, so please be specific on what the repair was. If it is a system
leak, please specify where the leak was.

Please be sure the claim is legible. If the claim form cannot be read, it will be returned, unpaid.

U-Line will not cover part or labor claims for the replacement of a complete ice maker assembly. All ice
maker parts are available as replacement parts and are stocked in our inventory. Remember: we do not
pay customer education calls. Door and water level adjustments are 90 day warranties only.

If you are changing out a unit please supply the model and serial number of both units (the unit being
replaced and the new unit) and the R.A. number.

If a copy of the Proof of Purchase/Install is not available at the site, the technician should record the
following information on the Labor Invoice:

• The name of the selling Dealer

• The date of purchase/installation

• The Order or Invoice number (if available)

• The type of document they saw i.e. Store Receipt, Closing Papers, Sign-Off of Building Permit,
Final Walk Through, etc.

At U-Line, parts and labor claims are paid separately. Included in labor are freon and recovery charges, all
other parts are handled by the parts department. We require that some parts be returned to us, so we may
return them to our vendor. It will be noted on your packing list if we require you to return the part. If a
part is to be returned please include a copy of the packing list and a copy of your claim. If the part was
purchased at one of our part distributors, you must handle the part warranty with that company. For labor
payment please send a readable copy of your claim to U-Line Corporation, P.O. Box 245040, Milwaukee
WI, 53224-9540, for warranty payment, or fax a legible copy to 414-354-5696.

GENERAL INFORMATION

6

Design ■Features ■Performance

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 prod­uct illustration. Note the full description and the corresponding part number. If this is for a warranty
unit, please indicate and record the model and serial numbers.

4. When ordering parts, it will be necessary to supply us with Model Number, Serial Number, Part
Number, Part Description and in some cases Color or Voltage.

5. U-Line requires the return of the parts listed below if replaced under warranty.

GENERAL INFORMATION

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Design ■Features ■Performance

• Fan motors (condenser and evaporator)

•Temperature controls

•Water solenoid valves

• Pumps

•Control boards (with thermistors)

• Ice maker motors

• Bypass solenoids

• Compressors (two years old or less - lines
soldered closed)

All warranty parts will be shipped at no charge as long as warranty status has been confirmed. We require
that some parts be returned to us, so we may return them to our vendor. It will be noted on your packing
list if we require you to return a part or if you may field scrap it. If U-Line requires a defective part to be
returned, a prepaid shipping label will be included with your new replacement part. When returning parts
please enclose a copy of your packing list and a copy of your labor claim, showing the model and serial
number, and tag or label the part with the nature of the defect.

Our warranty records may not match the customer’s information. In this case a proof of purchase will be
required. If you do not have the proof of purchase at the time the order is placed, the part will be sent net
15 days (COD if you don’t have an open account with U-Line Corporation). When the proof of purchase is
provided we will credit your account (a check will be sent if the part was sent COD).

6. Parts may be ordered on-line or by FAX or phone.
On-Line: www.U-LineService.com

FAX Number: [phone]
Phone Number: [phone] or [phone]; press 3

To expedite parts shipments, on-line ordering is fastest. When placing FAX orders, copy the FAX Parts
Order Form, located in the back of this manual, when placing an order, or order on-line at
www.u-lineservice.com.

7. Effective immediately, U-Line will not pay warranty claims for the replacement of a complete ice

maker assembly. Complete ice maker assembly replacement is not necessary because all ice maker
parts are available as replacement parts and are stocked in our inventory.

REPLACEMENT PARTS: Use only genuine U-Line replacement parts. The use of non-U-Line parts can
reduce ice rate, cause water to overflow from ice maker mold, damage the unit, and may void the
warranty.

SAFETY PRECAUTIONS

Do not attempt to service or repair the unit until you have read the entire procedure. Safety items through­out this manual are labeled with Warning or Caution.

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 or equipment damage.

DANGER: Risk of child entrapment. Before you throw away an old refrigerator or freezer:
Take off the doors, leave shelves in place so that children may not easily climb inside.

• Never attempt to repair or perform maintenance on the unit until the electricity has been
disconnected.

• Altering, cutting of power cord, removal of power cord, removal of power plug, or direct
wiring can cause serious injury, fire and/or loss of property and/or life and will void the
warranty.

•Do not lift unit by door handle.

• Never use an ice pick or other sharp instrument to help speed up defrosting. These
instruments can puncture the inner lining or damage the cooling unit.

• Failure to clean the condenser every three months can cause the unit to malfunction. This
could void the warranty.

•Never install the unit behind closed doors. Be sure front grille is free of obstruction.
Obstructing free air flow can cause the unit to malfunction, and may void the warranty.

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WARNING

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WARNING

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WARNING

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GENERAL INFORMATION

8

Design ■Features ■Performance

2075DWRR

2075DWRR

Design ■Features ■Performance

COMPRESSOR/ELECTRICAL SPECIFICATIONS
2075DWRR

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

115 VOLT Capacitor: 12 µF
115 VOLT Valve Coil Resistance: 380 OHMS
115 VOLT Drain Pan Heater 6900 OHMS

UL183-3C

OVERLOAD PROTECTOR

STARTING RELAY

RELAY COVER

EMU30HSC

C

S

R

2075DWRR

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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.

• From the dryer, the refrigerant flows through the capillary tube which meters the liquid refrigerant to
the evaporator. The pressure of the refrigerant is reduced to the evaporating or low side pressure.

• The reduction of pressure on the liquid refrigerant causes it to boil or vaporize until it reaches satura­tion temperature. As the low temperature refrigerant passes through the evaporator coil, it continues to
absorb a lot of heat, causing the boiling action to continue until the refrigerant is completely vapor­ized. It is during this phase change that the most heat is absorbed (the cooling takes place) in the refrig­erator.

• The refrigerant vapor leaving the evaporator travels through the suction line to the compressor inlet.
The compressor takes the low pressure vapor and compresses it, increasing both pressure and tempera­ture. The hot high pressure gas is pumped out the discharge line and into the condenser. The cycle
continues.

2075DWRR

10

Design ■Features ■Performance

COMPRESSOR

CONDENSER

DRYER

EVAPORATOR

CAPILLARY TUBE

UL183-1

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 electronic controller. The controller features a
digital temperature display and control with two LED indicators and three touch pad buttons.

• The mullion between the two drawers has a low wattage “anti sweat” surface heater to prevent con­densation on the mullion. Additionally, there is an anti-frost heater on the drain trough.

A thermal cut-out is mounted on the base, where the thermostat is normally mounted. This energy
saving feature cuts-out the “anti-sweat” heater as well as the trough heater in high ambient tempera­tures, when in most conditions, the mullion would normally be warmed by ambient air.

• There are two interior lights and light switches. The switches are mounted in a switch box in the rear
interior of the cabinet and the lights, in a housing in the top front of the drawers.

2075DWRR

11

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 thermis­tor senses 40°F. When monitoring actual temperature, by pressing WARMER temporarily, the refrigera­tion cycle may be off, when the temperature is a degree warmer than the set point, or the refrigeration
cycle on, when it is a degree below the set point.

• The LED status indicator lights indicate compartment temperature is displayed and open thermistor. A
solid light on, in LED position (1), means compartment temperature is displayed. A flashing light, in
LED position (2), means open thermistor. (The thermistor has failed or has been out of limits.) If a
refrigerator thermistor fails, the refrigerator will shut down. A thermistor would normally fail by open­ing (no continuity), or by shorting (no resistance).

• Under most conditions, the refrigerator will remain frost-free by clearing itself between refrigeration
cycles. Because there is no thermostat bulb on the evaporator, like other U-Line refrigerators, the con­troller runs a 45 minute off-cycle for every 12 hours of clock time. The refrigerator will not cool during
this off-cycle even if the refrigerator thermistor is calling for cooling.

• The entire control system is mounted in a single housing in the top drawer.

2075DWRR

12

Design ■Features ■Performance

2075DWRR

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 temperature reading in the cabinet for approximately 10 seconds.

To adjust the temperature set point, press the “SET TEMP” button momentarily; the display will flash. Press
the “WARMER” or “COOLER” button as desired to change the set point. When the desired set point shows
on the display, wait 10 seconds and the new set point will be saved. Wait 24 hours for the temperature to
stabilize before checking the actual temperature again. The temperature range is 34°F to 45°F.

Indicator light status

LED Status Indicates

1•Solid • Compartment temperature displayed

• Flashing • Not Applicable

2•Flashing • Open Thermistor

SET

TEMP

WARMER

COOLER

2075DWRR

13

Design ■Features ■Performance

1 2

WARMER

COOLER

SET

TEMP

CLRCO011B

2075DWRR

14

Design

■

Features

■

Performance

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

temperature outlet

below room
temperature

Partial Somewhat Warm - near Very hot Top passes Room Extremely cold Lower than

Restriction lower than room warm - temperature near inlet - normal

normal-in temperature lower passes (cool) or outlet

vacuum cool colder below room

(near room temperature
temperature) backing up
due to liquid

Complete In deep Room Room Room Room No Lower than

Restriction vacuum temperature temperature temperature temperature refrigeration normal

(cool) (cool) (cool) (cool)

No 0 PSIG Room Cool Room Room No Lower than

Gas to temperature to temperature temperature refrigeration normal

25" (cool) hot (cool) (cool)

2075DWRR WIRING DIAGRAM

F

2075DWRR

15

Design ■Features ■Performance

42184-

2075DWRR

16

Design ■Features ■Performance

DO NOT service the unit until the main electrical power has
been disconnected.

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WARNING

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TROUBLESHOOTING
2075DWRR

1 Not refrigerating (compressor and fan are operating)

Cause Remedy

a. Little or no frost pattern on evaporator a. Check for sealed system leak or restriction

2 Not refrigerating (compressor not operating, fan operating)

Cause Remedy

a. Wire off or broken a. Check wiring
b. Defective compressor - check resistence b. Replace compressor
c. Defective overload c. Replace overload
d. Defective relay d. Replace relay

3 Not refrigerating (compressor and fan not operating)

Cause Remedy

a. No power to the unit a. Check that unit is plugged in
b. On/Off switch b. Check that switch is in the on position
c. Display on - check for power in to controller c. None - Check for bad wire
d. Display on - check for power out of controller d. None - Bad controller
e. Display off e. Check transformer
f. Thermistor light flashing f. Bad Thermistor
g. Display on - power in & out of controller g. Broken circuit - check wiring

4 Compressor overheating

Cause Remedy

a. Condenser air flow restricted a. Remove restriction (clean condenser and grille)
b. Condenser fan blade obstructed b. Remove blade restriction
c. Condenser fan motor stalled c. Replace fan motor
d. Defective Compressor - check resistance d. Replace compressor

5 Compressor will not stop operating

Cause Remedy

a. Defective controller a. Replace controller
b. Wiring defect b. Check wiring

6Water leak inside unit

Cause Remedy

a. Blocked drain a. Remove blockage

7 Excessive frost build-up

Cause Remedy

a. Gasket not sealing a. Repair or replace gasket
b. Product too tall for drawer or product not b. Instruct customer

allowing top bin to move forward (2075DWRR)

2075DWRR

17

Design ■Features ■Performance

8 Noisy

Cause Remedy

a. Copper refrigeration tube touching cabinet a. Carefully adjust tubing
b. Fan blade touching shroud b. Adjust fan mounting or shroud
c. Fan blade obstruction (wiring, foam insulation, c. Remove obstruction

packaging material)

9 Fresh food or wine temperature too cold

Cause Remedy

a. Controller set too cold a. Adjust controller
b. Defective controller b. Replace controller
c. Wiring defect c. Check wiring
d. Thermistor not pushed all the way into the well d. Check thermistor location

10 Excessive condensation on mullion

Cause Remedy

Mullion heater not operating - check resistance
a. Good resistance a. Bad heater switch
b. No resistance b. Heater wiring

Note: The heater will not operate in ambients over 90° F.