Sub-Zero 424HAG/B-2, 424G/B-2, 424HAG/P-2, 424G/P-2, 424G/O-2 Service Manual

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Page 1

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400

Service Manual

General Information 2 Installation Information 10 Controls & Operation 30

Page 2

General Information

Wine Storage

(400-

)

Series

1-2

#3758410 - Revision C - May,2014

IMPORTANT SAFETY INFORMATION

Below are Product Safety Labels used in this manual. The "Signal Words" used are WARNING or CAUTION.

When reviewing this manual, please note these different Product Safety Labels placed at the beginning of certain sections of this manual. You must follow the instructions given in the boxes of the Product Safety Labels in order to avoid personal injury and/or product damage.

The sample Product Safety Labels below illustrate the precautions that should be taken when the signal word is observed.

INTRODUCTION

This Technical Service Manual has been compiled to provide the most recent service information for 400-2 Series units. This information will enable the service technician to troubleshoot and diagnose malfunctions, perform necessary repairs, and return a unit to proper operational condition.

The service technician should read the complete instructions contained in this manual before initiating any repairs on a 400-2 Series unit.

INDICATES THAT HAZARDOUS OR UNSAFE PRACTICES COULD RESULT IN SEVERE PERSONAL INJURY OR DEATH.

Indicates that hazardous or unsafe practices could result in minor personal injury, and/or product damage, and/or property damage.

In addition, please pay attention to the signal word “NOTE”, which highlights information that is especially important for the topic being covered.

This manual is designed to be used by Authorized Service Personnel only. Sub-Zero Freezer Co., Inc. assumes no responsibility for any repairs made on Sub-Zero refrigeration units by anyone other than Authorized Service Technicians.

Information and images contained in this manual are the copyright property of Sub-Zero Freezer Company, Inc.

Neither this manual nor any information or images contained herein may be copied or used in whole or in part

without the express written consent of Sub-Zero Freezer Company, Inc.

TECHNICAL ASSISTANCE

If you should have any questions regarding a Sub-Zero appliance and/or this manual, please contact:

Sub-Zero, Inc.

ATTN: Service Department

P.O. Box 44988

Madison, WI 53744-4988

Customer Assistance

Phone #: (800) 222 - 7820

Facsimile #: (608) 441 - 5887

Technical Assistance

(For Technicians in Customer’s Homes Only)

Phone #: (800) 919 - 8324

Parts / Warranty Claims

Phone #: (800) 404 - 7820

Facsimile #: (608) 441 - 5886

Service Department e-mail Address:

customerservice@subzero.com

Main Office Hours:

8:00 AM to 5:00 PM Central Time

Monday through Friday (24/7 Phone Coverage)

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Figure 1-2. Serial Tag Layout

Serial Tag LocationControl Panel

Figure 1-1. Serial Tag Location

424G / O 2

2191621

0.0

3.5 1.8 R134a

Jan 2005

Model Number

Serial Number

Manufacture Date

Refrigerant Charge

Total Amps Refrigerant Type

WINE

WARRANTY INFORMATION

This page summarizes the 2, 5 & 12 Year Warranty pro- vided with every 400-2 Series unit, as well as two special warranties:

• Non-Residential Warranty - Applies to units installed

in non-residential applications.

• Display/Model Home Warranty - Applies to distribu-

tor or dealer display units, and units in model

homes, sold three years after date of manufacture. Following the warranty summaries are details and notes about the warranties.

TWO, FIVE & TWELVE YEAR Warranty

• 2 year TOTAL PRODUCT, *parts and labor.

NOTE: Stainless Steel (Classic, carBon & Platinum)

doors, panels & product frames are covered by a 60

day parts & labor warranty for cosmetic defects.

• 5 Year SEALED SYSTEM, **parts and labor.

• 6th - 12th year LIMITED SEALED SYSTEM, **parts only.

ONE & FIVE YEAR Non-Residential Warranty (Example: Office, Yacht, etc.)

• 1 Year TOTAL PRODUCT, *parts and labor.

NOTE: Stainless Steel (Classic, carBon & Platinum) doors, panels & product frames are covered by a 60 day parts & labor warranty for cosmetic defects.

• 5 Year SEALED SYSTEM, **parts only.

ONE & FIVE YEAR Display/Model Home Warranty (Display units sold three years after date of manufacture)

• 1 Year TOTAL PRODUCT, *parts and labor.

NOTE: Stainless Steel (Classic, carBon & Platinum) doors, panels & product frames are covered by a 60 day parts & labor warranty for cosmetic defects.

• 5 Year SEALED SYSTEM, **parts only.

Warranty Details

* Includes, but is not limited to the following:

Electronic Control System Components, Fan & Light Switches, Fan Motors & Blades, Defrost & Drain Heaters, Defrost Terminator, Drain Pan, Drain Tubes, Wiring, Light sockets & bulbs, Door hinges, Door closers & Cams, Compressor Electricals, etc. . .

* Stainless Steel (Classic, Platinum & Carbon) doors,

panels and product frames are covered by a limited 60 day parts and labor warranty for cosmetic defects.

** Includes the following:

Compressors, Condenser, Evaporators, Filter-Driers, Refrigerant Valve Assembly, Heat-exchangers, All Tubing that Carries the Freon.

NOTE: Condenser Fan Motors, Freon, Solder and compressor electricals are NOT

considered sealed

system parts.

Warranty Notes

• All warranties begin at unit's initial installation date.

• All Warranty and Service information collected by SubZero is arranged and stored under the unit serial number, and the customer's last name. Sub-Zero requests that you have the model and serial number available whenever contacting the factory or parts distributor.

• The serial number tag for models 427-2, 427R-2, and 430-2 is located on the bottom side of the compartment divider, directly behind the control panel. (See Figures

1-1, 1-2) For model 424-2 it is on the upper compartment ceiling (not shown).

MODEL

FREEZER CO., INC.

FREEZER REFRIGERATOR

PRODUCT SERVICE 1-800-222-7820

LISTED HOUSEHOLD

REFRIGERATOR OR FREEZER

MADISON, WI

SERIAL NUMBER

TOTAL AMPS

115Vac, 60Hz, 1 Phase

REFRIGERANT

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General Information

Wine Storage

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Series

1-6

#3758410 - Revision C - May,2014

MODEL DESCRIPTIONS

This section briefly describes the models covered in this 400-2 Series Technical Service Manual. There are four basic model configurations (Models 424-2, 427-2, 427R-2, and 430-2), with esthetic variations of the exterior cosmetic components. This manual will address the four basic configurations in most cases.

The following diagrams (Figures 1-3 to 1-6) explain the 400-2 Series model numbering system.

424G/B-2 • 400 Series - 24” Wide - Glass/CarBon (or Black) Steel Wrapped Door 424HAG/B-2 • 400 Series - 24” Wide - High Altitude Glass/CarBon (or Black) Steel Wrapped Door 424G/O-2 • 400 Series - 24” Wide - Glass/Overlay Panel Application Door 424HAG/O-2 • 400 Series - 24” Wide - High Altitude Glass/Overlay Panel Application Door 424G/P-2 • 400 Series - 24” Wide - Glass/Platinum Steel Wrapped Door 424HAG/P-2 • 400 Series - 24” Wide - High Altitude Glass/Platinum Steel Wrapped Door 424G/S-2 • 400 Series - 24” Wide - Glass/Stainless Steel Wrapped Door 424HAG/S-2 • 400 Series - 24” Wide - High Altitude Glass/Stainless Steel Wrapped Door 424S/B-2

• 400 Series - 24” Wide - Solid/CarBon (or Black) Steel Wrapped Door 424S/O-2 • 400 Series - 24” Wide - Solid/Overlay Panel Application Door 424S/P-2 • 400 Series - 24” Wide - Solid/Platinum Steel Wrapped Door 424S/S-2 • 400 Series - 24” Wide - Solid/Stainless Steel Wrapped Door 424FS/G-2 • 400 Series - 24” Wide - Free Standing - Stainless Steel Wrapped Unit - Glass Door 424FS/HAG-2 • 400 Series - 24” Wide - Free Standing - Stainless Steel Wrapped Unit - High Altitude Glass Door 424FS/S-2 • 400 Series - 24” Wide - Free Standing - Stainless Steel Wrapped Unit - Solid Door

427G-2 • 400 Series - 27” Wide - Glass Door 427HAG-2 • 400 Series - 27” Wide - High Altitude Glass Door 427S-2 • 400 Series - 27” Wide - Solid Door

Figure 1-3. Model 424-2

Figure 1-4. Model 427-2

NOTE: Door panels for this model sold

separately.

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427RG-2 • 400 Series - 27” Wide - Refrigerated Drawers - Glass Door on Wine Storage Section 427RHAG-2 • 400 Series - 27” Wide - Refrigerated Drawers - High Altitude Glass Door on Wine Section 427RS-2 • 400 Series - 27” Wide - Refrigerated Drawers - Solid Door on Wine Storage Section

Figure 1-5. Model 427R-2

Figure 1-6. Model 430-2

430G/B-2 • 400 Series - 30” Wide - Glass/CarBon (or Black) Steel Wrapped Door 430HAG/B-2 • 400 Series - 30” Wide - High Altitude Glass/CarBon (or Black) Steel Wrapped Door 430G/F-2 • 400 Series - 30” Wide - Glass/Framed Panel Application Door 430HAG/F-2 • 400 Series - 30” Wide - High Altitude Glass/Framed Panel Application Door 430G/O • 400 Series - 30” Wide - Glass/Overlay Panel Application Door 430HAG/O-2 • 400 Series - 30” Wide - High Altitude Glass/Overlay Panel Application Door 430G/P-2 • 400 Series - 30” Wide - Glass/Platinum Steel Wrapped Door 430HAG/P-2 • 400 Series - 30” Wide - High Altitude Glass/Platinum Steel Wrapped Door 430G/S-2

• 400 Series - 30” Wide - Glass/Stainless Steel Wrapped Door 430HAG/S-2 • 400 Series - 30” Wide - High Altitude Glass/Stainless Steel Wrapped Door 430S/B-2 • 400 Series - 30” Wide - Solid/CarBon (or Black) Steel Wrapped Door 430S/F-2 • 400 Series - 30” Wide - Solid/Framed Panel Application Door 430S/O-2 • 400 Series - 30” Wide - Solid/Overlay Panel Application Door 430S/P-2 • 400 Series - 30” Wide - Solid/Platinum Steel Wrapped Door 430S/S-2 • 400 Series - 30” Wide - Solid/Stainless Steel Wrapped Door

NOTE: Door panels for this model sold

separately.

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General Information

Wine Storage

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Series

1-8

#3758410 - Revision C - May,2014

Wine Storage Unit Maximum Temperature 65° 18°

Sub-Zero Wine Storage Temperature Range, Recommended Wine Storage Temperatures and Recommended Wine Serving Temperatures:

Bordeaux 63° 17°

Red Burgundy 61° 16°

Beaujolais 54° 12°

Sherry 52° 11°

Rosés 48° 9°

Dry White Wines 48° 9°

Champagne 46° 8°

Sweet White Wines 43° 6°

Sparkling Wines 41° 5°

Wine Storage Unit Minimum Temperature 38° 3°

Fahrenheit Celsius

The table below shows the temperature range of the Sub-Zero Wine Storage Units. This table also shows the rec-

ommended temperatures for “serving” wines. Serving wines at the recommended temperatures will insure that white wines maintain their lively and interesting taste, and red wines will maintain their scent and flavor.

NOTE: For “long term storage” of all wines, the ideal temperature is 55°F / 13°C.

NOTE: The temperature range in the refrigerator drawer area of the 427R is 34°F / 1°C to 45°F / 7°C.

Recommended Wine Serving Temperatures

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Installation Information

Wine Storage

(400-

)

Series

2-2

#3758410 - Revision C - May, 2014

Anti-Tip Components Installation (424-2)

If anti-tip bracket needs to be installed, follow these steps (See Figure 2-1):

1. Locate and mark two wall studs at back of unit installation location.

2. Identify and mark proper height to clear unit top. Space between unit top and bottom of bracket must NOT be more then 1/4" (6.1 mm)

3. Secure bracket to wall studs, located in step 1, making sure screws extend 7/8" (22.2 mm) into each wall stud. The bracket must extend a minimum of 3" (76.2 mm) over unit.

4. Refer to Installation Guide provided with unit for any additional information needed.

Anti-Tip Components Installation (424FS-2, 427-2, 427R-2)

If anti-tip bracket needs to be installed, follow these steps (See Figure 2-2):

1. Center anti-tip bracket at back of unit installation location.

2. Secure bracket to wall studs or flooring, making sure screws extend 7/8" (22.2 mm) into each wall stud or flooring.

3. Refer to Installation Guide provided with unit for any additional information needed.

INSTALLATION CONSIDERATIONS

This section covers common installation issues seen by Service Technicians. Improper installation, though not a valid service issue, has the potential to lead to a call for service. Installation related complaints could include, but are not limited to: Unit leveling, unit movement, door misalignment, improper door and drawer sealing, internal frost or condensation, exterior condensation, warm compartment temperatures, etc.

NOTE: If additional installation information is needed, refer to the complete Installation Guide, or contact Sub-Zero Service Department.

UNIT COULD TIP UNDER CERTAIN LOAD CONDITIONS. FAILURE TO INSTALL ANTI-TIP COMPONENTS AND EXTEND FRONT LEVELERS TO FLOOR ACCORDING TO INSTALLATION MANUAL CAN RESULT IN SERIOUS INJURY OR DEATH.

Figure 2-1. Anti-Tip Components

Wall Stud

Bracket

Figure 2-2. Anti-Tip Components

Bracket

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#3758410 - Revision C - May, 2014

Sub-Zero Unit

Figure 2-3. Anti-Tip Components

Wall Stud

Wood Block

Screws & L-Bracket

Min. 3” (76.2 mm)

Anti-Tip Components Installation (430-2)

If anti-tip components (aka wood block / blocking kit) need be installed, follow these steps (See Figure 2-3):

1. Locate and mark two wall studs at back of unit installation location.

2. Identify and mark proper height to clear unit top. Space between unit top and bottom of wood block must NOT be more then 1/4" (6.1 mm).

3. Using the L-brackets and screws provided, secure wood block to wall studs, located in step 1, making sure screws extend 7/8" (22.2 mm) into each wall stud. The wood block must extend a minimum of 3" (76.2 mm) over unit.

4. Utilizing front and rear levelers, raise and level unit until it contacts wood block (See leveling instructions on following pages).

5. Refer to Installation Guide provided with the unit for any additional information needed.

Unit Leveling (424-2, 424FS-2)

NOTE: Model 424-2 must be leveled before installing into rough-in opening. If unit is already installed and anchored with countertop bracket (See Figure 2-4), Extract anchor screws before leveling, reinstalled after.

To Level 424-2 - Place it in front of rough-in opening, then turn each leveling leg clockwise to raise unit, counterclockwise to lower unit (See Figure 2-5).

To Level 424FS-2 - Turn each leveling leg clockwise to raise unit, counterclockwise to lower unit (See Figure 2-2).

Figure 2-5. Leveling Legs

Figure 2-4. Countertop Bracket

Leveling Legs (4) Clockwise to raise, Counterclockwise to lower

Countertop Bracket

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Series

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#3758410 - Revision C - May, 2014

Rear leveling legs will move only 1/16” (2 mm) for every 18 revolutions of the Phillips-head adjusting screw. Do not

over torque. Use lowest torque setting on any power screwdriver. Do not turn rear leveling legs by hand, doing so will damage rear leveler assembly.

Figure 2-6. Molding & Brackets

Figure 2-9. Adjusting Rear Levelers

Figure 2-8. Adjusting Front Leveling Legs

Figure 2-7. Kickplate/Grille Removal

Side Molding

Unit to Cabinet Bracket

Kickplate/ Grille

Rear Leveler Adjusting Screw

Front Leveling Leg

Rear Leveler Assy

Screw

Unit Leveling (427-2 & 427R-2)

NOTE: Unit must be installed before final leveling

. If unit is anchored to cabinets, remove anchor screws before leveling, reinstalled after (See Figure 2-6).

1. Remove kickplate/grille (See Figure 2-7).

2. To raise front, turn front leveler legs counterclock-

wise, clockwise to lower (See Figure 2-8).

3. At front of unit base is an adjusting screw that reach-

es to rear leveler assembly. To raise rear, use Phillips-head screwdriver to turn adjusting screw clockwise, counterclockwise to lower (See Figure 2-

9).

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Figure 2-11. Kickplate Removal

Figure 2-13. Adjusting Rear Levelers

Kickplate

Screw (2)

Unit Leveling (430-2)

NOTE: Unit must be installed before final leveling

. If unit is anchored to cabinets, remove anchor screws before leveling, reinstalled after (See Figure 2-10).

1. Remove kickplate (See Figure 2-11).

2. To raise front, turn front leveler legs counterclock-

wise, clockwise to lower (See Figure 2-12).

3. At front of unit base is an adjusting screw that reach-

es to rear leveler/roller assembly. To raise unit rear, use 5/16” socket wrench to turn adjusting screw clockwise to raise, counterclockwise to lower (See Figure 2-13).

NOTE: Level is best checked at top & side mainframe.

Figure 2-12. Adjusting Front Leveling Legs

Figure 2-10. Anchoring Screws Removal

Screw

Rear Leveler Adjusting Screw

Front Leveling Leg

Rear Leveler Assy

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Installation Information

Wine Storage

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)

Series

2-6

#3758410 - Revision C - May, 2014

Figure 2-15. Door / Top Cabinet Hinge Adjustment

Figure 2-16. Door / Top Door Hinge Adjustment

Cabinet Hinge

Shipping Screws

Door Adjustment (424-2, 424FS-2)

NOTE: Unit must be level before adjusting door.

NOTE: If 424FS-2 door needs adjusting, stainless steel

wrap must be removed to adjust top cabinet hinge (See Figure 2-14).

If unit is properly installed, blocked and leveled, it may still be necessary to adjust door left to right and/or in and out. Adjustments are performed at top and/or bottom cabinet

hinge(s) (See Figure 2-15).

1. Working on only one hinge at a time (top or bottom), remove and discard two small Phillips head shipping screws from cabinet hinge before attempting adjustments.

2. Using a 1/8” Allen-wrench, loosen and “re-snug” cabinet hinge screws, allowing door adjustment.

3. Adjust door as required.

4. After adjusting door, tighten cabinet hinge screws and check for proper door seal.

Door and/or Drawer Adjustment (427-2 & 427R-2)

NOTE: Door and/or drawers on models 427-2 & 427R2 are non-adjustable. Instead, door and/or drawer pan

els must be adjusted if there is alignment problems. Refer to Installation Manual.

NOTE: Unit must be level before adjusting door and/or drawer panels.

Door Adjustment (430-2)

If unit is properly installed, blocked and leveled, it may still be necessary to adjust door left to right and/or in and out. Adjustments are performed at top and/or bottom door

hinge(s) (See Figure 2-16).

1. Working on only one hinge at a time (top or bottom),

remove and discard two small Phillips head shipping screws from door hinge before attempting adjustments.

2. Using a 1/8” Allen-wrench, loosen and “re-snug” door

hinge screws, allowing door adjustment.

3. Adjust door as required.

4. After adjusting door, tighten door hinge screws and

check for proper door seal.

Remove shipping screws.

Loosen and re-snug cabinet hinge screws.

Top

Door Hinge

Door Hinge Screws

Figure 2-14. Wrap Removal

1. Remove back brackets.

2. Slide wrap forward & lift up

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Door Stop Adjustment (427-2 & 427R-2)

Models 427-2 and 427R-2 have a 90° door stop cam built into the hinge system. The 90° door stop cam is located in the center portion of the hinge.

To adjust the stop, use a standard straight-blade screwdriver to rotate cam until stop point is reached. (See Figure 2-17)

NOTE: Door stop adjustment must be performed at both bottom and top hinges.

Door Stop Installation (430-2)

For the model 430, optional 90° and 105° door stops are available, free of charge from Parts Distributors and/or Product Distributors. The part number for the 90° stop is #DS90, and the part number for the 105° stop is #DS105.

To install a door stop, the door must be closed, then (See Figure 2-18):

1. Slide door stop cam up onto bottom hinge pin.

2. Position stub on door stop into hole in cabinet hinge.

3. Retain door stop by pushing E-Ring into groove at end of bottom hinge pin, making sure E-ring is clipped securely into groove.

Figure 2-17. Door Stop Adjustment

Figure 2-18. Door Stop Installation

E-Ring

Door Stop

Hinge Pin

90° Stop Cam

Page 13

Installation Information

Wine Storage

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)

Series

2-8

#3758410 - Revision C - May, 2014

Figure 2-20. Poly Tape Removal

Figure 2-21. Stainless Steel Door Panel Removal

Poly Tape

Door Gasket

Door Frame

Handle Screws

SS Handle

(Door Hinges &

Screws - not shown)

SS Panel

Poly Tape

Door Assy

METAL DOOR PANELS MAY HAVE SHARP EDGES. PROTECTIVE GLOVES SHOULD BE WORN WHEN HANDLING PANELS.

DOOR PANELS MAY BE HEAVY OR UNSTABLE. IF THEY WERE TO FALL, THEY COULD CAUSE SERIOUS PERSONAL INJURY.

Door Panel Removal and Installation (All Models)

Figure 2-19. Door Closer Removal

Door Closer

Hinge Pin

Classic, carBon and Platinum Stainless Steel Door Panel Removal and Installation (424-2)

To remove a 424-2 SS door panel, the door must first be removed from the unit.

To Remove the Door:

1. Remove mounting screws securing door closer to the unit base (See Figure 2-19)

2. Slide door closer down off of bottom door hinge pin

NOTE: It may be necessary to lean unit back slightly to create enough clearance between hinge pin and floor.

3. Open door and extract screws from top door hinge.

4. Lean door away from unit slightly and lift door out of bottom cabinet hinge.

To Remove a Stainless Steel Panel:

1. Lay door down and remove bottom door hinge and switch depressor. (If lock and/or screws are present on bottom handle side, remove them also.)

2. Remove Poly-tape under gasket on handle side which covers handle mounting screw holes (See Figure 2-20).

NOTE: Do not

discard tape. It must be reapplied

when panel is reinstalled.

3. Extract handle mounting screws and pull handle from front of door (See Figure 2-21).

4. Lift stainless steel panel from door.

NOTE: To install stainless steel panel, reverse steps above.

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Figure 2-23. Overlay Door Panel Removal

Door Assy

Poly Tape

Panel Mounting Screws

Overlay Panel

SS Handle Shown (Handle may vary)

Figure 2-22. Poly Tape Removal

Poly Tape

Door Gasket

Door Frame

Overlay Door Panel Removal and Installation (424-2)

Overlay panels are attached to the door using screws passing through the door frame from the rear, into the panel. The handle may also be attached through the door frame or just through the panel.

To Remove an Overlay Panel:

1. Open door.

2. Remove Poly-tape under gasket which covers

panel mounting screw holes (See Figure 2-22).

NOTE: Do not

discard tape. It must be reapplied

when panel is reinstalled.

3. Extract panel mounting screws, and possibly handle

mounting screws. (See Figure 2-23)

4. Pull overlay panel from door.

NOTE: To install overlay panel, reverse steps above.

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Figure 2-25. Door Panel Removal

Figure 2-26. Drawer Panel Removal

Drawer Panel

Mounting Bracket

- Upper

Drawer Panel

Mounting

Bracket

- Bottom

Door Panel Removal and Installation (427-2 & 427R-2)

Models 427-2 and 427R-2 are NOT supplied with panels from the factory. Panels are purchased separately. Door panels are attached with screws passing from the rear through the door frame into the panel. The handle is attached to the panel.

To remove a door panel:

1. Open door.

2. Remove Poly-tape under gasket which covers panel mounting screw holes (See Figure 2-24).

NOTE: Do not

discard tape. It must be reapplied

when panel is reinstalled.

3. Extract panel mounting screws. (See Figure 2-25)

4. Pull panel from door.

NOTE: To install panel, reverse steps above.

Drawer Panel Removal and Installation (427R-2)

NOTE: Model 427R-2 is NOT supplied with panels from the factory. Panels are purchased separately. Drawer panels are attached using screws passing through mounting brackets at the bottom of each drawer, and a dog-eared bracket on the back of the panel fitting into slots in the face of the drawers. Handles are attached to the panels.

To remove a drawer panel (See Figure 2-26):

1. Open drawer.

2. Extract the six screws at bottom drawer panel bracket.

3. Pull bottom of drawer panel out slightly while pulling downward.

NOTE: To install panel, reverse steps above.

Figure 2-24. Poly Tape Removal

Poly Tape

Door Gasket

Door Frame

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Figure 2-29. Stainless Steel Door Panel Removal

Panel

Door Assy

Handle Screw

(Door Hinges &

Screws - not shown)

Handle

Door closer is spring loaded and may recoil quickly when detached.

Hinge-Side Panel Mounting Screw

Handle Stand-off

Panel Spacer/ Washer

Classic, carBon and Platinum Stainless Steel Door Panel Removal and Installation (430-2)

To remove a 430-2 SS door panel, the door must first be removed from the unit.

To Remove the Door:

1. Open door until hole in bottom cabinet hinge aligns

with hole in door closer arm (See Figure 2-27).

2. Insert short screwdriver up into the two holes.

NOTE: This screwdriver will be used to pry the door closer arm back onto the door hinge stud.

3. Use a small straight-blade screwdriver to remove E-

ring which holds door closer arm to bottom door hinge stud.

4. Pry door closer arm down off of door hinge stud.

Figure 2-27. Door Closer Disconnect

Remove E-Ring

Pry down

Screwdriver up into holes

Figure 7-28a.

Trim/Hinge Removal

Lean door

away from

unit and

lift up

Door

Trim

Door Hinge

Figure 7-28b.

Door Removal

5. Remove hinge-side door trim (See Figure 7-28a).

6. With a 1/8” Allen-wrench and Phillips screwdriver,

extract all screws from top door hinge.

7. Lean door away from unit and lift off of bottom cabi-

net hinge (See Figure 7-28b).

NOTE: When reinstalling door, use screwdriver in cabinet hinge hole and door closer arm hole to pry door closer arm back onto the door hinge stud.

To Remove a Stainless Steel Panel:

1. Lay door down and remove bottom door hinge and

switch depressor at top of door. (If lock and/or screws are present on top handle side, remove them also.)

2. Remove panel mounting screws from hinge side of

door.

3. Remove Poly-tape under gasket on handle side

which covers handle mounting screw holes (See Figure 2-29).

NOTE: Do not

discard tape. It must be reapplied

when panel is reinstalled.

4. Extract handle mounting screws and pull handle

from front of door.

5. Lift stainless steel panel from hinge side first, pivot-

ing it off of handle side of door.

NOTE: To install stainless steel panel, reverse steps above.

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Figure 2-30. Trim Molding Removal

Figure 2-31. Framed and Overlay Handle / Handle

Side Trim & Door Panel Removal

Framed & Overlay Door Panel Removal / Installation (430-2)

Framed and overlay panels are attached to the door by sliding 1/4” (6 mm) thick edge of panel under door trim. On the handle side, there may also be additional screws passing through the door frame from rear into the panel for increased support. Overlay handles may also be attached through the door frame, or just through the panel.

To remove a framed or overlay panel, the handle, or trim on handle side must first be removed. Handles and/or handle-side trim is secured to the door with screws. The screw heads are then concealed by a magnetic trim strip.

To Remove Handle or Handle-side Trim (See Figure 7-30 & 7-31):

1. Press a sticky piece of tape to center of magnetic trim strip.

2. Pull tape so that trim strip bows away from door, disengaging both ends of trim strip from the endcaps.

3. With mounting screws exposed, extract the screws, then pull handle (or handle-side trim) from door.

To Remove Panel (See Figure 7-31):

1. Slide panel towards handle side, and out from under door trim.

NOTE: If the panel will not slide from under door trim, panel mounting screws and/or handle mounting screws may have been used.

a. Open door and remove Poly-tape from under

gasket.

b. Extract panel mounting screws, and/or handle

mounting screws.

c. Slide panel towards handle side, and out from

under door trim.

Magnetic

Trim Molding

Handle or Handle-side Trim

Screws

Piece of Tape

Framed or Overlay Panel

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Term/Component Definition / Description

Control Board …………………………..The printed-circuit board (PC Board) containing the microprocessor, relays

and electrical connections for monitoring and controlling functions and operations of the unit.

Microprocessor ……………………...... An electrical component on the control board which receives electrical signals

from other components, processes that information, then sends an electrical signal to the relays on the board to open or close, and other electronic components in the unit to switch on or off.

Relay …………………………………… Electrical components on the control board which switch other components in

the unit ON and OFF when instructed to do so by the microprocessor.

LED (Light Emitting Diode) ………...... A small electronic “tube” that lights-up when power is supplied to it. In the

control panel assembly, LED’s are arranged to show values (numbers). LED’s are also used as back-lighting for the indicators in the control panel.

Control Panel Assembly ………………The information input and read-out area of the electronic control system,

located between the two wine storage compartments. NOTE: The model

427R-2 also has a control panel assembly at top front of the top refrigerator drawer assembly.

Membrane Switch …………...……….. An integral part of the control panel assembly, which consists of the function

keys used for all input functions to the electronic control system.

Keys (Function Keys) ………………… The buttons on the Membrane switch used for input functions. (The keys are:

UNIT ON/OFF, LIGHTS ON/OFF, ALARM ON/OFF, COLDER, WARMER)

Indicators ………………….....………... The words and numbers that are displayed at the control panel. (Example:

Temperature displays, temperature alarm bell, “SERVICE”, and error codes.)

Set-Point ……………………………….. The desired compartment temperature, established by pressing the COLDER

or WARMER keys.

High Offset (Cut-in)………………….....During normal operation of a wine storage unit, it is the maximum evaporator

temperature the electronic control system will allow before calling for cooling.

Low Offset (Cut-out)…………………... During normal operation of a wine storage unit, it is the minimum compart-

ment air temperature the electronic control system will allow before interrupt-

ing cooling. Offset Temperature Range …………... The difference between the low offset and the high offset. Thermistor (Temperature Sensor) ….. A resistor with which resistance changes as temperatures around it change.

For electronic control system purposes, the microprocessor measures this

resistance and displays it as a temperature reading at the control panel. Display Units of Measure……………...Temperatures displayed at the control panel may be in fahrenheit (°F), or cel-

sius (°C), units of measure. Switching from one to the other display units of

measure is accomplished through a series of key strokes. Error Codes .…………………………... The code numbers accompanied by the letters “EC” that appear in the control

panel display windows during diagnostic mode if the unit experienced specific

problems related to electrical signals supplied by electrical components.

Electrical “Pulse”.................................. A non-constant supply of voltage, or electrical signal, the duration of which is

often measured in milliseconds.

Electrical Polarity..................................The positive ( + ) and negative ( - ) sides of the alternating current sinewave.

WINE STORAGE ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS

The electronic control system monitors, regulates and controls a variety of functions; it also displays temperatures, possible problems with the appliance and the temperature alarm bell status.

The table below defines some basic electronic control terminology. An understanding of this information is needed in order to comprehend the operations and functions of the electronic control system.

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BASIC WINE STORAGE ELECTRONIC CONTROL SYSTEM

This page contains a basic illustration of the 400-2 Series electronic control system (See Figure 3-1). Input operations are performed at the membrane switch (part of the control panel assembly), with monitoring, regulating and controlling functions taking place at the control board (located directly behind the control panel). Temperatures and possible problems with the unit are displayed at the control panel display. The entire electronic control system is described in greater detail on the following pages.

NOTE: The diagram below is not an exact electrical representation of the electronic control system. For more detailed electrical diagrams refer to the wiring diagram and schematic supplied with the unit.

Figure 3-1. Basic Wine Storage (400-2) Series Electronic Control System

WINE STORAGE

ON/OFF

N.C.

COLDER WARMER COLDER WARMER

BELL ON

SERVICE

LIGHTS

UNIT

ON/OFF

N.O.

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Figure 3-2. Control Board Layout

Figure 3-3. Control Board Summary Table

WINE STORAGE CONTROL BOARD LAYOUT AND SUMMARY TABLE

The electrical connection points on the wine storage control board are labeled Alphanumerically. These labels correspond with the alphanumeric control board summary layout table on the wiring diagram. By referencing the table, it is possible to identify which components are connected at which connection points on the control board. Below is a layout diagram of the control board, followed by a copy of a summary table. (See Figures 3-2 and 3-3)

NOTE: All components on the control board are non-replaceable. If problems with the control board are identified, the complete control board must be replaced.

DESCRIPTIONCIRCUIT FUNCTION COLOR

TAN

WHT/RED

WHT/BLUE

GRAY/WHT

CONTROL REF

FOR HOME ALARMS

EMPTYP2

ALARM CIRCUIT-COMMON FOR HOME ALARMS

ALARM CIRCUIT-NORMALLY CLOSEDP4 FOR HOME ALARMS

ALARM CIRCUIT-NORMALLY OPEN

BLUE/WHITELOWER CABINETP2 SENSES TEMPERATURE

BLUE/BLACKUPPER CABINETP3 SENSES TEMPERATURE

BLUE/REDLOWER EVAPORATORP5 SENSES TEMPERATURE

BLUE/BLACKUPPER CABINETP4 SENSES TEMPERATURE

ORANGE/REDLOWER EVAPORATORP6 SENSES TEMPERATURE

BLUE/YELLOWUPPER EVAPORATORP7 SENSES TEMPERATURE

ORANGE/YELLUPPER EVAPORATORP8 SENSES TEMPERATURE

1 2

WINE

CONTROL

BOARD

E2 E1 E3

LOW VOLTAGE CIRCUITS

GRAY

BLACK

POWER INTO BOARD

POWERS COMPRESSOR

J2 THERMISTER CIRCUITS

P1 REFRIGERANT VALVE

P1 LOWER CABINET SENSES TEMPERATURE BLUE/WHITE

WHITE

COOLS LOWER COMPARTMENT

NEUTRAL INTO BOARD

POWER IN

EMPTY

COMPRESSOR

NEUTRAL

LOWER EVAP. FAN

EMPTYP7

UPPER EVAP. FAN COOLS UPPER COMPARTMENT

LIGHTS OVERRIDEP9 ORANGEON WHEN LIGHTS ON 100%

EMPTY

400 SERIES CONTROL BOARD SUMMARY/ LAYOUT

P12

P8 BLUE

P11

P10 PINK

P6 EMPTY

E3 LIGHTS POWERS LIGHTS BROWN

P13

P14 GROUND EARTH GROUND GREEN/YELLOW

CIRCUIT DESCRIPTION FUNCTION COLOR

120 VOLT CIRCUITS

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WINE STORAGE CONTROL PANEL LAYOUT

Figure 3-4. Wine Storage Control Panel Layout

WHEN IN OFF MODE, 115 VOLTS AC IS STILL PRESENT AT CONTROL BOARD.

Figure 3-5. Unit ON/OFF, Press UNIT ON/OFF Key

BASIC WINE STORAGE INPUT OPERATIONS

The following pages describe basic input operations performed at the control panel. The subjects covered are: switching unit ON / OFF; adjusting set-point (temperature adjustment); switching lighting system ON / OFF, and enabling and disabling temperature alarm feature. Please note that though possible to display temperatures in Fahrenheit or Celsius, in most cases Fahrenheit readings are shown.

Unit ON/OFF

400-2 Series units are shipped in the Off Mode. By pressing and releasing the UNIT ON/OFF key, power is allowed past the control board to the rest of the unit (See Figure 3-5).

BELL ON

SERVICE

indicators

Upper

Compartment

Temp Reading

Lower

Compartment

Temp Reading

Upper Compartment

COLDER

key

WARMER

key

Lower Compartment

COLDER

key

WARMER

key

Alarm Bell

ON/OFF key

UNIT

ON/OFF

key

LIGHTS ON/OFF

key

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Adjusting Set-Points (Temperature Adjustments)

To adjust set-points, press WARMER or COLDER key on control panel in multiple key strokes

until desired set-point

is achieved (See Figure 3-6). One key stroke equals one degree (1°) change.

NOTE: To check set point, press either the WARMER or COLDER key, keeping in mind that the initial key stroke will change the previous set-point by a one degree increment or decrement depending on key stroke choice.

NOTE: The set-point will be displayed for ten (10) seconds after the last key stroke. After the 10 second delay, the compartment temperature will be displayed. As the compartment temperature changes, the temperature displayed on the LCD will change by no more than one degree per minute.

NOTE: The temperature range in a wine storage compartment is 38°F / 3°C to 65°F / 18°C.

Figure 3-6. Adjust Set-Point, Press COLDER or WARMER Keys

Lighting System ON/OFF

For the purpose of displaying a wine supply, it is possible to energize the lights 100% of the time, even if the door is closed. To do so, press and release the LIGHTS ON/OFF key (See Figures 3-7). To disable this feature, press and release the LIGHTS ON/OFF key again.

Alarm “BELL” ON/OFF (Temperature Alarm)

There is an audio/visual temperature alarm that can be enabled to warn a customer if excessive warm or cold temperatures are experienced. To enable the alarm, press and release the key with the bell on it (See Figure 3-8). If the alarm is enabled, the BELL ON indicator will illuminate. To disable this feature, press and release the key with the bell on it again, and the BELL ON indicator will de-energize.

NOTE: If the alarm is enabled and there is a temperature problem, the BELL ON indicator will flash and the alarm will beep. The alarm feature can also be tied in with a home security alarm system.

Figure 3-7. Light System ON/OFF, Press LIGHTS ON/OFF Key

Figure 3-8. Alarm Bell ON/OFF, Press

Adjusting lower compartment set-point “colder”

(Alarm Bell) Key

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UNIQUE WINE STORAGE INPUT OPERATIONS

The following pages illustrate unique input operations performed at the control panel, namely: Temperature Units Selection Mode, Sabbath Mode and Showroom Mode.

Temperature Units Selection Mode (Selecting Degrees Fahrenheit or Degrees Celsius Display)

The electronic control is initially set to display temperature in Fahrenheit (°F) units of measure. Units of measure can be converted from °F to °C (Celsius), and/or back again. This operation is called Temperature Units Selection.

NOTE: Temperature Units Selection must be performed within the first minute after switching the unit ON.

To convert temperature units of measure from Fahrenheit (°F) to Celsius (°C) readings, press and hold the alarm bell key and the UNIT ON/OFF key simultaneously for five (5) seconds, then release the keys (See Figure 3-9). A temperature is now shown in the left display window, and the right display window indicates the units of measure as °F or °C. In this case, a temperature will be displayed in Celsius (°C) units of measure. (See Figure 3-10)

To switch from Celsius to Fahrenheit, repeat the steps above within 1 minute of switching the unit on.

NOTE: Temperature Units Selection Mode will end ten (10) seconds after the last key stroke.

NOTE: Do not

press and hold the UNIT ON/OFF key first, that will simply switch the unit OFF.

Figure 3-9. Initiating Temperature Units Selection Mode:

Press and Hold Alarm Bell Key and Unit ON/OFF Key Simultaneously for Five (5) Seconds

Figure 3-10. Temperature Units Selection Mode Initiated, Celsius Units (°C) Displayed

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Sabbath Mode (Lights Off Mode)

Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the LEDs and lighting system.

To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-11), then press and hold the UNIT ON/OFF key for ten (10) seconds, until the LEDs and lights switch OFF (See Figure 3-12). To return to normal operation, press and release the UNIT ON/OFF key.

NOTE: During Sabbath Mode, the evaporator fans may function when the door is open.

NOTE: During Sabbath Mode, the LEDs are disabled and set-points cannot be changed.

Figure 3-11. Switch Unit OFF First

Figure 3-12. Initiate Sabbath Mode, Press and Hold UNIT ON/OFF Key for 10 Seconds

Hold for 10 Seconds

Showroom Mode

Showroom Mode was incorporated into the electronic control system so the appliance could be displayed in a showroom setting. When in Showroom Mode, all cooling functions are disabled, but the lighting system remains active.

To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-13). Then press and hold the upper compartment WARMER and COLDER keys, and the UNIT ON/OFF key, then release all three keys (See Figure 3-14). The unit is now in Showroom Mode. This can be verified by checked for evaporator fan operation, and/or compressor operation. To return the unit to normal operation, repeat the steps above.

NOTE: Always check set-points after returning unit to normal operation.

Figure 3-13. Switch Unit OFF First

Figure 3-14. Initiate Showroom Mode,

Press Upper

COLDER and WARMER Keys and UNIT ON/OFF Key, then Release

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FUNCTION OF THE WINE STORAGE ELECTRONIC CONTROL SYSTEM

The following pages explain monitoring, regulating and controlling functions of the electronic control system. In most cases signal traces for the 424-2 wiring schematic are used to show current flow for functions being explained.

TO AVOID ELECTRIC SHOCK, POWER TO THE UNIT MUST BE DISCONNECTED WHENEVER ACCESSING AND/OR REMOVING COMPONENTS POWERED BY ELECTRICITY OR COMPONENTS NEAR OTHER ELECTRICAL COMPONENTS.

EVEN WHEN UNIT IS SWITCHED OFF, AC POWER IS STILL PRESENT AT THE CONTROL BOARD.

Supply Power to the Lighting System

When the unit is plugged in, a continuous 115 Volts AC is supplied to the lighting system, making it possible to energize the lights 100% of the time, even if the door is closed. (See Lighting System ON/OFF). The lighting system can also be disabled for observance of certain religious days, (See Sabbath Mode). The illustration below shows normal operation, with 115 Volts AC supplied to the unit. (See Figure 3-15)

ELECTRIC SHOCK HAZARD. 115 VOLTS AC IS STILL PRESENT AT THE CONTROL BOARD AND LIGHT SWITCH WHEN LIGHTS ARE DISABLED.

Figure 3-15. Lighting System Signal Trace (Normal Operation)

NOTE: If display lighting is activated, power is sup-

plied to lights, bypassing light switch

GREEN/YELLOW

NEUT

GRAY

WHITE

LIGHTS

UPPER

EVAPORATOR FAN MOTORS

LOWER

AWECO REF VALVE

680 Ω

BROWN

N.C.

ORANGE

PINK

N.O.

BLUE BLUE

N.O.

TAN

ORANGE

PINK

CONDENSER FAN MOTOR

STARTING RELAY

OVERLOAD PROTECTOR

WHITE

COMPRESSOR

WINE

CONTROL

BOARD

BLACK

115 VOLTS 60 CYCLES

1 2

BLUE

PINK

E2 E1 E3

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Display Average Compartment Temperatures

The temperature signal from the thermistor in each compartment is monitored by the microprocessor, then displayed in the control panel display. The LED arrow closest to the appropriate display window indicates which compartment (upper or lower) the temperature is associated with. Though compartment air

temperature fluctuates slightly, the

“average” temperature is displayed (See Figure 3-16).

NOTE: The temperature range in a wine storage compartment is 38°F / 3°C to 65°F / 18°C.

NOTE: If a compartment temperature should ever exceed either the high offset or low offset (for example: when a

door is left open), the temperature displayed at the control panel will change by 1° per minute.

Figure 3-16. Temperature Display (Shown in Fahrenheit Units of Measure)

Upper

Compartment

Temp Reading

Lower

Compartment

Temp Reading

Lower Compartment Arrow

Upper Compartment Arrow

Page 27

Control Compressor, Condenser Fan, Dual Refrigerant Valve and Evaporator Fan Motors

The control senses evaporator and compartment temperatures via thermistors; one on each evaporator, and one in each compartment. High Offset (Cut-in) is governed by the evaporator temperatures. Low Offset (Cut-out) is governed by the compartment temperatures. High Offset and Low Offset are based on the set-point.

If either evaporator calls for cooling (evaporator temperature at high offset), power is supplied to the compressor and condenser fan motor, cycling them ON. The corresponding evaporator fan relay supplies power to the appropriate evaporator fan switch, cycling the fan on. Then, two relays on the control board are used to control the dual refrigerant valve. The relays are in series with one another. The first “pulse” relay controls the length of time the solenoid is energized (500ms / 30 pulses per 1/2 second). The second “sign” relay controls the negative polarity, or positive polarity of the pulse supplied to the valve’s solenoid (determined by which evaporator is calling for cooling, ( + ) = Upper Evaporator, ( - ) = Lower Evaporator). So, when an evaporator calls for cooling, the bead inside of the T-connection of the refrigerant valve is forced to one side or the other, depending on the polarity of the pulse, supplying refrigerant to the appropriate evaporator (See Figure 3-17).

NOTE: If neither compartment is calling for cooling, the compressor and condenser fan are switched off. NOTE: Evaporator fans are switched off when the door is open and disabled if the unit is in Showroom Mode. NOTE: When in Sabbath Mode, evaporator thermistors still control energizing of the compressor and evaporator

fans, except there is a random fifteen (15) to twentyfive (25) second delay before power is supplied to components.

Wine Storage

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3-11

#3758410 - Revision C - May, 2014

Figure 3-17. Cooling Signal Trace (Upper Evaporator at High-Offset Temperature, Calling for Cooling)

1. Temperature at high offset, Calling for cooling

2. Temperature above low offset

5. 115VAC pulse, (+ polarity) supplied to solenoid, valve opens supplying refrigerant to upper evaporator

3. Energized

4. Energized

WINE

CONTROL

BOARD

BLACK

1 2

E2 E1 E3

MEMBRANE SWITCH

115 VOLTS 60 CYCLES

BLUE

PINK

LOW VOLTAGE

GREEN/YELLOW

NEUT

GRAY

WHITE

N.C.

BROWN

PINK

BLUE BLUE

ORANGE

N.O.

TAN

OVERLOAD PROTECTOR

WHITE

ORANGE

PINK

LIGHTS

UPPER

EVAPORATOR FAN MOTORS

LOWER

AWECO REF VALVE

680 Ω

CONDENSER FAN MOTOR

COMPRESSOR

STARTING RELAY

THERMISTER 1 LOWER CABINET

THERMISTER 2 UPPER CABINET

DISPLAY

WINE

CONTROL

BOARD

THERMISTER 3

1 2

BLUE W/WHITE

BLUE W/BLACK

BLUE W/RED

ORANGE W/RED

BLUE W/YELLOW

ORANGE W/YELLOW

WHITE W/RED

WHITE W/BLUE

GRAY W/WHITE

LOWER EVAPORATOR

THERMISTER 4 UPPER EVAPORATOR

E2 E1 E3

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Monitor and Control Off-cycle Defrost

Since High Offset (Cut-in) is governed by the evaporator temperature, the refrigeration system cannot be energized until evaporator temperatures exceed 39°F / 4°C, with a 38°F/3°C set-point, and/or exceed 66°F / 19°C, with a 65°F/18°C set-point.

Figure 3-18. Off-cycle Defrost Signal Trace

No cooling called for

Refrigeration system not energized;

evaporators defrost

DISPLAY

WINE

CONTROL

BOARD

BLACK

1 2

E2 E1 E3

MEMBRANE SWITCH

115 VOLTS 60 CYCLES

BLUE

PINK

NEUT

GREEN/YELLOW

GRAY

LOW VOLTAGE

WINE

CONTROL

BOARD

1 2

E2 E1 E3

WHITE

N.C.

BROWN

PINK

BLUE BLUE

ORANGE

N.O.

TAN

ORANGE

PINK

LIGHTS

UPPER

EVAPORATOR FAN MOTORS

LOWER

AWECO REF VALVE

680 Ω

CONDENSER FAN MOTOR

OVERLOAD PROTECTOR

WHITE

BLUE W/WHITE

BLUE W/BLACK

BLUE W/RED

ORANGE W/RED

BLUE W/YELLOW

ORANGE W/YELLOW

WHITE W/RED

WHITE W/BLUE

GRAY W/WHITE

COMPRESSOR

STARTING RELAY

THERMISTER 1 LOWER CABINET

THERMISTER 2 UPPER CABINET

THERMISTER 3 LOWER EVAPORATOR

THERMISTER 4 UPPER EVAPORATOR

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POSSIBLE WINE STORAGE ERROR INDICATORS

All wine storage units are equipped with an audio-visual temperature alarm feature, as well as low voltage wiring provisions to allow the alarm to be tied into a home security alarm system. This section explains the temperature alarm feature and the audio and/or visual error indicators that may alert a customer of a malfunction.

NOTE: If the temperature alarm feature is tied into a home security system, the connections are made using the security system’s logic. If problems occur between the wine storage unit and the security system, then a home security system technician should be contacted.

Warm Temperature Alarm

A warm temperature alarm can occur if either wine storage compartment remains warm for too long, causing several consecutive maximum run-time cycles. During a warm temperature alarm, warm temperature readings may be displayed at the control panel, the SERVICE indicator will flash (See Figure 3-19). A warm temperature alarm also cuts power to the compressor and fans, and logs error code “10” or “12” and possibly “15” (covered later in this section), depending on the compartment experiencing the warm temperature alarm. If the temperature alarm feature has been enabled by pressing the bell key on the control panel, the BELL ON indicator will also flash, and the audible alarm will beep. (See Figure 3-20)

NOTE: To clear the warm temperature alarm, the problem must be corrected, then press the UNIT ON/OFF key to switch the unit Off, then press it again to switch the unit back ON. (See Figure 3-21) Also see Clearing Error Codes, later in this section.

Figure 3-19. Warm Temperature Alarm, “SERVICE” Flashing

Figure 3-20. Warm Temperature Alarm with BELL ON Feature Enabled:

“SERVICE” and “BELL ON” Flashing with Audible Alarm Beeping

BEEP! BEEP! BEEP!

Figure 3-21. Clear Warm Temperature Alarm, Press UNIT ON/OFF Key to Off, Then ON

(Also see Clearing Error Codes, later in this section.)

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Figure 3-22. Cold Temperature Alarm, “SERVICE” Flashing

Figure 3-23. Cold Temperature Alarm with BELL ON Feature Enabled,

“SERVICE” and “BELL ON” Flashing with Audible Alarm Beeping

BEEP! BEEP! BEEP!

Figure 3-24. Clear Cold Temperature Alarm, Press UNIT ON/OFF Key to Off, Then ON

(Also see Clearing Error Codes, later in this section.)

Cold Temperature Alarm

A cold temperature alarm can occur if either wine storage compartment remains below 38°F / 3°C for too long, causing several consecutive maximum run-time cycles. During a cold temperature alarm, cold temperature readings may be displayed at the control panel, the SERVICE indicator will flash (See Figure 3-22). A cold temperature alarm also cuts power to the compressor and fans, and logs error code “11” or “13” (covered later in this section), depending on the compartment experiencing the cold temperature alarm. If the temperature alarm feature has been enabled by pressing the bell key on the control panel, the BELL ON indicator will also flash, and the audible alarm will beep. (See Figure 3-23)

NOTE: To clear the cold temperature alarm, the problem must be corrected, then press the UNIT ON/OFF key to switch the unit Off, then press it again to switch the unit back ON. (See Figure 3-24) Also see Clearing Error Codes, later in this section.

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Thermistor Malfunction Error Indicators

The diagrams below illustrating what a customer may see on the display if there is a thermistor fault, such as a short or open condition. (See Figures 3-25, 3-26, 3-27) A thermistor fault will cause power to the compressor and fans to be cut, and error codes to be logged (covered later in this section). If the temperature alarm feature has been enabled by pressing the bell key on the control panel, the BELL ON indicator will also flash, and the audible alarm will beep.

NOTE: Correcting/repairing the thermistor problem will clear the Thermistor Malfunction Error Indicator.

Figure 3-25. EE” at Right and “SERVICE” Flashing = Upper Compartment Thermistor (or its Wiring) Fault

(NOTE: Alarm will Beep and BELL ON will also Flash if Alarm is Enabled)

Figure 3-26. EE” at Left and “SERVICE” Flashing = Lower Compartment Thermistor (or its Wiring) Fault

(NOTE: Alarm will Beep and BELL ON will also Flash if Alarm is Enabled)

Figure 3-27. “SERVICE” Alone Flashing = An Evaporator Thermistor (or its Wiring) Fault

(NOTE: Alarm will Beep and BELL ON will also Flash if Alarm is Enabled)

Page 32

WINE STORAGE TROUBLESHOOTING INPUT OPERATIONS

The following few pages explain troubleshooting input operations performed at the control panel, namely: Diagnostic Mode, Manual Valve Activation Mode and Temperature Log Recall.

Diagnostic Mode

Initiating Diagnostic Mode allows the Service Technician to observe real-time temperature readings from all thermistors without temperature averaging. If errors were registered by the thermistors or the defrost system, “Error Codes” will also be displayed during diagnostic mode.

To initiate Diagnostic Mode, the unit must be ON, then press and hold either

COLDER key, and press the UNIT ON/OFF key, then release both keys (See Figure 3-28). If no error codes are registered, the left display area will

show real-time temperature of the thermistor, the right display area will show the thermistor location code, and all indicators will illuminate. Pressing either COLDER key or either WARMER key while in Diagnostic Mode will toggle

to the next or previous thermistor location, respectively. (See Figure 3-29, 3-30 and 3-31)

NOTE: If the COLDER and UNIT ON/OFF keys are pressed and held for ten (10) seconds, Manual Valve Activation Mode will be initiated (this is covered later in the section).

NOTE: Diagnostic Mode will end ten (10) seconds after the last key stroke.

Figure 3-28. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, Then the UNIT ON/OFF Key

(“UE” Indicates Upper Evaporator)

Figure 3-29. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key

(“LE” Indicates Lower Evaporator)

Figure 3-30. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key

(“UP” Indicates Upper Compartment)

Figure 3-31. Toggle Through Temperature Readings - Press Either COLDER Key or Either WARMER Key

(“LO” Indicates Lower Compartment)

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Diagnostic Mode Indicators

If “EE” is observed in the left display area during Diagnostic Mode - The thermistor, or its wiring in the location indicated by the code at right is open or shorted (See Figure 3-32).

Figure 3-32. “EE” Observed in Diagnostic Mode = Thermistor (or its wiring) Fault in Location Indicated

If “EC” is observed in the right display area during Diagnostic Mode - Numbers at left are “Error Codes” (See Figure 3-33). Error Codes indicate problems logged by specific components. If error codes are logged, they will appear before temperature readings and can be toggled through with the temperature readings as described on the previous page. (See Error Code Table below.)

Figure 3-33. Numbers at Left with “EC” at Right = Error Code (See Error Code Table Below)

Wine Storage Error Code Table

CODE INDICATION

05 Upper Cabinet Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 06 Upper Evaporator Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 07 Lower Cabinet Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 08 Lower Evaporator Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 10 Upper Cabinet Warm Temperature alarm

11 Upper Cabinet Cold Temperature alarm 12 Lower Cabinet Warm Temperature alarm 13 Lower Cabinet Cold Temperature alarm 15 Sealed System Fault (evap temperature cannot drop 5° in 5 minutes, 3 consecutive valve activations)

Clearing Error Codes

If error codes are observed in diagnostic mode, a non-flashing

SERVICE indicator will appear on the display when Diagnostic Mode ends, indicating error codes are still logged. To clear a non-flashing SERVICE indicator and the error codes, the problem must be corrected and the unit must be ON. Then, the bell key must be pressed and held for fifteen (15) seconds. The control will emit a short “beep” when the error codes is cleared. (See Figure 3-34)

Figure 3-34. Clear Error Code & Non-flashing SERVICE Indicator - Press & Hold Bell Key for 15 Seconds

Press and hold for 15 seconds

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Manual Valve Activation Mode

Manual Valve Activation Mode forces the refrigerant valve to open (feeding refrigerant to the desired evaporator), and energizes the appropriate evaporator fan motor, as well as the compressor and condenser fan motor. Once initiated, this mode lasts for five (5) minutes, during which time the evaporator temperature for that compartment is displayed at the control panel.

While in this mode, the Service Technician can observe the evaporator temperatures, and check for proper voltage readings at the activated components without having to wait for the evaporator to call for cooling.

To initiate Manual Valve Activation Mode, the unit must be ON, then press and hold the desired compartment COLDER key and UNIT ON/OFF key for ten (10) seconds (See Figure 3-35). The evaporator temperature for that compartment will be displayed in left display window and the right display window will show the thermistor location code.

NOTE: If the COLDER and UNIT ON/OFF keys are pressed and held for less then ten (10) seconds, Diagnostic Mode will be initiated. This was covered earlier in the section.

NOTE: It is possible to toggle through the other temperature readings, as in Diagnostic Mode, but in this case the temperature readings will last for five (5) minutes rather than ten (10) seconds.

NOTE: The compressor overload could prevent the compressor from energizing.

NOTE: Manual Valve Activation Mode will end five (5) minutes after initiated. It is possible to end this five (5)

minute run time and return to normal operation by switching the unit OFF then back ON. If this is done, note that the electronic control will observe a three minute minimum compressor OFF time when the unit is switched back ON. This is to protect the compressor and its electricals.

Figure 3-35. Initiating Refrigerant Valve Activation Mode:

Press and Hold Desired COLDER Key and UNIT ON/OFF Key for 10 Seconds

Press and hold for 10 seconds

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Temperature Log Recall Mode

The electronic control system is equipped with a temperature history data storage system. This system logs/stores the average temperature of each individual thermistor every four hours, along with any event indicators (explained later in this section), that may have occurred. These four-hour periods are referred to as “indexes”. Up to 64 indexes can be stored for each compartment, making it possible to observe the preceding ten days, sixteen hours of the unit’s temperature history (each index equals 4 hour temperature average; 4 hours X 64 indexes = 10 days, 16 hours). After 64 indexes are stored, each new index will bump the oldest index. Index number “1” being the most recent four-hour temperature average and index number “64” being the oldest. Accessing this temperature history data so it can be viewed on the display is accomplished by initiating Temperature Log Recall Mode.

To initiate the Temperature Log Recall Mode, the unit must be ON. Now, press and hold the desired compartment WARMER key, then press the UNIT ON/OFF key, then release both keys (See Figure 3-36). The left display window will show average compartment thermistor temperature and in the right display window will be the index number. The first index number will be “1”, indicating the most recent four-hour temperature average.

Figure 3-36. Initiating Temperature Recall Mode: Press WARMER Key and UNIT ON/OFF Key

(First Reading is Latest Average Temperature with Index #1 Displayed)

Figure 3-37. Toggle UP Through Indexes, Press WARMER Key in Multiple Key Strokes

Figure 3-38. Toggle DOWN Through Indexes, Press COLDER Key in Multiple Key Strokes

To toggle up through the indexes (from 1 to 64), press the same WARMER key in multiple key strokes (See Figure 3-37). To toggle down

through the indexes (from 64 to 1), press the corresponding COLDER key in multiple key

strokes (See Figure 3-38).

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Figure 3-39. BELL ON Illuminates - Indicates Power Failure / Interruption During that Index Period

Figure 3-40. SERVICE Illuminates - Indicates Unit was switched OFF During that Index Period by Pressing

UNIT ON/OFF Key

Figure 3-41. Double Dashes ( - - ) Displayed Instead of Temperature for Several Consecutive Index Periods -

Indicates Bad EEPROM on Control Board. Board Must be Replaced

NOTE: If the unit was in Showroom Mode during any of the 64 indexes, average temperatures will continue to be logged. No event indicator will appear with these temperatures.

NOTE: If the unit was switched OFF by pressing the UNIT ON/OFF key during any of the 64 indexes and there was still 115V AC supplied to the control board, the average temperatures will continue to be logged. This means temperatures would be expected to rise and the SERVICE indicator would be present in all indexes in which the unit was switched OFF.

NOTE: Temperature Log Recall Mode will end ten (10) seconds after the last key stroke.

Temperature Log Event Indicators

The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall Mode. (See Figures 3-39 through 3-41)

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1 4 Hours 2 8 Hours 3 12 Hours 4 16 Hours 5 20 Hours 6 24 Hours (1 Day) 7 28 Hours 8 32 Hours 9 36 Hours

10 40 Hours

11 44 Hours 12 48 Hours (2 Days) 13 52 Hours 14 56 Hours 15 60 Hours 16 64 Hours 17 68 Hours 18 72 Hours (3 Days) 19 76 Hours 20 80 Hours 21 84 Hours 22 88 Hours

23 92 Hours 24 96 Hours (4 Days) 25 100 Hours 26 104 Hours 27 108 Hours 28 112 Hours 29 116 Hours 30 120 Hours (5 Days) 31 124 Hours 32 128 Hours 33 132 Hours 34 136 Hours 35 140 Hours 36 144 Hours (6 Days) 37 148 Hours 38 152 Hours 39 156 Hours 40 160 Hours 41 164 Hours 42 168 Hours (7 Days) 43 172 Hours 44 176 Hours

WINE STORAGE TEMPERATURE LOG INDEX CHART

45 180 Hours 46 184 Hours 47 188 Hours 48 192 Hours (8 Days) 49 196 Hours 50 200 Hours 51 204 Hours 52 208 Hours 53 212 Hours 54 216 Hours (9 Days) 55 220 Hours 56 224 Hours 57 228 Hours 58 232 Hours 59 236 Hours 60 240 Hours (10 Days) 61 244 Hours 62 248 Hours 63 252 Hours 64 256 Hours (10 Days,

16 Hours)

Index # Previous Hours Time Frame

Index # Previous Hours Time Frame Index # Previous Hours Time Frame

NOTE: The chart above applies to the hours in which the control has power. Temperature history data is stored whenever the control has 115V AC supplied to it. If power to the unit is interrupted, the average temperatures for that time period are stored with the event indicator. The temperature history data is stored in a non-volatile memory, so the data is not erased by a power failure, but actual time passage during the power failure will not be shown.

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MODEL 427R-2 REFRIGERATOR SECTION ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS

The table below defines some of the basic electronic control system terminology.

Term/Component Definition / Description

Main Control Board ..……....…… The printed-circuit board (PC Board) which contains a microprocessor, relays, triacs and

electrical connections that monitor and control all functions of the appliance.

Microprocessor ……….…....…... An electrical component on the control board which receives electrical signals from

other components, processes the information, then sends electrical signals to relays and triacs on the board to open or close, switching components in the appliance ON or OFF.

Relay …………………….....……. An electrical component on the control board which switches other components in the

appliance ON or OFF when instructed to do so by the microprocessor.

Triac …………………….......…… Similar in function to the relay, the triac is a three terminal semiconductor for controlling

current in either direction.

Control Panel Assembly ….....… (Also referred to as the Control Keypad Interface), is that part of the electronic control

system where all input operations are performed (located at top front of upper drawer).

Membrane Switch ……….……... Part of the control panel assembly, which consists of the function keys.

Keys (Function Keys) ……......... The “buttons” on the Membrane Switch used for input operations: “POWER”, “ALARM”,

“ICE MAKER”, “WARMER” and “COLDER”

LCD (Liquid Crystal Display) ..... A semi-liquid substance sandwiched between glass in the display of the control panel

assembly. The molecules of this semi-liquid substance have no specific orientation. However, when electricity is applied to them, they react predictably, aligning and straightening in such a way as to control light passage.

Indicators .....……..………….…... The words, numbers and icons that appear on the display of the control panel assembly

through the use of LCD’s.

Error Codes .………...…………... The code numbers that may appear on the display of the control panel assembly when

accessing Error Code History. Error Codes are logged if the unit experienced specific problems related to electrical signals supplied by electrical components.

Temperature Units of Measure.... Temperature observed on the display of the control panel assembly may be in

Fahrenheit units of measure (°F) or Celsius units of measure (°C). A series of key strokes allows the temperature units of measure to be switched to display as either °F or °C.

Set-Point ……………...……….... The desired zone temperature, established by pressing the COLDER or WARMER

keys.

High Offset (Cut-in) ……...…...... As the zone air temperature cycles up and down, the high offset is the maximum zone

temperature that the electronic control system will allow before calling for cooling.

Low Offset (Cut-out)………........ As the zone air temperature cycles up and down, the low offset is the minimum zone air

temperature that the electronic control system will allow before interrupting cooling.

Thermistor ……………..………. (Also Referred to as a Temperature Sensor), is a resistor with which resistance changes

as the temperature around it changes. For electronic control system purposes, the microprocessor measures the resistance, then displays it as a temperature reading.

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Figure 3-42. 427R-2 Wiring Schematic

MODEL 427R-2 REFRIGERATOR SECTION ELECTRONIC CONTROL SYSTEM OVERVIEW

This page contains the wiring schematic for the refrigerator section of the model 427R-2. Input operations for the electronic control system are performed at the control panel (located inside the upper drawer), with monitoring, regulating and controlling functions taking place at the main control board. Temperatures and possible problems with the unit are shown in the control panel display. The entire electronic control system is described in greater detail on the following pages.

NOTE: For more detailed electrical diagrams refer to the wiring diagram and schematic supplied with the unit.

HIGH VOLTAGE

ORANGE

MAIN

BOARD

LOW VOLTAGE

THERMISTER

CABINET

BLUE W/ WHITE

NEUTRAL WHITE

WHITE

BLACK

PURPLE

BLUE

NEUTRAL WHITE

ORANGE

115 VOLTS 60 CYCLES

BLACK

PURPLE

RED

564

DPDT RELAY

YELLOW

ORANGE

NEUT

OVERLOAD PROTECTOR

RED

DOOR SWITCH

NEUTRAL WHITE

CONDENSER FAN MOTOR

2000 Ω

MULLION HEATER

COMPRESSOR

EVAPORATOR FAN MOTOR

TOP DRAWER LIGHTS

LOWER DRAWER LIGHTS

BLUE /W BLACK

COMPRESSOR

STARTING RELAY

DRAWER

CONTROL

WHITE

BLACK

WHITE

RED

YELLOW

ORANGE

BLUE

PURPLE

MAIN

BOARD

THERMISTER

EVAPORATOR

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Figure 3-43. Main Control Board Layout

Figure 3-44. Control Board Summary Table

MODEL 427-2 REFRIGERATOR SECTION CONTROL BOARD LAYOUT AND SUMMARY TABLE

Electrical connection points on the control board are labeled alphanumerically. These labels correspond with the alphanumeric summary table, located on the wiring diagram. By referencing the summary table, it is possible to identify which components are connected at which points on the main control board. Below is a layout diagram of the control board, and a copy of the summary table. (See Figures 3-43 & 3-44)

NOTE: All components on the control board are non-replaceable. If a problem with the control board is identified, the complete control board must be replaced.

NOTE: There is also a small PC board in the control panel assembly (Not Shown). All components in the control panel assembly are non-replaceable. If a problem with the control panel is identified, the complete control panel assembly must be replaced.

CIRCUIT

LOW VOLTAGE THERMISTOR CIRCUITS

120 VOLT CIRCUITS

TERMINAL

MAIN CONTROL BOARD SUMMARY

DESCRIPTION

WHITE

PURPLE

COLOR

BLACK

BLUE

RED

YELLOW

ORANGE

BLUE/YELLOW

BLACK WHITE

YELLOW

BLUE/WHITE

BLUE/YELLOW

RED

BLUE

GROUND FOR DISPLAY BOARD POWER SUPPLY

12VDC POWER SUPPLY FOR DISPLAY BOARD

GROUND FOR DISPLAY BOARD POWER SUPPLY

SERIAL DATE TRANSMIT

SERIAL DATA RECEIVE

12VDC POWER SUPPLY FOR DISPLAY BOARD

SENSES EVAPORATOR TEMPERATURE

SENSES REFER CABINET TEMPERATURE

SENSES IF DRAWER OPEN

POWERS COMPRESSOR AND CONDENSER FAN POWERS DEFROST CIRCUIT AND FILL TUBE HEATER

SENSES EVAPORATOR TEMPERATURE

POWERS EVAPORATOR FAN

POWER INTO BOARD

NEUTRAL INTO BOARD

FUNCTION

POWERS LIGHTS

NOT USED

DRAWER LIGHT SENSE

NOT USED

NEUTRAL

NOT USED

EVAPORATOR FAN

DEFROST HEATER

COMPRESSOR

POWER IN

LIGHTS

NOT USED

REFRIGERATOR COMPARTMENT

DISPLAY WIRING

EVAPORATOR

DISPLAY WIRING

EVAPORATOR

NOT USED NOT USED

NOT USED

DISPLAY WIRING

UPPER

EVAP EVAP

DISPLAY DISPLAY DISPLAY DISPLAY DISPLAY DISPLAY

UPR

LIGHTS

FAN 1

DEFROST

COMPRESSOR

J5-3,4

J3-3

J3-1 J3-2

J3-6

J3-5

J3-4

J2-1

J3-7

J5-1,2

J2-4

J2-3

J2-2

J4-5

J5-5,6

J5-7

J6-2

J6-1

J5-8

J4-2

J4-1

J6-3

J4-4

J4-3

J4-6

WHITE

BLACK

BLUE

PURPLE

MAIN

BOARD

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MODEL 427R-2 REFRIGERATOR SECTION CONTROL PANEL LAYOUT

NOTE: The LCD is not back lit. It will appear darker than the LED’s in the wine section.

Figure 3-45. 427R-2 Refrigerator Control Panel Layout

REFRIGERATOR SET-POINT

ADJUSTMENT KEYS

LCD

(Liquid Crystal Display)

DRAWER AJAR

ALARM ON/OFF KEY

UNIT

ON/OFF KEY

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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WHEN IN OFF MODE, 115 VOLTS AC IS STILL PRESENT AT CONTROL BOARD.

Figure 3-46. Unit ON/OFF - Press UNIT ON/OFF Key

MODEL 427R-2 REFRIGERATOR SECTION BASIC INPUT OPERATIONS

The following few pages describe the basic input operations performed at the 427R-3 control panel (switching unit ON/OFF; adjusting set-point (temperature adjustment); switching ice maker system ON/OFF and enabling and disabling door ajar alarm feature). Please note that though possible to display temperatures in Fahrenheit or Celsius, in most cases Fahrenheit readings are shown.

Unit ON/OFF

All units are shipped in OFF Mode. When power is supplied to the unit, a trace of the word “OFF” is visible on the LCD. By pressing the UNIT ON/OFF key (See Figure 3-46), power is allowed past the control board to the rest of the unit. This will be indicated by the unit lights and LCD energizing.

NOTE: Whenever the unit is switched OFF using the UNIT ON/OFF key, a trace of the word “OFF” will be visible on the LCD as long as power is supplied to the unit. This differs in Sabbath Mode, which will be covered later.

Adjusting Set-Point (Temperature Adjustments)

To adjust set-points, press WARMER or COLDER key on control panel in multiple key strokes

until the desired set-

point is achieved. One key stroke equals one degree change (Fahrenheit or Celsius). (See Figure 3-47)

NOTE: Temperature range is +34°F (+1°C) to +45°F (+7°C), with initial set-point of +38°F (+3°C).

NOTE: The initial stroke of the WARMER or COLDER keys will change previous set-point by one degree.

NOTE: The set-point will be displayed on the LCD for ten (10) seconds after the last WARMER or COLDER key

stroke. After the ten (10) second delay, the zone temperature will be displayed. As the zone temperature changes, the temperature displayed on the LCD will change by no more than one degree per minute.

Figure 3-47. Adjusting Set-Point - Press WARMER or COLDER Key In Multiple Key Strokes

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Drawer Ajar Alarm ON/OFF

When the drawer ajar alarm feature is activated, the alarm will alert a customer if a drawer is stuck open, or accidentally left open. To enable the alarm feature, press the bell ON/OFF key on the control panel. A bell icon will appear on the LCD indicating that the alarm feature is active. (See Figure 3-48) If a drawer is open for 30 seconds, the bell icon will blink and the audible alarm will beep. To disable the alarm, press the bell ON/OFF key and the bell icon will disappear, indicating the alarm feature is OFF.

Alarm is active if bell is displayed

Figure 3-48. Drawer Ajar Alarm ON/OFF - Press Alarm Bell (

) ON/OFF Key

MODEL 427R-2 REFRIGERATOR SECTION UNIQUE INPUT OPERATIONS

The following few pages describe unique input operations performed at the control panel that you would not expect a customer to perform every day. The input operations described are Temperature Unit Selection Mode, Sabbath Mode, Showroom Mode, and Manual Freezer Evaporator Defrost.

Temperature Units Selection Mode (Selecting Degrees Fahrenheit or Degrees Celsius Display)

NOTE: Temperature Units Selection must be performed within the first minute after switching the unit ON.

To convert the units of measure from Fahrenheit to a Celsius readings, press and hold the bell ON/OFF key and the UNIT ON/OFF key simultaneously for five (5) seconds, then release the keys. “ °C “ will appear on the LCD indicating temperatures will now be displayed in Celsius units of measure. (See Figure 3-49) To convert back to Fahrenheit units of measure, repeat the steps above.

NOTE: Bottom Drawer must be closed. If not closed, unit will enter Model Configuration Mode.

NOTE: Temperature Units Selection Mode will end ten (10) seconds after the last key stroke.

Figure 3-49. Converting Temperature Units of Measure (within first minute after switching unit ON)

Press and Hold the Bell ON/OFF Key and UNIT ON/OFF Key for 5 Seconds

Press and hold for 5 seconds

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Sabbath Mode

Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the LCD, lighting system and the door ajar alarm feature.

To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-50), then press and hold the UNIT ON/OFF key for ten (10) seconds, until the LCD and lights switch OFF (See Figure 3-51). To return to normal operation, press and release the UNIT ON/OFF key.

NOTE: During Sabbath Mode, the evaporator fan may function when drawers are open.

NOTE: During Sabbath Mode, the LCD is disabled and set-points cannot be changed.

Figure 3-51. After Unit is Switched OFF, Press and Hold UNIT ON/OFF Key for 10 Seconds

Figure 3-50. To Enter Sabbath Mode, Switch Unit OFF First

Press and hold for 10 seconds

Showroom Mode

Showroom Mode allow the appliance to be displayed in a showroom setting. When in Showroom Mode, all cooling functions are disabled, but the lighting system and LCD remain active.

To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-52). With the unit OFF, press and hold the WARMER and COLDER keys, then press the UNIT ON/OFF key (See Figure 3-15). To return unit to normal operating condition, repeat the steps above.

NOTE: Always recheck set-points after returning unit to normal operating condition.

NOTE: It is possible to determine if a unit is in Showroom Mode by initiating Diagnostic Mode. If “Sr” appears on

the LCD during Diagnostic Mode, the unit is in Showroom mode. This is covered later in this section.

Figure 3-53. After Unit is Switched OFF, Press and Hold the WARMER and COLDER Keys,

Then Press the UNIT ON/OFF Key

Figure 3-52. To Enter (or Exit) Showroom Mode, Switch Unit OFF First

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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FUNCTIONS OF MODEL 427R-2 REF. SECTION ELECTRONIC CONTROL SYSTEM

The following few pages explain monitoring, regulating and controlling functions of the electronic control system.

Display Zone Temperatures

Temperature signals from the compartment thermistor are monitored by the microprocessor, then displayed on the LCD. Though the zone air temperature fluctuates, average temperature is displayed (See Figure 3-54).

NOTE: If zone temperature changes, temperature display will change by one (1) degree per minute.

Figure 3-54. Display Zone Temperatures

Average temperature displayed

Figure 3-55. Signal Trace Schematic (High Voltage) of Lighting System

1. 115 Volts supplied to light system unless OFF, or in Sabbath Mode.

2. Switch position monitored for alarm and fan operation.

Supply Power to the Lighting System

Power is supplied to the lighting system through the control board when the unit is switched ON by pressing the UNIT ON/OFF key. With a drawer open, the light switch allows power to the lights. (See Figure 3-55).

NOTE: Power to the lights is monitored by the microprocessor to control the door ajar alarm feature and to help control the operation of the evaporator fan.

NOTE: When in Sabbath Mode, the lighting system is disabled. Sabbath Mode will be covered later.

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

HIGH VOLTAGE

ORANGE

MAIN

BOARD

NEUTRAL WHITE

WHITE

BLACK

PURPLE

BLUE

BLACK

PURPLE

RED

564

NEUTRAL WHITE

ORANGE

DPDT RELAY

YELLOW

115 VOLTS 60 CYCLES

ORANGE

NEUT

OVERLOAD PROTECTOR

RED

DOOR SWITCH

NEUTRAL WHITE

CONDENSER FAN MOTOR

2000 Ω

MULLION HEATER

COMPRESSOR

EVAPORATOR FAN MOTOR

TOP DRAWER LIGHTS

LOWER DRAWER LIGHTS

COMPRESSOR

STARTING RELAY

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Regulate Zone Temperature and Fan-Assisted Off-Cycle Defrost

When the thermistor in the refrigerator compartment reaches high off-set temperature, calling for cooling, the evaporator fan is energized, but the compressor is not allowed to run until the thermistor on the evaporator reaches 38°F (3°C). (See Figure 3-56)

If either drawer is opened while the evaporator fan is operating, the microprocessor will detect the power signal to the lights and cut power to the fan.

Though compartment air temperatures will fluctuate, the LCD will only display average temperature.

NOTE: If compartment temperature exceeds either high or low offset (Ex: drawer is left open), temperature display will change by one degree per minute.

NOTE: If refrigerator compartment thermistor is faulty, compressor operation defaults to 20 minutes ON, 40 minutes OFF cycling, EE appears in left of LCD, SERVICE will flash and Error Code 05 will be logged.

NOTE: If evaporator thermistor is faulty, the compressor will not energize until zone air temperature exceeds high offset by 5°F (3°C). SERVICE flashes and Error Code 06 is logged.

NOTE: When in Sabbath Mode, the refrigerator compartment thermistor still controls compressor operation, except there is a random 15 to 25 second delay before the compressor is energized.

Figure 3-56. Signal Trace - Regulate Refrigerator Zone Temperature

1. Thermistor at high off-set temp. calling for cooling.

2. No Power to lights.

5. Compressor energized.

4. Evap Thermistor above 38°F (3°C).

3. Evap fan energized.

HIGH VOLTAGE

ORANGE

NEUTRAL WHITE

WHITE

BLACK

PURPLE

MAIN BOARD

NEUTRAL WHITE

ORANGE

BLUE

BLACK

PURPLE

RED

564

DPDT RELAY

YELLOW

115 VOLTS 60 CYCLES

ORANGE

NEUT

OVERLOAD PROTECTOR

RED

DOOR SWITCH

NEUTRAL WHITE

CONDENSER FAN MOTOR

2000 Ω

MULLION HEATER

COMPRESSOR

EVAPORATOR FAN MOTOR

TOP DRAWER LIGHTS

LOWER DRAWER LIGHTS

COMPRESSOR

STARTING RELAY

LOW VOLTAGE

THERMISTER

CABINET

DRAWER

CONTROL

BLUE W/ WHITE

WHITE

BLACK

WHITE

RED

YELLOW

ORANGE

BLUE

PURPLE

MAIN

BOARD

BLUE /W BLACK

THERMISTER

EVAPORATOR

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Monitor Compressor Run Duration, Displays If Service is Needed

The microprocessor observes the state of the compressor relay to determine the length of compressor run time (See Figure 3-57). If the compressor runs 100% (4 hours), an error code is logged (EC 50), and defrost will be initiated, but SERVICE will not

flash.

If several 100% compressor run periods occur, and a drawer is not opened during the last excessive compressor run period, and the temperature in the zone is not able to fall half way between set-point and low off-set, then SERVICE will flash (See Figure 3-58).

NOTE: To clear an error code, the problem must be corrected, then the Alarm ON/OFF key pressed for fifteen (15) seconds. Failure to clear an error code will cause SERVICE to display constant.

NOTE: If the unit is ever switched OFF then immediately back ON, the compressor will not energize for at least 3 minutes. This 3 minute minimum OFF time is used to protect the compressor and its electricals.

Figure 3-58. Service Flashing if several 100% compressor run periods occurred, a drawer was not opened

during last excessive run period, and temperature is not able to fall half way between set point & low off-set.

Figure 3-57. Signal Trace Schematic - Compressor Run

Compressor relay closed, allowing 115 Volts AC to compressor. This is observe by microprocessor.

HIGH VOLTAGE

ORANGE

MAIN

BOARD

NEUTRAL WHITE

WHITE

BLACK

PURPLE

BLUE

115 VOLTS 60 CYCLES

BLACK

PURPLE

NEUT

2000 Ω

OVERLOAD PROTECTOR

RED

NEUTRAL WHITE

ORANGE

564

DPDT RELAY

YELLOW

ORANGE

RED

DOOR SWITCH

NEUTRAL WHITE

CONDENSER FAN MOTOR

MULLION HEATER

COMPRESSOR

STARTING RELAY

COMPRESSOR

EVAPORATOR FAN MOTOR

TOP DRAWER LIGHTS

LOWER DRAWER LIGHTS

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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POSSIBLE 427R-2 REFRIGERATOR SECTION ERROR INDICATORS

The diagrams on this page illustrate what a customers may see on the LCD if a problem/error exists with the unit.

NOTE: To clear indicators and error codes, problem must be corrected then press bell ON/OFF key for fifteen (15) seconds.

Figure 3-59.

“EE” Displayed and “SERVICE” Flashing = Refrigerator Compartment Thermistor (or its Wiring) Fault

Figure 3-61.

“Service” Flashing = Several 100% Run Periods, a Drawer was Not Open During Last 100% Run Period, and

Zone Temperature Not Able to Fall Half Way Between Set Point and Low Off-Set.

Figure 3-62.

“SERVICE” Steady, not Flashing = Error Codes Observed in Diagnostic Mode, but Not Cleared

Figure 3-60.

“Service” Flashing = Evaporator Thermistor (or its Wiring) Fault

Figure 3-63.

“- - ” (Double Dashes) Displayed = Model Configuration was not Performed

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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427R-2 Ref Thermistor Codes

THERMISTOR LOCATION CODE

Refrigerator Compartment r

Refrigerator Evaporator E

MODEL 427R-2 REFRIGERATOR SECTION TROUBLESHOOTING INPUT OPERATIONS

The following few pages explain troubleshooting input operations performed at the control panel. The input operations described are Diagnostic Mode, Manual Component Activation Mode and Temperature Log Recall.

Diagnostic Mode

Initiating Diagnostic Mode allows the Service Technician to observe real-time temperature readings from all thermistors without temperature averaging.

To initiate Diagnostic Mode, the unit must be ON, then press and hold the COLDER key, and the UNIT ON/OFF key, then release both keys (See Figure 3-64). At the left side of the LCD will be the real-time temperature of the thermistor, at the right will be the thermistor location code, and all icons will illuminate. Pressing the COLDER key while in Diagnostic Mode will toggle forward to the next thermistor location (See Figures 3-65), while pressing the WARMER key will toggle to the previous thermistor location.

NOTE: If the COLDER and UNIT ON/OFF keys are pressed and held for ten (10) seconds, Manual Component Activation Mode will be initiated. This is covered later in the section.

NOTE: Diagnostic Mode will end twenty (20) seconds after the last key stroke.

Figure 3-65. Toggle Through Temperature Readings - Press COLDER Key.

(“E” Indicates Evaporator)

NOTE: In this model, with only two location codes, pressing the WARMER key at this time will also toggle to the evaporator temperature reading.

Figure 3-64. Initiate Diagnostic Mode - Press COLDER and UNIT ON/OFF Keys.

(“r” Indicates Refrigerator Compartment)

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Figure 3-66. “EE” Observed in Diagnostic Mode = Thermistor Fault in Location Indicated by Code

Figure 3-67. “Sr” Observed While in Diagnostic Mode = Unit is in Showroom Mode

If “Sr” is observed during Diagnostic Mode, the unit is in Showroom Mode, which was explained earlier in this section (See Figure 3-67).

If “EC” is observed in the right display area during Diagnostic Mode, the numbers at left are “Error Codes” (See Figure 3-68). Error Codes indicate problems registered by specific components. If error codes are registered, they will appear before temperature readings and can be toggled through with the temperature readings as described on the previous page. (See Error Code Table below and instructions on clearing Error Codes on next page.)

Figure 3-68. “EC” Observed While in Diagnostic Mode = Error Code

(See table below & how to clear Error Codes on next Page)

427R-2 Refrigerator Compartment Error Code Table

CODE INDICATION

05 Refrig. cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 06 Refrig. evaporator thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s 50 Excessive Refrigerator Compressor Run

Diagnostic Mode Indicators

If “EE” is observed in left display area during Diagnostic Mode, the thermistor in that location is open or shorted, or there is a break in that thermistor’s wiring (See Figure 3-66).

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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If Error Codes are observed in Diagnostic Mode, a non-flashing SERVICE indicator will appear on the LCD when Diagnostic Mode ends, indicating error codes are still stored (See Figure 3-69). To clear a non-flashing SERVICE icon and the error codes, the problem must be corrected and the unit must be ON, then the door ajar alarm bell ON/OFF key must be pressed and held for fifteen (15) seconds. The control will emit a short “beep” when the SERVICE indicator and error codes are cleared. (See Figure 3-70)

Figure 3-69. Non-flashing SERVICE after Diagnostic Mode = Error Codes are Stored/Not Cleared

Press and hold for 15 seconds

BEEP!

Figure 3-71. Initiate Manual Component Activation Mode -

Press and Hold COLDER Key and UNIT ON/OFF Key for 10 Seconds

Manual Component Activation Mode

Manual Component Activation Mode energizes the cooling system for five (5) minutes, allowing a Service Technician to check for proper voltage readings at activated components without having to wait for the zone to call for cooling.

To initiate Manual Component Activation Mode the unit must be ON, then press and hold the COLDER key and the UNIT ON/OFF key for ten (10) seconds (See Figure 3-71). All cooling functions will begin and the compartment temperature will be displayed at left in the LCD and at right will be the thermistor location code.

NOTE: If a COLDER and the UNIT ON/OFF keys are pressed and held for less than ten (10) seconds, Diagnostic Mode will be initiated. This was covered earlier in the section.

NOTE: It is possible to toggle through the other temperature readings as in Diagnostic Mode, but in this case the temperature readings will last for five (5) minutes rather than twenty (20) seconds.

NOTE: The compressor overload could prevent the compressor from energizing.

NOTE: Manual Component Activation Mode will end five (5) minutes after it is initiated. It is possible to end this five

(5) minute run time and return to normal operation by switching the unit OFF then back ON. If this is done, note that the electronic control will observe a 3 minute minimum compressor OFF time when the unit is switched back ON. This is to protect the compressor and its electricals.

Press and hold for 10 seconds

Figure 3-70. Clear Error Code - Press & Hold Bell (

) ON/OFF Key for 15 Seconds

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

SERVICE

ICE

OFF

REFRIGERATOR

WARMERCOLDER

UNIT

ON/OFF

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Temperature Log Recall Mode

The electronic control system is equipped with a temperature history data storage system. This system logs/stores the average temperature of each individual thermistor every two hours, along with any event indicators (explained later in this section), that may have occurred. These two-hour periods are referred to as “indexes”. Up to 168 indexes can be stored for each compartment, making it possible to observe the preceding fourteen days of the unit’s temperature history (each index equals 2 hour temperature average; 2 hours X 168 indexes = 14 days). After 168 indexes are stored, each new index will bump the oldest index. Index number “1” being the most recent two-hour temperature average and index number “168” being the oldest. Accessing this temperature history data so it can be viewed on the LCD is accomplished by initiating Temperature Log Recall Mode.

There are two ways to initiate Temperature Log Recall Mode. One allows viewing of compartment temperature history only (see below), the other allows viewing of compartment temperature history and evaporator temperature history (see following page).

To View Compartment Temperature History Only - Begin with the unit ON. Now, press and hold the desired compartment WARMER key, then press the UNIT ON/OFF key, then release both keys (See Figure 3-72). The left display area on the LCD will show average compartment thermistor temperature and in the right display area will be the index number. The first index number will be “1”, indicating the most recent two-hour temperature average. The right display area will also flash the thermistor location code at 3 second intervals (See Figure 3-73).

Figure 3-72. Initiate Temperature Log Recall Mode To View Compartment Temperature History Only -

Press and Hold WARMER Key, Then Press UNIT ON/OFF Key

Figure 3-73. Thermistor Location Code Flashes Every 3 Seconds

Figure 3-74. Toggle Up Through Indexes - Press WARMER Key in Consecutive Key Strokes

Figure 3-75. Toggle Down Through Indexes - Press COLDER Key in Consecutive Key Strokes

To toggle up through the indexes (from 1 to 168), press the same WARMER key in multiple key strokes (See Figure 3-74). To toggle down through the indexes (from 168 to 1), press the corresponding COLDER key in multiple key strokes (See Figure 3-75).

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Figure 3-78. Initiate Temperature Log Recall Mode To View Temperature History -

Press and Hold UNIT ON/OFF key first, then WARMER Key

Figure 3-76. Initiate Diagnostic Mode - Press and Hold COLDER Key, then the UNIT ON/OFF Key

Figure 3-77. Toggle Through Readings - Press COLDER Key or WARMER Key Until Desired Thermistor

Temperature is Displayed

To View Compartment and Evaporator Temperature History - Begin with the unit ON and in Diagnostic Mode (See Figure 3-76). While in Diagnostic Mode, toggle through the readings until the desired thermistor temperature is displayed on the LCD (See Figure 3-77). Now, press and hold the UNIT ON/OFF key first, then the WARMER key, then release both keys (See Figure 3-78). The left display area on the LCD will show average thermistor temperature and in the right display area will be the index number “1” indicating the most recent two-hour temperature average. The right display area will also flash the thermistor location code at 3 second intervals (See Figure 3-79).

Figure 3-79. Thermistor Location Code Flashes Every 3 Seconds

Figure 3-80. Toggle Up Through Indexes - Press WARMER Key in Consecutive Key Strokes

Figure 3-81. Toggle Down Through Indexes - Press COLDER Key in Consecutive Key Strokes

To toggle up through the indexes (from 1 to 168), press the same WARMER key in multiple key strokes (See Figure 3-80). To toggle down

through the indexes (from 168 to 1), press the corresponding COLDER key in multiple key

strokes (See Figure 3-81).

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

ICE

SERVICE

OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Figure 3-83. SERVICE Illuminates - Indicates Unit was switched OFF During that Index Period by Pressing

UNIT ON/OFF Key

Figure 3-84. Bell Illuminates - Indicates Power Failure / Interruption During that Index Period

NOTE: If the unit was in Showroom Mode during any of the 168 indexes, average temperatures will continue to be logged. No event indicator will appear with these temperatures.

NOTE: If the unit was switched OFF by pressing the UNIT ON/OFF key during any of the 168 indexes and there was still power supplied to the control board, the average temperatures will continue to be logged. This means temperatures would be expected to rise and the SERVICE icon would be present in all indexes in which the unit was OFF.

NOTE: Temperature Log Recall Mode will end twenty (20) seconds after the last key stroke.

Temperature Log Event Indicators

The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall Mode. (Also see Temperature Log Index Chart on next page)

Figure 3-82. “bl” Indicates Index is “blank” - No Temperature has Been Logged Yet

(Only possible within first 14 days of unit operation, or after new control board is installed during service)

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

SERVICE

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Index= Hours Past

1 = 2 Hrs 2=4 Hrs 3=6 Hrs 4 = 8Hrs 5 = 10Hrs 6 = 12 Hrs 7 = 14 Hrs 8 = 16 Hrs

9 = 18 Hrs 10 = 20 Hrs 11 = 22 Hrs 12 = 24 Hrs (1 Day) 13 = 26 Hrs 14 = 28 Hrs 15 = 30 Hrs 16 = 32 Hrs 17 = 34 Hrs 18 = 36 Hrs 19 = 38 Hrs 20 = 40 Hrs 21 = 42 Hrs 22 = 44 Hrs 23 = 46 Hrs 24 = 48 Hrs (2 Days) 25 = 50 Hrs 26 = 52 Hrs 27 = 54 Hrs 28 = 56 Hrs 29 = 58 Hrs 30 = 60 Hrs 31 = 62 Hrs 32 = 64 Hrs 33 = 66 Hrs 34 = 68 Hrs 35 = 70 Hrs 36 = 72 Hrs (3 Days) 37 = 74 Hrs 38 = 76 Hrs 39 = 78 Hrs 40 = 80 Hrs 41 = 82 Hrs 42 = 84 Hrs

Index= Hours Past

43 = 86 Hrs 44 = 88 Hrs 45 = 90 Hrs 46 = 92 Hrs 47 = 94 Hrs 48 = 96 Hrs (4 Days) 49 = 98 Hrs 50 = 100 Hrs 51 = 102 Hrs 52 = 104 Hrs 53 = 106 Hrs 54 = 108 Hrs 55 = 110 Hrs 56 = 112 Hrs 57 = 114 Hrs 58 = 116 Hrs 59 = 118 Hrs 60 = 120 Hrs (5 Days) 61 = 122 Hrs 62 = 124 Hrs 63 = 126 Hrs 64 = 128 Hrs 65 = 130 Hrs 66 = 132 Hrs 67 = 134 Hrs 68 = 136 Hrs 69 = 138 Hrs 70 = 140 Hrs 71 = 142 Hrs 72 = 144 Hrs (6 Days) 73 = 146 Hrs 74 = 148 Hrs 75 = 150 Hrs 76 = 152 Hrs 77 = 154 Hrs 78 = 156 Hrs 79 = 158 Hrs 80 = 160 Hrs 81 = 162 Hrs 82 = 164 Hrs 83 = 166 Hrs 84 = 168 Hrs (7 Days)

Index= Hours Past

85 = 170 Hrs 86 = 172 Hrs 87 = 174 Hrs 88 = 176 Hrs 89 = 178 Hrs 90 = 180 Hrs 91 = 182 Hrs 92 = 184 Hrs 93 = 186 Hrs 94 = 188 Hrs 95 = 190 Hrs 96 = 192 Hrs (8 Days) 97 = 194 Hrs 98 = 196 Hrs

99 = 198 Hrs 100 = 200 Hrs 101 = 202 Hrs 102 = 204 Hrs 103 = 206 Hrs 104 = 208 Hrs 105 = 210 Hrs 106 = 202 Hrs 107 = 214 Hrs 108 = 216 Hrs (9 Days) 109 = 218 Hrs 110 = 220 Hrs

111 = 222 Hrs 112 = 224 Hrs 113 = 226 Hrs 114 = 228 Hrs 115 = 230 Hrs 116 = 232 Hrs 117 = 234 Hrs 118 = 236 Hrs 119 = 238 hrs 120 = 240 Hrs (10 Days) 121 = 242 Hrs 122 = 244 Hrs 123 = 246 Hrs 124 = 248 Hrs 125 = 250 Hrs 126 = 252 Hrs

Index= Hours Past

127 = 254 Hrs 128 = 256 Hrs 129 = 258 Hrs 130 = 260 Hrs 131 = 262 Hrs 132 = 264 Hrs (11 Days) 133 = 266 Hrs 134 = 268 Hrs 135 = 270 hrs 136 = 272 Hrs 137 = 274 Hrs 138 = 276 Hrs 139 = 278 Hrs 140 = 280 Hrs 141 = 282 Hrs 142 = 284 Hrs 143 = 286 Hrs 144 = 288 Hrs (12 Days) 145 = 290 Hrs 146 = 292 Hrs 147 = 294 Hrs 148 = 296 Hrs 149 = 298 Hrs 150 = 300 Hrs 151 = 302 Hrs 152 = 304 Hrs 153 = 306 Hrs 154 = 308 Hrs 155 = 310 Hrs 156 = 312 Hrs (13 Days) 157 = 314 Hrs 158 = 316 Hrs 159 = 318 Hrs 160 = 320 Hrs 161 = 322 Hrs 162 = 324 Hrs 163 = 326 hrs 164 = 328 Hrs 165 = 330 Hrs 166 = 332 Hrs 167 = 334 Hrs 168 = 336 Hrs (14 Days)

Temperature Log Index Chart

NOTE : The chart below applies to the hours in which the control has power. Temperature history data will only be stored when the control has 115V AC supplied to it. If power to the unit is interrupted, the average temperatures for that time period are stored with the event indicator. The temperature history data is stored in a non-volatile memory, so the data is not erased by a power failure, but actual time passage during the power failure will not be shown.

TEMPERATURE LOG INDEX CHART

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MODEL 427R-2 REFRIGERATOR SECTION SERVICE INPUT OPERATIONS

Model Configuration Mode

The main control board is used in several different models, so when a 427R-2 Unit is manufactured, the main control board must be configured/programmed by a series of key strokes at the control panel. This is called Model Configuration.

If a new main control board is installed during a service call, double dashes ( - - ) will appear on the LCD (See Figure 3-85). This indicates the board must be configured for the model it was installed into. This is accomplished in Model Configuration Mode, which is entered as soon as power is supplied to the unit. While in this mode, open the bottom drawer, then toggle through the model codes by pressing the WARMER or COLDER keys, until proper model code is displayed (See Figure 3-86 and 3-87, and Model Code Table below). With proper model code displayed, press UNIT ON/OFF key to lock the model configuration (See Figure 3-88).

MODEL CODE TABLE

CODE MODEL

br 700BR-3

bC 700BCI-3

27 427R-2

bF 700BFI-2

Figure 3-85. “- - ” Double Dashes when New Board Installed = Model Configuration must be Performed

Figure 3-86. Press WARMER or COLDER key to Toggle Through Model Codes

Figure 3-88. Press UNIT ON/OFF Key to Store Model Configuration

Figure 3-87. Stop When Proper Model Code is Displayed

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

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Manual Entry Model Configuration Mode

Manual Entry Model Configuration Mode allows a Service Technician to verify a main control board of the 427R refrigerator section was configured correctly, and/or to reconfigure the main control board if a mistake was made during the configuration process.

To initiate Manual Entry Model Configuration Mode the unit must be ON and the bottom drawer open

. Then, Press and hold the drawer ajar alarm bell ON/OFF key and the UNIT ON/OFF key together for 15 seconds. The unit will now be in Model Configuration Mode, with the model code of the last configuration displayed (See Figure 3-89 and Model Code Table on previous page). If needed, toggle through the model codes by pressing WARMER or COLDER keys, until appropriate model code is displayed (See Figure 3-90 and 3-91). With appropriate model code displayed, press UNIT ON/OFF key to store model configuration (See Figure 3-92).

Figure 3-89. Press Alarm and UNIT ON/OFF key to Initiate Manual Entry Model Configuration Mode

Figure 3-92. Press UNIT ON/OFF Key to Store Model Configuration

Figure 3-91. Stop When Appropriate Model Code is Displayed

Figure 3-90. Press WARMER or COLDER key to Toggle Through Model Codes

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

REFRIGERATOR

WARMERCOLDER

ON/OFF

UNIT

ON/OFF

UNIT

ON/OFF