Sub-Zero Built-In Series, BI-36UG, BI Series Assembly

Electronic Control System

3-2

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Term/Component

Definition / Description

Main Control Board ..………….… (Also referred to as the Main “Controller” Board), is 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 a relay, the triac is a three terminal semiconductor for controlling

current in either direction.

Control Panel Assembly ……..… (Also referred to as the User Interface Module, or User Interface), is that part of the

electronic control system where all manual input operations are performed.

Function Keys …….….................. The keys or buttons on the control panel assembly used for manual input operations.

The words on the function keys are: “LIGHTS”, “ICE MAKER”, “MAX ICE”, “PURE AIR”, “COLDER”, “WARMER”, “ALARM” and “POWER”.

Capacitance Touch Sensitive ..… The ability of the keys on the control panel to detect the natural capacitance of the

human body when in close proximity causing a change in electrons state or quantity which signals the electronic control to perform a function.

LCD (Liquid Crystal Display) …... A semi-liquid substance sandwiched between glass in 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. In doing so, they can be manipulated and arranged to

form the indicators that appear in the LCD.

Indicators .....………………...…... The words, numbers and icons that appear at the LCD.

Fault Codes (Error Codes) ......... The code number indicators that may appear in the LCD when accessing Fault Code

History during Fault and Sensor Recall Mode. This coded data represents current

and/or historical problematic events that specific electronic components may have expe-

rienced. Temperature Units of Measure…. Temperature readings observed at the LCD 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 detects, monitors and processes this resistance value in order to control

the appliance’s cooling functions as well as displays it as a temperature reading in the

LCD. Variable Speed Compressor …... A compressor designed to run at varying speeds depending on the temperature detect-

ed in the corresponding zone of the appliance. Variable Speed Fan Motor ...…... A fan motor that is deigned to runs at varying speeds depending on the temperature

detected in the corresponding zone, or the temperature of a specific component.

ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS

The Built-In Series utilizes an electronic control system which monitors, regulates, controls and displays a variety of functions and operations in the appliance.

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

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-3

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Figure 3-1. Electronic Control System Overview (BI-36UG Wiring Schematic)

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

BROWN

YELLOW

WHITE

REF

EVAPORATOR FAN

FREEZER

EVAPORATOR FAN

M

FLOW

METER

THERMISTER FREEZER EVAP

THERMISTER FREEZER CABINET

THERMISTER REF CABINET

THERMISTER REF EVAP

BROWN

BLACK/WHITE

WHITE/BLACK

BLUE

BROWN

BLUE

BROWN

YELLOW

RED

YELLOW/BROWN

BLUE/WHITE

BROWN

BLUE

BROWN

BLUE

WHITE

MAIN CONTROL

BOARD

16

1

17

1

P18

3

P6

P15

P16

85

P14

1164

P6

P9

P8 P7

P5

P2

P3

P1

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

L1

NEUTRAL

L1

EXERNAL DEVICE

KEYPAD

LOW VOLTAGE

HIGH VOLTAGE

ELECTRONIC CONTROL SYSTEM OVERVIEW

Figure 3-1 is the wiring schematic for the model BI-36UG showing the components of the electronic control system.

• Manual input operations are performed at the Control Panel Assembly (Keypad).

• Monitoring, regulating and controlling functions take place at the Main Control Board.

• Temperatures, icons and function/diagnostic codes are displayed in the LCD (part of Keypad).

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 appliance.

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-4

#7019014 - Revision A - October, 2010

Built-In (BI) Series

MAIN CONTROL BOARD

P18

3

P6

P15

P16

85

P14

1164

P6

P9

P8 P7

P5

P2

P3

P1

DEFROST HTR

COMP2

COMP1

MAIN LIGHTSL1NEUTRAL

L1

Figure 3-2. Control Board Layout

Figure 3-3. Control Board Summary Table

CONTROL BOARD LAYOUT AND SUMMARY TABLE

The electrical connection points on the main control board are labeled alphanumerically (See Figure 3-2). These labels correspond with the alphanumeric control board summary table, located on wiring diagrams (See Figure 3-3). By referencing the summary table, it is possible to identify which components are connected at which connection points on the main control board.

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

complete control board must be replaced.

P16-5

P16-6

P16-7

P16-8

P16-9

P18-1

P18-2

P18-3

P18-4

P18-5

P18-6

P14-5

P14-6

P14-1

P14-2

P14-3

P14-4

P15-8

P15-7

P15-6

P15-5

P15-4

P15-3

P15-1

P15-2

CIRCUIT

P16-1

P16-2

P16-3

P16-4

ICE MAKER ACCESSORIES

WATER VALVE INPUT

REFRIGERATOR DOOR INPUT

WATER FILTER RESET SWITCH

FREEZER DOOR INPUT

UNUSED

ICE MAKER

CONDENSER FAN

AIR FILTER LIGHT

UNUSED

REF BI-METAL

UNUSED

ICE MAKER WATER VALVE

120 VOLT CIRCUITS

POWER IN (L1)

UNUSED

POWER IN (L1)

NEUTRAL

UNUSED

DEFROST HEATER

MAIN LIGHTS

UNUSED

COMPRESSOR #2

COMPRESSOR #1

UNUSED

WATER VALVE

DESCRIPTION

POWERS FILL TUBE AND ACCESSORIES

---

SENSES IF REF DOOR IS OPEN

SENSES WATER VALVE ACTIVATION

SENSES WHEN DEF HEATER SHUTS OFF

SENSES IF FREEZER DOOR IS OPEN

POWERS ICE MAKER

CONDENSER FAN

AIR FILTER LIGHT

SENSES WATER FILTER

UNUSED

POWER INTO BOARD

NEUTRAL INTO BOARD

POWER INTO BOARD

POWERS MAIN LIGHTS

POWERS COMPRESSOR

POWERS REF COMPRESSOR

POWERS OFF HEATER

POWERS WATER VALVE

POWERS IM WATER VALVE

UNUSED

FUNCTION

WHITE/BLUE

ORANGE/RED

GRAY/WHITE

ORANGE/BLACK

-

PINK

WHITE/RED

RED

TAN

-

ORANGE

BLACK

-

WHITE

-

BLACK

BLUE

YELLOW

PURPLE

GRA

Y

-

COLOR

---

-

--

TAN/WHITE

EVAPORATOR FAN RETURN

CRISPER LIGHT POWER

CRISPER LIGHT RETURN

AIR FILTER FAN OUTPUT

AIR FILTER FAN RETURN

AIR FILTER LIGHT OUTPUT

AIR FILTER LIGHT RETURN

PWM DRIVE OUTPUT

EVAPORATOR FAN POWER

TACHOMETER INPUT

WATER FLOW SENSOR INPUT

FLOW METER POWER

FLOW METER RETURN

---

SENSES TEMPERATURE

---

SENSES TEMPERATURE

---

CRISPER LIGHT 12 VDC POWER

CRISPER LIGHT GROUND RETURN

AIR FILTER LIGHT

FREEZER EVAPORATOR FAN

REF EVAPORATOR FAN

EVAPORATOR FAN 12 VDC POWER

FREEZER EVAPORATOR FAN

LOW VOLTAGE CIRCUITS

REF EVAPORATOR FAN

UNUSED

FLOW METER 12V DC POWER

UNUSED

REFRIGERATOR EVAPORATOR

FREEZER CABINET

FREEZER EVAPORATOR

UNUSED

FREEZER EVAPORATOR

FREEZER CABINET

UNUSED

REFRIGERATOR EVAPORATOR

UNUSED

THERMISTER CIRCUITS

EVAPORATOR FAN GROUND RETURN

FLOW METER

P3-3

P3-7

P3-6

P3-4

P3-5

P5-9

P5-8

P5-7

P5-6

P5-5

P5-16

P5-15

P5-14

P5-13

P5-12

P5-11

P5-10

P5-4

P5-3

P5-2

P5-1

CIRCUIT

UNUSED

FLOW METER

UNUSED

REF CABINET

UNUSED

DESCRIPTION

P2-1

P2-2

P2-3

P2-4

P2-5

P2-6

P2-7

P2-8

P2-9

P2-10

P2-1

1

P2-12

P2-13

P2-14

P2-15

CIRCUIT

P2-16

P2-17

CIRCUIT

P3-2

P3-1

UNUSED

AIR FILTER FAN

UNUSED

DESCRIPTION

UNUSED

DESCRIPTION

UNUSED

FUNCTION

UNUSED

FUNCTION

UNUSED

FUNCTION

WHITE/BROWN

YELLOW/BROWN

WHITE/BLACK

-

BROWN

BLACK/WHITE

BROWN

BLUE/BLACK

BROWN

BLUE

BROWN

BLUE/WHITE

BROWN

BLUE/YELLOW

BROWN

BLUE/ORANGE

BROWN

BLUE/RED

----

---

----

COLOR

-

WHITE

RED/BLACK

YELLOW

RED

BLUE/WHITE

COLOR

-

BLUE

COLOR

UNUSED

-

UNUSED

-

S x S CONTROL BOARD SUMMARY

Main Menu

Table of Contents

Built-In Series Menu

Electronic Control System

3-5

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

CONTROL PANEL LAYOUT (AKA USER INTERFACE MODULE)

Figure 3-4 below shows the layout of the control panel assembly.

NOTES:

• Not all keys are present on all models:

- If the unit does not have a glass refrigerator door, the control panel will not have the accent LIGHTS on/off key.

- The control panel in an all-refrigerator model does not have the freezer zone COLDER and WARMER keys, nor

the ICE MAKER and MAX ICE keys.

- The control panel in an all-freezer model does not have the refrigerator zone COLDER and WARMER keys, nor the PURE AIR key.

• The control panel keys are “capacitance touch sensitive”, so even though the words “press” is used throughout this section to indicate what to do to the keys, they actually only need to be “touched” to operate.

• Whenever a key is touched the electronic control will emit a beep.

Figure 3-4. Control Panel Layout

UNIT / POWER

ON/OFF KEY

DOOR AJAR

ALARM ON/OFF

KEY

ACCENT LIGHTS

ON/OFF KEY

units with glass

doors only

ICE MAKER

SYSTEM ON/OFF

KEY

FREEZER ZONE

SET-POINT

ADJUSTMENT

KEYS

LCD

(Liquid Crystal ‘Display)

MAXIMUM ICE

PRODUCTION ON/OFF KEY

speeds ice production

by up to 40%

REFRIGERATOR ZONE

SET-POINT

ADJUSTMENT

KEYS

AIR PURIFIER

ON/OFF KEY

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-6

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-5. Power Supplied to Unit, but Unit in OFF Mode

BASIC ELECTRONIC CONTROL INPUT OPERATIONS

The following pages describe the basic input operations performed at the control panel (switching unit ON and OFF; adjusting set-point (temperature adjustment); switching ice maker system ON and OFF; activate and deactivate maximize ice production feature; enabling and disabling door ajar alarm feature; activate and deactivate air purification feature; and in models with glass doors only, switching accent lighting system ON and OFF). Please note that though possible to display temperatures in Fahrenheit or Celsius, in most cases Fahrenheit readings are shown in this manual.

Unit ON/OFF

All units are shipped in OFF Mode. When electricity is supplied to the appliance, a short power up diagnostics test is initiated where the lights are energized, “- -” (double-dashes) appear in the LCD, followed by the model code, then all components are switched OFF and the word “OFF” appears in the LCD (See Figure 3-5). By pressing the POWER key for one (1) second, electricity is allowed past the control board to the rest of the unit (See Figure 3-6), indicated by two audible beeps, the lights energizing and temperature readings appearing in the LCD.

NOTES:

• Whenever the unit is switched OFF using the POWER key, the word “OFF” will be visible in the LCD as long as there is electricity supplied to the appliance.

• Whenever the unit is switched ON using the POWER key, the model code will appear in the LCD for approximately two (2) seconds, then temperature readings will appear.

• If the unit experiences any problems during the power up diagnostic test, then the appropriate Fault Codes will be logged.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-6. Switching Unit ON (or OFF) - Press POWER Key, Actual Temperatures will be Displayed

WHEN IN “OFF” MODE, AC LINE VOLTAGE IS STILL PRESENT AT CONTROL BOARD!

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-7

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Adjusting Set-Point (Temperature Adjustment)

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

until the desired set-point is achieved (See Figure 3-7). Each key stroke equals a one degree change and is accompanied by an audible beep. When the desired set-point is reached and the keys are no longer being pressed, the setpoint will flash ON and OFF at two (2) second intervals for ten (10) seconds, then the current zone temperature will be displayed.

NOTES:

• During initial pull-down the real-time compartment temperatures will be displayed, then once set-point tempera-

tures are achieved, the temperature shown in the LCD can change by no more than one (1) degree per minute.

• The temperature range in a freezer zone is -5°F (-20°C) to +5°F (-15°C).

• The temperature range in a refrigerator zone is +34°F (+1°C) to +45°F (+7°C).

• Initial factory set-points are 0°F (-18°C) in a freezer zone and 38°F (3°C) in a refrigerator zone.

• The initial stroke of the WARMER or COLDER key will change the previous set-point by one degree.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-7. Adjusting Set-Point - Press Desired WARMER or COLDER Key In Multiple Key Strokes

Freezer Set-Point/Temperature Display

Refrigerator Set-Point/Temperature Display

Ice Maker System ON/OFF

All units are shipped with the ice maker system switched OFF. By pressing the ICE MAKER key on the control panel, power is allowed to the ice maker system and the single ice cube icon appears in the LCD (See Figure 3-8). To switch the ice maker system OFF, press the ICE MAKER key again and the single ice cube icon disappears.

NOTES:

• Power to the freezer lights is monitored to help control icemaker operation. If the freezer door is open, power to

the ice maker system is interrupted, unless the icemaker is filling with water at that time. After the door is closed, power is not allowed to the ice maker system for an additional three (3) minutes, unless the Maximum Ice Production feature has been initiated.

• The ice maker system will continue to produce ice if the ice bucket is not in the correct position. However, to help

prevent the ice maker system from filling the freezer with ice, the electronic control will not allow twenty (20) consecutive ice harvests between any two door openings.

• To allow ice to freeze fully and reduce effects of low water pressure, power to the ice maker system is interrupted

for forty-five (45) minutes after each ice harvest. This can be bypassed for service purposes by switching the icemaker system OFF, then back ON with the ICE MAKER key.

• The fill tube heater is energized 100% of the time whenever the ice maker system is ON.

• When in Sabbath Mode, the icemaker system is disabled. Sabbath Mode will be explained later.

• The ice maker system is disabled whenever the water filter or water filter plug is removed.

Figure 3-8. Switch Ice Maker System ON or OFF - Press ICE MAKER Key, Single Ice Cube Appears when ON

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Ice Maker System is ON

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-8

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Figure 3-10. Switching Door Ajar Alarm ON or OFF - Press ALARM Key, Bell Appears when Activated

Door Ajar Alarm Feature ON/OFF

All BI Series units are equipped with a door ajar alarm feature. To enable the door ajar alarm, press the ALARM key on the control panel and the bell icon will appear in the LCD indicating the alarm is enabled (See Figure 3-10). With the alarm enabled, the bell icon will flash and an audible alarm will chime at two (2) second intervals whenever a door is left open for more then thirty or sixty (30 or 60) seconds, depending on vintage. To disable the door ajar alarm, press the ALARM key again and the bell icon disappears from the LCD.

Maximize Ice Production Feature

These appliances are equipped with a feature that can boost ice production up to 40% above normal. By pressing the MAX ICE key on the control panel, the ice maker system is switched ON (if OFF); multiple ice cube icons appear in the LCD (See Figure 3-9); the freezer set-point is automatically set to -5°F (-21°C) for twenty-four (24) hours, and the freezer evaporator fan is switched to 100% run for twenty-four (24) hours, switching off only when the door is opened.

After twenty-four (24) hours, the freezer set-point reverts to the last manually input set-point, the freezer evaporator fan resumes its normal operation (cycling with the compressor); and two of the three ice cube icons disappear from the LCD, indicating normal ice production has resumed.

NOTES:

• When the maximize ice production feature is active, power to the icemaker system is NOT interrupted after ice harvest, so the icemaker will initiate a harvest as soon as the thermostat reaches 10°F (-12°C).

• Switching the unit OFF, then back ON with the POWER key, or pressing the MAX ICE key during the twenty-four (24) hour production period will switch the maximize ice production feature OFF.

• When in Sabbath Mode, the icemaker system is disabled. Sabbath Mode will be explained later.

• The ice maker system is disabled whenever the water filter or water filter plug is removed.

Figure 3-9. Maximize Ice Production Feature ON or OFF - Press MAX ICE Key,

Multiple Ice Cubes Appear when Activated

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Maximize Ice Production Feature Activated

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Alarm Feature is ON

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-9

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Accent Lighting System ON/OFF (Models Produced with Glass Doors Only)

Models produced with glass refrigerator doors are equipped with an accent lighting system in the refrigerator compartment. To energize the accent lighting system, press the LIGHTS key, and the bulb icon will appear in the LCD indicating the accent lights are enabled (See Figure 3-12). With the accent lighting system energized, the accent LED strip will be energized and stay illuminated when the door is closed. To disable the accent lights, press the LIGHTS key again.

Figure 3-12. Accent Lighting System ON or OFF - Press the LIGHT Key, Bulb Appears when Activated

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Accent Lighting System is Activated

Air Purification Feature ON/OFF

An air purification feature has been incorporated into these appliances to remove bacteria and ethylene gas (byproducts of ripening fruits and vegetables). The two main parts of this air purifier are a replaceable cartridge consisting of a small light and a filter medium, and a small low DC Voltage fan below the cartridge. The fan drives the refrigerator compartment air through the cartridge, over the light induced chemical filtering system which converts these harmful airborne food storage by-products into water vapor and carbon dioxide. Please note that this is not intended to be an “air deodorizer”, but rather a devise that helps to preserve foods for longer storage life by removing these food storage by-products.

To activate the air purification feature, press the PURE AIR key, and the Pure Air Icon appears in the LCD indicating the air purification feature has been activated (See Figure 3-11). When activated, the UV light in the filter cartridge and the fan motor under the cartridge are energized 100% of the time, unless the refrigerator door is opened or the unit is in Showroom Mode.

After approximately eight-thousand (8000) hours of use, the Pure Air Icon will flash, indicating it is time to change the air purifier cartridge. To stop the Pure Air Icon from flashing and reset the timer after the cartridge is replaced, the PURE AIR key must be pressed and held for five (5) seconds.

NOTES:

• If the unit is in Sabbath Mode, the air purifier fan will not switch OFF when the refrigerator door is opened.

• If in Showroom Mode, the air purifier will operate for thirty (30) seconds whenever the door is open or the PURE AIR key is pressed. Pressing the PURE AIR key again will force the air purifier ON for another thirty (30) seconds.

• If the light bulb in the cartridge should fail, the Pure Air Icon will flash and the appropriate fault code will be logged.

Figure 3-11. Air Purification ON or OFF - Press PURE AIR Key, Pure Air Icon Appears when ON

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Air Purifier Feature is ON

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-10

#7019014 - Revision A - October, 2010

Built-In (BI) Series

UNIQUE ELECTRONIC CONTROL INPUT OPERATIONS

The following pages illustrate unique customer input operations performed at the control panel. The input operations described are: Temperature Unit Selection Mode, Contrast Adjust Mode, Tone Adjust Mode, Showroom Mode, Sabbath Mode, Manual Zone Disable and Manual Freezer Evaporator Defrost.

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

The appliance is initially set to display temperatures in Fahrenheit temperature units of measure, indicated by the “F” at the upper right of the temperature readings in the LCD. This can be changed so Celsius units of measure are displayed by initiating Temperature Units Selection Mode.

NOTE: Temperature Units Selection Mode must be initiated within the first (1) minute after switching the unit ON.

To convert Fahrenheit (°F) temperature units of measure to Celsius (°C) within the first minute after switching the unit ON, press and hold the ALARM key and the POWER key simultaneously for five (5) seconds, then release the keys (See Figure 3-13); a “c“ will appear at the upper right of the temperature readings in the LCD, indicating that temperatures will now be displayed in Celsius units of measure. Please note that changing from Celsius temperature units of measure to Fahrenheit is the same procedure (See Figure 3-14).

NOTES:

• Do not

press and hold the POWER key first, that will simply switch the unit OFF.

• Temperature Units Selection Mode will end ten (10) seconds after the last key stroke, or the ALARM key can be pressed to exit this mode before the ten (10) seconds has elapsed.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-13. Converting Temperature Units of Measure to °C (within first minute after switching unit ON) -

Press and Hold ALARM Key and POWER Key for 5 Seconds

Press and hold for 5 seconds

Figure 3-14. Converting Temperature Units of Measure to °F (within first minute after switching unit ON) -

Press and Hold ALARM Key and POWER Key for 5 Seconds

Indicates Celsius Units of Measure

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Press and hold for 5 seconds

Indicates Fahrenheit Units of Measure

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-11

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Contrast Adjust Mode (Adjusting the LCD Contrast Level)

The contrast level of the LCD can be manually adjusted to one of five levels through Contrast Adjust mode.

NOTE: Contrast Adjust Mode can be initiated anytime af

ter the first (1) minute of switching the unit ON.

To adjust the LCD contrast level anytime after the first minute of switching the unit ON, press and hold either set of COLDER and WARMER keys and the POWER key simultaneously for five (5) seconds, then release the keys (See

Figure 3-15). The letter “C” will appear at the small digit location in the LCD indicating the control is now in Contrast

Adjust Mode and a number 1, 2, 3, 4, or 5 will appear at the right side of the LCD, indicating the last contrast level setting. Pressing a COLDER key at this time will decrease the number; pressing a WARMER key will increase the number (See Figure 3-16).

Please note that what is actually happening here is the segments and icons in the LCD are slanting at slightly different angles for each level adjustment. This means that the lower numbers will not always indicate less contrast and the higher numbers will not always indicate more contrast, as it depends on the line of sight of the user. In fact a tall person and a short person standing side-by-side during the adjustment may see the contrast level move in totally opposite directions; one seeing it increase, the other seeing it decrease.

NOTES:

• Do not

press and hold the POWER key first, that will simply switch the unit OFF.

• Contrast Adjust Mode will end ten (10) seconds after the last key stroke, or press ALARM key to exit.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-15. Adjusting LCD Contrast Level (any time after first minute of switching unit ON) -

Press and Hold COLDER, WARMER and POWER Keys for 5 Seconds

Press and hold for 5 seconds

Figure 3-16. Press COLDER or WARMER Key to Change Contrast Level

(Pressing COLDER Shown - Decrease Number)

“C” Indicates Contrast Adjust Mode

Contrast Level

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-12

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Tone Adjust Mode (Adjusting the Audible Chime Tone)

The tone of the electronic control audible chime is preset at the factory. This preset level is referred to as the “normal” tone, but it can be manually adjusted down to low, or up to high, for a total of three possible settings. This is possible through Tone Adjust Mode.

NOTE: Tone Adjust Mode can be initiated anytime af

ter the first (1) minute of switching the unit ON.

To adjust the chime tone, first initiate Contrast Adjust Mode by pressing and holding either set of COLDER and WARMER keys and the POWER key simultaneously for five (5) seconds, then release the keys (See Figure 3-17). While in Contrast Adjust Mode, press the POWER key, and the letter “S” (for “Sound”) will appear at the small digit location in the LCD indicating the control is now in Tone Adjust Mode. At the right side of the LCD will be the letters “Hi” (for High), or “nO” (for Normal), or “Lo” (for Low), indicating the last tone setting (See Figure 3-18). Pressing a COLDER key at this time will decrease the tone setting and the chime will sound in the lower/softer tone; while pressing a WARMER key will increase the tone setting and the chime will sound in the higher/louder tone (See

Figures 3-19 and 3-20).

NOTES:

• Do not

press and hold the POWER key first, that will simply switch the unit OFF.

• Tone Adjust Mode will end ten (10) seconds after the last key stroke, or press ALARM key to exit.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-17. Adjusting Chime Tone (any time after first minute of switching unit ON) - Initiate Contrast

Adjust Mode First; Press and Hold COLDER, WARMER and POWER Keys for 5 Seconds

Press and hold for 5 seconds

Figure 3-18. While in Contrast Adjust Mode, Press POWER Key to Initiate Tone Adjust Mode

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

“S” Indicates Tone Adjust Mode

Tone Level. “Hi” = High

Figure 3-19. Press COLDER Key to Decrease Tone; Press WARMER Key to Increase Tone

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Tone Level. “nO” =Norman

Figure 3-20. Press COLDER Key to Decrease Tone; Press WARMER Key to Increase Tone

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Tone Level. “nO” =Norman

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-13

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Showroom Mode

Showroom Mode was incorporated into the electronic control system so that these appliances could be displayed in a showroom setting. When in Showroom Mode all cooling, defrosting, ice making and dispensing (if applicable) functions are disabled, but the lighting system and door ajar alarm system remain operational, and the LCD will show the set-points.

To initiate Showroom Mode, the unit must first be switched OFF using the POWER key (See Figure 3-21). Then, press and hold either pair of WARMER and COLDER keys, then the POWER key, at which point three (3) beeps will be emitted and “Sh” and “r” will appear in the LCD for five (5) seconds indicating the appliance is now is showroom mode (See Figure 3-22). After the initial five seconds, set-points will appear in the LCD (See Figure 3-23).

To return the unit to normal operation, repeat the steps above.

NOTES:

• The air purifier will be energized for thirty (30) seconds any time the door is opened or the PURE AIR key is pressed.

• The lighting system will be disabled for twenty (20) minutes if the lights stay ON more than 90% of the time in any given fifteen (15) minutes, or if a compartment thermistor reports a temperature greater than ambient plus thirty (30) degrees, or if an evaporator thermistor reports a temperature greater than ambient plus twenty (20) degrees.

• For demonstration purposes, the water filter icon can be forced ON during Showroom Mode by pressing the ICE MAKER key for five (5) seconds. To switch it OFF, press the filter reset button behind the unit grille for five (5) seconds.

• Units with glass refrigerator doors contain a glass door heater, which is disabled while in Showroom mode.

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

Figure 3-22. Then Press and Hold Either Pair of WARMER and COLDER Keys, Then the POWER Key -

“Sh” and “r” appear for 5 Seconds

Figure 3-21. To Enter (or Exit) Showroom Mode, Switch Unit OFF First

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-23. Set-points Appear in LCD 5 seconds after Showroom Mode is Initiated

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-14

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Figure 3-25. Then Press and Hold POWER Key for 10 seconds

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Sabbath Mode

Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days. When Sabbath Mode is initiated the lighting systems, ice making system, dispensing system (if applicable), alarm system and the air purification feature are disabled, plus the letters “SA” and “b” will appear in the LCD.

To initiate Sabbath Mode, the unit must first be switched OFF using the POWER key (See Figure 3-24). Then, press and hold the POWER key for ten (10) seconds, at which time the alarm will chime, and “SA” and “b” will appear in the LCD (See Figure 3-25).

To return to normal operation, press the POWER key, the lights will be energized accompanied by two beeps and current zone temperature will appear in the LCD.

NOTES:

• Set-points cannot be changed and manual defrost cannot be initiated.

• The following holds true in accordance with Star-K requirements:

- Freezer defrosting functions will convert to a fixed time base sequence instead of adaptive defrosting, which is usage based.

- The compartment/zone thermistors will still detect high off-set, which is the determining factor to start the cooling process, but there will be a random fifteen (15) to twenty-five (25) second delay before cooling begins.

- The “SA” and “b” in the LCD remain energized when the door is closed.

• When Sabbath Mode is exited, the accent lights, door alarm, icemaker and air purification system will return to the ON or OFF state they were in prior to initiating Sabbath Mode.

Figure 3-24. To Enter Sabbath Mode, Switch Unit OFF First

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Press and hold for 10 seconds

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-15

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Manual Zone Disable Mode

Manual Zone Disable Mode allows a customer or Service Technician to switch one zone, or “compartment” OFF for defrosting, interior cleaning, or diagnostic purposes, while allowing the other zones to continue cooling.

To initiate Manual Zone Disable Mode, the unit must first be switched OFF using the POWER key (See Figure 3-26). Now, press and hold the WARMER key for the zone being disabled, then the POWER key, then release both keys, at which time “- -” (double-dashes) will appear in place of temperature readings for the chosen zone (See Figure 3-

27).

To return the disabled zone to operational state, repeat the steps above.

NOTE:

• If switched OFF then back ON, the electronic control stores this mode-set in non-volatile memory, so the disabled zone will remain disabled until the proper key sequence is performed to reenable the zone.

• The alarm system for the disabled zone is inactive during this mode.

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

Figure 3-27. Then Press and Desired Zone WARMER Key along with the POWER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-26. To Disable a Zone, Switch Unit OFF First by Pressing the POWER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Indicates Cooling Functions for Zone Have Been Disabled

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-16

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Manual Freezer Evaporator Defrost

Manual Freezer Evaporator Defrost was incorporated into the electronic control to assist a customer that may inadvertently leave the freezer door ajar, causing a heavily frosted evaporator, and may also be utilized by a Service Technician for servicing and diagnostics.

To initiate manual freezer evaporator defrost the unit must be ON, then press and hold the ICE MAKER key for five (5) seconds, at this time the freezer evaporator temperature will be displayed at left in the LCD with the refrigerator evaporator temperature displayed at right for five (5) seconds (See Figure 3-28), then compartment temperatures will be displayed (See Figure 3-29).

NOTES:

• Though the refrigerator evaporator temperature is also shown when manual defrost is initiated, only the freezer evaporator is affected.

• Manual Freezer Evaporator Defrost will not operate if unit is in Sabbath Mode.

• The defrost terminator will not allow power to the defrost heater if the evaporator is above 30°F (1°C).

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Figure 3-28. Initiate Manual Freezer Evaporator Defrost - Press and Hold ICE MAKER Key for 5 Seconds

Press and hold for 5 seconds

Evaporator Temperatures Displayed for 5 Seconds when Initiated

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-29. Compartment Temperatures Displayed 5 Seconds after Manual Defrost is Initiated

Main Menu

Built-In Series Menu

Table of Contents

Changing the Dispenser Lighting States

There are three possible lighting states at the dispenser assembly:

• All Lights ON (blue keys and white glasswell)

• Key Lights ON only

• All Lights OFF

Press the LIGHT key in multiple key strokes until the desired lighting state is achieved (See Figure 3-30).

NOTE: During water or ice dispensing, all lights will illuminate until dis-

pensing is complete, then lights will return to their previous state.

Dispensing Water

To operate the water dispenser, set a glass on the grille of the glasswell, then press and hold the WATER key until the desired amount of water is received (See Figure 3-31).

NOTE: Before the water dispenser is used for the first time, or after

servicing the water dispensing system, the water reservoir tank, water lines and plumbing connection must be purged of air by pressing the WATER key for approximately three (3) minutes. This will clear any air from the system, along with any foreign materials that may be present in the plumbing connection.

Dispensing Ice

The ice dispenser in these models uses a delay, or metering feature to limit the amount of ice dispensed each time the ICE key is pressed in approximately two (2) second intervals.

To dispense ice, set a glass on the grille of the glasswell, then press and hold the ICE key for approximately two (2) seconds, and the dispenser will meter out the ice, collect it in the cylinder valve directly above the glass, then turn the cylinder valve to drop the ice into the glass (See Figure 3-32).

If less ice is desired, hold the ICE key for less than two (2) seconds; if more ice is desired, hold the ICE key until the dispensing cycle repeats.

NOTE: The ice dispenser can be reprogrammed to deactivate the delayed dispense feature, which would allow the

dispenser cylinder valve and ice auger motor to remain energized continuous whenever the ICE key is pressed and held. This is referred to as Delayed Dispense Reset, and is covered on the next page.

Electronic Control System

3-17

#7019014 - Revision A - October, 2010

Built-In (BI) Series

DOOR DISPENSER CONTROL INPUT OPERATIONS (MODELS BI42SD AND BI48SD ONLY)

Models equipped with an ice and water dispenser through the refrigerator door utilize a capacitance touch control panel similar to the main control panel. Below are the input operations a customer or Service Technician may perform at the door dispenser control panel.

Figure 3-31. Dispense Water - Press

and Hold WATER Key

Figure 3-32. Water Dispense - Press

and Hold ICE Key

Figure 3-30. Choose Light State -

Press LIGHT Key in Multiple Strokes

The dispenser assembly operates on low DC voltage. Never apply AC line voltage to the dispenser components, doing so will damage the appliance.

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-18

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Locking the Dispenser

The dispenser assembly is equipped with a Lock feature which deactivates all keys on the dispenser control panel to prevent unintended ice and water dispensing while cleaning and/or to prevent small children from using the dispenser.

To activate the lock feature, press and hold the LIGHT key for approximately five (5) seconds (See Figure 3-33), until the dispenser lights flash once and the key ( ) icon illuminates red. The dispenser lights will remain in the state they were in before the lock feature was activated.

To deactivate the lock feature, press and hold the LIGHT key again for approximately five (5) seconds, until the dispenser lights flash once and the red key icon is no longer illuminated. The lights will remain in the state they were in before the lock feature was deactivated.

Delayed Dispense Reset Mode (Deactivating/Reactivating Delayed Dispense Feature)

The ice dispenser is initially set with the delayed dispense feature active. Delayed Dispense Reset Mode allows the Service Technician to deactivate (or reactivate) the ice delayed dispense feature. If deactivated, the ice dispenser cylinder valve and ice auger motor will remain energized continuous whenever the ICE key is pressed and held.

NOTE: Delayed Dispense Reset Mode must be initiated within the first (1) minute after switching the unit ON. If the

unit has been running more than one (1) minute, use the POWER key on the main control panel to switch the unit OFF then back ON.

To deactivate or reactivate this feature within the first minute after switching the unit ON:

1. Press the LIGHT key on the dispenser control panel for approxi-

mately five (5) seconds, until the dispenser lights flash once and the key ( ) icon illuminates red. (See Figure 3-34).

2. Press and hold ICE key on dispenser control panel (See Figure 3-

35).

3. While holding ICE key, press and release the LIGHT key five con-

secutive times in rapid succession (See Figure 3-36). The key icon will flash five times, then switch off indicating successful feature manipulation. This can be double-checked by pressing and holding the ICE key.

To switch back, repeat the steps above, starting with switching the unit OFF first.

ADDITIONAL DISPENSER NOTES:

• For dispensing large quantities of ice into an ice container, open the refrigerator door, place the container under the dispenser chute, then press the BULK ICE key pad located above the dispenser chute.

• If any part of the dispenser system should fail, the appropriate fault code will be logged.

• Because of the capacitance touch functionality of the dispenser keys, they must be kept clean and dry to insure proper operation.

• When in Sabbath Mode, the dispenser is disabled.

• The ice maker system and water dispensing system are disabled whenever the water filter or water filter plug is removed.

Figure 3-33. Lock Dispenser - Press

& Hold LIGHT Key for 5 Seconds

Figure 3-34. Press & Hold LIGHT

Key for 5 Seconds

Figure 3-35. Press & Hold ICE Key

Figure 3-36. Press LIGHT Key 5

Times While Holding ICE Key

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-19

#7019014 - Revision A - October, 2010

Built-In (BI) Series

FUNCTIONS OF THE ELECTRONIC CONTROL SYSTEM

The following pages explain monitoring, regulating and controlling functions of the electronic control system. In most cases signal traces on a model BI36U wiring schematic are used to show current flow for functions being explained.

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 POWER key. When a door is open, the corresponding normally closed light switch allows power to the lights in the compartment (See Figure 3-37).

NOTES:

• Power to the light is monitored by the microprocessor to control the door ajar alarm feature.

• Power to the refrigerator lights is also monitored to help control the refrigerator evaporator fan and air purifier fan operation. When the refrigerator door is open, power to the evaporator fan is interrupted.

• Power to the freezer lights is also monitored to help control the freezer evaporator fan and icemaker operation. If the freezer door (or drawer) is open, power to the freezer evaporator fan and the icemaker is interrupted.

• If in Sabbath Mode, the lighting system is disabled.

Figure 3-37. Signal Trace Schematic: Lighting System

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

TAN/ WHI TE

BROWN

YELLOW

WHITE

HIGH VOLTAGE

1. Power supplied to lighting system unless unit is switched OFF, or in Sabbath Mode.

2. Power to the lights is monitored to help control alarm, evaporator fan, air purifier fan and icemaker operation.

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-20

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Control Condenser Fan Operation

The microprocessor observes the power output to both compressors; if power is being supplied to either compressor, a signal is sent to the condenser fan relay on the control board to close, supplying power to the condenser fan motor (See Figure 3-38). If both compressors are OFF, the condenser fan will be OFF.

Figure 3-38. Signal Trace Schematic: Condenser Fan Operation

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

TAN/ WHI TE

BROWN

YELLOW

WHITE

HIGH VOLTAGE

1. Power output to compressors observed by microprocessor

2. If power is supplied to either compressor, the condenser fan is energized

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-21

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor, Regulate and Display Refrigerator Compartment Temperatures

The temperature signal from the refrigerator compartment thermistor is monitored by the microprocessor. When high offset temperature is detected, calling for cooling, a high-speed run command is sent to the refrigerator evaporator fan, switching it ON, and when the evaporator temperature climbs to 38°F (3°C) the compressor is also energized, beginning the cooling cycle. When the compartment reaches low offset temperature, the compressor and fan are switched OFF. Though compartment air temperature fluctuates from OFF and ON cycles, it is the refrigerator compartment’s “average” temperature that is displayed at the right side of the LCD. (See Figure 3-39)

NOTES:

• Refrigerator zone temperature range is +34°F (+1°C) to +45°F (+7°C).

• If average compartment temperature changes, the display will change by one degree per minute.

• If the refrigerator compartment thermistor is faulty, the refrigerator compressor defaults to 20 minutes ON, 40 minutes OFF cycling, EE appears at right in LCD, the service icon flashes and the appropriate fault code is logged.

• If the refrigerator evaporator thermistor is faulty, the refrigerator compressor will not energize until compartment air temperature exceeds high offset by 5°F (3°C); the service icon flashes and the appropriate fault code is logged.

• If in Sabbath Mode, the compartment thermistor still controls compressor operation, except that when high offset is reached, there is a random 15 to 25 second delay before the cooling cycle is started.

• The condenser fan is energized whenever a compressor is energized.

Figure 3-39. Signal Trace Schematic: Regulating Refrigerator Temperature

Average temp.

displayed at right of LCD

2. Run command sent to evaporator fan

1. High offset temperature detected

3. Ref. evaporator above 38°F (3°C)

4. Compressor energized

5. Condenser fan energized

Main Menu

Built-In Series Menu

Table of Contents

BLACK

WATER FILTER SWITCH

N.O.

RED

TAN/WHITE

P14

1164

NEUTRAL

L1 L1

MAIN LIGHTS COMP1

3

COMP2

85

DEFROST HTR

P15

P16

MAIN

P6

YELLOW

P18

CONTROL

BOARD

WHITE

GRAY

RED

PURPLE

BLUE

L1

115 VOLTS

60 CYCLES

WHITE/BLUE

TAN

PINK

P1

P2

P3

P5

P7

P9

FZ DOOR SWITCH

WHITE/BLUE

P6

P8

NEUTRAL

N.C.

YELLOW

N.C.

YELLOW

BROWN

REF DOOR SWITCH

ORANGE/BLACK

ORANGE

GRAY/WHITE

BLUE

DEFROST TERMINATOR

WHITE/BLUE

WHITE

TAN/WHITE

TAN

PINK

WHITE/RED

RED/WHITE

ORANGE/BLACK

ORANGE

FILL-TUBE HEATER

GRAY

PURPLE

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

IM

CONDENSER FAN MOTOR

M

AIR FILTER LIGHT

FREEZER LIGHTS

REF LIGHTS

CRISPER LIGHTS

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

WHITE

LOW VOLTAGE

EXERNAL DEVICE

KEYPAD

P14

1164

3

85

P15

P16

P6

P18

NEUTRAL

L1 L1

MAIN LIGHTS COMP1 COMP2

DEFROST HTR

MAIN CONTROL

BOARD

FREEZER

EVAPORATOR FAN

REF

RED

BLUE/WHITE

YELLOW/BROWN

P1

1

P2

WHITE/BLACK

17

P3

1

P5

16

P6

P8 P7

P9

BLACK/WHITE BROWN

FLOW

METER

THERMISTER FREEZER EVAP

BLUE

BROWN

THERMISTER FREEZER CABINET

BLUE

BROWN

THERMISTER REF EVAP

BLUE

BROWN

YELLOW

BLUE

WHITE

THERMISTER REF CABINET

BLUE

BROWN

EVAPORATOR FAN

M

Electronic Control System

3-22

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Additional Regulating of Refrigerator Compartment Temperatures:

Details of Controlling the Refrigerator Variable Speed Evaporator Fan Motor

The evaporator fan in the refrigerator zone uses a low DC voltage variable speed motor. During normal operation and when the door is closed, the motor is supplied with 12V DC at all times from P2-14 off of the control board, with the neutral or ground return to P2-1. When high offset temperature is detected a command is sent to the evaporator fan motor from P2-13 to run at high-speed, and the RPM is monitored via P2-16. On some models, the refrigerator evaporator fan will always run at high speed when energized, while on others a command will be sent to the fan after approximately thirty (30) seconds of high-speed operation to ramp down to low-speed. This will vary by model. If the compartment thermistor in those models where the fan speed is normally ramped down after thirty (30) seconds detects temperatures above high offset, the fan will remain at high-speed until the temperature falls below high offset, then ramp down to low-speed. And, in all models, if the refrigerator door is opened while the evaporator fan is operating, the microprocessor will detect the power signal to the lights and interrupts the 12V DC power to the fan.

(See Figure 3-40)

NOTE:

• During Sabbath Mode the lighting system is disabled and the 12V DC supplied to the evaporator fan cannot be interrupted, thus the evaporator fan may be observed running when the door is open.

• If improper RPM signals are detected from the evaporator fan, the appropriate fault code will be logged.

REF

EVAPORATOR FAN

FREEZER

EVAPORATOR FAN

M

FLOW

METER

THERMISTER FREEZER EVAP

THERMISTER FREEZER CABINET

THERMISTER REF CABINET

THERMISTER REF EVAP

BROWN

BLACK/WHITE

WHITE/BLACK

BLUE

BROWN

BLUE

BROWN

YELLOW

RED

YELLOW/BROWN

BLUE/WHITE

BROWN

BLUE

BROWN

BLUE

WHITE

MAIN CONTROL

BOARD

16

1

17

1

P18

3

P6

P15

P16

85

P14

1164

P6

P9

P8 P7

P5

P2

P3

P1

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

L1

NEUTRAL

L1

EXERNAL DEVICE

KEYPAD

LOW VOLTAGE

2. High offset temperature detected in refrigerator

1. 12VDC supplied to motor (P2-14)

3. High-speed command sent to motor (P2-13), after 30 seconds, low-speed command sent to motor (depending on model)

Motor RPM monitored at all time (P2-16)

Figure 3-40. Signal Trace Schematic: Low DC Voltage Variable Speed Refrigerator Fan Operation

Main Menu

Built-In Series Menu

Table of Contents

Electronic Control System

3-23

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Additional Regulating of Refrigerator Compartment Temperatures:

Details of Controlling the Refrigerator Drawers Temperature

The refrigerator zone contains a diverter behind the evaporator cover, below the evaporator and just above the refrigerator drawers. At the bottom of the evaporator cover is a series of holes and an air diverter near the location of the diverter. The refrigerator air is drawn from the compartment and pushed down through the evaporator, some air is diverted through the holes in the evaporator cover to the upper refrigerator compartment and some is allowed past the diverter. Since cold air sinks, this cooling method allows for the drawers to remain approximately 2°F (1°C) colder than the rest of the compartment. However, if the compartment thermistor detects temperatures below 35°F (2°C), the defrost time is extended slightly to avoid freezing temperatures in the drawer area.

NOTES:

• During Sabbath Mode the lighting system is disabled so the evaporator fan may be observed running when the door is open.

Figure 3-41. Signal Trace Schematic: Drawer Area Temperature Control

1. Fan cycles on and off during normal operation, but if temperatures fall below 35°F (2°C), fan switches off

2. Defrost is initiated, with an extended “ON” time

Main Menu

Built-In Series Menu

Table of Contents

BLACK

WATER FILTER SWITCH

N.O.

RED

TAN/WHITE

P14

1164

NEUTRAL

L1 L1

MAIN LIGHTS COMP1

3

COMP2

85

DEFROST HTR

P15

P16

MAIN

P6

YELLOW

P18

CONTROL

BOARD

WHITE

GRAY

RED

PURPLE

BLUE

L1

115 VOLTS

60 CYCLES

WHITE/BLUE

TAN

PINK

P1

P2

P3

P5

P6

P7

P8

P9

NEUTRAL

FZ DOOR SWITCH

N.C.

YELLOW

N.C.

YELLOW

BROWN

REF DOOR SWITCH

ORANGE/BLACK

ORANGE

WHITE/BLUE

GRAY/WHITE

BLUE

DEFROST TERMINATOR

WHITE

ISOLATION VALVE

660 Ω

TAN/WHITE

PINK

WHITE/RED

RED/WHITE

TAN

ORANGE/BLACK

ORANGE

WATER VALVE

160 Ω

IM

CONDENSER FAN MOTOR

M

FREEZER LIGHTS

REF LIGHTS

CRISPER LIGHTS

FILL-TUBE HEATER

WHITE/BLUE

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

REFRIGERATOR COMPRESSOR STARTING RELAY

GRAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

AIR FILTER LIGHT

WHITE

LOW VOLTAGE

P14

1164

EXERNAL DEVICE

3

85

P15

P16

P6

P18

NEUTRAL

L1 L1

MAIN LIGHTS COMP1 COMP2

DEFROST HTR

MAIN CONTROL

BOARD

P1

1

P2

WHITE/BLACK

17

P3

1

P5

16

P6

P8 P7

P9

BLACK/WHITE BROWN

FLOW

METER

THERMISTER FREEZER EVAP

BLUE

BROWN

THERMISTER FREEZER CABINET

BLUE

BROWN

THERMISTER REF EVAP

BLUE

BROWN

THERMISTER REF CABINET

BLUE

BROWN

BLUE/WHITE

YELLOW/BROWN

YELLOW

WHITE

RED

BLUE

FREEZER

EVAPORATOR FAN

M

KEYPAD

REF

M

EVAPORATOR FAN

Electronic Control System

3-24

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor and Control Refrigerator Fan-Assisted, Off-Cycle Defrost

Temperature signals from the refrigerator compartment and evaporator thermistor’s are observed by the microprocessor. During the off cycle defrost, if the refrigerator compartment temperature reaches high offset (calling for cooling) before the evaporator temperature rises to 38°F (3°C), no power will be supplied to the compressor, but the evaporator fan will be switched ON. Only after the evaporator temperature reaches 38°F (3°C) will the compressor be energized. (See Figure 3-42).

NOTES:

• if the compartment thermistor detects temperatures below 35°F (2°C), the defrost time is extended slightly to avoid freezing temperatures in the drawer area.

• If the refrigerator compartment thermistor is faulty, the refrigerator compressor defaults to 20 minutes ON, 40 minutes OFF cycling, EE appears at right in LCD, the service icon flashes and the appropriate fault code is logged.

• If the refrigerator evaporator thermistor is faulty, the refrigerator compressor will not energize until compartment air temperature exceeds high offset by 5°F (3°C); the service icon flashes and the appropriate fault code is logged.

• If in Sabbath Mode, the compartment thermistor still controls compressor operation, except that when high offset is reached, there is a random 15 to 25 second delay before the cooling cycle is started.

Figure 3-42. Signal Trace Schematic: Refrigerator Off-Cycle Defrost

2. Run command sent to evaporator fan

1. High offset temperature detected in refrigerator

3. Ref. evap.below 38°F (3°C)

4. Compressor not energized until evaporator temp climbs to 38°F (3°C)

Main Menu

Built-In Series Menu

Table of Contents

BLACK

WATER FILTER SWITCH

N.O.

RED

TAN/WHITE

P14

1164

NEUTRAL

L1 L1

MAIN LIGHTS COMP1

3

COMP2

85

DEFROST HTR

P15

P16

MAIN

P6

YELLOW

P18

CONTROL

BOARD

WHITE

GRAY

RED

PURPLE

BLUE

L1

115 VOLTS 60 CYCLES

WHITE/BLUE

TAN

PINK

P1

P2

P3

P5

P7

P9

FZ DOOR SWITCH

WHITE/BLUE

P6

P8

NEUTRAL

N.C.

YELLOW

N.C.

YELLOW

BROWN

REF DOOR SWITCH

ORANGE/BLACK

ORANGE

GRAY/WHITE

BLUE

DEFROST TERMINATOR

WHITE/BLUE

WHITE

TAN/WHITE

TAN

PINK

WHITE/RED

RED/WHITE

ORANGE/BLACK

ORANGE

FILL-TUBE HEATER

GRAY

PURPLE

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

IM

CONDENSER FAN MOTOR

M

AIR FILTER LIGHT

FREEZER LIGHTS

REF LIGHTS

CRISPER LIGHTS

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

WHITE

LOW VOLTAGE

P16

EXERNAL DEVICE

P18

P14

P15

P6

1164

NEUTRAL

L1 L1

MAIN LIGHTS

3

COMP1 COMP2

DEFROST HTR

85

P1

1

P2

17

P3

1

P5

BOARD

P9

16

P6

P8 P7

MAIN CONTROL

FREEZER

EVAPORATOR FAN

REF

RED

BLUE/WHITE

M

WHITE/BLACK BLACK/WHITE BROWN

FLOW

METER

THERMISTER FREEZER EVAP

BLUE

BROWN

THERMISTER FREEZER CABINET

BLUE

BROWN

THERMISTER REF EVAP

BLUE

BROWN

YELLOW/BROWN

YELLOW

THERMISTER REF CABINET

BLUE

BROWN

WHITE

M

BLUE

EVAPORATOR FAN

KEYPAD

Electronic Control System

3-25

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Minimize Condensation on Refrigerator Door Glass (Models Produced with Glass Doors Only)

On models with glass refrigerator doors a low DC voltage, five (5) watt braided wire heater is foamed into the door around the glass perimeter. This heater helps to minimize the formation of condensation on the glass and/or door frame by energizing in ten (10) to forty (40) second ON/OFF cycles, depending on the compartment temperatures; colder temperatures equal longer cycles. (See Figure 3-43).

To help minimize condensation further, the microprocessor detects when the refrigerator door is opened, via the light switch, and when the door closes the evaporator fan is energized for five (5) minutes, regardless of the refrigerator compressor operational state, drawing any warmer moist air away from the door glass.

(See Figure 3-43)

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATE R VALV E

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

BROWN

YELLOW

WHITE

REF

EVAPORATOR FAN

FREEZER

EVAPORATOR FAN

M

FLOW

METER

THERMISTER FREEZER EVAP

THERMISTER FREEZER CABINET

THERMISTER REF CABINET

THERMISTER REF EVAP

BROWN

BLACK/WHITE

WHITE/BLACK

BLUE

BROWN

BLUE

BROWN

YELLOW

RED

YELLOW/BROWN

BLUE/WHITE

BROWN

BLUE

BROWN

BLUE

WHITE

MAIN CONTROL

BOARD

16

1

17

1

P18

3

P6

P15

P16

85

P14

1164

P6

P9

P8 P7

P5

P2

P3

P1

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

L1

NEUTRAL

L1

EXERNAL DEVICE

KEYPAD

LOW VOLTAGE

HIGH VOLTAGE

LED

GLASS DOOR HEATER

24.9 Ω - 31.7 Ω

WHITE/PURPLE

BLUE/PURPLE

WHITE/PURPLE

BLUE/PURPLE

BLACK/YELLOW

WHITE/YELLOW

Figure 3-43. Signal Trace Schematic: Glass Door Unit Door Heater &

Evaporator Fan Operation

3. Evaporator fan energized

1. Power supplied to door heater in 10 - 40 second ON/OFF cycles at all times. Cycle length depends on compartment temperature. Colder temperatures = longer time on.

2. Signal that ref. door opened and closed

Built-In Series Menu

Table of Contents

Electronic Control System

3-26

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor, Regulate and Display Freezer Compartment Temperatures

Temperature signals from the freezer compartment thermistor are monitored by the microprocessor. When the freezer compartment thermistor detects high offset temperature, calling for cooling, the freezer compressor is cycled ON and in most cases the evaporator fan motor receives a high-speed run command, switching it ON. However, if the freezer is calling for cooling following a defrost, the evaporator fan will not be switched ON until the freezer evaporator falls to 35°F (2°C). When the compartment reaches low offset temperature, the compressor and evaporator fan are switched OFF. Though compartment air temperature fluctuates from OFF and ON cycles, it is the freezer compartment’s “average” temperature that is displayed at the left side of the LCD. (See

Figure 3-44)

NOTES:

• Freezer zone temperature range is -5°F (-21°C) to +5°F (-15°C)

• If average compartment temperature changes, the display will change by one degree per minute.

• When high offset is detected after a defrost, the freezer compressor will not be energized until after the five (5) minute time delay/dwell that follows all freezer defrosts.

• If a freezer compartment thermistor is faulty, the freezer compressor defaults to 20 minutes ON, 20 minutes OFF cycling, EE appears at left in LCD, the service icon flashes and the appropriate fault code is logged.

• If a freezer evaporator thermistor is faulty, the freezer compressor will be energized immediately after the five (5) minute dwell and the evaporator fan motor will be energized three (3) minutes later, the service icon flashes and the appropriate fault code is logged.

• If in Sabbath Mode, the compartment thermistor still controls compressor operation, except that when high offset is reached, there is a random 15 to 25 second delay before the compressor is energized.

• The condenser fan is energized whenever a compressor is energized.

Figure 3-44. Signal Trace Schematic: Regulating Freezer Temperature

2. Compressor energized

3. Condenser fan energized

Average temp.

displayed at

Left of LCD

5. Run command sent to evaporator fan

4. Freezer evaporator below 35°F (2°C)

1. Freezer’s high offset temperature detected

Built-In Series Menu

Table of Contents

HIGH VOLTAGE

BLACK

WATER FILTER SWITCH

N.O.

RED

TAN/WHITE

P14

1164

NEUTRAL

L1 L1

MAIN LIGHTS COMP1

3

COMP2

85

DEFROST HTR

P15

P16

MAIN

P6

YELLOW

P18

CONTROL

BOARD

WHITE

GRAY

RED

PURPLE

BLUE

L1

115 VOLTS 60 CYCLES

WHITE/BLUE

TAN

PINK

P1

P2

P3

P5

P6

P7

P8

P9

NEUTRAL

FZ DOOR SWITCH

N.C.

YELLOW

N.C.

YELLOW

BROWN

REF DOOR SWITCH

ORANGE/BLACK

ORANGE

WHITE/BLUE

GRAY/WHITE

BLUE

DEFROST TERMINATOR

WHITE

TAN/WHITE

TAN

PINK

WHITE/RED

RED/WHITE

ORANGE/BLACK

ORANGE

WHITE/BLUE

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

IM

CONDENSER FAN MOTOR

M

FREEZER LIGHTS

REF LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

GRAY

PURPLE

CRISPER LIGHTS

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

AIR FILTER LIGHT

WHITE

LOW VOLTAGE

EXERNAL DEVICE

KEYPAD

P14

1164

3

85

P15

P16

P6

P18

NEUTRAL

L1 L1

MAIN LIGHTS COMP1 COMP2

DEFROST HTR

MAIN CONTROL

BOARD

FREEZER

EVAPORATOR FAN

REF

RED

BLUE/WHITE

YELLOW/BROWN

P1

1

P2

WHITE/BLACK

17

P3

1

P5

16

P6

P8 P7

P9

BLACK/WHITE BROWN

FLOW

METER

THERMISTER FREEZER EVAP

BLUE

BROWN

THERMISTER FREEZER CABINET

BLUE

BROWN

THERMISTER REF EVAP

BLUE

BROWN

YELLOW

BLUE

WHITE

THERMISTER REF CABINET

BLUE

BROWN

EVAPORATOR FAN

M

Electronic Control System

3-27

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Additional Regulating of Freezer Compartment Temperatures:

Details of Controlling the Freezer Variable Speed Evaporator Fan Motor

During normal operation and when the door is closed, the variable speed evaporator fan motor in the freezer zone is supplied with 12V DC at all times from P2-14 off of the control board, with the ground or neutral return to P2-1, and to ensure proper speed commands the fan’s RPM is monitored at all times via P2-15. The fan will receive a highspeed run command from P2-12, and stay running at high-speed whenever the freezer compressor is energized, unless the call for cooling follows a defrost, in which case the evaporator fan will not be switched ON until the freezer evaporator is 35°F (2°C) or colder. If the freezer door is opened while the evaporator fan is operating, the microprocessor will detect the power signal to the lights and interrupt the 12V DC power to the fan. And, if the maximum ice production feature is activated, which forces the freezer evaporator fan ON 100% for twenty-four (24) hours, the fan speed will then be ramped down to low-speed during the compressor off cycles. (See Figure 3-45)

NOTE:

• During Sabbath Mode the lighting system is disabled and the 12V DC supplied to the evaporator fan cannot be interrupted, so the evaporator fan may be observed running when the door is open.

• If improper RPM signals are detected from the evaporator fan, the appropriate fault code will be logged.

REF

EVAPORATOR FAN

FREEZER

EVAPORATOR FAN

M

FLOW

METER

THERMISTER FREEZER EVAP

THERMISTER FREEZER CABINET

THERMISTER REF CABINET

THERMISTER REF EVAP

BROWN

BLACK/WHITE

WHITE/BLACK

BLUE

BROWN

BLUE

BROWN

YELLOW

RED

YELLOW/BROWN

BLUE/WHITE

BROWN

BLUE

BROWN

BLUE

WHITE

MAIN CONTROL

BOARD

16

1

17

1

P18

3

P6

P15

P16

85

P14

1164

P6

P9

P8 P7

P5

P2

P3

P1

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

L1

NEUTRAL

L1

EXERNAL DEVICE

KEYPAD

LOW VOLTAGE

1. 12VDC supplied to motor (P2-14)

4. High-speed command sent to motor (P2-12), switching to low-speed command only when in Max Ice Mode and compressor is in offcycle

Motor RPM monitored at all time (P2-15)

Figure 3-45. Signal Trace Schematic: Low DC Voltage Variable Speed Freezer Fan Operation

3. Freezer evaporator below 35°F (2°C)

2. Freezer’s high offset temperature detected, switching compressor & condenser fan ON

Built-In Series Menu

Table of Contents

Electronic Control System

3-28

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor and Control “Adaptive Defrost” of Freezer Evaporator

Initially, the freezer compressor cycle-runs for six (6) hours, then the compressor and evaporator fan are switched OFF and the control board defrost relay is closed, supplying power to the defrost heater.

With “Adaptive Defrost”, the length of time the defrost heater stays on to open the defrost terminator bimetal is observed by the microprocessor via the grey w/white stripe wire to P18-6. This length of time is used to calculate the number of hours before the next defrost (defrost interval). If the heater is energized for a shorter time period then the microprocessor estimated based on predetermined algorithms, the microprocessor increases the next defrost interval. If the heater stays on for a longer time period, the microprocessor decreases the next defrost interval. (See Figure 3-46) This is an ongoing process whereby the defrost heater ON-time and the defrost interval will vary by unit use.

NOTES:

• A five (5) minute time delay/dwell follows all defrosts, before the compressor is energized.

• Minimum defrost interval = 6 hours of compressor run time; Maximum defrost interval = 80 hours of compressor run time; Maximum defrost duration = 30 minutes, plus 5 minute dwell.

• If the defrost sensing line to P18-6 is open, defrost operation defaults to 25 minute defrost heater ON-time / 6 hour build-time, and the appropriate fault code is logged.

• During defrost, the displayed freezer temperature is locked.

Figure 3-46. Signal Trace Schematic: Freezer Adaptive Defrost

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

TAN/ WHI TE

BROWN

YELLOW

WHITE

HIGH VOLTAGE

1. Defrost heater Energized

2. Elapsed time from heater ON state to terminator opening is monitored via Grey/White Wire to P18-6, then interval before next defrost is determined and set

Built-In Series Menu

Table of Contents

After the water filter is replaced, the filter reset button behind the unit grille must be pressed for five (5) seconds to clear the filter icon from the LCD and reset the counters to zero (See

Figure 3-47).

NOTES:

• If a filter bypass plug is installed, the counters must be disabled by pressing the reset button five (5) times in seven (7) seconds.

• No water will flow to the ice maker and water dispensing systems if the water filter or bypass plug are removed.

Electronic Control System

3-29

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor Water Valve Flow Meter, Regulate Water Fill Volume and Display when New Water Filter is Needed

The microprocessor observes the volumetric flow through the water valves via a low DC voltage signal from the flow meter, with every one revolution of the turbine inside the flow meter equaling 0.02 oz (0.5 ml) (See Figure 3-47).

• For an icemaker fill, the electronic control instructs the valve to remain open long enough to deliver approximately

3.5 oz (105 ml) of water. This timeframe will vary depending on the inlet water pressure and how long the filter has been in use.

• For those units with a water dispenser, the electronic control supplies power to the water valve whenever the WATER key is pressed.

In both cases, the electronic control keeps track of the amount of water delivered to the filter via the flow meter. When it has calculated that two-hundred and thirty-five (235) gallons of water have passed through the filter, or if eight-thousand seven-hundred and sixty (8760) hours have elapsed since the last time the filter reset button was pressed, then the water filter icon in the LCD will illuminate (See Figure

3-47A), indicating it is time to

change the filter.

Figure 3-47. Signal Trace Schematic: Flow Meter Monitored; Filter Reset

Figure 3-47A.

Water Filter Icon

Appears = Time to

Replace Water Filter

After 1 year (235 gallons) press

reset button for 5 seconds

Water flow meter observed by microprocessor for 235

gallons

Built-In Series Menu

Table of Contents

HIGH VOLTAGE

BLACK

WATER FILTER SWITCH

N.O.

RED

TAN/WHITE

P14

1164

NEUTRAL

L1 L1

MAIN LIGHTS COMP1

3

COMP2

85

DEFROST HTR

P15

P16

MAIN

P6

YELLOW

P18

CONTROL

BOARD

WHITE

GRAY

RED

PURPLE

BLUE

L1

115 VOLTS

60 CYCLES

NEUTRAL

WHITE/BLUE

TAN

PINK

FZ DOOR SWITCH

P1

P2

P3

P5

P6

P7

P8

P9

N.C.

YELLOW

N.C.

YELLOW

BROWN

REF DOOR SWITCH

ORANGE/BLACK

ORANGE

WHITE/BLUE

GRAY/WHITE

BLUE

DEFROST TERMINATOR

WHITE/BLUE

WHITE

TAN/WHITE

TAN

PINK

WHITE/RED

RED/WHITE

ORANGE/BLACK

ORANGE

FILL-TUBE HEATER

GRAY

PURPLE

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

IM

CONDENSER FAN MOTOR

M

AIR FILTER LIGHT

FREEZER LIGHTS

REF LIGHTS

CRISPER LIGHTS

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

WHITE

LOW VOLTAGE

EXERNAL DEVICE

KEYPAD

P14

1164

3

85

P15

P16

P6

P18

NEUTRAL

L1 L1

MAIN LIGHTS COMP1 COMP2

DEFROST HTR

MAIN CONTROL

BOARD

FREEZER

EVAPORATOR FAN

REF

RED

BLUE/WHITE

YELLOW/BROWN

P1

1

P2

WHITE/BLACK

17

P3

1

P5

16

P6

P8 P7

P9

FLOW

BLACK/WHITE BROWN

METER

THERMISTER FREEZER EVAP

BLUE

BROWN

THERMISTER FREEZER CABINET

BLUE

BROWN

THERMISTER REF EVAP

BLUE

BROWN

YELLOW

BLUE

WHITE

THERMISTER REF CABINET

BLUE

BROWN

EVAPORATOR FAN

M

Electronic Control System

3-30

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor Icemaker System and Display If Service is Needed

During an ice production cycle, the microprocessor observes the power supplied to the water valve solenoids. If a solenoid is energized for more than thirty-five (35) seconds, power to the icemaker system is disabled for twenty-four (24) hours (See Figure 3-48), and the appropriate fault code is logged. If this happens five consecutive times, the ICE icon and service icon in the LCD will flash (See Figure 3-49), and the icemaker system will remain disabled, to include the ICE MAKER key, until the problem is corrected and the fault indicator and fault code is cleared.

NOTES:

• To clear the icemaker fault indicator and reactivate the icemaker system, the problem must be corrected, then the ALARM key must be pressed for fifteen (15) seconds to clear the fault code.

• To allow ice to freeze fully and reduce effects of low water pressure, power to the ice maker system is interrupted for forty-five (45) minutes after each ice harvest. This can be bypassed for service purposes by switching the icemaker system OFF, then back ON with the ICE MAKER key.

• Power to the freezer lights is monitored to help control icemaker operation. If the freezer door is open, power to the ice maker system is interrupted, unless the icemaker is filling with water at that time. After the door is closed, power is not allowed to the ice maker system for an additional three (3) minutes, unless the Maximum Ice Production feature has been initiated.

• When in Sabbath Mode, the ice maker system is disabled.

• The ice maker system is disabled whenever the water filter or water filter plug is removed.

Figure 3-48. Signal Trace Schematic: Icemaker Electrical System

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

TAN/ WHI TE

BROWN

YELLOW

WHITE

HIGH VOLTAGE

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Figure 3-49. Service Icon and Ice Cube Icon Flashing = Service Needed on Ice Maker System

Power to valve solenoids monitored; if supplied longer than 35 seconds, power to icemaker system is disabled for 24 hours; if this happens 5 consecutive times, power is disabled until problem is fixed

Built-In Series Menu

Table of Contents

Electronic Control System

3-31

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Monitor Compressor Run Duration, Displays If Service is Needed

The microprocessor observes the changing state of the compressor relays on the control board to determine the length of compressor run time (See Figure 3-50). Other than during initial pull down, if a compressor runs 100% (Freezer = 6 hours / Refrigerator = 4 hours), five consecutive times, a fault code is logged, defrost is initiated, and the service icon will flash. If approximately twenty-four (24) hours worth of 100% run periods occur, and the compartment temperature does not fall to at least the average of the set point and low off-set temperature (and the door is not opened during the last run period), then the service icon will flash and the alarm will chime (See Figure 3-51).

NOTES:

• If the unit is ever switched OFF then back ON, compressors will not energize for at least three (3) minutes. This minimum OFF time is used to protect the compressor and its electricals.

• To clear fault indicators and Fault Codes the problem must be corrected, then press the ALARM key for fifteen (15) seconds. Failure to clear Fault Codes will result in the highest priority fault indicator reappearing in the LCD when the unit is switched back ON.

Figure 3-50. Signal Trace Schematic: Monitoring Compressor Run Times

115 VOLTS

60 CYCLES

L1

NEUTRAL

N.O.

WATER FILTER SWITCH

P16

MAIN

CONTROL

BOARD

P1

3

P14

L1 L1

NEUTRAL

1164

P2

P15

85

P3

P6

P5

P6

P9

P8

P7

P18

DEFROST HTR

COMP2

COMP1

MAIN LIGHTS

N.C.

FZ DOOR SWITCH

REF DOOR SWITCH

ISOLATION VALVE

660 Ω

WATER VALVE

160 Ω

M

IM

CONDENSER FAN MOTOR

CRISPER LIGHTS

REF LIGHTS

AIR FILTER LIGHT

FREEZER LIGHTS

FILL-TUBE HEATER

2300-2900 Ω

DEF HEATER

27.9-30.9 Ω

DEFROST TERMINATOR

REFRIGERATOR COMPRESSOR STARTING RELAY

FREEZER COMPRESSOR STARTING RELAY

PURPLE

WHITE

WHITE/BLUE

BLUE

WHITE

PURPLE

GRAY

RED

PINK

YELLOW

BLACK

RED

WHITE/BLUE

TAN

BLUE

ORANGE

YELLOW

ORANGE/BLACK

GRAY/WHITE

ORANGE/BLACK

WHITE

RED/WHITE

WHITE/RED

TAN

PINK

GRAY

ORANGE

WHITE

TAN/WHITE

TAN/ WHI TE

BROWN

YELLOW

WHITE

HIGH VOLTAGE

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-51. the Service Icon Flashing & Alarm Chiming = Service Needed Immediately

Power to compressors monitored; fault code logged if 100% run observed and service icon appears; if several 100% runs occur, service icon flashes and alarm chimes

Built-In Series Menu

Table of Contents

Electronic Control System

3-32

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-52. Pure Air Icon Flashing = Air Purifier Components need to be Replaced.

After Replacing Filter Cartridge, Press PURE AIR Key for 5 Seconds to Reset Timer

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Figure 3-53. Water Filter Icon Appears = Water Filter need to be Replaced.

After Replacing Filter, Press Filter Reset Button behind the Unit Grille for 5 Seconds to Reset Counters

POSSIBLE INSTRUCTION AND ERROR/FAULT INDICATORS

The diagrams on these pages illustrate what a customer may see in the LCD if the appliance needs attention.

NOTES:

• To clear instruction indicators (See Figures 3-52 & 3-53) and restart the appropriate timer, the instructions must be followed, then press the appropriate key or reset button as described.

• For thermistor faults described below (See Figures 3-54 & 3-55): Thermistors can be tested by submersing them in a glass of ice water (~32°F / 0°C) for approximately five (5) minutes, then checking for 30,000 to 33,000 ohms.

• To clear fault indicators and Fault Codes (See Figures 3-54 to 3-59) the problem must be corrected, then press the ALARM key for fifteen (15) seconds (See Figure 3-60). Failure to clear Fault Codes will result in the highest priority fault indicator reappearing in the LCD when the unit is switched back ON.

• If a customer needs to suspend a Major Fault Code for twenty-four (24) hours, while waiting for a Service Technician, they could press and hold ALARM then POWER keys simultaneously for less than 5 seconds. Doing this, as apposed to clearing the Fault Cold as described above, would maintain all Fault Code history data for the Service Technician.

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Figure 3-54. “EE” at Left with Service Icon Flashing = Freezer Compartment Thermistor (or its Wiring) Fault

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-55. Service Icon Flashing and “EE” at Right = Refrig. Compartment Thermistor (or its wiring) Fault

Built-In Series Menu

Table of Contents

Electronic Control System

3-33

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-59. Service Icon Flashing with Alarm Chiming = Major Fault Code Logged (Immediate Action

Required; Temperature Problems and/or Possible Appliance Damage &/or Flood Warning - Water through

Flow Meter but No Call for Water)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-60. To Clear Fault Codes After Correcting the Problem, Press ALARM Key for 15 Seconds -

“C” and “FC” appear for 5 Seconds indicating Fault Codes have been Cleared

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Figure 3-56. Service Icon and Ice Cube Icon Flashing = Solenoid Energized 35 Seconds and Ice Maker

System was Disabled for 24 Hours, 5 Consecutive Times; now Ice Maker System Disabled until Repaired

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-58. Service Icon Flashing, but Alarm Not Chiming (Usually with Normal Temperatures Displayed) =

Major Fault Code Logged (Threatening Temp. Problems), and/or Fault Codes not Cleared after Viewing

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-57. Service Icon Steady (Not Flashing) with Normal Temperatures Displayed = Minor Fault Code

Logged (Not Threatening Temperature Problems), and/or Fault Codes not Cleared after Viewing

Press and hold for 15 seconds

Indicates Cleared Fault Codes

Built-In Series Menu

Table of Contents

Electronic Control System

3-34

#7019014 - Revision A - October, 2010

Built-In (BI) Series

SERVICE INPUT OPERATIONS

The following few pages explain service input operations that can be performed at the control panel: Diagnostic Mode, Fault Code Recall Mode, Temperature Log Recall Mode, Model Configuration Mode, Manual Zone Component Activation Mode and Self-Test Mode.

Diagnostic Mode

Diagnostic Mode allows the Service Technician to observe current, real-time temperature readings from all thermistors without weighted averaging or offsets. Diagnostic Mode is also used as an interim step to get into other modes.

NOTE: The key strokes to initiate Diagnostic Mode and Fault Code Recall Mode are the same. If the electronic

control has recorded Fault Codes, then the key strokes listed below will initiate Fault Code Recall Mode, which will be explained later. If Fault Codes are observed but the desire is to view current temperature readings from the thermistors, then press the ALARM key; this will shift the electronic control system into Diagnostic Mode.

To initiate Diagnostic Mode, the unit must be ON, then press and hold either COLDER key, and press the POWER key, then release both keys. If there are no Fault Codes logged, then at left in the LCD will be current, real-time temperature readings of a thermistor; at right will be the thermistor location code, and all icons in the LCD will illuminate (See Figure 3-61). Pressing a COLDER or WARMER key while in Diagnostic Mode will toggle to the next or previous thermistor location, respectively (See Figure 3-62 below and Thermistor Location Code Table with Additional Diagnostic Mode Notes on following page)

NOTES:

• Do not

press and hold the COLDER and POWER keys for more than ten (10) seconds, as this will initiate Manual

Zone Component Activation Mode, which is covered later in the section.

• Diagnostic Mode will end twenty (20) seconds after the last key stroke, or press the ALARM key to exit this mode.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-61. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, Then the POWER Key -

(“r” = Refrigerator Compartment)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-62. Press WARMER (or COLDER) Key to Toggle Through the Temperatures -

(“rE” = Refrigerator Evaporator)

Temperature Temperature Units of Measure

Location Code

Built-In Series Menu

Table of Contents

Electronic Control System

3-35

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-63. If Initiating Diagnostic Mode and “SH” and “r” appears in LCD, unit is in Show Room Mode

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-64. If “EE” appears at Left in LCD During Diagnostic Mode, That Thermistor or its wiring is faulty

ADDITIONAL DIAGNOSTIC MODE NOTES:

• If “Sh” and “r” appear in the LCD when initiating Diagnostic Mode (See Figure 3-63), the unit is in Showroom Mode which was covered earlier in this section.

• If “EE” is observed in the left display area during Diagnostic Mode, the thermistor in that location is open, shorted, unstable, or not present (See Figure 3-64).

• There is currently no thermistor in the drawers, so “EE” will appear at left of the “dr” (See Figure 3-65).

• There is currently no thermistors on the condenser, so “EE” will appear at left of the “Cn” (See Figure 3-66).

• The ambient thermistor is part of the control board. It is not a separate component.

Refrigerator Compartment

Refrigerator Evaporator

Freezer Compartment

Freezer Evaporator

Refrigerator Drawers (Not Active)

Condenser (Not Active)

CODE LOCATION

THERMISTOR LOCATION CODE TABLE

Ambient

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-65. Currently no Thermistor in Drawer Area, so “EE” will Appear to the Left of the “dr”

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-66. Currently no Thermistor on Condenser, so “EE” will Appear to the Left of the “Cn”

Built-In Series Menu

Table of Contents

Electronic Control System

3-36

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Fault Code Recall Mode

Fault Code Recall Mode allows a Service Technician to view historical data that the electronic control system may have stored if specific components experienced or detected problems. This data can be displayed in a code format in the LCD in this mode, with the data storage device capable of storing up to fifty (50) fault codes. If more then fifty (50) fault codes are detected, each new fault code will bump the oldest fault code.

NOTE: As mentioned on the preceding page, The key strokes to initiate Fault Code Recall Mode and Diagnostic

Mode are the same. If the electronic control has not recorded any Fault Codes, then the key strokes listed below will initiate Diagnostic Mode, which was explained on a preceding page.

To initiate Fault Code Recall Mode, the unit must be ON, then press and hold either COLDER key, and press the POWER key, then release both keys (See Figure 3-67). If any Fault Codes were logged they will be displayed in the LCD at this time. To see if multiple Fault Codes are stored, press a WARMER or COLDER key to toggle through the codes (See Figure Figure 3-68 and the Fault Code Table with LCD Correlation Diagram on following pages).

NOTE:

• Do not

press and hold the COLDER and POWER keys for more than ten (10) seconds, as this will initiate Manual

Zone Component Activation Mode, which is covered later in the section.

• Fault Code Recall Mode will end ten (10) seconds after the last key stroke.

• To clear fault codes the problem must be corrected, then press the ALARM key for fifteen (15) seconds. Failure to do this will cause the Service icon to display steady.

• If Fault Codes are present but the desire is to view current temperature readings from the thermistors (Diagnostic Mode), then press the ALARM key; this will shift the electronic control system into Diagnostic Mode.

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-67. Initiate Fault Code Recall Mode - Press and Hold Either COLDER Key, Then the POWER Key

(Example Shown: “30 8 30”, Service Wrench Flashing and Alarm Chiming = Water Valve not Opened but

Water Detected Passing Through)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-68. Press WARMER (or COLDER) Key to Toggle Through Fault Codes

(Example Shown: “10 2 02” with Service Wrench Steady = Freezer Cabinet Thermistor Unstable)

(See the Fault Code Table with LCD Correlation Diagram on following page)

(See the Fault Code Troubleshooting Tables in Troubleshooting Guide section of this manual)

Built-In Series Menu

Table of Contents

Electronic Control System

3-37

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

FAULT CODE TABLE WITH LCD CORRELATION DIAGRAM ( PAGE 1 of 2 )

10 15 20 30 35 40 44 45 50 60 90 95 98

Thermistor Faults Relay Faults Defrost Heater Faults Ice/Water/Accessory Faults Fan Faults Runtime Faults Glass Heater Faults Lighting Faults Flow Meter Load/Component Faults Control Faults Diagnostics Power Faults

0 1 2 3 4 5 6 7 8 9 A d F

H

L

r

U

Misc Refrigerator Freezer Condenser Defrost System Control System Compressors Ambient Icemaker Dispenser Air Purifier TC Drawer Freezer Evaporator High Voltage System Lighting Refrigerator Evaporator Water Systems

00 01 02 05 06 07 09 10

11 12 20 21 22 25 30 33 34 35 36 37 38 39 40 42 43 44 45 46

Open Short/Closed Unstable Miswire normal temps Miswire overheat Bad Ohms Too Warm/Large Temp Differential Second Device Open Second Device Short/Closed Second Device Unstable Third Device Open Third Device Short/Closed Third Device Unstable Diagnostics Failure Valve Enabled Too Long Speed Setting too Low Speed Setting too High Fan speed error Fan current too low Fan current too high Fan Power Output Fault DC Fan Output Fault Excessive runtime Primary Heater Fault Secondary Heater Fault Door Heater Output Fault Burned out Light No Position/State Detect

NOTE: These Columns are repeated on next page

NOTE: This Column is continued

on next page

Built-In Series Menu

Table of Contents

Electronic Control System

3-38

#7019014 - Revision A - October, 2010

Built-In (BI) Series

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

FAULT CODE TABLE WITH LCD CORRELATION DIAGRAM ( PAGE 2 of 2 )

10 15 20 30 35 40 44 45 50 60 90 95 98

Thermistor Faults Relay Faults Defrost Heater Faults Ice/Water/Accessory Faults Fan Faults Runtime Faults Glass Heater Faults Lighting Faults Flow Meter Load/Component Faults Control Faults Diagnostics Power Faults

0 1 2 3 4 5 6 7 8 9

A

d

F

H

L

r

U

Misc Refrigerator Freezer Condenser Defrost System Control System Compressors Ambient Icemaker Dispenser Air Purifier TC Drawer Freezer Evaporator High Voltage System Lighting Refrigerator Evaporator Water Systems

50 55 56 60 65 66 70 71 72 73 74 75 80 81 82 83 84 85 86 87 90 92 93 95 96 97 98 99

Open Heater Triac Open Triac Short No Load/Load Open Stuck at Dispenser Water Valve Out Stuck at Ice Water Valve Out Bad Flash Write Flash Initialized Flash Memory Bad Invalid Log Fault Checksum Invalid E2 Checksum Invalid Model E2 Checksum No Communication Communications Time-out Partial Communications Bad Micro Communication Micro Initialization Display Failure Too Slow No Flow Framing Errors Excessive Collisions Data Overrun FMEA Error Calibration or Low Signal Error Quantum SPI Brownout Other

NOTE: These Columns are repeated from last page

NOTE: This Column is

continued from last page

Built-In Series Menu

Table of Contents

Electronic Control System

3-39

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Temperature Log Recall Mode

The electronic control system logs/stores the average temperature of each individual thermistor every thirty (30) minutes, along with any possible event indicators. These thirty-minute periods are referred to as “indexes”. Up to twohundred forty (240) indexes can be stored for each thermistor, which is five (5) days of temperature history. After two-hundred forty (240) indexes are stored, each new index bumps the oldest index, with index number “240” being the oldest thirty minute temperature average. Accessing and viewing this temperature history data in the LCD is accomplished by initiating Temperature Log Recall Mode.

To initiate Temperature Log Recall Mode, begin with the unit ON and in Diagnostic Mode (See Figure 3-69).

NOTE: If Fault Codes have been logged the control will enter Fault Code Recall Mode instead of Diagnostic Mode.

If this happens press the ALARM key to shift the electronic control system into Diagnostic Mode.

While in Diagnostic Mode, use a WARMER or COLDER key to toggle through the readings until the desired thermistor location code is displayed (See Figure 3-70) (r = Refrigerator, rE = Refrigerator Evaporator, F = Freezer, FE = Freezer Evaporator).

NOTE: If “dr”, “Cn” or “A”, appear, continue to toggle past these codes as it is not possible to to enter Temperature

Log Recall Mode for these thermistors.

With the desired thermistor location code displayed, press and hold the POWER key first, then a WARMER key, then release both keys (See Figure 3-71); in the LCD will be a temperature reading at left and the Index number at right.

(Continued on next page)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-70. Toggle Thru Readings - Press WARMER (or COLDER) Key Until Desired Code is Displayed

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-69. Initiate Diagnostic Mode - Press and Hold the POWER Key then Either COLDER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-71. With Desired Thermistor Code Displayed, Press & Hold POWER Key First, then WARMER Key

Temperature

1st Index Digit

2nd and 3rd Index Digits

Built-In Series Menu

Table of Contents

Electronic Control System

3-40

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Along with the temperature and index number, a thermistor location code will flash at three (3) second intervals in the first index digit area (“r” = Refrigerator, “r” followed by “E” = Refrigerator Evaporator, “F” = Freezer, “F” followed by “E” = Freezer Evaporator - See Figure 3-72 and 3-73).

Pressing the WARMER key (See Figure 3-74) while in Temperature Log Recall Mode will toggle up

through the

indexes, from 1 to 240, while pressing the COLDER key (See Figure 3-75) will toggle down through the indexes.

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

Figure 3-73. Thermistor Location Code Flashes at 3 second intervals (F then E = Freezer Evaporator)

Figure 3-72. Thermistor Location Code Flashes at 3 second intervals (F then E = Freezer Evaporator)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Location Code Flashes Every 3 Seconds (F=Freezer)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Location Code Flashes Every 3 Seconds (E=Evaporator)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-74. Toggle UP Through Indexes - Press and Hold WARMER Key, or Press in Multiple Key Strokes

Index 002

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-75. Toggle Down Through Indexes - Press and Hold COLDER Key, or Press in Multiple Key Strokes

Index 240

Built-In Series Menu

Table of Contents

Electronic Control System

3-41

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Temperature Log NOTES:

• If Manual Compartment Disable Mode has been activated during any of the indexes, average temperatures will continue to be logged, but no event indicator will appear with these temperatures.

• If the unit was in Showroom Mode during any of the indexes, average temperatures will continue to be logged, but no event indicator will appear with these temperatures.

• If the unit was switched OFF by pressing the POWER key during any of the indexes and there was still power supplied to the unit, 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.

• Temperature Log Recall Mode will end 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. (See Figures 3-76 through 3-78)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-76. “bL” Indicates Index is “BLANK

” = No Temperature Logged Yet

(Only possible within first 5 days of unit operation, or after new control board is installed during service)

Index of occurrence (220 in this example)

“bL” = Blank

Figure 3-77. SERVICE Icon Illuminates = Unit was switched OFF During Index by Pressing POWER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Index of occurrence (82 in this example)

Indicates POWER key pressed, switching unit OFF

Figure 3-78. Bell Illuminates = Indicates Power Failure / Interruption During that Index Period

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Index of occurrence (51 in this example)

Indicates power interruption

Built-In Series Menu

Table of Contents

Electronic Control System

3-42

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Model Configuration Mode

The main control board is used in several different models, so it must be configured/programmed for the specific model it is used in through a series of key strokes at the control panel. This is called Model Configuration.

If a new control board is installed during a service call, a default configuration is automatically entered represented by “dE” and “FL” in the LCD during the short power up diagnostics test after power is supplied to the unit (See

Figure 3-79). This indicates Model Configuration Mode must be initiated so the new new board can be configured

for the model it was installed into.

Model Configuration Mode also allows a Service Technician to verify that the control board was configured correctly, and/or to reconfigure the control board if configured incorrectly.

To initiate Model Configuration Mode the unit must be ON and in Diagnostic Mode (See Figure 3-80).

NOTE: If Fault Codes have been logged the control will enter Fault Code Recall Mode instead of Diagnostic Mode.

If this happens press the ALARM key to shift the electronic control system into Diagnostic Mode.

While in Diagnostic Mode, press and hold the POWER key for ten (10) seconds, until a model code appears in the LCD (See Figure 81 and Model Code Table on following page). Now, toggle through the model codes by pressing a WARMER or COLDER key in multiple key strokes until the appropriate model code is displayed (See Figures 3-82 and 3-83). With the appropriate model code displayed, press the POWER key and “Pr” and “g” appear, indicating a question as to whether this is the desired model code to be programmed (See Figure 3-84). If the code is correct, press the POWER key again within five (5) seconds to store the model configuration (See Figure 3-85).

NOTES:

• The second press of the POWER key must

occur within five (5) seconds of the first.

• If no keys are pressed within any thirty (30) seconds period after initiating Model Configuration Mode, the mode will automatically be exited, and the unit will revert back to the last model configured, or to the default setting.

• If the ALARM key is pressed, or if either pair of WARMER and COLDER keys are pressed during Model Configuration Mode, the mode will be exited.

Figure 3-79. When New Board is Installed and Power Supplied “dE” and “FL” = Default Configuration;

Model Configuration must be Performed

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-80. Initiate Diagnostic Mode First - Press and Hold Either COLDER Key, Then the POWER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-81. Initiate Model Configuration Mode - While in Diagnostic Mode,

Press and Hold POWER Key for 10 seconds - “dE” and “FL” = Default Configuration

Press and hold for 10 seconds

Built-In Series Menu

Table of Contents

NOTES:

• The main control board is used in domestic and international units.

• When scrolling through model codes, please note that they do not appear in model numerical order.

• Follow instructions that accompany service control board as the codes do change according to serial number as well as domestic vs. domestic models.

Electronic Control System

3-43

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Figure 3-82. Toggle Through Model Codes with Multiple Key Strokes of COLDER or WARMER keys

Until Correct Model Code is Displayed (“00” and “1” = 36” Over -Under)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-83. Stop When Correct Model Code is Displayed (“00” and “3” = 48” Side-by-Side)

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-84. Press POWER Key when Correct Code is Displayed, “Pr” and “g” Appear on LCD

Asking if the Code Displayed Should be Programmed/Stored

PURE AIRWARMERCOLDER WARMERCOLDER ALARM POWERMAX ICEICE MAKERLIGHTS

Figure 3-85. Press POWER Key Again - Configuration is Complete,

Model Code is Displayed for 3 Seconds (“00” and “3” = 48” Side-by-Side), then Temperatures are Displayed

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Built-In Series Menu

Table of Contents

Electronic Control System

3-44

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Manual Component Activation Mode

Manual Component Activation Mode allows a Service Technician to activate and toggle through various unit functions while observing the corresponding function codes and associated temperatures in the LCD. This mode also allows for voltage checks at the activated components without having to wait for the zone to call for cooling.

To initiate Manual Component Activation Mode, the unit must first be ON and in Diagnostic Mode (See Figure 3-86).

NOTE: If Fault Codes have been logged the control will enter Fault Code Recall Mode instead of Diagnostic Mode.

If this happens press the ALARM key to shift the electronic control system into Diagnostic Mode.

While in Diagnostic Mode, and keeping in mind that the components can be activated in only one zone at a time, press and hold the desired zone’s COLDER key and the POWER key for ten (10) seconds (See Figures 3-87 and 3-

88), at which time all cooling functions will stop; the letters “OF” and “F” will appear in the LCD, and all icons in the

LCD will illuminate.

The chosen zone’s components can now be forced to ON for five (5) minutes, or back to the OFF states using the WARMER or COLDER keys, with the WARMER key activating the next step (component), while the COLDER key would activate a previous step (component). (See Manual Component Activation Tables on next page).

NOTE:

• All temperatures displayed are current, real-time temperatures without weighted averaging or offsets.

• Pressing any key (other than the POWER or ALARM) during this mode restarts the five (5) minute timer.

• Pressing the POWER key during this mode forces the control back into Diagnostic Mode.

• Pressing the ALARM key will exit the mode, and return the unit to normal operation.

Figure 3-88. Initiate Manual Component Activation Mode for Freezer Components -

While in Diagnostic Mode, Press and Hold Freezer COLDER and POWER for ten (10) seconds,

Then Press Freezer WARMER or COLDER Key to Activate Components as Indicated in Table

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Press and hold for 10 seconds

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-86. Initiate Diagnostic Mode First - Press and Hold Either COLDER Key, Then the POWER Key

Figure 3-87. Initiate Manual Component Activation Mode for Refrigerator Components -

While in Diagnostic Mode, Press and Hold Refrigerator COLDER and POWER for ten (10) seconds,

Then Press Refrigerator WARMER or COLDER Key to Activate Components as Indicated in Table

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Press and hold for 10 seconds

Built-In Series Menu

Table of Contents

Electronic Control System

3-45

#7019014 - Revision A - October, 2010

Built-In (BI) Series

TABLE NOTES:

The LCD will show Celsius temperatures during this mode if the appliance has been set to display Celsius units of measure.

“-84

F

” or “-64c” will appear in place of temperature if the thermistor is open or missing. Which one appears depends

on whether the appliance is set to display Fahrenheit or Celsius units of measure.

STEP FUNCTIONS / COMPONENT(S)

1

3

2

4

5

6

7

8

9

10

LCD VIEW COMMENTS

All Components OFF; All Lights OFF OFF Displayed; All Lights OFF

Ref Compressor ON Zone Temp & r Displayed; Actual temps will vary

Ref Evaporator Fan ON (Comp stays ON)

Alternate Evap Temp & rE / Zone Temp & rC Display at 5 second intervals; Actual temps will vary

Condenser Fan ON (Comp/Evap fan stays ON) Zone Temp & Cd Displayed; Actual temps will vary

Drawer Fan(s) ON (Comp/Evap/Cond fan switch OFF)

Alternate -84 (-64 if set Celsius) & dr / Evap Temp & rE Display at 5 second intervals; Actual temps will vary

Drawer Fan(s) OFF OFF Displayed; All Lights ON

Air Purifier Light & Fan ON Ar & Ft Displayed

Everything OFF (Light relay ON/Lights OFF) OFF Displayed; All Lights OFF

Main Lights ON LS & On Displayed; Main Lights ON; All else OFF

Accent/Display Lights ON AC & Lt Displayed; All Lights ON

Normal ON Mode Press POWER to exit, or let time outEXIT

STEP FUNCTIONS / COMPONENT(S)

1

3

2

4

5

6

7

8

LCD VIEW COMMENTS

All Components OFF; All Lights OFF OFF Displayed; All Lights OFF

Fre Compressor ON Zone Temp & F Displayed; Actual temps will vary

Fre Evap Fan ON (Comp stays ON)

Alternate Evap Temp & FE / Zone Temp & FC Display at 5 second intervals; Actual temps will vary

Condenser Fan ON (Comp/Evap fan stays ON) Zone Temp & Cd Displayed; Actual temps will vary

Defrost Heater ON Evap Temp & Et Displayed; Actual temps will vary

Defrost Heater ON; Evap Fan ON Evap Temp & dE Displayed; Actual temps will vary

All Components OFF; All Lights OFF OFF Displayed; All Lights OFF

All Lights ON LS & On Displayed; All Lights ON

Normal ON Mode Press POWER to exit, or let time outEXIT

REFRIGERATOR ZONE MANUAL COMPONENT ACTIVATION TABLE

FREEZER ZONE MANUAL COMPONENT ACTIVATION TABLE

Built-In Series Menu

Table of Contents

Electronic Control System

3-46

#7019014 - Revision A - October, 2010

Built-In (BI) Series

Self-Test Mode

Initiating Self Test Mode forces the electronic control to cycle through all relays and triacs, switching components ON and OFF, and check for correct feedback information from various electrical components. Then, if a relay or triac fails to function properly, or if incorrect feedback is received, the appropriate fault codes will be logged.

To initiate Self Test Mode, the unit must be ON and in Diagnostic Mode (See Figure 3-89).

NOTE: If Fault Codes have been logged the control will enter Fault Code Recall Mode instead of Diagnostic Mode.

If this happens press the ALARM key to shift the electronic control system into Diagnostic Mode.

Then, while in Diagnostic mode press and hold either set of COLDER and WARMER keys, then the POWER key, then release all three keys (See Figures 3-90). Self Test Mode will last approximately five (5) seconds, during which “tE St” will be displayed in the LCD. At the end of the self test, the current compartment temperature readings will appear in the LCD.

When Self Test Mode does end, it will be necessary to initiate Fault Code Recall Mode in order to view any fault codes that may have been logged during the self test (See Figure 3-91).

Figure 3-90. Initiate Self-Test Mode -

While in Diagnostic Mode, Press either set of COLDER and WARMER Keys and the POWER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-89. Initiate Diagnostic Mode First - Press and Hold Either COLDER Key, Then the POWER Key

PURE AIR WARMER COLDER WARMER COLDER ALARM POWER MAX ICE ICE MAKER LIGHTS

Figure 3-91. When Self Test Mode Ends, Initiate Fault Code Recall Mode -

Press and Hold Either COLDER Key, Then the POWER Key

(Example Shown: “15 L 01” = Main Lights Relay Stuck Closed. No Voltage to Lights)

“tE St” = Self Test Mode is Active

Main Menu

Built-In Series Menu

Table of Contents