Sub-Zero Wolf Integrated Series User manual

Controls & Operation 11
subzero.com 800.222.7820
Integrated Drawer
Service Manual

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Electronic Control Info. INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS)
ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS
The appliances described in this manual utilize 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.
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 control-
ling current in either direction.
User Interface Module (UIM) .. (a.k.a. Control Panel or Key Pad), is that part of the electronic control system where
all manual input operations are performed, also where all icons, words and codes
are displayed
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 icons, numbers and words that appear at the LCD
Fault Codes (Error Codes) ........The code number indicators that appear on the LCD during diagnostic mode This
coded data represents current and/or historical problematic events that specific
electronic components may have experienced.
Display Units of Measure……... Temperatures displayed 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 dis-
play units of measure to be switched to read as either °F or °C.
Set-Point ……………………….. The 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....….......................... (a.k.a. a Temperature sensor) A resistor with which resistance changes as the tem-
perature around it changes. For electronic control system purposes, the micro-
processor measures this resistance and displays it as a temperature reading at the
LCD.

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INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS) Electronic Control Info.
Figure 2-1. ID-30C/I and ID-3 Electronic Control System Schematic
N.O.
HIGH VOLTAGE
LOW VOLTAGE
115 VOLTS
60 CYCLES
L1 NEUTRAL
WHITE
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
TAN/WHITE
ICEMAKER WATER VALVE 160 Ω
MAIN CONTROL
BOARD
(DOT DENOTES PIN #1 LOCATION)
ST-1 ST-3 ST-4
4321
12345
ST-2
321
123456
ST-5
ST-12 ST-8 ST-9
ST-7 ST-10
ST-13
ST-11
UPPER
DRAWER SWITCH
BLACK
BLUE
PURPLE
GRAY/WHITE
GRAY/WHITE
BLUE
GRY/WHT
TAN
PINK
TAN/WHITE
ICEMAKER
DEF HEATER 30-26 Ω
FILL TUBE HEATER 1924-2261 Ω
FRE COMPRESSOR
STARTING RELAY
DEFROST
TERMINATOR
WHITE
TAN
REF EVAP FAN
CONDENSER FAN
M
M
RED
YLW/ORN
BLUE/ORN
RED
YELLOW
BLUE
BLACK/RED
MAIN CONTROL
BOARD
(DOT DENOTES PIN #1 LOCATION)
ST-1 ST-3 ST-4
ST-2
ST-5
ST-12 ST-8 ST-9
ST-7 ST-10
ST-13
ST-11
ST-6
ST-6
1
2
3
4
5
6
7
8
9
10
1
1234567
2 4 6 8 10 12
1 3 5 7 9 11
LOWER
DRAWER SWITCH
BLACK/ORANGE
YLLW/ORN RED/ORN
N.O.
UPR DRWR
LED
LWR DRWR
LED
THERMISTOR REF CAB
THERMISTOR FRE CAB
THERMISTOR FRE EVAP
THERMISTOR CONDENSER
BLUE/PURPLE
BROWN
BROWN
BROWN
BLUE
BROWN
BLUE/ORANGE
BLUE/BLACK
BLK/YLW
YLW/BLK
RED/WHITE
YLW/RED
YLW/WHITE
BROWN/WHITE
KEYPAD
YELLOW/WHITE
YELLOW/RED
YELLOW/BLACK
YELLOW/BROWN
REF AIR DUCT
BAFFLE
BASIC ELECTRONIC CONTROL SYSTEM
The electronic control system consists of high voltage and low voltage (See Figure 2-1 for High voltage Wire
Schematic and Low Voltage Wire Schematic for the models ID-30C/I and ID-36C/I).
Input operations for the electronic control system are performed at the control panel (UIM), with monitoring, regulat-
ing and controlling taking place at the control board. Temperatures and possible problems with the unit are dis-
played at the UIM depending on input commands given. The electronic control system is described in greater detail
on the following pages.

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Electronic Control Info. INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS)
MAIN CONTROL BOARD
(DOT DENOTES
PIN #1 LOCATION)
ST-1 ST-3 ST-4
ST-6
ST-5 ST-7 ST-10
ST-13
ST-11
ST-9
ST-8
ST-12
ST-2
Figure 2-2. Control Board Layout
Figure 2-3. Control Board Summary Table (ID-30C/I and ID-36C/I Summary Table Shown)
CONTROL BOARD LAYOUT AND SUMMARY TABLE
The electrical connection points on the control board are labeled alphanumerically. These labels correspond with
the alphanumeric control board summary table, located on the wiring diagrams. By referencing the summary table,
it is possible to identify which components are connected at which connection points on the control board. Below is
a layout diagram of the control board, and a copy of a summary table. (See Figures 2-2 and 2-3)
NOTE: All components on the control board are non-replaceable. If a problem with the control board is identified,
the complete control board must be replaced.
120 VOLT CIRCUIT
LOW VOLTAGE CIRCUITS
LOW VOLTAGE CIRCUITS CONT.
THERMISTOR CIRCUITS
ID-C CONTROL BOARD SUMMARY
CIRCUIT DESCRIPTION FUNCTION COLOR CIRCUIT DESCRIPTION
POWER INTO BOARD
POWER FRE COMPRESSOR
UNUSED
POWER DEF HEATER
BLACK
PURPLE
--
BLUE
POWER IN (L1)
FRE COMPRESSOR
UNUSED
DEF HEATER
ICEMAKER
UNUSED
UNUSED
UNUSED
ICEMAKER WATER VALVE
POWER ICEMAKER
UNUSED
UNUSED
UNUSED
POWERS IM WATER VALVES
PINK
--
--
--
TAN/WHITE
LINE POWER SUPPLY
NEUTRAL
EARTH GROUND
POWER INTO BOARD
NEUTRAL INTO BOARD
GROUND
BLACK
WHITE
GREEN/YELLOW
ST1-1
ST1-2
ST1-3
ST1-4
FUNCTION COLOR
DRAWER SWITCH INPUT
UNUSED
UNUSED
UNUSED
YELLOW/BLACK
--
--
--
DRAWER SWITCH
UNUSED
UNUSED
UNUSED
ST9-1
ST9-2
ST9-3
ST9-4
UNUSED
UNUSED
UNUSED
UNUSED
--
--
--
--
UNUSED
UNUSED
UNUSED
UNUSED
ST9-5
ST9-6
ST9-7
ST9-8
GROUND BLACK/YELLOWDOOR SWITCH GROUNDST9-9
UNUSED
UNUSED
UNUSED
UIM POWER
--
--
--
RED/WHITE
UNUSED
UNUSED
UNUSED
UIM 12 V POWER
ST10-1
ST10-2
ST10-3
ST10-4
UIM CAN_H
UIM CAN_L
UIM RETURN
YELLOW/RED
YELLOW/WHITE
BROWN/WHITE
UIM CAN BUS
UIM CAN BUS
UIM GROUND RETURN
ST10-5
ST10-6
ST10-7
UNUSED
UNUSED
UNUSED
UNUSED
--
--
--
--
UNUSED
UNUSED
UNUSED
UNUSED
ST11-1
ST11-2
ST11-3
ST11-4
POWER OUT HALF BRIDGE 1
POWER OUT HALF BRIDGE 2
POWER OUT HALF BRIDGE 3
GRAY/WHITE
GRAY/RED
GRAY/BLACK
BAFFLE
BAFFLE
BAFFLE
ST11-5
ST11-6
ST11-7
POWER OUT HALF BRIDGE 4 GRAY/BROWNBAFFLEST11-8
UNUSED
UNUSED
UNUSED
--
--
--
UNUSED
UNUSED
UNUSED
ST12-1
ST12-2
ST12-3
UNUSED --UNUSEDST12-4
ST2-1
ST2-2
ST2-3
ST3-1
ST3-2
ST3-3
ST3-4
ST3-5
NEUTRAL NEUTRAL INTO BOARD WHITE
ST4-1
WATER VALVE INPUT SENSES WATER VALVE ACTIVATION TAN
ST4-2
NEUTRAL NEUTRAL INTO BOARD WHITE
ST4-3
DEF BI-METAL SENSES WHEN DEF HEATER SHUTS OFF GRAY/WHITE
ST4-4
UNUSED UNUSED --
ST4-5
UNUSED UNUSED --
ST4-6
UNUSED UNUSED --
ST7-1
UNUSED UNUSED --
ST7-2
UNUSED UNUSED --
ST7-3
UNUSED UNUSED --
ST7-4
EVAP FAN 12 VDC POWER EVAP FAN POWER RED
ST7-5
REF EVAP FAN VAR. SPEED CONTROL OUT YELLOW
ST7-6
REF EVAP FAN TACH INPUT BLUE
ST7-7
EVAP FAN GROUND RETURN EVAP FAN RETURN BLACK/RED
ST7-8
UNUSED UNUSED --
ST7-9
UNUSED UNUSED --
ST7-10
CONDENSER FAN VAR. SPEED CONTROL OUT YELLOW/ORANGEST7-11
CONDENSER FAN TACH INPUT BLUE/ORANGE
ST7-12
DRAWER LED DRAWER LED POWER RED/ORANGE
ST8-1
DRAWER LED DRAWER LED PWM YELLOW/ORANGE
ST8-2
DRAWER LED DRAWER LED GROUND BLACK/ORANGE
ST8-3
UNUSED UNUSED --ST8-4
UNUSED UNUSED -- ST8-5
UNUSED UNUSED --
ST8-6
SENSES TEMPERATURE
SENSES TMEPERATURE
UNUSED
BLUE/ORANGE
BROWN
--
REF CABINET
REF CABINET
UNUSED
ST6-1
ST6-7
ST6-2
UNUSED --UNUSEDST6-8
SENSES TEMPERATURE
SENSES TEMPERATURE
SENSES TEMPERATURE
BLUE
BROWN
BLUE/BLACK
FRE CABINET
FRE CABINET
FRE EVAPORATOR
ST6-3
ST6-9
ST6-4
SENSES TEMPERATURE BROWNFRE EVAPORATORST6-10
SENSES TEMPERATURE
SENSES TEMPERATURE
UNUSED
BLUE/PURPLE
BROWN
--
CONDENSER
CONDENSER
UNUSED
ST6-5
ST6-11
ST6-6
UNUSED --UNUSEDST6-12

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INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS) Electronic Control Info.
UIM (User Interface Module)
Please note that there are many possible UIM model configurations and many facets to, or “screens” on, the UIM in
general. For the sake of this section of the manual, a UIM for a ID-30C/I is displayed unless otherwise specified.
Following are renditions of the different Screens that may be viewed on the UIM.
Boot-up Screen
This screen would only be seen when power is initially supplied to the unit. (See Figure 2-4)
Power
Figure 2-5. Power Screen. Touch screen to Switch Unit On.
Loading, Please Wait...
0000000000
Figure 2-4. Initial Boot-up Only
Power Screen
This screen appears after initial boot-up. To switch the unit on, touch the screen and current internal temperature
readings will appear on the UIM. (See Figure 2-5)
power
° °
7070
Figure 2-6. Home Screen (ID-30C/I UIM Shown). Touch Appropriate Temperature to Adjust Set-Point
(Touch “power” for approximately two (2) seconds to switch unit off)
Home Screen
This screen appears after the power screen is touched meaning the unit is powered on. Real time temperatures are
shown. To view and/or adjust set-points touch the appropriate zone temperature (See Figure 2-6)
°
37
+-
Figure 2-7. Set-Point Adjust Screen. Touch Appropriate “+” or “-” icon to Adjust Set-Point
Temperature Set-Point Adjust Screen
This screen appears after a temperature reading is touched. Adjust the set-point by touching the “+” or “-” icon in
multiple strokes (See Figure 2-7). Freezer Temperature range is -5°F (-21°C) to 5°F (-15°C); Refrigerator is 34°F
(1°C) to 45° (7°C). When done, touch the te temperature to return to the home screen.

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Electronic Control Info. INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS)
select option
Figure 2-9. Option Screen - Freezer Only (ID-30F/I) and Combo Freezer/Refrigerator (ID-30C/I, ID-36C/I)
select option
Figure 2-10. Option Screen - Refrigerator Only w/Air Purifier (ID-30RP, ID-36RP)
select option
Figure 2-11. Option Screen - Refrigerator Only w/o Air Purifier (ID-24R, ID-27R, ID-30R, ID-36R)
Option Screen
After a unit has been switched on, whenever the top drawer is opened the option screen will appear for 2 to 4 sec-
onds, or from the home screen press the arrow icon. below are the different option screens depending on the
model. Touch the icon option desired on or off (see Option Screens Icon table below). A dark icon means that fea-
ture is active.
OPTIONS SCREEN ICONS
Touch to activate or deactivate ice maker system
and max ice feature.
Touch to activate or deactivate door/drawer alarm.
system.
Touch to view settings screen.
Figure 2-12. Option Screen Icons Explained
NOTE: Touching the arrow icon will return to the home screen, or wait 10 - 15 seconds after the last icon press.

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INTEGRATED SERIES (DRAWERS) Electronic Control Info.
Settings Screen
Touching the settings icon (the cog) will bring up the settings screen, allowing the different settings to be adjusted.
The settings screen scrolls in a loop, but the icons are shown in static format below (See Figure 2-14). Also see
Settings Screen Quick reference Table (See Figure 2-15).
Settings
Figure 2-14. Settings Screen and All Icons
SETTINGS SCREEN QUICK REFERENCE TABLE
Touch to view model information.
Touch to select temperature unit, Fahrenheit or Celsius.
Touch to adjust control panel brightness and contrast.
Touch to adjust door/drawer alarm volume and pitch.
Touch to adjust door/drawer alarm duration.
Touch to enter Sabbath mode.
Touch to view troubleshooting and service information.
Touch to set clock.
Touch to select smart home options.
(Not availabel at this writing)
Touch to select language options.
Touch to adjust soft on lighting.
Figure 2-15. Settings Screen Quick Reference
Lighting Screen
Choose the lighting screen (light bulb icon) to adjust the lighting delay effect and the intensity. Touch the appropriate
slide bar(s) to adjust (See Figure 2-16).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
Soft On
Dimming Accent
1S
2S
4S
L
M
H
Figure 2-16. Lighting Screen

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INTEGRATED SERIES (DRAWERS)
Clock Screen
Choose the clock screen to view or adjust the clock time. Touch the hour, minute or the AM / PM indicator to adjust
the appropriate icons (See Figure 2-17).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
+-
:17
Clock
Figure 2-17. Clock Screen (changing minutes)
Language Screen
Choose the language screen (globe icon) to display the words on the UIM in the desired language. Touch the lan-
guage desired (See Figure 2-18).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
Languages
English Spanish Italian
French German
Figure 2-18. Language Screen (choosing English)
Information Screen
Choose the information screen (circle with an “i” in the middle icon) to display filter life, versions of the software,
error codes and serial numbers. Touch the heading of the information to be displayed (See Figure 2-19).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
Info
Filters Versions Errors
Customer Service 1-800-222-7820
Serial#
Figure 2-19. Information Screen

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INTEGRATED SERIES (DRAWERS) Electronic Control Info.
Temperature Units of Measure Screen (choosing Fahrenheit or Celsius Temperature Display)
Choose the Temperature Units of Measure screen (°C/°F icon) to view or change the units of measure. To choose,
touch the desired unit of measure (See Figure 2-20).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
Select Units
°C °F
Figure 2-20. Units of Measure Screen (Fahrenheit chosen)
Brightness and Contrast Screen (choosing Fahrenheit or Celsius Temperature Display)
Choose the brightness and contrast screen (1/2 dark sun icon) to view or change the brightness and/or contrast of
the LCD of the UIM. Touch the appropriate slide bar(s) to adjust (See Figure 2-21).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
Brightness & Contrast
Figure 2-21. Brightness & Contrast Screen
Sound Screen
Choose the drawer alarm volume and pitch with this screen (speaker icon) to view or change the volume and/or
pitch of the alarm when a drawer is left open. Touch the appropriate volume or pitch icon(s) to adjust (See Figure 2-
22).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
Sound
Volume Pitch
L
M
H
Figure 2-22. Brightness & Contrast Screen

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Drawer Alarm Time Screen
Choose the drawer alarm time screen (bell with clock inside icon) to adjust the amount of time it takes for a drawer
to be open before the alarm chimes when a drawer is left open. Touch the appropriate “+” or “-” icon to adjust (See
Figure 2-23).
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 10 to 15 seconds, the
home screen will reappear.
60S+-
Door Alarm Time
Figure 2-23. Drawer Alarm Time Screen (sixty seconds chosen)
Star-K (Sabbath Mode) Screen
Choose the Star-K screen (Star with “K” inside icon) to enable the Sabbath mode. Press and hold the Star-K icon
for the (10) seconds to enable Sabbath mode (See Figure 2-24). When in Sabbath mode the screen will go dark
and slowly flash “Sabbath: Touch Screen for 5s to Exit” (See Figure 2-25). This will then return to the home screen.
Press and Hold 10s
to Enable Sabbath
Figure 2-24. Star-K Screen (Press Star-K for 10 Seconds to Enable Sabbath Mode)
Sabbath: Touch
Screen for 5s to Exit
Figure 2-25. Star-K Active Screen (Touch Screen for 5 seconds to Exit)

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INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS) Electronic Control Info.
Service Options Screen
Choose the service option screen (wrench) to view errors, run service tests, activate or deactivate components, etc...
When first entered, a password will be requested (See Figure 2-26). Press on the dashes until the appropriate sym-
bols appear (See Figure 2-27).
----
Enter Password
Figure 2-26. Service Options Screen Code Requested
After the password is entered the Service Options screen appears and the options can be scrolled in a loop. The
options to choose from (words that will show on screen) will be:
• Errors (see page 2-16 & 2-17)
• Graphs
• Models
• Self Test
• Manual Activation
• Defrost
• Zone Disable
• Temps
• Offset
• Showroom Mode
• USB
• Audit
• Clear Faults
Choose the option to be dealt with by touching the appropriate word.
NOTE: Touching the Arrow key wil step back one screen. If the screen is not touched for 15 minutes, the home
screen will reappear.
X
Enter Password
Figure 2-27. Service Options Screen Code Entered

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INTEGRATED SERIES (DRAWERS)
FUNCTIONS OF THE ELECTRONIC CONTROL SYSTEM
The following pages explain monitoring, regulating and controlling functions of the electronic control system.
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 screen. When a drawer is open, the corresponding normally open light switch allows power to the lighting
system through the control board.
NOTES:
• Power to the light is monitored by the microprocessor to control the drawer ajar alarm feature.
• Power to the refrigerator lights is also monitored to help control the refrigerator evaporator fan and air purifier fan
operation. When a drawer 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 drawer is open, power to the freezer evaporator fan and the icemaker is interrupted.
• If in Sabbath Mode, the lighting system is lowered to 30% brightness.
Monitor, Regulate and Display Refrigerator Compartment Temperatures (All-Refrigerator Units Only)
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 evapo-
rator fan, switching it ON, and when the evaporator temperature climbs to 38-44°F (3-7°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 refrigera-
tor compartment’s “average” temperature that is displayed on the LCD.
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 min-
utes 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.
Additional Regulating of Refrigerator Compartment Temperatures (All-Refrigerator Units Only)
(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 drawers are closed, the motor is supplied with 12V DC at all times from the control board, with the
neutral or ground return. When high offset temperature is detected a command is sent to the evaporator fan motor
to run at high-speed, and the RPM is monitored. 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) sec-
onds 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 a refrigerator drawer is opened while the evaporator fan is operating, the microproces-
sor will detect the power signal to the lights and interrupts the 12V DC power to the fan.
NOTE:
• During Sabbath Mode the lighting system is lowered to 30% brightness and the 12V DC supplied to the evaporator
fan cannot be interrupted, thus the evaporator fan may be observed running when a drawer is open.
• If improper RPM signals are detected from the evaporator fan, the appropriate fault code will be logged.

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INTEGRATED SERIES (DRAWERS) Electronic Control Info.
Monitor and Control Refrigerator Fan-Assisted, Off-Cycle Defrost (All-Refrigerator Units Only)
Temperature signals from the refrigerator compartment and evaporator thermistor’s are observed by the micro-
processor. During the off cycle defrost, if the refrigerator compartment temperature reaches high offset (calling for
cooling) before the evaporator temperature rises to 38-44°F (3-7°C), no power will be supplied to the compressor,
but the evaporator fan will be switched ON. Only after the evaporator temperature reaches 38-44°F (3-7°C) will the
compressor be energized.
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 min-
utes OFF cycling, 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.
Monitor, Regulate and Display Freezer Compartment Temperatures (All-Freezer and Combo Units)
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 evap-
orator 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 on the LCD.
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, 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 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.

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Electronic Control Info. INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS)
Additional Regulating of Freezer Compartment Temperatures (All-Freezer and Combo Units)
(Details of Controlling the Freezer Variable Speed Evaporator Fan Motor)
During normal operation and when the drawers are closed, the variable speed evaporator fan motor in the freezer
zone is supplied with 12V DC at all times from the control board, with the ground or neutral return, and to ensure
proper speed commands the fan’s RPM is monitored at all times. The fan will receive a high-speed run command
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 a freezer drawer (or refrigerator drawer on a combo unit) 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 maxi-
mum 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.
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 a door is open.
• If improper RPM signals are detected from the evaporator fan, the appropriate fault code will be logged.
Monitor and Control “Adaptive Defrost” of Freezer Evaporator (All-Freezer and Combo Units)
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. 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. This is an ongoing process where-
by 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 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.
Monitor, Regulate and Display Refrigerator Compartment Temperatures (Combo Units Only)
The temperature signal from the refrigerator compartment thermistor is monitored by the microprocessor. When
high offset temperature is detected, calling for cooling, the air baffle between th refrigerator and freezer sections is
opened and the evaporator fan is energized. When the compartment reaches low offset temperature, the fan is
switched OFF and the baffle is closed. Though compartment air temperature fluctuates, it is the refrigerator com-
partment’s “average” temperature that is displayed at the right side of the LCD.
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 EE appears at right in LCD, the service icon flashes and the
appropriate fault code is logged.

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INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS) Electronic Control Info.
Monitor Ice Making System
During an ice production cycle, the microprocessor observes the power supplied to the water valve solenoids.
NOTES:
• 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 ice-
maker system OFF, then back ON with the ICE MAKER key.
• Power to the freezer lights is monitored to help control icemaker operation. If a freezer drawer is open, power to
the ice maker system is interrupted, unless the icemaker is filling with water at that time. After the drawer 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.
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. 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 a drawer is not opened during
the last run period), then the service icon will flash and the alarm will chime.
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 clear the faults at the service
options screen on the UIM. Failure to clear Fault Codes will result in the highest priority fault indicator reappearing
in the LCD when the unit is switched back ON.
Monitor Compressor Area Ambient Temperature to Control Condenser Fan Speed
All ID units use a variable speed condenser fan motor, and a thermistor in the compressor area monitors the sur-
rounding temperature to vary the speed of the condenser fan motor. At approximately 55°F (13°C) the fan would run
at low speed, at approximately 75°F (24°C) the fan would run at medium speed and at approximately 95°F (35°C) or
greater the fan would run at high speed.
NOTES:
• If there is no signal from the thermistor the fan will default to high speed.

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Electronic Control Info. INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS)
POSSIBLE INSTRUCTION AND ERROR/FAULT INDICATORS
Code Structure
10
15
20
30
35
40
44
45
50
60
90
95
98
Device/System
Thermistor Faults
Relay Faults
Defrost Heater Faults
Ice/Water/Accessory Faults
Fan Faults
Runtime Faults
Glass Heater Faults
Lighting Faults
Flow Meter Faults
Load/Component Faults
Control Faults
Diagnostics
Power Faults
0
1
2
3
4
5
6
7
8
9
A
L
U
H
C
b
Zones
Misc
Zone 1
Zone 2
Zone 3
Defrost System
Control System
Compressors
Ambient
Icemaker
Dispenser
Air Filter
Lighting
Water System
High Voltage System
Condenser
Baffle
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
50
55
56
60
65
66
70
71
72
73
74
75
Failures
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
FET Power Output Fault
DC Output Fault
Excessive Runtime
Primary Heater Fault
Secondary Heater Fault
Door Heater Output Fault
Burned Out Light
No Position/State Detect
Open Heater
Triac Open
Triac Short
No Load/Load Open
Stuck at Dispnsr Water Valve Out
Stuck at Ice Water Valve Out
Bad Flash Write
Flash Initialized
Flash Memory Bad
Flash Memory Not Present
Invalid E2 Checksum
Invalid Model E2 Checksum
(CONTINUED NEXT PAGE)

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INTEGRATED SERIES (DRAWERS)
INTEGRATED SERIES (DRAWERS) Electronic Control Info.
10
15
20
30
35
40
44
45
50
60
90
95
98
Device/System
Thermistor Faults
Relay Faults
Defrost Heater Faults
Ice/Water/Accessory Faults
Fan Faults
Runtime Faults
Glass Heater Faults
Lighting Faults
Flow Meter Faults
Load/Component Faults
Control Faults
Diagnostics
Power Faults
0
1
2
3
4
5
6
7
8
9
A
L
U
H
C
b
Zones
Misc
Zone 1
Zone 2
Zone 3
Defrost System
Control System
Compressors
Ambient
Icemaker
Dispenser
Air Filter
Lighting
Water System
High Voltage System
Condenser
Baffle
80
81
82
83
84
85
86
87
90
92
93
95
96
97
98
99
Failures
No Communication
Communications Timeout
Partial Communications
Bad Micro Communication
Micro Initialization
Display Failure
Flow Too Slow
No Flow
Framing Errors
Excessive Collisions
Data Overrun
FMEA Error
Calibration or Low Signal Error
Quantum SPI
Brownout
Other
Error Severity Explained
Low 1 = Error is logged and only readable through service menu, no indication to user, no chime
2 = Splash screen to user upon door opening, error logged in service and user menu. No chime
Med 3 = Steady on screen to user upon door opening, error logged in service and user menu, No chime
4 = Steady on screen to user upon door opening, error logged in service and user menu, with chime when
door open
Critical 5 = Steady on screen to user upon door opening, error logged in service and user menu, with chime when
door open