This document outlines the diagnostic procedure for the Electrolux EHE6899SA and EHE6899BA French door refrigerators. It details the various user interfaces (UIs), how to access and navigate the diagnostic mode, and a comprehensive list of functions available for testing and troubleshooting.

Overview of User Interfaces (UIs)

The refrigerator features three distinct user interfaces, each serving specific control functions:

Internal UI: This is the primary control panel for the French door/Multi-door product. It manages the various cavities (refrigerator, freezer, etc.) and their associated functions, such as temperature settings, quick freeze, quick chill, and drinks chill.
External UI (4-button I&W): Located on the left-hand fridge door, this interface is dedicated to controlling the dispenser features, including water and ice dispensing.
VCZ UI: Situated on the top drawer, this UI is specifically used to control the settings of the Variable Temperature Zone (VCZ) drawer, allowing users to customize its temperature for different storage needs.

The internal UI features a central display that shows temperature and other status indicators. Surrounding the display are several touch-sensitive buttons:

SELECT (Lock): Used for compartment selection (FF/FZR) and locking the UI. Pressing and holding this button typically activates the lock function.
Decrease Temperature (-): Adjusts the temperature down for either the Fresh Food (FF) or Freezer (FZR) compartments.
Increase Temperature (+): Adjusts the temperature up for either the Fresh Food (FF) or Freezer (FZR) compartments.
Quick Freeze, Quick Chill, Drinks Chill: These are multi-function selection buttons that activate specific cooling modes for rapid chilling or freezing.
RESET (AIR FILTER): Resets the air filter reminder.
MODES: Used to cycle through different operational modes or to change the status of functions within the diagnostic mode.
RESET (WATER FILTER): Resets the water filter reminder.
ICE MAKER: Controls the ice maker function, allowing users to turn it on or off.

Diagnostic Mode (Service Mode)

The diagnostic mode provides a powerful tool for service technicians to test individual components and monitor various system parameters.

How to Enter and Use the Diagnostic Mode:

Entry: To enter the diagnostic mode, press and hold the "+" and "-" buttons simultaneously for 10 seconds. Upon successful entry, a tone will sound, and all LEDs on the Internal UI, External I&W UI, and VCZ UI will illuminate, confirming activation of the diagnostic mode.
Navigation:
- Press the "+" button to progress through the different functions.
- Press the "-" button to return to the previous function.
- Press the MODES button to change the status of the currently displayed function (e.g., turn a component on/off).
Information Display: Each function in diagnostic mode is associated with a number displayed on the UI. The status of the function is shown for an intermittent duration. For functions that provide extra information (e.g., defrost heater state, evaporator temperature), the display will cycle through: "N° item, status of the item, N° item, status/value of the extra info, N° item, status of the item...".
Exit: To exit the diagnostic mode and return to normal operation, press and hold the "+" and "-" buttons for 10 seconds again, or unplug the appliance and plug it back in. The appliance will restart in normal mode.

List of Functions in the Diagnostic Mode:

The diagnostic mode allows for testing and monitoring of numerous components and sensors. Here's a detailed breakdown of key functions:

Initial Screens:

First Screen: Upon entering diagnostic mode, all LEDs on the Ruby UI (Internal UI), External Cobalt UI I&W, and Indigo UI will turn ON.
Second Screen: All LEDs on the Ruby UI, External Cobalt UI I&W, and Indigo UI will turn OFF.

Component Tests:

2 - Freezer Defrost Heater:
- Action: Press MODES to change status.
- Behavior: Heater turns "on" or "oF" (off). The Freezer Evaporator Defrost Sensor temperature is flashed on the display, allowing observation of temperature increase. The heater will run for a maximum of 5 minutes or until the sensor reaches 45°C.
8 - Main Valve:
- Action: Press MODES to change status.
- Behavior: The main valve (faucet) activates ("on") or stops ("oF").
11 - Cube/Crush Solenoid:
- Action: Press MODES to change status.
- Behavior: The solenoid activates ("on") or deactivates ("oF"). Important: Do not leave the solenoid activated for more than 1 minute; it automatically turns off after 1 minute of continuous operation.
53 - Water Valve Dispense + Main Valve:
- Action: Press MODES to change status.
- Behavior: Prepares to collect water at the dispenser. Water dispenses when "on" and stops when "oF".
56 - Ice Maker Water Valve + Main Valve:
- Action: Press MODES to change status.
- Behavior: Requires removing the ice tray to collect water. Water flows into the tray when "on". The function remains active for the duration configured by the ice tray water fill setting. This allows checking for very high, normal, low, or very low pressure. After the configured time, the function automatically switches to "oF".
71 - Fresh Food Defrost Heater:
- Action: Press MODES to change status.
- Behavior: Heater turns "on" or "oF". The Fresh Food Evaporator Defrost Sensor temperature is flashed, allowing observation of temperature increase. The heater runs for a maximum of 5 minutes or until the sensor reaches 45°C.
72 - Ice Maker Defrost Heater:
- Action: Press MODES to change status.
- Behavior: Heater turns "on" or "oF". The IceMaker Evaporator Defrost Sensor temperature is flashed, allowing observation of temperature increase. The heater runs for a maximum of 5 minutes or until the sensor reaches 45°C.
74 - VCZ Balance Heater:
- Action: Press MODES to change status.
- Behavior: Heater turns "on" or "oF". Runs for a maximum of 5 minutes continuously.
79 - Fill Tube Heater:
- Action: Press MODES to change status.
- Behavior: Heater turns "on" or "oF". Runs for a maximum of 5 minutes continuously.
10 - Auger Motor:
- Action: Press MODES to change status.
- Behavior: Requires the Fresh Food door to be closed. Motor runs when "on" and stops when "oF".
13 - Fresh Food Light:
- Action: Press MODES to change status.
- Behavior: Fresh Food lights turn "on" or "oF".
14 - VCZ Light:
- Action: Press MODES to change status.
- Behavior: VCZ light turns "on" or "oF".
15 - Freezer Evaporator Fan:
- Action: Press MODES to change status.
- Behavior: Runs at 3 possible speeds: maximum speed ("on"), medium speed ("nL"), or stopped ("oF"). Displays "Lc" for locked rotor, "nS" for absence of PWM signal, and "nP" for absence of 12V or GND signal.
17 - VCZ Fan:
- Action: Press MODES to change status.
- Behavior: Runs at 3 possible speeds: maximum speed ("on"), medium speed ("nL"), or stopped ("oF").
18 - Condenser Fan:
- Action: Press MODES to change status.
- Behavior: Runs at 3 possible speeds: maximum speed ("on"), medium speed ("nL"), or stopped ("oF"). Displays "Lc" for locked rotor, "nS" for absence of PWM signal, and "nP" for absence of 12V or GND signal.
20 - Freezer Light:
- Action: Press MODES to change status.
- Behavior: Freezer light turns "on" or "oF".
38 - VCC Compressor:
- Action: Press MODES to change status.
- Behavior: Compressor runs at maximum speed when "on" and stops when "oF".
47 - Ice Chute Heater:
- Action: Press MODES to change status.
- Behavior: Chute Heater activates when "on" and deactivates when "oF".
62 - Icemaker Evaporator Fan:
- Action: Press MODES to change status.
- Behavior: "on" is displayed when the icemaker evap fan is active, "oF" when deactivated.
63 - Flip Mullion Heater DC:
- Action: Press MODES to change status.
- Behavior: DC Flip Mullion Heater activates when "on" and deactivates when "oF".
66 - Dispenser Light:
- Action: Press MODES to change status.
- Behavior: Dispenser light turns "on" or "oF".
70 - Fresh Food Evaporator Fan:
- Action: Press MODES to change status.
- Behavior: Runs at 3 possible speeds: maximum speed ("on"), medium speed ("nL"), or stopped ("oF").
76 - VCZ Damper Heater:
- Action: Press MODES to change status.
- Behavior: VCZ Damper Heater activates when "on" and deactivates when "oF".
77 - VCZ Damper:
- Action: Press MODES to change status.
- Behavior: Automatically turns on the Freezer Evaporator Fan at maximum speed. Displays "OP" when open and "CL" when closed. Blinks "1" during movement. If the freezer evaporator fan has errors, it displays the fan error status (LC, nS, nP) and damper status (OP, CL). Allows checking for airflow when open and no air leaks when closed.
36 - Ice Chute Door/Ice Flapper Motor:
- Action: Press MODES to change status and moves the flapper motor.
- Behavior: Displays "CL" when closed and "OP" when opened. Blinks "1" during movement. Performs 3 consecutive open/close attempts. Displays "Er" in case of failure.
50 - Icemaker Twist Tray Harvest Test:
- Action: Press MODES to change status and start rotation.
- Behavior: Requires removing the ice bucket to observe rotation. Displays "Go" when the tray is in the home (horizontal) position. Blinks "1" during rotation. Displays "Er" if the twisting action fails.
78 - Ice Maker Tray Bail Arm/Ice Level Bucket:
- Action: Press MODES to change status.
- Behavior: Requires removing the ice bucket to observe the bail arm. Displays "Em" (empty) when the bail arm drops freely and returns to home position. Displays "Fu" (full) when the bail arm is held up and returns to home position. Blinks "1" during ice tray rotation. Displays "Er" if twisting action fails.
61 - Stepper Motor Valve:
- Action: Press MODES to change status.
- Behavior: First position is "Open-Open" and automatically turns on the compressor at maximum speed. Cycles through "Close position", "IM/FZ", and "FF/IM/FZ" (looping through these 4 states). Displays steps as: "03" (Open), "00" (Close), "01" (IM/FZ), "02" (FF/IM/FZ). During "00" and "01" tests, the Ice Maker Evaporator Defrost Sensor temperature is flashed to check for temperature decrease. During "03" and "02" tests, the Fresh Food Evaporator Defrost Sensor temperature is flashed to check for temperature decrease. Blinks "1" during movement.

Sensor Readings:

23 - Fresh Food Door:
- Action: Open/Close FF Reed Switch.
- Behavior: Displays "CL" when closed and "OP" when open.
24 - Freezer Drawer:
- Action: Open/Close FZ Reed Switch.
- Behavior: Displays "CL" when closed and "OP" when open.
25 - VCZ Drawer:
- Action: Open/Close VCZ Reed Switch.
- Behavior: Displays "CL" when closed and "OP" when open.
28 - Dispenser Paddle:
- Action: Press the Dispenser Paddle.
- Behavior: Displays "oF" when closed and "on" when open.
29 - Fresh Food Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the FF Sensor in °C or °F (based on UI selection). Displays "OP" for open-circuit and "SH" for short-circuit.
30 - Freezer Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the Freezer Sensor in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
31 - Fresh Food Evap Defrost Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the Fresh Food Evaporator Defrost Sensor in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
32 - VCZ Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the VCZ Sensor in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
33 - Ambient Temperature Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the H&T sensor (Ambient Temperature) in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
39 - Freezer Evaporator Defrost Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the Freezer Evaporator Defrost Sensor in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
45 - Icemaker Tray Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the IceMaker Tray Sensor in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
68 - Icemaker Evaporator Defrost Sensor:
- Action: Activates automatically.
- Behavior: Displays temperature sensed by the IceMaker Evaporator Defrost Sensor in °C or °F. Displays "OP" for open-circuit and "SH" for short-circuit.
64 - Humidity Sensor:
- Action: Activates automatically.
- Behavior: Displays relative Humidity sensed by the H&T sensor in %. Displays "OP" for open-circuit and "SH" for short-circuit.

Software Version and Lifetime Information:

After cycling through all function tests, the diagnostic mode provides information about the appliance's software versions and operational lifetime.

Software Parameters:
- Action: Runs automatically, scrolling digits.
- Behavior: Displays an 8-digit sequence related to the parameters flashed inside the erf2600 power board (e.g., "00499539"). Press "+" to skip.
Main Board Firmware Version:
- Action: Runs automatically, scrolling digits.
- Behavior: Displays an 8-digit sequence related to the ID string or firmware version of the erf2600 power board (e.g., "JHB10G10").
Ruby UI Firmware Version:
- Action: Runs automatically, scrolling digits.
- Behavior: Displays an 8-digit sequence related to the ID string or firmware version of the Ruby User Interface (main Internal UI) (e.g., "1GAB0002"). Press "+" to skip.
Indigo Firmware Version (VCZ drawer):
- Action: Runs automatically, scrolling digits.
- Behavior: Displays an 8-digit sequence related to the ID string or firmware version of the Indigo User Interface (VCZ drawer UI) (e.g., "MHFE0600"). Press "+" to skip.
Cobalt I&W Firmware Version (external 4 buttons):
- Action: Runs automatically, scrolling digits.
- Behavior: Displays an 8-digit sequence related to the ID string or firmware version of the Cobalt External User Interface (4 buttons I&W and Wifi UI) (e.g., "LHIW0400"). Press "+" to skip.
Lifetime:
- Action: Press "+" to pass to the next digit.
- Behavior: Displays a 4-digit sequence representing the number of days since the first startup (0-9999 days) (e.g., "0077" for 77 days).

Free Counter:

The final section of the diagnostic mode displays a free counter, which is a 1-second up-counting timer (0, 1, 2, 3...). This indicates that Service Mode has concluded. To return to normal mode, press and hold the "+" and "-" buttons for 10 seconds, or unplug and replug the appliance.

Appendix A: Seven-segment display character representation

This appendix provides a visual guide to how numbers (0-9) and letters (A-Z) are represented on the seven-segment display, which is crucial for interpreting the information shown in diagnostic mode. This ensures technicians can correctly read the displayed codes, statuses, and values during troubleshooting.

Electrolux EHE6899SA - UI Functional Areas

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