Samsung RF26HF - User Manual

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Fast Track Troubleshooting

Model:

RF26HF

Publication # MY RF26HF Production Date 06/10/2014

IMPORTANT SAFETY NOTICE – “For Technicians Only” This service data sheet

is intended for use by persons having electrical, electronic, and mechanical experience and

knowledge at a level generally considered acceptable in the appliance repair trade. Any attempt to

repair a major appliance may result in personal injury and property damage. The manufacturer or

seller cannot be responsible, nor assume any liability for injury or damage of any kind arising from

the use of this data sheet.

Bulletins:

Support Information:

HELP: 1-888-751-4086 (Tech Sup. – ASC/SSD)

1-866-894-0637 (Tech Sup. - FE/ME)

GSPN: http://gspn3.samsungcsportal.com/main.jsp

PLUS ONE: http://my.plus1solutions.net/clientPortals/samsung

Force Mode:

Press the Power Freeze and Fridge buttons simultaneously for 8 Seconds, until the display goes blank. Press any key within 15 seconds to cycle through

the mode in the following order: Manual operation1(FF) Manual operation2(0F-r) -> manual defrost of fresh food compartments(rd) -> manual defrost

of fresh and freezer compartments(fd) -> cancel(Display all off)

Load Mode:

Self-Diagnostic Mode:

If Power Freezer key + Power Fridge key are pressed simultaneously for 8 seconds (including above 2 seconds), self-diagnostic function will be selected.

At this moment, self-diagnostic function will be returned with buzzer sound 'ding-dong‘. If there is an error, display of error will be operated for 30

seconds and then return to normal condition, whether problem is corrected or not. (Refer to self-diagnosis CHECK LIST) See error code list , page 3.

① If Power Freezer key + Power Fridge key are pressed simultaneously for 6 seconds, ALL ON/OFF will blink with 0.5interval for 2 seconds.

② If take the finger off from above keys and press Fridge, load condition mode will be started. See Load Mode Check List, page 6.

Cooling Off Mode:

If Power Freeze key + Freezer key are pressed for 5 seconds, Cooling off mode will be started. If above Power Freeze key + Freezer key are pressed

one more time, Cooling off mode will be canceled. If Cooling off mode is selected, blinks "OF-OF" on the temperature setting display the panel and

it indicates the refrigerator has entered the Cooling Off mode.

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Summary

Force Mode Operation

Force Mode Activation

Instructions for activating Force Mode by pressing specific buttons.

Self-Diagnostic Mode Activation

Self-Diagnostic Procedure

Procedure to enter self-diagnostic mode, including buzzer alert and error display.

Load Mode Activation

Load Mode Checklist

Details on LED display contents and corresponding operation conditions for Load Mode.

Cooling Off Mode Activation

Cooling Off Mode Procedure

How to activate Cooling Off mode, indicated by 'OF-OF' display.

DC Fan Motor Operation and Testing

Fan Circuit Voltage Test

Procedure to test DC fan circuit voltage, expecting 9 VDC.

Heat Release Ice Maker Functions

Explanation of ice production completion criteria and fault mode behavior.

Ice Maker Test Mode

How to activate Ice Maker I/M Test Mode to check heater and motor.

Freezer Temperature Control

How the freezer temperature is controlled by the ice maker.

Self-Diagnosis Function for Failure

Failure Diagnosis Checklist

List of sensor and fan errors with troubleshooting methods and diagnostic voltage checks.

Inverter Board Connector Layout

This document provides fast track troubleshooting information for the Samsung refrigerator model RF26HF, including self-diagnostic modes, error codes, and technical specifications.

Function Description:

The Samsung RF26HF is a refrigerator that incorporates various features for temperature control, ice production, and self-diagnosis. It utilizes brushless DC fan motors for energy efficiency, operating at two speeds. The refrigerator's main PCB monitors fan speed, and if it detects speeds outside the normal range (exceeding 600 RPM or being too slow/stopped), the fan drive circuit is disabled. The system attempts to restart the fan after 10 seconds with 3 seconds of DC voltage. If this cycle repeats five times, the fan drive circuit is disabled for 10 minutes. The refrigerator also includes an ice maker with a heat release mechanism. The interior temperature of the freezer is set to -14°F until the ice bucket is full, after which it maintains the original set temperature. If the "Ice Off" function is selected, the freezer will be controlled by the set temperature. If the water supply is not connected, the freezer will default to -14°F unless "Ice Off" is selected.

Important Technical Specifications:

The document provides a detailed "Temperature/Resistance/Voltage Chart for Samsung Refrigerators Sensors" which is crucial for diagnosing sensor-related issues. This chart lists resistance (Ω) and voltage (Volts) values across a wide range of temperatures from -29.2°F to 100.4°F. For example, at -18.4°F, the resistance is 47431 Ω and the voltage is 4.129 Volts. At 32.0°F, the resistance is 13290 Ω and the voltage is 2.853 Volts. At 100.4°F, the resistance is 3204 Ω and the voltage is 1.213 Volts. These values are essential for technicians to verify sensor functionality by measuring voltage between specific pins on the Main PCB.

The document also details voltage requirements for various fan motors and heaters. For instance, the FZ-FAN, FF-FAN, and FZ-DEF fan motors require a voltage between 7V and 12V. The FZ-DEF heater and FF-DEF heater resistance values are specified as 63(230) ohm ± 7% and 120(440) ohm ± 7% respectively, with values varying by input power. The FZ-Ice Pipe Heater resistance should be within 1020 Ω ± 7%.

Usage Features:

The refrigerator offers several user-accessible modes for operation and diagnosis:

Force Mode: Activated by simultaneously pressing the Power Freeze and Fridge buttons for 8 seconds until the display goes blank. Within 15 seconds, any key press cycles through various manual operation and defrost modes: Manual operation1 (FF), Manual operation2 (0F-r), manual defrost of fresh food compartments (rd), manual defrost of fresh and freezer compartments (fd), and cancel (display all off).
Self-Diagnostic Mode: Selected by pressing the Power Freezer and Power Fridge keys simultaneously for 8 seconds (including above 2 seconds). A "ding-dong" buzzer sound indicates entry into this mode. If an error is detected, it will be displayed for 30 seconds before returning to normal operation. Error codes are detailed in the "Self-diagnosis CHECK LIST."
Load Mode: Initiated by pressing the Power Freezer and Power Fridge keys simultaneously for 6 seconds, causing all ON/OFF indicators to blink with a 0.5-second interval. Releasing these keys and then pressing Fridge starts the load condition mode. This mode allows checking various operational conditions such as fan speeds (R-FAN High/Low, F-FAN High/Low, C-FAN High/Low), heater operations (R-DEF Heater, F-DEF Heater, French Heater, More Heater), compressor status (COMP), and other conditions like Start Mode, Overload condition, Low temperature condition, Normal Condition, Exhibition Mode, Pantry Room Damper Open, and Ice maker full.
Cooling Off Mode: Activated by pressing the Power Freeze and Freezer keys for 5 seconds. The display will blink "OF-OF" to indicate that the refrigerator has entered this mode. Pressing the same keys again cancels the mode.

Maintenance Features:

The document provides extensive troubleshooting and diagnostic methods for various error codes, which are crucial for maintenance.

Fan Circuit Voltage Test: To test the DC fan motor circuit voltage, power off and then power on the unit. Wait 10 to 60 seconds for the fan voltage to kick in, then check the fan voltage, which should average 9 VDC. If 3 seconds of voltage is observed every 10 seconds for 5 fan power-up cycles, the Main PCB is considered good. The unit may need to be put in FORCED FREEZE mode to activate fans/compressor.
Ice Maker Test Mode: Pressing and holding the ICE TEST S/W for at least 1.5 seconds starts the harvest function. The ice maker heater turns on for about 2 minutes if the thermistor is below 0 degrees, or for 30 seconds if above 0 degrees. After 30 seconds, the heater turns off, and the harvest motor turns on for about 3 minutes. The water supply valve then turns on and off, completing the test. If this sequence is not completed within 6 minutes, a fault mode is entered.
Error Code Diagnostics: The "Self-diagnosis CHECK LIST" provides detailed diagnostic methods for specific error codes (LED F and R indicators). For example:
- FZ-Sensor Error (LED F:1): Measure voltage between Main PCB CN30-"4" and CN76-"1"; it should read between 4.5V~1.0V.
- FZ-DEF Error (LED F:24): After separating Main PCB CN70 wire from PCB, measure resistance between CN70 Brown and CN70 Gray; it should be 63(230) ohm ± 7%. If 0 ohm, it indicates a heater short; if open, a wire/bimetal open.
- IPM Fault (LED F:82): Check for a short between compressor terminals, IPM Voltage (under 13.5V), a short between IPM Pins (#1~33), and inspect the compressor and the cycle.
- Ice Maker(FZ) Function Error (LED F:26): If this error occurs more than 3 times, the Ice Maker should be replaced, and its normal operation checked.
Connector Layouts: The document includes detailed connector layouts for the Main Board and Inverter Board, indicating the function of each pin (e.g., FZ-DEF-HEATER, FZ-Sensor, COMP. SIGNAL INPUT, etc.) and their corresponding voltage or signal types. This is critical for pinpointing connection issues and performing accurate voltage/resistance measurements.
Inverter Board Troubleshooting: A table outlines LED blinking frequencies for various protection functions (Starting Failure, SPM Fault, Detecting Position Failure, Motor Locked, Low Voltage, Over Voltage) and provides corresponding test and replacement procedures. For instance, if "Starting Failure" LEDs blink, check the Inverter PCB & Comp Relay Connectors. If connectors are OK, replace the Inverter PCB; if the problem persists, replace the compressor.

This comprehensive guide ensures that technicians can effectively diagnose and repair issues with the Samsung RF26HF refrigerator, leveraging its self-diagnostic capabilities and detailed technical specifications.