Samsung WF393 Series - User Manual

The Samsung WF393** is a washing machine designed for household use, featuring various wash cycles and options to cater to different laundry needs. It incorporates a range of sensors and control systems to ensure efficient and safe operation. The machine offers both quick test modes for diagnostics and a service mode for in-depth troubleshooting and component checks.

Important Technical Specifications

Water Valve Resistance: 1.0K to 1.2K ohms.
Door Lock Switch Resistance: Approximately 40 to 57Ω between No.1 and No.3 pins.
Water Level Sensor Frequency: Approximately 26.4 kHz with no load.
Drain Motor Resistance: Approximately 174Ω between the terminals for the Water Supply Valve.
Drum Motor Resistance: 15Ω between any two of the three terminals.
Washing Motor Resistance (DD Motor): 2 to 4 MΩ between pins 1 and 3, and 1 and 4 of the four (4) pins on the main PCB motor.
Washing Motor Resistance (Universal Motor): Approximately 40 to 45Ω between Nos. 1 and 4 of the wire pin on the side of the TACHO SENSOR.
Washing Motor Resistance (Three Phase Motor): Approximately 3 to 12V between Nos. 2 and 3 of the wire pin on the side of the HALL SENSOR (voltages may differ depending on the speed of revolutions).
Water Supply Valve Resistance (nF/nF1 error): 0.8k to 1.8KΩ between the terminals.
Drain Pump Resistance (nd error): Drain: 13.50 ~ 16.50Ω; Bubble: 18.750 ~ 22.750Ω.
Door Switch Resistance (dL error - Type 1): Approximately 125Ω between 1 and 3 Pin.
Door Lock Switch Resistance (dL error - Type 2): Approximately 949Ω between Nos. 3 and 5.
Washing Heater Resistance (Hr error - Type 1): 16.05±0.65Ω between A and B.
Water Valve Coil Resistance (No water/not enough water error): 1.18K ohms.

Usage Features

The washing machine offers a user-friendly interface with various modes and options:

Quick Test Mode (Power Off): Activated by pressing SOIL + SPIN + POWER. This mode allows for quick checks of individual components:
- Water Valve Test: Checks water valve operation.
- Door Lock: Verifies door lock functionality (requires activation before running other components).
- Heater: Tests the heating element.
- Drain Pump/Bubble Pump: Checks pump operation.
- EEPROM Memory Clear: Clears memory by pressing DELAY START + POWER.
Service Mode (Power On): Activated by pressing SIGNAL + EXTRA RINSE. This mode provides more in-depth diagnostics:
- Cycle Count/Version: Displays the number of cycles completed and software version.
- Board Input Test: Allows checking LED indicators by moving the jog dial. This is useful for testing water temperature during normal wash operation.
- Diagnostic Error Code Check: Activated by pressing SPIN. "d" will flash, and turning the rotary cycle selector (knob) clockwise or counter-clockwise cycles through diagnostic codes (d1, d2, d3, etc.). Turning the knob in one direction shows codes from the latest (d1), while turning in the opposite direction shows codes in reverse order (e.g., d5 to d4).
- Spin Test (RPM): Activated by pressing SPIN ("d" will flash). Turning the dial clockwise or counter-clockwise initiates the spin test. Note that this test does not check the Hall Sensor and requires offsetting the counterweight when testing an empty machine. The unit is normally unbalanced until 350-400 RPM, as counterweights align correctly only after this RPM is reached.
- Pre Wash + Soil Level (for 3 seconds): Used to pause the cycle.

Maintenance Features

The manual provides detailed instructions for checking and correcting various issues, including:

Component Checks:
- Door Lock S/W: Check resistance before and after power-off.
- Water Level Sensor: Check frequency and connections.
- Water Valve: Check resistance, foreign material in diaphragm, and voltage (110V) during "water valve test."
- Drain Motor: Check resistance between terminals.
- Drum Motor: Plug out connector and read resistances between any two of the three terminals.
Error Mode Troubleshooting: The document lists various error codes (LE, 3E/E3/bE, nF/nF1, nd, dS, dL, LO, FL, Hr, tE, dc, OE, PE, PEI, SUdS/Sd, 8E1/8E2/8E, SF1/SF2/SF3) with their causes, corrective actions, and descriptions, often accompanied by photos.
- Water Level Sensor (LE): Check terminal connections, sensor replacement, and PBA replacement.
- Washing Motor/Hall Sensor (3E/E3/bE): Check motor connector, Hall sensor, stator, and PBA control circuit.
- Water Supply (nF/nF1): Check wire connections, foreign material in valve, freezing, and PBA relay.
- Drain (nd): Check drain pump, foreign materials, freezing, and PCB.
- Communication Error: Check wire connections between sub and main PBAs, and PBA communication circuit.
- Switch Error (E2/Sr): Check for stuck buttons, tight holding screws, and main PBA switching IC.
- Door Error (dS/dL/LO/FL): Check door status, door switch, drain pump, dry duct fan motor, and main PBA door sensing circuit.
- Heater Error (Hr): Check washing heater, dry heater, steam heater, and temperature sensors.
- Water Leakage (LE): Check for leaks on base, hoses, valves, tub connections, foreign material in DV case, and drain motor operation.
- Overflow (OE): Check water level sensor, hose, and freezing.
- Temperature Sensor (tE): Check washing/dry/duct temperature sensors and connections.
- Unbalance (dc): Check laundry type and load distribution.
- Clutch Motor Error (PE): Check clutch motor, assembly status, and wire connector terminals.
- Clutch Hall Sensor Error (PEI): Check clutch hall sensor, wire connector terminals, clutch switching status, and coupling assembly.
- Foaming Detected (SUdS/Sd): Normal operation, indicates excessive foaming.
- Mems PBA Error (8E1/8E2/8E): Check wire connections and replace Mems PBA if necessary.
- System Error (SF1/SF2/SF3): Micro Controller Operation Fail, replace Assy PCB.
General Troubleshooting: The manual also addresses common problems like "Will Not Lock," "Will Not Spin," "No Key Operation," "Excessive Suds," "Will Not Unlock," "Fills with wrong temperature water," "Will Not Start," "Stops," "Leaks water," "Vibrates or is too noisy," "Load is too wet at the End of the cycle," "Has detergent remains In the automatic dispenser After the wash cycle is complete," and "Has no water Or not enough water," providing step-by-step corrective actions.
Schematic Diagram: A detailed schematic diagram (POTOMAC) is provided, illustrating the connections between the main PCB, sub PCB, motor, sensors, valves, and other components, along with a color code reference. This is crucial for electrical diagnostics and component identification.
PCB Pinouts: Detailed pinout descriptions for the Sub PCB (CN10, CN3_GRAPHIC, CN2) and Main PCB (CN6, CN1, CN7, CN5, CN3, CN4, CN10) are included, aiding in precise voltage and signal checks.