Samsung WF405 A2 Series User Manual

Fast Track Troubleshooting
Model: WF405**/A2
Publication #Dr WF405*A2 Production Date 4/29/14
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
**With the Power On**
**Test Mode** With the Power Off
SERVICE MODE: WITH POWER ON - PRESS: Signal + Extra Rinse
TEST FUNCTION PRESS
1 Cycle Count SIGNAL
2 Version SOIL Level
3
Board Input Test (Move Jog
dial to check LED) (See Chart
at bottom)
Extra Rinse
4
DIAGNOSTIC ERROR CODE
CHECK (See Below)
SPIN - (“d” will start flashing) Turn dial
either clockwise (c.w) or counter c.w.
5
SPIN TEST ( RPM) (ref:
NB***)
Pre Wash + Soil Level for 3sec. (To Pause:
press - START/PAUSE)
QUICK TEST MODE: WITH POWER OFF - PRESS: SOIL + Signal + POWER
NB*** Spin Test will NOT test Hall Sensor in this mode. NOTE: ALWAYS
remember to offset counter weight when spin testing an empty machine
FACT: It is NORMAL for this unit to be unbalanced until 350-400 RPM –
counter weights will only align correctly after this RPM is reached
• Activate the SERVICE MODE first (ref: above).
• Press the SPIN key to start DIAGNOSTIC CODE check mode. “d” will start flashing.
• To cycle through the diagnostic codes (d1, d2, d3, etc.), turn the rotary cycle selector
(knob) either clockwise or counter clockwise.
• When turning the rotary selector key (knob) in one direction, it shows diagnostic codes
from the latest (d1).
• Now when turning the knob in the opposite direction it shows the diagnostic codes in the
reverse order. E.g. When it stops at “d5” and then turn backwards, it shows from “d4” to
“d”. (Refer to Diag. Code interpretation).
Service mode Option 4:
DIAGNOSTIC ERROR CODE CHECK
 Use the Board input test under service mode to test water temp,
during normal wash operation.
Service mode Option 3:
Board Input Test Chart
TEST FUNCTION PRESS
1 Water Valve Test
TEMP
**Door Lock Must be Activated 1
st
before running Component **
2 Door Lock SPIN
3 Heater SOIL
4 Drain Pump /Bubble Pump SIGNAL
5 EEPROM MEMORY CLEAR
DELAY START + POWER (with POWER OFF)

Samsung WF405 A2 Series Specifications

General

Capacity	4.0 cu. ft.
Color	White
Number of Wash Cycles	9
Washer Type	Front Load
Energy Star Certified	Yes
Voltage	120V
Wash Cycles	Normal, Heavy Duty, Delicates, Quick Wash, Rinse+Spin

Summary

Fast Track Troubleshooting Guide

Important Safety Notice

Technical safety warnings and liability disclaimer for service personnel.

Quick Test Mode

Procedure to test components with the washing machine powered off.

Service Mode

Procedures for diagnostic checks and testing with the washing machine powered on.

Components Check Procedures

Door Lock Switch (S/W) Resistance Check

Steps to check door lock switch resistance and connectivity.

Water Level Sensor Frequency Check

Procedure for checking the water level sensor frequency and connections.

Water Valve Resistance and Voltage Check

Instructions for checking water valve resistance and voltage.

Drain Motor Resistance Check

Method to check resistance across the drain motor terminals.

Drum Motor Resistance Check

Procedure for measuring drum motor terminal resistance.

Error Mode Troubleshooting - Part 1

Water Level Sensor Error (LE)

Causes and corrective actions for water level sensor faults.

Motor Errors (3E, E3, bE)

Troubleshooting steps for washing motor and hall sensor faults.

Water Supply Error (nF, nF1)

Diagnosing low water pressure issues and supply faults.

Drain Error (nd)

Corrective actions for drain pump faults, blockages, and freezing.

Error Mode Troubleshooting - Part 2

Communication & Switch Errors (E2, Sr)

Troubleshooting electronic control and main relay switch faults.

Door Errors (dS, dL, LO, FL)

Diagnosing issues related to door status, locking, and unlocking.

Heater Error (Hr)

Troubleshooting washing heater and temperature sensor faults.

Water Leakage Error (LE)

Identifying and fixing water leakage problems in various parts.

Error Mode Troubleshooting - Part 3

Overflow Error (OE)

Diagnosing overflow issues including hose problems and freezing.

Temperature Sensor Error (tE)

Corrective actions for faulty washing and dry temperature sensors.

Unbalance Error (dc)

Addressing issues caused by unbalanced loads or motor sensor faults.

Heater Error (Hr) - Additional Checks

Further troubleshooting for heater and temperature control problems.

Water Leakage Error (LE) - Additional Checks

Additional steps to identify and resolve water leakage points.

Additional Error Codes

Foaming Detected (SUdS, Sd)

Understanding notifications for excessive foaming during cycles.

Mems PBA Error Detected (8E1, 8E2, 8E)

Troubleshooting PBA and data errors, checking connections.

System Error (SF1, SF2, SF3)

Diagnosing microcontroller failures and replacing the PCB.

Troubleshooting Common Problems

Door Lock/Unlock Issues

Addressing problems where the door will not lock or unlock.

Spin and Load Wetness Problems

Troubleshooting issues with the spin cycle and excessively wet loads.

Control Panel and Suds Issues

Resolving non-responsive controls and problems with excessive suds.

Water Leakage and Draining Problems

Diagnosing and fixing water leaks and failures to drain.

Operational Noise and Water Fill Issues

Troubleshooting operational noise, vibration, and water filling problems.

PCB and Connector Identification

Sub PCB Connector Layout

Diagram detailing connectors and their functions on the Sub PCB.

Main PCB Connector Layout

Diagram showing connectors and their pin assignments on the Main PCB.

Wiring Schematic and Reference

Component Wiring Diagram

Schematic diagram illustrating connections between components.

Wire Color Reference Information

Key for identifying wire colors used in the schematic.