Samsung WF350ANP/XAA Trouble Shooting Guide (user Manual) (ver.1.0) (English) - Page 7

ALIGNMENT AND ADJUSTMENTS WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power. Service Mode Power On State (Normal User Mode) Signal + Delay Start 3 sec Service Mode Service Mode is canceled if no key is pressed for 5 minutes before the washer operation begins. However, this is not true when the washer operation has already started. Definition of Service Mode: - Service Mode enables service technicians to verify the operation of the washing machine and do troubleshooting. - Service Mode can be entered during all washing cycle without interrupting the cycle except some of test modes. - Various tests can be done with Service Mode. So, troubleshooting can be done based on the resulting diagnostic codes. How to Enter: - To enter the Service Mode, press the Signal and Delay Start Keys for 3 seconds or until the unit sends out beeping sounds. Service Mode: 1. The washer must be on to go into the Service Mode. 2. The motor speed will be displayed when started (It displays 0 when the motor does not spin). 3. The present state of the machine will not be changed. (i.e., the current cycle in progress will not be interrupted and only the display will change) 4. To exit Service Mode, press Signal and Delay Start Keys for 3 second again, or Power Key.If no key is operated during Service Mode for 5 minutes, the machine will return to normal user mode.