Daewoo DWD-UD123X Service Manual page 41

3-3. DOOR S/W
1) The working principle of Door S/W
① Door Locking
Bimetal on (3 sec) --> solenoid (supply 20msec pulse 2 times)
② Door Unlocking
Bimetal off --> solenoid(supply 20msec pulse, until lock)
③ After door locking all parts can work nomally.
④ After pressing power button, if the temperature of wash thermistor is over 55℃ or the water level is
over the safety level, the door will be locked.
⑤ The door will be unlocked immediately after all processes are finished.
⑥ The door can be opened during processing if there is no problem to unlock.
2) DOOR OPEN SYSTEM
① If add the laundry during washing, press the door unlock button.
② Door open sequence at abnormal condition.
3-4. Child Lock
① Press the "Spin" and "Condensing Dry" button simultaneously during processing.
② Under the Child Lock function, only power button is working.
③ During Child Lock function, CHL will be displayed on '18:88'
④ In order to unlock Child Lock mode, press "Spin" and "Condensing Dry" simultaneously.
3-5. The sequence of drain
① If the checking time to reset point is below 1 min, the remaining drain time is 30 sec.
② If the checking time to reset point is over 1 min, the remaining drain time is 2 min.
③ If the checking time to reset point is over 10 min, OE signal will be appeared on PCB.
④ If the temperature is over 50℃ , the water will be supplied to high water level, then the drain will
start.
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