Door Lock - LG WM2801H Series Training Manual

TRAINING MANUAL
The door lock switch assembly includes a heating PTC, a bimetal, a protection PTC, and a
solenoid. The assembly locks the door during the wash cycle and under certain other
conditions.
DOOR LOCKING
When the system is energized through terminals 2 and 4, the PTCs begin heating. Before
the solenoid operation is activated, the cam forces the system to the OFF position. One
impulse through terminals 3 and 4 locks the door. The lock is detected by the main
board when terminals 4 and 5 are closed.
DOOR UNLOCKING
When the machine is paused, the main board sends an impulse to terminals 3 and 4 and
rotates the cam to the open position. The maximum number of impulses is 3. Upon the
th
4 impulse, the cam reverts to the locked position.
WM2801H*A
DOOR LOCK SWITCH ASSEMBLY
Test results at 77° F (25° C)
2 to 3
3 to 4
4 to 5
2 to 4
Page 70
WM2801H*A
700 ~ 1,500 Ω
60 ~ 90 Ω
∞
(infinity)
120 V (input voltage)
AC
Washing Machine