9-2.Door Lock Switch Assembly - LG F14A8TDHP1N Service Manual

-2. DOOR LOCK SWITCH ASSEMBLY
iring
Circuit in the MAIN P B / iring Diagram
diagram
Function
The Door Lock Switch Assembly consists of Heating PTC, a Bimetal,
a Protection PTC, and a Solenoid. It locks the door during a wash cycle.
1. Operation for door closing
- After the system turns on, PTC heating starts up through terminal 2-4's
- After PTC heating starts up and before solenoid operation is driven, force
⇒
- Authorizing one impulse through terminal 3~4 (PTC & solenoid) will make
- Door lock is detected when switches in terminal 4~5 are set closed.
⇒
⇒
- Authorizing the impulse occurs in 5 seconds upon input for max
⇒
2. Operation for door opening
- With a temporary stop, door automatically opens by CAM rotations
- Upon the fourth authorization of the impulse, the position of CAM (or Slider
MICOM
authorizing the power on.
the system to the off position through CAM (or Slider return spring)
Door close
the door lock.
CAM rotation (or Positioning slider return spring) will forcibly clear off
the connection. The maximum, allowable number of impulse authorization is 2.
Upon the third authorization of the impulse, the position of CAM
(or Slider return spring) goes back to the door-open position.
performance and two authorization processes are allowed at most
Normal operation period of PTC heating : 1-5 seconds.
(or positioning slider return spring) after authorizing the impulse from the
terminal 3~4 and power turns off
return spring) goes back to the door-close position.
MAIN P B
Vdc
12V
12V
Relay
Relay
maximum of 3 times of the authorizing period.
–
50
YL
1 1 2
BL
2 2 3
RD
3 3 4
BK
4 4
5
NA4
AC
Common
terminal
of Valve
Door switch
Vac