LG WT-R857 Service Manual page 50

12) Power is automatically turned off during operation or immediately turning on
the power button.
Where, what & how to check?
Auto Power Relay or Controller
1. Check whether power is automatically
turned off when turning on the power
switch after unplugging the power cord
from the outlet.
2. It would be defect of the controller if
power is automatically tumed off
immediately when turning on the power
switch even though there is no defects
in the power switch.
13) Sensor
(1) Malfunction
Problems
Assembling the not- calibrated
controller.
Short
The sensor is automatically stopped by
the accumulated foreign materials.
Sensor is out of order
Stop/Reset the sensor:Stop or reset the sensor by entering Test mode.
Result of Check
Automatically tumed Mechanical defect of the
off power switch
Result of Check
• If the value is not within 1~26 by
checking the controller group.
• When checking the value of the
electrode sensor by Test mode
during the operation
(washing,rinsing, spinning etc.) of the
washing machine, the sensed value
has no change.
• The difference between the sensing
value measured from the supplied
water by a jig and the sensor value of
the product is 5 or more..
• Temperature sensor fault : "
displayed Check the operation of
temperature sensor by the QC test
mode.
50
Possible Cause
Change the switch.
Change the controller.
How to repair & settle
Recalibrate or replace the controller.
Check the harness, clean the electrode of
sensor
Stop the sensor working*
Change the sensor, clean the electrode of
sensor
Stop the sensor working*
" Change the sensor or controller
Check the Harness
How to repair & settle