WF-T75B30AD - LG Washing Machine Service Manual (repair manual). Page 59

Initial operation: Press "RESERVATION" + "START/PAUSE" botton together after power on, and  press
"RESERVATION" button only again
(displaying the number of pressing button and each data every 0.5 second)

Sensor

Terminal

of Controller

• Loosening the front panel of the washing machine

and connect the sensor connecting terminal with
the terminal of the jig.

① After supplying water to the washing bath, agitate

for one minute before using the jig.

② Record the sensed value of the sensor attached

to the current product at Test mode.

③ Connect the jig, put the jig sensor into the

washing bath, and record the sensed value of the
sensor.

④ Determine the sensor performance by comparing

the value measured by the jig and the value
measured by the sensor attached to the product.

1 times : TR Controller Group ( 1 ~ 26 )
2 times : Check the temperature sensor codition

0  : Normal

99 : Temperature senosr’s error, 

(Stop sensing for Temperature and Hardness)

3 times : Temperature of supplied water
4 times : Increment/decrement of washing time according to temperature
5 times : Washing stream at Motor off according to temperature
6 times : The number of comparing the conductivity of washing with rinsing conductvity 

0 ~ 9 : Normal

99 : Abnormal (Stop the sensing of Hardness)

7 times : Sensored result (0 ~ FF:  hexadecimal is displayed)

.
.
.

18 times : Initial stage