WD-80150T, WD-80155TUP - LG Washing Machine Service Manual (repair manual). Page 22

AC 220-240V

PWB ASSEMBLY (MAIN)

PWB ASSEMBLY (MAIN)

(RED)

(RED) (WHITE)

(WHITE)

(WHITE)

(WHITE) (BLUE)

(BLUE)

(RED)

(RED) (WHITE)

(WHITE)

(WHITE)

(WHITE) (BLUE)

(BLUE)

1

2

Replace the sensor 
(pressure)

Replace the PWB
assembly  

Repair drain hose

Remove foreign
material.

Reconnect or repair the
connector

Replace the pump
assembly

Replace the PWB
assembly (Main) 

When pressing [Bio] and [Time Delay] at the same
time after draining, 
is  the water level frequency 252 or more?  
When pressing  [Bio], [Time Delay] buttons at the
same time while wash, is the water level frequency
between 220 - 240V~?

Checking voltage between two pins as press
the power button is the voltage 
220 - 240V~ ?

Is the drain hose twisted or frozen?

Is the impeller of the drain pump clogged?

Is the connector disconnected,
disassembled?

Is the coil of drain pump cut-off?
(resistance of coil is 90~160Ω)

When checking voltage between connectors
(①, ②)on spinning, is the voltage 
220 - 240V~  as the figure?