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Is   

displayed?

Is the connector connected to
Sub PWB assembly 
disconnected or 
disassembled? (NA1)

Reconnect or 
repair
the connector

Turn on WM and operate
check clutch motor Is it spin

or not?

Replace 
Clutch motor 
or sub PCB 
or PCB 
harness

Is the connector connected 
clutch  to Motor disconnected 
or disassembled? 

1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.

Is three pin wire of 
display PWB broken?

Replace the 
DISPLAY 
PWB
ASSEMBLY

Check the 
fuse or reset 
the circuit 
breaker

Is the supplied voltage 
120V AC?(+10%, -15%)

Is the current rating of 
multi-outlet 
power strip enough?
(Avoid connecting several 
electric devices )

Alternate with 
explanation

Is the connector connected 
to PCB/Noise filter 
disconnected or 
disassembled? 

Reconnect 
or repair
the 
connector

Replace the 
MAIN PWB 
ASSEMBLY

Is LED on while the power 
is on?

Is the button of panel 
stuck? 

Is the display PCB broken? 
(check the buzzer sound 
and LED light 
while push the button )

Replace the 
DISPLAY 
PWB 
ASSEMBLY

Repair the 
button

Reconnect or 
Repair 
the connector

Is the connector connected 
to Main PWB / Display 
PWB disconnected or 
disassembled? 

When Resistance (Ohm) checking the Component, be sure to turn the power off, 
and do voltage discharge sufficiently.

WH

0 

ȳ

YL to RD

0 

ȳ

WH to BL

Result

Test Points

0 

ȳ

YL to RD

0 

ȳ

WH to BL

Result

Test Points

(1)

(3)

BL

YL

RD