DOWNLOAD LG WM2016CW Service Manual ↓ Size: 6.83 MB | Pages: 56 in PDF or view online for FREE

8. TROUBLESHOOTING

8-1. SAFETY CAUTION

There’s built-in AC 120V and DC power in output terminal of PWB assembly in common. Be careful
electric shock when disconnecting parts while trouble shooting. (Wear Electro Static Discharge gloves
when working.)
After cutting off the power when changing PWB assembly, disconnect or assemble.
Be careful static when handling PWB assembly, and use Electro Static Discharge plastic pack when
delivering or keeping it. 

8-2. ERROR MODE SUMMERY

WATER INLET

ERROR

1

IMBALANCE 

ERROR

2

DRAIN

ERROR

3

OVER FLOW 

ERROR

4

PRESSURE 

SENEOR

ERROR

5

DOOR OPEN 

ERROR

6

THERMISTOR

ERROR

7

• Correct water level (246) is not reached within 8 minutes 

after water is supplied or it does not reach the preset water
level within 25 minutes.

• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.

• Door not all the way closed.
• Loose electrical connections at Door switch and PWB

Assembly.

• The DOOR SWITCH ASSEMBLY is out of order.

• Not fully drained within 10 minutes.

• The SENSOR SWITCH ASSEMBLY is out of order.

• The THERMISTOR is out order.

• Water is overflowing (water level frequency is over 213). 

If               is displayed, the drain pump will operate to drain

the water automatically.

If you press the START/PAUSE button when an error is displayed, any error except 

will 

disappear and the machine will go into the pause status.
In case of 

, 

,

if the error is not resolved within 20 sec., or the in case of other errors,

if the error is not resolved within 4 min., power will be turned off automatically and the error code will
blink. But in the case of 

, power will not be turned off.

LOCKED

MOTOR

ERROR

8

EEPROM

ERROR

9

POWER

FAILURE

10

• The connector (3-pin, male, white) in the MOTOR HARNESS

is not connected to the connector (3-pin, female, white) of
STATOR ASSEMBLY.

• The electric contact between the connectors (3-pin, male,

white) in the MOTOR HARNESS and 4-pin, female, white
connector in the MAIN PWB ASSEMBLY is bad or unstable.

• The MOTOR HARNESS between the STATOR ASSEMBLY

and MAIN PWB ASSEMBLY is cut (open circuited).

• The hall sensor is out of order/defective.

• EEPROM is out of order.

Displayed only when the START/PAUSE button is first 
pressed in the Load Test Mode.

• After the power supply is stopped while washing machine is

working, the power is supplied rapidly

8-3. TROUBLESHOOTING SUMMARY

Remark

Result

(tolerance 

5%)

At 86

℉

 (30

℃

)

At 104

℉

 (40

℃

)

At 140

℉

 (60

℃

)

At 158

℉

 (70

℃

)

At 203

℉

 (95

℃

)

At 221

℉

 (105

℃

)

39.5 k  

Ω

26.1 k 

Ω

12.1 k 

Ω

8.5 k

Ω

3.8 k 

Ω

2.8 k 

Ω

Pin4: W

ash thermistor

RD

Pin1: U

Pin2: V

Pin3: W

NA

Pin1: +

Pin2: Hb

Pin3: Ha

Pin4: GND

NA

  Pin1: PTC

Pin2: PTC

NA_

Pin3: Main wash

BL3

BL4

Pin1: Common

Pin2: Pre wash

Pin3: Bleach

Pin4: Hot valve

Result

T

est Points

8~12 k 

Ω

8~12 k

Ω

10~15 Vdc

10 Vdc

10 Vdc

Remark

V

oltage Input

Pulsing Signal

Pulsing Signal

Pin1 to Pin2

Pin1 to Pin3

Pin1 to Pin4

Pin2 to Pin4

Pin3 to Pin4

Result

T

est Points

700-1500 

Ω

60-90 

Ω

Infinity

120 V

a

c

Remark

At 77

℉

(25

℃

)

At 77

℉

(25

℃

)

V

oltage Input

Pin1 to Pin3

Pin2 to Pin3

Pin3 to Pin4

Pin1 to Pin3

Result

T

est Points

0 

Ω

0 

Ω

WH Pin1 to RD Pin3

WH Pin3 to RD Pin1

0.8~1.2

Ω

BL4 Pin1: Drain pump 

1. Pump running: 120V 

5%

2. Stopped Motor/Pump: 0~1V

10 ~ 20 

Ω

Result

T

est Points

5~15

Ω

5~15

Ω

5~15

Ω

Pin1 to Pin2

Pin2 to Pin3

Pin3 to Pin1

Drain pump :

8-4. TROUBLESHOOTING WITH ERROR

Is                 displayed?

When you press both
DELAY WASH button and
BEEPER button
simultaneously,
is the water level frequency
below 24.6 kHz?

(Refer to 7-3.)

Is filter inlet valve clogged
with foreign material?

Is the connector connected to
inlet valve assembly
disconnected or
disassembled?

Is resistance between
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 k

Ω?

(Refer to 9-5 inlet valve
assembly)

Clean or
replace the filter.

Check the AIR
CHAMBER
and the tube
(clogged).

Reconnect or
repair
the connector.

Replace the
INLET VALVE
ASSEMBLY.

Is the voltage of the inlet
valve connector 120 V AC?
(Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)

Replace the
INLET VALVE
ASSEMBLY.

Is the connector connected to
MAIN PWB assembly
disconnected or dis-
assembled?(NA4, BL3, BL4)

Reconnect or
repair
the connector.

Is Electrical connection
correct?

(Refer to 9-5 wiring diagram)

Replace the
MAIN HARNESS.

After checking connector,
is the water level frequency
below 24.6 kHz?

(Refer to 7-3)

Replace the MAIN PWB
ASSEMBLY.

[Note] Environmental safety check list
1) No water tap leakage
2) No water tap freeze
3) No entanglement of water supply hose
4) No water shortage
5) No shrinkage on water supply hose due to

a possible misuse of hot and cold water

6) No water supply hose leakage

Check the
PRESSURE
SWITCH.