LG WM2901H*A Series - 8-3. TROUBLESHOOTING SUMMARY

25
Remarks
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 kΩ 3.8 k Ω 2.8 k Ω
Remarks
Result
(tolerance
5%)
At 86℉ (30℃)
At 104
℉ (40℃)
At 140
℉ (60℃)
At 158
℉ (70℃)
At 203
℉ (95℃)
At 221
℉ (105℃)
At 241
℉ (116℃)
At 266
℉ (130℃)
At 293
℉ (145℃)
At 320
℉ (160℃)
At 356
℉ (180℃)
39.5 k
Ω
26.1 k Ω 12.1 k
Ω
8.5 kΩ 3.8 k
Ω
2.8 k
Ω
2.1 k
Ω
1.4 k
Ω
1.0 k
Ω
0.7 k
Ω
0.4 k
Ω
Lamp Pin1: 16.5 V
Thermistor
Pin4: wash thermistor
Pin6: wash heater
Motor RD. pin1: U
pin2: V
pin3: W
NA. pin1: +
pin2: Hb pin3: Ha
pin4: GND
Door Switch NA. pin1: PTC
pin2: PTC
Inlet Valve NA4. pin3: main wash BL. pin1: common
pin2: AG valve
NA5. pin2: pre valve
pin3: bleach pin4: hot valve
Result
Test Points
5-15 Ω 5-15 Ω
5-15 Ω
(1) to (2) (2) to (3) (3) to (1)
ResultTest Points
8-12 k
Ω
8-12 kΩ
10-15 Vdc
10 Vdc
10 Vdc
Remarks
Voltage Input
Pulsing Signal
Pulsing Signal
(1) to (2) (1) to (3) (1) to (4) (2) to (4)
(3) to (4)
Result
Test Points
700-1500
Ω
60-90
Ω
Infinity
120 Vac
Remarks
At 77
℉(25℃)
At 77
℉(25℉)
Voltage Input
(2) to (4) (3) to (4)
(4) to (5) (2) to (4)
Pump Drain pump: 10-20 Ω Circulation pump: 18-30 Ω
Result
Test Points
0 Ω 0
Ω
WH (1) to RD (3)
WH (3) to RD (1)
Heater: 12 -18
Pin1 to Pin2: 0 -1.2 k
Heater BL, BK. pin4: Vac (input) BL. pin3: steam generator
heater (input)
BK. pin3: wash heater (input)
pin3: steam generator/
YL.
wash heater (output)
pin4: Vac (output)
ΩΩ
ΩΩ
AG Sensor YL. pin1: GND
pin2: S pin4: L
Display pin3: GND pin4: 12V pin5: 5V
Pump BL. pin3: circulation pump NA. pin1: drain pump
BL. pin3 to NA. pin1
1. Pump running: 120V
5%
2. Stopped Motion Pump: 0-1V
8-3. TROUBLESHOOTING SUMMARY