Saturday, 28 January 2017

LG VENTILATION DRYER TD V70120E AOWEECI Troubleshooting

Child Lock
For the safety of your children, press Low Temp and Wrinkle care buttons at the same time for about 3 seconds. You can check this function by seeing the dryer display on LED window.
Wrinkle care
Wrinkle care is functioning to prevent creases and rumples that are formed when the laundry is not unloaded promptly at the end of drying cycle. In this function, the dryer repeatedly runs and pauses to the cycle end.
If the door is open during Wrinkle care process, this function is cancelled. If the door is opened during normal operation without selecting Wrinkle care, this function will be remembered and processed.
Level the dryer
Leveling the dryer is to prevent undesirable noise and vibration.
Place your dryer in a solid and level area where water is not dripping, freezing.
If the dryer is not properly level, adjust the leveling legs up and down as necessary.
Turn them clockwise to raise and counterclockwise to lower until the dryer is not wobbling both front-to-back and side-to side.
Diagonal Check
When pushing down the edges of the washing machine, the machine should not move up and down at all.
(Please, check both of two directions) If machine rocks when pushing the machine top plate diagonally, adjust the feet again.
Leveling legs should be secured.
All four legs are stably placed on the solid and even floor.
If dryer is not level, laundry may not tumble properly and sensor will not detect the accurate humidity information.
When leveling, please be cautious not to injure your fingers and toes.
Vent end will face to the outside home and improper taping and unstable installation of vent will cause undesirable drying performance.
Exhaust Requirements and Instructions
1. Venting materials are not provided with the dryer and you should obtain the necessary venting materials locally. For example, the outer end of exhaust pipe must have a weather hood with hinged dampers to prevent back-draft when the dryer is not in use.
2. The exhaust duct must be four inches (10.2 cm) in diameter with no obstructions. The exhaust duct should be kept as short as possible. Make sure to clean any old ducts before installing your new dryer.
3. Rigid or semi-rigid metal ducting is recommended for use as transition ducting between the dryer and and the wall. In special installations when it is impossible to make a connection with the above recommendations, then a UL-listed flexible metal transition duct may be used between the dryer and wall connection only. The use of this ducting will affect dry time.
4. DO NOT use sheet metal screws on exhaust pipe joints or other fastening means which extend into the duct that could catch lint and reduce the efficiency of the exhaust system. Secure all joints with duct tape.
5. To maximize operating results, please observe the duct length limitations noted.
Change the Bulb
No any special tool is needed for this work.
All steps can be done by hand The bulb itself could be very hot when the dryer just finishes its operation. So before changing the bulb, be sure that the inside of the drum is cool down.
1. Open the door, put a hand into the drum and grasp the bulb cover.
2. With bulb held by hand gently, turn the bulb cover clockwise.
3. Separate the bulb cover from the socket housing.
4. Remove the current bulb turning it to Counter clockwise. Be careful that it does not fall off.
5. Replace in the new bulb in the reverse unscrewing direction.
DIAGNOSTIC TEST
No power to the dryer or the controller
Power voltage is within standard range (AC 215V~245V)? 
  No
Check the - Circuit breaker
Check after pulling Black(RLY1), Blue(RLY3) 2 pin connector out from controller.
Check the range of two pin (Red)~ (Black) is within AC 215~245V?
  Yes.
Check or replace the controller
  If NO
Check connection of power cord and harness assembly.
Check White 1pin (Red wire), White 2 pin(Black & white wires) of connector and secure that range is between AC 215~245V?
  If NO
Check or replace the power cord
  If yes
Check the short of harness assembly and the connection (WH1)
In the case that the dryer is not working, when controller is powered and display button is properly working, Check RLY1,RLY2, RLY3, WH1 in the controller.
DOOR SWITCH / LAMP CHECK
Malfunction of lamp operation and door switch No operation of pump motor
Check if they are working while being connected to power supply.
When door is opened, lamp turns on? (Tumbling stops)
  No?
Check door switch movement. Check and replace lamp.
  If yes
When door is closed, lamp turns off?
When “Start” button is on, the dryer is working?
  If yes
Door switch is working normally
  If  No
When door is opened or closed, door switch hook is not broken?
  If No
Replace door hook and close the door
  If yes
With door closed, check voltage of connector RLY1 ~ RLY3 which are pulled out from controller in advance. The voltage range is between AC 215~245V?
  If no
Door frame is distorted
Check door switch
  If yes
Check or replace Controller Assembly Replace Harness and connector
With door closed, check voltage of connector RLY1 ~ RLY3 which are pulled out from controller in advance. The voltage range is between AC 215~245V?
  If no
Check Harness
  If yes
Check and replace controller.
Motor malfunction, ventilation error
Measurement condition : Power cord is unplugged.
Door is closed.
Pre-Check door switch
(If door switch has contact problem, motor is not working.)
When power is on, motor is rotating.
  If yes
Check or replace Controller - TR1, TR2 broken
  If no
During operation, motor noise is generated. And drum and blower are not working.
  If yes
Check belt is burst.
Check structural restriction.
  If no
With BL3 being unplugged from Controller,
BL3 - BL3 resistance. 1~2
BL3 - BL3 resistance 1~3
BL3 - BL3 resistance 2~3 measurement ranges 10 Ohms 20 Ohms ?
  If No
Check or replace Motor
- Check Motor TP
Check Harness connection
  If yes
 Check controller
Heater is not working. Drying failure. 
The designated temperature is not reached
Measurement condition
Power cord is unplugged.
With RLY1,RLY2, RLY3 disconnected from Controller,
RLY2 (Yellow) - RLY3 
(Blue) resistance ranges
26Ohms32 Ohms?
RLY1 (Blue) - RLY3 (white) resistance ranges 53 Ohms~59 Ohms?
  Yes
Check and replace controller.
Relay RTY2, RTY3
  No
When check thermostat to Heater, it is less than 1 Ohm ?
  Yes
Replace Heater
Check Harness connection
  If No
Check or replace Controller Assembly
Replace Harness and connector
Heater On/Off occurs frequently
1. Clean Condensing unit 
2. Check if Lint filter is damaged or clogged
Thermister check
Symptom : Poor drying performance(over-drying or no drying). Abnormal thermistor operation
Symptom : Poor drying performance(over-drying or no drying). Abnormal thermistor operation
With RD4, NA4 disconnected from Controller, check
TH-Heater
RD4  - RD4  resistance ranges table data according to surrounding temperature?
TH-Drum
NA4  - NA4  resistance ranges table data according to surrounding temperature?
  If yes
Check and replace controller.
  If no
When measuring "TH-Heater"
Thermistor, they range Table data ?
  If no
Replace "TH-Heater"
Thermistor
  If yes
When measuring "TH-Drum " Thermistor, they range Table data ?
  If no
Replace "TH-Drum"
Thermistor
  If yes
Check Harness
Trouble Symptom : Drying Failure
Measurement condition : Power cord is unplugged.
With RD4 disconnected from Controller, RD4  - RD4  resistance is unlimited?
  If no
Check Harness
Check if Sensor tips have foreign objects
   If yes
With metal tape attached to Sensor tips, RD4  - RD4  resistance is less than 10 Ohms ?
  If no
Check Harness
- Open, Connector is disconnected
  If yes
After damp clothes touch Sensor tips, the range are within the below table when QA-test?
  If no
Check and replace the controller

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