My lg washing machine is a semi automatic model 6.2 kg . water is not getting drained don't know why?

Check your machine drain hose.. in that drain hose water need to travel free

Enter your model number into the self help section of repairclinic.com, you will receive specific trouble shooting info for you appliance.

Your washing machine has a problem with the water unless it is washer-dryer. Water remains in the appliance because drain pump is not functioning properly and laundry is wet.

Dado

The first thing I'd check is the water pump if the timer's working ok...

5E. Water Drain Error.
5E is displayed if the water level frequency detected os 25KHz or less in the initial phase of the UNB - detecting cycle. The WATER DRAIN ERROR
can be rectified by turning the POWER SW OFF AND THEN BACK on.

Hope this helps you

Your question is not easy to answer. An average washing machine is 8 kg. The smaller 6 kg will use less water and detergent, but you will be limited to 4 or 5 pair of jeans at one time...unless your children are small. A front loading machine may be a better choice for you. It can do very large loads, 12 kg, and still use less water and detergent than most top loaders, but be prepared to pay three times the price of a top loader.

The drain is pull the knob which will pull up the drain valve. So if this is not working then the connecting bowden is broken and is not connecting the link to the bottom drain valve.
Look at the bottom and connect. Clean the drain valve, if choked.

Get a new machine. LG washing machines are ****. I have the same model and it has broken down and made horrible noises for years. It finally just stopped working. RIP

Sounds like you have a siphoning problem. Click on the following link for instructions on how to determine if this is the case:

http://www.fixya.com/support/r587481-prevent_washer_siphoning

If this is not the problem, or if you need further advice, please post back and let me know. I hope this helps you.

most common is lint build up. a good hot wash with a good bleach...check your manual for manufacturer's recomendation. There's various products available..bleach is the most in-expensive and works well. make sure its set on high water level...pause machine for 10-20mins...let me know how you get on