Hello and thank you for the opportunity to help you.
Let me know if you can get this link to load by copy and paste method. This is the only documentation I can find for you. It does provide you the ability to go into test mode which may help you narrow down your issue. That error you are receiving can be retrieved, but I've only seen it once and it had to do with the brake release.
Ok, well let me know if it finishes the cycle successfully please.
My customers washer said the same thing about the coupler. I did not find a problem with it though. As far as the draining, there may be a problem with the pump, but usually it would be more than sometimes if there was an issue with it. Just get back to me then :)