thank you for your remark, however I could not find an answer to my problem in the mentioned thread. My Servers work fine, its just the red indicator LED which gives the impression that the service is not running, however it runs fine over weeks. People are working via web on the published DBs.
The short answer is, there is no answer to this issue. The admin console simply reports the status of the WPE incorrectly.
If you are fortunate enough to have the chops to program custom tools to monitor its status, then you can follow the tactics employed by John May over at Point In Space. Otherwise, you'll need to learn the command line commands to start and stop the WPE manually.
As you point out, the users are able to connect and the engine is working, so it's really more of an annoyance than anything else. My suggestion would be to ignore it. That's basically what we do.