I am very grateful to Alexander, he arrived in 10 minutes, and this is outside of business hours... I quickly fixed the problem. Of course, I keep his number in my phone book.
Many thanks to Alexander. Three specialists watched and tried to launch the hydrophore, but gave up after 3-4 hours of work. Alexander arrived, checked and got to work. After 20-30 minutes, everything worked fine. I recommend contacting only a SPECIALIST!!!!