Washing machine Polar PFL-819 - Red service indicator, laundry wash spin, start

Hello.
I have a question about the Polar washing machine.
I have no experience in washing machines and a friend called and stupidly refused to help.
The symptom is as follows. After turning the programmer, all lights come on for each program. After pressing start the green LEDs light up, main wash, spin 800, start flashing and the red service permanently, for a few seconds growling and buzzing.
I will probably have to go there but I would like to be prepared for something, check it out. You can draw a conclusion with your help, eventually
what to hang on At the beginning I had to check the strainers at the water inlet.
I am asking for your suggestions.
Regards.

I send you service codes, but just in case, download the manuals for this model. So on "good morning" as you write, check the filter at the pump because this is the most common fault (some coin, nail, etc.), the drum is rotating freely or the tap is turned on the water, maybe someone turned off the water by accident

Thank you, I'll check everything tomorrow.
Strainers checked. They were clean.
The codes you sent are to the washing machine with display.

Yes, only with the display you know what the fault is, because it is displayed and without the display you need to check everything in turn, I will add that if the strainer is clean it does not mean that something is not sitting in the pump, you need to put a finger and turn the wing, some washing machines have you must reset after removing the fault

I'll check in tomorrow

There is a problem with the heater (if you have correctly described the symptoms).

I received this information over the phone. First of all I think it should be. After pressing start the buzzer sounds and then the four LEDs light up, including one flashing.

Added after 7 [hours] 44 [minutes]:

Do you think this error describes heater problems?

Hello, the problem turned out as colleagues suggested a heater. Thank you for your help and especially to my colleague zhudomel