Dolphin Magic runs for 30 seconds

by Calin Diaconu
(Roman, Romania)

Hi,
I have a Dolphin Magic which runs for around 20-30 seconds and then stops. I opened to inspect the circuit board and it looks fine. I checked the cable and the motors and they are also running ok.
When I start the power supply the traction motor starts, after a few second the suction motor start and run for 4-5 second then stops and after that also the traction motor stops. On the circuit board are two leds, on red and one green. When starting the green led blinks 7 times and after that the red led blinks once. To start again sometimes I have to wait around 30 seconds.