Thanks @Razmoket for your support.
It was one of the 10 ohm resistors that was broken.
After replacement the AM220AC is now working again.

Hi, I guess you mean these resistors. [url https://www.dropbox.com/s/1mi7u0gsoh6yi8n/PXL_20210511_4.jpg?dl=0] When measuring them, I found one 10 ohm that was out of spec. Regarding the 1 ohms... I guess you mean the 8 in parallel, I have the same value (0.21 ohm) on both motors. (but when I calcula...

Hello, sorry for writing in English The left wheel motor on my AM 220AC does not want to spin at full power. When running "motor test" in the tool menu, both wheels spins but the left does not always start and lacks power. If I change the motor cabling between right to left, the fault moves to the o...

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Thanks, I'll give it a try.

Sorry for writing in English, I'm trying to fix the circuit board in the charging station and need help locating the fault. When connected with an unbroken loop cable, the LED flashes twice green (weak loop signal) even when I disconnected the loop cable the station blinkes twice. I have replaced a ...