This module is mounted on the bell cover, it reads the RPM of the generator shaft and will disconnect the starter at about 660 RPM and if the generator goes overspeed it will shutdown around 2190RPM (or for 50HZ operation 1830RPM).
Eurotherm Drive, 590 Series
230V Motor Drive. 20AB028
Motor Drives, models UNI1401, UNI1404
We can repair the mainboard and/or replace the power pack.
We repaired a pair of these with the same fault, a drive that displayed the power light but nothing on the LCD.