I recently purchaced at auction a genset with a Dorman engine and an Ecc generator it is rated at 400V, 376A and 208 Kw. It was used as a reserve power supply in the Copenhagen hospital. The motor starts and runs very well, I am however having problems with the generator. I believe the problem is entirely in the AVR and I'm hoping to get some answers here. At first it would only produce 200V, then I read online, if there was an external potentiometer or CT then those respective terminals need to be jumped. This machine did in fact have an external CT and I have jumped the terminals marked P1, P2 and P3 in various ways. The voltage has jumped up to 360V but the frequency is behaving very strangly. At idle The frequency between L1 and L2 is around 200 Hz, between L2 and L3 120 Hz and L1and L3 560Hz. The frequency fluctuates greatly. I live in Sweden so 50 Hz is desireable. Can anybody tell me what's going on?