Our avr prismic have been working switching leds 1 & 2 from the standby card since the day that was commissioned. I've been reading and now I'm not to sure that was the right operation mode. Is correct that led 2 always had to be on and led 1 had to be off unless an event occurs, isn't?
When the AVR is operating in main and the balance with the standby is OK, LED1 and LED2 have to flicker. If only 1 LED is on it means that you have not a match betwen Standby and Main.
You're at the end of the road again.