As anyone had much work on the ferrolli falcon. ive had the privallage of working with the modena's but this one has stumped me. the hot water fine central heating the led 4 is flashing for standby but nothing theres a 2-3 min wait then it stops. and only the power light is on. now i went to this job on call n silly me left my multi meter in the car. the strange thing is the standby light comes on only after the dhw has been switched on and off. any info much appreciated. nath