My isar HE24 boiler(Flashing L F ) had a recon; PCB as it wasn't reading the Flame detection signal. working fine I went away for 2 days of Xmass to come home AM & find it flashing H5. I felt a bit of faint heat in Rad pipes from upstairs feed & return so it had been working. Had to rush out for the day so in Eve; Realising jumper links were on 3 & 5, I copied old PCB & set to 3 & 4. Still no change. Next morning after much searching on line for info; I found jumper links should be 3&4 & display code(to denote jumper settings) for isar HE24 = 0.4 & evo HE22/24 = 1.2 . Wont start up on 3&4 so I pull out 4. now works fine all day on C heating. No hot water but left it to heat house up for now. In eve; I put link 4 back on. It shows "7" on start up like it used to. (Not 0.4 or 1.2) CH & hot water both working fine now ! Had hot bath. After a few hours went out to come home late & find it not working & flashing H5 again !!
This morning I pull out link from 4 & CH is working (no D H Water). Can't find much info; on settings. No ref; to "7" start up code. Can any one shed light on this please ?
This morning I pull out link from 4 & CH is working (no D H Water). Can't find much info; on settings. No ref; to "7" start up code. Can any one shed light on this please ?
