Any JSB Firedex experts

[bibbage]

Hi

About 3 months ago I was called to a site with 4 zone Firedex panel, panel with hinge down front with eng. code inside.  Anyway it turned out to be a faulty EOL on one zone which was an EOLM1, which we ordered and I later fitted successfully.
This week got called to the same panel, different zone in fault, checked all the heads and connections, when I located the EOL it was an EOLM not an EOLM1 as before.  I had one on the van which solved the problem, but how can this be?  The other 3 zones have EOLM1 and zone 4 has EOLM.  I tried fitting EOLM1 to zone 4 but the fault did not clear.
I'm pretty sure that these two EOLs are not interchangeable, anyone got any ideas.

Cheers
Bibbage

[Benzerari]

Make sure there are no Tees and spurs with EOLMs, the system wouldn't accept fitting more than one EOLM per zone circuit...

[John Dragon]

EOLM is for 2100 series panels
EOLM 1 is for all(?) other conventionals.