It's probably just me being thick but I've never seen a FAP filter on an RHY (90bhp), only on the 110's (RHS & RHX). Regardless of this, I think you can only do a forced regen on the early systems and not the later type with eolys 176. In case you didn't know, you can tell the difference by looking at the connectors on the FAP tank - later type are green plastic.