Stoves 900EF Grill energy regulator conversion – Help Please

Model – 900EF
Serial – E000720

Hi there, went out to this a week or so back as the grill wont regulate. It’s just on full all the time.
I raised a part number enquiry on Connect Distribution and the replied saying it was obsolete. However I didnt trust their answer so I contacted Glen Dimplex direct and the guy in parts told me that it’s still available as p/n 082590900 which is an INVENSYS type of which I ordered up from Qualtex.
Went back to the job to fit it and all the connections differ from the original regulator.
The origional regulator is a SUNVIC type and has connections as follows:

LOAD A (1 x orange wire)
LOAD B (1 x blue wire)
N (3 x black wires)
L (2 x brown wires)
PL (1 x red wire)

The new INVENSYS regulator:

(2,A) – 2 connections available
(P1,L) – 2 connections available
(4,N) – 2 connections available
(P2,B) – 1 connection available
(S2,PILOT) – 1 connection available

It came with no diagram or conversion what so ever so haven’t a clue how to wire it.
Please can anybody help me?

Thanks in advance,

Rob.