The part set can behave in several ways depending on programming.
1. Part set internal sounder only (default)
2. Full set zone 1 is e/e and zone 2 inhibited, 3-8 Guard at default.
Part set is zone 2 as E/E and 1,3-8 Guard at default.
3. Silent part set or not at default not sure if its off.
All this is covered in the installation manual and it can get even more complicated depending on old 00 panel versus new prog panel as the programming for part sets is slightly different.
If you have an R8+ or Excel version you can have 4 part sets with an extra option of how you want them to behave.
You will need the engineers code to change how it functions and may find it confusing to say the least.
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