Hi Psszo,
I had the same problem as you with my previous dCS elgar+, verona, verdi and purcell. (search mode in the display on the dac)
I was for a time unsure what the reason was, but was narrow it down to either the transport or the dac, however my brother had the delius dac and the problem reoccur.
I was sending the transport for service, however short time afterwards it reoccur again, for me the problem was the 1394 cable/es, I was then using some aftermarked cables purchased here on audiogon.
I was for a period instead of using 1394 using two dig xlr from the purcell to the elgar+ with a very good result, using 24-176.4 upsampling, but since I had the problem both on cd and sacd I was prefering to fix it.
After changing out the cables, the problem disappear.
Regarding verdi I think the transport was very sensitive as mention above, I had several sacd records with problem to read (table of contens) in the display, difficult to get the cd out and some frustration about it of cource.
As mention above, need to power the verdi down7up again to get control and take the cd out.
With my new Scarlatti transport the transport have no problem playing the same sacd, soo I don't think the sacd record are the problem, more of a problem with the verdi being to sensitive for reading information.
For your problem I think the first thing I would have done if the "search mode" appears frequently was to disconnect the purcell, then use one 1394 for a few days and check if it reoccur, then try with the other cable for a few days.
1394 cables are not to expencive either, so another option could be to change them out and try again.
Verdi have to 1394 outlet, assume that delius have two inlets, you may can change the way it is connected today from verdi to purcell and to delius.
There are some option here you can try before you send it to service.
Good luck
Kind regards
Geir
Norway