Hi Snoozy,
Unfortunately this ia common problem with CF cards and especially with accelerators. If you remove your Blizzard 1220 it'll probably boot up on a cold boot. I have a Transcend 16GB 133x CF card that shows this exact problem. If I remove my ACA1230 it boots off it fine on a cold boot.
I then bought two 8GB 133x Transcend CF cards and they both work perfectly with the ACA1230, cold and warm boot. I haven't been able to find a solution to the 16GB card, it seems that the boot sequence happens a lot faster with the accelerator plugged in and some CF cards don't initialise in time when the Amiga boots off the HDD.
Cheers