This is a really old system, and I believe you are trying to boot a really old OS (if it's 4.52 stock) ... both of these are most likely out of sync with what you installed on it back in the day (warp 3, 4?).
If you were able to get 3 or 4 (or something) on it back then, then perhaps check to see if that can be repeated today, and then look into the upgrade processes to finally get to 4.52 plus fixes. This gets you to a known starting point. Save that image (for reload), and test in other directions ...
I'd think you need a more modern boot CD, such as in the links provided ... this is the only way I can think of to get all the fixes into place that have occurred over the years, for the installer routines. Even then, it's a gamble, given the weird combinations of hardware & bios, not the least of which is IDE issues, master/slave, installer switches, etc.
Only other thing I can offer is to possibly try a HDD-based install (and get the CD drive off the bus), where you put all the installation files into a mount-point, and arrange to kick off the install from that directory with some boot diskettes. There are instructions that can be searched for on the 'net, if you feel like gathering all the modern pieces, creating an install dir, and giving it a shot. This would possibly bypass much IDE (CD Drive?) grief ... certainly another data point.
If you have a real love for the old hardware, and are willing to keep trying, you'll eventually hit on a winning combination. It will take time, but it's why we explore all the old stuff in the first place ...
If you just wanted to see OS/2 running, and explore it a bit, consider virtualization. I run OS/2 in a VM (ArcaOS, 4.52, etc. all the way down to 1.xx) ... it's much easier to try out combinations, at virtual/vm speeds ... no hardware issues, no browser issues (see the virtualization subfolder on this forum).
Hope this helps ...