BigIP i-series - Clearing Alarmlog on LCD not possible

First, interesting that you don't have the lcdwarn. I am checking a VE, that definitely don't have LCD, and I have the command available. That is just a Perl script, that seems to call logger. Do you have another iSeries to check that?

In relation to the LCD options. If you don't have that option in your device, the are possible reasons:

1 - Document is outdated

2 - Document is wrong

3 - Something disabled in your configuration

4 - Firmware or software problem

Anyway, if you check another iSeries, we may be able to solve lcdwarn part. However, in relation to the second problem, for any of the possibilities, you will need to talk with F5 support.