FiremanLyman
The o-rings are good and there is no water or even any moisture inside where the batteries go. as for the moisture in the control module I don't think there has been any in there or @ least when our service tech has replaced them he has not said anything about it.

On the pack that came on (pass alerted in the station) we were called to mutual aid to a structure fire with a neighboring Dept. I and another F.F.
packed up to make entry
when he put the pack on the batteries were dead. as this was the only 2 packs we had @ the time as we were in the fast attack truck ( pumper had not arrived yet with the other packs) this pack had been checked a few days earlier and was fine. I went to the station the next ,morning and replaced the batteries in it. turned it on and off twice and everything worked ok. then put it back in service. about 2 hours later ( while still @ station)
I heard a pass going off (and I know it was off before I put it way) it was this same pack. I was able to push the side button and shut it off (and the bottle was off no air to it) when I went to put it back in truck as soon as I snapped it into the rack the pack it turned back on. I then turned it back off. then turned the air on and off a couple times and it worked fine. put it back in then checked it a couple 3 days later still ok. about a week after this we were checking packs again and this one had dead batteries. when we replaced them it had a error on the icm (COMM ER) and it went in for repair.

all our packs that have had errors have said the above on the read out.
the ICM that the packs came with have a black dial to read tank pressure on them and the ones that have been replaced are white now. don't know if that tells you anything or not.
I guess we will just have to see if things get better as they get replaced.
hope so. I just have a hard time spending all the $$$$$$$$ for the price of these packs (not just MSA) and having this kind of issue with them.
I will be asking our service man if there has been any sign of moisture in the
control modules

I want to thank you for taking the time today to do some researching into our problem for us

Once again THANKS for your time