Gal Hydro controller

I having issues with 2 separate GAL controllers both of the same vintage, approx 8 years old once in a while they will lock up with the doors closed and on the controller display say Alt phase one but the hall indicator just reads the floor it's locked up on. Then you have to recycle the power and it will go to the alt then you can reset it with fire key
It can go 6 months or 3 months between incidents doesn't seem to be a common denominator when it happens, I'm thinking some sort of software glitch just wondering if anyone else has experienced a similar problem.

Gotta be sw issue imo. If they don't recall

Contact Randy or John at GAL Canada. They have always been ready to help when we have needed it.

Does the building test a backup Generator. I have had similar problems, and that ended up being the cause. If so have the maintenance person park the elevators on phase I before doing the test.

thanks for the reply, no there's no emerg generator for the building.