My customer reports that about three times a week at 6:00 am when the guard arrives to open the building the elevators don't respond to the lobby hall call. They said sometimes they wait for up to 10 minutes before the elevators start answering calls. The position indicator shows at least one car in the lobby every time it fails, but it's not always the same car. They were using the fire service key to wake everything up, but then they figured out by sliding a piece of paper between the hall doors, activating the reopen device would open the doors on the lobby car and probably start the generator. Then everything would start working normal until the next morning.
This is a 4 car group. I still haven't been able to see it fail but I'm assuming that when all the generators shut down overnight something is preventing the signal to start the generator on the lobby car. What's the best way to approach this intermittent problem if it continues to elude us?
