@Marty SummersI don't see any problem with it if they are paying the bill and as long as the air conditioner is connected to the electric outlet with the correct amperage able to handle the load.

I always check the big ticket items (driveway, roof, garage, air conditioners) before purchase to make sure I should be good for a few years while I build equity that I  can use to pay for those repairs in the future if need be. 

I made sure that if he replaced the breaker that this wouldn’t happen again when they plugged the air conditioner back in, because I was not going to replace it for a second time.

We also charge a $300 security deposit, along with a monthly fee for animals and air conditioners.

We keep a few portable air conditioners on hand to place at properties if they have no A/C at all and it will be longer than 48 hours before we can get someone out. 

A window air conditioner had a plugged hole and water backed into the room.

I served them a 3 day notice to quit and the tenant said his lawyer will contact me and he is claiming he was in the hospital for heat exhaustion from the apartment being 100 degrees (he has 2 air conditioners).

Possibly the remnants of an old ptac air conditioner?

I have access to Monthly statements but not current info or historical stuff or attached items of interest, like utility bills showing usage, clues on which units had their appliances or air conditioners replaced.

It seems impossible not to trip the breaker, even when just running a fan and the air conditioner it has tripped on us in the middle of the night.