Sounds like you have an evaporative system it will flush water for about 5 mins when it first starts to cool the unit. After that it only is supposed to flush every couple hours to dump salty water buildup.
If its a breezeair they have a really poor design on the "solenoid" that does this. Two micro switches worth a couple bucks die so they charge you $300 for a new valve. When it dies it continuously flushes water and the unit after about 10mins comes up with a service 2 fault.
Oooo thank you Doovalacky! I will check when we start using it again how often the water flushes. We have a bonaire so hoping thats better than breezeair