Hi! I'm hoping you all can help. Below is what is happening from the electrician's notes. We narrowed it down to the heat cool unit. All tight connections everywhere.
"According to his home monitoring system, lights in the main house and garage (a main panel and subpanel) were flickering along with a buzz sound. We identified it was correlating with pool chiller kicking on. Found when pool chiller/heater was engaging voltage was dropping from 236 volts to 211 phase to phase and 118 volts to 105 volts from ground to each phase. Customer needs to contact pool company to inspect issue with pool equipment."
Obviously something is wrong with the unit. I had a blown capacitor last year, and it was replaced. What is wild and completely stumping 3 electricians is that this cooler is on a subpanel off of the ADU's subpanel, which is a subpanel off of the main house's panel. All capacities are not even close to being maxed out, but somehow this cooler is on the 3rd panel at the end of the line, but affecting voltage drops all the way back to the main house.
Any idea on A) what could be broke in the cooler to be doing this? B) electrically how it makes sense for the voltage to be dropping and also affecting everything "upstream" to the main house?
Im going to call aquacal, but given its July, there is no telling on how long the wait will be to get it checked out for a warranty. And fwiw, it does this on heat or cool mode. I am not sure if its even cooling the water any now, but its so hot outside (90s), i'm not sure it would be cooling it anyways.
THANK YOU