Two zone Daikin mini split heat pump system (one outdoor unit, two indoor units) Bedroom indoor unit operating properly Living room unit throwing a U4 fault code: communication error Indoor unit has a condensate pump that breaks the communication wire if there's a problem with it being unable to pump Poured water into the pan to cycle the pump. Verified water is flowing all the way to the outdoor discharge (it goes into the gutter on the rooftop patio) Reset power to the entire system Fault code is no longer present Both indoor units are cooling properly at this time. Tested them both in "powerful" mode at the same time. Gave the outdoor coil a quick brush clean to get the pollen buildup off. Showed JC's sister how to wash the filters for the indoor units
