Daikin U4 Error | U4 – Communication error between indoor and outdoor units/outdoor and BS units – A mistake with the interconnection wires, or an indoor/outdoor PCB... | By Jush sharing | Facebook
![daikin u4 error how to fix - ROMA Heating & Cooling | HVAC Contractors: Furnace, Boiler and Heating Repair & Servicing daikin u4 error how to fix - ROMA Heating & Cooling | HVAC Contractors: Furnace, Boiler and Heating Repair & Servicing](https://www.romaheating.ca/wp-content/uploads/2022/05/daikin-u4-error-how-to-fix.jpg)
daikin u4 error how to fix - ROMA Heating & Cooling | HVAC Contractors: Furnace, Boiler and Heating Repair & Servicing
![We have a Daikin ducted air conditioner. I had error code U4. We were told to switch off outdoor unit at isolator for We have a Daikin ducted air conditioner. I had error code U4. We were told to switch off outdoor unit at isolator for](https://ww2.justanswer.com/uploads/MrEureka/2011-12-24_102353_dknn.jpg)
We have a Daikin ducted air conditioner. I had error code U4. We were told to switch off outdoor unit at isolator for
![daikin u4 error how to reset - ROMA Heating & Cooling | HVAC Contractors: Furnace, Boiler and Heating Repair & Servicing daikin u4 error how to reset - ROMA Heating & Cooling | HVAC Contractors: Furnace, Boiler and Heating Repair & Servicing](https://www.romaheating.ca/wp-content/uploads/2022/05/daikin-error-code-a5-how-to-fix-2.jpg)