Rinnai i120c combi boiler losing pressure (error code 430)

[Fitter30]

Page 2

https://s3.amazonaws.com/s3.supplyhouse.com/product_files/UPS15-58FC-install.pdf

 

[GReynolds929]

I think it was the circulator, as I adjusted it and now since I done this no error code.

Shaft of the motor needs to be horizontal, not vertical or diagonal.

 

[Sponsor]

 

[John Gayewski]

I'm gonna guess the circulator didn't cause the problem, but we'll see.

 

[SalMazz]

Your circulator is upside down. I don't think it's causing your problem but it's a pretty fundamental mistake.

I'm not that familiar with rinnia, but have you cleaned the unit since installed? How's your water quality.

Thank you i fixed the circulator and this was the problem. No error code since!!

 

[SalMazz]

Help system was working from February 29,2025 until March 12, 2025 with no error code E430 once I adjusted the circulator. Now I am getting the E430 on occasions sporadic. Any thoughts maybe pressure switch?

 

[Fitter30]

Help system was working from February 29,2025 until March 12, 2025 with no error code E430 once I adjusted the circulator. Now I am getting the E430 on occasions sporadic. Any thoughts maybe pressure switch?

What's the water pressure? Minimum is 13 lbs.