Rinnai Tankless Water Heater: Enter installer parameter mode (A button on the PC board)
Enter installer parameter mode (A button on the PC board) on a Rinnai tankless water heater: Parameter mode changes numbered settings such as max temperature, recirculation mode, pump speed and the Service Soon interval.
Applies to: SENSEI RX and CX series tankless
How to fix enter installer parameter mode (a button on the pc board): step by step
- Press the A button on the PC board for 1 s
- Pick the setting number with the controller up / down arrows
- Press On/Off on the controller to step through the option letters (01A, 01b...)
- Press the A button 1 s again to exit
If the unit shows an error code, look it up: Rinnai Tankless Water Heater codes
Source: Rinnai SENSEI RX technical guide (en-CA), Parameter settings. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.