Rinnai continuous flow hot water system code 92: Neutraliser end of life

Continuous flow hot water system, Australia

On Infinity Enviro 16 and 26, the condensate neutraliser kit has reached the end of its life and needs changing.

This needs a licensed gasfitter. There is nothing safe to check yourself. Leave the covers on and book a professional.

Only some models show this code. Check the list below.

What causes it

Turn the unit off and leave the covers on. Gas components must only be serviced by a licensed technician.
Note the code, how often it appears, and the model and serial numbers from the rating label.
Book a licensed gasfitter and give them those details.

2 models in 1 range

Range	Models
Infinity Enviro	REU-E2626W (Infinity Enviro 26), REU-E1620W (Infinity Enviro 16)

Checked against the manufacturer's manual on 27 October 2026.

Code	Meaning	What you can do
55	Service reminder	Safe checks first, then a pro
61	Combustion fan failure	Call a pro
63	Recirculation low flow	Call a pro
65	Water flow control failure	Safe checks first, then a pro
66	Bypass flow control fault	Call a pro
70	Control board (PCB) failure	Safe checks first, then a pro
71	Gas solenoid valve failure	Call a pro
72	Flame rod circuit error	Call a pro
73	Burner thermocouple fault	Call a pro
79	Water leak detected	Safe checks first, then a pro
LC	Scale build-up in the heat exchanger	Safe checks first, then a pro
SE	Cascade connection failure	Call a pro