Yokogawa OX400 — Alarm Documentation

The earlier page presented generic symptoms and boiler-probe checks as an OX400 alarm guide. It was not a verified code-to-action mapping. Record the exact displayed indication and consult the matched OX400 operating manual.

Configuration scope

OX400 measures sampled gas using a zirconia sensor. Use the installed model code and sample-drawing option when choosing documentation.

Detailed fault isolation remains subject to separate technical review. This page does not authorize component replacement from a symptom alone.

OX400 model reference