Error code
live-status-lamp-red-solid Status lamp red: alarm or fault
Applies to 1 model
S735
What this means
An alarm is active because the S735 has detected an operating fault it cannot resolve by itself.
What you can check yourself
- Read the alarm and suggested actions on the display.
- Select Reset alarm once, if offered, and check whether the lamp returns to white.
- If the alarm remains or returns, contact the installer.
Still not resolved? Contact a qualified installer or servicer.
See the official NIBE manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.
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