NIBE VVM S320 Indoor Module
4 fault codes documented
Installation pump has no contact with supply temperature sensor — Additional heat blocked
This specific alarm indicates that the installation pump cannot communicate with the supply temperature sensor. As a result, additional heating is blocked, and the system switches to an alarm operation, which may reduce comfort.
Low hot water temperature or lack of hot water — Inefficient hot water production
The system is not producing enough hot water, or the water temperature is lower than expected. This can be due to various settings, external valves, or high consumption.
Operational interference not shown on display — General power or circuit issue
If the NIBE VVM S320 is experiencing problems but no alarm or message is visible on the display, it suggests a more fundamental power or electrical circuit issue.
Red LED solid — Active alarm indicating a malfunction
When an alarm occurs, the indoor module's status lamp will shine with a steady red light. This indicates a malfunction that the NIBE VVM S320 cannot fix on its own. Information about the alarm is also shown on the smartguide display.