Riello Sentinel Dual Error F21: Capacitor bank overvoltage

Riello Sentinel Dual UPS · taken from the manufacturer’s manual, pages cited

Fault codeF21

The capacitor bank has experienced overvoltage conditions. The manual lists no action for this code.

Model
Riello Sentinel Dual
Display shows
Capacitor bank overvoltage (F21)
Type
Fault code
Source
Manual p. 28

What F21 means

Capacitor bank overvoltage p. 28

Common causes

  • Capacitor bank overvoltage p. 28

If F21 is still not resolved

  • contact service / dealer p. 18
    “In order to optimise performance, in ECO mode, the load is normally powered by the bypass.”
Open the manual at page 28 All Sentinel Dual error codes Manual details & download

This page summarises what the manufacturer’s manual says about F21; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Riello. Found a mistake? Report an error.