240
ArcContinuousFault
Fronius · Primo GEN24 Operating Instructions
What does 240 mean?
An arc has been detected within the PV system, and the maximum number of automatic switch-ons within a 24-hour period has been reached. This indicates a persistent arcing fault, and the inverter will disconnect from the grid for safety reasons, displaying the code for approximately 4 seconds.
Common Causes
- Continuous arcing fault in the photovoltaic system cabling or components.
- Damaged PV system components, such as wiring, connectors, or module junction boxes, leading to persistent arcs.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Before confirming the status, thoroughly check the entire photovoltaic system for possible damage to wiring, connectors, and modules.
- 2
Engage qualified personnel to repair any damaged components detected in the PV system.
- 3
Do not reset the inverter until the source of the arc fault has been identified and safely rectified.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Primo GEN24 Operating Instructions