Solar Lattice

Fault codes › Fronius › Fronius Symo UL (10.0-3 to 24.0-3 208-240/480)

Fronius Symo 242

Code
242
Shown as
Arc detected
Vendor severity
Class 2
ID
fc:fronius-symo-242
IRI
https://solarlattice.org/kb/fc/fronius-symo-242
Status
active
Also known as
242, Fronius 242, Arc detected
Category
Inverters
Class fault verified · fact
Production stops verified · fact
Clears after a manual reset drafted · lead

Decoded

May indicate arc fault.

Defined in

The manufacturer's own cause and corrective text is not reproduced here.

Same code in other families

Claims

defined_in

c1 drafted · lead fronius-symo-ul-emanual-status-codes

indicates

c2 drafted · lead Arc fault

has_event_class

c3 verified · fact Fault (device stops or needs intervention)

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Code 242 needs an Enter reset and is an arc event, but the passages don't state a fault classification.

has_production_effect

c4 verified · fact Trip (production stops)

Feed-in resumes only after acknowledgement, implying it is interrupted until then.

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - The passages say the inverter restarts feeding after the reset, which implies feed-in was interrupted, but they don't say so explicitly.

has_recovery

c5 drafted · lead Manual reset (operator restarts or acknowledges)

If it keeps recurring, contact the installer.

applies_to

c6 drafted · lead Fronius Symo

Data