ABB/FIMER inverter E031 Error Read V: what it means and what to do

Common causes

• A fault in the inverter's output (grid-connection) relay, or in the internal measurement of the voltage across it. FIMER describes this as an error inside the inverter.

Safe steps to try

1. Note the code and the lights Write down E031 and the "Error Read V" text, and note whether the Alarm LED is lit. Do not open the inverter, a disconnect, a junction box or any conduit, and do not touch the panels, racking or wiring.
2. Check your monitoring If you have a monitoring app or portal, check whether the system is producing anything. E031 usually stops the inverter from connecting to the grid.
3. Book a technician FIMER's procedure is to switch the inverter off and back on and, if the error remains, contact FIMER customer assistance. A technician can do that safely and handle the case with the manufacturer.

Frequently asked questions

Could my solar panels be causing E031?

FIMER's manual describes E031 as an error inside the inverter that cannot be checked externally. It concerns the inverter's own output relay, not the panels.

Will restarting the inverter fix it?

FIMER's first step is a single off-and-on restart. If E031 comes back, the manual's remedy is to contact customer assistance, which usually means a repair or replacement of the inverter.

My inverter says ABB, Power-One or Aurora. Does this apply?

The E031 description here comes from FIMER's alarm-code table, which FIMER describes as the complete list of errors and warnings for its string inverters, with some codes unused on some models. Read the code and text exactly as your display shows them.

Other ABB faults

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