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Fault codes › ABB / FIMER › UNO-DM-3.3/3.8/4.6/5.0-TL-PLUS-US

ABB / FIMER UNO-DM-3.3-5.0-PLUS E026

Code
E026
Shown as
Vref Error
Vendor severity
Error
Page
130
ID
fc:abb-uno-dm-3-3-5-0-plus-us-e26
IRI
https://solarlattice.org/kb/fc/abb-uno-dm-3-3-5-0-plus-us-e26
Status
active
Also known as
E026, e26, ABB / FIMER E026, Vref Error
Category
Inverters
Class fault drafted · lead
Production not stated
Clears after a manual reset drafted · lead

Decoded

Reports reference voltage out of tolerance; look at inverter; do: inverter restart, contact manufacturer service.

What can be behind Reference voltage out of tolerance

Failure modes that present as the reported condition, and the tests that tell them apart.

Defined in

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

Same condition on other equipment

ABB / FIMER
ABB / FIMER PVS-166-175-TL E026, ABB / FIMER PVS-60-TL E026, ABB / FIMER TRIO-20.0-27.6-TL E026, ABB / FIMER UNO-DM-6.0-PLUS E026
Fronius
Fronius Galvo 460, Fronius Primo 460, Fronius Symo 460
KACO new energy
KACO new energy blueplanet TL3 150

Same code in other families

Claims

defined_in

c1 drafted · lead FIMER UNO-DM-3.3-5.0-TL-PLUS-US-Q Product Manual RevB

c2 drafted · lead UNO-DM-3.3-5.0-TL-PLUS-US Product Manual RevA

has_event_class

c3 drafted · lead Fault (device stops or needs intervention)

from the code prefix

reports

c4 drafted · lead Reference voltage out of tolerance

affects

c5 drafted · lead Inverter

mitigated_by

c6 drafted · lead Inverter restart

c7 verified · fact Contact manufacturer service

verified by: review-workflowverified on: 2026-10-23

has_recovery

c8 drafted · lead Manual reset (operator restarts or acknowledges)

Power cycle first; contact service if the fault persists afterwards.

review note: support check: partial - Power cycle then contact service is stated, but the passages never say the fault clears by manual reset.

applies_to

c9 drafted · lead UNO-DM-3.3/3.8/4.6/5.0-TL-PLUS-US string inverter

Data