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Fault codes › ABB / FIMER › UNO-DM-6.0-TL-PLUS-US

ABB / FIMER UNO-DM-6.0-PLUS E084

Code
E084
Shown as
BackFeed OC
Vendor severity
Error
Page
128
ID
fc:abb-uno-dm-6-0-plus-us-e84
IRI
https://solarlattice.org/kb/fc/abb-uno-dm-6-0-plus-us-e84
Status
active
Also known as
E084, e84, ABB / FIMER E084, BackFeed OC
Category
Inverters
Class fault drafted · lead
Production not stated
Clears after a manual reset drafted · lead

Decoded

Reports string reverse current; look at PV array; do: inverter restart.

What can be behind String reverse current

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 E084, ABB / FIMER PVS-60-TL E084, ABB / FIMER UNO-DM-3.3-5.0-PLUS E084
CPS
CPS SCA50-100K-T Fault2000-2150, CPS SCA50-100K-T Fault3000-3070
Huawei
Huawei SUN2000-100KTL-USH0 2012
SMA
SMA SBSE-US-50 4013, SMA SBSE-US-50 4014, SMA SBSE-US-50 4015, SMA SBSE-US-50 4016, SMA SBSE-US-50 4017, SMA SC-CP-XT 4003, SMA SC-CP-XT 7901
Sungrow
Sungrow SG200HX 1548-1579, Sungrow SG250HX 1548-1579, Sungrow SG350HX 1548-1579

Same code in other families

Claims

defined_in

c1 drafted · lead FIMER UNO-DM-6.0-TL-PLUS-US-Q Product Manual RevB

c2 drafted · lead UNO-DM-6.0-TL-PLUS-US Product Manual RevA

has_event_class

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

from the code prefix

reports

c4 verified · fact String reverse current

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

affects

c5 drafted · lead PV array

mitigated_by

c6 drafted · lead Inverter restart

has_recovery

c7 drafted · lead Manual reset (operator restarts or acknowledges)

Applies under good irradiance; at low irradiance it is a normal protection. If it persists after restart, contact service.

review note: support check: partial - Restart under good irradiance and low-irradiance normal protection are stated, but 'manual reset' clearing is only implied by the restart instruction.

applies_to

c8 drafted · lead UNO-DM-6.0-TL-PLUS-US string inverter

Data