Solar Lattice

Fault codes › SMA › Sunny Island 4548-US / 6048-US

SMA SI-US W824

Code
W824
Shown as
Error Q4 contactor
Vendor severity
1
Page
217
ID
fc:sma-sunny-island-us-w824
IRI
https://solarlattice.org/kb/fc/sma-sunny-island-us-w824
Status
active
Also known as
W824, w824, SMA W824, Error Q4 contactor
Category
Inverters
Class warning drafted · lead
Production not stated
Clears not stated

Decoded

Reports switching device status fault; look at AC contactor.

What can be behind Switching device status fault

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

Fronius
Fronius Galvo 457, Fronius Primo 457, Fronius Symo 457
KACO new energy
KACO new energy blueplanet TL3 125
SMA
SMA SC-CP-XT 7704, SMA SC-CP-XT 7707, SMA SC-CP-XT 7708, SMA SI-US F801, SMA SI-US F809, SMA SI-US F816, SMA SI-US F817, SMA SI-US W808, SMA SI-US W815
Yaskawa Solectria
Yaskawa Solectria SGI-XTM Contactor Fail, Yaskawa Solectria XGI-1500-1MW CRIT-5, Yaskawa Solectria XGI-1500 CRIT-5, Yaskawa Solectria XGI-1500-DCG CRIT-5

Claims

defined_in

c1 drafted · lead SI4548-6048-US-BE-en-21W

has_event_class

c2 drafted · lead Warning (device continues, a condition is flagged)

from the Type column

reports

c3 verified · fact Switching device status fault

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

affects

c4 drafted · lead AC contactor

applies_to

c5 drafted · lead Sunny Island 4548-US / 6048-US

Data