Solar Lattice

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

SMA SI-US W748

Code: W748
Vendor severity: 1
Page: 216
ID: fc:sma-sunny-island-us-w748
IRI: https://solarlattice.org/kb/fc/sma-sunny-island-us-w748
Status: active
Also known as: W748, w748, SMA W748
Category: Inverters

Class warning drafted · lead

Production not stated

Clears not stated

Decoded

May indicate temperature sensor fault; look at temperature sensor.

Defined in

SI4548-6048-US-BE-en-21W — SMA · page 216 drafted · lead
- tbl=152.r5 h=b4f30a36b4c6

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

Claims

`defined_in`

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

SI4548-6048-US-BE-en-21W tbl=152.r5 h=b4f30a36b4c6

`has_event_class`

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

from the Type column

SI4548-6048-US-BE-en-21W tbl=152.r5 h=b4f30a36b4c6

`indicates`

c3 verified · fact Temperature sensor fault

SI4548-6048-US-BE-en-21W tbl=152.r5 h=b4f30a36b4c6

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

`affects`

c4 drafted · lead Temperature sensor

Transformer temperature sensor of a slave device.

SI4548-6048-US-BE-en-21W tbl=152.r5 h=b4f30a36b4c6

`applies_to`

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

SI4548-6048-US-BE-en-21W tbl=152.r5 h=b4f30a36b4c6

Data