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

SMA SI-US F721

Code: F721
Vendor severity: 4
Page: 215
ID: fc:sma-sunny-island-us-f721
IRI: https://solarlattice.org/kb/fc/sma-sunny-island-us-f721
Status: active
Also known as: F721, f721, SMA F721
Category: Inverters

Class fault 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 215 drafted · lead
- tbl=151.r12 h=8b6de1b3e36a

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=151.r12 h=8b6de1b3e36a

`has_event_class`

c2 drafted · lead Fault (device stops or needs intervention)

from the Type column

SI4548-6048-US-BE-en-21W tbl=151.r12 h=8b6de1b3e36a

`indicates`

c3 verified · fact Temperature sensor fault

Short circuit or open wire on the heat sink temperature sensor.

SI4548-6048-US-BE-en-21W tbl=151.r12 h=8b6de1b3e36a

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

`affects`

c4 drafted · lead Temperature sensor

SI4548-6048-US-BE-en-21W tbl=151.r12 h=8b6de1b3e36a

`applies_to`

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

SI4548-6048-US-BE-en-21W tbl=151.r12 h=8b6de1b3e36a

Data