29001 on a SMA Solar Technology AG Sunny Boy: The entered SMA Grid Guard code is valid. The parameters protected with the SMA Grid Guard code can now be set. 11.3 Checking the PV System for Ground Faults A ground fault may be present if the inverter beeps, the red LED lights up and the event numbers 3501, 3601 or 3701 are being displayed in the Results menu on the inverter user interface. The electrical insulation from the PV system to ground
Short answer
On a SMA Solar Technology AG inverter, 29001 means: The entered SMA Grid Guard code is valid. The parameters protected with the SMA Grid Guard code can now be set. 11.3 Checking the PV System for Ground Faults A ground fault may be present if the inverter beeps, the red LED lights up and the event numbers 3501, 3601 or 3701 are being displayed in the Results menu on the inverter user interface. The electrical insulation from the PV system to ground. The inverter keeps running.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: The entered SMA Grid Guard code is valid. The parameters protected with the SMA Grid Guard code can now be set. 11.3 Checking the PV System for Ground Faults A ground fault may be present if the inverter beeps, the red LED lights up and the event numbers 3501, 3601 or 3701 are being displayed in the Results menu on the inverter user interface. The electrical insulation from the PV system to ground.
Part involved: status message.
When it shows: The entered SMA Grid Guard code is valid. The parameters protected with the SMA Grid Guard code can now be set. 11.3 Checking the PV System for Ground Faults A ground fault may be present if the inverter beeps, the red LED lights up and the event numbers 3501, 3601 or 3701 are being displayed in the.
Is it safe?
| Does the inverter stop? | No |
|---|---|
| Severity | Information only |
| Engineer needed? | No |
The inverter keeps running.
Resetting itself: yes.
Manual reset: Automatic when condition clears.
What you can check
- Information message only - no action needed.
What the engineer will check
- Informational (commissioning/configuration).
Sources
- Operating manual SUNNY BOY 3.0/3.6/4.0/5.0/6.0 ↗ · SBxx-1AV-41-BE-en-21 Version 2.1 · page 104 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026