Solar · Error codes · SMA Solar Technology AG
9002SMA Solar Technology AG · Sunny Boy (SB 1.5-6.0)
9002 on a SMA Solar Technology AG Sunny Boy: The SMA Grid Guard code entered is incorrect. The operating parameters are still protected and cannot be changed
Short answer
On a SMA Solar Technology AG inverter, 9002 means: The SMA Grid Guard code entered is incorrect. The operating parameters are still protected and cannot be changed. The inverter keeps running.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: The SMA Grid Guard code entered is incorrect. The operating parameters are still protected and cannot be changed.
Part involved: status message.
When it shows: The SMA Grid Guard code entered is incorrect. The operating parameters are still protected and cannot be changed.
Likely causes:
- SMA corrective measures: Enter the correct SMA Grid Guard code.
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 103 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026