3x6A on a SolarEdge HD-Wave single-phase inverter: The device is locked, due to either human intervention, or automatically due to one or more safety features
Short answer
On a SolarEdge inverter, 3x6A means: The device is locked, due to either human intervention, or automatically due to one or more safety features. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: The device is locked, due to either human intervention, or automatically due to one or more safety features.
Part involved: Safety lock (manual or automatic).
Likely causes:
- Manual lock.
- Automatic lock by a safety feature (cause must be identified).
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Safety lockout |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: yes - OFF/ON to reconnect after the cause is known.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Ask the installer why it locked before resetting.
- If the code persists, contact the installer. SolarEdge's list says 'OFF/ON to reconnect' for some codes - that means the inverter's own ON/OFF switch; only use it if your installer has shown you how. Never open the inverter or touch DC cables/connectors.
What the engineer will check
- Establish which safety feature locked the unit (check event log).
- OFF/ON to reconnect.
- Contact SolarEdge support.
Who to ask for: PV installer.
Certification: Electrician competent in grid-connected PV (BS 7671 Section 712; IET Code of Practice for Grid-connected Solar PV), ideally the original MCS-certified PV installer; brand-approved/trained installer to keep manufacturer warranty.
What you might notice
Sources
- User Guide: SolarEdge Inverters Error Codes and Troubleshooting, Version 1.1 (January 2026) ↗ · 1.1 · page PDF p.5 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026