red-and-yellow-alternating on a Tigo Energy Tigo Cloud Connect Advanced + Tigo Access Point: Auto PV-Safe mode engaged by CCA (only with older MLPE such as MM-ES50 after sustained high current) - rapid-shutdown-like state
Short answer
On a Tigo Energy inverter, red-and-yellow-alternating means: Auto PV-Safe mode engaged by CCA (only with older MLPE such as MM-ES50 after sustained high current) - rapid-shutdown-like state. The inverter keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Auto PV-Safe mode engaged by CCA (only with older MLPE such as MM-ES50 after sustained high current) - rapid-shutdown-like state.
Likely causes:
- Auto PV-Safe mode engaged by CCA (only with older MLPE such as MM-ES50 after sustained high current) - rapid-shutdown-like state.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Safety lockout |
| Engineer needed? | Yes |
The inverter keeps running with some functions stopped.
Resetting itself: unknown.
Manual reset: unknown.
What you can check
- Contact installer.
What the engineer will check
- Remove/replace affected MLPE; power-cycle; contact Tigo if persists.
Who to ask for: PV monitoring / MLPE.
Certification: MCS PV installer; Tigo-trained installer; electrical work to BS 7671.
What you might notice
Sources
- Cloud Connect Advanced (CCA) - LED status information ↗ · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026