Fault Code Reference

Tigo Fault Codes

Tigo module-level power electronics including TS4 optimisers and TAP monitoring. Used alongside string inverters to add per-panel monitoring and safety.

6
Fault codes
Device types covered
Inverter (6)

Common fault codes

CCA-01
CCA Offline / Red LED
Confirm router is online. Run Network Test via EI App > Settings > Network Test.
CCA-02
CCA No LED / No Power
Check AC breaker for the CCA circuit. Check DIN-rail power supply LED — green = …
TAP-01
TAP Not Detected
Run TAP Test in EI App > Settings > TAP Test. Check RS-485 A/B polarity — not re…
TS4-01
Module Grey Icon / Not Discovered
Confirm CCA/TAP running. Confirm all serial numbers entered in EI App. Wait 60 m…
TS4-02
PV-Safe Mode Activated
Check EI Portal Alerts page for specific alert code. Do NOT clear PV-Safe withou…
RSS-01
RSS Transmitter Not Sending Keep-Alive
Check RSS Transmitter LED — leader: solid red + blinking green; follower: blinki…

All Tigo fault codes

CCA-01
CCA Offline / Red LED
Confirm router is online. Run Network Test via EI App > Settings > Network Test.
CCA-02
CCA No LED / No Power
Check AC breaker for the CCA circuit. Check DIN-rail power supply LED — green = …
TAP-01
TAP Not Detected
Run TAP Test in EI App > Settings > TAP Test. Check RS-485 A/B polarity — not re…
TS4-01
Module Grey Icon / Not Discovered
Confirm CCA/TAP running. Confirm all serial numbers entered in EI App. Wait 60 m…
TS4-02
PV-Safe Mode Activated
Check EI Portal Alerts page for specific alert code. Do NOT clear PV-Safe withou…
RSS-01
RSS Transmitter Not Sending Keep-Alive
Check RSS Transmitter LED — leader: solid red + blinking green; follower: blinki…
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