Tigo Energy · A niche brand in the UK. 36 codes across 2 product families, each taken from the manufacturer’s manuals. Tigo Energy technical support ↗
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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
36 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| blinking-green-and-yellow | PV-OFF mode activated manually via connected switch/relay - similar to rapid shutdown (string DC voltage ceases). | Partly | Yes |
| dark-or-unlit-led | System in rapid shutdown / no 12 V power to CCA. | Partly | Yes |
| flashing-green | EI app connected to CCA by Bluetooth / data transfer in progress. | No | Yes |
| flashing-yellow | Discovery in progress (detecting TAPs, configuring optimiser radio); also during optimiser replacement. | No | Yes |
| IE001 | TZ Protect Fault (Over Current Fault). Tigo suggestion: Wait; disconnect and reconnect PV and batteries; contact Tigo. | Yes | Yes |
| IE002 | Grid Lost Fault (Grid Lost Fault). Tigo suggestion: Wait for power to return; check grid voltage in range; (detailed article: inverter POWER blue LED off; check AC breaker and main breaker on). | Yes | Yes |
| IE003 | Grid Volt Fault (Grid Voltage Fault). Tigo suggestion: Wait for reconnection; check grid voltage. | Yes | Yes |
| IE004 | Grid Freq Fault (Grid Frequency Fault). Tigo suggestion: Wait for reconnection. | Yes | Yes |
| IE005 | PV Volt Fault (PV Voltage Fault). Tigo suggestion: If string voltage >600 V DC shut down and troubleshoot strings. | Yes | Yes |
| IE006 | Bus Volt Fault (Buss Voltage Fault). Tigo suggestion: Press ESC to restart; check Voc <600 V DC. | Yes | Yes |
| IE007 | Bat Volt Fault (Battery Voltage Fault). Tigo suggestion: Check battery input voltage. | Yes | Yes |
| IE008 | AC10M Volt Fault (Grid Voltage Fault). Tigo suggestion: Returns to normal when grid normal. | Yes | Yes |
| IE009 | DCI OCP Fault (DCI Overcurrent Protection Fault). Tigo suggestion: Wait for normal. | Yes | Yes |
| IE011 | SW OCP Fault (Software Detection of Overcurrent Fault). Tigo suggestion: Wait; if not, shut down PV, battery and grid and restart inverter. | Yes | Yes |
| IE012 | RC OCP Fault (Overcurrent Protection Fault). Tigo suggestion: Check DC input and AC output impedance; wait. | Yes | Yes |
| IE013 | Isolation Fault (Insulation Fault). Tigo suggestion: Wait; check wire insulation for damage. | Yes | Yes |
| IE014 | Temp Over Fault (Temperature Fault). Tigo suggestion: Check ambient temperature; move or shade equipment. | Yes | Yes |
| IE015 | Bat Con Dir Fault (Battery Connection Fault). Tigo suggestion: Check for reversed battery input lines. | Yes | Yes |
| IE016 | Missed CT Fault (-). Tigo suggestion: No resolution published. | Yes | Yes |
| IE017 | EPS(Off-grid) Overload Fault (EPS(Off-Grid) Over Load Fault). Tigo suggestion: Switch off high-power devices on EPS panel and press ESC to restart. | Yes | Yes |
| IE018 | OverLoad Fault (On-Grid Mode Overload Fault). Tigo suggestion: Switch off high-power device and press ESC. | Yes | Yes |
| IE019 | PV Conn Dir Fault (PV Direction Fault). Tigo suggestion: Check PV input lines not reversed. | Yes | Yes |
| IE020 | BatPowerLow (Battery Power Low Fault). Tigo suggestion: Switch off high-power device, press ESC; charge battery above protection level. | Yes | Yes |
| IE021 | Low Temp (Low Temperature fault). Tigo suggestion: Check ambient temperature. | Yes | Yes |
| IE023 | Charger Relay Fault (Charge Relay Fault). Tigo suggestion: Press ESC to restart. | Yes | Yes |
| IE024 | BMS Lost (Battery Communication Fault). Tigo suggestion: Check battery-inverter comms cables. | Yes | Yes |
| IE025 | Inter Comms Fault (Internal Communication Fault). Tigo suggestion: Shut down PV, battery and grid; reconnect. | Yes | Yes |
| IE026 | Fan Fault (Fan Fault). Tigo suggestion: Check for foreign matter in fan. | Yes | Yes |
| IE027 | Earth Relay Fault (EPS(Off-Grid) Earth Relay Fault). Tigo suggestion: Press ESC to restart. | Yes | Yes |
| IE029 | RCD Fault (Residual Current Device Fault). Tigo suggestion: Check DC/AC impedance; disconnect/reconnect PV and batteries. | Yes | Yes |
| IE030 | EPS(Off-grid) Relay Fault (EPS(Off-Grid) Relay Failure). Tigo suggestion: Disconnect PV, grid and batteries then reconnect. | Yes | Yes |
| IE031 | Grid Relay Fault (Electrical Relay Failure). Tigo suggestion: Disconnect PV, grid and batteries then reconnect. | Yes | Yes |
| red-and-yellow-alternating | Auto PV-Safe mode engaged by CCA (only with older MLPE such as MM-ES50 after sustained high current) - rapid-shutdown-like state. | Partly | Yes |
| solid-red | CCA cannot connect to network or Tigo server (wrong password, firewall, weak signal) or cannot complete discovery (fewer TAPs than specified). | Partly | Yes |
| solid-yellow | Warning: discovery not initiated, or completed with errors (TAP count not set, <75% optimisers found), or internet not allowing upload. | Partly | Yes |
| steady-green | System OK: discovery complete, required TAPs and at least 75% of optimisers found, internet upload working. | No | Yes |