EcoFlow RIVER 2 Pro / RIVER 2 Max error codes
12 codes from the official EcoFlow manual (RIVER 2 Max), each with the manual page.
Applies to: EcoFlow RIVER 2 Pro, EcoFlow RIVER 2 Max.
| Code | What it means | What to do | Service | Manual |
|---|---|---|---|---|
| AC output high temperature | Indicator flashes because the product is too hot for AC output, typically from blocked airflow. | Ensure the air inlet and outlet are unobstructed. Normal operation resumes automatically after the temperature decreases. If the warning persists after restart, stop using the product. | owner | p. 11 |
| AC output low temperature | Indicator flashes because the product is too cold for AC output. | Normal operation resumes automatically when the product warms up. If the warning persists after restart, stop using the product. | owner | p. 11 |
| AC output overload | Indicator flashes because the AC output is overloaded. | Disconnect overloading devices and restart the product. The sum power of loaded appliances must not exceed the rated power (see X-Boost section for limits in X-Boost mode). If the warning persists after restart, stop using the product. | owner | p. 11 |
| Battery charging high temperature | Indicator flashes because the battery is too hot for charging. Charging is paused while the battery is hot. | Normal operation resumes automatically after the battery cools down. If the warning persists after restart, stop using the product. | owner | p. 11 |
| Battery charging low temperature | Indicator flashes because the battery is too cold for charging. Charging is paused until the battery temperature recovers. | Normal operation resumes automatically after the battery temperature is restored to above 3°C. If the warning persists after restart, stop using the product. | owner | p. 11 |
| Battery discharge high temperature | Indicator flashes because the battery is too hot for discharging. Output is paused until the battery cools down. | Normal operation resumes automatically after the battery cools down. If the warning persists after restart, stop using the product and do not charge or discharge it. | owner | p. 11 |
| Battery discharge low temperature | Indicator flashes because the battery is too cold for discharging. Output is paused until the battery warms up. | Normal operation resumes automatically when the battery warms up. If the warning persists after restart, stop using the product and do not charge or discharge it. | owner | p. 11 |
| Charging overload | Indicator flashes because the charging input is overloaded. | Remove the charging cable. Normal operation resumes automatically after restart. If the warning persists after restart, stop using the product. | owner | p. 11 |
| Communication failure between main control board and AC | Indicator flashes because the main control board and the AC section are not communicating. | Normal operation resumes automatically after restart. If the warning persists after restart, stop using the product. | owner | p. 11 |
| Failure of communication between main control board and AC | Indicator flashes when the main control board and the AC module cannot communicate. | Restart the product. Normal operation resumes automatically after restart. If the warning persists after restart, stop using the product and consult EcoFlow customer service. | owner | p. 11 |
| Fan blocked | Indicator flashes because the cooling fan is blocked. | Check whether the fan is blocked by foreign objects and remove them. If the warning persists after restart, stop using the product. | owner | p. 11 |
| USB-C or car charging output overload | Indicator flashes because the USB-C or car charging output is overloaded. | Disconnect overloading devices and restart the product to resume normal operation. If the warning persists after restart, stop using the product. | owner | p. 11 |
Source: official EcoFlow manual, read 2026-11-01. "Owner" means the manual lists steps you can take; "dealer" means it directs you to authorized service. Fuel, gas and electrical work on generators is for qualified technicians; follow the manual's safety section.