Firman Zero E (E201001) error codes
18 codes from the official Firman manual (ZERO E (model E201001) Portable Power Station), each with the manual page. For 1 of them the manual says to contact an authorized service dealer.
Applies to: Firman Zero E (E201001).
| Code | What it means | What to do | Service | Manual |
|---|---|---|---|---|
| 01 USB1~USB4 over current / short circuit | Over-current or short circuit on USB1 through USB4 output ports. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 02 USB-C (99W) over current / short circuit | Over-current or short circuit on the USB-C (99W) output port. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 03 USB-C (99W) (In & Out) over current / short circuit | Over-current or short circuit on the USB-C (99W) port used for input and output. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 04 DC-12V Cigarette Lighter & DC5521 over current / short circuit | Over-current or short circuit on the DC-12V cigarette lighter outlet or the DC5521 output. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 05 Inverter protection | Inverter overcurrent, overload, short-circuit, or over-voltage protection, or AC output overload in grid mode. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 06 Over-temperature protection of inverter | The inverter has overheated and its over-temperature protection has activated. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 07 Abnormal communication of battery | Communication with the battery has failed or is abnormal. | Check whether the output port is overloaded or short-circuited. | owner | p. 21 |
| 08 EC5 input/output fault | Abnormal input voltage, output over-power, output overcurrent, over-temperature, or communication fault on the EC5 solar/car input. | Check whether the input voltage meets the input range requirements. | owner | p. 21 |
| 09 Over-voltage protection of the system | The system has detected an over-voltage condition. | Disconnect the input power source. | owner | p. 21 |
| 10 Under-voltage protection of the system | The system has detected an under-voltage condition. | The system will automatically cut off all outputs. | owner | p. 21 |
| 11 Overload protection of the system / Over-temperature protection of DC module | The system is overloaded, or the DC module has overheated. | Check whether the output power exceeds the maximum allowable value. Check whether expansion packs are properly mounted. | owner | p. 21 |
| 12 Abnormal wireless charger | The wireless charger is not operating normally. | Check whether any metal objects are on the charging pad. | owner | p. 21 |
| 13 Abnormal AC charging | AC charging is not operating normally. | Check whether the electricity power grid works properly. | owner | p. 21 |
| 14 Abnormal Fan status | The fan is not working or is abnormal. | Check whether the fans are not working or blocked. | owner | p. 21 |
| 15 Abnormal Paralleling | A fault in the paralleling connection between two ZERO E units. | Check whether parallel cables are properly plugged in. Check whether the output is overloaded or short-circuited. | owner | p. 21 |
| 16 Internal error | An internal fault has been detected in the unit. | Contact Customer Service. | dealer | p. 21 |
| HI High-temperature protection of battery | The battery is too hot and high-temperature protection has activated. | Check whether the unit is working in a high ambient temperature environment. | owner | p. 21 |
| LO Low-temperature protection of battery | The battery is too cold and low-temperature protection has activated. | Check whether the unit is working in a cold ambient temperature environment. | owner | p. 21 |
Source: official Firman 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.