Yoshino B4000 SST / B2000 SST / B660 SST / B330 SST error codes
10 codes from the official Yoshino manual (B330 SST), each with the manual page. For 1 of them the manual says to contact an authorized service dealer.
Applies to: Yoshino B4000 SST, Yoshino B2000 SST, Yoshino B660 SST, Yoshino B330 SST.
| Code | What it means | What to do | Service | Manual |
|---|---|---|---|---|
| AC/Solar/Car charging high temperature protection | Charging input is too hot, so charging is protected. | After the product cools down, it will resume normal operation automatically. | owner | p. 19 |
| AC/USB-C PD/DC output high temperature protection | The product is too hot while supplying AC, USB-C PD, or DC output, so that output is protected. | After the product cools down, re-press the AC/USB/DC power button. It will resume normal operation automatically. | owner | p. 19 |
| AC/USB-C/USB-C PD/DC output overload protection | The load on an AC, USB-C, USB-C PD, or DC output exceeds the rated power, so that output is protected. | Remove the overloaded device and re-press the AC/USB/DC power button. It will resume normal operation automatically. Use electrical appliances within rated power. | owner | p. 19 |
| Battery Failure | A battery alarm prompt appears on the LCD during use. It indicates a battery fault. | If the prompt appears and does not disappear after restarting, stop using the product immediately and contact Yoshino customer service. | dealer | p. 19 |
| Battery charging high temperature protection | The battery is too hot while charging, so charging is protected. Charging stops during the protection. | Charging can be resumed automatically after the battery cools down. Wait for the battery to cool. | owner | p. 19 |
| Battery charging low temperature protection | The battery is too cold while charging, so charging is protected. | Charging can be resumed automatically after battery temperature rises above 0°C (32°F). | owner | p. 19 |
| Battery discharged high temperature protection | The battery is too hot while discharging, so the product shuts down after a warning. | Discharging can be resumed automatically after the battery cools down. | owner | p. 19 |
| Battery discharged low temperature protection | The battery is too cold while discharging, so the product shuts down after a warning. | The product will shut down after warning. Discharging can be resumed automatically after battery temperature rises above 0°C (32°F). | owner | p. 19 |
| DC Adaptor/USB-C PD/Car/XT60 charging high temperature protection | The product is too hot while charging through the DC adapter, USB-C PD, car, or XT60 input, so charging is protected. | After the product cools down, it will resume normal operation automatically. | owner | p. 19 |
| USB output overload protection | The device connected to a USB output port draws more than the port can supply, so USB output is protected. | Remove the device connected to the USB-A port. Re-press the USB power button, and it will resume normal operation automatically. | owner | p. 19 |
Source: official Yoshino manual, read 2026-11-02. "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.