Partner Academy · Deye
Warning
W28
BMS Data Abnormal Warning
Abnormal BMS data received
Deye service: BMS Data Abnormal — Lithium Mode / cell data.
Field checks
- Verify the selected lithium / BMS protocol (Lithium Mode).
- Confirm cell parameters display correctly on the HMI / logger.
FAQ
What does Deye W28 mean?
Abnormal BMS data received
What should I check for Deye W28?
- Verify the selected lithium / BMS protocol (Lithium Mode).
- Confirm cell parameters display correctly on the HMI / logger.
When should I contact Inversol?
After noting the exact code, model, SN, and operating mode, complete the field checks. If the code returns after a clean power cycle, contact Inversol WhatsApp support with a photo of the display.
Partner lookup — not a substitute for the official Deye service manual or live measurements. Firmware maps can differ by model family.