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Partner Academy · Deye

Fault F28

DCIOver M1/M2 Fault

MPPT1 / MPPT2 overcurrent fault

Deye service: DCIOver M1/M2 — balance MPPT currents.

Field checks

  1. Check current distribution across MPPT trackers.
  2. Reduce current on the overloaded MPPT channel.

FAQ

What does Deye F28 mean?
MPPT1 / MPPT2 overcurrent fault
What should I check for Deye F28?
  1. Check current distribution across MPPT trackers.
  2. Reduce current on the overloaded MPPT channel.
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.

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