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Partner Academy · Deye

Fault F1

DC Inversed Fault

Reverse DC (PV) polarity fault

Deye service: DC Inversed Fault — reverse PV polarity.

Field checks

  1. Open the DC isolator.
  2. Check MC4 polarity with a multimeter and reconnect + to +, − to −.

FAQ

What does Deye F1 mean?
Reverse DC (PV) polarity fault
What should I check for Deye F1?
  1. Open the DC isolator.
  2. Check MC4 polarity with a multimeter and reconnect + to +, − to −.
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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