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Partner Academy · Deye

Fault F42

Parallel Version Fault

Parallel units firmware mismatch

Deye service: Parallel Version Fault — unify firmware across the cluster.

Field checks

  1. Update firmware on all paralleled inverters to the same version.

FAQ

What does Deye F42 mean?
Parallel units firmware mismatch
What should I check for Deye F42?
  1. Update firmware on all paralleled inverters to the same version.
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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