Partner Academy · Deye
Fault
F55
DC Voltage Too High
Dangerously high DC voltage
Deye service: DC Voltage Too High — same Voc path as F32.
Field checks
- Measure PV string voltage.
- Reduce series modules until voltage is within the safe operating window.
FAQ
What does Deye F55 mean?
Dangerously high DC voltage
What should I check for Deye F55?
- Measure PV string voltage.
- Reduce series modules until voltage is within the safe operating window.
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.