Partner Academy · Deye
Fault
F2
DC Insulation Failure
Low DC insulation resistance
Deye service: DC Insulation Failure — megger to earth (Riso > 1 MΩ).
Field checks
- Measure DC insulation resistance to earth with a megger (target Riso > 1 MΩ).
- Find damaged cable or moisture ingress in MC4 connectors.
- Do not raise trip thresholds to hide a real earth fault.
FAQ
What does Deye F2 mean?
Low DC insulation resistance
What should I check for Deye F2?
- Measure DC insulation resistance to earth with a megger (target Riso > 1 MΩ).
- Find damaged cable or moisture ingress in MC4 connectors.
- Do not raise trip thresholds to hide a real earth fault.
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.