SG04LP3/SG05LP1 hybrid families and SG01HP3-EU-DM2
Deye F16 error code
Leakage current (GFCI) fault.
Likely causes
- PV cable or connector leakage to earth
- Moisture in the array or AC wiring
- Faulty appliance leaking to earth
- Leakage sensor drift
Checks to run, in order
- 1Check the PV-side cable ground connection
- 2Megger the PV strings to earth
- 3Check the backup circuits for earth leakage
- 4Restart and observe
Fixes
- Clear the leakage path and dry wet parts
- Restart the system two to three times
- Disconnect suspect loads one at a time
When to escalate
If leakage is cleared but F16 returns, the GFCI sensor or output filter needs distributor attention.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does Deye F16 mean?
Leakage current (GFCI) fault.
How do I fix Deye F16?
Clear the leakage path and dry wet parts Restart the system two to three times Disconnect suspect loads one at a time
When should I escalate Deye F16?
If leakage is cleared but F16 returns, the GFCI sensor or output filter needs distributor attention.
Can I reset Deye F16 myself?
Only after isolating the AC and DC sides and running the checks above. If Deye F16 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Deye F16?
Deye F16 is documented for SG04LP3/SG05LP1 hybrid families and SG01HP3-EU-DM2. Confirm the code on your own unit's display or manual before ordering parts.
More Deye error codes
- Deye F01PV input polarity is reversed at one or both DC inputs.
- Deye F02PV insulation resistance to earth is below the safety limit.
- Deye F03Ground fault detected on the PV array (GFDI).
- Deye F04GFDI ground-failure alarm: the PV array or inverter is not properly earthed.
- Deye F05Control-board EEPROM read failure.
- Deye F06Control-board EEPROM write failure.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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