SUN-5-12K-SG01HP3-EU-DM2 three-phase hybrid (F-series table)
Deye F17 error code
PV input overcurrent.
Likely causes
- PV array short-circuit current above the input limit
- Too many parallel strings on one MPPT
- PV wiring fault or shorted string
- Unstable PV voltage
Checks to run, in order
- 1Measure string current and compare with the datasheet limit
- 2Check the PV connection and insulation
- 3Check for a shorted string
Fixes
- Reduce the strings per MPPT to within the limit
- Repair the PV wiring
- Restart the inverter
When to escalate
If PV current is within the input rating and F17 persists, the PV current sensor needs distributor testing.
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 F17 mean?
PV input overcurrent.
How do I fix Deye F17?
Reduce the strings per MPPT to within the limit Repair the PV wiring Restart the inverter
When should I escalate Deye F17?
If PV current is within the input rating and F17 persists, the PV current sensor needs distributor testing.
Can I reset Deye F17 myself?
Only after isolating the AC and DC sides and running the checks above. If Deye F17 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Deye F17?
Deye F17 is documented for SUN-5-12K-SG01HP3-EU-DM2 three-phase hybrid (F-series table). 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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