Info fault code
Deye fault (F) code reference
Symptom: The inverter LCD or DeyeCloud shows an F-code (e.g. F13, F18, F58) and you need to know where to start.
Deye SUN-series inverters report faults as F-codes. The list below covers the ones you’ll see most often and where to look first. Meanings vary slightly by model and firmware — confirm the exact definition in that model’s user manual before acting.
| Code | Usually means | First check |
|---|---|---|
| F13 | Grid abnormal / grid mode changed | Grid V & F vs the AS/NZS 4777.2 window; region/grid-code setting → see F13 |
| F18 | AC hardware over-current | Output wiring / load surge; power-cycle; recurring = service |
| F22 | Emergency stop / remote shutdown | DRM / remote-off input, external stop loop |
| F23 | Leakage (residual) current high | Insulation/earthing on PV & AC; moisture in connectors |
| F24 | DC insulation (ISO) low | PV array isolation to earth; wet MC4/D4 connectors |
| F26 | DC bus abnormal | Power-cycle; check PV/battery DC; recurring = service |
| F29 | Parallel communication fault | Parallel comms cable & termination between units |
| F35 | No AC grid detected | Grid breaker/supply present? AC wiring landed? |
| F58 | BMS communication fault | Battery comms cable on the BMS port; battery on → see battery not charging |
| F64 | Heatsink / IGBT over-temperature | Ventilation, ambient temp, derating; clear airflow |
General approach
- Read the exact code and description on the LCD / DeyeCloud alarm.
- Power-cycle cleanly (AC off → DC off → battery off, then reverse) — transient faults often clear.
- If it recurs, capture a photo of the alarm and the wiring and call Suncloud support.
This is an orientation aid, not a substitute for the manual. Don’t bypass a protection fault — F23/F24 in particular point to genuine insulation/earthing issues that must be resolved, not reset away.
