Deye Error Codes
8 diagnostic articles for Deye inverters — verified against manufacturer documentation.
Warning
Deye Inverter F56 — DC Busbar Voltage Too Low at Startup?
F56 means the DC busbar voltage inside your Deye inverter is too low. Deye’s…
Read diagnosis →
Critical
Deye Inverter F20 — DC Overcurrent Fault, Causes and Safe Fixes
F20 is a hardware-level DC overcurrent fault: your Deye inverter measured more current on…
Read diagnosis →
Warning
Deye Inverter Warning W31 — Is Your Battery Still Talking to It?
W31 (Battery_comm_warn) is a warning — not a shutdown fault — telling you that…
Read diagnosis →
Warning
Deye Inverter F05/F06 — EEPROM Memory Errors Explained
F05 and F06 are internal memory faults: your Deye inverter failed to read (F05)…
Read diagnosis →
Warning
Deye Inverter Error F15 — Is It Serious? How to Respond
Error F15 on a Deye inverter is an “AC firmware over current” fault —…
Read diagnosis →
Warning
Deye Inverter Error F35 — No AC Grid Detected
F35 means your Deye inverter cannot detect the AC grid — “no AC grid”…
Read diagnosis →
Warning
Deye Inverter F26 — What a DC Busbar Unbalance Fault Means
F26 means the DC busbar inside your Deye inverter is unbalanced — the internal…
Read diagnosis →
Critical
Deye Inverter Error F02/F24 — DC Insulation Impedance Fault Explained
F02 and F24 both mean your Deye inverter measured dangerously low insulation resistance between…
Read diagnosis →