Delta M70A_263 Error Codes

73 codes from pages 47–76 of the manual

This is the list of fault, warning codes the Delta manual gives for the M70A_263 solar inverter. Find your code below and open it for what the manual says about its causes and what to do.

Fault codes from p. 73

CodeWhat it meansPage
E01 Grid frequency high p. 73
E02 Grid frequency low p. 73
E03 Islanding is detected p. 73
E04 Islanding is detected p. 73
E05 Islanding is detected p. 73
E06 Phase jump of Grid voltage p. 73
E07 Non-linear load in Grid and near to inverter p. 73
E08 Wrong connection in AC plug p. 73
E09 AC breaker is OFF Disconnect in AC plug p. 73
E10 Actual utility voltage is under the UVR setting Incorrect Grid Code or Grid setting Wrong connections in AC plug p. 73
E11 Actual utility voltage is over the OVR setting Incorrect Grid Code or Grid setting p. 73
E25 EPO is operated by user p. 73
E30 Input voltage is over 1000Vdc p. 73
E34 Insulation problem of PV array to ground p. 73
E36 Remote OFF by external communication p. 73
F01 DC Injection p. 74
F02 DC Injection p. 74
F03 DC Injection p. 74
F04 DC Injection p. 74
F05 Temperature High p. 74
F06 Amb Temp Fault p. 74
F07 Temperature Low p. 74
F08 Boost Temp Fault p. 74
F09 Bidir. Temp Fault p. 74
F10 Inverter Temp Fault p. 74
F13 AC RLY Fault p. 74
F14 FW Unmatch p. 74
F15 AC Sensor Fault p. 74
F16 Vdc Sensor Fault p. 74
F17 Idc Sensor Fault p. 74
F18 AC Sensor Fault p. 74
F19 Idc Sensor Fault p. 74
F22 Red COMM Fault p. 74
F23 The internal communication connection is disconnected p. 75
F24 Insulation problem of PV array to ground p. 75
F26 1. Power line is disconnected 2. Current feedback circuit is defective p. 75
F27 RCMU circuit is disconnected p. 75
F28 Grid relay short p. 75
F29 Grid relay open p. 75
F30 Voltage unbalance of DC link p. 75
F31 High bus capacitor voltage p. 75
F32 High bus capacitor voltage p. 75
F33 High bus capacitor voltage p. 75
F34 High bus capacitor voltage p. 75
F35 High bus capacitor voltage p. 75
F36 Surge occurs during operation p. 75
F37 Surge occurs during operation p. 75
F38 Surge occurs during operation p. 75
F39 Surge occurs during operation p. 75
F40 Surge occurs during operation p. 75
F41 Surge occurs during operation p. 75
F42 Phase R / S / T CT is defective p. 75
F43 Phase R / S / T CT is defective p. 75
F44 Phase R / S / T CT is defective p. 75
F45 AC current over range p. 75
F50 The zero crossing circuit is defective p. 75
F51 The inverter circuit is defective p. 75
F52 The boost circuit is defective p. 75
F58 1. AFCI is not installed 2. AFCI self-test is fail p. 75
F59 The inverter detects arcing occurs p. 75

Warning codes from p. 76

CodeWhat it meansPage
F60 DC Current High p. 76
F61 DC Current High p. 76
F70 DC Current High p. 76
F71 DC Current High p. 76
F74 Ext COMM. Fault p. 76
W07 De-rating p. 76
W08 String fault p. 76
W23 String Current Low p. 76
W11 Fan Fail p. 76
W17 DC SPD Fault AC SPD Fault p. 76
W18 DC SPD Fault AC SPD Fault p. 76
W19 Aux Power Fault p. 76
W30 Boost Circuit Fault p. 76

Codes and descriptions are taken from the manufacturer’s manual; page numbers link to the PDF. ManualLib is not affiliated with Delta. Found a mistake? Report an error.