Sunfree Series- 56 -Chapter 7 Fault Code and TroubleshootingCode Fault Information Explanation Fault type01 Relay Err Relay Error Error02 GFCI Device Err GFCI Devices Error Error03 Fan Err Fan Error Error04 Eeprom Err Storer Error Error05 Lost Com.M<->S Err Interior Communication Error06 ISO Err Insulation Error Error07 Temp.High Err High Temperature Error08 Temp.Low Err Low Temperature Error09 Bus Volt.High Err Bus Voltage High Error10 Bus Volt.Low Err Bus Voltage Low Error11 GFCI Err GFCI Error Error12 DCI Err DCI Devices Error Error13 HWBus Volt.High Err Bus Voltage High Of Hardware Error14 HWPV1 Curr.High Err PV1 Current High of Hardware Error15 HWPV2 Curr.High Err PV2 Current High of Hardware Error16 HWInv Curr.High Err Inverter Current High of Hardware Error17 Inv Short Err Inverter short circuit error Error18 Over Load Err Output overload error Error19 PV1 Volt.High Err PV1 Voltage High Error20 PV2 Volt.High Err PV2 Voltage High Error21 PV1 Curr.High Err PV1 Current High Error22 PV2 Curr.High Err PV2 Current High Error23 SPS Err Auxiliary power error Error24 EPO Err Emergency stop Error25 Grid Volt.High Warn Voltage of Grid High Alarm26 Grid Volt.Low Warn Voltage of Grid Low Alarm27 Grid Freq.High Warn Frequency of Grid High Alarm28 Grid Freq.Low Warn Frequency of Grid Low Alarm