Faults
Diagnosis and solution
SW_OVP_Boost
SW_OVP_ACR
SW_OVP_BUS
Iso l Fault
SW_OCP_DCI
Boost over voltage detected by software.
• Check the PV input,make sure the Max.DC voltage is ＜950V.
• Or seek help from us.
SW_OVP_Boost I
SW_OVP_Boost II
SW_OVP_ACS
SW_OVP_ACT
SW_UVP_ACR
SW_UVP_ACS
SW_UVP_ACT
SW_OFP_AC
SW_UFP_AC
SW_UFP_ACR
SW_UFP_ACS
SW_UFP_ACT
SW_OFP_ACR
SW_OFP_ACS
SW_OFP_ACT
Iso Il Fault
RelayShortFault
RelayOpenFault
Over current/voltage of each phase in AC side detected
• If one of the fault happens frequently,please contact with the
dealer to check the nearest transformer.
by software.
• Or seek help from us.
Bus over voltage detected by software.
• Check the PV input,make sure the Max.DC voltage is ＜950V.
• Or seek help from us.
• If this happens frequently,please contact with the grid Corp.,
get the password to set the value.(VDE4105)
• Or seek help from us.
The grid frequency is out of limit.
Isolation fault in boost circuit.
• Please check the PV input wire.
• Or seek help from us,
The relay in the inverter is fault.
• Please contact with us.
DCI current over limit.
• Please contact with us.
Faults
Diagnosis and solution
SW_OCP_RCD_Jump II
SW_OVP_ACRMS
SW_OverTemp
Residual current detector device fault or residual current
• Check the impedance of DC input and AC output.
• Or seek help from us.
SW_OCP_RCD
SW_OCP_RCD_Jump I
SW_IACRMS_Unblance
SW_FAN I fault
The RMS value of AC current is over limit.
• If this happens frequently,please contact with us.
Temperature is over limit.
• Or seek help from us.
The RMS value of AC current not balance.
SW_OCP_RCD_Jump III
SW_OCP_RCD_300mA
over limit,
• Check if fan is running normally.
• Check if the environment temperature is over limit.
Fan fault.
• Or seek help from us.
• Check if fan is running normally.
• Check if anything block the fan.
SW_FAN II fault
SW_FAN III fault
UnRecover_LN_Fault
The L and N line is not correctly connected.
• Or seek help from us.
• Check the connection of L and N.
Auto_Test_Fault
Auto test failed.(For Italy)
SW_BUS_Unblance
Bus not balance.
• Contact with us if this happens frequently.
PhaseDelta Fault
Phase fault.
• Contact with us if this happens frequently.
Control Loop ERR
Controller fault.
• Contact with us if this happens frequently.
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7 Troubleshooting 7 Troubleshooting
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