Three-phase photovoltaic grid-connected inverter Fault isolation
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Table 8-1 Inverter fault code
Fault code Prompt in English
Instruction
Fault analysis
A
A001
Input UV
Input undervoltage
DC input PV1undervoltage
DC input PV2undervoltage
A002
Bus UV
Bus undervoltage
DC input
A003
Grid UV
AC undervoltage
Public grid voltage is too low
A004
Grid OV
AC overvoltage
Public grid voltage is too high
A005
Grid UF
AC under-frequency
Public grid frequency is too low
A006
Grid OF
AC over-frequency
Public grid frequency is too high
A007
Clock Fail
Clock error
Inverter clock setup error
A009
Cmd Shut
Manual turn-off
Stop the inverter via manual operation
on keypad or upper PC
A011
Grid Loss
Grid loss
Check whether inverter AC wiring is
good
E
E001
Input OV
Input overvoltage
DC input overvoltage
E003
Bus OV
Bus overvoltage
Inverter internal bus overvoltage
E004
Boost Fail
Boost fault
Inverter boost circuit fault
E005
Grid OC
AC overcurrent
Inverter internal AC output overcurrent
E006
OTP
Overheat
Inverter internal temperature is too high
E007
Riso Low
Insulation impedance is
too low
The system insulation impedance of
inverter external interface is too low
E008
IGBT drv
IGBT drive protection
Inverter IGBT drive protection
E009
IntComm
Internal communication
error
Master/slave DSP cannot communicate
Master/slave DSP data check error
E010
ILeek Fail
Current leakage is too
large
System or inverter current leakage is
too large
E011
Relay Fault
Relay fault
Inverter internal relay fault
E012
Fan Fail
Fan fault
Inverter internal fan fault
E013
Eeprom
Memory abnormal
Inverter internal memory fault
E014
Dc inject
The DC component in The DC component in AC output is too
