18
Grid failure
Grid Fault
Grid measured data is beyond the
specification (voltage & frequency).
Abnormal Grid Impedance
Impedance
Fault
1.
Grid impedance higher than the
permissible value.
2.
Grid impedance change is higher
than limit.
No grid utility voltage
No Utility
1.
Inverter is not connected to grid
2.
Grid is absent.
DC-Input voltage too high
PV Over
Voltage
DC-Input voltage higher than the
permissible 500V.
Inverter failure
Consistent failure
Consistent
Fault
The readings of 2 microprocessors
are not consistent. It is probably
caused of CPU and/or other circuit
do not function well.
Bus failure
DC Bus High
DC Bus Low
DC-Bus voltage too high or too low.
Device failure
Device Fault
The device is unable to return to
normal status.
Temperature too high
Over
Temperature
The internal temperature is higher
than specified normal value.
