35
time, it will also check whether the DC input of PV modules is sufficient. The
inverter will turn into normal operation mode when both of AC and DC
conditions are fulfilled. The inverter will disconnect from the power grid and
switch to standby mode when the sunlight is weak and power generation is
small. The inverter will try to reconnect to the power grid and generate power
again when the voltage of PV modules is stable and higher than the set point.
4.5 Fault shutdown
The inverter will be shut down automatically when the PV power
generation system fails, such as output short circuit, grid overvoltage /
undervoltage, grid overfrequency / underfrequency, high ambient temperature
or internal malfunction of the machine.
The causes of fault can be identified based on the faults listed in Table 4-1.
Proper treatment is recommended before contacting after-sales service. There
are mainly 3 types of faults: alarm, protection and hardware fault.
