17
4.2.8 Fault status
(Displayed for 5 seconds)
Display Type of error
Fault number : number of times
Fault status
4.3 Operation method
4.3.1 Check points prior to operation
-. Check the wiring and installation status of the inverter.
-. Especially, check that input polarity of solar module has been connected correctly and the line to grid has
been connected correctly.
-. Direct power of solar panel is supplied to the inverter and AC power status is checked, then the inverter
operates automatically after 300 seconds
(If necessary, a DC circuit breaker can be installed outside the inverter)
4.3.2 Automatic operation
The inverter is set to auto-operation mode as default setting when shipped from the factory.
The inverter operates automatically when the voltage of the solar panel is over setting value after sunrise and the
inverter stops automatically when voltage of the solar panel is under setting value after sunset.
The inverter always monitors the grid power and it stops automatically in abnormal status.
5. Function
5.1 Descriptions
5.1.1 Grid monitoring
Whether the system voltage is normal or abnormal is determined by the difference from the normal voltage (Fault
high voltage, Fault low voltage), and if this value is higher or lower than the specified value, it stops the inverter.
If the frequency of system voltage is off the line frequency by line fault frequency, it stops the inverter’s operation.
In order to start the generation at the normal system status, it operates with the system after the line transition time
elapses. Frequency of used system voltage can be set in accordance with the frequency band.
5.1.2 MPPT control and total power generation
As the output of solar panel varies on surrounding temperature, humidity and solar ray intensity, MPPT
(Maximum Power Point Tracking) algorithm should be carried out smoothly. The method applied to this product
does not show the fluctuation in current, and it stops the inverter when the solar cells reach the PV stop voltage
and the inverter cannot be operated anymore.
[001] E008
Under Voltage
