6
Commissioning
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6.1 Commission the Inverter
1 ) Remove all covers from the PV array.
2) Check the PV and AC voltage.
3 ) Plug in the PV input.
4 ) Turn on the DC switch.
5 ) If the inverter is connected with PV panel arrays and the input voltage is higher
than 250Vdc, while the AC grid is not connected yet, LCD will display messages in
order as below:
Company info
→
Basic info
→
State info
The LCD will display “ AC V outrange “at State info and the LED turns red.
Please check all information on the LCD, operate by knocks you will see the
different parameters.
Single knock to Light the backlight
→
State info (single knock) Input info
→
(single knock) Output info
6) Turn on the AC breaker between inverter and grid, the system will operate
automatically.
7) Under normal operating conditions, the LCD displays ‘Power: xx.xx Kw’ at State
info, this is the power feed into grid. The LED turns green.
8) Check the time and date of inverter as follow:
Single knock to Light the backlight
→
State info (Thrice knock)
→
Inverter info
(single knock)
→
System Time(double knock), if they are not correct, please set
them, refer to refer to 6.3.4 setting inverter time or 6.4.3 text line d
）
setting date
and time.
9) Finish commissioning.
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6.2 Operation Modes
Normal Mode
In this mode, the inverter works normally and LED turns green.
Whenever the DC voltage is higher than 300Vdc, inverter converts power to grid as
generated by the PV panels;
Whenever the DC voltage is lower than 250Vdc, the inverter will work in waiting
state and attempt to connect the grid. In waiting state the inverter consumes just
enough power generated by the PV panel to monitor the internal system.
Notes: The inverter starts up automatically when DC power from the PV panel is
sufficient.
Fault Mode
The internal intelligent controller can continuously monitor and adjust the system
state. If inverter finds any unexpected conditions such as system fault and inverter
fault, the fault information will be displayed on the LCD. In fault mode the LED turns
red.
Notes: a) Detailed fault information refers to Chapter 9.1 ERROR messages displayed
on LCD.
b) When PV Isolation error occurred in SAA safety standard, the buzzer will give an
alarm every fifteen seconds.
Shutdown Mode
Inverters automatically stop running during periods of little or no sunlight. In
shutdown mode the inverters take no power from the grid and panel, and the LCD
and LED turns off.
Notes: If the PV string DC voltage is too low, the inverter will also turn to Shutdown
Mode.
Derating mode
When AC frequency is higher than 50.3Hz(settable), the inverter will derate its
output power according to the rule.
When user set the output limit command to the inverter, the inverter will also limit
the output according to the setting.
In this derating mode, the LCD will show “DERATING”.
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