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8. Test Step
After replacing all defected components, testing steps can be adopted to verify the repair
result and the reliability of the Inverter.
1. Install all of boards/cable/ connector.
2. Check if wires are connected correctly.
3. Apply DC Power from power source with limited current (prefer 1A) to the PV
terminal.
4. After turning on the DC Power(200Vdc), the LCD will light up. If not, please check
the input voltage of the inverter. If the voltage is not equal to the DC power
voltage, please check the PV input connection. If the voltage is equal to the DC
power voltage, please repair main SPS again and restart the test step from step
1.
5. After turning off the DC Power, connect the utility to the grid terminal. The LCD will
light up. If not, please check if the AC SPS’s input voltage is equal to the utility
voltage. If the voltage is not equal to the utility voltage, please check power
connection from grid to the inverter and AC connection from INV board to the BAT
board. If there is no other mistake, repair grid SPS again and restart test step
from step 1.
6. Disconnect the utility, connect the battery and press the ON button for a short
time(less than 1s). The LCD will light up. If not, please check if the battery SPS’s
input voltage is equal to the battery voltage. If not, please check the battery
connection and battery fuse. If there is no other mistake, repair BAT SPS again
and restart from step 1.
7. Turn on the PV simulator and battery breaker, the inverter will charge the battery
from the PV simulator. If not, please repair the boost or the charger of the inverter.
And then, restart from step 1.
8. Turn off the PV simulator and turn on the battery breaker. Press the ON button for
a while until the beep sounds. Then, the inverter will provide AC power to the load.
If not, please repair the discharger of the inverter. And then, restart test step from
step 1.
9. Turn on the PV simulator (voltage should be less than 350Vdc) and grid breaker.
The inverter will feed power to the grid. If not, please repair the boost of the
inverter. Then, restart test step from step 1.
10. Turn on all power sources of PV power, battery, and grid. Then, the inverter will
normally operate.