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7.Trouble shooting
Problem
Possible causes
How to correct
OVER CURRENT
Output/Input current
over supply
Check the output stage of PV inverter for short
circuit or inappropriate wiring
Check if PV Inverter is placed in a
well-ventilated area
LINE FREQ ERROR
Power grid
frequency abnormal
Check the connection of plugs to the power
grid
Check the power grid frequency is normal
PV VOLTS ERROR Input voltage of solar
power module too
low
Check voltage on the solar module is within
operating range (200-360V)
Check there is sunlight available (avoid
evening, dawn, late evening, cloudy or rainy
days)
Check the solar module is not being covered
up by any objects (leaves, buildings etc.)
UTILITY ERROR
Can not detect
voltage from power
grid or is abnormal
Check connection between PV inverter and
power grid
Check power grid voltage is normal (not too
high or too low)