11 Troubleshooting
When the PV system does not operate normally, we recommend the following
solutions for quick troubleshooting. If an error occurs, the red LED will light up. The
corresponding corrective measures are as follows:
Object Error
code
Corrective measures
Presumable
Fault
11
• Check the grid frequency and observe how often
major fluctuations occur.
If this fault is caused by frequent fluctuations, try to
modify the operating parameters after informing the
grid operator first.
10
•Check the grid voltage and grid connection on inverter.
• Check the grid voltage at the point of connection of
inverter.
If the grid voltage is outside the permissible range due to
local grid conditions, try to modify the values of the
monitored operational limits after informing the electric
utility company first.
If the grid voltage lies within the permitted range and
this fault still occurs, please call service.
9
• Check the fuse and the triggering of the circuit
breaker in the distribution box.
• Check the grid voltage, grid usability.
• Check the AC cable, grid connection on the inverter.
If this fault is still being shown, contact the service.
7
• Make sure the grounding connection of the inverter
is reliable.
•Make a visual inspection of all PV cables and
modules.
If this fault is still shown, contact the service.
5 • Check the open-circuit voltages of the strings and
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