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Installation and Operating Instructions
V02
11 Troubleshooting
When the PV power plant does not operate normally, fault information will
be shown up on the display of the inverter and the red LED will be lit at the
same time.
We recommend the following actions for quick troubleshooting.
The corresponding causes are described in section 9.2 ‛Display messages“.
Object
Error code Corrective measures
Presumable
Fault
6
• Check the open-circuit voltages of the strings and make
sure it is below the maximum DC input voltage of the
inverter.
• If the input voltage is within the permitted range and
the fault still occurs, it might be that the internal circuit
has broken. Contact the service.
33
• 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.
34
•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.
35
• 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.
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