64 Installation and Operating Instructions V01
11 Troubleshooting
When the PV power plant does not operate normally, fault information will be show
up on the display 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 9.3 “Display messages”.
Object
Error
code
Corrective measures
Resumable
Fault
33
•Check the grid frequency and observe how often major fluctuations
occur.
If this faultis caused by frequent fluctuations, try to modify the
operating parameters after informing the utility provider first.
34
•Check the grid voltage and grid connection on the inverter.
•Check the grid voltage at the point of connection of the inverter.
If the grid voltage is outside the permitted range due to local grid
conditions, try to modify the values of the monitored operating
limits after informing the electric utility company first.
If the grid voltage lies within the permitted range and this fault still
occurs, contact the service.
35
•Check the fuse and the triggering of AC circuit breaker in the
distribution box.
•Check grid voltage, grid usability.
•Check AC cable, grid connection on the inverter.
If this fault is still being shown, contact the service.
36
•Make sure the ground 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.
37
•Check the open-circuit voltages of the PV strings, make sure it is
lower than the Max. DC input voltage of the inverter.
If the input voltage lies within the permitted range and the fault still
occurs, contact the service.
