System Manual 11 Troubleshooting
77
us.
If you provide our customer service assistant the following information, it will be of great
help for us to diagnose and solve the problem in your system:
Type and serial number of the MV Station and internal devices
Manufacturer, model and configuration of the PV arrays and upstream & downstream
combiner devices connected to the MV Station
MV Station communication solution
Fault and brief description of the fault phenomenon
A picture of the fault if necessary
11.3 Fault and Troubleshooting on the LCD screen
This section is dedicated to the faults shown on the LCD, possible reasons and
troubleshooting. In case the fault cannot be removed following the instructions in this
section, please contact Sungrow.
DC voltage exceeds the max. DC voltage
Check the configuration of the PV array and reduce the open-circuit voltage of
the PV array
Please contact the installers of the PV arrays
The grid voltage is above the max. grid voltage
Check the grid voltage (or if the grid-connected wire is too thin)
The MV Station automatically reconnects to the grid once the grid voltage
recovers normal
The grid voltage is below the min. grid voltage
Check the grid voltage
Check if the AC cables are securely connected.
The MV Station automatically reconnects to the grid once the grid voltage
recovers normal
Contactor connected to the gird failure
Check the contactor after the device is voltage-free
Stop the MV Station if this fault occurs 5 times per day
The MV Station enters into anti-islanding protection state automatically
The MV Station automatically reconnects to the grid once the grid becomes
normal
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