Troubleshooting Of Faults In Lcd Screen - Sungrow SG2K5TL User Manual

SG2K5TL/SG3KTL/SG4KTL-31
Phenomenon
"Fault" indicator
is on
9.1.2

Troubleshooting of Faults in LCD Screen

Fault Code
Vdc-high
Vac-low
Vac-high
F-fault
PM-fault
No-grid
User Manual
Causes
There exists a malfunction that
not been cleared off.
Cause
The DC input voltage of the
inverter exceeds allowable
threshold.
The grid voltage falls below the
allowable minimum grid
voltage threshold of the
installation country.
The grid voltage exceeds the
allowable maximum threshold
of the installation country.
The grid frequency exceeds
the permissible range.
There may be malfunctions of
internal modules of inverter.
Grid is not present.
44
Troubleshooting
Sungrow service dept..
Perform troubleshooting in according to
fault type in LCD screen. See "9.1.2
Troubleshooting of Faults in LCD Screen".
Troubleshooting
1. Rotate the DC switch to the "OFF"
position immediately.
2. Measure the open circuit voltage of PV
string again. Decrease the number of PV
modules in the PV string if the voltage
measured is not permissible.
3. Reconnect the DC cables to the inverter
and start up the inverter.
4. If the fault still exists, contact Sungrow
service dept..
1. Check the voltage of the grid.
2. If the grid voltage exceeds the
permissible range of inverter protective
parameters, ask utility grid company for
solution.
3. If the grid voltage is within the permissible
range, contact Sungrow service dept..
1. Check the frequency of the grid.
2. If the grid frequency exceeds the
permissible range of inverter protective
parameters, ask utility grid company for
solution.
3. If the grid voltage is within the permissible
range, contact Sungrow service dept..
Contact Sungrow service dept. for solution.
1. Check whether AC circuit breaker is
triggered.
2. Check whether AC cables are all firmly
connected.
3. Check whether grid is not on service.
4. If all conditions are OK and this