Hopewind hopeSun 10KTL, User Manual

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5 Maintenance and troubleshooting
33
Fault
word
ID Fault/alarm name Cause of failure/alarm Troubleshooting
9
Grid
under-frequency
The grid frequency is lower
than the under-frequency set
by the system.
1. Confirm whether there is a fault
such as box transformer tripping on
the AC side of the inverter through
fault recording and event recording.
2. Confirm whether the frequency
range and time setting are
reasonable.
11 Island effect
protection
Power grid voltage loss.
Detect the cause of grid voltage loss,
such as box transformer tripping, etc.
13 Abnormal grid
voltage
Sudden change of grid
voltage.
Confirm whether the power grid is
normal.
14 LVRT protection
The grid voltage exceeds the
LVRT protection threshold.
Confirm whether the power grid is
normal.
15 HVRT protection
The grid voltage exceeds the
HVRT protection threshold.
Confirm whether the power grid is
normal.
Invert fault
status
word
0
Module phase A
software overcurrent
The effective value of the
inductor current exceeds the
protection threshold.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please
contact Hopewind technical staff.
1
Module phase B
software overcurrent
The effective value of the
inductor current exceeds the
protection threshold.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please
contact Hopewind technical staff.
2
Module phase C
software overcurrent
The effective value of the
inductor current exceeds the
protection threshold.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please
contact Hopewind technical staff.
3
Module current
imbalance
Three-phase current
unbalance exceeds threshold.
Confirm whether the power grid is
normal.
5
Module temperature
is too high.
The temperature of the
radiator is higher than the
protection threshold.
Confirm whether the outer fan is
normal.
6
The internal
temperature is too
high.
The ambient temperature is
higher than the protection
temperature.
Confirm whether the outer fan is
normal.
9
Abnormal residual
current
Residual current overlimit.
1. If it happens by accident, it may be
caused by accidental abnormality of
the external line, and the work will be
resumed after the fault is cleared
without manual intervention.
2. If it appears frequently or cannot be
recovered for a long time, please
check whether the impedance of the
PV string to the ground is too low.
Bus fault
word
status
1 Bus short circuit Bus voltage sag overrun.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please
contact Hopewind technical staff.
5 Bus overvoltage
Bus voltage exceeds set
threshold.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please
contact Hopewind technical staff.
6 Bus undervoltage
Bus voltage is lower than the
set threshold.
1. Reset and check if the converter
works normally.
2. If it appears frequently, please
contact Hopewind technical staff.