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36
6 Troubleshooting and maintenance
6.1 Troubleshooting
Faults mentioned in this part means the inverter enters the
protection state or fault state.
Tip
37
Tab. 6-1: Protection code and solution
Protection description Recommended solution
P009
P010
P008
P007
P006
P005
P004
P003
P002
P001
Displayed code
The leakage
current is too high
The voltage at the grid
side is too high
The voltage at the grid
side is too low
The frequency at the
grid side is too high
The frequency at the
grid side is too low
Islanding protection
The DC voltage is too
low
Output short circuit
Output current DC offset
is too high
Internal synchro
communication fail
Troubleshooting and maintenance Troubleshooting and maintenance
This part introduces the common fault and solving steps, provides
troubleshooting method and skills to the user, and helps the user identify and
solve some common fault of the inverter.
1.Cut off the DC breaker and check if
there is abnormity in the AC side.
2.After the fault is removed, close the
DC breaker and restart the inverter.
3.If the fault occurs repeatedly, please
ask for professional service.
1.Check if the inverter is normally
connected to the grid.
2.Check if the grid voltage and
frequency are complying with the
output scope of the inverter.
3.If the fault above is removed but the
inverter can still not work normally,
please ask for professional service.
The inverter will recover automatically
when the light is sufficient.
The protection state is mostly caused by some external reasons, the inverter
output is not matched with the grid, the grid is power off or the system is not
correctly earthed, and thus the inverter acts to ensure the own safety. The
inverter itself has no defect and can recover from the protection state if the
system is correctly designed and installed.
Sometimes the inverter enters the protection state by the own defect and can
be recovered by resetting or repairing.
The fault state is caused by incorrect design of system, e.g: the DC voltage is
too high, and thus the inverter acts to protect the system safety. The inverter
can be recovered from some faults automatically or by resetting, and some
faults are caused by the own defect of the inverter, and in this case the inverter
cannot be recovered and shall be repaired.
Correctly identifying the fault state of the inverter is helpful for solving the fault,
so please threat as per the following steps:
1) Check if the status displayed on the panel is a protection state or fault state,
and record all error codes.
2) Try the solution listed in Tab.6-1 and 6-2 and meanwhile check as per the
following steps.
●If the voltage at the AC/DC side is normal and if the breaker is switched on?
●If the inverter is installed in a clean , dry and well ventilated place?
●If the cable sectional area satisfies the requirement?
●If the connecting cables is too long?
●If all cables are firmly connected?
●If wiring is reasonable?
●If the safety standard setting is correct?
3) If you
meet any problem that you cannot solve by yourself, please contact
the client service man of Xinqi Power for the optimal solution, please provide
the detailed system installation information, inverter model, serial number and
fault information.
1.Check if the inverter is normally
connected to the grid.
2.Check if the grid voltage and frequency
are complying with the output scope of the
inverter.
3.If the fault above is removed but the
inverter can still not work normally, please
ask for professional service.
1.Switch off the DC breaker and wait 1
minute.
2.Switch on the DC breaker and check if
the inverter can auto reboot.
3.If the fault occurs repeatedly, please ask
for professional service.
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