04 OTHER User Manual V1.3-2021-12-15
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PV/BAT
Overvoltage
The PV or BAT
voltage is too
high
The total voltage
(open-circuit
voltage) of each
PV string
is higher than
the maximum DC
input voltage of
the
inverter or the
battery voltage is
higher than the
maximum BAT
input voltage of
the inverter
1. Check if the PV string Voc is lower
than the Max PV input voltage of the
inverter. If the Voc of the PV string is
high, please decrease the number of
PV panels to make sure that Voc
is within the maximum DC input
voltage range of the inverter.
2. Check if the battery voltage is
lower than the maximum battery
input voltage of the inverter. If
the battery voltage is high, please
decrease the
number of battery packs to make
sure the voltage is within the
maximum battery input voltage
range of the inverter.
Over
Temperature
Temperature
inside of the
inverter is too
high
The inverter's
working
environment
leads to a high
temperature
condition
1. Try to decrease surrounding
temperature.
2. Make sure the installation
complies with the instruction on
inverter user manual.
3. Try to close the inverter for 15
mins, then start up again.
Isolation
Failure
Ground insulation
impedance of PV
string is too low
Isolation failure
could be caused
by multiple
reasons like that
the PV panels are
not grounded
well, DC cable
is broken, PV
panels are aged
or surrounding
humidity is
comparatively
heavy, etc.
1. Use multi-meter to check if the
resistance between earth & inverter
frame is close to zero. If it's not,
please ensure that the connection
is well.
2. If the humidity is too high,
isolation failure may occur.
3.Check the resistance between
PV1+/PV2+/PV3+/PV4/+BAT+/PV- to
earth. If the resistance is lower than
the minimum isolation resistance
shown in the table( chapter 2.4.2 ) ,
check the system wiring connection.
4. Try to restart the inverter.Check
if the fault still occurs. If not, it
means it is caused by an occasional
situation, or contact after-sales
Ground Failure
Ground leakage
current is too high
Ground failure
could be caused
by multiple
reasons like
that the neutral
cable on the
AC side is not
connected well or
the surrounding
humidity is
comparatively
heavy, etc.
Check (use multi-meter) if there is
voltage (normally should be close
to 0V) between earth & inverter
frame. If there is a voltage, it means
the neutral & ground cables are not
connected well on the AC side. If it
happens only in the early morning/
dawn /rainy days with higher air
humidity and is recovered soon, it
should be normal.
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