PV Energy Storage Inverter iStoragE Series
User Manual
6 Maintenance and Troubleshooting
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63
Table6-1
Troubleshooting
Fault
type
Check item
Fault description
Solution
Alarm1
Bus over-voltage
Bus voltage is too
high.
1.Check whether the input voltage of PV1
and PV2 exceed 550v.
2.If not, restart the inverter to see if the
fault still exists. If it still exists, contact
service.
Auxiliary power
supply abnormal
Battery control
system voltage
abnormal.
Restart the inverter to see if the fault still
exists. If it still exists, contact service.
Insulation fault
DC side - ground
impedance is too
low.
1.If the power on time fails in the morning,
it may be caused by wet weather.
2.Use a multimeter to test the impedance of
the ground to the housing. If the impedance
is not close to 0, confirm that there is a
connection problem between the ground
wire and the housing.
3.Test the impedance of ground to PV+ /
PV- / BAT+ / BAT- with a multimeter. If
the impedance is less than 25K ohms, check
whether the connection of each port is
correct.
4.Confirm to install the inverter according
to the manual.
5.Restart the inverter to see if the fault still
exists. If it still exists, contact customer
service.
Residual current
protection
Residual current
exceed allow rage
Restart the inverter to see if the fault still
exists. If it still exists, contact customer
service.
Residual current
hall fault
residual current
detection sensor
Restart the inverter to see if the fault still
exists. If it still exists, contact customer
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