KEHUA TECH iStoragE Series, User Manual

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6 Maintenance and Troubleshooting
PV Energy Storage Inverter iStoragE Series
User Manual
68
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Fault
type
Check item Fault description Solution
exists. If it still exists, contact service.
Grid
over-frequency
Voltage frequency
exceeds the
allowable range
1.Check whether grid abnormal
2.Check whether grid wiring abnormal
3.Restart the inverter to see if the fault still
exists. If it still exists, contact service.
Grid
under-frequency
Grid frequency
exceeds allow range
1.Check whether grid abnormal
2.check whether grid wiring abnormal
3. Restart the inverter to see if the fault still
exists. If it still exists, contact service.
Grid-tied phase
lock abnormal
Phase lock abnormal
1.Check whether grid abnormal
2.check whether grid wiring abnormal
3.Restart the inverter to see if the fault still
exists. If it still exists, contact service.
Alarm8
Battery
over-voltage
alarm
Battery voltage is
too high.
Check whether the actual battery voltage
exceeds the battery charging cut-off voltage
20V.
Battery
under-voltage
alarm
Battery voltage is
too low.
Check that the actual battery voltage is 10V
higher than the battery charging cut-off
voltage.
Overload alarm
When off-grid, the
load exceeds rated
load.
Check whether the load exceeds 0.95 of the
rated power.
Inner sensor
abnormal
Inner temperature
sensor sampling
abnormal
1.Check whether the ambient temperature is
low, if it is low, automatic recovery after
operating for a while.
2.Restart the inverter to see if the fault still
exists. If it still exists, contact service.