Eaton Corporation Page 69 Ver 1.1
Operation Condition
Messages
Descriptions
Communication failure
between microprocessors
SCI failure
Communication between MCU inside is
abnormal
DC bus voltage is
too high
High DC bus
The DC BUS inside is higher than expected
GFCI detection abnormal
GFCI Failure
The GFCI detection circuit is abnormal
Resistance stick abnormal
Damp Failure The function of resistance stick is abnormal
11.2 Trouble Shooting Actions
Trouble shooting action for System Faults Messages
A) Isolation Fault
Conditions: The resistance between the PV + or PV – and grounding is
outside the permissible range, <2M
Ω
.
Corrective Actions:
Restart the inverter again.
If fault still occurs after the unit is restarted, contact the system
installer immediately
Ask the system installer to check if the PV Inverter and PV Modules
are properly insulated throughout the solar system.
B) Grid Fault
Conditions: The grid voltage or grid frequency of the PV Inverter is not
within the permissible range. This can be caused by improper connection
of the AC side; wrong setting of the utility dip switch or the local grid
condition is out of acceptable range.
Corrective Actions:
Check the grid voltage and frequency reading from the LCD displays
If the detected grid voltage is within permissible range, restart the
PV Inverter and try again. If fault remains, contact the system
installer to check the grid voltage and cable connections between
PV Inverter and Utility system.
If detected grid voltage is out of permissible range, contact the
system installer to check the feed-in AC voltage and contact the
utility operator for further action.
