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photovoltaic inverters
problem
possible causes
checks/possible solutions
intervention of the
magneto-thermal
differential switch
downstream the inverter.
Display message: W003 Grid Fail
Green LED: FLASHING
Yellow LED: ON
Red LED: OFF
Faulty grid cable connection.
Faulty switch sizing.
Faulty sizing of the differen-
tial protection.
Intervention of the devices
external to the inverter for
protection from transitory
overvoltage.
Damage to the devices for
protection against transitory
overvoltage on the inverter’s
AC side.
•
Check the connections on the
inverter’s AC side (ref. par. 5 of this
guide).
•
Check that the switch’s rated voltage
is (at least) equal to the inverter’s
maximum output voltage.
•
Check that the differential protection
downstream the inverter is A/AC
type with a sensitivity of not less than
300mA.
•
Check the adequacy and status of
the protection devices used. Remove
them and retry. If necessary, replace
them.
•
Check the status of the inverter’s
output varistors; remove them and
retry. If necessary, replace them.
the inverter does not establish
parallel with the grid
Display message: Waiting Sun
Green LED: FLASHING
Yellow LED: ON
Red LED: OFF
The inverter’s input voltage is
less than the start-up voltage.
•
Check that the voltage at the input
terminals is greater than the start-up
voltage.
•
Check that the radiation conditions
are sufficient to operate the system.
•
Check the strings’ and the DC side’s
connections.
•
Check the documentation on the
sizing of the photovoltaic system and
evaluate a possible change to the
start-up voltage on the LCD display.
the inverter does not commu-
nicate through the Rs485 port.
Display message: none.
Faulty communication line
connection.
Faulty assignment of
addresses to the inverters.
Faulty assignment of
communication speed (baud-
rate).
Use of an inappropriate signal
converter.
•
Check the connections between
the inverters and to the monitoring
system (ref. par. 7 of this guide)
and the termination of the
communication line.
•
Check that each inverter has different
address to the others.
•
Check that each inverter has the
baud-rate set at 19200bps.
•
Power One recommends the
purchase of the PVI-RS485_RS232 or
PVI-USB-RS485_232 converter.
•
If the PVI-USB-RS485_232 converter
is used, check that the output is set
correctly.
Summary of Contents for Aurora PVI-10.0-TL-OUTD
Page 31: ......
Page 64: ...Photovoltaic Inverters APPENDIX B Cable wiring diagram for RS485 line...
Page 69: ...Photovoltaic Inverters...
