Additional Troubleshooting
1. Check that the modem or hub/router is functioning properly.
2. Check that the connection to the internal connector on the communication board is
properly done.
3. Check that the selected communication option is properly configured.
4. Use a method independent of the SolarEdge device to check whether the network
and modem are operating properly. For example, connect a laptop to the Ethernet
router and connect to the Internet.
5. Check whether a firewall or another type of network filter is blocking
communication.
Power Optimizer Troubleshooting
Problem Possible cause and troubleshooting
Pairing failed
Power optimizers are shaded.
If you connected the inverter to the monitoring
platform, retry pairing remotely (during
sunlight). Make sure to leave the inverter
ON/OFF switch ON and that S_OK appears in
the status screen.
String voltage is 0V
Power optimizer (s) output is disconnected.
Connect all power optimizer outputs.
String voltage not 0V but lower than
number of optimizers
Power optimizer(s) not connected in the string.
Connect all power optimizers
Module(s) not connected properly to power
optimizer inputs (not applicable to smart
modules).
Connect the modules to the optimizer inputs
String reverse polarity.
Check string polarity using a voltmeter and
correct if needed.
Appendix A: Errors and Troubleshooting 65
Three Phase System Installation Guide MAN-01-00505-1.2
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