Power Optimizer Troubleshooting - SolarEdge RESU10H Prime Series Installation Manual

70 Power Optimizer Troubleshooting
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

Malfunction
Pairing failed
PV string Voltage is 0V
PV string voltage not 0V but lower
than number of Power Optimizers
Single Phase Energy Hub Inverter with Prism Technology MAN-01-00842-1.3
Possible Cause and Corrective Action
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/P switch ON and that S_OK appears in
the status screen.
Power Optimizer (s) output is disconnected.
Connect all Power Optimizer outputs.
Power Optimizer(s) not connected in the PV
string.
Connect all Power Optimizers.
Panel(s) not connected properly to Power
Optimizer inputs (not applicable to smart panels).
Connect the panels to the Power Optimizer
inputs.
PV string reverse polarity.
Check PV string polarity using a voltmeter and
correct if needed.