Replacing A Secondary Unit - SolarEdge SE66.6KUS Installation Manual

6. Unscrew the two conduit nuts in the Primary Unit securing it to the Connection Unit.
7. Remove the screw securing the Primary Unit to the mounting bracket and remove the Primary Unit
from the mounting bracket.
NOTE
If you remove the Primary Unit and do not immediately install a new one, then:
Lock the Connection Unit in the OFF position using a lock on the switch.
o
Use insulation tape to isolate each of the AC and DC wires.
o
Seal the open conduits using duct tape.
o
8. Place the new Primary Unit on the mounting bracket; insert the screw securing the Primary Unit
through the right side of the heat sink and into the bracket.
9. Screw the two conduit nuts in the Primary Unit securing the Connection Unit t o the Primary Unit.
10. Connect the DC, AC wires and the communication connectors to the Primary Unit.
11. For a 3 unit inverter reconnect the AC, DC and comm cables from the Connection Unit to the right
Secondary Unit.
12. Close the Primary Unit cover.
13. Perform the commissioning steps as described in Activating, Commissioning and Configuring the System
Using the Inverter SetApp on page 42.
14. In the monitoring platform, use the Replace button i n the logical layout tab (in site Admin).

Replacing a Secondary Unit

1. Turn OFF the Inverter ON/OFF switch, and wait until the green LED is blinking , indicating that the DC
voltage is safe (<50V), or wait five minutes before continuing to the next step.
WARNING!
If you cannot see Primary Unit LEDs or you cannot connect to the Primary Unit, or if the red LED light is
on indicating a malfunction , wait five minutes for the input capacitors of the inverter to discharge.
Si vous ne pouvez pas voir l'écran de l'onduleur ou si un dysfonctionnement est indiqué sur l'écran LCD,
attendez cinq minutes pour que les condensateurs d'entrée de l'onduleur soient déchargés.
2. Disconnect the AC to the inverter by turning OFF the circuit breakers on the distribution panel.
3. Disconnect all the connectors on the bottom of the Secondary Unit.
4. Remove the screw securing the Secondary Unit to the mounting bracket and remove the Secondary
Unit from the mounting bracket.
5. Place the new Secondary Unit on the mounting bracket.
6. Insert one of the supplied screws through the outer side of the heat sink and into the bracket.
-Three Phase Inverter with Synergy Technology Installation MAN-01-00402-1.4
Appendix D: Replacing System Components
Figure 52: Conduit nuts
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