SMA NR-PL-ACRLY5-01 Instrucciones Para La Sustitución página 20

7 Replacement of AST assembly
5. Remove the screws from the power connection on
the AST assembly (TX20 or TX30). If the bolting
block and the terminal lug stick together, the contact
surfaces must be ground prior to the next connection
being made. Ensure that no grinding filings remain
in the device.
6. Clean the contact surfaces on the bolting block and terminal lugs with a suitable cleaning
agent to remove bolt coating deposits.
7. Remove the cables from the working area.
8. Remove the connecting screws of the AC power
controller assembly (TX20). The assembly will also
remain held in place by the spacers once the screws
have been removed.
9. To remove the assembly from the inverter, first carefully swing the left-hand side of the
assembly out of the inverter and lead the assembly past the connections out of the inverter.
20 STP50-ACRLY-AST-RM-xx-10
SMA Solar Technology AG
Replacement Manual