Removing The Ast Assembly; Installing The Ast Assembly - SMA NR-STP90-5-AST Instrucciones Para La Sustitución

6 Removing the AST Assembly

6 Removing the AST Assembly
1. Disconnect the inverter from all voltage sources (see Section 5, page 12).
2. Remove all connections on the AC power controller assembly:
• Release the connections in the terminals using a
suitable screwdriver.
• Remove the plug.
3. Remove and dispose of all AC power controller
assembly connecting screws.
4. Remove the AC power controller assembly by pulling it towards you. When doing so, carefully
lead the cable harness through the drill hole in the assembly.
7

Installing the AST Assembly

There are sections on this assembly with a safety extra-low voltage circuit (SELV circuit). To ensure
the safety of the circuits, an optical inspection must be carried out before installation.
14 STPTL-20-AST-RM-xx-10
SMA Solar Technology AG
Replacement Manual