SMA NR-SMC-CON Instrucciones Para La Sustitución página 15

SMA Solar Technology AG
3. Remove all cables:
• Remove the AC cable (D) from the screw terminals. When doing so, ensure that the
grounding conductor remains connected to the inverter in order to guarantee ESD
protection.
• Remove the cables (C) coming out of the transformer from the screw terminals.
• Remove the DC link connection (A) from the screw terminals.
• Remove the DC cable (F and G) from the screw terminals.
• If there is an ESS, remove the 2 black cables from the middle screw terminal (E).
Alternatively, remove the bridge on the screw terminal and keep it safe.
4. Unscrew the 10 screws of the CON assembly with a Torx screwdriver (TX 20).
5. Tilt the CON assembly slightly forward at the top and remove it through the front.
7 Installing the new CON assembly
Damage to the inverter due to excessive torques during screw tightening
Screw contact areas may be ruptured due to excessive torques.
• Use only the new screws included in delivery to install the new assembly.
• Tighten all screws with a Torx screwdriver. On no account exceed the specified torques.
Procedure:
1. Disconnect the inverter from all voltage sources (see Section 5, page 13).
2. Insert the new CON assembly into the inverter's enclosure. When doing so, ensure that there
are no cables below the CON assembly and no cables get stuck there, and that the screw
holes in the CON assembly are located directly above the screw holes in the inverter's
enclosure.
3. Secure the CON assembly in place. To do so, insert 2 new screws with a microencapsulated
pre-coating into the screw holes at the top left and right and tighten them slightly.
4. Insert the remaining 8 new screws with a microencapsulated pre-coating into the screw holes
and tighten all ten screws with a Torx screwdriver (TX 20) (torque: 3 Nm).
5. Connect the ribbon cable to the OCS assembly, the power assembly (AST) and the CON
assembly (B).
6. Connect all cables to the CON assembly:
• Connect the DC link connection (A) to the screw terminals (torque: 1.5 Nm). Ensure the
color assignment is correct (BK = black, RD = red).
• Connect the cables coming from the transformer (C) to the screw terminals (torque: 1.5
Nm). Ensure the color assignment is correct (BL = blue, WH = white).
• Connect the AC cable (D) to the screw terminals (torque: 2.5 Nm).
• Connect the connection cable of the Electronic Solar Switch to the screw terminals (E)
(torque: 1.5 Nm). If no Electronic Solar Switch is installed, the bridge must be removed
from the defective assembly and inserted into the new assembly (torque: 1.5 Nm). The
bridge's head must point slightly away from the assembly.
Replacement Manual
7 Installing the new CON assembly
NOTICE
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