Fronius Primo 4.5-1 Serviceanleitung Seite 138

(5)
138
(9)
(6)
(5) (2) (5) (3)
IMPORTANT! When inserting the new PC
board, ensure that the heat-conducting
paste on the modules (9) is not scratched or
removed.
Place the new PC board on the heat
3
sink
Screw the modules onto the heat sink
4
using four 4x9 mm TX20 screws (6).
Tightening torque = 0.5 Nm
Retighten the four 4 x 9 mm TX20
5
screws (6) to 2.0 Nm.
Screw the PrimoPS PC board into pla-
6
ce using 14 4x9 mm TX20 screws (5)
Tightening torque = 2 Nm
Reconnect all the cables (2) - (4) to the
7
PrimoPS PC board
Feed the LVRT cable into the ferrite
8
ring
(5) (4) (5)
NOTE! To avoid mechanical
stress, first tighten the screws with
a tightening torque of 0.5 Nm, then
retighten to 2.0 Nm.