Siemens sinumerik 828d Service Manual page 140

Service cases - hardware
4.8 SINAMICS S120 Combi
Boundary condition
The reinforcement plates must always be installed when operating the S120 Combi with the
external fan unit.
WRONG:
S120 Combi and external fan unit without
reinforcement plates
CAUTION
Reinforcement plates
Operation without the reinforcement plates is not permissible.
If the reinforcement plates are incorrectly fixed, this can result in an excessively high heat
sink temperature and cause the S120 Combi to prematurely trip.
140
CORRECT:
S120 Combi and external fan unit with
installed reinforcement plates
Service Manual, 03/2011, 6FC5397-5DP40-0BA0
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