Operating Instructions

Service, maintenance and fault rectification
Fault rectification
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106 | 118
Siemens A5E36496664A_f
Smart Infrastructure 2021-10-11
How to proceed if a fault is discovered
 The variable speed drive has failed one of these tests:
 Remove the Power Module (power unit) in order to replace or repair it.
 A short circuit is present at the input rectifiers or at components of the IGBT
bridge:
 Check the state of fuses in the supply line, of contactors, disconnectors or of
the motor itself.
Remember that an apparently open circuit can also occur following a component
short-circuit and the resulting strong flow of current.