Siemens 440 User Manual

 

MICROMASTER 440 

76 

Operating Instructions (Compact) 

LEDs for indicating 
the drive state 

OFF 

ON 

approx. 0.3 s, flashing

approx. 1 s, twinkling  

 
 

Mains not present 

 

 

 

Fault inverter temperature 

 

 

Ready to run 

 

 
 

Warning current limit  
both LEDs twinkling same time 

 

 

Inverter fault  
other than the ones listed below 

 

 
 

Other warnings  
both LEDs twinkling alternatively 

 

 

Inverter running 

 

 

 

Undervoltage trip / undervoltage warning 

 

 

Fault overcurrent 

 

 

 

Drive is not in ready state 

 

 

Fault overvoltage 

 

 

 

ROM failure  
both LEDs flashing same time 

 

 

Fault motor overtemperature 

 

 

 

RAM failure  
both LEDs flashing alternatively