Siemens Water Heater SINVERT 350 Benutzerhandbuch

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There are two different types of fault, i.e. plant faults and operational faults. Plant faults are caused by 
malfunctioning of an inverter component, while operational faults occur as a result of unexpected external 
influences or logical conditions of the control software. 
 
Examples of plant faults: 

• F48 
• F65 
• F97 

 
Examples of operational faults: 

• F94 
• F96 
 

It is however possible for an operational fault to be caused by a defective component.  
Example: Fault 96 can be caused by a defective capacitor or transformer at the AC output. 
 

4.1.2  Fault display / messages 
 
Faults are displayed at the following locations:  

•  Inverter control panel 
•  Control panel in PPsolar 
•  S7 software modules 
• WinCC 

Fault messages are transferred to the following locations: 

• FAX 

Alarm 

• WEB’log 
• WinCC 

 
Sequential faults: In some cases, the first fault can trigger further sequential faults which are 
superimposed on the first fault or overwrite it on the display.