Siemens AG Building Technologies Division CC1U7550.5en 20.07.2017 2/14
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Operational Stat Fault History Last 21 faults
Operational Stat Lockout History Last 9 lockouts 2
Param&Display Ratio Control Gas Settings Curve Params 3
Example: Error history
Display 5en
Fault class
Seventh last fault Current type of fuel
Error code Program phase
Diagnostic code Load in %
Start number
For fixing the display, press
Selection error history
2Example: Lockout history
Display 6en
Fault date
Eighth last fault Fault time
Diagnostic code
Error code Program phase
Start number
Load in % Current type of fuel
For fixing the display, press
Selection of error history
